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is a significant concern for physicians. Central H% G0 y$ z2 i
precocious puberty (CPP), which is mediated
# e: b: @' [: l4 Nthrough the hypothalamic pituitary gonadal axis, has- x$ e/ l" B5 l5 u
a higher incidence of organic central nervous system
2 i( U- g2 [) f1 ?4 K9 t$ b. Zlesions in boys.1,2 Virilization in boys, as manifested
4 S$ t/ g' k! r( D, \( S/ Z" Yby enlargement of the penis, development of pubic5 c4 U3 V6 O5 T, r7 g5 Y: Y3 i
hair, and facial acne without enlargement of testi-- u9 W- S4 g# q) l' k, w% Y
cles, suggests peripheral or pseudopuberty.1-3 We
- t- S8 H: O. N0 i4 }8 @" d3 }report a 16-month-old boy who presented with the6 e7 O3 V, w" P
enlargement of the phallus and pubic hair develop-+ W4 z" m$ }, H% c
ment without testicular enlargement, which was due
- ?: L! U, P7 N2 n/ Z) `! _1 pto the unintentional exposure to androgen gel used by
) K+ s1 X% l6 ~9 ] i6 T/ k+ Wthe father. The family initially concealed this infor-$ c3 `( B) H$ {1 `
mation, resulting in an extensive work-up for this2 ?. p }! @; g: r, L- s* D
child. Given the widespread and easy availability of
- S2 t3 h7 d. V+ }( C. Z2 c: C* Btestosterone gel and cream, we believe this is proba-7 z+ ~! @/ x* ^, h" _1 M# t
bly more common than the rare case report in the A; l6 ] y; q9 l( x+ q! ] I. W
literature.4
6 Q# \! u/ o, J4 I* @Patient Report
+ p7 a% h Q; f/ Y/ O: t+ oA 16-month-old white child was referred to the, t5 B/ p( h. o8 {. Q
endocrine clinic by his pediatrician with the concern/ k2 G. ^! Q5 P0 S7 i9 S% o& M
of early sexual development. His mother noticed
6 s/ c" x8 @( Q e6 A! Ilight colored pubic hair development when he was* B5 G& _7 E+ Q2 x1 ^& _9 v
From the 1Division of Pediatric Endocrinology, 2University of
- Q* ]8 Y. d7 R9 K% TSouth Alabama Medical Center, Mobile, Alabama.; h; p1 X8 G3 @( I/ V
Address correspondence to: Samar K. Bhowmick, MD, FACE,
. S4 q O! B3 ]$ I ^Professor of Pediatrics, University of South Alabama, College of
9 M: D' z% H7 kMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( P! n4 K) l8 o+ R
e-mail: [email protected].
. ~; h9 }% X* z1 ?- i* c+ A) \about 6 to 7 months old, which progressively became
/ m( u9 o' b/ l) ^5 {# b; [: H2 vdarker. She was also concerned about the enlarge-1 r. y( R, Q! f' _+ ?# L0 O
ment of his penis and frequent erections. The child
: q& d- s0 t' ~ Z3 v9 Ywas the product of a full-term normal delivery, with% D& S0 N( i2 K# i% i0 K8 v
a birth weight of 7 lb 14 oz, and birth length of; N/ K4 Y/ G# T7 z
20 inches. He was breast-fed throughout the first year
! M- u& h+ ?/ q/ V% e% p/ p6 Yof life and was still receiving breast milk along with
9 w& O0 v0 |* a2 U, tsolid food. He had no hospitalizations or surgery,
1 Q; j9 e# _9 M! t) L8 I2 T' {and his psychosocial and psychomotor development& n. ~9 D5 D; D, A; L
was age appropriate.4 p0 M! Y; i9 e
The family history was remarkable for the father,
& S3 |# I" _! Cwho was diagnosed with hypothyroidism at age 16,
2 A/ I, U" @) H. l, ywhich was treated with thyroxine. The father’s# Q) q4 I" w9 B
height was 6 feet, and he went through a somewhat
; e# W9 t5 R% G) I; e9 E; jearly puberty and had stopped growing by age 14.
