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is a significant concern for physicians. Central' _! J' X$ A! M& v! r
precocious puberty (CPP), which is mediated: k0 @- R$ L' g' ^# C5 \
through the hypothalamic pituitary gonadal axis, has% }; F' F. { ~" W$ g2 ~1 A9 M
a higher incidence of organic central nervous system% D/ k9 ~$ Y9 o @. U
lesions in boys.1,2 Virilization in boys, as manifested
+ r7 Y- K2 S, x Wby enlargement of the penis, development of pubic
5 |9 V$ y' a2 o ]( ihair, and facial acne without enlargement of testi-
) M% e5 l7 `% |( ^7 b L5 ]cles, suggests peripheral or pseudopuberty.1-3 We
' g; B: A1 u6 vreport a 16-month-old boy who presented with the. z; H8 Q- e$ b5 Y
enlargement of the phallus and pubic hair develop-7 o v3 Y U5 d2 S6 m, n, {
ment without testicular enlargement, which was due: v* d( r# u% E4 g+ v
to the unintentional exposure to androgen gel used by' Z: I0 e) `. u. y; t4 N
the father. The family initially concealed this infor-) Q2 g$ q, i+ ]
mation, resulting in an extensive work-up for this4 O; [ V2 m& ]5 `
child. Given the widespread and easy availability of& p3 {5 M3 d @& Q3 [
testosterone gel and cream, we believe this is proba-
, f+ l7 s/ B% A0 R5 D6 X# sbly more common than the rare case report in the c7 ` _* ~) r3 F! q
literature.4
7 I7 _' w! p: MPatient Report
6 l* a4 ^2 o% S8 BA 16-month-old white child was referred to the
" F$ v0 w4 N' F; p$ pendocrine clinic by his pediatrician with the concern
/ T4 L7 O& y% k1 y/ Y2 Zof early sexual development. His mother noticed
) O- `5 |, y& E/ C; |! X! ulight colored pubic hair development when he was1 x% N6 E) g: e$ N. X' J
From the 1Division of Pediatric Endocrinology, 2University of
/ a/ Y# R' W3 M$ l% J( |2 oSouth Alabama Medical Center, Mobile, Alabama.$ t9 g K1 p. E/ q3 { U6 u
Address correspondence to: Samar K. Bhowmick, MD, FACE,
9 K9 ]# l( a+ j) TProfessor of Pediatrics, University of South Alabama, College of
/ S1 N( Y" p5 ~& N) c1 mMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;& V m2 `" H; N5 Z8 r
e-mail: [email protected].
# {8 H T! W- J4 `4 }$ p% Uabout 6 to 7 months old, which progressively became
' \- T3 q& s( n* H" N- w3 ydarker. She was also concerned about the enlarge-6 b' `" O: t( h6 p% R( h# i' v9 J
ment of his penis and frequent erections. The child
& M0 p K! e8 q( ~was the product of a full-term normal delivery, with
: g# D& E: E4 c7 |2 w A/ Fa birth weight of 7 lb 14 oz, and birth length of8 U: l! e% S5 Z5 {/ \3 r+ V$ \
20 inches. He was breast-fed throughout the first year6 @! L- V1 x! o0 A0 x* ?6 }
of life and was still receiving breast milk along with
& `! ^% w! U8 @( ysolid food. He had no hospitalizations or surgery,% u0 ]/ W8 `2 s5 e
and his psychosocial and psychomotor development6 C1 q" h, }& `# s/ }) f% L$ |
was age appropriate.0 W4 W3 @1 I: N' N4 D$ u _
The family history was remarkable for the father,
+ `4 ~3 U! \; hwho was diagnosed with hypothyroidism at age 16,
3 p4 Q1 L! M. j Q; {/ O8 dwhich was treated with thyroxine. The father’s
- u- I+ p. L2 q, Rheight was 6 feet, and he went through a somewhat; u. b# I2 y, R% a7 g
early puberty and had stopped growing by age 14.
6 r5 s0 t- p& V9 k1 C( vThe father denied taking any other medication. The
# o0 L0 `' j0 {% X6 a( E. Ochild’s mother was in good health. Her menarche
/ h9 k! F7 s) J! _was at 11 years of age, and her height was at 5 feet. J$ t% L/ Q T
5 inches. There was no other family history of pre-
$ {3 M' m0 r) ]- vcocious sexual development in the first-degree rela-8 B5 U0 P9 Q2 n" @( t6 j, ]
tives. There were no siblings.
