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is a significant concern for physicians. Central
! ~9 m( x' u0 L d6 w0 pprecocious puberty (CPP), which is mediated
" t( h" v0 Y5 y* K. k1 Y ~through the hypothalamic pituitary gonadal axis, has
5 [3 u8 n1 x7 W6 r0 M' U& F' [7 Va higher incidence of organic central nervous system
+ k# o# T A A; S3 b. ]lesions in boys.1,2 Virilization in boys, as manifested
; H! S9 g$ w+ r P% E, l5 C' fby enlargement of the penis, development of pubic& H% B+ v/ r. d9 J* ~
hair, and facial acne without enlargement of testi-
: Q' k1 X h$ mcles, suggests peripheral or pseudopuberty.1-3 We
& }6 ^ B9 l. N9 u6 L8 lreport a 16-month-old boy who presented with the
& ^" {- e: {1 w, [% Tenlargement of the phallus and pubic hair develop-! O3 X Q6 ]* ]1 J5 w/ T8 g
ment without testicular enlargement, which was due. P9 o1 i1 s0 k( J3 x
to the unintentional exposure to androgen gel used by2 v6 x1 ]' f2 r4 P; A$ o& |8 m
the father. The family initially concealed this infor-
) K' c) M2 {, S) J% @mation, resulting in an extensive work-up for this# g' u6 h7 I* y5 c4 A
child. Given the widespread and easy availability of1 O( _) ?7 n- O8 }: k! x4 |1 K) M
testosterone gel and cream, we believe this is proba-
4 {) ~9 l; I& Z+ H0 xbly more common than the rare case report in the
# p" @0 _$ q8 S7 K! I e# Mliterature.4
3 ^& T8 p$ h$ T" f1 jPatient Report' T- |- s6 R0 P0 ~4 S; ~' `
A 16-month-old white child was referred to the6 s1 n0 K) E7 D) K1 K
endocrine clinic by his pediatrician with the concern
7 J& j5 Q8 F- ~; _! Pof early sexual development. His mother noticed! C0 k8 W4 w* T2 X1 H6 Q
light colored pubic hair development when he was4 P* v {. t4 ?& M! A) H) B
From the 1Division of Pediatric Endocrinology, 2University of
8 k" {# \. `& f% R0 ASouth Alabama Medical Center, Mobile, Alabama.( G% H" h- D; E- k
Address correspondence to: Samar K. Bhowmick, MD, FACE,
$ w5 q1 K' L$ Y' @6 ~5 ZProfessor of Pediatrics, University of South Alabama, College of( Z5 j* l! J6 a
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 ~; Q1 o' v' e# C% |e-mail: [email protected].( i' M5 n3 z( s& F, x4 r
about 6 to 7 months old, which progressively became3 [6 a; \ w6 ]
darker. She was also concerned about the enlarge-: W" E7 R8 Z" q$ w, {: f5 u
ment of his penis and frequent erections. The child7 W; k7 k0 ]. D
was the product of a full-term normal delivery, with
" x" q9 j2 q+ u8 v& `+ `- k8 [1 Qa birth weight of 7 lb 14 oz, and birth length of) l6 p! |& B2 S% s
20 inches. He was breast-fed throughout the first year
; ~2 J7 |9 u4 j% j# G+ \: Uof life and was still receiving breast milk along with
~& z. C- Z' Y8 S" _solid food. He had no hospitalizations or surgery,
* w* E9 W# t% e( v h( D4 qand his psychosocial and psychomotor development
; f/ W7 C0 V6 f( g, ^was age appropriate.
& H) e) W5 E( x5 _The family history was remarkable for the father,( G$ l f' R- a) `. b; [
who was diagnosed with hypothyroidism at age 16,3 n7 l8 l) f6 a7 `
which was treated with thyroxine. The father’s$ |4 h0 E' k! v) R2 u8 `# U
height was 6 feet, and he went through a somewhat
b# [' C8 C6 |& Kearly puberty and had stopped growing by age 14.# }) \' ]& g" _$ C# {- n
The father denied taking any other medication. The- C1 P" H! G% F
child’s mother was in good health. Her menarche
6 C) M4 b- _3 I* U0 J8 hwas at 11 years of age, and her height was at 5 feet
) H' o7 B3 F/ V+ B! T1 X5 inches. There was no other family history of pre-2 o8 t0 i0 ?, R6 |
cocious sexual development in the first-degree rela-
4 }4 [8 y* v0 m# ]tives. There were no siblings.
