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Sexual Precocity in a 16-Month-Old+ x- M- l2 f" o- [
Boy Induced by Indirect Topical7 y6 \) `6 v/ r& y# E
Exposure to Testosterone
  |$ @3 z# U8 q% O' ESamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
0 J* g2 ~+ E# ?, u5 s8 Jand Kenneth R. Rettig, MD1% X- B( c& L* G3 C
Clinical Pediatrics
) b6 c# e' J9 P9 qVolume 46 Number 6
, Z5 }/ r( s! b7 }/ x! J6 Y/ w; V! b/ h( x- ZJuly 2007 540-543
6 M+ K, ?/ K! V) u% M" Y# I© 2007 Sage Publications7 ~( w: E& P/ j7 Y2 O9 a0 y% N
10.1177/0009922806296651
( U" w9 l$ V) _. H/ U9 Qhttp://clp.sagepub.com
- X* R5 D) K  @/ t4 mhosted at' ~. O; u' X# H  I# f/ j
http://online.sagepub.com( G" s+ X0 K, ~
Precocious puberty in boys, central or peripheral,
! g1 _# |, p' e+ ?! [. Bis a significant concern for physicians. Central% E1 }2 f' m8 v
precocious puberty (CPP), which is mediated2 y' G( T& `1 d  D
through the hypothalamic pituitary gonadal axis, has, B/ E4 {) c* Q  W" G
a higher incidence of organic central nervous system
5 }0 E5 }% b/ ?/ I% [) {lesions in boys.1,2 Virilization in boys, as manifested2 O" a4 H/ Y  Q: H) K# A# k
by enlargement of the penis, development of pubic: p# h. ~( Y( e/ V6 E  P* W' U
hair, and facial acne without enlargement of testi-  k) V8 R: G+ e# O
cles, suggests peripheral or pseudopuberty.1-3 We
, x" ~9 _5 _4 J8 k  @* q+ Vreport a 16-month-old boy who presented with the: O: m! c7 f* }2 H6 j
enlargement of the phallus and pubic hair develop-( q$ z0 _9 B6 O- ^, t
ment without testicular enlargement, which was due
2 [' V9 ?& _% E, ~4 ^8 a7 {4 `to the unintentional exposure to androgen gel used by
1 ~' w8 t4 {1 Lthe father. The family initially concealed this infor-
- ?: I8 y& b& Nmation, resulting in an extensive work-up for this4 d1 U) b: B% l8 ~, g5 v8 x
child. Given the widespread and easy availability of* h/ a  T6 ^6 f  @
testosterone gel and cream, we believe this is proba-
- h9 K" p5 p8 B& Vbly more common than the rare case report in the
9 W5 _! k7 }+ |: ]$ z+ Yliterature.4
) b# _% L2 J- pPatient Report# b" V4 N0 }+ n* N# @3 }0 [
A 16-month-old white child was referred to the; c- T& J7 t. `; ^* Q
endocrine clinic by his pediatrician with the concern
. `: J- u( [' xof early sexual development. His mother noticed
3 i1 q* j  d0 C: d4 ^light colored pubic hair development when he was+ r* b5 @0 n) M8 h9 a9 w7 Q! X# r
From the 1Division of Pediatric Endocrinology, 2University of
5 x( l/ u' K/ r5 _% RSouth Alabama Medical Center, Mobile, Alabama.
6 O5 O: p6 k5 k* V: GAddress correspondence to: Samar K. Bhowmick, MD, FACE,% M1 \! o9 o- `. T! S3 K( i
Professor of Pediatrics, University of South Alabama, College of" a# L. n0 y, L* E
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
( H  c- w; Y& [* M4 We-mail: [email protected].
: q: ^; I7 s8 K9 Q$ gabout 6 to 7 months old, which progressively became6 t6 T: ]1 T& X/ a  `
darker. She was also concerned about the enlarge-# H" u: k5 g; n& R5 }# O3 N) _1 w# v: B
ment of his penis and frequent erections. The child2 j( m8 B+ e8 z9 [2 w! u
was the product of a full-term normal delivery, with
9 y8 g& ]: Y1 r5 q& Z$ ~" Na birth weight of 7 lb 14 oz, and birth length of
- J3 z! E0 x) K+ f% B20 inches. He was breast-fed throughout the first year' d: F+ {3 c3 Q* z) P
of life and was still receiving breast milk along with
: o' \& @# s1 l6 @9 Z+ }" Y5 vsolid food. He had no hospitalizations or surgery,1 ^1 w' i% N/ b9 w
and his psychosocial and psychomotor development
5 [! u8 A+ x$ Q3 d% bwas age appropriate.2 }* P3 B9 y6 ]1 t
The family history was remarkable for the father,: K- `! ^( F7 N
who was diagnosed with hypothyroidism at age 16,/ e; g- ~" ^4 ~+ {+ P- r
which was treated with thyroxine. The father’s2 T# ]  z- N; q% d3 }# _7 g
height was 6 feet, and he went through a somewhat4 `$ `+ i8 k* k8 _- Y  J; U
early puberty and had stopped growing by age 14.
. ~- p  _9 B: S+ ~5 e2 WThe father denied taking any other medication. The# r, r- M5 y: M: }
child’s mother was in good health. Her menarche
% Z" {' [+ m7 o; d+ m  k8 Kwas at 11 years of age, and her height was at 5 feet
/ Y9 a1 z) F3 E) R4 A' y& n) H5 inches. There was no other family history of pre-0 m0 Y4 r3 t* k3 e  z; h$ i
cocious sexual development in the first-degree rela-
! E, f4 a9 H& E. d4 s. ptives. There were no siblings.0 \- G7 M* q. S9 C8 O
Physical Examination
9 B; _! m* R* nThe physical examination revealed a very active,
) u* a3 l7 I- r8 o5 j6 m, oplayful, and healthy boy. The vital signs documented
0 }; E& j/ _% F# A* Qa blood pressure of 85/50 mm Hg, his length was  B4 C' I  l4 y3 S' C; o  w* l
90 cm (>97th percentile), and his weight was 14.4 kg
3 g  f/ b, R/ _  U) N9 p0 A(also >97th percentile). The observed yearly growth( ~5 t% G9 {# c% N- T( U  }5 E
velocity was 30 cm (12 inches). The examination of
% m8 \6 G2 w) a% \- _the neck revealed no thyroid enlargement.& F% i9 R" x6 \; T$ p6 x  i
The genitourinary examination was remarkable for
* {4 V: Q. r: s* Z. l3 m, Lenlargement of the penis, with a stretched length of4 T: I7 r6 D% _+ y0 n, E$ |
