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is a significant concern for physicians. Central5 u( ?2 S5 G. S; X. {
precocious puberty (CPP), which is mediated2 h7 {# G& S0 J6 x6 \9 F$ E5 N
through the hypothalamic pituitary gonadal axis, has
3 o& `. P% x3 y- y8 ha higher incidence of organic central nervous system
`9 M6 ^ y) m' Klesions in boys.1,2 Virilization in boys, as manifested. Z, B/ T' p) k1 P& [* k
by enlargement of the penis, development of pubic9 |0 H& N3 S3 J* M' ~0 L
hair, and facial acne without enlargement of testi-( o6 B5 }; u7 a1 p
cles, suggests peripheral or pseudopuberty.1-3 We
1 ~- w% |: a2 s2 j4 m) s/ o" O# Y1 Kreport a 16-month-old boy who presented with the
' Z+ R' e a. R, benlargement of the phallus and pubic hair develop-5 D9 K% y9 ]$ ?" o1 i
ment without testicular enlargement, which was due( n7 C2 M2 s! T, V1 \) j& ^
to the unintentional exposure to androgen gel used by+ F4 B- A4 a& f. Q9 h1 @4 X. V
the father. The family initially concealed this infor-
' F9 f+ D/ B0 B2 Y0 Vmation, resulting in an extensive work-up for this
8 w2 v: ^# c6 ~; V6 fchild. Given the widespread and easy availability of
7 a; ^+ k% [, z b Itestosterone gel and cream, we believe this is proba-
0 X# [ V" t! S( }& |* Y7 _8 @bly more common than the rare case report in the W' d$ t6 V+ n6 H; s
literature.4
: @) L) l) s1 o3 c8 SPatient Report
1 `9 v2 z7 |) p! BA 16-month-old white child was referred to the
2 Q2 j5 ?0 [' u i! Qendocrine clinic by his pediatrician with the concern l* U1 `& ^2 ~4 C
of early sexual development. His mother noticed
( U" U- E/ q+ b; Zlight colored pubic hair development when he was
$ o: o; c) P' b9 H0 c* YFrom the 1Division of Pediatric Endocrinology, 2University of
2 \! v& T2 l8 a& X+ kSouth Alabama Medical Center, Mobile, Alabama.
5 ^9 {! T. D$ @6 w( |# B0 O; QAddress correspondence to: Samar K. Bhowmick, MD, FACE,
! Q- t! d9 }" U5 {! Z- C! aProfessor of Pediatrics, University of South Alabama, College of! {' Y9 ~8 p! `
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;0 E: O7 ^- k: V* o9 |9 J* n
e-mail: [email protected].
" u' V3 h* q) O, oabout 6 to 7 months old, which progressively became
4 K5 `6 }9 Y/ v" {. k: `0 }2 ~darker. She was also concerned about the enlarge-! v: a4 { r% b6 Z! @) m1 k& ]
ment of his penis and frequent erections. The child
9 P+ p% m- K' M' [" Twas the product of a full-term normal delivery, with4 R; W, H- o, m
a birth weight of 7 lb 14 oz, and birth length of; X% r; r8 E: D/ ?
20 inches. He was breast-fed throughout the first year! r4 |+ r' K5 Q T( [
of life and was still receiving breast milk along with1 I- f8 D% z8 {4 A1 S1 H% I6 ?2 A5 T
solid food. He had no hospitalizations or surgery,$ j8 v2 o: Y# \' g! S
and his psychosocial and psychomotor development9 q- n, ?( X$ @ t( o! D
was age appropriate.4 o3 Y$ ^) L M0 I3 J3 m
The family history was remarkable for the father,
, o9 X7 G) v' M1 Qwho was diagnosed with hypothyroidism at age 16,
( B5 v1 ^' ] Y7 q: ?$ y& Zwhich was treated with thyroxine. The father’s6 `7 s+ @: [- R3 f& e
height was 6 feet, and he went through a somewhat- r, b! q S% u0 D
early puberty and had stopped growing by age 14.- E9 ?# x4 r+ z7 B
The father denied taking any other medication. The
# R) W+ Q; L8 n- `9 d! echild’s mother was in good health. Her menarche n1 Q6 f# j- \6 L( W# p8 O' |
was at 11 years of age, and her height was at 5 feet
: B; k0 M* d) [4 t- i5 inches. There was no other family history of pre-
}9 y) [3 `6 w5 A$ `cocious sexual development in the first-degree rela-
' Y2 D. \1 ?2 H, k( ptives. There were no siblings.9 M# C- Z% d* J! M/ ?# H8 B
Physical Examination
5 e2 x' b- n+ S$ S; i# iThe physical examination revealed a very active,/ D+ c; u, a! [; ` z2 A/ W+ h+ O* f
playful, and healthy boy. The vital signs documented
( C( ?( r* s$ s1 q1 d1 C Ja blood pressure of 85/50 mm Hg, his length was6 X0 c( F2 Q$ R! F8 k
90 cm (>97th percentile), and his weight was 14.4 kg
) R1 q1 m# j' V+ x8 O(also >97th percentile). The observed yearly growth* }5 H; A# D! ^: _
velocity was 30 cm (12 inches). The examination of% m" z( X1 z# k- V4 K! z
the neck revealed no thyroid enlargement.
