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is a significant concern for physicians. Central/ _+ g8 }* E3 \' w; v2 I, P* j) r+ l
precocious puberty (CPP), which is mediated
8 m7 b& o# M5 g6 {, q8 Fthrough the hypothalamic pituitary gonadal axis, has
' L6 s* h6 }- Ra higher incidence of organic central nervous system
2 z" t M$ f1 p. ?! Q U" Blesions in boys.1,2 Virilization in boys, as manifested' q1 S w, g- }! P
by enlargement of the penis, development of pubic
7 O/ T0 b( c: s' Shair, and facial acne without enlargement of testi-
+ }( D( K: C+ S1 Ncles, suggests peripheral or pseudopuberty.1-3 We
1 U7 ]9 M( S+ Y1 Y9 F3 J' {/ K2 ~2 sreport a 16-month-old boy who presented with the
: N0 l A n z! M+ p5 Z+ qenlargement of the phallus and pubic hair develop-
3 r/ X3 r" @8 F9 p: Fment without testicular enlargement, which was due |+ h5 e+ E) D7 H! H
to the unintentional exposure to androgen gel used by8 I9 l( m( t2 z" `
the father. The family initially concealed this infor-( c4 E* \% C' b; e9 e
mation, resulting in an extensive work-up for this
, u8 ?: z2 x# u( [' `/ Q/ j) schild. Given the widespread and easy availability of* \- e1 N# W8 @9 n
testosterone gel and cream, we believe this is proba-
8 K: \& B% |: I# f1 x6 y, Hbly more common than the rare case report in the9 h- p# U9 E! }) x
literature.4
, g. B; u0 E9 \" u& i# F& _Patient Report% h/ y! V, ^ o, X3 k" K' [
A 16-month-old white child was referred to the
! v& i9 F6 d8 k( `$ X" _" Q! x) Jendocrine clinic by his pediatrician with the concern
5 E3 I, n+ A+ V: t8 T& c' g0 lof early sexual development. His mother noticed
j7 m* T6 N1 k7 W: Hlight colored pubic hair development when he was
( K, l/ D# q5 _4 rFrom the 1Division of Pediatric Endocrinology, 2University of* k, |( H/ P7 V( I" B9 A
South Alabama Medical Center, Mobile, Alabama.2 M/ A% {! @* l7 u* a$ {
Address correspondence to: Samar K. Bhowmick, MD, FACE,7 s( D0 x' R6 E# A
Professor of Pediatrics, University of South Alabama, College of
, e% s. V4 Q$ HMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 V1 s0 L2 k6 z8 ]1 M4 N0 V9 F* {9 ne-mail: [email protected].
8 n% Y1 W9 q9 i9 x H Eabout 6 to 7 months old, which progressively became4 t; p# ` B4 T! U
darker. She was also concerned about the enlarge-
! W B8 y) ?& @& O* Zment of his penis and frequent erections. The child
7 u: l- h( m" Z# q: ~( s6 _2 `was the product of a full-term normal delivery, with
" J: h! {% i- m {a birth weight of 7 lb 14 oz, and birth length of% H9 a8 x' Q+ M
20 inches. He was breast-fed throughout the first year" ]* W7 L: @8 S/ w! l- q. d+ i
of life and was still receiving breast milk along with/ d9 |( B1 s" L( K# {
solid food. He had no hospitalizations or surgery,
5 H" L$ d0 l7 i' S: y* fand his psychosocial and psychomotor development
" k3 N! d& R4 `4 `! e, owas age appropriate.: g( x# _' z! B: N- R
The family history was remarkable for the father,0 ?. g9 P h: }5 t& f$ R
who was diagnosed with hypothyroidism at age 16,$ y/ Z/ _2 |6 I4 |; R. l F. N
which was treated with thyroxine. The father’s* V6 f3 S5 u/ k D; T' ~
height was 6 feet, and he went through a somewhat
) j9 l. p) U2 B- n/ F" mearly puberty and had stopped growing by age 14.9 X5 o+ h; E) Q' G2 V
The father denied taking any other medication. The/ C0 R/ K0 z& \
child’s mother was in good health. Her menarche% Q( f# H# a& O9 L1 j6 P$ {
was at 11 years of age, and her height was at 5 feet' ]( w- t$ h2 f4 K6 A) G0 j
5 inches. There was no other family history of pre-
. @# F& d4 s5 X/ M+ kcocious sexual development in the first-degree rela-5 U. x ^6 {4 y" A1 {
tives. There were no siblings.