8 cm and a width of 2 cm. The glans penis was very well/ ~0 N5 Y8 R" j- J  c: u
developed. The pubic hair was Tanner II, mostly around
& ^* J+ y* R& Z5409 y+ }- L2 f  k# A9 N! i
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( G" J* A  i. o0 s; L' [
the base of the phallus and was dark and curled. The
5 J1 d/ A/ ]: {5 Ztesticular volume was prepubertal at 2 mL each.
0 w$ f3 V( n+ X+ p) x) r" I5 iThe skin was moist and smooth and somewhat
2 i7 V: b, [( ~6 r" L) l3 l) joily. No axillary hair was noted. There were no+ F: r6 }4 u( {6 a, `4 J: |3 D
abnormal skin pigmentations or café-au-lait spots.
; k( E  D, q7 L# ?5 S9 u) a9 WNeurologic evaluation showed deep tendon reflex 2+
' F' C/ s0 C( N9 r" ?6 y. ~& hbilateral and symmetrical. There was no suggestion
- i9 E1 c0 o7 E' Xof papilledema.7 V3 `/ f0 U: q. U& w3 B
Laboratory Evaluation0 {; E5 x. L, ]/ w3 i
The bone age was consistent with 28 months by7 c2 b4 W2 B, T4 l2 ]
using the standard of Greulich and Pyle at a chrono-
* W8 T3 x7 `" c1 e  _3 hlogic age of 16 months (advanced).5 Chromosomal
# {5 [! v- Z5 L1 m3 Gkaryotype was 46XY. The thyroid function test9 }+ U5 {% d) C1 p8 z3 m* ?
showed a free T4 of 1.69 ng/dL, and thyroid stimu-! U( B- i: [4 w# b6 @& ~
lating hormone level was 1.3 µIU/mL (both normal).8 n, Q7 ~' b/ _2 S8 L$ p
The concentrations of serum electrolytes, blood
+ V+ ^' ?3 w2 A+ \& U' a" `urea nitrogen, creatinine, and calcium all were9 w' I3 Z- i0 Z7 S0 a# H  ~. _8 z
within normal range for his age. The concentration: w% _4 ^" u% P: h' k$ y% j* W
of serum 17-hydroxyprogesterone was 16 ng/dL
; s. r$ C: W! u8 w' [( A" U0 V(normal, 3 to 90 ng/dL), androstenedione was 20- p. N1 }- q8 l1 v# `
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-( ]" E4 l5 z9 @7 I- E6 G3 h: l
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
0 P2 m* T/ f% edesoxycorticosterone was 4.3 ng/dL (normal, 7 to7 E  ^  U% E; K: o
49ng/dL), 11-desoxycortisol (specific compound S)8 m4 j( C9 ~0 E, p! y" y* b( V
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
* O7 |6 d9 _% Utisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total' R, `5 O3 q, ^2 R- A
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),; z1 M: c( ~+ }* W- j- N
and β-human chorionic gonadotropin was less than. i% I+ d1 ^4 r8 L# P
5 mIU/mL (normal <5 mIU/mL). Serum follicular) P7 r6 T9 M! e& B
stimulating hormone and leuteinizing hormone/ f/ w  J, u& n
concentrations were less than 0.05 mIU/mL
* t( K, d% q6 o! l(prepubertal)./ L! j) h, m6 j# H& L
The parents were notified about the laboratory
- }; x8 H1 V4 G$ o  R: P/ z% kresults and were informed that all of the tests were
4 P+ L9 v) Q0 ^9 [3 e% @* Bnormal except the testosterone level was high. The) T: ^0 m2 I0 h
follow-up visit was arranged within a few weeks to
3 H% b3 ?7 J$ ?0 J" [& f" |obtain testicular and abdominal sonograms; how-+ h( |$ Y" Q2 Q
ever, the family did not return for 4 months.# c" D" t- X' n6 _( N' ]
Physical examination at this time revealed that the
/ ^+ Y/ Z# ~# B* o+ l/ v0 ~- Hchild had grown 2.5 cm in 4 months and had gained7 z& g: i2 d$ [+ s9 }
2 kg of weight. Physical examination remained
# W' M# B$ g( E) s( u) S. f$ L7 junchanged. Surprisingly, the pubic hair almost com-
8 h: t% h7 Z3 [) U1 lpletely disappeared except for a few vellous hairs at/ C; H+ [+ a0 O9 g! c
the base of the phallus. Testicular volume was still 2
5 ^0 a! g% _" G+ mmL, and the size of the penis remained unchanged.
& h# i# a- f7 C4 ~$ AThe mother also said that the boy was no longer hav-
- J% d$ s, @( ?$ D- Fing frequent erections.
8 J; L- ?) N5 O) x/ T/ RBoth parents were again questioned about use of
, D9 I: i2 F, q+ n& E- Tany ointment/creams that they may have applied to" M' l# J! I+ D1 k
the child’s skin. This time the father admitted the% F7 `8 }* [  F- l
Topical Testosterone Exposure / Bhowmick et al 541
, j+ ~2 R2 @3 v% |; `use of testosterone gel twice daily that he was apply-" g) u  i  H5 `2 g5 r2 L* @
ing over his own shoulders, chest, and back area for4 [" s! X8 n" l) P( J. x# i
a year. The father also revealed he was embarrassed
0 a4 u  J% [3 T: V- E6 Vto disclose that he was using a testosterone gel pre-
7 m' a2 w3 d. s' tscribed by his family physician for decreased libido
) t* o$ K  X0 p( I! K/ Hsecondary to depression.3 D" m" Y! n: l6 H, Y7 V* p5 o* H
The child slept in the same bed with parents.  w6 H% H2 [9 U( q
The father would hug the baby and hold him on his
% Z  K* ~' R, h3 Qchest for a considerable period of time, causing sig-5 w( Z6 ^$ H& n$ M
nificant bare skin contact between baby and father.
