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is a significant concern for physicians. Central
& O3 s. V/ w( O+ I' e) U& e6 o% r0 Fprecocious puberty (CPP), which is mediated4 B. g8 k i3 ?* @' G) C
through the hypothalamic pituitary gonadal axis, has
, K0 J# e3 V \6 ia higher incidence of organic central nervous system: ~/ U4 \: \8 X; U' o" [) E5 ]
lesions in boys.1,2 Virilization in boys, as manifested* s8 y8 ^2 l+ u" W, b. H$ `$ a
by enlargement of the penis, development of pubic
' ^; k) u$ x1 s) Zhair, and facial acne without enlargement of testi-
7 v% O3 b8 B: c k- }7 Gcles, suggests peripheral or pseudopuberty.1-3 We4 E: Q! p$ I D2 Z, y
report a 16-month-old boy who presented with the" k* [, V" v# ?& \
enlargement of the phallus and pubic hair develop-
9 ^5 [* m' _4 A% [3 wment without testicular enlargement, which was due( Q% `. c# O9 Y) x1 v8 T
to the unintentional exposure to androgen gel used by
9 r! b! K( x1 B( O3 e+ j; Qthe father. The family initially concealed this infor-
( c2 B% Q4 U5 t0 Tmation, resulting in an extensive work-up for this
: M; C3 k; p0 z; Pchild. Given the widespread and easy availability of* q1 _* M# |$ n9 e) |
testosterone gel and cream, we believe this is proba-
5 h w$ Y' e6 X7 f fbly more common than the rare case report in the
* P2 b$ n* l% G- Rliterature.4# O" Y0 [% f* P% @
Patient Report
- x' F2 y# I; ]5 Z% C* BA 16-month-old white child was referred to the9 k) n. z% t4 w6 I+ p Y# ?, P
endocrine clinic by his pediatrician with the concern
/ f: t7 M* O6 X- _ Q, D9 @of early sexual development. His mother noticed; K& X- m5 j; ~& |
light colored pubic hair development when he was: a- p$ B7 H; C6 u! ^& E6 z; J
From the 1Division of Pediatric Endocrinology, 2University of( W5 T% r' C' A
South Alabama Medical Center, Mobile, Alabama.
7 q, D+ A; H) k" c zAddress correspondence to: Samar K. Bhowmick, MD, FACE,
; N3 L3 Y, ` I; l3 L# x' nProfessor of Pediatrics, University of South Alabama, College of
a7 d R$ t% h: T* ~" U, tMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
0 k4 Z5 [8 K% @+ M; ie-mail: [email protected].
: u# D9 q8 e& k/ \0 D* ]about 6 to 7 months old, which progressively became
2 x4 g( e+ M2 N; H) l# B. ?) Tdarker. She was also concerned about the enlarge-
& L3 E/ Z4 d4 g9 L4 Oment of his penis and frequent erections. The child
; Z# } i9 w- i- O& q+ c) A0 b$ Pwas the product of a full-term normal delivery, with
4 ~( q# ]: k$ ^6 m5 d( pa birth weight of 7 lb 14 oz, and birth length of8 Q6 |; J: K v0 B
20 inches. He was breast-fed throughout the first year
$ U2 C5 B/ j! I$ T" v$ A9 c; Vof life and was still receiving breast milk along with* m* v% n( F" ?) T: S
solid food. He had no hospitalizations or surgery,: p/ F& y! V9 e1 t3 O1 X- i& N
and his psychosocial and psychomotor development
: w3 J- q; r: i uwas age appropriate.9 Y& R5 P( w: c4 X; k" E0 t1 T
The family history was remarkable for the father,
* G0 G U# L- ~5 n5 O: cwho was diagnosed with hypothyroidism at age 16,
5 {1 x6 V6 C7 P. y" Owhich was treated with thyroxine. The father’s" B4 \% u2 U K9 u: }8 n9 q3 @
height was 6 feet, and he went through a somewhat4 ~1 s$ v: t- Z( v6 W
early puberty and had stopped growing by age 14.