4 W: C! L# n( i3 ]/ n: RThe genitourinary examination was remarkable for
1 {( R/ |6 p! Yenlargement of the penis, with a stretched length of
" }# ^ D8 O3 T' n# B) c8 cm and a width of 2 cm. The glans penis was very well
7 [% }, @5 d; Z6 {/ q# edeveloped. The pubic hair was Tanner II, mostly around. p8 Z: G% _$ F4 R6 x8 E
540' U1 O0 q* u1 y5 s$ p! Q: R
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
6 ]% f9 \* ~: ^% `the base of the phallus and was dark and curled. The
0 j) O: |5 ~, \1 z6 x+ ^: p5 |testicular volume was prepubertal at 2 mL each.
# ]9 l3 R! Z; HThe skin was moist and smooth and somewhat
9 w! a0 \5 p- ^1 f0 doily. No axillary hair was noted. There were no* g0 E3 \4 \, r5 _) p5 f D
abnormal skin pigmentations or café-au-lait spots.
P2 R$ Q2 G& s; j) T* S5 n8 nNeurologic evaluation showed deep tendon reflex 2+2 l% {! u& e+ W4 L
bilateral and symmetrical. There was no suggestion
( f9 ]0 W5 r j X% g5 J7 Fof papilledema.
/ `2 N7 Q5 Z, G3 g, fLaboratory Evaluation
; t: Y- }# t g, x) R. ^The bone age was consistent with 28 months by
4 B! w: O4 O. Q# y/ ~! U. tusing the standard of Greulich and Pyle at a chrono-3 n- a d0 y! Z
logic age of 16 months (advanced).5 Chromosomal
8 C# z% Q* d3 p- `# n }4 Q' F- x6 wkaryotype was 46XY. The thyroid function test0 h- Y+ i6 P0 w0 O& [$ F$ E
showed a free T4 of 1.69 ng/dL, and thyroid stimu-5 M2 c1 l9 J# }) k5 }) l' z# c$ p
lating hormone level was 1.3 µIU/mL (both normal).6 J) B' g( o3 f6 [) k
The concentrations of serum electrolytes, blood! k- Q' q9 ^# j, u
urea nitrogen, creatinine, and calcium all were
6 B5 O& x8 d) ]within normal range for his age. The concentration: c' O# Y, u; I! Z" O
of serum 17-hydroxyprogesterone was 16 ng/dL
# {8 e" w: @2 t(normal, 3 to 90 ng/dL), androstenedione was 20
, W0 g |0 {7 G1 m& n+ Xng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-* F3 `6 m) M e
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
* q& y7 l, |: ^ x6 qdesoxycorticosterone was 4.3 ng/dL (normal, 7 to8 q9 L% ]* h9 E: x3 ?' J
49ng/dL), 11-desoxycortisol (specific compound S)
; _* p) c3 [6 s! e; [6 B( Lwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-; H5 ^9 D p$ j% W
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
3 p) g! N" g' u2 k/ z0 A3 mtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
. f9 q Z# N" c* hand β-human chorionic gonadotropin was less than8 {1 y) R# @+ Q, g
5 mIU/mL (normal <5 mIU/mL). Serum follicular1 @. y( ], d: x5 L
stimulating hormone and leuteinizing hormone
1 i ?5 r; n1 U# ^0 I& d I2 ?8 dconcentrations were less than 0.05 mIU/mL8 y7 \; H! H* i8 n$ l, v% |" ?* L
(prepubertal).