/ }; D$ i- p. o/ ~Physical Examination
+ J9 r6 k( d0 b& c& A9 h% gThe physical examination revealed a very active,9 B& v9 _! S+ y
playful, and healthy boy. The vital signs documented8 ]0 E5 B5 A3 G0 t9 D2 l4 `
a blood pressure of 85/50 mm Hg, his length was/ c$ x& ?3 R5 e
90 cm (>97th percentile), and his weight was 14.4 kg
, ^+ |6 N2 F" Z* L+ a" o1 C( f(also >97th percentile). The observed yearly growth
7 d1 |2 N' |& J7 l) fvelocity was 30 cm (12 inches). The examination of
: ]) }/ l( `3 p/ c0 h7 t' A jthe neck revealed no thyroid enlargement.4 W: N1 S/ H) B$ U# f- e' `8 p" ~0 U, H
The genitourinary examination was remarkable for
9 o* Q0 q3 }* o0 {& \! `8 m* Fenlargement of the penis, with a stretched length of
! r7 B1 B) G) r7 F9 x8 cm and a width of 2 cm. The glans penis was very well
, i n. f. u3 d" c( ddeveloped. The pubic hair was Tanner II, mostly around
# i" H+ H1 R. g+ n540. E8 K. C, @' @% P9 g8 ]0 g" p
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ C+ ?) T8 k9 k2 R: Tthe base of the phallus and was dark and curled. The4 D% I0 t" a5 o: S" v* z4 ~
testicular volume was prepubertal at 2 mL each.
( R5 b5 m/ [# s0 w: `. y" GThe skin was moist and smooth and somewhat4 \9 {& p% y( R% n" E& L
oily. No axillary hair was noted. There were no- b" P" ]2 X, t* d0 O0 O$ J
abnormal skin pigmentations or café-au-lait spots.5 N( B) H; V6 o' c* P$ @
Neurologic evaluation showed deep tendon reflex 2+
& J( ~9 |' \0 p2 E( e5 ^' s# `bilateral and symmetrical. There was no suggestion
6 y8 V9 ]# `" sof papilledema. [( o2 e i( X' H% \5 p; `/ E# Z
Laboratory Evaluation' O' L# a0 K2 H5 l& \6 K
The bone age was consistent with 28 months by
( L4 T8 l1 O- i. pusing the standard of Greulich and Pyle at a chrono-( z9 b0 o# Q$ h0 h% h
logic age of 16 months (advanced).5 Chromosomal
7 A G8 X# b2 i4 l4 i0 \7 k8 Rkaryotype was 46XY. The thyroid function test
4 m4 v" i& q% M! D3 @showed a free T4 of 1.69 ng/dL, and thyroid stimu-' @! C$ ]* n( M h# m6 V
lating hormone level was 1.3 µIU/mL (both normal).7 Z) W9 i& T9 R3 M) O7 B; i( k
The concentrations of serum electrolytes, blood
2 m1 q1 R- _$ U" T5 Uurea nitrogen, creatinine, and calcium all were
1 ~% J! P9 D; P/ cwithin normal range for his age. The concentration
8 H2 l' A0 U' g; P. hof serum 17-hydroxyprogesterone was 16 ng/dL
' y, e) F( l/ G6 f- I(normal, 3 to 90 ng/dL), androstenedione was 20
6 F r& d. T0 E8 r3 y% P4 Dng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-0 ]7 j0 Y! i# o7 L* ]( D" w
terone was 38 ng/dL (normal, 50 to 760 ng/dL),0 j! ^# {+ D+ G X# ^% b: b) { r1 Q) x
desoxycorticosterone was 4.3 ng/dL (normal, 7 to% { _' T7 N: x& i: r
49ng/dL), 11-desoxycortisol (specific compound S)
+ v; o: c) b T6 J% {7 _was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-2 W& C7 s. a$ ?* v( W, O
