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is a significant concern for physicians. Central1 u2 |& J$ d# A* e
precocious puberty (CPP), which is mediated8 ~3 n K: x; G) y; z' L( O
through the hypothalamic pituitary gonadal axis, has
& o7 k. E# k: g9 r$ n4 W" ja higher incidence of organic central nervous system
5 l E7 G3 P% G6 Tlesions in boys.1,2 Virilization in boys, as manifested$ K' K: C# T& a
by enlargement of the penis, development of pubic3 }; s7 m/ i3 ?- y% \& \
hair, and facial acne without enlargement of testi-! h! [ x! q& [, R: U
cles, suggests peripheral or pseudopuberty.1-3 We
" O6 x9 r8 M& l1 `, q% c ~9 Z1 Mreport a 16-month-old boy who presented with the5 {1 l4 E$ @- \( f1 p! J0 O: B( o
enlargement of the phallus and pubic hair develop-
4 z! H F2 D5 N4 Q+ Dment without testicular enlargement, which was due8 U' G2 J$ e1 I0 J: j8 d
to the unintentional exposure to androgen gel used by
* _7 ?6 y$ b& N& |the father. The family initially concealed this infor-! Q* P( X( e: s
mation, resulting in an extensive work-up for this+ S( W( ~7 z% x* G% L
child. Given the widespread and easy availability of
5 `2 |5 P$ f" I" U) F5 L) Etestosterone gel and cream, we believe this is proba-2 o7 v6 |$ ?0 C0 k
bly more common than the rare case report in the
3 F8 v E" u* `0 Lliterature.4
/ t4 }2 Z$ R% S# _Patient Report4 m# F4 z2 S p y( L# T$ {
A 16-month-old white child was referred to the
& u; j, z2 N7 F6 ?" I% Q3 v2 Mendocrine clinic by his pediatrician with the concern2 b1 N5 A. x8 Q0 v: F' Y* c
of early sexual development. His mother noticed
7 j8 H7 T+ t8 ~$ l1 _$ elight colored pubic hair development when he was
7 x" v0 a% F/ a& O8 Q2 ~3 v! bFrom the 1Division of Pediatric Endocrinology, 2University of& S1 L, X6 N0 G9 Q
South Alabama Medical Center, Mobile, Alabama.
+ r: I2 }/ r* E- \Address correspondence to: Samar K. Bhowmick, MD, FACE,
1 g! {4 }2 G& hProfessor of Pediatrics, University of South Alabama, College of
; p+ u' `! c1 c! \) ]8 H! Q0 NMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;* L# N+ \% ]6 h% |% {: j
e-mail: [email protected].& \7 }) k) A2 c$ Q# A
about 6 to 7 months old, which progressively became
# Q% E% G4 N' x# P& F# @darker. She was also concerned about the enlarge-5 P$ `' I8 c J A6 S& x( l
ment of his penis and frequent erections. The child
% W7 q% [, ~! F) Vwas the product of a full-term normal delivery, with& m* Y7 F% y. @2 a0 y5 F+ Q
a birth weight of 7 lb 14 oz, and birth length of7 r$ w; V: b" {5 n: C7 N, y
20 inches. He was breast-fed throughout the first year- D/ h/ X, F U' b& r7 E: D7 o8 ~
of life and was still receiving breast milk along with) e8 N8 x3 J$ v0 T+ ^4 \
solid food. He had no hospitalizations or surgery,3 f; k: n/ p& L& L2 s/ O
and his psychosocial and psychomotor development
7 _' Q. ?( c% F0 Y# Y) R1 m1 nwas age appropriate." t; ]2 l8 X; e* w1 M9 }
The family history was remarkable for the father,
! x+ h) z) }) S8 R4 }, ewho was diagnosed with hypothyroidism at age 16,
) n* R& ?& @! y i% Owhich was treated with thyroxine. The father’s
7 o9 T6 S# x+ x1 f/ Aheight was 6 feet, and he went through a somewhat
# A$ ]1 a/ x; `6 J9 O' l; {early puberty and had stopped growing by age 14.
6 @! f4 h& S: R" i9 _The father denied taking any other medication. The8 W0 r" A. v& l( W# Z. J. q+ f