b+ e6 R( a/ U4 X! M" uPhysical Examination
4 k9 t8 o9 u% P2 T6 Y t; @The physical examination revealed a very active,
) q) L& a, S" S9 H" S& Eplayful, and healthy boy. The vital signs documented* b8 z# W- [7 M& i, T2 d6 Z5 [& |
a blood pressure of 85/50 mm Hg, his length was6 |5 |& i) H" w" g
90 cm (>97th percentile), and his weight was 14.4 kg
2 T3 s Y4 e! [ G(also >97th percentile). The observed yearly growth$ J* E# ]2 k2 v* W+ T" A/ M7 I
velocity was 30 cm (12 inches). The examination of
* `: d) P6 n: K" qthe neck revealed no thyroid enlargement.% l2 i0 ]3 a+ K6 a. z _; Q/ r
The genitourinary examination was remarkable for0 R: w) w! G* V5 M# u; {9 N; _
enlargement of the penis, with a stretched length of" V. Z+ I+ h+ b* o
8 cm and a width of 2 cm. The glans penis was very well
( U/ A( g6 l; Z7 h3 a8 adeveloped. The pubic hair was Tanner II, mostly around
! u* N4 M7 o, V" f4 m7 s540
( U$ P0 d( a, U; D; {: gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ ^; I& B+ v4 X- uthe base of the phallus and was dark and curled. The% { H/ h" q- S k: r) e$ }
testicular volume was prepubertal at 2 mL each.9 x, K: p. ?$ T* X" z$ t0 Y
The skin was moist and smooth and somewhat
0 z9 R* ?2 Z5 a; E {% Q+ Woily. No axillary hair was noted. There were no( E ]) |) \5 @: q% z6 u0 ], c
abnormal skin pigmentations or café-au-lait spots.8 m o( m K2 b# B' ~, j
Neurologic evaluation showed deep tendon reflex 2+% Y" k, U) h. u
bilateral and symmetrical. There was no suggestion
1 d- w2 Y7 v. j# B5 H# [of papilledema.
3 S" j& R8 h3 u P4 Y. eLaboratory Evaluation: m; a, b( S7 I! z
The bone age was consistent with 28 months by4 Q/ c/ h: A2 p6 Z
using the standard of Greulich and Pyle at a chrono-
) c4 N6 l4 f% s6 ]# U( ilogic age of 16 months (advanced).5 Chromosomal
! \" `6 f9 p akaryotype was 46XY. The thyroid function test
8 P4 t0 m1 p4 @* y2 H2 O, s2 Ishowed a free T4 of 1.69 ng/dL, and thyroid stimu-
2 W8 P" e* ^/ E6 t$ l5 d n3 qlating hormone level was 1.3 µIU/mL (both normal).) D: {% N, u2 e
The concentrations of serum electrolytes, blood2 V9 E/ q- j+ }/ s6 a
urea nitrogen, creatinine, and calcium all were
' J% i: L5 |1 U1 E8 b }3 D/ zwithin normal range for his age. The concentration- C3 Q) W( P/ }6 {9 B* A) |
of serum 17-hydroxyprogesterone was 16 ng/dL
' d( ]+ J& G l1 e- M2 e(normal, 3 to 90 ng/dL), androstenedione was 20
& L2 {! S4 p4 V* v" H2 Rng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
$ H+ y' E8 L# _ Sterone was 38 ng/dL (normal, 50 to 760 ng/dL),
, W9 \ |" m6 x& W! B- x; C; Pdesoxycorticosterone was 4.3 ng/dL (normal, 7 to j6 d; i3 {$ {& u3 L/ ^4 N
49ng/dL), 11-desoxycortisol (specific compound S); ^8 Z6 e% U7 F3 i$ w/ E5 z; }0 \" m/ g
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-) H4 k" e6 g ^2 ]7 p
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total- J ~( f- e# ?