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total+ q& u, G4 \# M# i
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),! @$ ^+ I! _7 {$ B
and β-human chorionic gonadotropin was less than- w {: z! i' W1 k- [. v! e0 c
5 mIU/mL (normal <5 mIU/mL). Serum follicular% S' O; O7 V9 D2 {) V" L
stimulating hormone and leuteinizing hormone
5 ~9 u7 v: v; k2 }. m5 T# `concentrations were less than 0.05 mIU/mL
+ j% v# a6 ~; c# r4 j(prepubertal).( R3 H4 W# i' c5 x
The parents were notified about the laboratory
! l6 R( F8 }% S* z; Hresults and were informed that all of the tests were
! j0 u) ?, N& d' z5 ^# S8 Rnormal except the testosterone level was high. The
8 f' z' W7 k& _/ T: @ mfollow-up visit was arranged within a few weeks to
1 Z+ y# m3 ~& tobtain testicular and abdominal sonograms; how-
9 B2 Z0 {: x2 k$ \ever, the family did not return for 4 months.
0 ?/ \, C& C' Z+ C( X" M; kPhysical examination at this time revealed that the
4 g0 n/ ]; b. U7 ?child had grown 2.5 cm in 4 months and had gained; C# E9 k# _- o9 I
2 kg of weight. Physical examination remained3 s( ]( e( A+ M1 X- o. g
unchanged. Surprisingly, the pubic hair almost com-
; \9 ]/ Z" t/ i- Gpletely disappeared except for a few vellous hairs at
7 ?& C8 Q, ]" q& j* ethe base of the phallus. Testicular volume was still 2
: H/ k! q4 ?+ }% `/ c- T" H4 s! k7 amL, and the size of the penis remained unchanged.
0 Q3 u3 d+ c* { I! w& fThe mother also said that the boy was no longer hav-" H, z8 c; v% \: T$ y# {
ing frequent erections.- Q5 B, `8 F# Q0 D% _
Both parents were again questioned about use of
/ J# c% W! Q$ h( `- _8 \' i5 Vany ointment/creams that they may have applied to
" ?3 N; } v( Z7 ^* |the child’s skin. This time the father admitted the1 T4 }# O. \ y2 d* W( j! T
Topical Testosterone Exposure / Bhowmick et al 5415 f5 ?; h. c7 z! t/ i
use of testosterone gel twice daily that he was apply-
: @1 ~9 H% n; f: W: h7 iing over his own shoulders, chest, and back area for* v+ J3 ~& D. \
a year. The father also revealed he was embarrassed
$ B) S, o$ J+ @to disclose that he was using a testosterone gel pre-
9 r- M5 y6 p1 Y9 a: Rscribed by his family physician for decreased libido
* h$ I" V& Q. M, W: u8 A+ H2 y: V- T7 msecondary to depression.3 i5 P0 ]. c8 N. Z
The child slept in the same bed with parents.
: n) J& R; `3 _, k! K! f# rThe father would hug the baby and hold him on his
* q8 `5 {: r" K8 \chest for a considerable period of time, causing sig-
: u2 M- a5 ]$ m) k- N( N0 {5 ynificant bare skin contact between baby and father.
8 [; v3 c( X d; U: T! ~4 bThe father also admitted that after the phone call,$ _! F' J" h0 ]* ?- P
when he learned the testosterone level in the baby
& r2 q- Y7 w* s4 j% v' s0 C! Lwas high, he then read the product information3 t/ n k6 R) V
packet and concluded that it was most likely the rea-
6 s9 |7 T+ n' C3 f% yson for the child’s virilization. At that time, they( v* {( N: V0 }8 w
decided to put the baby in a separate bed, and the
' k' X/ _. k8 U. R2 ]! R0 ^father was not hugging him with bare skin and had
+ q" ~$ p: E9 i, c2 D4 `been using protective clothing. A repeat testosterone& j( Q9 s$ I9 @" P5 }
test was ordered, but the family did not go to the% k: ^" s$ C6 g& s0 h9 x
laboratory to obtain the test.
