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is a significant concern for physicians. Central4 i# l% e9 e# p+ @& B5 D
precocious puberty (CPP), which is mediated0 z& N, ]% z h7 k1 Y$ e! Q
through the hypothalamic pituitary gonadal axis, has
' J( p' i; H, K- y4 N [+ Xa higher incidence of organic central nervous system
7 k# L5 K: o6 D. Ulesions in boys.1,2 Virilization in boys, as manifested5 k: f. T k# p3 o2 f
by enlargement of the penis, development of pubic: T2 ^% {$ ]. z% d
hair, and facial acne without enlargement of testi-3 e& n# T$ R! v
cles, suggests peripheral or pseudopuberty.1-3 We
0 r3 H( s9 Z3 {6 {/ Q: x* [" \report a 16-month-old boy who presented with the1 s; r- S5 g+ J5 G# d- X
enlargement of the phallus and pubic hair develop-
0 G3 J% S: N, U5 pment without testicular enlargement, which was due
3 T# p9 ]0 v/ h4 E5 o3 Hto the unintentional exposure to androgen gel used by
3 ^4 E1 K! E* X" sthe father. The family initially concealed this infor-+ g* d5 k" Y1 b6 T$ N# B. y
mation, resulting in an extensive work-up for this
6 }+ x& X1 q0 y& D( s( Achild. Given the widespread and easy availability of# U4 u; i* R5 g0 R
testosterone gel and cream, we believe this is proba-
$ c2 j, N5 G* vbly more common than the rare case report in the
/ l* o Z" N# h: A$ |7 {literature.4$ Y; T8 c/ l. z8 ~* s v
Patient Report
) ] I9 w$ r' ]& I+ qA 16-month-old white child was referred to the
8 m& f9 I4 z& Q0 o$ U& Gendocrine clinic by his pediatrician with the concern. h; M- I2 ~" k7 U6 p
of early sexual development. His mother noticed+ `9 ]' S/ P3 u! D
light colored pubic hair development when he was* v, y! W+ P s& s' w4 }4 G3 u* A
From the 1Division of Pediatric Endocrinology, 2University of, s+ ]" G8 u. A$ Q
South Alabama Medical Center, Mobile, Alabama.2 W8 x5 L9 u7 A' _+ `# }) U( H
Address correspondence to: Samar K. Bhowmick, MD, FACE,) l. x; z( G. {2 d: Q- a
Professor of Pediatrics, University of South Alabama, College of+ W( ^0 p5 I0 g$ I1 }: @
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
4 @, P+ @$ o) ne-mail: [email protected].4 N+ G F! F; f) z8 j
about 6 to 7 months old, which progressively became: ^. g: |+ u1 a9 j
darker. She was also concerned about the enlarge-
$ L/ z& u3 \6 \6 b5 ~2 ?- Bment of his penis and frequent erections. The child$ j4 z6 Z: P1 ~# D* _: Z
was the product of a full-term normal delivery, with: j4 \& }9 ]2 Y1 f
a birth weight of 7 lb 14 oz, and birth length of
( _7 E5 M! j" l( U20 inches. He was breast-fed throughout the first year
$ y2 w4 j& u# a% S/ t+ `1 Aof life and was still receiving breast milk along with: X" H' x5 W6 d$ {- p4 O
solid food. He had no hospitalizations or surgery,
, n; r# z @; O- Jand his psychosocial and psychomotor development/ F6 k& n$ ^0 v7 K- b1 \* r
was age appropriate.2 O7 f) Q) u' V) ^8 x
The family history was remarkable for the father,
+ W) o" _, c7 \( q' Dwho was diagnosed with hypothyroidism at age 16,
& T6 O. U+ T6 T0 jwhich was treated with thyroxine. The father’s
. G2 I0 L" P" theight was 6 feet, and he went through a somewhat
1 ^1 N2 a; E1 r4 |( B6 q2 P- mearly puberty and had stopped growing by age 14.
$ m3 ^2 U# W% m: i. QThe father denied taking any other medication. The- ?, \. ]* a1 _+ X, w
child’s mother was in good health. Her menarche
; `+ S& T. _$ V1 L8 q i- H* Gwas at 11 years of age, and her height was at 5 feet+ x. j' c6 d6 a) ~) x
5 inches. There was no other family history of pre-
% z* v. ^& a6 U3 r7 Icocious sexual development in the first-degree rela-
( Q" X' r' @& ~2 @tives. There were no siblings.