, y0 M3 |! V1 mThe father also admitted that after the phone call,
  g( t6 j4 Q8 O, Pwhen he learned the testosterone level in the baby
0 U, `, s% @0 H) ]( b" Hwas high, he then read the product information6 o$ H+ z& b# z& Y
packet and concluded that it was most likely the rea-% G* y& S+ z  N) k: m6 F6 O. U: l
son for the child’s virilization. At that time, they7 ?. S% {$ K1 S  a& G) e, Q
decided to put the baby in a separate bed, and the/ N/ ]) f9 _6 R  i3 E
father was not hugging him with bare skin and had  W9 |. l' `7 V$ h" C* O/ v* ]( |
been using protective clothing. A repeat testosterone$ e  ]( ?) C: Z0 q
test was ordered, but the family did not go to the) \9 Z' N0 b, C5 m8 T$ H
laboratory to obtain the test.' X! }& y% B; ^8 [7 ]1 o+ g  L
Discussion
' L. \2 ?2 ^" _Precocious puberty in boys is defined as secondary1 J: P( a2 t4 x( t
sexual development before 9 years of age.1,43 l; H) K% s  U
Precocious puberty is termed as central (true) when  c+ f7 ~6 C" `6 W& i, N
it is caused by the premature activation of hypo-2 X" j" u& G- s
thalamic pituitary gonadal axis. CPP is more com-4 v, R- d- j4 V1 X6 [- A
mon in girls than in boys.1,3 Most boys with CPP6 m5 i* D' t" y9 ?
may have a central nervous system lesion that is' F/ m) K( k3 Q/ \5 S4 q
responsible for the early activation of the hypothal-% w1 u8 |; Y* T6 u
amic pituitary gonadal axis.1-3 Thus, greater empha-
2 K5 Q- b, X2 g5 fsis has been given to neuroradiologic imaging in
- O/ ]* x6 t8 ]* C; _boys with precocious puberty. In addition to viril-
  ^8 `4 ]7 ^& s/ o" p' A% nization, the clinical hallmark of CPP is the symmet-
+ U: B; I( J5 i7 ^' d4 g8 \rical testicular growth secondary to stimulation by
/ t; V# ?9 j- ]/ M% J! J5 _gonadotropins.1,3
$ i! O7 y! o) `# `Gonadotropin-independent peripheral preco-- C9 M! t+ X% j6 t' a" K
cious puberty in boys also results from inappropriate# V. P8 j' B' m% ^! Q6 A
androgenic stimulation from either endogenous or
; _& Q5 r. d, S# L0 h0 h# Gexogenous sources, nonpituitary gonadotropin stim-
& M6 \# d/ p" E/ s; j8 [  {ulation, and rare activating mutations.3 Virilizing8 b% \* o. ]. {+ _1 B+ ~+ @: P! E
congenital adrenal hyperplasia producing excessive
, j# C6 [! \/ _% g- Ladrenal androgens is a common cause of precocious
- r' R# _: N7 [1 n5 F% b' Fpuberty in boys.3,4
# G6 w) Z; h& L0 i& RThe most common form of congenital adrenal$ W: D( ^6 g/ `! l+ X) Z+ R
hyperplasia is the 21-hydroxylase enzyme deficiency.
. [% O% @" o1 S, }! oThe 11-β hydroxylase deficiency may also result in
0 }% U6 A! u, a5 S8 }3 Xexcessive adrenal androgen production, and rarely,
& M" U, ]# g) v6 u" yan adrenal tumor may also cause adrenal androgen1 I4 @( F2 f6 M) S/ D5 e" U. \" p
excess.1,3
2 x% [1 ^# |& e8 l  }at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 t: @" z5 ], |9 Z542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
; y  t7 H: i- w: JA unique entity of male-limited gonadotropin-% W- A) J/ H" _; F
independent precocious puberty, which is also known% c/ F0 I* {4 w# J- p
as testotoxicosis, may cause precocious puberty at a# }( I. M9 J- \# T* j
very young age. The physical findings in these boys
, r; |# Y, L% Kwith this disorder are full pubertal development,, X8 U1 U, P- U# t
including bilateral testicular growth, similar to boys7 h5 m' O! U. @) a  ?. I$ [8 H+ D
with CPP. The gonadotropin levels in this disorder
, ^- @3 R& p, {8 {are suppressed to prepubertal levels and do not show
& @! a4 T' c# d1 F  \1 B+ C) D7 dpubertal response of gonadotropin after gonadotropin-. B- M* i/ x4 ]8 A
releasing hormone stimulation. This is a sex-linked0 A8 X/ t8 z6 e7 N! B+ V6 }
autosomal dominant disorder that affects only" n  q8 o3 h6 ~2 Z. ~. M1 a0 Z
males; therefore, other male members of the family! ^2 t4 A4 g+ `/ e5 B
may have similar precocious puberty.3* p9 Q  y2 N% u8 O+ y
In our patient, physical examination was incon-2 R1 S& [) Z8 _9 j0 X: ]3 E
sistent with true precocious puberty since his testi-) t1 ]( X3 r( k3 _4 b
cles were prepubertal in size. However, testotoxicosis% S  r, J3 ?; }; p5 t/ a$ O
was in the differential diagnosis because his father
% [" z8 X# E; M; K5 Z" {started puberty somewhat early, and occasionally,- j2 L) M/ U1 p
testicular enlargement is not that evident in the
7 B+ j+ m" a2 ?  v4 pbeginning of this process.1 In the absence of a neg-
% m3 j$ K$ g4 r1 r  B  z6 L  {ative initial history of androgen exposure, our
" l( C: C2 N- O. p0 M% U  v+ _' pbiggest concern was virilizing adrenal hyperplasia,& P' a* I& i9 Y6 W) D, r
either 21-hydroxylase deficiency or 11-β hydroxylase5 l3 J  S6 ^5 E" F+ K
deficiency. Those diagnoses were excluded by find-
$ Q; l9 A) ]% {( W  C/ Ring the normal level of adrenal steroids." X2 o6 \3 ~- x2 e, B' H
The diagnosis of exogenous androgens was strongly
" Y( E/ a9 J1 ]2 e0 h- M& d: c* Lsuspected in a follow-up visit after 4 months because
4 ?- d; k) O" h3 tthe physical examination revealed the complete disap-# [1 u: G! {6 j  K+ o
pearance of pubic hair, normal growth velocity, and5 z: h/ `/ `% }& V
decreased erections. The father admitted using a testos-( ]6 ?8 v; i# z; T
terone gel, which he concealed at first visit. He was& ]" W, |& P/ I1 u& g8 G
using it rather frequently, twice a day. The Physicians’
& D" N4 t: l; F0 s  q' ZDesk Reference, or package insert of this product, gel or
" u& `) x/ C! I% }) b2 D) _cream, cautions about dermal testosterone transfer to; c% f+ a9 E* S  f' C8 h
unprotected females through direct skin exposure.
