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is a significant concern for physicians. Central
6 B( s4 B& Z5 C/ e+ g$ tprecocious puberty (CPP), which is mediated
' f1 j* M" x8 |. w% [through the hypothalamic pituitary gonadal axis, has) J( D# R9 t3 y4 C
a higher incidence of organic central nervous system
: q; f6 Z; x; G" T, @lesions in boys.1,2 Virilization in boys, as manifested
% k- d9 n4 `7 r1 Wby enlargement of the penis, development of pubic
' O' r8 `: R8 R7 V2 P5 N! ~) ahair, and facial acne without enlargement of testi-
; q; r! O ?, x0 T5 o7 |/ pcles, suggests peripheral or pseudopuberty.1-3 We, G' F/ K5 t# [$ H+ }1 `; u2 I
report a 16-month-old boy who presented with the
6 W7 n* e+ O3 Z- i$ denlargement of the phallus and pubic hair develop- k' { f0 Q. f5 K1 F' r
ment without testicular enlargement, which was due
/ f# {) }9 z) x) ?2 E& a5 h2 X' F8 J7 o3 ito the unintentional exposure to androgen gel used by
$ l2 M8 Q% E) K1 P/ _6 e8 W% `& ythe father. The family initially concealed this infor-
4 k/ o5 u7 S3 Lmation, resulting in an extensive work-up for this
6 o* [! y' M) C/ Lchild. Given the widespread and easy availability of/ I# v: m* Q+ v- ?3 z
testosterone gel and cream, we believe this is proba-
+ P6 o. Z/ Y+ ?* Hbly more common than the rare case report in the, e) y) z1 e4 C
literature.46 @/ t/ X0 G' N- l, {" n. b) ?
Patient Report# T$ O9 D: h0 J2 t! Q, v
A 16-month-old white child was referred to the
' n, e, ~. w- Z8 F3 W6 m, Vendocrine clinic by his pediatrician with the concern
/ F: { W! Z3 h1 Pof early sexual development. His mother noticed
& M' S/ |& ?/ zlight colored pubic hair development when he was' }1 {* O% h1 w8 V( n1 C
From the 1Division of Pediatric Endocrinology, 2University of4 v8 ], G" j; L0 g' h O3 m
South Alabama Medical Center, Mobile, Alabama.
3 R8 f! g4 c6 \. f, ^' mAddress correspondence to: Samar K. Bhowmick, MD, FACE,
% I6 z& b7 m _3 F- yProfessor of Pediatrics, University of South Alabama, College of9 m. G6 Z; F R& z
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;4 Q: n! I# }7 O
e-mail: [email protected].
1 a3 E. K0 y( r# k$ nabout 6 to 7 months old, which progressively became
3 x# {2 z: S% c$ S* ddarker. She was also concerned about the enlarge-
$ H: R. d: g/ ?8 I( _7 Ament of his penis and frequent erections. The child
3 M- r7 k; c4 ^& F# T( h. Kwas the product of a full-term normal delivery, with
4 K3 y5 B) X5 r y% z2 ta birth weight of 7 lb 14 oz, and birth length of
# @& F$ u- L9 U8 T20 inches. He was breast-fed throughout the first year
% m [8 T; w4 P& Q1 xof life and was still receiving breast milk along with
! J5 g6 V/ z3 y' msolid food. He had no hospitalizations or surgery,5 h6 l9 N" R2 Q- O0 R
and his psychosocial and psychomotor development
2 e" h- Q+ E( q& D. |" ^was age appropriate.
6 X9 m: B0 ]1 {% j: b/ MThe family history was remarkable for the father,
% Q. ]" W% W- [0 ?. k; O6 V3 gwho was diagnosed with hypothyroidism at age 16,5 f( o, [# L7 I7 o
which was treated with thyroxine. The father’s
. v% n/ `8 {+ I( |height was 6 feet, and he went through a somewhat$ n; y$ M/ V# I
early puberty and had stopped growing by age 14.0 G/ M! s4 O/ G8 P: t! r
The father denied taking any other medication. The
- h0 V+ Z! a5 Ochild’s mother was in good health. Her menarche, ^0 U5 _- j& U) a! k% d( Q* j
was at 11 years of age, and her height was at 5 feet( r9 O# U" E, q0 c8 n0 b) f
5 inches. There was no other family history of pre-0 T7 u o; I4 E L2 q6 `" D
cocious sexual development in the first-degree rela-
; K+ H9 R5 D) ntives. There were no siblings.