; O2 v& }6 A& d2 ~" `% H# GPhysical Examination
9 P9 f/ S6 D) B, s' }- }6 k% a! nThe physical examination revealed a very active,
8 N% a2 p+ j( C cplayful, and healthy boy. The vital signs documented9 O. L3 k2 ^4 _- y9 f) F
a blood pressure of 85/50 mm Hg, his length was& {( O1 Y3 v: G2 s
90 cm (>97th percentile), and his weight was 14.4 kg5 h+ p* {5 k0 h7 ~1 [
(also >97th percentile). The observed yearly growth: S* w* G" |/ J3 C+ c5 K! {! R
velocity was 30 cm (12 inches). The examination of$ k; b0 O5 ? e# w3 t( y
the neck revealed no thyroid enlargement.2 q4 l L3 f" L: i0 z0 ^- k
The genitourinary examination was remarkable for) N j9 `& l: @# {. U- \9 i/ q
enlargement of the penis, with a stretched length of
6 ?2 c0 W! s: @; Q6 t) }& C8 cm and a width of 2 cm. The glans penis was very well
; c* e$ I0 `8 h$ w" n# R# x0 odeveloped. The pubic hair was Tanner II, mostly around
6 n) X! r5 K- o3 q/ T& p540
9 a! U/ N& f& _* w$ qat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! |' i7 R& U! B- b: p( f4 gthe base of the phallus and was dark and curled. The
. ^- i; \: O! b0 X; J) Ftesticular volume was prepubertal at 2 mL each., b5 ~! Z5 j# @. J: b
The skin was moist and smooth and somewhat
4 |; l( c) ^" Yoily. No axillary hair was noted. There were no! f! r1 e1 S( e/ u3 F7 [3 r: K/ b
abnormal skin pigmentations or café-au-lait spots.
0 y& G R3 v. p$ I- l- S BNeurologic evaluation showed deep tendon reflex 2+- o1 n; M Q3 \
bilateral and symmetrical. There was no suggestion
; x1 K* a5 P% V5 T) Vof papilledema.
4 l i" ?+ G$ S2 r& T3 y/ I" @Laboratory Evaluation
2 l n% a8 r& R8 o9 y2 Q- TThe bone age was consistent with 28 months by; z) }6 t0 w/ Q2 M
using the standard of Greulich and Pyle at a chrono-
0 y+ z$ R3 i% `logic age of 16 months (advanced).5 Chromosomal
9 B9 A+ M+ O7 g7 Fkaryotype was 46XY. The thyroid function test
- r5 R8 X) m$ h- ?0 N5 x. Tshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
9 k$ f4 Q" g! L/ Olating hormone level was 1.3 µIU/mL (both normal).
! M0 ?7 l) j1 `The concentrations of serum electrolytes, blood
i, X) C( v7 `3 N- E. W* curea nitrogen, creatinine, and calcium all were
$ d% h5 ]6 |& A. Lwithin normal range for his age. The concentration' ]3 B2 o w, _1 e
of serum 17-hydroxyprogesterone was 16 ng/dL
2 a8 `7 }" D; b( d2 J6 G% E0 w(normal, 3 to 90 ng/dL), androstenedione was 20* q& c+ ?+ K" r2 n( N- c
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
3 t# k o( f# s1 n' |1 D" Dterone was 38 ng/dL (normal, 50 to 760 ng/dL),
9 A7 ?% W# z3 {% L8 s* Y( Sdesoxycorticosterone was 4.3 ng/dL (normal, 7 to- {+ ]: z. {( V' W- Q+ F
49ng/dL), 11-desoxycortisol (specific compound S)& ^# m2 v1 `) {4 k/ `
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-1 E% n6 B! N. Z/ i; J0 N
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 I; M' A: h% Otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),' P9 y9 `1 a1 {1 [% ]/ [
and β-human chorionic gonadotropin was less than
8 K+ q w I. C* z, g5 mIU/mL (normal <5 mIU/mL). Serum follicular
9 Y+ Z( J" q) @) k7 wstimulating hormone and leuteinizing hormone
) E: [; {7 ]/ \% H4 w4 e! |concentrations were less than 0.05 mIU/mL8 I: X- N8 ?8 t7 |6 w E/ P4 W0 i
(prepubertal).