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
9 ?2 g e/ w1 ?* t1 ~8 ]and β-human chorionic gonadotropin was less than
" S! c+ o" ^1 j' g- ^1 y5 mIU/mL (normal <5 mIU/mL). Serum follicular
5 ?" C, o$ _! R6 a( q5 dstimulating hormone and leuteinizing hormone
5 w f, c T1 ]9 q% {9 pconcentrations were less than 0.05 mIU/mL. N2 K' H, V# Y7 b3 N
(prepubertal).( {; i: t1 i: K2 a* ~- L8 W4 w, j6 C
The parents were notified about the laboratory
3 w4 z$ a# F# f$ n0 e8 qresults and were informed that all of the tests were
% n. ]9 ]! P* x- Q. ~# Vnormal except the testosterone level was high. The# U9 D/ I5 l: C. [
follow-up visit was arranged within a few weeks to& N1 v$ F/ b: l) Q
obtain testicular and abdominal sonograms; how-: z$ H' [% p& L- X
ever, the family did not return for 4 months.7 e% q, E$ }8 M
Physical examination at this time revealed that the
5 Z, g0 U- _) w- Echild had grown 2.5 cm in 4 months and had gained6 E0 {# l, |5 ]' G7 Z6 ^) `. f
2 kg of weight. Physical examination remained. e0 F6 C/ D& Y4 U+ p
unchanged. Surprisingly, the pubic hair almost com-
; R* H6 O. z* ]. U+ a9 Epletely disappeared except for a few vellous hairs at3 S! D+ u8 Q5 H* z# `# }
the base of the phallus. Testicular volume was still 2- y+ B' n ~! J: D7 K
mL, and the size of the penis remained unchanged.! ^* ]: T: b4 u7 o5 I: t
The mother also said that the boy was no longer hav-
8 W9 k- f6 ~# K/ j; E% S; ^; _ing frequent erections.4 l' _, d. D, z/ Y; r& A
Both parents were again questioned about use of ^4 M7 U. n0 v
any ointment/creams that they may have applied to
! t: c, K% h: e; @% d9 d, E4 q* zthe child’s skin. This time the father admitted the
* o5 g. v# }7 K* KTopical Testosterone Exposure / Bhowmick et al 541
. E3 h9 L+ |9 v: `+ K1 O3 y. E+ ruse of testosterone gel twice daily that he was apply-2 h: U) g) ?& o+ P+ j; b4 U7 H+ G
ing over his own shoulders, chest, and back area for' r4 [7 p3 V2 A# Q8 M: l9 _# w
a year. The father also revealed he was embarrassed
* r$ I6 F% V, j& ?to disclose that he was using a testosterone gel pre-1 s4 c1 t5 q4 f+ ]+ q& B
scribed by his family physician for decreased libido% U7 E6 ^3 K* q% O* V
secondary to depression.
8 j: l0 t& S$ ~2 v$ bThe child slept in the same bed with parents.
, F" e1 _, W. j& n# t/ tThe father would hug the baby and hold him on his w% W( K* T. f: {* A r) q
chest for a considerable period of time, causing sig-
) B1 o4 \9 I$ b1 g: q6 Z5 gnificant bare skin contact between baby and father.& R n0 Q |) E# ~8 b( U
The father also admitted that after the phone call,
) _* D1 e9 z& M5 n# o Q9 ]& Mwhen he learned the testosterone level in the baby
% q# ~$ C8 z, J0 @8 h1 ewas high, he then read the product information2 a R6 w* H7 i" g
packet and concluded that it was most likely the rea-
! P; _8 F# t0 O7 u% |" uson for the child’s virilization. At that time, they/ t _; U7 g; U' B
decided to put the baby in a separate bed, and the
' K: x# Y* X e7 ?$ r1 zfather was not hugging him with bare skin and had0 U* ^6 B+ a, c2 a5 D5 F3 b3 K" {
been using protective clothing. A repeat testosterone
5 n% B5 e! I4 [ r3 Ntest was ordered, but the family did not go to the7 M: O8 t( a0 K+ a
laboratory to obtain the test.