* U/ y# ?& P5 C* Y) |The father denied taking any other medication. The) |$ O2 p1 \9 a; l) A
child’s mother was in good health. Her menarche
, O9 l) r, `, y4 `: F5 \was at 11 years of age, and her height was at 5 feet
3 R* H% _1 |& j; D* j" R5 inches. There was no other family history of pre- Q# O& z! W8 z
cocious sexual development in the first-degree rela-4 R) c3 L* m3 T- @9 R: H& v2 N ~
tives. There were no siblings.
6 Q- R5 }5 x$ p: k6 B) u7 vPhysical Examination
X0 n' U# @3 H2 I& ]The physical examination revealed a very active,1 V% R% _8 B# m% @* p: o, h% M
playful, and healthy boy. The vital signs documented9 t) x' ]$ @/ o
a blood pressure of 85/50 mm Hg, his length was) p8 X2 X: [1 O* E8 M
90 cm (>97th percentile), and his weight was 14.4 kg
2 X, }' I( c' S+ V9 q$ `(also >97th percentile). The observed yearly growth/ L9 d% Q; M! i+ O
velocity was 30 cm (12 inches). The examination of+ m! ?/ D( f' `" {& k1 g
the neck revealed no thyroid enlargement.9 A# u# ^- `+ s n
The genitourinary examination was remarkable for6 ~) m& n1 f0 x% A! j
enlargement of the penis, with a stretched length of
" n/ _, U, e! ?# c8 cm and a width of 2 cm. The glans penis was very well0 z$ L- m6 @0 x* _; H
developed. The pubic hair was Tanner II, mostly around4 i; g/ f0 Z; E5 `/ R+ ^5 L' m5 ]
540* _( \0 {8 S3 I
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
3 @ h/ v+ X+ L9 v2 K! gthe base of the phallus and was dark and curled. The: l* B- A/ U! C3 u j. Z4 H! \
testicular volume was prepubertal at 2 mL each.
2 A: W/ g0 \6 ^4 R5 k) Y; X bThe skin was moist and smooth and somewhat
. M: }( _, o8 ^1 [7 [1 Soily. No axillary hair was noted. There were no
' e' A/ x$ \6 j' @2 V; }abnormal skin pigmentations or café-au-lait spots.6 E4 Y4 T; j! c8 P$ z
Neurologic evaluation showed deep tendon reflex 2+8 m, Z$ g. N) \" P
bilateral and symmetrical. There was no suggestion
' ], I" }( O4 Y) r3 Qof papilledema.
1 F9 ?" d2 O2 B. R& @Laboratory Evaluation
/ q) G& i8 A5 i! U1 N7 t& D8 PThe bone age was consistent with 28 months by* k3 K/ S$ w5 V$ X; i; J* I. r
using the standard of Greulich and Pyle at a chrono-1 }8 A# h3 J T( ^
logic age of 16 months (advanced).5 Chromosomal
5 t+ H4 G$ y/ s, ?4 e# |* vkaryotype was 46XY. The thyroid function test
% v! [/ x* ]7 N& E( [showed a free T4 of 1.69 ng/dL, and thyroid stimu-6 i2 v$ h. ]( b
lating hormone level was 1.3 µIU/mL (both normal).
5 x/ B/ n9 o& S! SThe concentrations of serum electrolytes, blood" e4 ] m7 H; F
urea nitrogen, creatinine, and calcium all were
4 o. e) ^7 s- q* b+ cwithin normal range for his age. The concentration" u8 D" F4 y; c, |, B, g: Q
of serum 17-hydroxyprogesterone was 16 ng/dL
- Z- i _. `- d8 [# l2 B1 Q(normal, 3 to 90 ng/dL), androstenedione was 20
' v$ {3 h$ ]. J0 xng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-* F# `* ?/ X: J: X: D6 y, M9 E. K
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
; \$ p7 L. R& E+ O4 N, u- |! Mdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
- t) j1 N; {' f49ng/dL), 11-desoxycortisol (specific compound S)
8 |& ^9 M6 [# p: P* Rwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-0 A' k0 y2 t4 R+ T+ Q
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total" q; w. E; U9 _2 A/ j( U2 R& q# I& N
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
0 t O: S& Q5 Y- h8 m" Jand β-human chorionic gonadotropin was less than0 J+ z/ m! D2 e8 G' x- z; s$ R
5 mIU/mL (normal <5 mIU/mL). Serum follicular
/ C ^7 f/ S6 I. _! P s/ F% Ustimulating hormone and leuteinizing hormone* m) Z, i8 u+ ]9 }
concentrations were less than 0.05 mIU/mL K2 D3 C1 r: M; U; c
(prepubertal).