/ o0 _' W7 m/ @3 @& mThe parents were notified about the laboratory
! @) `) ] m. q" K9 Q9 r2 fresults and were informed that all of the tests were
6 t$ V; }* M) O; j7 Gnormal except the testosterone level was high. The& g: N# e" Z4 f; y; `# b; ?5 G
follow-up visit was arranged within a few weeks to9 S; ?# `- v& [0 n C$ k7 a# N
obtain testicular and abdominal sonograms; how-* x1 H6 u6 M1 Z0 f( e" J, G. S2 |
ever, the family did not return for 4 months.) m" M3 I& U# K8 V) K% G! \
Physical examination at this time revealed that the' r5 R7 v' O* `* Q5 a: N0 a; M0 [+ W
child had grown 2.5 cm in 4 months and had gained& d! @5 m0 x4 s# y' d. O8 _
2 kg of weight. Physical examination remained
0 a7 q/ g; @; junchanged. Surprisingly, the pubic hair almost com-' J, c% S8 n5 O5 [" O; J
pletely disappeared except for a few vellous hairs at
. P# e2 e& n' j8 O3 B* Rthe base of the phallus. Testicular volume was still 22 s7 e2 k4 E/ G, \+ g2 I
mL, and the size of the penis remained unchanged.% r4 D; j9 T$ `& T
The mother also said that the boy was no longer hav-
1 G9 R# t' h. V* }* o) O) \0 j! bing frequent erections.1 _ X; ]" u; ^
Both parents were again questioned about use of9 }+ ^- m/ | E
any ointment/creams that they may have applied to4 C% R/ n3 R H5 P; U" {2 T6 z
the child’s skin. This time the father admitted the5 ?, @# x3 A- u% E
Topical Testosterone Exposure / Bhowmick et al 541% \: _- p9 \2 K1 R8 n
use of testosterone gel twice daily that he was apply-
: k. |! Z3 H% j, }/ E, n+ c% bing over his own shoulders, chest, and back area for
* X& [ E, o" z" @- b" I2 xa year. The father also revealed he was embarrassed
. m6 W* Q8 b, N* X3 ?. q& bto disclose that he was using a testosterone gel pre-
- o6 o5 e) s* R9 ~scribed by his family physician for decreased libido: }+ ]% X. m7 u; e2 r
secondary to depression.7 F- @8 W5 T( t' S: H! R
The child slept in the same bed with parents.
7 g' J, }& O: w( n# i: K5 JThe father would hug the baby and hold him on his( I1 ]! W) ?# n, R9 M
chest for a considerable period of time, causing sig-
* q4 i* [. N5 lnificant bare skin contact between baby and father.9 m$ T: y" {4 i
The father also admitted that after the phone call,
$ ]/ I+ h2 u# }when he learned the testosterone level in the baby* @. v( N( p% A$ H1 E5 I' X2 C+ H
was high, he then read the product information2 v6 o; U O1 f9 a( Z6 P
packet and concluded that it was most likely the rea-0 C* N0 p- L5 a* e& ]
son for the child’s virilization. At that time, they7 ?( d9 y# D2 u/ G; w
decided to put the baby in a separate bed, and the
2 d a: G$ e$ g( }" Gfather was not hugging him with bare skin and had9 `! s- h B) K6 Q9 c
been using protective clothing. A repeat testosterone, j; c5 n$ G) L. c- Y. a; Y
test was ordered, but the family did not go to the
: s/ D, b4 | p1 A, p/ `laboratory to obtain the test.& s6 U, J0 I# ~$ v7 o
Discussion' t& e% n S9 V# |$ s$ R
Precocious puberty in boys is defined as secondary
& r: p' M \7 }0 Q# j H% Ksexual development before 9 years of age.1,4
$ U% i1 \. P7 |2 k; OPrecocious puberty is termed as central (true) when
* i' k; j: P' y6 z {1 ^it is caused by the premature activation of hypo-
2 V M ~. Y$ B$ M# ~ c! H/ D6 M. Q2 J, Nthalamic pituitary gonadal axis. CPP is more com-
% U) n7 b; u1 ~( Rmon in girls than in boys.1,3 Most boys with CPP
& G8 u' Z9 y, b- Rmay have a central nervous system lesion that is