% w7 d$ {1 f: Q, vDiscussion# w- R( y9 c4 |% A& v
Precocious puberty in boys is defined as secondary
9 p4 j* W+ E6 [1 P! Isexual development before 9 years of age.1,4
) Z# R1 \% P, H) T5 u% U6 U' QPrecocious puberty is termed as central (true) when) g/ |7 {: X9 g" l3 _3 v0 i* z
it is caused by the premature activation of hypo-
$ t( i# t$ o s6 ], R2 R8 f% Cthalamic pituitary gonadal axis. CPP is more com-
4 y- e, {6 ^+ x# Fmon in girls than in boys.1,3 Most boys with CPP0 l, J" |& l; k) F6 m/ Z
may have a central nervous system lesion that is
% `! ^5 V! ^. q7 O- presponsible for the early activation of the hypothal-
& F& G7 H) }4 q9 o% s! I6 v8 Iamic pituitary gonadal axis.1-3 Thus, greater empha-6 ` r, K4 K# T( q. c
sis has been given to neuroradiologic imaging in$ K% f: |( y- |+ H8 q
boys with precocious puberty. In addition to viril-$ E- F& v" B) ]+ }/ V" O
ization, the clinical hallmark of CPP is the symmet-: o& `! U$ U0 [# r
rical testicular growth secondary to stimulation by
: M4 k) P2 o+ rgonadotropins.1,3
/ B, V3 }/ L" L5 J. J' KGonadotropin-independent peripheral preco-5 @1 S& U- K, o% t7 ?9 X
cious puberty in boys also results from inappropriate) F+ z$ F6 @/ f' ^) E y8 Y. w
androgenic stimulation from either endogenous or
+ V0 y; i1 p# U! M1 j5 Lexogenous sources, nonpituitary gonadotropin stim-
9 A4 D" k7 g* I; i$ i ~9 Lulation, and rare activating mutations.3 Virilizing3 w# q q3 y/ k0 P, a
congenital adrenal hyperplasia producing excessive8 h8 [+ o1 P- Z1 ~) o& ~
adrenal androgens is a common cause of precocious# x' a5 Y; G# S5 R
puberty in boys.3,4
5 t% }; l- S! ?5 wThe most common form of congenital adrenal
9 l: g6 q9 ]0 [$ N) z& Khyperplasia is the 21-hydroxylase enzyme deficiency.) T" Y1 U& h+ O, r! i4 Y
The 11-β hydroxylase deficiency may also result in
+ k) t7 I' ]+ L2 F' r/ [2 u, Rexcessive adrenal androgen production, and rarely, p7 q# s3 M! F6 s& l
an adrenal tumor may also cause adrenal androgen
0 k2 e9 u# X+ D6 ]4 h- lexcess.1,3! u( u# g' `2 U* h
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
3 b1 p" `& X: W7 i5 }542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
8 _* R$ A. d# E1 M. j# q. Q1 `A unique entity of male-limited gonadotropin-8 P/ B" l3 b/ M9 i4 r
independent precocious puberty, which is also known2 L$ [; z" `1 S k2 x6 w# d" U
as testotoxicosis, may cause precocious puberty at a3 S l5 |" h- U! z: t3 f8 f$ I( P
very young age. The physical findings in these boys+ E$ n6 _! i8 \, ^' T' }
with this disorder are full pubertal development,
+ L) |3 H9 z$ F, s) s, }+ G9 oincluding bilateral testicular growth, similar to boys
( V! X$ B' e1 `9 q% N! jwith CPP. The gonadotropin levels in this disorder
' t4 ]/ d1 U6 p* kare suppressed to prepubertal levels and do not show
4 ?3 y. L+ E" q; d& o0 {' Jpubertal response of gonadotropin after gonadotropin-. T6 i1 F R ^: a
releasing hormone stimulation. This is a sex-linked/ p$ R6 J! `8 q( u( o
autosomal dominant disorder that affects only
: j f* j& k4 E5 c V( Cmales; therefore, other male members of the family! V G0 v- m$ s; v9 Z% ^1 I
may have similar precocious puberty.30 }; j0 S) Z: l$ b5 l% d' Z
In our patient, physical examination was incon-
: G, T/ v% Y% M3 X5 m: r3 F2 g/ I1 ysistent with true precocious puberty since his testi-
" T" X; _1 l' J$ d' @3 Y8 icles were prepubertal in size. However, testotoxicosis
& ^8 t7 E4 e% j) ^0 Zwas in the differential diagnosis because his father! B3 b9 [% U. h7 Z* F# d& n
started puberty somewhat early, and occasionally,
' m$ ^8 w3 V' {+ P2 ztesticular enlargement is not that evident in the