9 z& A! b% |4 d. N2 l ~The father denied taking any other medication. The
- _/ w+ P9 W( c' ^$ p1 rchild’s mother was in good health. Her menarche% X# }6 ~" F' g6 D2 U5 W
was at 11 years of age, and her height was at 5 feet2 z# k" Q/ W# K6 r0 A4 }$ J
5 inches. There was no other family history of pre-
, `$ V" G1 Z" W, s; [* ^, Scocious sexual development in the first-degree rela-$ q& D4 k- X$ Y$ ~6 l
tives. There were no siblings.; v# t# M- E, \# D
Physical Examination
$ D U! |" s' T' [: R# {" V7 R- |The physical examination revealed a very active,
4 P$ X- |0 R, i lplayful, and healthy boy. The vital signs documented+ V% \7 D$ H, k
a blood pressure of 85/50 mm Hg, his length was" } {$ u- D; ?% O
90 cm (>97th percentile), and his weight was 14.4 kg# a# T5 n$ s$ S- J
(also >97th percentile). The observed yearly growth& }) R) }$ h$ x+ U& Z9 ?
velocity was 30 cm (12 inches). The examination of2 ~ }) a/ l# Y; r
the neck revealed no thyroid enlargement.
4 m5 b& F$ Z9 T* s P0 ]6 \The genitourinary examination was remarkable for6 Y. z1 u% c5 A f% L
enlargement of the penis, with a stretched length of* v0 |4 ^# O6 y1 l; h
8 cm and a width of 2 cm. The glans penis was very well% x: l# V6 A( @$ p; H: ^) P+ @( J
developed. The pubic hair was Tanner II, mostly around A: v8 C6 Z9 V3 k M% T5 z% g
5407 p* v3 f- i0 t6 h6 L
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' a7 o$ j) U' ?: e
the base of the phallus and was dark and curled. The2 @$ V1 k2 _% w' h4 X
testicular volume was prepubertal at 2 mL each.6 F. h i, F3 E8 D
The skin was moist and smooth and somewhat
( \. P. ]6 X. Z4 V$ voily. No axillary hair was noted. There were no
4 Q" z+ A% }" {2 b. _/ W* S" Tabnormal skin pigmentations or café-au-lait spots., E& w9 ~, Q% @9 ?3 b" C
Neurologic evaluation showed deep tendon reflex 2+/ E v9 i' s: h
bilateral and symmetrical. There was no suggestion
; N+ ^/ r3 m i& m! c& Jof papilledema.
% u/ q' y4 ]0 r+ d% @Laboratory Evaluation
) S: V \$ b9 T5 O( S3 WThe bone age was consistent with 28 months by
; j- |4 h- A; O3 j' {- Musing the standard of Greulich and Pyle at a chrono-
! ]' X) O1 E+ Z2 Y, Xlogic age of 16 months (advanced).5 Chromosomal9 F; f" t5 K! U/ x
karyotype was 46XY. The thyroid function test( W% ^# ?, R, D# b7 a
showed a free T4 of 1.69 ng/dL, and thyroid stimu- d8 K$ _/ W c& b
lating hormone level was 1.3 µIU/mL (both normal).4 n0 b% f# j D5 L% S8 w8 z
The concentrations of serum electrolytes, blood
4 t) C8 z5 x9 durea nitrogen, creatinine, and calcium all were
9 O& @6 g: L' E K! g1 iwithin normal range for his age. The concentration! n% r0 O H8 m9 D
of serum 17-hydroxyprogesterone was 16 ng/dL) T9 O: R* e1 N9 E, h2 L$ U# m
(normal, 3 to 90 ng/dL), androstenedione was 20
2 n: A+ z8 o" W. N- h+ ~5 T. Rng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
E: S. k% p; X- ~3 h. F+ uterone was 38 ng/dL (normal, 50 to 760 ng/dL),
2 @7 h& M6 p G* t) o, t4 |desoxycorticosterone was 4.3 ng/dL (normal, 7 to/ M; V) y2 b) W" r- M& G
49ng/dL), 11-desoxycortisol (specific compound S)+ D, y E2 Q& j3 i- ~* s
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
* U' A2 f" m& I& Gtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total' G! q6 D9 W6 [
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
5 m7 h: E6 c6 J# |and β-human chorionic gonadotropin was less than
* V2 t Q7 S' p5 mIU/mL (normal <5 mIU/mL). Serum follicular" b: ?) N5 F$ x6 o$ q
stimulating hormone and leuteinizing hormone( {0 ?( P, a5 f" |& r/ m: i, x* l
concentrations were less than 0.05 mIU/mL
1 |6 j8 P$ J: n1 `- ~6 P' I# \( U6 D* L(prepubertal).3 F' A! t |- O# ?