child’s mother was in good health. Her menarche
0 l6 @( _2 R; a2 }4 z9 Bwas at 11 years of age, and her height was at 5 feet
5 D4 l/ c3 m" w {5 inches. There was no other family history of pre-
" Y4 n) M* Q* dcocious sexual development in the first-degree rela-
1 V( G+ |. X4 g7 e7 ktives. There were no siblings.
& {4 s: A: L' UPhysical Examination
' E* g& M0 l1 j4 s% j! SThe physical examination revealed a very active,
% Y& Z' h- S4 U2 U# J7 t! ^playful, and healthy boy. The vital signs documented
/ {: Y) z5 W3 t1 q* A' O+ ka blood pressure of 85/50 mm Hg, his length was6 i$ Q3 i( K( P- y1 w( e& ~
90 cm (>97th percentile), and his weight was 14.4 kg$ j1 u q5 g* Z
(also >97th percentile). The observed yearly growth
- w* y9 u& j# Vvelocity was 30 cm (12 inches). The examination of
7 S0 L0 ~) x( X+ @: ithe neck revealed no thyroid enlargement.4 J& h+ M! U' D! Q
The genitourinary examination was remarkable for# p9 k& b8 X/ ~& Q2 s
enlargement of the penis, with a stretched length of
0 |3 p. g4 ]9 L2 J9 _* o( C# r+ R8 cm and a width of 2 cm. The glans penis was very well
: L3 @* V& ~7 l5 I) E) Q- |) b9 o- bdeveloped. The pubic hair was Tanner II, mostly around
' S7 A, p; x- P8 m% w" L5 S! W/ r8 |+ \% _$ ~540" f. h8 c0 g+ s8 K9 V
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, z9 m# K7 {3 h' ]* C6 S. n/ x
the base of the phallus and was dark and curled. The! Y. C+ S3 N3 y
testicular volume was prepubertal at 2 mL each.
3 t" @( S' M+ L- u$ p) tThe skin was moist and smooth and somewhat
: o1 x+ ]. Q5 voily. No axillary hair was noted. There were no3 @, @; F3 n1 a; ^; J
abnormal skin pigmentations or café-au-lait spots.% G4 t i3 G% o( U, O
Neurologic evaluation showed deep tendon reflex 2+1 e" x q" Q4 w/ W' q0 U( f6 l b
bilateral and symmetrical. There was no suggestion
6 R1 {$ E$ x( C# Lof papilledema.
; K; G% L" \' N2 F2 r+ V# m/ G) oLaboratory Evaluation8 s5 j% q4 Y. y; ^5 l7 y
The bone age was consistent with 28 months by8 J/ E$ {) P' D! o' | e' {
using the standard of Greulich and Pyle at a chrono-3 l$ m1 _$ y! x+ t1 T
logic age of 16 months (advanced).5 Chromosomal, H9 Q5 M5 F( x; P# ]7 ^7 ~
karyotype was 46XY. The thyroid function test
+ O3 q: {, r+ F" jshowed a free T4 of 1.69 ng/dL, and thyroid stimu-; Q+ ^3 `; T6 q& A
lating hormone level was 1.3 µIU/mL (both normal).# [# A! _! |4 t* I
The concentrations of serum electrolytes, blood
$ s5 H" S V& c4 |5 V' d0 Aurea nitrogen, creatinine, and calcium all were2 w) K% @! h: L/ a# A5 d2 b- U
within normal range for his age. The concentration5 L% d4 H6 `- L( b F: ?# z
of serum 17-hydroxyprogesterone was 16 ng/dL
" J! A% X r5 d: ~( G(normal, 3 to 90 ng/dL), androstenedione was 20
! y, R/ [: |9 D2 k, {$ c& I2 Eng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
' e5 ?. h5 }! J* M/ @4 Q) L/ yterone was 38 ng/dL (normal, 50 to 760 ng/dL),
/ o+ K) e; n" V5 @/ gdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
3 i' a% d7 M4 c* g' C49ng/dL), 11-desoxycortisol (specific compound S)
' J& \ v1 B, M4 B" |was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
/ P8 i, ?2 Y( E9 ktisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total. k. Y: \* l/ f8 h+ @# Q
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),5 \+ H o9 u4 i& ]
and β-human chorionic gonadotropin was less than
$ C% m6 m# h) e+ X4 K3 {1 q' r5 mIU/mL (normal <5 mIU/mL). Serum follicular7 e2 Z: P7 C3 y. i2 ?, y& Q
stimulating hormone and leuteinizing hormone0 Y( q% m, P) @3 `9 ?; r. J8 \. {9 _0 A
concentrations were less than 0.05 mIU/mL
2 K' f. v6 H. z) @(prepubertal).9 ]& O' M" I2 T% I# X
The parents were notified about the laboratory
( a L- l. K) n/ O3 Sresults and were informed that all of the tests were
$ z6 P3 A$ g; G8 i9 V( C# ynormal except the testosterone level was high. The* {+ A1 D9 U( A. b
follow-up visit was arranged within a few weeks to
! D% v2 ]7 [7 J" e. hobtain testicular and abdominal sonograms; how-( k/ c! x& R$ T6 n0 D
ever, the family did not return for 4 months.