8 E/ p6 K6 u5 E& n0 {Discussion
3 q& [ N5 _- ^5 |Precocious puberty in boys is defined as secondary
7 d1 X v- H5 e$ s, ]( Esexual development before 9 years of age.1,47 p/ e4 X7 e8 N+ d0 V: C0 [5 P
Precocious puberty is termed as central (true) when
2 Q# B9 k) D w' }, o) `' K7 Lit is caused by the premature activation of hypo-0 c3 J$ Y- t% P3 {+ j
thalamic pituitary gonadal axis. CPP is more com-1 e, x/ e0 K% K( `! {6 z8 x
mon in girls than in boys.1,3 Most boys with CPP$ M0 a- `( v& |2 a) E
may have a central nervous system lesion that is3 y/ L" t4 i: P. {3 S( G
responsible for the early activation of the hypothal-
6 |& ~9 o3 W9 R9 j% {9 iamic pituitary gonadal axis.1-3 Thus, greater empha-# t' y; }: U, _0 P" n
sis has been given to neuroradiologic imaging in
- n1 \) R) _+ V0 j4 B j6 T* eboys with precocious puberty. In addition to viril-
% i6 {6 e- x0 Q( eization, the clinical hallmark of CPP is the symmet-
% l! X% l' V2 G4 j5 xrical testicular growth secondary to stimulation by3 {! }+ A. m: L+ t
gonadotropins.1,37 R8 g! b. e; r" r1 B4 Y
Gonadotropin-independent peripheral preco-9 b1 J8 A4 |- M6 G3 a
cious puberty in boys also results from inappropriate: R9 b2 T2 ]* r$ V4 x5 S8 s+ M! s
androgenic stimulation from either endogenous or) k3 n4 R+ I" O. b
exogenous sources, nonpituitary gonadotropin stim-5 q5 [0 K' m6 h; ^. I
ulation, and rare activating mutations.3 Virilizing
7 X% J/ s* u' c$ E( m( ocongenital adrenal hyperplasia producing excessive/ D3 _' e: N- @# M7 j
adrenal androgens is a common cause of precocious7 R+ k0 F- y* V+ C+ g4 P
puberty in boys.3,4
9 I6 D+ V! v ]0 TThe most common form of congenital adrenal1 Y% p9 B7 D/ W" D/ @2 R
hyperplasia is the 21-hydroxylase enzyme deficiency.5 P( j- k+ Z" N; k0 k+ L7 ]' `* N
The 11-β hydroxylase deficiency may also result in: A9 W- }3 g, o
excessive adrenal androgen production, and rarely,# W2 @# X, K: ?, Y
an adrenal tumor may also cause adrenal androgen/ Y0 ]1 z" \+ }+ W
excess.1,3
7 d& O3 m# @* J5 eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( J! \: D7 _2 x# N* y {( S
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
4 k4 ?% Q# ]; ^5 a7 e: L) X& K6 C0 vA unique entity of male-limited gonadotropin-
/ L) v0 N# h2 bindependent precocious puberty, which is also known
% n! F2 a# C/ \' _2 C- Gas testotoxicosis, may cause precocious puberty at a2 _ z& [7 ?) k Y5 t# ?2 N- k' q
very young age. The physical findings in these boys" F* R4 T& B8 o7 m2 p
with this disorder are full pubertal development, t" O) W( T: P
including bilateral testicular growth, similar to boys. e: _( p) P5 E+ Y y
with CPP. The gonadotropin levels in this disorder
% s- ?7 {+ K( w9 a3 Bare suppressed to prepubertal levels and do not show
; d% f2 Z% H( O! E+ A/ Rpubertal response of gonadotropin after gonadotropin-
) v( ? g! D, c; ]4 Mreleasing hormone stimulation. This is a sex-linked% j% o1 x4 r5 s8 W0 z: b
autosomal dominant disorder that affects only$ c0 d4 }* R0 j. r I8 C" B) ?