The parents were notified about the laboratory }/ G) \: t0 \& Q
results and were informed that all of the tests were
+ |! L# z6 C1 ^; c' P, D6 m& `( F! dnormal except the testosterone level was high. The% Z3 E6 p% {# k. ^9 l' M% _
follow-up visit was arranged within a few weeks to- J) E/ g; g; O" u
obtain testicular and abdominal sonograms; how-
! z. W4 D7 o/ C0 v. W0 jever, the family did not return for 4 months.
7 Z" ~2 J/ U& s( J- n: vPhysical examination at this time revealed that the
7 `- }7 p/ \. U. D3 A" j8 G; |child had grown 2.5 cm in 4 months and had gained9 h( a# A5 S% ~2 o7 }) i
2 kg of weight. Physical examination remained2 ~' U1 g! ?/ }, x
unchanged. Surprisingly, the pubic hair almost com-# o; A; c9 j" y& Z( {& H$ S
pletely disappeared except for a few vellous hairs at
" C$ o; {$ Q- S+ l5 ythe base of the phallus. Testicular volume was still 2$ a |3 a# ]* n
mL, and the size of the penis remained unchanged.
3 I! Z. C+ |. ~" y1 OThe mother also said that the boy was no longer hav-
; n3 z# h0 t6 ~& z/ _8 Wing frequent erections.7 ^8 u# }/ G6 [- c) A M' B
Both parents were again questioned about use of
% @! e6 m; ]7 r0 kany ointment/creams that they may have applied to! [/ C9 W# _" D) }
the child’s skin. This time the father admitted the X; g. k \) v6 b) [& l D1 \
Topical Testosterone Exposure / Bhowmick et al 541: w- P) K7 o' g' B, J
use of testosterone gel twice daily that he was apply-
& R* ~, ?+ e$ V' ^* ~ing over his own shoulders, chest, and back area for: ]5 X' s% K: I. G
a year. The father also revealed he was embarrassed
; ~) E- P8 h/ t2 i0 M9 rto disclose that he was using a testosterone gel pre-
. U! g2 d+ y' \& I' Mscribed by his family physician for decreased libido
* Z$ B& B3 {4 v# wsecondary to depression.
& _. @" L% z+ @% q% q9 L) `The child slept in the same bed with parents.
3 \% [ o7 v. z8 n7 QThe father would hug the baby and hold him on his+ W+ X: X7 o$ V/ g
chest for a considerable period of time, causing sig-6 `: T5 I$ N- D. L2 K
nificant bare skin contact between baby and father.5 m4 V: s2 F( N4 v: K) X
The father also admitted that after the phone call,. h9 w- d0 m2 C7 ~; ^0 x5 m
when he learned the testosterone level in the baby8 g2 G: H" u4 z4 W) L
was high, he then read the product information* j1 H, ]7 X* P) ^
packet and concluded that it was most likely the rea-) {& b) L+ s5 l) D6 z
son for the child’s virilization. At that time, they
$ b n; o! s- `: \8 f" O2 Cdecided to put the baby in a separate bed, and the
# ?- b+ x5 K$ y6 jfather was not hugging him with bare skin and had
9 u4 w- w6 O& t! Lbeen using protective clothing. A repeat testosterone
/ I2 e+ e! `4 X8 t8 c- otest was ordered, but the family did not go to the* Z- F: G0 _$ |* h5 B5 }* ?