6 Q. W8 A% v5 c0 _5 bPhysical Examination
( l7 ^& M0 c6 p: z% fThe physical examination revealed a very active,
# D: R3 y0 C% z' [playful, and healthy boy. The vital signs documented
$ Q* t' w6 H( U: ~! R5 r: g& F) m' ga blood pressure of 85/50 mm Hg, his length was
' t! _2 c8 F M2 I" X( [2 p90 cm (>97th percentile), and his weight was 14.4 kg Q# `: m4 {8 S% J0 I# g
(also >97th percentile). The observed yearly growth7 T; R2 P& {* q1 P* ?
velocity was 30 cm (12 inches). The examination of- ~1 g2 y! f# ~/ Y, j
the neck revealed no thyroid enlargement.. R! z5 B3 o( v# p2 e
The genitourinary examination was remarkable for8 u. O: P7 ]8 r8 f: P
enlargement of the penis, with a stretched length of
" I; e$ u' _3 ~# a8 cm and a width of 2 cm. The glans penis was very well7 Q4 {1 e9 f. C% e
developed. The pubic hair was Tanner II, mostly around
2 Y( A! Q) S) G" A) f1 w540
, ]5 I! ~" L: p! E2 A. Zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( q' a6 ^7 x& W. }- Q
the base of the phallus and was dark and curled. The" ?5 d$ d: `. [) _+ Q7 F+ Y
testicular volume was prepubertal at 2 mL each.
: L, P c, ?9 _ O; {4 z* iThe skin was moist and smooth and somewhat4 Z$ `0 v9 d6 m% |
oily. No axillary hair was noted. There were no5 ?7 s1 ]' ]0 t* i- I
abnormal skin pigmentations or café-au-lait spots.
6 c# G$ t2 ^3 M/ ONeurologic evaluation showed deep tendon reflex 2+
& V( {1 V% C% [, R5 Ibilateral and symmetrical. There was no suggestion+ e" B9 z9 L. m& ^0 f) ]( s$ @
of papilledema.
# n% X7 E( |" c( n& W+ H8 o2 ?1 BLaboratory Evaluation
5 T. d+ o6 B' \The bone age was consistent with 28 months by
8 ?% ]: s6 n+ I0 q; nusing the standard of Greulich and Pyle at a chrono-+ b) p* Z& J- L
logic age of 16 months (advanced).5 Chromosomal0 I# S2 K. Q& n4 U
karyotype was 46XY. The thyroid function test) a6 R: s6 z) a% @' ?) q5 n, Z
showed a free T4 of 1.69 ng/dL, and thyroid stimu-( v$ ? S4 M# s
lating hormone level was 1.3 µIU/mL (both normal).- G6 d0 q) O0 X) E9 D
The concentrations of serum electrolytes, blood
/ |; W8 o" ~# {urea nitrogen, creatinine, and calcium all were
" Y# e- v1 X8 l' P+ Pwithin normal range for his age. The concentration' p. r) k0 v. C+ t5 I1 m% H
of serum 17-hydroxyprogesterone was 16 ng/dL. |$ J% |+ R% i% H9 g# J
(normal, 3 to 90 ng/dL), androstenedione was 20
3 R0 W4 \. j1 A4 dng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-; Z! J; z( {( v- d: Y! x
terone was 38 ng/dL (normal, 50 to 760 ng/dL)," g7 E8 S* x" A* F: w2 n
desoxycorticosterone was 4.3 ng/dL (normal, 7 to9 l V" i( e3 f- M3 e2 C: V
49ng/dL), 11-desoxycortisol (specific compound S)
$ {# {0 r8 w" A! w- c+ dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
3 V& m, B7 _2 Q: ^tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
6 B4 [, _: i; P; {testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
9 A4 H4 `* v% Y2 e; N' tand β-human chorionic gonadotropin was less than
0 w2 h) C5 ~( v5 mIU/mL (normal <5 mIU/mL). Serum follicular
5 M3 h' X% i* H- kstimulating hormone and leuteinizing hormone+ Y4 a6 y2 N0 h+ y/ R
concentrations were less than 0.05 mIU/mL7 ], C- c8 A5 ~ r. P9 F: s
(prepubertal).