9 O, a6 z; v5 B& _Physical examination at this time revealed that the3 N+ t0 R- o# v
child had grown 2.5 cm in 4 months and had gained1 G$ a$ @% l: d. [
2 kg of weight. Physical examination remained
" O7 F* w+ N5 g) f- ~. X9 ~unchanged. Surprisingly, the pubic hair almost com-3 m# M) O% M- k
pletely disappeared except for a few vellous hairs at
! |7 ]; U6 @- V2 l3 m* z2 \the base of the phallus. Testicular volume was still 2* i6 k; y4 c2 C: o$ a" M9 ]
mL, and the size of the penis remained unchanged.
' j* O0 G, w! N# @, a, AThe mother also said that the boy was no longer hav-9 n: S9 e# b! r. w
ing frequent erections.
% r8 e, e; J8 Z8 P' @( o" `& ^Both parents were again questioned about use of
/ C8 @ N2 g% P! w2 X1 y$ m1 vany ointment/creams that they may have applied to' o: w8 ?2 V' }* O8 O
the child’s skin. This time the father admitted the4 u; F6 _0 o3 f! e
Topical Testosterone Exposure / Bhowmick et al 541" z; z- Y2 H; e" n" Z
use of testosterone gel twice daily that he was apply-
/ o" U, u. g1 u+ d# ~ing over his own shoulders, chest, and back area for3 Z8 f1 v ^2 |2 G' L/ S! x1 |
a year. The father also revealed he was embarrassed
3 k- I& c e! I! E, G6 q) sto disclose that he was using a testosterone gel pre-
( @8 W: I* t0 `5 \scribed by his family physician for decreased libido3 l- S- {3 p( e; n/ J: I) N( G
secondary to depression.3 B8 }3 K8 m+ }% U a2 z' l
The child slept in the same bed with parents.
" X+ E* Q* Z4 |, rThe father would hug the baby and hold him on his `" ?; \9 w) d# w% l
chest for a considerable period of time, causing sig-7 [) X; R" Z4 T0 y
nificant bare skin contact between baby and father.
9 @6 P$ g2 D QThe father also admitted that after the phone call,9 z+ n4 a! S. Y
when he learned the testosterone level in the baby
$ [, J: O9 j% y) P cwas high, he then read the product information$ P( h/ g! g, w" s& }
packet and concluded that it was most likely the rea-
# Y6 l6 ~2 U- \( |4 h- kson for the child’s virilization. At that time, they
& ^" _9 }0 w1 v6 N( }decided to put the baby in a separate bed, and the
4 h4 g2 S/ [* N$ s8 ufather was not hugging him with bare skin and had
. b) P1 N9 g7 x7 |. n0 [been using protective clothing. A repeat testosterone
+ R+ h" v2 i F$ b9 j4 }3 xtest was ordered, but the family did not go to the
+ h6 e9 g9 Z1 ` H! L7 i4 plaboratory to obtain the test., q7 U9 s9 j1 p; e% p
Discussion+ n% o7 A1 {- _3 u x5 m" [
Precocious puberty in boys is defined as secondary& W( @$ f9 ]: e1 }" q, D# y
sexual development before 9 years of age.1,4 Q' W! p! A$ c% l/ b! t
Precocious puberty is termed as central (true) when
" m8 D7 o7 {. _. Z# nit is caused by the premature activation of hypo-
! ?( L4 h. d4 g# I& ]- Y0 dthalamic pituitary gonadal axis. CPP is more com-
# l2 A. n7 `; Amon in girls than in boys.1,3 Most boys with CPP# m3 J- V2 O- Y1 o. C4 H
may have a central nervous system lesion that is
8 H! z' R1 A% W/ p7 Zresponsible for the early activation of the hypothal-8 g; w1 r) h. ?9 V
amic pituitary gonadal axis.1-3 Thus, greater empha-
/ [0 t0 H, v1 E, W* S+ Esis has been given to neuroradiologic imaging in
/ j9 u- \6 n5 T3 Kboys with precocious puberty. In addition to viril-- [9 k" q: v$ l