laboratory to obtain the test.* ?0 n0 h# l ` _; M
Discussion
4 r" C' ^' a1 V7 tPrecocious puberty in boys is defined as secondary" g. ?) x( p$ `' D P" _. G; o
sexual development before 9 years of age.1,4
* l- h! [ d# M* ^, yPrecocious puberty is termed as central (true) when
& I ], F7 s$ c: `+ r8 b# J6 qit is caused by the premature activation of hypo-; G& d4 ^! [3 |8 O
thalamic pituitary gonadal axis. CPP is more com-; a0 ]! [. m S; w
mon in girls than in boys.1,3 Most boys with CPP
. F7 B+ K& y( r: r# Kmay have a central nervous system lesion that is
+ b, j8 u$ V( \# _7 m4 Qresponsible for the early activation of the hypothal-
8 a' R" Q6 G: G( }/ }6 I( Qamic pituitary gonadal axis.1-3 Thus, greater empha-$ H6 }/ X. e4 t
sis has been given to neuroradiologic imaging in
9 g A' X8 i1 lboys with precocious puberty. In addition to viril-
/ @# h) E4 _2 e4 _3 uization, the clinical hallmark of CPP is the symmet-
9 g. i7 h+ n. {/ A( F& Q& `rical testicular growth secondary to stimulation by
X4 n8 n% V [) l, [$ N4 F& Qgonadotropins.1,35 E) h" E) f4 G7 X$ M& \( L
Gonadotropin-independent peripheral preco-5 T1 z, |: e8 g3 l
cious puberty in boys also results from inappropriate
# m \3 E; q% C& c4 W0 fandrogenic stimulation from either endogenous or
1 k; d' {- |% k" z, |exogenous sources, nonpituitary gonadotropin stim-+ F" g8 W5 y4 S9 W+ i* B4 {; `' B3 |
ulation, and rare activating mutations.3 Virilizing
7 e! B& j+ n( B: |9 ^2 H5 [0 Econgenital adrenal hyperplasia producing excessive) `/ ?5 l4 W6 A! J
adrenal androgens is a common cause of precocious( N+ ]1 P; m$ F3 |
puberty in boys.3,4% ]) p* D: \& m3 c3 V; ?
The most common form of congenital adrenal
: m' }: Q& f6 b& z6 i4 whyperplasia is the 21-hydroxylase enzyme deficiency.
w8 q W; J0 [% ~* ZThe 11-β hydroxylase deficiency may also result in
5 I) t) L3 W! ?' L% X! N6 ?0 p8 dexcessive adrenal androgen production, and rarely,4 Z a8 a% l- f s5 m8 X6 `7 H
an adrenal tumor may also cause adrenal androgen
) O0 X, e; V; f% S3 x8 nexcess.1,3# B; W5 g U# h, l& P
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 t8 O8 S# D7 t U542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
* I6 U4 P2 \! \2 `$ F9 ZA unique entity of male-limited gonadotropin-
% Z6 R9 b: h4 L1 H4 t/ w; q5 lindependent precocious puberty, which is also known$ t3 M( R! L( k( B6 N
as testotoxicosis, may cause precocious puberty at a6 x& C1 z4 p5 R9 f6 Y
very young age. The physical findings in these boys4 y4 R) }( ?. D% Z9 O- m! v: w
with this disorder are full pubertal development,
# U% ]2 H! z1 \+ l2 N+ r$ ]including bilateral testicular growth, similar to boys% S; m, Y& N- t
with CPP. The gonadotropin levels in this disorder
$ e* |+ U A: Oare suppressed to prepubertal levels and do not show
# D0 ]8 N: D2 n: z1 f- [: ]; spubertal response of gonadotropin after gonadotropin-% U' b" Y" }$ s8 m! n' [4 H3 c
releasing hormone stimulation. This is a sex-linked
- R, d, P- F) R! ]autosomal dominant disorder that affects only
8 ~, I7 {( G. X% c& K& [( }males; therefore, other male members of the family1 J7 k: @0 }% l7 ~. e' f7 J
may have similar precocious puberty.3
% P& X0 L+ h E4 x- l/ aIn our patient, physical examination was incon-
* Z# f# P* P9 J0 D7 Z/ jsistent with true precocious puberty since his testi-
' v, x: ?9 S" L* m, {cles were prepubertal in size. However, testotoxicosis
. K* d0 [) Z- F8 ^was in the differential diagnosis because his father
" s+ l8 m5 ?. \' O- Kstarted puberty somewhat early, and occasionally,
/ d* R4 T$ ^; q; ~ s& Q7 K i0 U2 Ytesticular enlargement is not that evident in the
" N8 s" u3 a: e% P$ @0 L( \1 f3 dbeginning of this process.1 In the absence of a neg-# U& x4 ^& P2 `+ z3 s Y2 p E! m
ative initial history of androgen exposure, our
4 _" t3 V0 y# t5 i) I7 gbiggest concern was virilizing adrenal hyperplasia,5 D5 n5 V% D% G5 A# E
either 21-hydroxylase deficiency or 11-β hydroxylase: ^$ ?4 T- `. R, h3 Z* k4 k
deficiency. Those diagnoses were excluded by find-
- w9 d- G" U5 j" R: @. d; W' j, |ing the normal level of adrenal steroids.