, y5 B b3 X: w2 q% A4 |3 f. TPhysical Examination
9 y9 i) ^$ K) L9 D% y. j0 FThe physical examination revealed a very active,5 ?) i0 ]) A& z7 x, D. G
playful, and healthy boy. The vital signs documented9 D' G; v! b: h/ z. u. {1 w# I
a blood pressure of 85/50 mm Hg, his length was
* X( }( T. D% k* @7 i3 a$ |7 h5 n& H90 cm (>97th percentile), and his weight was 14.4 kg T' o( h$ ~2 R2 y, M5 w
(also >97th percentile). The observed yearly growth
+ ^' p1 W6 B' @- c+ S2 Avelocity was 30 cm (12 inches). The examination of* J! }3 ~ U# V1 [$ B) {
the neck revealed no thyroid enlargement.$ d; u' ^1 |) V, i B2 V" v. w7 x8 l
The genitourinary examination was remarkable for
: _+ j" x0 n" m/ F8 s1 Lenlargement of the penis, with a stretched length of" @- F! h, `% W' Q u" n* a
8 cm and a width of 2 cm. The glans penis was very well4 u6 G) v( `/ l* w
developed. The pubic hair was Tanner II, mostly around
* E5 d- u6 y# x# j: |2 ~540! L7 A8 a$ r" [- K% N$ r' n+ @
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ U! J/ f4 B" d4 Z: S8 ~, Y/ K0 U0 Q" \
the base of the phallus and was dark and curled. The) a( _; z3 I1 r* X$ S0 `& T( c
testicular volume was prepubertal at 2 mL each.
0 A" d/ n' Q: j7 k7 O+ hThe skin was moist and smooth and somewhat7 X+ s2 Q0 R. o' D. |8 R
oily. No axillary hair was noted. There were no
) x5 p% ~2 \, G, q( |; Xabnormal skin pigmentations or café-au-lait spots.9 l9 Z6 p: u c5 ~# U% c
Neurologic evaluation showed deep tendon reflex 2+
( @0 @5 E3 Q/ G. m: G1 u" K; pbilateral and symmetrical. There was no suggestion
$ @9 m, ~5 n7 Q/ ]/ W1 t' k+ Xof papilledema.
& s; e8 H$ X* \ c0 b# j9 y9 _Laboratory Evaluation
K% u+ G l$ T4 @0 {7 ]$ eThe bone age was consistent with 28 months by& v. o0 C3 ~8 D u+ n9 h" p
using the standard of Greulich and Pyle at a chrono-# n: N, z1 {4 v5 u$ N/ O
logic age of 16 months (advanced).5 Chromosomal1 k6 g- {3 s. ]
karyotype was 46XY. The thyroid function test( \ R% V3 G" H a% ]2 ~: i
showed a free T4 of 1.69 ng/dL, and thyroid stimu-# o. N3 n( _% c$ i# X5 s
lating hormone level was 1.3 µIU/mL (both normal).7 o9 K; g. k3 f. B# ]( e+ n
The concentrations of serum electrolytes, blood
6 V8 H; p, j* I' i" Y6 r4 y# hurea nitrogen, creatinine, and calcium all were
: M; j* o% v9 K C& W0 qwithin normal range for his age. The concentration- ~+ p$ L/ i0 V# @1 A. `! p. Q r
of serum 17-hydroxyprogesterone was 16 ng/dL
5 J: P8 ], {2 ~/ _6 R(normal, 3 to 90 ng/dL), androstenedione was 202 y8 m* e2 `( Q& p
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
6 e. }2 C Z5 j+ p0 Tterone was 38 ng/dL (normal, 50 to 760 ng/dL),
! [( h8 s4 h+ y0 d" T4 `desoxycorticosterone was 4.3 ng/dL (normal, 7 to
) S ^$ ?" Q3 b5 P3 u49ng/dL), 11-desoxycortisol (specific compound S)2 h! r; V8 @3 O% w$ [8 q
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-( s: w5 L9 B+ z+ v" T1 A
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
! J9 B' K$ _% Q: l/ Ttestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
7 E9 i! w" f+ e1 a* V7 Mand β-human chorionic gonadotropin was less than