' k1 Z Z1 P# n, Z, HThe parents were notified about the laboratory
' X1 ?. `- x/ R5 J2 }2 X* U0 Rresults and were informed that all of the tests were
) q- h$ q% ~% Hnormal except the testosterone level was high. The; D% a5 S* k( |8 f" l1 i" o
follow-up visit was arranged within a few weeks to
! E+ \# `0 {1 o/ l1 t1 Eobtain testicular and abdominal sonograms; how-
3 C+ _4 W% }4 a1 g) dever, the family did not return for 4 months.( ?; {+ w) e7 m( A/ C
Physical examination at this time revealed that the3 d( M8 p, H k8 @
child had grown 2.5 cm in 4 months and had gained
' O% A$ {1 w/ e! Z2 kg of weight. Physical examination remained/ O0 R' c, e) T6 V9 X6 G( r" K
unchanged. Surprisingly, the pubic hair almost com-* Y5 |' a4 B- {' a
pletely disappeared except for a few vellous hairs at
; t% V& k. Z% G5 F8 u/ X3 V0 kthe base of the phallus. Testicular volume was still 2/ j# c+ @, X1 |8 H( S! ~. j8 R
mL, and the size of the penis remained unchanged.
4 a# A. @3 }/ \The mother also said that the boy was no longer hav-
% n: a; V/ X3 ^+ ~7 ding frequent erections. X$ c2 E4 q/ Q+ p$ h
Both parents were again questioned about use of
Q# y. y0 a0 O8 G8 j, I# o3 o# oany ointment/creams that they may have applied to# t5 d( m9 L5 m: S" H3 [2 o$ B. X+ `
the child’s skin. This time the father admitted the
% W( S, H2 y0 c! L1 k/ o/ N7 _Topical Testosterone Exposure / Bhowmick et al 541
9 U. {6 ?, o! T. e5 Buse of testosterone gel twice daily that he was apply-$ \/ V* J2 r) l5 S- ^: ]
ing over his own shoulders, chest, and back area for
0 U$ `! D+ p# e& [. C$ n* Fa year. The father also revealed he was embarrassed) E n$ `5 P' L6 S; _6 A6 t2 {0 I0 D, h
to disclose that he was using a testosterone gel pre-
* \. d: b9 e! p2 [- k6 qscribed by his family physician for decreased libido
7 b: s9 _9 T% s2 H" A! S5 u8 [secondary to depression.
) `& I; b4 c5 I0 eThe child slept in the same bed with parents.7 m* X l+ M9 L1 _* Q d
The father would hug the baby and hold him on his5 k. b1 a; i# A( V) p7 X1 _
chest for a considerable period of time, causing sig-9 n7 k2 O: g" a3 w
nificant bare skin contact between baby and father.