ization, the clinical hallmark of CPP is the symmet-
a, z9 ]3 d L: Drical testicular growth secondary to stimulation by) A+ ?% a! \* c9 E
gonadotropins.1,3
# s& G. ^; K; I; T7 ~2 w% sGonadotropin-independent peripheral preco-6 @$ z! ?: t; \9 \. v: K
cious puberty in boys also results from inappropriate$ N- A p& }/ P1 d5 h) {
androgenic stimulation from either endogenous or
( j1 ~8 b! G3 D8 \$ Eexogenous sources, nonpituitary gonadotropin stim-% I. L n( Y" v( u W0 A4 z- x5 y' `
ulation, and rare activating mutations.3 Virilizing
( F/ a1 Z! g" T6 r6 econgenital adrenal hyperplasia producing excessive
7 W; r* ~2 |$ ]4 D( r3 hadrenal androgens is a common cause of precocious
* V( K2 N6 d, b c* M# Wpuberty in boys.3,4
. P- |0 D% I* G$ W/ h9 |6 f+ WThe most common form of congenital adrenal
7 L7 ~0 X, Q$ `" Rhyperplasia is the 21-hydroxylase enzyme deficiency.8 M: I V6 B9 H4 g' S7 x& H
The 11-β hydroxylase deficiency may also result in
6 U- e4 ~1 c' v1 g. m% [0 e- i% Oexcessive adrenal androgen production, and rarely,- _+ C) O( {% y* d8 F7 t7 i
an adrenal tumor may also cause adrenal androgen
4 C5 O9 P) D3 \& Yexcess.1,32 C; Y) o8 O9 J& g; Q& X5 {: u2 p
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; ?7 S% W9 F, ~5 C1 ~& c; g1 h2 w
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007$ w" K3 I+ q# T, f
A unique entity of male-limited gonadotropin-) u A/ T7 f5 |- Y# t- @
independent precocious puberty, which is also known* S7 A' ?, e! u* K: U) k
as testotoxicosis, may cause precocious puberty at a8 t) m+ U H C4 B
very young age. The physical findings in these boys) _! {6 a% ^/ K0 A* [6 `5 W+ t5 [* q
with this disorder are full pubertal development,
: o+ J( ]5 n* y. q* B$ a5 kincluding bilateral testicular growth, similar to boys
) r A5 V3 |9 o- Z2 K7 E) Xwith CPP. The gonadotropin levels in this disorder" x( i8 d" V, r( v+ a& c
are suppressed to prepubertal levels and do not show' N+ m; s; u+ }# c
pubertal response of gonadotropin after gonadotropin-; n& ?- I) o! s
releasing hormone stimulation. This is a sex-linked
2 P O; B* _' t8 w; vautosomal dominant disorder that affects only
1 h, k$ T" W) A6 ]males; therefore, other male members of the family0 C% T+ `4 }3 f& D
may have similar precocious puberty.39 V/ S6 l5 E8 Z5 f
In our patient, physical examination was incon-
1 p2 l4 V1 I1 e* _ b1 ysistent with true precocious puberty since his testi-
1 D. B. n/ m8 |& W. b6 }! m& bcles were prepubertal in size. However, testotoxicosis2 M9 ]* X# b: P0 a/ B0 c& x
was in the differential diagnosis because his father% V; H& X- X; K" H0 r P
started puberty somewhat early, and occasionally,) g8 M) R+ h0 O* l3 z: x+ K
testicular enlargement is not that evident in the
' @' z. h2 b+ k) x$ Bbeginning of this process.1 In the absence of a neg-
/ N% s% I& O- k* K* \ative initial history of androgen exposure, our
) \3 s( |; i0 V. B9 q6 K" W& jbiggest concern was virilizing adrenal hyperplasia,, u" H( C& y: o6 W; r: e
either 21-hydroxylase deficiency or 11-β hydroxylase
3 e( ?3 V' E; [+ G: v. i I cdeficiency. Those diagnoses were excluded by find-8 N' p: _2 Y/ b
ing the normal level of adrenal steroids.