g& \4 w2 i) J6 B3 M' E; A8 G. Wbeginning of this process.1 In the absence of a neg-
4 ^+ G# \4 E/ l N0 C% Q6 \ative initial history of androgen exposure, our
9 m& r6 M" }( tbiggest concern was virilizing adrenal hyperplasia,
( @9 b; w: f4 J, a2 `* keither 21-hydroxylase deficiency or 11-β hydroxylase% A+ L7 X {4 a1 j+ q, t: M' Y
deficiency. Those diagnoses were excluded by find-
0 R' d5 t: l0 I+ F+ w$ ning the normal level of adrenal steroids.* z2 h, |) A4 }3 O/ \8 j4 H
The diagnosis of exogenous androgens was strongly. o# }6 _, Q% s
suspected in a follow-up visit after 4 months because) H3 t: q, T, ~5 |9 N
the physical examination revealed the complete disap-& e' g' F% v4 v7 S5 \
pearance of pubic hair, normal growth velocity, and
" P8 R4 w3 m- z0 M# f$ Sdecreased erections. The father admitted using a testos-
c8 q9 y4 `8 N6 Y+ V( uterone gel, which he concealed at first visit. He was0 S* A5 l& w4 S: i. e
using it rather frequently, twice a day. The Physicians’
' Q0 j* P+ j+ p/ C& UDesk Reference, or package insert of this product, gel or, ?* @* S' j( k: P6 A
cream, cautions about dermal testosterone transfer to
3 Z0 L' t2 g/ Q( s0 E. p$ C& S# h! nunprotected females through direct skin exposure.
+ h1 D9 x8 i9 h& r# T# CSerum testosterone level was found to be 2 times the
* q. H+ {1 ]& A% P! H9 ~baseline value in those females who were exposed to! ?5 R# j/ x: t( X4 A* s3 S8 G/ N4 E
even 15 minutes of direct skin contact with their male
) a4 @2 ~2 F# }6 ^partners.6 However, when a shirt covered the applica-
+ `8 A3 ]" T! ?) q& Ytion site, this testosterone transfer was prevented.4 x% [) a7 i) r8 P X* c, A
Our patient’s testosterone level was 60 ng/mL,# Y; `8 k; o4 S
which was clearly high. Some studies suggest that* e" R! P7 I( q3 }/ a, g. `+ V
dermal conversion of testosterone to dihydrotestos-
% u2 V; W. Z" D. Yterone, which is a more potent metabolite, is more
$ |& g/ _9 U0 p, Y# _active in young children exposed to testosterone( }' I( n. z; {1 ]
exogenously7; however, we did not measure a dihy-* p0 o+ ~' h: n ~: A
drotestosterone level in our patient. In addition to
# \& R# {. ~) _' Y( H4 W3 {virilization, exposure to exogenous testosterone in, j x: O# R( |0 y0 ^1 B4 N
children results in an increase in growth velocity and! }( ?6 S1 e: k8 T* {5 w: n
advanced bone age, as seen in our patient.; I/ H$ y9 }2 T+ n5 a
The long-term effect of androgen exposure during5 u, Z9 k0 D: c R6 Y/ G
early childhood on pubertal development and final
6 ?/ V' g: x, i* W6 O" tadult height are not fully known and always remain: \! f, P3 A; N% }8 `
a concern. Children treated with short-term testos-
, b8 [* g+ h) S; v) C$ Y( }terone injection or topical androgen may exhibit some
w. X' W* k3 t7 Y' B/ Macceleration of the skeletal maturation; however, after
+ H4 g8 E, M$ F$ x R# F5 gcessation of treatment, the rate of bone maturation4 v0 q& g3 a, w- I0 U* P" k
decelerates and gradually returns to normal.8,91 z, R E2 h/ b+ `& R
There are conflicting reports and controversy
5 k8 V( U% a1 F# Nover the effect of early androgen exposure on adult
0 n6 x/ C, ]: C( Epenile length.10,11 Some reports suggest subnormal+ M6 I" I/ t- Z+ J0 S# ?
adult penile length, apparently because of downreg-+ u6 Y, b7 x5 z" L5 H' V
ulation of androgen receptor number.10,12 However,
* Z+ o# ^: h0 B8 g4 A; Q7 n$ GSutherland et al13 did not find a correlation between
9 X! E- Z* G3 @# h1 S* z# Ochildhood testosterone exposure and reduced adult
. x8 p& k9 S5 l% r3 r! h) Q1 _penile length in clinical studies.