1 r Z# q1 F) {& QThe diagnosis of exogenous androgens was strongly
9 I3 z5 O. X+ d0 A. ]" fsuspected in a follow-up visit after 4 months because1 L) T% X$ I! L( J/ z
the physical examination revealed the complete disap-
% Z" k+ `: P. s, b$ Q3 p- i! {pearance of pubic hair, normal growth velocity, and( k! a5 y) n) v5 E
decreased erections. The father admitted using a testos-+ Y) F) d. W- |0 m0 E) O! Q
terone gel, which he concealed at first visit. He was
! x S# s h4 o7 ]& t8 w6 eusing it rather frequently, twice a day. The Physicians’8 r' i: N9 `# |' O; o7 ?/ {
Desk Reference, or package insert of this product, gel or) K0 V8 }8 j5 Q% ]6 @1 l
cream, cautions about dermal testosterone transfer to. I1 e$ q5 b- u' u U1 z% m+ U H
unprotected females through direct skin exposure.
" `( v, I9 T$ |( PSerum testosterone level was found to be 2 times the
2 H l' o5 \3 B# ?' obaseline value in those females who were exposed to
3 n. [9 u; `4 A, [5 y0 z. Q' O6 |# feven 15 minutes of direct skin contact with their male
. l' o0 S( V+ x' Bpartners.6 However, when a shirt covered the applica-
# \' k, N7 {6 u6 _9 f( Ytion site, this testosterone transfer was prevented.) K7 c6 K. N) \, K2 ~
Our patient’s testosterone level was 60 ng/mL,' [$ g% G$ `, A. r2 Z. q. r/ ?6 u
which was clearly high. Some studies suggest that2 O9 N9 |3 `8 Q0 i
dermal conversion of testosterone to dihydrotestos-
0 ^; N: O3 p9 w5 Z/ B% Iterone, which is a more potent metabolite, is more
: `2 v7 p( z H- ?0 Uactive in young children exposed to testosterone2 [: l* q) ^" r6 N
exogenously7; however, we did not measure a dihy-
3 J% N6 V, T6 p* l/ K' x9 cdrotestosterone level in our patient. In addition to
- L) y" S$ x& Hvirilization, exposure to exogenous testosterone in7 F2 [( ]0 X- ~0 H# [
children results in an increase in growth velocity and
; p# x, Z) ?5 [& A" W* v/ k; @advanced bone age, as seen in our patient.6 N- W7 N- S+ `/ U( T3 ^
The long-term effect of androgen exposure during9 r" A4 Z( D& i8 I4 w3 E; G
early childhood on pubertal development and final: h& k, K2 F$ _; t5 ~
adult height are not fully known and always remain: e6 i+ E" u3 A: S6 l1 H
a concern. Children treated with short-term testos-+ B% Z# M" F+ \* H- J P% a
terone injection or topical androgen may exhibit some
) k0 X* B6 x2 k8 jacceleration of the skeletal maturation; however, after
6 P$ V! K5 [& a0 `cessation of treatment, the rate of bone maturation) C* d( M3 U' ?+ @7 }: \; t
decelerates and gradually returns to normal.8,9
3 N2 e4 I: V& w- \There are conflicting reports and controversy: d) K: r. V) c/ w
over the effect of early androgen exposure on adult
, |; x: p) O+ e t" d' cpenile length.10,11 Some reports suggest subnormal( |* y5 {! K; C
adult penile length, apparently because of downreg-
5 Z @: L; d2 ]! U8 @4 Bulation of androgen receptor number.10,12 However,1 g" F, \% l, T( n9 y# Y: x
Sutherland et al13 did not find a correlation between B% D) v; v3 U5 c0 l1 Y4 e7 V+ Y
childhood testosterone exposure and reduced adult
9 ^& p# H8 _8 Z. f4 _penile length in clinical studies.1 r4 X# h1 s; l1 o2 s( e4 q0 Q( w
Nonetheless, we do not believe our patient is& ]6 a u# R( C4 O
going to experience any of the untoward effects from
. u6 ]$ C( z: q5 `, k; Xtestosterone exposure as mentioned earlier because5 c/ R) P: Q% }) W8 Y$ B
the exposure was not for a prolonged period of time.