) d) }1 Y' w. Y' | F+ D+ A1 xresponsible for the early activation of the hypothal-: w# }) m' }& G% s: H3 |3 X1 }
amic pituitary gonadal axis.1-3 Thus, greater empha-
" n8 T$ M7 X: }* I6 F1 ~; Osis has been given to neuroradiologic imaging in7 N0 N G: q$ S& t. i
boys with precocious puberty. In addition to viril-' Q( m6 \ ?! H
ization, the clinical hallmark of CPP is the symmet-
+ p) Y: u4 y/ Z7 K; _" Urical testicular growth secondary to stimulation by
1 ]+ c# |, H: |) J/ {9 \' Vgonadotropins.1,3
I" Z* {+ U( E, X" eGonadotropin-independent peripheral preco-
5 U/ G" I& X9 _8 c0 e9 I9 V6 Icious puberty in boys also results from inappropriate
' {- o9 B, P6 h4 y$ H- Pandrogenic stimulation from either endogenous or M- o7 G# ^* g- o
exogenous sources, nonpituitary gonadotropin stim-3 }8 q: d: r8 R) f# \$ L
ulation, and rare activating mutations.3 Virilizing8 b$ v# H K' r5 j$ b6 b
congenital adrenal hyperplasia producing excessive
W5 y3 _% F& y D( vadrenal androgens is a common cause of precocious
) N7 M# D; r% `3 O/ @7 V2 Z; tpuberty in boys.3,4. I9 n! X9 L. d/ p
The most common form of congenital adrenal
( P- d* R1 _8 [) ohyperplasia is the 21-hydroxylase enzyme deficiency.- X n+ L1 _: y0 D
The 11-β hydroxylase deficiency may also result in
; ]/ c( J4 P6 H# Uexcessive adrenal androgen production, and rarely,
- ~5 o, y$ n8 _, ?8 I. R$ ran adrenal tumor may also cause adrenal androgen
6 v2 m! o2 @( J% }1 ?- Rexcess.1,3) n$ j% w1 U" ~# i7 x, O% c
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* a5 a% Y# {) I& E" a1 K542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
6 q; [/ Z0 B% y! q, W* A3 _( GA unique entity of male-limited gonadotropin-- a7 j, o/ A8 |/ N
independent precocious puberty, which is also known
) q5 c/ E$ m* |( f7 ^as testotoxicosis, may cause precocious puberty at a1 \! F2 r: k8 ~# O) W; ^; ^
very young age. The physical findings in these boys! ]4 N8 b1 C! z- [
with this disorder are full pubertal development,* ?: T8 H ] U3 x" }0 ?
including bilateral testicular growth, similar to boys( n7 o6 M- F0 t5 D1 ^ z) t7 l
with CPP. The gonadotropin levels in this disorder: u' z; z- K* P" }! ? j- p0 u, V( D
are suppressed to prepubertal levels and do not show
. e) u4 g$ j- ?/ rpubertal response of gonadotropin after gonadotropin-
8 [( v i9 k$ greleasing hormone stimulation. This is a sex-linked
+ ]. {/ o6 h9 \( k4 ?autosomal dominant disorder that affects only: v: |- @5 I( D, b
males; therefore, other male members of the family
6 Q8 o. w* V! z! k m9 K* i! H* h4 Omay have similar precocious puberty.3
" _3 E( }3 S, K6 A& qIn our patient, physical examination was incon-
# @# P, H( s- jsistent with true precocious puberty since his testi-7 w% E. R$ g) c# W9 G( R
cles were prepubertal in size. However, testotoxicosis
" }. j: c+ ]" i# Wwas in the differential diagnosis because his father- I# G- c( y9 f
started puberty somewhat early, and occasionally," Z( S; m8 V/ B X u/ V5 _+ ^( h
testicular enlargement is not that evident in the: ], O9 m/ s) |8 O! [. J7 d
beginning of this process.1 In the absence of a neg-0 m, ?% t* s; W6 ^# T3 u, F
ative initial history of androgen exposure, our
8 c( h: y) N) u! Bbiggest concern was virilizing adrenal hyperplasia,
^& ^) B* a$ teither 21-hydroxylase deficiency or 11-β hydroxylase1 }7 N6 `" b* d# M; W9 q5 |
deficiency. Those diagnoses were excluded by find-
3 w: @7 n4 e0 F! ?7 \' ~3 Iing the normal level of adrenal steroids.