% V. X/ _$ u* A1 o$ zSerum testosterone level was found to be 2 times the3 j* o! ~( G7 i8 w2 @- g9 j
baseline value in those females who were exposed to
  s$ k0 L) T0 a; m/ Qeven 15 minutes of direct skin contact with their male
4 n9 p8 U# D) l2 u8 ^/ T" _partners.6 However, when a shirt covered the applica-* A. Q& l8 r) O8 B" \
tion site, this testosterone transfer was prevented.
$ Q* w$ j0 l3 }. {+ w4 eOur patient’s testosterone level was 60 ng/mL,
7 u( C) |( f, j4 V) rwhich was clearly high. Some studies suggest that
8 z3 e4 A6 r- w' q& N. `/ |dermal conversion of testosterone to dihydrotestos-
4 y! b4 p( Y+ \. u1 N' p5 x3 F- Y3 [terone, which is a more potent metabolite, is more+ S: e, F( w% G' V$ L7 u& d2 k( W
active in young children exposed to testosterone0 v" O7 `% i- L; O+ R% |
exogenously7; however, we did not measure a dihy-
  r2 g* U* V& e2 pdrotestosterone level in our patient. In addition to6 R: h- `3 B* J  S
virilization, exposure to exogenous testosterone in
7 q3 Z- H: h# }9 e. Zchildren results in an increase in growth velocity and" `/ k) D4 ~% a
advanced bone age, as seen in our patient.
+ F3 k3 {, Z, L4 i2 t  d* wThe long-term effect of androgen exposure during
/ n, H( X9 }7 b* E9 r/ Tearly childhood on pubertal development and final
2 a+ ?( a& W4 u0 T' Cadult height are not fully known and always remain
  K2 U: Q5 \( c. `) \a concern. Children treated with short-term testos-
  A! l/ Y! c( E6 u+ u+ [terone injection or topical androgen may exhibit some
* r* E5 l$ g6 c5 vacceleration of the skeletal maturation; however, after
  N! i/ b6 _' icessation of treatment, the rate of bone maturation
: j! [7 l! T" J$ m& w4 I6 Ldecelerates and gradually returns to normal.8,9
; k: n! {/ e6 f' C9 {- x4 u- |There are conflicting reports and controversy. ^, z* `+ e  s. c
over the effect of early androgen exposure on adult
& f3 Z- a6 B: h1 s/ Ppenile length.10,11 Some reports suggest subnormal1 x) ~3 [* z3 O4 r' _
adult penile length, apparently because of downreg-
* D, P& |- S% X; @, {3 m1 Mulation of androgen receptor number.10,12 However,5 g. w' y2 A& m
Sutherland et al13 did not find a correlation between# F3 F( `& r* [3 O6 m' s
childhood testosterone exposure and reduced adult
' g* b4 z8 j0 d# ^' _2 p2 Qpenile length in clinical studies.
' D  {+ W- M. }! y" C. k+ \Nonetheless, we do not believe our patient is" o1 V) U+ w, q
going to experience any of the untoward effects from
3 ~# [* a2 K" Z% s: atestosterone exposure as mentioned earlier because
$ x, [- ~- O+ I* w, A. wthe exposure was not for a prolonged period of time.- Q; I5 I# V3 J0 w
Although the bone age was advanced at the time of! u- m2 ?* p! a: a1 I% D# o
diagnosis, the child had a normal growth velocity at
6 ^2 ]0 E' w3 @5 Dthe follow-up visit. It is hoped that his final adult0 L/ X8 F5 B- i! @: ~
height will not be affected.
- _. B" \0 K5 z( ^5 c6 B2 |) ^Although rarely reported, the widespread avail-+ Z3 F# d# q$ ^
ability of androgen products in our society may1 i5 W% J4 w6 A/ W6 C/ j
indeed cause more virilization in male or female
+ C) z9 w) u3 H& n/ dchildren than one would realize. Exposure to andro-* B, b2 g4 g5 v" J
gen products must be considered and specific ques-
; C/ u; k& X, u+ d+ V5 e" ^" ~" d' qtioning about the use of a testosterone product or
6 `' ?8 t  E. v& vgel should be asked of the family members during2 X/ `8 D. R$ @
the evaluation of any children who present with vir-
3 ~( G* S, Q* |# Z2 F6 [# E/ Q  lilization or peripheral precocious puberty. The diag-
% s3 r8 |9 S. i) J! Vnosis can be established by just a few tests and by
) q# S" Y8 ?5 r7 h2 a$ ^appropriate history. The inability to obtain such a
5 S2 X3 _9 N# bhistory, or failure to ask the specific questions, may
# `) F. W6 Y) F+ P, |result in extensive, unnecessary, and expensive6 `9 y+ l; Y" c2 B5 }
investigation. The primary care physician should be
, G- {8 f/ |% [* u0 a1 p8 ?aware of this fact, because most of these children5 [- d" Z8 ?" A7 a. b# i
may initially present in their practice. The Physicians’7 T. `9 ^  Z3 J7 m% m7 j' j
Desk Reference and package insert should also put a
, H  d2 b; y- \* qwarning about the virilizing effect on a male or* f3 T4 @0 V) |, P+ H
female child who might come in contact with some-
; d! h, P! S9 @# n" [5 |0 \one using any of these products.
3 h. g% r1 p9 YReferences% f) S3 Z0 k& }7 [9 E
1. Styne DM. The testes: disorder of sexual differentiation8 L( K: x; {; D2 G* m% _
and puberty in the male. In: Sperling MA, ed. Pediatric$ q& s0 ^6 q& G$ o
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;/ M  K" ~) j0 ?* ^8 g- Z# E
2002: 565-628.