" u y. b0 @3 v: gThe father also admitted that after the phone call,
# \7 D3 x W: q, A. T% Z8 Z# C mwhen he learned the testosterone level in the baby
0 j! O6 o0 B3 b& M+ I/ {was high, he then read the product information
$ |7 d& `* G$ ^5 Cpacket and concluded that it was most likely the rea-
- ]' Y2 s2 m" h: X) Z1 m$ Sson for the child’s virilization. At that time, they
3 `; G1 Q, u$ _9 {9 G( tdecided to put the baby in a separate bed, and the0 Z5 m3 E: h% y
father was not hugging him with bare skin and had
) |9 E+ E! t+ Y; \5 Z) R+ a/ ^been using protective clothing. A repeat testosterone& @3 Q6 c5 c$ h+ W6 z! R# t5 ~, |
test was ordered, but the family did not go to the
4 U, h5 H2 ^) K @laboratory to obtain the test.0 q. h* H# H, D
Discussion
4 I8 x* ]2 [# _8 }/ y& B2 G+ EPrecocious puberty in boys is defined as secondary
0 V4 V3 P( \" q4 q) \9 Dsexual development before 9 years of age.1,47 P$ I# X7 ^1 R* B, N0 w9 t5 Q$ F- G
Precocious puberty is termed as central (true) when
, p( g6 Q4 f8 x7 p3 e- h, T: q/ @it is caused by the premature activation of hypo-! f! l1 f7 N# v( ]: H, _, g
thalamic pituitary gonadal axis. CPP is more com-7 }2 b+ ~3 ~1 Y& } }: G4 B5 I
mon in girls than in boys.1,3 Most boys with CPP' o ?0 J0 d! {& L
may have a central nervous system lesion that is+ \+ v: [0 D- t) o" U7 D
responsible for the early activation of the hypothal-/ s- e* R6 ^+ p1 M6 y
amic pituitary gonadal axis.1-3 Thus, greater empha-
1 v- Q- i! ?1 Q1 n3 C( f5 Q) Qsis has been given to neuroradiologic imaging in
) h0 F3 V9 A; p3 x9 Sboys with precocious puberty. In addition to viril-% f; C( k: Y- {9 E; M' m
ization, the clinical hallmark of CPP is the symmet-
/ q g+ }1 T, M' j: k# g7 t0 Frical testicular growth secondary to stimulation by
+ ^! n0 y+ I" j) igonadotropins.1,3* ]- ?% k5 s2 P V, b* X
Gonadotropin-independent peripheral preco-1 v8 _8 G9 @: z1 o6 F3 G6 _$ a; y
cious puberty in boys also results from inappropriate
3 o, e- A9 w, I5 Randrogenic stimulation from either endogenous or
4 m/ H/ v; S9 b- d. I* rexogenous sources, nonpituitary gonadotropin stim-
' @ }8 b- Y* I5 C( }ulation, and rare activating mutations.3 Virilizing
" y' O0 d7 c+ ]5 [ U4 _congenital adrenal hyperplasia producing excessive
& F6 m o; m/ Z, b8 c! Hadrenal androgens is a common cause of precocious3 V% V' T" e! ]' q/ w6 q/ N
puberty in boys.3,4
% r+ `$ ]( z. `0 \3 C. O( L) [+ l4 iThe most common form of congenital adrenal3 P. d1 |+ _- D( D& w+ u$ k3 ]4 o
hyperplasia is the 21-hydroxylase enzyme deficiency.# [2 J% o. _# u6 @0 m- W) B* O. o. O
The 11-β hydroxylase deficiency may also result in0 C' G7 V3 g+ {- p5 [+ Q; s
excessive adrenal androgen production, and rarely,- G4 o' W0 y% f+ Z2 [+ u- B
an adrenal tumor may also cause adrenal androgen
) b! [) [) L# wexcess.1,3
1 Z* J. d: b% O: `+ j, hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
( e0 [4 H. ?7 i3 h5 V- T542 Clinical Pediatrics / Vol. 46, No. 6, July 20077 i5 ?1 E% O& {/ Z! |2 V* j) e0 _. M
A unique entity of male-limited gonadotropin-
7 X+ w4 K$ B. t* j2 G$ R& M+ lindependent precocious puberty, which is also known
# v& G9 p: \8 d& das testotoxicosis, may cause precocious puberty at a
1 v1 b ]2 W" z( d V/ Z$ vvery young age. The physical findings in these boys7 Y. z, M- C- J, h- H; b5 R# o* G
with this disorder are full pubertal development,