# H _2 n" k( W- n/ D a: |The parents were notified about the laboratory
9 N+ y/ K n: P3 `) [results and were informed that all of the tests were
3 _- j. R! i2 r. P; T4 Q, rnormal except the testosterone level was high. The/ k/ i- s+ J A9 q
follow-up visit was arranged within a few weeks to
, ]+ u0 T% l1 @. L j/ Oobtain testicular and abdominal sonograms; how-$ o; ?, F- I" N, {2 J4 K' h D7 O! J
ever, the family did not return for 4 months.
2 `- g6 F+ A' v2 fPhysical examination at this time revealed that the/ U; n) Z; n4 g) f0 Q' S
child had grown 2.5 cm in 4 months and had gained
/ U9 H# e* I' j# L0 F4 f5 k2 kg of weight. Physical examination remained
6 F: D& i# ^' d$ O- \unchanged. Surprisingly, the pubic hair almost com-
2 Y. j* c$ S6 e0 _9 I3 a* Mpletely disappeared except for a few vellous hairs at
$ z- h) }! v% ~, Kthe base of the phallus. Testicular volume was still 2
/ O# u" Y; y! D \4 wmL, and the size of the penis remained unchanged.: B8 c6 `$ I0 t" E* u, z. z: Q
The mother also said that the boy was no longer hav-
; d) C$ g# U) Z" Fing frequent erections.0 ?" A5 e+ U4 J( }$ }$ _8 Z
Both parents were again questioned about use of
% c: z8 V" Q/ g1 e& v/ Sany ointment/creams that they may have applied to
" J0 K/ D2 ?9 z8 I( J% l9 E hthe child’s skin. This time the father admitted the
: h2 J; z, b9 Q4 eTopical Testosterone Exposure / Bhowmick et al 541
0 k, U0 ?" Q; @# u' Buse of testosterone gel twice daily that he was apply-+ u1 s0 J1 |0 k1 V1 L, Z6 p" i$ x
ing over his own shoulders, chest, and back area for- C* A5 V j3 `: Q5 H* Y
a year. The father also revealed he was embarrassed( y" j0 k+ F; N$ z. G
to disclose that he was using a testosterone gel pre-9 _3 x. x) _; a( V
scribed by his family physician for decreased libido
; a# H m$ B$ M$ I( ?9 [5 rsecondary to depression.
4 k2 ^) h$ K) o- ~# A* vThe child slept in the same bed with parents.9 Z3 p+ P# _% c/ ^4 A2 \
The father would hug the baby and hold him on his
& c( ], H5 N$ ^9 [; m. w) dchest for a considerable period of time, causing sig-( x3 Q+ o! Q6 t' f# J
nificant bare skin contact between baby and father.
; \$ U* S- c+ F! EThe father also admitted that after the phone call,! u) O5 O) Q0 v3 Y3 n
when he learned the testosterone level in the baby0 }* K* g/ z! f# X0 w& { z1 {7 |
was high, he then read the product information
4 i; r7 F; t# Q0 |1 jpacket and concluded that it was most likely the rea-
' I0 w/ T7 l6 F! r1 }son for the child’s virilization. At that time, they! W) k5 A5 s4 X. {9 e
decided to put the baby in a separate bed, and the4 c* `1 [/ M9 @8 [
father was not hugging him with bare skin and had
! A: |9 _, E. J4 ubeen using protective clothing. A repeat testosterone
3 n2 H3 x# i3 }) q7 s5 ]test was ordered, but the family did not go to the
# s0 T9 Z! x; E" |) Ilaboratory to obtain the test.
) `! N* f& T9 PDiscussion; O' F2 Q+ L q3 @1 _: ?