6 [5 M0 `  X6 M( m% ]/ t7 f2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious4 d3 d( C, G9 t
puberty in children with tumours of the suprasellar pineal
發表於 2025-1-4 03:27:02 | 顯示全部樓層
Sexual Precocity in a 16-Month-Old
2 W2 J6 h. Z* jBoy Induced by Indirect Topical
, t6 F! s4 W6 [  h. S: Y1 z6 U+ DExposure to Testosterone2 h& u* C1 z' c( t. `3 `
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,23 l& L7 \' G' \9 I. }1 s8 C+ n
and Kenneth R. Rettig, MD1
0 n* E+ h# Z0 r3 dClinical Pediatrics
, }5 {- s' ~" iVolume 46 Number 63 \, Q+ z8 A. k2 S2 T! {* f& Z
July 2007 540-5437 a: ~  @  f; x6 H1 K0 Q: z4 {9 j
© 2007 Sage Publications
& B, L2 F) d& k- G  P10.1177/0009922806296651
) T- }; C; ?* Y5 R5 @http://clp.sagepub.com; {# p* ]# v% w. K% y
hosted at
" x* e" }1 b0 V* z! N  yhttp://online.sagepub.com
2 x' b7 O/ _+ W$ xPrecocious puberty in boys, central or peripheral,
% [1 n! d' d+ B* a6 J+ m  t3 _is a significant concern for physicians. Central
, [: T1 D: s7 |precocious puberty (CPP), which is mediated
: A9 A. V" ]2 g- Q6 N! Fthrough the hypothalamic pituitary gonadal axis, has
7 |& k" x4 C: }; W% a/ Ma higher incidence of organic central nervous system* Y% O, `; f2 }1 r" R2 ~1 _
lesions in boys.1,2 Virilization in boys, as manifested
; h' O  D) [2 R6 W6 a9 m& s' P/ Iby enlargement of the penis, development of pubic# Y+ ?2 j4 g/ n1 C
hair, and facial acne without enlargement of testi-
4 b  b# b' B% s, Jcles, suggests peripheral or pseudopuberty.1-3 We
$ c# T' a, K: I  l! \* ureport a 16-month-old boy who presented with the6 H0 U* f, C. s% V
enlargement of the phallus and pubic hair develop-* E, x8 E1 X# i' w3 l8 a
ment without testicular enlargement, which was due
2 S+ |# u$ Y- P/ r6 R' i8 Rto the unintentional exposure to androgen gel used by* Y) D" b$ W- @& `# K0 X8 t: T- y
the father. The family initially concealed this infor-
- ]) P. f# @! d3 w7 a5 T. lmation, resulting in an extensive work-up for this. n. |: g% x* w- \
child. Given the widespread and easy availability of+ O& p9 w! a9 p* X& ~4 t, X
testosterone gel and cream, we believe this is proba-5 |, Z' T$ q5 g6 z/ B( T# B
bly more common than the rare case report in the
# T/ O& I( x* d8 aliterature.4- g: G' ^, Z% P
Patient Report' [: t* f" _' ]
A 16-month-old white child was referred to the5 {( c' a9 J3 E- r! l2 {0 O8 d1 z) i
endocrine clinic by his pediatrician with the concern; r/ ]# f: B. L9 x4 u% I6 y
of early sexual development. His mother noticed& t, q6 f3 h7 G
light colored pubic hair development when he was/ S/ G; \7 C  K
From the 1Division of Pediatric Endocrinology, 2University of
+ s9 W) c* a$ E& A5 @2 R- TSouth Alabama Medical Center, Mobile, Alabama.
! N8 Q" [+ v8 H+ a5 TAddress correspondence to: Samar K. Bhowmick, MD, FACE,) ]$ ]6 G" S% ?! k  S
Professor of Pediatrics, University of South Alabama, College of
% u2 c) G5 _3 @$ TMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;2 y- B* Z/ V8 A) U- R7 P) s& ]$ P
e-mail: [email protected].+ Y/ E$ @$ U% k$ e% p$ Q' C
about 6 to 7 months old, which progressively became
1 W0 n2 r1 t* odarker. She was also concerned about the enlarge-
9 T" M8 I! {" n% Y0 e4 Mment of his penis and frequent erections. The child, Z) L- e6 O- v" S
was the product of a full-term normal delivery, with5 k$ q: Y' A, d5 P9 \6 V3 m$ h7 g
a birth weight of 7 lb 14 oz, and birth length of
' y7 w) ^( [& d* T0 K20 inches. He was breast-fed throughout the first year+ n1 X( o$ @; U; V
of life and was still receiving breast milk along with1 }$ S1 x9 Y% n! i& O5 W
solid food. He had no hospitalizations or surgery,6 \) }8 Z) \" @0 h2 v- S  s
and his psychosocial and psychomotor development0 e' i: a. Y  z7 o1 E
was age appropriate.! S4 ^" M1 T1 K8 f/ n
The family history was remarkable for the father,
) H' ?2 W1 W8 U: h; I' \. rwho was diagnosed with hypothyroidism at age 16,0 h+ A" a5 L3 j! y
which was treated with thyroxine. The father’s2 e' I, @' S. M8 H" Z4 \6 a2 W
height was 6 feet, and he went through a somewhat
. Q: I" f# E! s" a) g" pearly puberty and had stopped growing by age 14.' _0 B4 V7 W8 n* S) X; O
The father denied taking any other medication. The( w! D0 C7 r# U# y5 m
child’s mother was in good health. Her menarche+ Y# x+ H, o- w: j' Q
was at 11 years of age, and her height was at 5 feet
! R4 n! X+ f- d- R5 inches. There was no other family history of pre-( i5 d% C7 u/ Q+ Y; R+ m1 n
cocious sexual development in the first-degree rela-
+ M) q6 y! _5 ?& ctives. There were no siblings.
7 _! q4 L9 q) ^. r5 U* b0 x2 YPhysical Examination5 }7 q- i3 V: C/ J% g( s7 L/ O
The physical examination revealed a very active,( A5 r: O' Y* X+ f
playful, and healthy boy. The vital signs documented
) ?3 V. h$ \6 I. `0 y" t/ b( v# Wa blood pressure of 85/50 mm Hg, his length was
0 B5 ]  k& T3 ^! i90 cm (>97th percentile), and his weight was 14.4 kg
8 l6 [! v1 c) B! p(also >97th percentile). The observed yearly growth. ?! j; t2 E8 V3 b
velocity was 30 cm (12 inches). The examination of
- ]( o  y* ?4 jthe neck revealed no thyroid enlargement.