" C" i& G9 w; C' i" \' h- Qincluding bilateral testicular growth, similar to boys
d- t/ J4 v1 f9 X1 [with CPP. The gonadotropin levels in this disorder
' @7 D$ c/ [# p O ?6 z- eare suppressed to prepubertal levels and do not show8 C# N6 F0 U5 g# i6 ~
pubertal response of gonadotropin after gonadotropin-9 d# U2 e. R$ [8 _" T
releasing hormone stimulation. This is a sex-linked
" f% x2 n$ f5 C8 z' ^autosomal dominant disorder that affects only: A# x7 Y: g2 ^7 b0 r j3 p
males; therefore, other male members of the family, S% N3 @6 I9 }9 y) J
may have similar precocious puberty.3
: T2 b% f- g! R! i: B6 iIn our patient, physical examination was incon-: v6 q4 S, @# j' ^2 I5 g
sistent with true precocious puberty since his testi-
& P4 g7 H4 W# i6 ~cles were prepubertal in size. However, testotoxicosis
' b1 y, \8 v$ F8 \was in the differential diagnosis because his father+ u5 f( E: x% S& p
started puberty somewhat early, and occasionally,
8 l, R/ X% G' @2 qtesticular enlargement is not that evident in the
3 m S3 O- g8 F; ?beginning of this process.1 In the absence of a neg-
1 Y& }8 l; s: ]/ ~ K; gative initial history of androgen exposure, our# I- ~/ I- F. z$ p. B
biggest concern was virilizing adrenal hyperplasia,
# m; m, Y0 p3 a7 |& R6 J/ K0 i4 deither 21-hydroxylase deficiency or 11-β hydroxylase
4 Q9 j! e4 W+ G2 [4 Fdeficiency. Those diagnoses were excluded by find-: X2 ~# u( P% ^- m/ e6 |
ing the normal level of adrenal steroids.- M8 j1 @ D3 p3 } L( ^' ^* D$ W; A U- a
The diagnosis of exogenous androgens was strongly
: |3 n' O4 ?% `; O4 f* ~' [suspected in a follow-up visit after 4 months because
2 O2 o6 o# m% ^& U2 [the physical examination revealed the complete disap-
; j6 o# }% z4 kpearance of pubic hair, normal growth velocity, and# W. X- q1 P" u$ I D5 Q
decreased erections. The father admitted using a testos-
\ y# F8 n \9 iterone gel, which he concealed at first visit. He was2 e* C5 s- |4 O( X" R g
using it rather frequently, twice a day. The Physicians’
2 B. N+ d6 E5 N' vDesk Reference, or package insert of this product, gel or6 R! l1 E& ^% x0 r% v5 R6 @
cream, cautions about dermal testosterone transfer to
+ v- j( ?. v8 _" m! h% Qunprotected females through direct skin exposure.
* S' ^+ A! [9 _0 K' JSerum testosterone level was found to be 2 times the
/ i% K! G+ D; {baseline value in those females who were exposed to3 z9 s) u+ {( A
even 15 minutes of direct skin contact with their male
: }1 M# O0 G1 l$ T Kpartners.6 However, when a shirt covered the applica-
9 W* ^; V6 e# @1 A& K9 Wtion site, this testosterone transfer was prevented.
+ N8 r. ?) n0 d' J1 aOur patient’s testosterone level was 60 ng/mL,
+ B$ ~/ w6 K* Q! u, K! Q# S7 Dwhich was clearly high. Some studies suggest that
% F6 K8 f: P' E( |4 u, `dermal conversion of testosterone to dihydrotestos-( N$ x/ }* ~8 h
terone, which is a more potent metabolite, is more
* d9 d- \8 C3 w* D* t+ E0 f4 kactive in young children exposed to testosterone
" V; M: z" z9 A* dexogenously7; however, we did not measure a dihy-
% {0 p2 r3 K) I& ^- f* |! ddrotestosterone level in our patient. In addition to$ z) X0 X6 Z4 m+ c+ H, B4 j
virilization, exposure to exogenous testosterone in! P2 B, [: P! m; r
children results in an increase in growth velocity and, h) g8 P# p8 j
advanced bone age, as seen in our patient.