4 x4 y' y4 l+ N6 JAlthough the bone age was advanced at the time of( S0 `8 o7 a! Z* _3 P
diagnosis, the child had a normal growth velocity at
$ X/ n( ]* o# D6 e+ @the follow-up visit. It is hoped that his final adult
% X3 S5 k4 W" _, G) z, S- eheight will not be affected.' e) d! t/ E( Q$ _3 l! a# s% {6 |8 S
Although rarely reported, the widespread avail-* Q( r S, n1 A, w# P! z
ability of androgen products in our society may
$ K- g5 \/ D$ r! A- r3 A% R: K) tindeed cause more virilization in male or female! Q8 C! h5 Q( {8 N
children than one would realize. Exposure to andro-
+ Q- T8 D2 h4 c: Y% F7 wgen products must be considered and specific ques-
6 k! s6 S$ Z3 B3 M h# f5 Rtioning about the use of a testosterone product or
" Z. Q& \% s/ ?. ?& ?' ^$ rgel should be asked of the family members during
) a8 \, a; \+ f: Qthe evaluation of any children who present with vir-
8 P6 M2 Q+ c# |9 S% Kilization or peripheral precocious puberty. The diag-
! k5 S) M9 {9 y% V) Y" G8 rnosis can be established by just a few tests and by
. V# A5 W/ T- _/ b9 b! Kappropriate history. The inability to obtain such a
. A# _% J9 y/ K$ k$ K" @history, or failure to ask the specific questions, may# j# c3 c* k% ~
result in extensive, unnecessary, and expensive
7 u `& E) E8 |& Cinvestigation. The primary care physician should be
* y2 l7 w2 j- X& g4 }: K7 Laware of this fact, because most of these children
* ~( }6 T/ h7 j9 r1 w5 }! s4 fmay initially present in their practice. The Physicians’% g) ` L3 ^5 v7 r$ D, e6 Y
Desk Reference and package insert should also put a
5 g* y G$ @- k. ]0 f* cwarning about the virilizing effect on a male or
, J/ v& C0 k& A9 Q: V3 W0 ^( Vfemale child who might come in contact with some-$ x! w; z3 P; M/ `5 G; E
one using any of these products.
9 ?( N+ I- s( F5 B" [% yReferences
7 t0 T7 e9 _: b# Z4 ^5 p1. Styne DM. The testes: disorder of sexual differentiation
( r) d1 H. `2 S& _* r* j" hand puberty in the male. In: Sperling MA, ed. Pediatric3 y5 Q9 y( u* H, V9 @3 p, I* x. F0 f
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;* q' h$ b8 y. M: z* b
2002: 565-628. V- F) K3 U! o( K5 j& ]0 D4 k
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious) L N6 C0 H6 A2 y
puberty in children with tumours of the suprasellar pineal+ }% d6 Q" T. V* \6 i6 t' {
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Topical Testosterone Exposure / Bhowmick et al 5438 b5 Q2 x3 Z) L
areas: organic central precocious puberty. Acta Paediatr.1 o; _. T4 O- Y s
2001;90:751-756.7 [* [& H0 }- X# \2 N
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
3 t3 s$ C4 C+ y3 b" ~Pediatric Endocrinology. 4th ed. New York, NY: Marcel
$ n, e6 B+ @6 m3 g. G, fDekker Inc; 2003:211-238.; Q9 S- J) k, H S; d* s% j
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual7 a/ E. v# m1 g$ S
development in a two-year-old boy induced by topical5 @' Z9 p: w3 w5 b* h9 s; r/ ^
exposure to testosterone. Pediatrics. 1999;104:e23./ Z, N: `5 n3 Q0 L+ I; x n
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of5 C G6 X8 J& d* ?3 ?- g) x# t8 M
Skeletal Development of the Hand and Wrist. 2nd ed.7 @+ P6 x( O$ |6 P
Stanford, CA: Stanford University Press; 1959.5 `6 ~0 y8 O( A+ r
6. Physicians’ Desk Reference. Androgel 1% testosterone,
" ~0 T5 {: x: i0 z0 _! c$ SUnimed Pharmaceutical Inc. Montvale, NJ: Medical
2 j" r2 B; [: K" K2 ^Economics Company, Inc; 2004:3239-3241.
& V1 O3 T/ g% ^+ d }7. Klugo RC, Cerny JC. Response of micropenis to topical
$ U1 q' h+ R9 _0 `% B+ wtestosterone and gonadotropin. J Urol. 1978;119:
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