males; therefore, other male members of the family5 f5 q- L5 r8 ?! r0 R( K
may have similar precocious puberty.38 d. u4 A0 a% p
In our patient, physical examination was incon-
( g0 k* W$ |* p! }2 I7 n5 Fsistent with true precocious puberty since his testi-
% F- \9 E: K! W/ Tcles were prepubertal in size. However, testotoxicosis
8 I- v, l; _- ^* e7 x- X" j# R; \was in the differential diagnosis because his father
( i+ f2 T: T2 H" |+ Y" L7 M- B8 _started puberty somewhat early, and occasionally,
, m1 a1 p( w% K! D: G& o. ytesticular enlargement is not that evident in the+ W! e4 T" F/ s7 `# [
beginning of this process.1 In the absence of a neg-. G& U% {" a; q: V! r7 l% A
ative initial history of androgen exposure, our3 {, k3 ?8 k2 q: n& T) t! a. [- {
biggest concern was virilizing adrenal hyperplasia,
0 I. R# s5 G/ k) `6 d$ j2 \. j1 `" _. Oeither 21-hydroxylase deficiency or 11-β hydroxylase
. H- _7 W6 U5 g. B2 k7 jdeficiency. Those diagnoses were excluded by find-
2 ~( H$ J2 s/ Y, a% f) Ting the normal level of adrenal steroids.& p+ W3 X! ]) U. m, f
The diagnosis of exogenous androgens was strongly# u' ]8 |* T: v# @3 `1 O3 S& g
suspected in a follow-up visit after 4 months because
+ \$ d1 {/ O& v/ Athe physical examination revealed the complete disap-
, G( Q q S! a% s$ qpearance of pubic hair, normal growth velocity, and
) W# K, h. l- D+ ?8 cdecreased erections. The father admitted using a testos-
( Z/ K1 N! D" V2 }terone gel, which he concealed at first visit. He was
: S7 O$ x: w. S7 xusing it rather frequently, twice a day. The Physicians’
, J7 y' _1 C% B; c) z% w) T7 PDesk Reference, or package insert of this product, gel or
3 r5 L+ C: i5 i5 j7 G* E% mcream, cautions about dermal testosterone transfer to
# b. c2 w: V3 y) S, c7 E: Gunprotected females through direct skin exposure.
4 ^- h; D8 K& r- ~Serum testosterone level was found to be 2 times the5 k. \& }: g3 q. }
baseline value in those females who were exposed to5 m* N( S6 a6 I& ?( l
even 15 minutes of direct skin contact with their male2 ~! y8 l' t$ k0 G6 b9 [
partners.6 However, when a shirt covered the applica-9 n$ i; b7 w. G
tion site, this testosterone transfer was prevented.
4 p7 R* m$ e% O' HOur patient’s testosterone level was 60 ng/mL,
* Z: m* T" m$ ?" M5 x- Qwhich was clearly high. Some studies suggest that- n/ L) Z. K4 c! u3 J
dermal conversion of testosterone to dihydrotestos-+ \; w$ N3 B3 C& k* x& k( {$ q
terone, which is a more potent metabolite, is more
) ^0 v {- q/ S# J) t5 y. nactive in young children exposed to testosterone
$ z7 u( }3 S& h) lexogenously7; however, we did not measure a dihy-
* k- j8 J, ]) O ]drotestosterone level in our patient. In addition to5 K4 G& Q5 i" a6 i+ t, d; q7 F! A# S
virilization, exposure to exogenous testosterone in
0 v& C6 p5 I+ ]9 d4 cchildren results in an increase in growth velocity and
6 v4 T* }! r3 oadvanced bone age, as seen in our patient.7 X; S; K3 [+ ?! ~4 x" k
The long-term effect of androgen exposure during
+ U4 n( a0 v! T5 h: J- vearly childhood on pubertal development and final5 ^; z8 I3 _9 Y0 A
adult height are not fully known and always remain5 m f$ E7 A$ v" {1 ^7 {6 p) W
a concern. Children treated with short-term testos-
: O( @' m ?9 x- T# [8 |# U5 R6 Qterone injection or topical androgen may exhibit some& J3 _' i w q# F! O) r( }
acceleration of the skeletal maturation; however, after, J& y K9 @$ m
cessation of treatment, the rate of bone maturation
6 Q8 ~* @- C1 ^+ X/ E% u) E; h2 c5 v4 Tdecelerates and gradually returns to normal.8,9" r4 B' r9 _% p! A. g
There are conflicting reports and controversy
+ a3 }7 o& I7 [7 M1 Iover the effect of early androgen exposure on adult
+ V/ J7 u" Y9 F$ ?penile length.10,11 Some reports suggest subnormal' Y* O2 M( n+ u k( N8 A% ^% H, P
adult penile length, apparently because of downreg-
0 M: s) d# D3 x, Z7 L3 M6 pulation of androgen receptor number.10,12 However,9 w- I, @' Q2 b- a) U: q
Sutherland et al13 did not find a correlation between$ ^) G. [- v3 c: Y$ W2 N. L- {4 ]
childhood testosterone exposure and reduced adult
- y& ?! I& J. _) U1 y% h' Epenile length in clinical studies.