! H. o* ~4 H: u3 U: z& A, v* E5 mIU/mL (normal <5 mIU/mL). Serum follicular
3 {2 [9 P8 F Y' kstimulating hormone and leuteinizing hormone
" g l' E% x. B! r# J; cconcentrations were less than 0.05 mIU/mL! v: R6 [0 L0 u; P; o3 m$ J
(prepubertal).; X8 X+ C9 i: z5 l" M8 ^% S
The parents were notified about the laboratory6 c2 q1 y2 y+ |: }' i9 K
results and were informed that all of the tests were+ ~2 \& Q: A, f+ T
normal except the testosterone level was high. The/ m( o$ z3 h( ^
follow-up visit was arranged within a few weeks to; B0 E K) P3 t0 |" H& O% A9 }
obtain testicular and abdominal sonograms; how-
5 o5 Y3 A6 f e: H8 J) a+ s: K; jever, the family did not return for 4 months.: ?) f( n: f) V+ G; J
Physical examination at this time revealed that the( h0 ]4 e' L6 v2 t
child had grown 2.5 cm in 4 months and had gained
, y0 y: D) I5 r% ]4 _( I2 kg of weight. Physical examination remained# x/ U6 r; | w
unchanged. Surprisingly, the pubic hair almost com-) ]5 L2 k9 W& x# W6 _- x3 E
pletely disappeared except for a few vellous hairs at! ~; x3 @1 Z; X
the base of the phallus. Testicular volume was still 22 h/ L" x$ j& P8 }) _
mL, and the size of the penis remained unchanged.
$ T M; ]# G4 S1 V/ S0 P8 kThe mother also said that the boy was no longer hav-$ A( b+ A; s2 H9 _" T
ing frequent erections." c4 {& G5 t& \# G. o: _% L& ~( S
Both parents were again questioned about use of
7 A0 O8 ~$ d( lany ointment/creams that they may have applied to
5 t- h4 I( Z! wthe child’s skin. This time the father admitted the
: p& u) E3 W2 T6 bTopical Testosterone Exposure / Bhowmick et al 541
# L; P8 }) J1 m: ?# tuse of testosterone gel twice daily that he was apply-5 t/ A* `5 u6 _5 v U
ing over his own shoulders, chest, and back area for. q, x8 D3 J7 L! @
a year. The father also revealed he was embarrassed! N% G3 N2 ~5 B
to disclose that he was using a testosterone gel pre-
0 Y: l. v2 n: e- b2 X3 ?scribed by his family physician for decreased libido+ T. n% A4 n5 P6 y
secondary to depression.
% R3 p; f. z( z8 g% Q2 K- \1 ]$ YThe child slept in the same bed with parents.0 f2 |5 U* p9 K. _5 U! v5 p
The father would hug the baby and hold him on his: a* d+ W- v8 w1 O3 p% b8 a6 `7 D+ Y/ ~
chest for a considerable period of time, causing sig-5 n: N8 S8 ?& N4 v
nificant bare skin contact between baby and father.
* c, H p% D1 CThe father also admitted that after the phone call,
: [" X" K1 ~8 Q3 ], P- rwhen he learned the testosterone level in the baby
. M& j1 N( q% `" P$ P/ D h! r; awas high, he then read the product information
; r! d; e- O2 X- ]( y3 O6 Q7 o! V) {9 F0 hpacket and concluded that it was most likely the rea-
3 e+ T9 K5 `$ `* M: _son for the child’s virilization. At that time, they
) h$ F# z% Y/ w: I) G7 hdecided to put the baby in a separate bed, and the
7 t3 s( q0 k; [& g) l" d, g sfather was not hugging him with bare skin and had
" z! x7 [. Q# lbeen using protective clothing. A repeat testosterone/ ^' R( u2 u5 `6 t' P
test was ordered, but the family did not go to the) _ w C9 N8 _0 Y
laboratory to obtain the test.