" }9 i5 Z) Q0 C5 C, ZThe parents were notified about the laboratory* z: `7 R* E3 j+ _3 s& t5 ?
results and were informed that all of the tests were H _: P: \% k( ?' r# c( x
normal except the testosterone level was high. The
+ M1 c' |* g2 B' e* C" @; vfollow-up visit was arranged within a few weeks to+ s' H% g" j6 k0 t
obtain testicular and abdominal sonograms; how-
# C& M0 [# y* m2 a& @: }! |ever, the family did not return for 4 months.
; s1 V9 c( E9 h2 ]' v( MPhysical examination at this time revealed that the
- W6 m$ f2 ^6 ]% c+ l3 M1 achild had grown 2.5 cm in 4 months and had gained" G# z: Q' a/ F
2 kg of weight. Physical examination remained# ~$ c5 S2 Q1 h" P5 @2 Y* }. }. `! y
unchanged. Surprisingly, the pubic hair almost com-
3 M+ } o ]% ~8 M9 Npletely disappeared except for a few vellous hairs at! ~( a5 R5 v; [& L5 V7 `3 W; l
the base of the phallus. Testicular volume was still 2
/ V! M7 r7 `7 d# X: _mL, and the size of the penis remained unchanged.
6 K2 C; {! \( J* z$ A5 M8 UThe mother also said that the boy was no longer hav-
. Q- O( |0 [/ E& i1 G/ Uing frequent erections.
0 ?7 a$ x" _% ZBoth parents were again questioned about use of
+ g0 C, h7 Z% K# G& E" h) vany ointment/creams that they may have applied to: w# j: m. [$ F; \
the child’s skin. This time the father admitted the8 d% g* w. d3 r5 M9 W
Topical Testosterone Exposure / Bhowmick et al 541& g3 Z/ g# r+ T0 q* D4 d8 k0 L
use of testosterone gel twice daily that he was apply-0 o- T9 ]1 E7 {7 N5 L
ing over his own shoulders, chest, and back area for. n# q% T4 \# A. y
a year. The father also revealed he was embarrassed) }! x; `6 w3 }; V! ?9 u* t: v
to disclose that he was using a testosterone gel pre-- _( m& ~& B$ n6 X `! @3 w9 k
scribed by his family physician for decreased libido/ X" F2 H4 f3 v
secondary to depression.2 m$ x$ o, q* t
The child slept in the same bed with parents." `2 _' X2 i1 n, M7 o; d
The father would hug the baby and hold him on his c7 ^4 Y5 X) g }6 ^+ W
chest for a considerable period of time, causing sig-
( m; G$ m0 a) n; ?nificant bare skin contact between baby and father.
1 |0 c# k% v6 N/ eThe father also admitted that after the phone call,
4 F6 w4 W+ M/ R) wwhen he learned the testosterone level in the baby
; X# x* m6 d; l$ u6 ~was high, he then read the product information
5 q4 X: D$ Y$ Z% [ y& Y- Ypacket and concluded that it was most likely the rea-
, q& ?6 o4 I: o( V: F5 t2 Zson for the child’s virilization. At that time, they
1 U$ @& v% [! `$ t8 \) edecided to put the baby in a separate bed, and the6 o7 b" @- o% c
father was not hugging him with bare skin and had6 F$ |* {% F4 G- v+ V z1 ~
been using protective clothing. A repeat testosterone
# `" z' U* F g; z3 itest was ordered, but the family did not go to the
2 l8 o7 ^3 u) _ G* {laboratory to obtain the test.* K5 Q# O8 N1 s& m& _5 }
Discussion2 A# w. k. ^ E- w) C- g$ _$ H
Precocious puberty in boys is defined as secondary
3 w+ c/ o& }0 Q6 c% f4 Csexual development before 9 years of age.1,4
3 U$ w0 J; O7 ]3 r" m+ o/ f1 nPrecocious puberty is termed as central (true) when* ^, |6 ~5 g4 E* Z2 `# Q3 w) K
it is caused by the premature activation of hypo-
' K5 B) L4 {5 f- E" ~5 Cthalamic pituitary gonadal axis. CPP is more com-
. f" p7 I- p& ?. Lmon in girls than in boys.1,3 Most boys with CPP$ n% w( T9 F1 c6 T( Q
may have a central nervous system lesion that is* [( T' W6 t6 i6 }0 O& W$ h
responsible for the early activation of the hypothal-" }. Q. r( }* M* C! t( z
amic pituitary gonadal axis.1-3 Thus, greater empha-6 V! z; T4 r, t+ Z8 U0 ]
sis has been given to neuroradiologic imaging in
* v9 z: [* ?5 K4 J3 r5 y$ kboys with precocious puberty. In addition to viril-
0 \- f$ f" D% a' Dization, the clinical hallmark of CPP is the symmet-
% ^7 o( B- s( v8 Xrical testicular growth secondary to stimulation by4 x) S6 s2 D* Z7 K7 a7 W
gonadotropins.1,3
- G4 v: Y& ~5 A3 ^0 R+ yGonadotropin-independent peripheral preco-
* ^! G' \$ n6 Q2 G/ x( j q; }cious puberty in boys also results from inappropriate