' ~( H4 s9 j; Z6 O2 FThe long-term effect of androgen exposure during
$ n) w1 Q# N" T2 u% F) e6 @early childhood on pubertal development and final5 c- {7 A( }; a) ]& ~& }
adult height are not fully known and always remain
. s1 [, M6 k6 ea concern. Children treated with short-term testos-
8 n/ \4 o( x- _7 S6 ^* i; cterone injection or topical androgen may exhibit some
$ F5 ]0 N* B8 m/ U7 Macceleration of the skeletal maturation; however, after' |& V6 b/ J+ \& D
cessation of treatment, the rate of bone maturation
% `0 y( _; {2 ~1 d/ e* M5 Fdecelerates and gradually returns to normal.8,9; C) R1 f0 o1 {9 w8 G; t
There are conflicting reports and controversy6 U/ ]$ N+ J9 b, `3 {3 S0 A
over the effect of early androgen exposure on adult: l- C9 ?' y6 e( X6 o
penile length.10,11 Some reports suggest subnormal
; b, E8 }! |+ g1 c$ iadult penile length, apparently because of downreg-; u' o# o2 H- C; y5 H* ?( {
ulation of androgen receptor number.10,12 However,( i' S% p- S2 J8 W" O
Sutherland et al13 did not find a correlation between1 K( P, H+ {- v3 E
childhood testosterone exposure and reduced adult* ~9 h) Z; O- g1 M$ H! |( s
penile length in clinical studies.4 p; }5 r# f9 T" o" J
Nonetheless, we do not believe our patient is7 t$ g7 [8 z5 A' V
going to experience any of the untoward effects from
( A/ {# e/ b) f3 }3 g8 Z0 z. ttestosterone exposure as mentioned earlier because
; g& F3 U. d! t2 n$ a* \, A/ ithe exposure was not for a prolonged period of time.
* E7 P c5 @5 b0 E9 A1 {2 DAlthough the bone age was advanced at the time of
3 e6 H9 M5 S3 Q( J$ xdiagnosis, the child had a normal growth velocity at' X, w3 t# W3 m
the follow-up visit. It is hoped that his final adult' J/ E% i- K. f! o) l/ D/ R
height will not be affected.: c- x- J3 H/ J8 r
Although rarely reported, the widespread avail-" W4 L1 r { u2 S4 w6 |
ability of androgen products in our society may
0 P* L+ N" X$ A; Pindeed cause more virilization in male or female
8 B+ s v: l& x1 M6 L( }+ vchildren than one would realize. Exposure to andro-3 |" r7 \& b! o/ ]
gen products must be considered and specific ques-: p- F9 W2 k+ K+ K
tioning about the use of a testosterone product or
) \2 P' w# e( B) k j/ A0 I( Dgel should be asked of the family members during
7 P( I! }! X& Y# E# v/ t3 U* ?! vthe evaluation of any children who present with vir-6 r& _5 m5 w. i' k# L6 f l
ilization or peripheral precocious puberty. The diag-5 Y2 y# W1 x9 q) k5 {
nosis can be established by just a few tests and by% H/ D( e6 y6 n$ x2 V4 ^
appropriate history. The inability to obtain such a9 n6 j% i. p; Y0 W
history, or failure to ask the specific questions, may
5 l, u# _6 e' k- E6 Tresult in extensive, unnecessary, and expensive
8 x9 o$ z/ q; J/ X( |, D) uinvestigation. The primary care physician should be2 C% z& p4 `( U
aware of this fact, because most of these children E$ K! z" `) c; Q! r: v0 V
may initially present in their practice. The Physicians’
! i! u& j, `& E) \- w* ?- MDesk Reference and package insert should also put a0 u5 F3 c2 }% P9 g" |
warning about the virilizing effect on a male or
+ [9 F; @8 A* B# [- yfemale child who might come in contact with some-
' p8 Y/ n* h, ?: E7 |' H/ vone using any of these products.