5 c6 s7 N( a0 h$ gDiscussion
! B' E8 X. M1 o1 @Precocious puberty in boys is defined as secondary3 m" Q6 L! ]% r) ]% s `
sexual development before 9 years of age.1,4
" a4 J1 d" _* `$ IPrecocious puberty is termed as central (true) when" W& ?. A' |! U3 [& R2 C1 U
it is caused by the premature activation of hypo-
: m: ?6 F, g6 Vthalamic pituitary gonadal axis. CPP is more com-
. v3 d" F0 Q5 D2 vmon in girls than in boys.1,3 Most boys with CPP7 @2 _& V! I R9 K
may have a central nervous system lesion that is
0 K0 l: `3 [ }$ dresponsible for the early activation of the hypothal-* R. H7 e0 l% k$ C# V4 }
amic pituitary gonadal axis.1-3 Thus, greater empha-+ {: T$ S# i0 a+ r: ^* ^
sis has been given to neuroradiologic imaging in
% t% T7 q& f2 X7 U, k1 \- J+ Tboys with precocious puberty. In addition to viril-
# U/ u# L' v, o' B9 ^ization, the clinical hallmark of CPP is the symmet-
6 |3 T$ B& g% ?6 ~4 }% v4 }" orical testicular growth secondary to stimulation by/ m, C$ P9 T7 k: I( z1 `/ y
gonadotropins.1,3# ?' L( o7 N" `. Z( f* U
Gonadotropin-independent peripheral preco-
% O8 i$ O/ Q; r! @) qcious puberty in boys also results from inappropriate
" \) g. V6 j0 m6 i) m" vandrogenic stimulation from either endogenous or
8 ]% A h1 M( \! W6 Eexogenous sources, nonpituitary gonadotropin stim-
( r/ S9 l" r( O% H3 Qulation, and rare activating mutations.3 Virilizing
- I2 p' h* d* O/ jcongenital adrenal hyperplasia producing excessive
& f0 F1 }/ C& Madrenal androgens is a common cause of precocious
2 G- l) { w- Y9 k& dpuberty in boys.3,4
0 [+ l* d* J" |6 Y7 a8 DThe most common form of congenital adrenal- J7 q# _) k6 j8 E4 m
hyperplasia is the 21-hydroxylase enzyme deficiency.
. K0 O5 g3 x9 @" Q2 O' K' RThe 11-β hydroxylase deficiency may also result in" g- ^8 g! X- S, |
excessive adrenal androgen production, and rarely,$ z- Y6 T: C: s$ Y
an adrenal tumor may also cause adrenal androgen
, N$ Z. a+ t3 Z, I) rexcess.1,3
3 j; N( J% B) ^5 y: x* G( y/ _ O _at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ |) U5 N2 \! V- r; t0 S542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
3 I1 ?& p: u% u1 ^3 T4 G7 g1 B7 t8 EA unique entity of male-limited gonadotropin-
1 u; ~% e, v$ a. a, F' |6 Rindependent precocious puberty, which is also known0 A) J" O7 e' T
as testotoxicosis, may cause precocious puberty at a
% P2 x& {- w8 L7 i% A: `9 A( X1 hvery young age. The physical findings in these boys
0 R( a' e9 ?" }! w- V) Q& Awith this disorder are full pubertal development,& x% J4 B/ p) F' }: a: G: U
including bilateral testicular growth, similar to boys) C+ S7 F1 _" U( A9 Y7 }
with CPP. The gonadotropin levels in this disorder
. C/ `) R" T$ M/ E1 ]+ Nare suppressed to prepubertal levels and do not show
' X$ v( b/ y/ ] [pubertal response of gonadotropin after gonadotropin-0 n0 c) L. W( _
releasing hormone stimulation. This is a sex-linked! `( n/ I' N( K9 L1 P) u2 ~: z
autosomal dominant disorder that affects only
) ]. S1 C% z9 F* l% `- ymales; therefore, other male members of the family2 R5 L& K3 o ^1 n) ?! A" P
may have similar precocious puberty.3
- x' {( A- a$ ^: r3 {% KIn our patient, physical examination was incon-/ Y6 K* q7 a6 B0 }
sistent with true precocious puberty since his testi-
4 \% H. C; } J& g6 _3 p4 _cles were prepubertal in size. However, testotoxicosis6 w# K2 m- e; r S; {, P R* j
was in the differential diagnosis because his father
, l6 M- n! U* }* k wstarted puberty somewhat early, and occasionally,: D0 e; r8 k+ S: d
testicular enlargement is not that evident in the# ?- S% V2 a/ J7 |