- n7 B8 B! Q2 ~4 `) ^8 A0 d# G! E; KThe diagnosis of exogenous androgens was strongly" O0 h! d9 S2 m' W! T
suspected in a follow-up visit after 4 months because
2 p% }, ?# Q0 U/ k, G% Athe physical examination revealed the complete disap-
: z4 ~! w' l* dpearance of pubic hair, normal growth velocity, and$ C: H( {$ @4 r3 L* K
decreased erections. The father admitted using a testos-/ r4 E/ [6 k: t
terone gel, which he concealed at first visit. He was, w5 t9 r/ T( k$ N0 N
using it rather frequently, twice a day. The Physicians’' W. B2 l6 M8 ^4 u
Desk Reference, or package insert of this product, gel or/ _+ x: B& V1 b. `/ l! d7 P6 e
cream, cautions about dermal testosterone transfer to0 e- p$ C# R) U! E
unprotected females through direct skin exposure.6 o8 F. e' ]1 d/ s; d3 m4 n+ E
Serum testosterone level was found to be 2 times the
8 X m1 B% {5 b( j( p8 N% c; ?baseline value in those females who were exposed to( B8 L" Q }! U
even 15 minutes of direct skin contact with their male
( D; i7 K) G: A/ \) a/ Gpartners.6 However, when a shirt covered the applica-
6 Y9 e' x& A9 j" U7 N' ]% x2 Qtion site, this testosterone transfer was prevented.3 Y4 p$ ?6 q8 k6 N* ]* v
Our patient’s testosterone level was 60 ng/mL,- I' {1 V$ K$ ~
which was clearly high. Some studies suggest that( F5 j6 L3 x& ^) ? L F* F9 j
dermal conversion of testosterone to dihydrotestos-
" @4 n! k; |0 }terone, which is a more potent metabolite, is more
$ H, ]/ m3 {! W1 m" q. Mactive in young children exposed to testosterone
8 N! v% p) i- }4 L1 [& A- K0 nexogenously7; however, we did not measure a dihy-
' j6 f- ~2 n' X; A. Fdrotestosterone level in our patient. In addition to) ~% `1 Q$ I0 z$ M3 Q4 F- M
virilization, exposure to exogenous testosterone in! z6 q0 Y+ x4 z. R. m
children results in an increase in growth velocity and
- F5 s8 S( S$ s* |6 ~advanced bone age, as seen in our patient.
/ x+ e6 h' k" k) W% CThe long-term effect of androgen exposure during& l* I6 Q+ D" `4 K: P
early childhood on pubertal development and final
0 u0 {" H8 |! q! R' _/ Ladult height are not fully known and always remain- M+ t0 M7 p% [. ? p6 o [
a concern. Children treated with short-term testos-# R5 K0 u1 F6 L7 A
terone injection or topical androgen may exhibit some
E, c( ~; L' u/ e1 E6 w" eacceleration of the skeletal maturation; however, after
' s |/ b( H2 pcessation of treatment, the rate of bone maturation- K) s6 Z: ]( E. s( M/ u! u3 ? \
decelerates and gradually returns to normal.8,9" A1 B# j( B L; S$ B; ]
There are conflicting reports and controversy3 y& V- p" s6 g0 }
over the effect of early androgen exposure on adult6 }1 `+ t( s* f" p: `
penile length.10,11 Some reports suggest subnormal
, H8 T0 a' e) C& Z" {adult penile length, apparently because of downreg-: J% G: t# Q& Z1 n1 a2 x! p: p+ T
ulation of androgen receptor number.10,12 However,$ b6 ^, \+ p' R( v- Y
Sutherland et al13 did not find a correlation between4 M3 S8 s% Z3 d& G( y, H6 W
childhood testosterone exposure and reduced adult
/ f8 k/ w" d3 C/ D. Vpenile length in clinical studies.* V% ]% t5 ]; t1 R; i
Nonetheless, we do not believe our patient is7 h( g* d. L; ~/ o
going to experience any of the untoward effects from
$ [1 @) E# L7 l" ztestosterone exposure as mentioned earlier because0 `( ]6 n" u- T% ]0 E5 e
the exposure was not for a prolonged period of time." j: g4 `. [5 Z8 ~' p
Although the bone age was advanced at the time of
; P0 Q% {8 R- t. N2 G/ F8 H! Y$ qdiagnosis, the child had a normal growth velocity at: p+ j+ ~6 c6 ~
the follow-up visit. It is hoped that his final adult
+ T+ d* B! h% w& o- sheight will not be affected.