Precocious puberty in boys is defined as secondary+ s+ S1 g6 a6 D* R# }6 q/ b* t& m
sexual development before 9 years of age.1,47 x$ _) |( M* S, k" I3 M+ [) U
Precocious puberty is termed as central (true) when
; a& C( e: X# v* K* U" fit is caused by the premature activation of hypo-. F+ |' ^1 ^' {: b3 i
thalamic pituitary gonadal axis. CPP is more com-/ B) g( e _7 k3 z5 x
mon in girls than in boys.1,3 Most boys with CPP
# ]1 s/ B; l& Z4 o, p, p9 ~may have a central nervous system lesion that is
8 ?7 b, ~, O4 v: d0 r4 Iresponsible for the early activation of the hypothal-" Z6 N& j+ X/ c
amic pituitary gonadal axis.1-3 Thus, greater empha-
9 |& U7 \# L; |# @: U% Ksis has been given to neuroradiologic imaging in) w6 K6 i. t; z
boys with precocious puberty. In addition to viril-
5 f/ {2 U+ Q* b! S8 Hization, the clinical hallmark of CPP is the symmet-! M$ g4 u* T$ P1 U L& d6 k. Q
rical testicular growth secondary to stimulation by' m# c) Y% c* Q) L* `
gonadotropins.1,3. |4 p8 F, B$ _; V/ R; H
Gonadotropin-independent peripheral preco-
/ e# H% @* \* n2 `! K2 k/ T3 vcious puberty in boys also results from inappropriate
1 W. G q+ Q% Mandrogenic stimulation from either endogenous or
% j3 ?1 B, H# G( x' h' z7 G9 Sexogenous sources, nonpituitary gonadotropin stim-
5 `" I. s, v# {/ r. U! X9 ~ulation, and rare activating mutations.3 Virilizing
, B" _3 D/ O0 W4 P: kcongenital adrenal hyperplasia producing excessive3 z* ~! Q$ k7 ~
adrenal androgens is a common cause of precocious+ e* ?) p- t7 K+ |( D$ S, x6 C
puberty in boys.3,4
' F' j( @ t/ J# Z. IThe most common form of congenital adrenal0 ^ w: `' I; f- R# }9 O
hyperplasia is the 21-hydroxylase enzyme deficiency.3 f0 H- c+ w! D6 _! C! o7 ?
The 11-β hydroxylase deficiency may also result in- X5 T" N+ k/ A
excessive adrenal androgen production, and rarely,3 i) U$ ]" P7 L6 B6 Z" S# r R! e; G
an adrenal tumor may also cause adrenal androgen
) ~) s/ n: P8 z; N7 }excess.1,3
( P% i8 c8 @) ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& ~6 K/ V b/ p! I7 ?2 z0 F- Z5 C542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
) O" _8 ?# L5 S6 PA unique entity of male-limited gonadotropin-) {3 g9 ^5 `. a K6 @9 G$ d
independent precocious puberty, which is also known/ W4 K! B0 m$ a3 W" l
as testotoxicosis, may cause precocious puberty at a
* h# J; {8 Q! d. ^2 xvery young age. The physical findings in these boys; R( b7 f0 b# r: _2 N0 `
with this disorder are full pubertal development,
7 t5 x9 L0 b8 Q3 U4 P4 @$ h4 cincluding bilateral testicular growth, similar to boys
% U, d, c5 g9 O3 s9 c9 Nwith CPP. The gonadotropin levels in this disorder2 |: ~% B5 g# M& S" ?2 x7 n
are suppressed to prepubertal levels and do not show
8 k/ }% o# q8 f- Y7 J! Tpubertal response of gonadotropin after gonadotropin-. R6 x( y9 b: U6 {9 z0 ^: z: [
releasing hormone stimulation. This is a sex-linked, r2 t% ^1 r# m- M; [
autosomal dominant disorder that affects only" f+ S" N1 `7 a' ]7 \& p. p
males; therefore, other male members of the family
1 Q/ _( K( u, n$ ~: L, k( L, amay have similar precocious puberty.32 k5 C0 d7 {, q3 j9 J7 z# m& Z. O* H
In our patient, physical examination was incon-- ~4 I+ Y3 \& Q: R0 j
sistent with true precocious puberty since his testi-, r# J! X2 m8 B
cles were prepubertal in size. However, testotoxicosis
, a$ ~$ g7 K2 ^- dwas in the differential diagnosis because his father- ]$ Q2 X9 J! x& G! \3 }
started puberty somewhat early, and occasionally,8 Y8 O2 I6 l, I: {! m5 H
testicular enlargement is not that evident in the
# v" Q4 w- v; a" D1 [! T5 h/ Fbeginning of this process.1 In the absence of a neg-7 ]6 F# q9 t2 f
ative initial history of androgen exposure, our
% i- @& f, I) ]2 j8 G2 Hbiggest concern was virilizing adrenal hyperplasia,
+ Y9 b7 p5 `1 I8 ~ r4 s: qeither 21-hydroxylase deficiency or 11-β hydroxylase3 X4 u# k# x$ ]; y
deficiency. Those diagnoses were excluded by find-* \. U0 y1 S' `. e
ing the normal level of adrenal steroids.