beginning of this process.1 In the absence of a neg-
5 {# K$ a7 u/ ~( wative initial history of androgen exposure, our2 U# B M; B0 E0 H- k0 c" [- A
biggest concern was virilizing adrenal hyperplasia,
\6 k& x9 U9 I2 C( K7 d/ G+ feither 21-hydroxylase deficiency or 11-β hydroxylase9 X2 {( C6 k5 F( Q4 W# U, A
deficiency. Those diagnoses were excluded by find-
8 Y l* } @9 k, Aing the normal level of adrenal steroids.6 `- Z' K8 I9 _9 g5 Y. |
The diagnosis of exogenous androgens was strongly
! w( I5 p1 f- X$ Hsuspected in a follow-up visit after 4 months because" i- O& s& i1 S7 f' h2 z' g1 e
the physical examination revealed the complete disap-
2 w: |6 u, k: A( npearance of pubic hair, normal growth velocity, and
' p! J+ M3 j2 gdecreased erections. The father admitted using a testos-
- _8 y7 o4 I7 A* _6 W- y1 P$ z' L/ xterone gel, which he concealed at first visit. He was
1 q4 m$ O& W9 K$ s* I' S% ]using it rather frequently, twice a day. The Physicians’
1 t j; k0 y9 T5 s: t: xDesk Reference, or package insert of this product, gel or/ F8 s5 H9 j5 C! |) Z. M
cream, cautions about dermal testosterone transfer to+ \9 X) I! `' y% W
unprotected females through direct skin exposure.6 w% L! V- D5 p/ c4 H6 E
Serum testosterone level was found to be 2 times the* F) Z7 q; @/ ?4 u0 y
baseline value in those females who were exposed to
" X* g; {* f4 {( c6 Xeven 15 minutes of direct skin contact with their male
0 v, n9 m% s+ }! j# ]partners.6 However, when a shirt covered the applica-
{+ V( T+ Y6 Mtion site, this testosterone transfer was prevented.; E# s4 |7 g/ G
Our patient’s testosterone level was 60 ng/mL,' `# M1 d; {7 w( E6 `' T* i
which was clearly high. Some studies suggest that
3 l M+ q) M9 ], L6 x5 `dermal conversion of testosterone to dihydrotestos-; v: S& E. T* @! L- C
terone, which is a more potent metabolite, is more, z3 U- n3 d+ F s8 m; l- l3 g) r
active in young children exposed to testosterone
; j1 v; [+ C* Y% ?& U6 v; Xexogenously7; however, we did not measure a dihy-
4 Y- b1 i0 L1 u1 H7 y: fdrotestosterone level in our patient. In addition to% K# S8 Q1 T! V( l
virilization, exposure to exogenous testosterone in2 b6 u8 e% V3 ^' O- H9 b
children results in an increase in growth velocity and
% n) B- F+ L# {# \6 oadvanced bone age, as seen in our patient.2 |, V# D% o3 r0 o# r
The long-term effect of androgen exposure during
$ L0 G: O% I$ j4 Y+ |7 pearly childhood on pubertal development and final
- [8 [, _( t' c* @+ j$ x0 x0 Sadult height are not fully known and always remain
. W* q/ j: y( c+ r* Na concern. Children treated with short-term testos-: g l+ h0 R' b% `5 ?1 f
terone injection or topical androgen may exhibit some; o& {, `: @- t, k: _
acceleration of the skeletal maturation; however, after' E: u @& K% q5 G
cessation of treatment, the rate of bone maturation$ q6 | ^! I" J4 y2 l
decelerates and gradually returns to normal.8,9) S6 r G& O( P4 W% ]
There are conflicting reports and controversy+ q9 p- o; q. ^; a. X
over the effect of early androgen exposure on adult
* d* _4 |9 }4 n! R6 Bpenile length.10,11 Some reports suggest subnormal. T; X, C* \: j1 e3 ]" c
adult penile length, apparently because of downreg-4 c, U' O. ]$ f
ulation of androgen receptor number.10,12 However,) x, |5 m- I7 H
Sutherland et al13 did not find a correlation between+ j% L+ W2 L( V. {. i
childhood testosterone exposure and reduced adult/ \: h1 S$ z$ a' s- Q% i! O
penile length in clinical studies.* x( h0 W# \' V6 p1 l
Nonetheless, we do not believe our patient is' z5 F% X% o3 {! j2 i/ ~$ g