4 c O! S. _8 uandrogenic stimulation from either endogenous or
+ `1 T# u! s8 Wexogenous sources, nonpituitary gonadotropin stim-5 h/ }2 w! l0 R% P, o/ T
ulation, and rare activating mutations.3 Virilizing
& D) S' m/ w* v' Tcongenital adrenal hyperplasia producing excessive
3 I. i' ~) l9 M+ H3 d) b; t5 Zadrenal androgens is a common cause of precocious
2 H3 u. Y8 [6 R6 l C+ }$ Mpuberty in boys.3,47 c) z4 J( J+ r4 R
The most common form of congenital adrenal6 U( `! m E( }* N1 O
hyperplasia is the 21-hydroxylase enzyme deficiency.
1 k ~' n1 D' S4 v9 k. q; UThe 11-β hydroxylase deficiency may also result in
' Z& _3 V5 E) X/ hexcessive adrenal androgen production, and rarely,
1 @* U G, Q3 u3 x( Z. s. G6 uan adrenal tumor may also cause adrenal androgen1 U' |! M D) d& _
excess.1,3
$ J9 }/ F9 U" U7 q8 B% Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from& u" y) t3 q: L8 v. h7 u
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007# h3 p6 L2 g( ~' t( ]5 d
A unique entity of male-limited gonadotropin-
. C4 Y' C* B; E( ]independent precocious puberty, which is also known# r4 e Q+ \/ J1 O' x& L0 o
as testotoxicosis, may cause precocious puberty at a& K& x! b8 g. n- }3 T, d8 n9 q% j. s0 A
very young age. The physical findings in these boys
8 z1 C/ c! Z! O) V" _with this disorder are full pubertal development,6 t2 A7 J9 Y8 x% u
including bilateral testicular growth, similar to boys
' Z( F3 ^; @' V3 p; K% S" lwith CPP. The gonadotropin levels in this disorder8 H$ S6 D3 W: t, {
are suppressed to prepubertal levels and do not show
& T3 h! f; i6 e T* J: s! b3 `pubertal response of gonadotropin after gonadotropin-
+ R% `6 I1 [1 Z8 f: s1 o6 Jreleasing hormone stimulation. This is a sex-linked" @" n+ Q1 c% b/ E# q9 k) \
autosomal dominant disorder that affects only
, g. Z7 ` T. g4 Bmales; therefore, other male members of the family
" P( B; z) _3 s# D0 d! Gmay have similar precocious puberty.3
( @7 ^ X9 _' g8 wIn our patient, physical examination was incon-* C' t/ @7 v. v1 J+ d, K! x
sistent with true precocious puberty since his testi-# h6 L6 g5 G" a
cles were prepubertal in size. However, testotoxicosis; }; y% N4 r3 X( I' q: _/ M
was in the differential diagnosis because his father
/ \1 \5 M0 d' n5 S7 jstarted puberty somewhat early, and occasionally,
) p, a/ O" x+ d# y# |. X5 \testicular enlargement is not that evident in the
+ p1 ~2 [2 r$ {5 N, G2 cbeginning of this process.1 In the absence of a neg-/ b9 T+ `/ D+ k6 S) s" k- Q
ative initial history of androgen exposure, our
( }: t; Z% U' }+ ` k6 |biggest concern was virilizing adrenal hyperplasia," f$ g( F/ J( [
either 21-hydroxylase deficiency or 11-β hydroxylase# E, x; C5 z8 B& H! y
deficiency. Those diagnoses were excluded by find-- K4 J: m7 s* L7 u) {; K8 |2 S
ing the normal level of adrenal steroids.6 {! N" t, V8 B
The diagnosis of exogenous androgens was strongly
- }# K. {9 H! `3 Ususpected in a follow-up visit after 4 months because
' \) ?0 ]$ M+ K1 N) X# Gthe physical examination revealed the complete disap-" k9 p8 C, }" o, I7 ]+ |4 p
pearance of pubic hair, normal growth velocity, and- l q' X5 Q3 k& \6 t9 u
decreased erections. The father admitted using a testos-
- y; J b. t2 b4 Vterone gel, which he concealed at first visit. He was
& ~0 o+ A6 g( u/ M! X$ K" eusing it rather frequently, twice a day. The Physicians’, y- y# K" W: A: `7 z2 l; L* U& T
Desk Reference, or package insert of this product, gel or
% U! \, j) v: l: I3 Jcream, cautions about dermal testosterone transfer to
) f0 H9 v k% R8 g- [: Y, ^unprotected females through direct skin exposure.- b0 e* [2 q8 `% X: u _6 g
Serum testosterone level was found to be 2 times the
: f- p1 ]2 ?. l/ ybaseline value in those females who were exposed to
" G6 ]0 a4 m& L! h0 B, Beven 15 minutes of direct skin contact with their male
" c/ j+ [! T" g, [! }partners.6 However, when a shirt covered the applica-
/ B0 j* ?9 p8 K' `$ I# dtion site, this testosterone transfer was prevented.