/ {0 ~) n% \) `. p) e4 D3 n& `The genitourinary examination was remarkable for
- Z& b( U3 f0 M* e/ Penlargement of the penis, with a stretched length of& \, N" ]! F* x% \+ i
8 cm and a width of 2 cm. The glans penis was very well# J: Q1 z9 h, j
developed. The pubic hair was Tanner II, mostly around; A5 F  @- s# J# \; W
540, v9 {$ X  h+ n  x+ w: o9 V- W
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 p% r9 {! d/ ?: E0 X# Q6 r: X/ Xthe base of the phallus and was dark and curled. The; O$ m6 M; X2 X. f1 U0 T
testicular volume was prepubertal at 2 mL each.
* S. K9 a  [* ZThe skin was moist and smooth and somewhat. a3 c7 U7 w6 @1 d0 w9 T7 b
oily. No axillary hair was noted. There were no
! ]7 I. K8 Q" N5 Gabnormal skin pigmentations or café-au-lait spots., R/ m) h1 M9 I" [/ k% `7 x. T
Neurologic evaluation showed deep tendon reflex 2+, S1 z- b0 @0 P% v% Y; l5 i
bilateral and symmetrical. There was no suggestion6 u2 Y$ z; d3 G" L! y4 w8 a6 D
of papilledema.
) \8 S1 b8 F6 F$ B' A5 |Laboratory Evaluation& \7 W# g, ]( H% P1 H4 @  H: u
The bone age was consistent with 28 months by
1 Q# g  H. a, \4 [6 }# \2 h5 wusing the standard of Greulich and Pyle at a chrono-
  s% ?. \3 |' J3 Y* Z0 blogic age of 16 months (advanced).5 Chromosomal
& O6 E! a5 @1 o2 T# L2 `karyotype was 46XY. The thyroid function test% u4 Z% @" B: n( |' M; L$ s
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
& T+ p; y; \8 D! `9 k. R3 I7 Qlating hormone level was 1.3 µIU/mL (both normal).! A2 n* q) B- E
The concentrations of serum electrolytes, blood
4 W% y3 Q# |0 p1 v/ O  c/ jurea nitrogen, creatinine, and calcium all were
, b9 \9 H2 j$ r$ T& mwithin normal range for his age. The concentration
4 E) H6 M) V) q4 t& a( u. V' H" aof serum 17-hydroxyprogesterone was 16 ng/dL
$ ~8 J- Q7 _( N  |+ e* }(normal, 3 to 90 ng/dL), androstenedione was 20
& U1 m/ ^8 t' ]! c- ]ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
: z3 h! V& Q* f/ J( C# v+ Oterone was 38 ng/dL (normal, 50 to 760 ng/dL),
  n- P# l/ ?1 z7 G/ _: l/ z& i, s0 ^desoxycorticosterone was 4.3 ng/dL (normal, 7 to
$ n/ u( y5 E! l  L0 t' v( v% U  \/ H49ng/dL), 11-desoxycortisol (specific compound S)  a$ z2 @9 L  |% `
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
, O& W0 ^4 B6 f* Q/ {" s$ [tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
! g. o2 X9 c! M# _6 P8 |testosterone was 60 ng/dL (normal <3 to 10 ng/dL),+ m* d- i# n; N0 s! \& w
and β-human chorionic gonadotropin was less than, |" R2 l# i& o- `8 g7 \% s& E
5 mIU/mL (normal <5 mIU/mL). Serum follicular
9 n, R8 X+ l8 }' r7 w9 O1 }5 Qstimulating hormone and leuteinizing hormone4 N+ E4 A3 t& _
concentrations were less than 0.05 mIU/mL0 a5 r3 r5 J) S
(prepubertal).
6 {% W- W6 S8 K' uThe parents were notified about the laboratory: F9 i$ o% C. _" a5 |) J
results and were informed that all of the tests were  I9 q1 E6 |! {8 ^# V+ ~$ {9 _
normal except the testosterone level was high. The
0 `. ^2 `$ k# Qfollow-up visit was arranged within a few weeks to
) X4 \/ e8 t5 hobtain testicular and abdominal sonograms; how-
# O% }7 c$ Z! yever, the family did not return for 4 months.7 a. k9 p) c9 |1 o2 M) Q
Physical examination at this time revealed that the/ v0 F* t1 y* q- g' c1 s
child had grown 2.5 cm in 4 months and had gained& q5 P( C8 |9 O
2 kg of weight. Physical examination remained9 W! r/ D& c* X, p; u
unchanged. Surprisingly, the pubic hair almost com-
7 N3 r* M& k, V- H3 @5 f  Zpletely disappeared except for a few vellous hairs at) n& q1 J& @( P; {% _
the base of the phallus. Testicular volume was still 2
" e& F4 d  k" N1 A2 ^mL, and the size of the penis remained unchanged.
" T2 G! ?. L( S2 V" {The mother also said that the boy was no longer hav-
( S  Z% T0 o6 g! [1 V6 qing frequent erections.
0 o) i, }9 _: p; L" `Both parents were again questioned about use of
: D, j( N& S2 a' `any ointment/creams that they may have applied to+ v. |9 W7 _- A, ~
the child’s skin. This time the father admitted the, A3 @2 V% H: T6 e+ x, F, \! R
Topical Testosterone Exposure / Bhowmick et al 541+ z! f) g& K1 _0 \
use of testosterone gel twice daily that he was apply-
1 q) P0 @: e4 f5 G: N' u) s* ]ing over his own shoulders, chest, and back area for8 N( `' E2 H+ ?8 M4 N! N) j
a year. The father also revealed he was embarrassed% U8 C( G; h# d9 {( @. R; `& U8 ?
to disclose that he was using a testosterone gel pre-
- S7 D' ]) \, ~" z9 `: X* C' ]scribed by his family physician for decreased libido- M& ]1 B# Z" k- v
secondary to depression.  ?# z) m* w. c  r1 e3 {
The child slept in the same bed with parents.
/ R4 ~5 i% `- ~: v3 D# ?The father would hug the baby and hold him on his
$ s6 u$ P( f$ Zchest for a considerable period of time, causing sig-5 u7 ^* A: n2 Z1 O  z  [" p& E$ _
nificant bare skin contact between baby and father.