going to experience any of the untoward effects from
7 b6 E* Z, ]3 e+ C6 s( N/ Ntestosterone exposure as mentioned earlier because% Z5 g) v M& S X: l
the exposure was not for a prolonged period of time.# e H. G6 o. v* Z) q" e( {( G
Although the bone age was advanced at the time of8 x" v: Z- }& S7 A5 K
diagnosis, the child had a normal growth velocity at
# u. J2 d. n% G1 v# ?the follow-up visit. It is hoped that his final adult
) \. z/ G' T) h' D) J- F& Mheight will not be affected.9 j& C, \9 |$ D* H' H: B# ~
Although rarely reported, the widespread avail-# W" O% x9 {% G' W# [4 z6 \
ability of androgen products in our society may
{& t+ o, F, j0 _) j7 F( n4 ? Dindeed cause more virilization in male or female
/ L/ w" ~: W* \children than one would realize. Exposure to andro-0 o4 O2 K3 F- G
gen products must be considered and specific ques-& ?$ M+ H1 |# `$ ^6 P1 ^; J4 G
tioning about the use of a testosterone product or
& C4 i; U _# |6 w) jgel should be asked of the family members during
* T( P" Z B$ I& W0 m4 ]7 f' _: ` t8 sthe evaluation of any children who present with vir-& z5 e( d# l6 |
ilization or peripheral precocious puberty. The diag-/ {1 _. B# e; r" i n. g! S/ i9 ^
nosis can be established by just a few tests and by K! ?' E( P' f/ o
appropriate history. The inability to obtain such a
+ {( T/ P4 I2 ohistory, or failure to ask the specific questions, may" [5 P/ U2 m' j5 M, V; {
result in extensive, unnecessary, and expensive6 O7 k( B" p1 Y+ z0 p
investigation. The primary care physician should be
3 ]9 i6 S4 [2 [$ f; O+ J0 haware of this fact, because most of these children
4 z! G* |) U8 _) l# P, P8 pmay initially present in their practice. The Physicians’* j( J" J$ | _" b8 `9 V
Desk Reference and package insert should also put a* k; H) O0 m+ Y$ |8 K
warning about the virilizing effect on a male or7 d" |# t; {; B% ^6 e; W
female child who might come in contact with some-% X% Y! C" g6 m
one using any of these products.
) C2 [7 M9 l* JReferences- K6 f7 O n: ^9 y4 w9 `' O, f) L
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/ ^9 h( m: u' uand puberty in the male. In: Sperling MA, ed. Pediatric+ R M* {; [- F0 w% U1 U7 f
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;3 A% w. o) s! C: z2 `! ~/ E
2002: 565-628.1 j- ~7 @8 Z, u' M& v
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious7 Y* o5 d b4 F3 _) r d3 h
puberty in children with tumours of the suprasellar pineal8 w& ]9 N7 }" g- j5 R; O& ?+ o3 J
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Pediatric Endocrinology. 4th ed. New York, NY: Marcel! s% Y! N; ~ Y- D- S' S0 }# I
Dekker Inc; 2003:211-238.
; k6 x% f+ N! M J4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
( K" D# N5 I+ V4 f; ~: s! M' Ldevelopment in a two-year-old boy induced by topical8 p- R! d8 K$ B1 M) Z, o
exposure to testosterone. Pediatrics. 1999;104:e23.5 R6 ]2 |1 L" D7 G, z
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
3 `. X1 e/ N, B+ `3 |/ |0 iSkeletal Development of the Hand and Wrist. 2nd ed.
: b& Q8 k% x9 f- k. m9 `Stanford, CA: Stanford University Press; 1959.& l1 h1 b) C) Y0 k6 X1 S
6. Physicians’ Desk Reference. Androgel 1% testosterone, q+ ^% x7 F( [7 y ]( X. f
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Economics Company, Inc; 2004:3239-3241.) s2 x" r8 q0 E7 k, @ P- k
7. Klugo RC, Cerny JC. Response of micropenis to topical: K2 v5 T6 j% k' N* d/ ~7 A
testosterone and gonadotropin. J Urol. 1978;119:. ?/ W% x* j' n# i9 ]1 B' a
667-668.+ h0 ^4 B; Z' _5 {4 ^- T
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