# i8 k* [6 _; x2 i8 L7 j# V! }& DAlthough rarely reported, the widespread avail-
. o* a4 ]9 d; X2 i4 `7 a# n, Cability of androgen products in our society may( ?2 o! ~1 d! S( _
indeed cause more virilization in male or female: m+ t! u1 r4 J2 u" j! u
children than one would realize. Exposure to andro-
' _* W3 Z# c7 \4 \ W6 o0 D; f6 qgen products must be considered and specific ques-
* J# v0 |) d8 A/ g1 f3 Qtioning about the use of a testosterone product or+ A1 W$ v4 v' o, {$ k8 m
gel should be asked of the family members during3 F1 p; a5 D$ C- J* B% ^1 l
the evaluation of any children who present with vir-
1 Q P1 d6 q) O: `0 Nilization or peripheral precocious puberty. The diag-
3 r* a1 m' i8 J2 S# \nosis can be established by just a few tests and by' \$ m- h6 S0 W1 c. ]5 k6 D
appropriate history. The inability to obtain such a
1 b- |+ {4 k: H3 K, F' q1 f* D, C( Bhistory, or failure to ask the specific questions, may
0 a0 c7 ^$ ?2 o! J0 v& f( Presult in extensive, unnecessary, and expensive) C1 f/ R0 I+ e2 E9 M2 F; d
investigation. The primary care physician should be8 j' N- N" D& G
aware of this fact, because most of these children
( O" s/ k, x4 G3 S5 X( z. umay initially present in their practice. The Physicians’
& Z- j2 U, w; u1 h9 tDesk Reference and package insert should also put a7 b7 z1 {# x" X) _# [& p
warning about the virilizing effect on a male or2 m/ U4 m; i% s8 w( R# |" m7 W7 m3 \
female child who might come in contact with some-0 B$ b' ^* ^. M
one using any of these products.! V! u- L' C) o# k
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1. Styne DM. The testes: disorder of sexual differentiation9 G! D& A/ `- S R
and puberty in the male. In: Sperling MA, ed. Pediatric7 k* q. s% t4 j0 t4 j
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
$ G# l: A9 \3 f" m+ Y2002: 565-628.
; j/ a, \8 B* Y; J" K2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
3 K+ d7 ?4 o% J0 U, J, Lpuberty in children with tumours of the suprasellar pineal
/ }7 x9 ^7 V; {+ ]* R a8 @0 q, jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from& U/ w5 }: H. @! c! L
Topical Testosterone Exposure / Bhowmick et al 5432 o8 ~" z3 X6 P3 n
areas: organic central precocious puberty. Acta Paediatr.
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3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed./ E7 q. H z4 T- g- W) X( A3 y
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
# S! k9 C, _# {Dekker Inc; 2003:211-238.9 w) t8 a' g6 k; Q# Z! m( t% L
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual( l$ A- a8 D+ G8 `; k3 U, c4 \
development in a two-year-old boy induced by topical; { X f" b, t3 s' O& C
exposure to testosterone. Pediatrics. 1999;104:e23.
. h1 H" E8 j7 a8 m% x: j/ k5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
5 z9 q& ^( l- {- a, e8 l0 oSkeletal Development of the Hand and Wrist. 2nd ed.
& b' f4 u7 `4 fStanford, CA: Stanford University Press; 1959.
+ R+ l! P) _. e% ~9 ]/ r& Q+ y6. Physicians’ Desk Reference. Androgel 1% testosterone,
, a1 R! i5 U7 q9 T# `, M$ v& \Unimed Pharmaceutical Inc. Montvale, NJ: Medical
6 n) Y. h6 o% x4 s2 JEconomics Company, Inc; 2004:3239-3241.( K" F B k; ^2 V
7. Klugo RC, Cerny JC. Response of micropenis to topical
+ _3 n& Y: f, K: m3 B" btestosterone and gonadotropin. J Urol. 1978;119:
+ i6 B& j) H& A: F! @3 D667-668.
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