7 F% K6 q% U6 p# M2 EOur patient’s testosterone level was 60 ng/mL,
! |7 q. W- A7 N: f8 Q9 |which was clearly high. Some studies suggest that
! @/ u: G4 d' x$ ^+ B. O3 jdermal conversion of testosterone to dihydrotestos-6 I a4 C( a& B! E1 a
terone, which is a more potent metabolite, is more' V# P8 X2 j, z- z2 F0 c4 Z B
active in young children exposed to testosterone8 I8 W9 ] V: L% v+ e- L
exogenously7; however, we did not measure a dihy-
; O- P3 n5 [6 R5 i) Ldrotestosterone level in our patient. In addition to% ]2 g* K4 V2 E4 I( `0 r$ q
virilization, exposure to exogenous testosterone in
F$ V0 X. A' e2 }$ T# N4 cchildren results in an increase in growth velocity and
' k2 {0 A) J& Z* J; Iadvanced bone age, as seen in our patient.0 t1 s" l: @" }& n4 M8 \
The long-term effect of androgen exposure during+ `2 U! z5 y+ I
early childhood on pubertal development and final
& m. J# f) a2 U2 z0 A* Badult height are not fully known and always remain
" d& V3 c$ n6 h- m l. ka concern. Children treated with short-term testos-
' A) g! i$ _' l3 p7 r% @( ]# o; Y5 |terone injection or topical androgen may exhibit some( L- z$ J7 P6 b, n Z( g" X
acceleration of the skeletal maturation; however, after
) t2 x1 j; `; I! F, h1 W! s* d7 K9 xcessation of treatment, the rate of bone maturation" z7 A2 ]& R g1 g
decelerates and gradually returns to normal.8,96 G( j7 P1 \$ @9 {! r. x
There are conflicting reports and controversy
+ @/ Z( e' M1 R$ Y6 _over the effect of early androgen exposure on adult/ ~; I2 L# A2 @) `5 i1 b
penile length.10,11 Some reports suggest subnormal6 X5 \- K1 M1 V5 T; \) z
adult penile length, apparently because of downreg-- L Q) p7 M" F+ y9 N
ulation of androgen receptor number.10,12 However,
' d8 k! E" F+ n3 K0 QSutherland et al13 did not find a correlation between
. R: {9 t& |5 ]childhood testosterone exposure and reduced adult: `- d1 X+ U0 l
penile length in clinical studies., N" P$ t7 S; d8 v! R
Nonetheless, we do not believe our patient is( p/ H7 k9 z- F' \# o
going to experience any of the untoward effects from
! F( s) f9 k1 r+ ?% d7 [) i0 F2 Xtestosterone exposure as mentioned earlier because
- F. q8 O: ^9 L/ M6 `the exposure was not for a prolonged period of time." p$ ]5 p. U# m% Q6 \
Although the bone age was advanced at the time of; e( O# v, d. p* ^. b. K9 k4 K
diagnosis, the child had a normal growth velocity at9 d) @3 {8 @' p! v
the follow-up visit. It is hoped that his final adult& S) Z1 |/ M7 F! L0 q, y
height will not be affected.2 D3 U; \! o5 Q/ U4 E% [# @
Although rarely reported, the widespread avail-: m, _% d, v8 E2 p1 ?' k
ability of androgen products in our society may" R* O; o* |3 h, K4 m# a
indeed cause more virilization in male or female
% v2 M& j+ s, x" D9 jchildren than one would realize. Exposure to andro-
" q! G& C- c8 ]6 Mgen products must be considered and specific ques-
|' U* q# S7 V* ntioning about the use of a testosterone product or
# @/ a ?% R- [3 s7 U3 l- C9 Ogel should be asked of the family members during
2 r0 a) \& O. a9 Z: N2 J1 A4 F* Bthe evaluation of any children who present with vir-