, _. _* T$ t1 z/ |+ sThe diagnosis of exogenous androgens was strongly
( y8 l2 m1 } S# v$ ]# u. G2 }7 i0 ksuspected in a follow-up visit after 4 months because
8 k) L. l0 G \0 z0 Q _the physical examination revealed the complete disap-& o1 t4 _1 g' T
pearance of pubic hair, normal growth velocity, and' ~. W4 [* y) r) p3 `% t
decreased erections. The father admitted using a testos-" h! @" Y4 X" {- d9 ~' B% P
terone gel, which he concealed at first visit. He was$ F) }* N! M; `0 ]
using it rather frequently, twice a day. The Physicians’
7 y7 M, G2 b' }6 k! Z& p6 [% PDesk Reference, or package insert of this product, gel or
* |1 R( z( }) vcream, cautions about dermal testosterone transfer to9 `7 W7 t" f4 r- @; K, r2 D
unprotected females through direct skin exposure.
4 W4 t. a0 |! `6 rSerum testosterone level was found to be 2 times the
; }* ]8 W3 l+ ~4 z9 B: L2 sbaseline value in those females who were exposed to' C: S0 x! ^) Q( G
even 15 minutes of direct skin contact with their male
- X; [2 s( K% |% w2 l5 L( [% T' [partners.6 However, when a shirt covered the applica- S! ^- D) Z& M2 O( t5 ]6 i9 o
tion site, this testosterone transfer was prevented." z$ l8 n- Z7 H
Our patient’s testosterone level was 60 ng/mL,8 j& J2 T3 P' x7 i& t. ]7 o
which was clearly high. Some studies suggest that# g$ ^$ k9 Y4 {. ^' W! S
dermal conversion of testosterone to dihydrotestos-
7 f0 d+ \' I# G! H+ Wterone, which is a more potent metabolite, is more
2 u: l) p: V' `$ ractive in young children exposed to testosterone
! ]& N. d0 `# M' n% O2 dexogenously7; however, we did not measure a dihy-1 e" s3 j* X* c0 \# q; v: U
drotestosterone level in our patient. In addition to
9 ^7 n, u8 G4 P Y Nvirilization, exposure to exogenous testosterone in7 `( V( k3 X5 C/ `
children results in an increase in growth velocity and
Z2 U& m3 c2 Y; `! dadvanced bone age, as seen in our patient.
' w, P6 h1 n$ {, o5 U: uThe long-term effect of androgen exposure during) a2 V% P; R) G8 h# |
early childhood on pubertal development and final, O3 S# `4 S% ]3 E; q( u
adult height are not fully known and always remain
) @: R3 w4 k$ {4 R+ na concern. Children treated with short-term testos-6 T" `& ?8 l" G% B. V1 ~6 R! Q
terone injection or topical androgen may exhibit some2 G* ]" }$ ^( Y* Y4 p, ? b: p9 B
acceleration of the skeletal maturation; however, after
) C2 C+ N6 V* `- Wcessation of treatment, the rate of bone maturation1 Q0 f( X1 H5 g- V8 g0 L% N
decelerates and gradually returns to normal.8,9
& z7 X, X0 N/ Q6 I% Q$ ~There are conflicting reports and controversy
! p7 o0 N/ j+ U5 [: l H- a! @. iover the effect of early androgen exposure on adult. `+ I# Z7 v0 D" ?$ z7 s) E
penile length.10,11 Some reports suggest subnormal. M- }3 ]5 ^0 `8 B
adult penile length, apparently because of downreg-
7 e8 U+ t. E& G/ j L- n5 \5 g1 @ulation of androgen receptor number.10,12 However,
* N( L. g* ? u7 \$ ESutherland et al13 did not find a correlation between
7 j3 e4 a4 O" W, achildhood testosterone exposure and reduced adult9 c* H! \6 K7 R" g% C
penile length in clinical studies.5 H0 l/ B' N8 G! s, }
Nonetheless, we do not believe our patient is! E$ e3 q+ A; e- V6 T' B6 Z8 U8 v
going to experience any of the untoward effects from
1 ~+ Q7 |1 A7 D! Rtestosterone exposure as mentioned earlier because1 t2 C* [# |7 l/ b& {/ x
the exposure was not for a prolonged period of time." s+ {4 Z" z- C! m# w3 g7 P
Although the bone age was advanced at the time of
3 W4 }' o) h0 K' n5 i& a w5 Ndiagnosis, the child had a normal growth velocity at! M3 P+ n- O: d E t, n
the follow-up visit. It is hoped that his final adult; `0 [2 v7 m% \) B+ {% A" ]/ j, |# ?
height will not be affected.