& N4 o- m, f2 e" XReferences- k2 y+ L. k: u7 o9 o: {
1. Styne DM. The testes: disorder of sexual differentiation0 V6 e7 V) P# O; g' {# ^: l3 k. s4 ^6 k
and puberty in the male. In: Sperling MA, ed. Pediatric
8 r: C7 t3 \9 T# v# L& Q, ?; QEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;) w3 n: r' V+ r9 J/ \7 V2 H
2002: 565-628.
: s. F7 `( @# X. b& a2 D2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious! M& K" R+ I" J
puberty in children with tumours of the suprasellar pineal" b- G2 x+ d% b( ?4 d: j. ]
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- j' E, G7 p4 p: C& W0 O" W% ^Topical Testosterone Exposure / Bhowmick et al 5438 @7 d9 k$ r5 }7 i# r+ C, P8 s
areas: organic central precocious puberty. Acta Paediatr.
" \' ?8 [6 c' I2001;90:751-756.
) a# g& V+ H- `2 M0 G7 f3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.; p$ K& r, |; [) {7 w
Pediatric Endocrinology. 4th ed. New York, NY: Marcel8 M, T; [. W, Z i, d! o$ @5 a
Dekker Inc; 2003:211-238.
* t3 f) L5 n( b4 A2 ?0 n! n3 E/ g4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual9 I" L; A. S7 u' S( H& [! U
development in a two-year-old boy induced by topical
% u. S3 U# ^% A7 y" g) {6 d" Fexposure to testosterone. Pediatrics. 1999;104:e23.( S. g; X% F' ^$ z9 I, Q
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
s. G& }% b* DSkeletal Development of the Hand and Wrist. 2nd ed.
4 P) x! m9 ~! H+ EStanford, CA: Stanford University Press; 1959.! _% h& W) s& T9 M* v
6. Physicians’ Desk Reference. Androgel 1% testosterone,
$ F* S1 Z* U U, ~; t( I# a/ D; bUnimed Pharmaceutical Inc. Montvale, NJ: Medical
: b2 [6 y" m; S9 \5 `Economics Company, Inc; 2004:3239-3241.* E3 } D4 j% o u9 j7 X
7. Klugo RC, Cerny JC. Response of micropenis to topical
6 t4 h7 A3 v( D1 q) h2 L0 ]# etestosterone and gonadotropin. J Urol. 1978;119:( g$ E! C- s: C; D/ ?8 s
667-668.
( f6 W: T: T0 [8 t. [+ [8. Guthrie RD, Smith DW, Graham CB. Testosterone
W+ B- g( r/ v: }: |9 [4 Gtreatment for micropenis during early childhood. J Pediatr.
; {1 |. t, a. T7 N+ ~1973;83:247-252.( q( X0 {7 M1 t L
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone# U( G3 k. O/ h; @
therapy for penile growth. Urol. 1975;6:708-710.+ h9 k2 O& c: Z% ~% H0 C* D! x0 |
10. Husmann DA, Cain MP. Microphallus: eventual phallic
8 k( I. J; ~; \/ {% csize is dependent on the timing of androgen administra-
9 ]$ J( S, c* a3 ?4 X- k j8 \+ F ^tion. J Urol. 1994;152:734-739., ?; W' f9 _! P7 Z. F. I
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
, ]0 R0 C* C! s4 K' Jdoes early treatment with testosterone do more harm+ P7 U* O0 \- d0 F- e% g J z
than good? J Urol. 1995;154:825-829.( M. `( W1 }. I+ D H
12. Takane KK, George FW, Wilson JD. Androgen receptor" @- Z- e0 K2 a9 ^4 K$ J
of rat penis is down-regulated by androgen. Am J Physiol.
& ]9 k( M% M! B% D% }5 V- `1990;258:E46-E50.8 E3 E; j/ Y' U5 @9 M3 h
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect, z; W$ Q: [4 Y- K: H
of prepubertal androgen exposure on adult penile/ I! d8 G4 M; D: u+ W
length. J Urol. 1996;156:783-787. |
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