! c# @6 M* X0 oilization or peripheral precocious puberty. The diag-% U, O) ^" m3 U
nosis can be established by just a few tests and by
* B. a( g3 i6 a' L8 {) Pappropriate history. The inability to obtain such a8 J; H3 K; n- b
history, or failure to ask the specific questions, may/ O9 h& T0 X9 {5 k; k& f. b4 v
result in extensive, unnecessary, and expensive/ V. B) Y+ }2 R* n# t2 G
investigation. The primary care physician should be
$ I* X5 H/ O' x$ E0 _aware of this fact, because most of these children
% R. _; c3 `4 f) }( J) Amay initially present in their practice. The Physicians’1 u+ ^) n' P6 j# ]
Desk Reference and package insert should also put a
0 U& H* ~/ m8 {6 S+ {9 j5 A" lwarning about the virilizing effect on a male or
9 z. i& X+ ]% c0 h7 U3 x6 Nfemale child who might come in contact with some-$ a! O1 ?" z9 C7 p
one using any of these products.
% _7 U. p2 s7 gReferences( ?! \, ^% m+ B' m# q! Z% B
1. Styne DM. The testes: disorder of sexual differentiation8 X, F* A4 l4 s$ J6 H) I6 ]" S
and puberty in the male. In: Sperling MA, ed. Pediatric& @" r/ }% Y$ c3 r$ b
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
, R+ X& o# E5 y+ C2 i$ L4 E2 q2002: 565-628.
! l- S8 ^3 @) O, u5 L2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
/ x/ h1 B4 i6 ?7 Tpuberty in children with tumours of the suprasellar pineal) ^9 G6 u% k. l. |- O0 k t- E6 T3 @
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from4 X+ r" U% x9 i! p m& y8 V
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6 \* O; B7 f1 E2 l# Pareas: organic central precocious puberty. Acta Paediatr." c2 Q/ R5 \$ s9 l% F4 ?
2001;90:751-756.; _; g% E- W" P' r* h% F* T+ j
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
5 j- T1 g6 V+ [& ~1 l7 G4 [Pediatric Endocrinology. 4th ed. New York, NY: Marcel
W, ^9 q* w) g- k( d$ y- Y& fDekker Inc; 2003:211-238.
/ j3 o5 w2 ?* K3 H P4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
$ M- ~- u/ q1 @0 C; Udevelopment in a two-year-old boy induced by topical
( d- p0 u* T+ [( eexposure to testosterone. Pediatrics. 1999;104:e23.
; z8 k8 ^+ X- g n5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
7 C, g- J; b+ b) ^+ MSkeletal Development of the Hand and Wrist. 2nd ed.
& o' \- A( z) Q m$ r( WStanford, CA: Stanford University Press; 1959.: ?3 t3 J6 g+ T5 O2 ]& I& i
6. Physicians’ Desk Reference. Androgel 1% testosterone,8 ~) X" Y9 H2 O3 ~% j8 C0 Q3 u
Unimed Pharmaceutical Inc. Montvale, NJ: Medical. j$ {" r# U4 H& ]: T; T. B8 X
Economics Company, Inc; 2004:3239-3241.. {1 D$ M% [: c+ U
7. Klugo RC, Cerny JC. Response of micropenis to topical
& b3 `) y" ]* u* V% _% rtestosterone and gonadotropin. J Urol. 1978;119:
6 S: q- ^5 J/ m/ N667-668.; [, x/ q' A( I$ d* Y. D/ N
8. Guthrie RD, Smith DW, Graham CB. Testosterone6 ?2 X$ q) Y8 {" e: n
treatment for micropenis during early childhood. J Pediatr.$ R: g/ ?# B8 c
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