0 H' p+ H$ Y% o$ C: q/ PAlthough rarely reported, the widespread avail-
$ z+ m: j6 M$ g7 e$ i. `6 lability of androgen products in our society may
5 |0 R! s( a( H& I) R& xindeed cause more virilization in male or female( t+ [- Q) N3 s9 K5 { s" h
children than one would realize. Exposure to andro-
+ R2 p x! N; H8 ^+ ogen products must be considered and specific ques-2 _/ I) s6 p6 h. X+ w" V |
tioning about the use of a testosterone product or9 O# h- U- ?2 {
gel should be asked of the family members during& I* u, ]0 K/ G- I' v# P
the evaluation of any children who present with vir-
& Q r) w) R* a/ filization or peripheral precocious puberty. The diag-
% T; E, z, W8 j# W3 _) Y3 N0 l& Ynosis can be established by just a few tests and by. C8 e; x# k* K; q! o1 p
appropriate history. The inability to obtain such a
) B- K8 v" O. V, Zhistory, or failure to ask the specific questions, may6 ^9 E+ a) C P
result in extensive, unnecessary, and expensive
* f4 w& C6 ~/ Y* K6 T x. ainvestigation. The primary care physician should be
* A" q" {6 J1 _7 Zaware of this fact, because most of these children* _* ?1 ~! N' X' I# ^
may initially present in their practice. The Physicians’0 n/ H0 [' s7 F1 W( O# G& j
Desk Reference and package insert should also put a
7 Y" k( I" F# b% p4 T6 Pwarning about the virilizing effect on a male or3 s- n: K& X8 `' s; E$ l2 f
female child who might come in contact with some-
) q! D( }- g+ d3 f; D2 T) None using any of these products.
2 _+ T) K( ~( _: D' x8 kReferences5 J0 U# Z3 }, @9 }9 P
1. Styne DM. The testes: disorder of sexual differentiation: Z/ T0 V. k# _( ?+ V0 k
and puberty in the male. In: Sperling MA, ed. Pediatric" u& b) g0 N, P4 q7 v1 Y8 b
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;2 R1 B9 F/ l# P* J" ]! @
2002: 565-628.) {/ I" m, d+ P' Z
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
2 x& i3 {+ Y1 Q- a4 s4 B: m; _- Ppuberty in children with tumours of the suprasellar pineal
* T5 q* U. _6 j6 j. rat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ A2 Z# z' B! B9 B6 N4 UTopical Testosterone Exposure / Bhowmick et al 543
7 l# ` E0 o6 {, d( Uareas: organic central precocious puberty. Acta Paediatr.8 k5 z8 [& F! Q9 ]$ D
2001;90:751-756.
. r, |. o" H0 M8 @* g3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.1 {2 [* O. g1 @1 P
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
7 I8 a: J& l" x' k/ YDekker Inc; 2003:211-238.
+ B* `# n5 f/ z6 y# H$ a4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual a d( G* A K+ w5 w3 y' h- `" O
development in a two-year-old boy induced by topical
) @6 ]* x* b& ]* b8 nexposure to testosterone. Pediatrics. 1999;104:e23.
, f+ Z8 c2 {0 w5. Greulich WW, Pyle SI, eds. Radiographic Atlas of8 E! G& L1 n' P! ^$ u
Skeletal Development of the Hand and Wrist. 2nd ed.
3 m1 e# }( P) T/ {Stanford, CA: Stanford University Press; 1959./ G1 K1 y& [2 y; @4 h
6. Physicians’ Desk Reference. Androgel 1% testosterone,
" X( ^" H8 a* F5 l8 @; r: aUnimed Pharmaceutical Inc. Montvale, NJ: Medical; r1 B5 P0 C! V3 M8 k$ R( E
Economics Company, Inc; 2004:3239-3241.
7 K) }# F7 W; U& D7. Klugo RC, Cerny JC. Response of micropenis to topical
R4 D5 y9 w1 {8 E# w3 D) v4 I6 ]# b. Ltestosterone and gonadotropin. J Urol. 1978;119:
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