# X: T' Q& {. dThe father also admitted that after the phone call,9 c0 [& ^- ]7 F
when he learned the testosterone level in the baby
+ v7 W  I8 ^5 l$ ~/ c3 G; Cwas high, he then read the product information
5 l: r; I" S, s' Tpacket and concluded that it was most likely the rea-
& a% f- P5 d6 @6 Mson for the child’s virilization. At that time, they
& y( P# A+ V- ^. {- Q9 x$ n3 gdecided to put the baby in a separate bed, and the- V: M* ]3 ^/ \: ?; F; J
father was not hugging him with bare skin and had
) z8 r# V  g- Dbeen using protective clothing. A repeat testosterone4 n4 I. J* l# ?- `5 @/ J1 Q  z
test was ordered, but the family did not go to the
7 i! k( n! x3 \  v9 zlaboratory to obtain the test.& q2 V! G1 Y% O
Discussion
  ]- R5 y& R/ ^* J5 L' fPrecocious puberty in boys is defined as secondary
- Z/ M; t! y# F7 J; xsexual development before 9 years of age.1,46 r/ Q. t; i& `
Precocious puberty is termed as central (true) when
3 H7 W0 m; T& B' v% s' k% sit is caused by the premature activation of hypo-% _) `% b! m) E4 q( X7 {
thalamic pituitary gonadal axis. CPP is more com-( O( v4 t  b/ `* F; [3 W
mon in girls than in boys.1,3 Most boys with CPP
/ \7 e; @) h) V- v0 ]may have a central nervous system lesion that is
7 W* V. `6 s* O8 U3 A7 x, hresponsible for the early activation of the hypothal-$ B1 [, k0 [* x8 q1 T3 y; q6 P
amic pituitary gonadal axis.1-3 Thus, greater empha-
. V; S. i4 r8 Fsis has been given to neuroradiologic imaging in/ a6 y3 T: B2 ^7 s
boys with precocious puberty. In addition to viril-
7 a& u: C2 {0 wization, the clinical hallmark of CPP is the symmet-2 ^3 K! `/ c' o7 ]
rical testicular growth secondary to stimulation by
* G) Y: c" r! c. L6 Z5 j( ]. jgonadotropins.1,3
' J. w$ K7 s; |- h& o* RGonadotropin-independent peripheral preco-
; [) L2 p9 h. m' j" Acious puberty in boys also results from inappropriate4 p5 B' R- O0 Y* e/ }+ e
androgenic stimulation from either endogenous or  |/ t* A. j" g; O
exogenous sources, nonpituitary gonadotropin stim-
) t0 D1 s; L, y% pulation, and rare activating mutations.3 Virilizing1 ]) z& m3 \/ Z8 |( Y
congenital adrenal hyperplasia producing excessive4 ~+ E& B0 L/ l! o
adrenal androgens is a common cause of precocious( f) A0 p6 W8 A( R
puberty in boys.3,4
1 s8 g1 T; D; W# l5 u! n2 P! xThe most common form of congenital adrenal. C/ Z" _) H4 L6 G
hyperplasia is the 21-hydroxylase enzyme deficiency.
7 f8 F4 S! I# ]& EThe 11-β hydroxylase deficiency may also result in
9 T+ r; y0 s" A! i- U0 G9 ^  a- ?excessive adrenal androgen production, and rarely,! @, @" Z, m) q7 [& v) K
an adrenal tumor may also cause adrenal androgen- ~  F" p9 ~% {& _/ f
excess.1,3( K8 ?3 F/ X' @$ L
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" G& w9 H% H" g8 V
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
' U- g2 c  `0 o& d  @A unique entity of male-limited gonadotropin-
; S5 u- x+ n8 @7 m* Tindependent precocious puberty, which is also known* o  j) I# A8 w7 M7 Y
as testotoxicosis, may cause precocious puberty at a: ?% b  \7 O* J7 B: a
very young age. The physical findings in these boys
5 Z1 W/ g% W. p8 U  C) Ewith this disorder are full pubertal development,5 I2 @- L: Y' Y3 S
including bilateral testicular growth, similar to boys
! Y6 a! G: F' ~9 ?& L3 u# Fwith CPP. The gonadotropin levels in this disorder
- ]9 N0 L( @2 d1 _) qare suppressed to prepubertal levels and do not show
6 |1 C+ V% |, d8 x, |6 C5 tpubertal response of gonadotropin after gonadotropin-/ C1 y, j3 O  r) J
releasing hormone stimulation. This is a sex-linked
, U+ z+ v1 W& C8 U! v# ^autosomal dominant disorder that affects only
8 s& m0 O8 b/ Q' b3 z9 U" f7 Jmales; therefore, other male members of the family( h2 O) `5 o8 D5 z# U( y, y
may have similar precocious puberty.3
+ V. a, T  ?& f$ \2 P( B9 _In our patient, physical examination was incon-
8 i$ f  @  r7 W* Ssistent with true precocious puberty since his testi-- D3 k& {2 z8 s% \* J' {4 a
cles were prepubertal in size. However, testotoxicosis
& E% C+ {0 i. |: d6 Y2 Zwas in the differential diagnosis because his father
3 R! J. l8 r: u- _started puberty somewhat early, and occasionally,
1 `5 z2 Z1 D. E+ R& T. k! @testicular enlargement is not that evident in the$ }+ A6 v6 ^0 I! w
beginning of this process.1 In the absence of a neg-
; z$ U( O9 G, c% cative initial history of androgen exposure, our
, W5 R1 W4 x7 p" B- t: vbiggest concern was virilizing adrenal hyperplasia,
5 w5 j! `" @/ J* S) O/ D% Teither 21-hydroxylase deficiency or 11-β hydroxylase+ d& l1 W; i$ x* }
deficiency. Those diagnoses were excluded by find-' Q  `4 P! u' o& N2 p7 \
ing the normal level of adrenal steroids.