) t1 O6 S# {7 [" `3 \8 z, MThe diagnosis of exogenous androgens was strongly5 \: i; C U% J' [
suspected in a follow-up visit after 4 months because
5 z- s/ V" f5 e# Hthe physical examination revealed the complete disap-
3 O) l) c8 C" qpearance of pubic hair, normal growth velocity, and
! F5 n' r9 u, I1 h: T, R% Idecreased erections. The father admitted using a testos-2 W1 J+ p4 z3 o
terone gel, which he concealed at first visit. He was. H4 D2 t0 j! x U/ O/ Y
using it rather frequently, twice a day. The Physicians’) l( p9 w6 J4 J2 d1 q. X9 e
Desk Reference, or package insert of this product, gel or& L& v6 n" w6 M
cream, cautions about dermal testosterone transfer to
; |. K+ f0 h6 C3 ]: [' l% }7 @& gunprotected females through direct skin exposure.
6 o. W! u: t- l$ oSerum testosterone level was found to be 2 times the
+ {5 B( P% e& r7 x; ~7 Kbaseline value in those females who were exposed to7 V' E* U1 q- Q- r$ {2 K; F
even 15 minutes of direct skin contact with their male+ M& C8 U2 H l6 y) L
partners.6 However, when a shirt covered the applica-
* }" g$ D: m2 p5 {" F2 ~tion site, this testosterone transfer was prevented.4 W5 t# E. Q# n
Our patient’s testosterone level was 60 ng/mL,4 D9 V% d! U' ]7 I1 Z# q
which was clearly high. Some studies suggest that
% T" r8 N; F% v1 ~8 L- Udermal conversion of testosterone to dihydrotestos-3 O' u8 k) H% w, t' M
terone, which is a more potent metabolite, is more
; W1 N! T! c! { M6 ]: bactive in young children exposed to testosterone$ W6 o9 t8 }& \
exogenously7; however, we did not measure a dihy-
7 V- Z& x. p, t8 K0 P3 [* y% xdrotestosterone level in our patient. In addition to
6 d" }* O2 I* qvirilization, exposure to exogenous testosterone in2 a8 ^! V' t. D
children results in an increase in growth velocity and
" v( M% W! `8 Ladvanced bone age, as seen in our patient.% y, [& t! c$ m* `6 \; b" M
The long-term effect of androgen exposure during- C5 \, p! N9 M# v
early childhood on pubertal development and final
3 ? W* P4 U$ Y6 q, t1 fadult height are not fully known and always remain" l) e! s9 T6 p- z2 \9 c
a concern. Children treated with short-term testos-
. M4 F6 U0 Z& R4 J3 M, d& _' Kterone injection or topical androgen may exhibit some! f& b# {+ M# T$ R
acceleration of the skeletal maturation; however, after$ p d- W% G; k9 K; o8 s) I9 u
cessation of treatment, the rate of bone maturation
9 x- e1 a8 m8 K# d2 |8 _* I$ _+ Ldecelerates and gradually returns to normal.8,9
6 J& m1 b3 O' Y$ E1 zThere are conflicting reports and controversy0 G1 p& l5 z/ ]. r! U
over the effect of early androgen exposure on adult! u9 V% f% S' }! w5 \
penile length.10,11 Some reports suggest subnormal) t' W1 I8 q! a9 n
adult penile length, apparently because of downreg-* n% m i, g# ?/ r0 G7 [" y! t% K- B
ulation of androgen receptor number.10,12 However,
5 P3 v& P( \6 |9 ^. eSutherland et al13 did not find a correlation between+ i) |- r" a. f7 `( L2 ~) c$ T
childhood testosterone exposure and reduced adult
7 }3 d; b- O' x2 g8 S9 M1 vpenile length in clinical studies.9 ^3 V3 K0 \" {: s9 y/ d
Nonetheless, we do not believe our patient is, d# R2 q$ T2 ^- `4 G8 c# \
going to experience any of the untoward effects from$ V% N. F, R- ~$ k7 p+ z
testosterone exposure as mentioned earlier because& P. [( C7 f+ N: V4 {; o2 Z% s, m
the exposure was not for a prolonged period of time.