) E+ e, G4 _+ Z5 hNonetheless, we do not believe our patient is2 i9 w, l3 a3 r& n- l4 d
going to experience any of the untoward effects from3 i, Z' D$ r! }: F& G
testosterone exposure as mentioned earlier because3 F& d \" _8 R
the exposure was not for a prolonged period of time.! j; f5 I0 H; \5 r! |! s
Although the bone age was advanced at the time of$ I7 [: N1 g9 v# K) _
diagnosis, the child had a normal growth velocity at2 m. i5 {' j0 D! t% u/ c
the follow-up visit. It is hoped that his final adult* g% Y( B* x3 Z+ S
height will not be affected.1 Y0 p8 U5 Q L( e! p
Although rarely reported, the widespread avail-: u/ @. P5 c3 O# p5 I! |
ability of androgen products in our society may0 l2 K% ]' w; t
indeed cause more virilization in male or female
6 c d! J1 c3 o/ E4 D3 v8 q. i2 rchildren than one would realize. Exposure to andro-
1 j) S2 b5 j4 c$ igen products must be considered and specific ques-
! Z; c" w/ h! Wtioning about the use of a testosterone product or
* P0 j, x$ _& F1 fgel should be asked of the family members during5 C# j6 v( D8 x& N% i5 R7 \
the evaluation of any children who present with vir-* K1 r6 W# ^- q3 R. h0 K
ilization or peripheral precocious puberty. The diag-, X% s: V8 G- Q1 w
nosis can be established by just a few tests and by
8 S% |4 }. ^4 {' ?. b2 ^) fappropriate history. The inability to obtain such a/ z. z1 s. P% A, y9 \
history, or failure to ask the specific questions, may7 U% v; C% v, y/ C+ v
result in extensive, unnecessary, and expensive
1 e: }" ?2 u V& n* b+ Rinvestigation. The primary care physician should be
' _, R! D& \6 Z9 u( e5 h/ faware of this fact, because most of these children. K* ?$ s* l* X" J
may initially present in their practice. The Physicians’+ I. z3 _, K2 C, i3 U6 H
Desk Reference and package insert should also put a3 K+ P/ [! ?; _
warning about the virilizing effect on a male or6 Z u/ o6 t3 K, C# |: P7 d
female child who might come in contact with some-
, K& U4 R1 Z& o2 B. j6 b( a* uone using any of these products.
6 v3 e3 x c4 X1 J# I' q' NReferences' y, w8 k7 n3 q6 Q. @
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and puberty in the male. In: Sperling MA, ed. Pediatric
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2002: 565-628.: h9 J) d6 c# ]* i! r( B! c
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious/ D2 h u8 _2 v& ^7 h, `
puberty in children with tumours of the suprasellar pineal
! z4 ^+ E( X0 Y5 T. u `at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 p! y/ h- ^0 y3 {$ f" _
Topical Testosterone Exposure / Bhowmick et al 543
& K/ V# ^) e' {4 ~: h, Lareas: organic central precocious puberty. Acta Paediatr.
6 T8 z5 N, ], |5 L; t' a# ?5 k6 ?2001;90:751-756.
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Pediatric Endocrinology. 4th ed. New York, NY: Marcel+ B. {, ~. V0 Z# V5 Y6 g
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7 g- c. z/ P2 r8 N/ xdevelopment in a two-year-old boy induced by topical# S* J* k- s7 A! x. q. ^/ I7 B3 k# n
exposure to testosterone. Pediatrics. 1999;104:e23.
( M* p3 r7 E. c( t5. Greulich WW, Pyle SI, eds. Radiographic Atlas of2 _# Z$ q: _* T9 D9 y: O4 |* j
Skeletal Development of the Hand and Wrist. 2nd ed.
% n" w& \$ C) N* BStanford, CA: Stanford University Press; 1959.
3 @6 V# o$ ], s5 F* I; }* T6. Physicians’ Desk Reference. Androgel 1% testosterone,
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Economics Company, Inc; 2004:3239-3241.
* ?* T- a/ Y/ v+ ]$ z: _4 j7. Klugo RC, Cerny JC. Response of micropenis to topical; e+ R' @; u( J/ e
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