5 j, H8 V7 D3 h5 d( y- |4 RThe diagnosis of exogenous androgens was strongly
6 A) ]4 Y3 N0 u# vsuspected in a follow-up visit after 4 months because2 @# _! L" N) v4 q# l3 R, K
the physical examination revealed the complete disap-! S0 E/ H# |& Y9 p7 ?
pearance of pubic hair, normal growth velocity, and: J6 r# D5 D$ z0 J. T
decreased erections. The father admitted using a testos-" i' Y; W' a* [
terone gel, which he concealed at first visit. He was9 `$ M$ |/ r$ Q
using it rather frequently, twice a day. The Physicians’
3 b# m- f" Z2 q( BDesk Reference, or package insert of this product, gel or4 j& D3 Q' r1 |) A' F, b* U2 J& A+ ^
cream, cautions about dermal testosterone transfer to
& D2 ^8 d& m4 U. R6 u2 d9 ]+ dunprotected females through direct skin exposure.- c. b6 A3 [+ r; I
Serum testosterone level was found to be 2 times the' `6 x' [$ n. t# E
baseline value in those females who were exposed to
& i  q8 o  @( Seven 15 minutes of direct skin contact with their male6 n, s6 A, D; J4 Z3 d# w
partners.6 However, when a shirt covered the applica-
6 s# n+ q1 Z8 j  qtion site, this testosterone transfer was prevented.' m! t3 u+ }. i1 d: b" J7 i
Our patient’s testosterone level was 60 ng/mL,
! s1 z" Q2 C2 U/ Lwhich was clearly high. Some studies suggest that
  b- x: Z: ^0 W6 _4 {) e& \+ Ddermal conversion of testosterone to dihydrotestos-! W( ^7 ~' M" Z/ p# X5 f
terone, which is a more potent metabolite, is more/ ~, @! C" W: F; e5 ?
active in young children exposed to testosterone( E* O" a# S# d: Y7 b2 Z6 Y
exogenously7; however, we did not measure a dihy-& k9 h1 F$ x- j- y# P& @& L' O
drotestosterone level in our patient. In addition to" I$ n0 x! |$ M& l
virilization, exposure to exogenous testosterone in3 \% f, x- @+ g& T- o( }3 B) P( E; O
children results in an increase in growth velocity and
$ A9 t5 E: p% n: E- ^5 Padvanced bone age, as seen in our patient.
8 `8 h( ^0 G4 s+ U# o& w8 D9 n2 bThe long-term effect of androgen exposure during
8 `- S& W5 V& A$ f) ]$ Eearly childhood on pubertal development and final- z- D: R0 H8 ?" g+ v$ B+ K) ^' Z
adult height are not fully known and always remain( z/ f' ]& U: c& \$ f, K5 {1 P
a concern. Children treated with short-term testos-* [7 w3 p; q3 I9 u6 e
terone injection or topical androgen may exhibit some! X2 O3 \$ A! N7 z0 U  A" K
acceleration of the skeletal maturation; however, after
" Z3 g5 i/ O& d! p" tcessation of treatment, the rate of bone maturation
! h8 F" H, L! ]& odecelerates and gradually returns to normal.8,9
, A7 z& t% ^. T: @& h( h' pThere are conflicting reports and controversy
, x$ V6 l5 t) z# o9 \$ v9 q; w3 k( dover the effect of early androgen exposure on adult
4 V( P9 N& M" r, ~8 t# v( |penile length.10,11 Some reports suggest subnormal7 t; V9 o; n& S' \) k+ q, d
adult penile length, apparently because of downreg-% ?$ r% J- x1 v0 g5 ], @  a1 N* h: V
ulation of androgen receptor number.10,12 However,
7 O/ d' r  `$ k5 T$ lSutherland et al13 did not find a correlation between
5 C* n9 l. `$ A9 Y$ \2 R% c4 P0 b0 Nchildhood testosterone exposure and reduced adult7 ?  @/ s" F+ _$ U* g; P$ \$ F9 K7 U
penile length in clinical studies., o8 |+ J/ M1 P2 ^4 [
Nonetheless, we do not believe our patient is# I# D( r0 c6 q% }) l/ A" f# E
going to experience any of the untoward effects from
% O0 `$ C8 }" z% U1 R! }$ ktestosterone exposure as mentioned earlier because
" D& _. O9 K8 O7 f* o/ y# b+ Lthe exposure was not for a prolonged period of time.9 E, D; u  M1 k( H3 m9 U) k
Although the bone age was advanced at the time of) |" n. R5 T& a' w9 ]
diagnosis, the child had a normal growth velocity at
+ H; q( D; \% ^8 H( ^" u( Fthe follow-up visit. It is hoped that his final adult1 G# }* {$ V9 H) w# l
height will not be affected.5 I- [( G  a" W
Although rarely reported, the widespread avail-/ M/ H6 o' r1 I2 [) P; N" Y
ability of androgen products in our society may
9 f! D3 c! A# O1 V- `indeed cause more virilization in male or female  }8 l! A& v1 s
children than one would realize. Exposure to andro-
+ l& `" r! m) j" J2 rgen products must be considered and specific ques-
9 |$ M0 q" D* M1 C' r  e# g9 Ftioning about the use of a testosterone product or
9 C' [* M* J! egel should be asked of the family members during8 c3 V4 z% b8 Y! a) B
the evaluation of any children who present with vir-
* Q' I/ P3 \# `9 |& g) u+ rilization or peripheral precocious puberty. The diag-
* P  v: C1 \  nnosis can be established by just a few tests and by
8 U. q/ e" \! C. M, nappropriate history. The inability to obtain such a4 A, R4 t4 m: A4 |" N" z9 o1 `) Y8 Q
history, or failure to ask the specific questions, may
6 Z6 s0 @( O' a3 d$ G5 z1 iresult in extensive, unnecessary, and expensive
# ]6 ^, [; U& a4 }6 Rinvestigation. The primary care physician should be4 l; b# a0 @. N. l* ]- E2 n( v! ]5 ~
aware of this fact, because most of these children
5 L- s9 E( e; W9 ~% O* H2 umay initially present in their practice. The Physicians’
' _3 D  X6 I! _0 _+ \$ ZDesk Reference and package insert should also put a, N3 n: j& W2 ~9 M8 B
warning about the virilizing effect on a male or
' ^" z! C; u6 H( }. ~! Q& I$ W. sfemale child who might come in contact with some-% p! u! ^8 _8 P" a
one using any of these products.7 d1 H/ A# Z! U5 a
References
7 W9 s+ U- A: {/ i2 u7 }1. Styne DM. The testes: disorder of sexual differentiation
" p- t0 m6 [/ m/ h; `and puberty in the male. In: Sperling MA, ed. Pediatric/ r6 J! Z5 [. @
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;4 K# ^) T8 o* E/ y7 y! D$ U) c- O
2002: 565-628.  w7 M7 Y/ G9 @" [* x+ O0 ]% D  S" T
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
0 F8 t( B* G0 e; Z$ jpuberty in children with tumours of the suprasellar pineal
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精妙絕倫的精品,感謝啊!期待你更多更好的創作哦!
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