% |7 R( G. v* G. g! f9 cAlthough the bone age was advanced at the time of/ P4 k+ l3 O! S
diagnosis, the child had a normal growth velocity at0 s( o5 f% J. m, C4 x
the follow-up visit. It is hoped that his final adult
' V2 ^; N: S, q8 ?, _height will not be affected., F/ g6 X; A6 O' N- w
Although rarely reported, the widespread avail-
5 ~6 W$ f( n _. u/ i# P {/ yability of androgen products in our society may
^/ v. p/ y* ]3 e3 W" uindeed cause more virilization in male or female X1 u' L( N' |
children than one would realize. Exposure to andro-8 ^7 O( b( Z/ _4 B! l7 }$ f
gen products must be considered and specific ques-
1 O$ @! {7 }& F3 f! T `tioning about the use of a testosterone product or7 g/ u* x* |' S5 ~1 m9 @
gel should be asked of the family members during
% D2 i9 ^, A8 {2 R- h! ~the evaluation of any children who present with vir-8 U) Z9 b1 R8 V3 A7 @
ilization or peripheral precocious puberty. The diag-" b5 R* n- |2 D; d2 a
nosis can be established by just a few tests and by
) _# ^$ Z) z/ c. rappropriate history. The inability to obtain such a9 l; i6 Z9 Z2 J& ]6 n
history, or failure to ask the specific questions, may( t. w. ]9 h8 \+ \) q1 I
result in extensive, unnecessary, and expensive6 O6 D* d9 g' D9 y
investigation. The primary care physician should be7 e' o3 v6 \7 q; D* u& k
aware of this fact, because most of these children! E C5 S$ f; G2 R( F( y
may initially present in their practice. The Physicians’2 i' K @" a% z. o% q. _# A
Desk Reference and package insert should also put a
! e/ c9 E' q4 \2 B0 mwarning about the virilizing effect on a male or; O% F+ b5 d! S" h4 P
female child who might come in contact with some-
' k- C- o/ x8 K( Gone using any of these products.
# ^+ ~3 `) B. P& Z6 g6 L( AReferences
1 `4 q5 H5 D$ S+ I+ t0 Q1. Styne DM. The testes: disorder of sexual differentiation$ h! @+ ^4 @+ i$ s3 F
and puberty in the male. In: Sperling MA, ed. Pediatric
6 o0 y* B- N+ j0 u1 f+ V3 u* b! mEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;. b8 ^8 A+ k! L( e/ D
2002: 565-628.* P) l( s! b" i- o1 x) M
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious2 a& \( t, M# ~4 m
puberty in children with tumours of the suprasellar pineal" ~1 T9 q& E. N
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' a" B8 K* x% R+ f( h2 ]Topical Testosterone Exposure / Bhowmick et al 543
5 o" L- g0 y6 t! r8 ]areas: organic central precocious puberty. Acta Paediatr.6 q, M7 d0 C: m: l2 _. q, q
2001;90:751-756.
: |1 y. l& F; r" u$ x3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
% n' a; q" F# MPediatric Endocrinology. 4th ed. New York, NY: Marcel5 y* u& j9 F* m7 h" n, K1 Y
Dekker Inc; 2003:211-238.1 x6 w: w# ^. p1 W: o$ _
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual- C5 v5 W4 Z# @: Z7 B6 g
development in a two-year-old boy induced by topical7 M# }1 I) P* [' }3 o
exposure to testosterone. Pediatrics. 1999;104:e23.
" e. c" w. K) m( q Y8 C+ k5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
) X: h0 b0 p- R# A, A/ Y3 K4 R6 wSkeletal Development of the Hand and Wrist. 2nd ed.; N; E1 m( S2 Z0 V) }. W
Stanford, CA: Stanford University Press; 1959.* ]) N8 a4 A! A3 C8 f
6. Physicians’ Desk Reference. Androgel 1% testosterone,
T/ \' t% q3 c DUnimed Pharmaceutical Inc. Montvale, NJ: Medical0 Z9 t: Y: V6 U6 E
Economics Company, Inc; 2004:3239-3241.
0 B0 Z2 o) f! `* n$ g" c7. Klugo RC, Cerny JC. Response of micropenis to topical
# P$ G, E8 w, s5 m+ Utestosterone and gonadotropin. J Urol. 1978;119:- x9 N2 G8 T" \4 `7 L: T+ K$ n
667-668.3 @4 e' U8 V9 C: h/ L/ z B: p
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