/ u8 r, ^% d: f8 pNonetheless, we do not believe our patient is
9 M, B( N: Y; ~; agoing to experience any of the untoward effects from9 L1 R/ l$ W- b1 z
testosterone exposure as mentioned earlier because
' b% `! l- _" N4 Y& {% Rthe exposure was not for a prolonged period of time.
! G( f! q0 R9 V# c7 uAlthough the bone age was advanced at the time of: A/ V$ E+ P5 g' c6 U5 F& u: Q8 |1 u
diagnosis, the child had a normal growth velocity at
+ i! B* f+ w" E0 M4 v5 Ithe follow-up visit. It is hoped that his final adult5 h8 U" S4 n% B5 ~; O9 f* w
height will not be affected.; r$ j* Z& R$ C2 a D9 u# ^
Although rarely reported, the widespread avail-, Z0 @! ?; n5 g! |1 M5 V
ability of androgen products in our society may9 y/ ?* q: s5 P7 R' e! q( }
indeed cause more virilization in male or female
: h' _1 d9 P y. u* q. N% @children than one would realize. Exposure to andro-0 c# R9 ~. K' E% g: K) j [ c* |
gen products must be considered and specific ques-
( O, F& m2 A, K3 ?tioning about the use of a testosterone product or5 B" Z. `" ~1 D7 |( L6 j" ] ]
gel should be asked of the family members during
2 l# G( E8 g+ _the evaluation of any children who present with vir-6 F+ ?" }9 J5 F% F( q" x0 V. w3 k
ilization or peripheral precocious puberty. The diag-5 n5 \0 f& W3 U6 f0 O
nosis can be established by just a few tests and by# e# i( J5 L$ v6 w8 E
appropriate history. The inability to obtain such a
1 O" v+ k6 K2 w+ @2 Fhistory, or failure to ask the specific questions, may a; u: m0 p( w" J
result in extensive, unnecessary, and expensive9 l- A6 A; S" R+ x' q* Z5 ^
investigation. The primary care physician should be6 ?$ j& a1 |( n! \
aware of this fact, because most of these children6 d C" R9 W) k, H& N
may initially present in their practice. The Physicians’6 ?; s& C$ L. w% R/ V
Desk Reference and package insert should also put a1 d; [0 v6 x2 ]5 i% S
warning about the virilizing effect on a male or
* V+ E A2 B! ^- g1 F: H: |$ cfemale child who might come in contact with some-: }0 U+ G5 y( Q0 N' T1 d
one using any of these products.
) E) ]7 I+ @0 K# G% M! B1 DReferences" P. g. x) t. s: E K
1. Styne DM. The testes: disorder of sexual differentiation
4 Y* w0 y+ s1 G% U0 \and puberty in the male. In: Sperling MA, ed. Pediatric9 h- T9 \, y- N4 F/ X
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
) I h9 h5 o) l$ N$ b2002: 565-628.! I0 X- U* E) K" B
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious$ V. u G7 m% K) {( Y; t; N
puberty in children with tumours of the suprasellar pineal
, _ C: @0 A- uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from# {/ B; }9 P9 C! e
Topical Testosterone Exposure / Bhowmick et al 543
$ b" z4 }+ w5 }; v4 {" dareas: organic central precocious puberty. Acta Paediatr.
# j6 q2 O+ i7 f2 M9 u2001;90:751-756.
: n& u2 E+ n& v1 ]3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.5 z' H' o: L. i: @) h' c
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
8 [% F9 N% R. K$ _% v+ {; e* @& K' RDekker Inc; 2003:211-238.
( [- f! Q( M% N5 J d$ W5 P% @4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual" d3 W, x2 b5 w
development in a two-year-old boy induced by topical4 Q8 e1 e6 _9 F" W1 v
exposure to testosterone. Pediatrics. 1999;104:e23.% ^: W6 h! \2 J% C
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
! ]% _6 O1 F- `* Q: q7 B' B+ j+ @2 OSkeletal Development of the Hand and Wrist. 2nd ed.
6 I' |) U- U% \* UStanford, CA: Stanford University Press; 1959.9 c1 v0 {: H! [: k% R# {8 F. C: }
6. Physicians’ Desk Reference. Androgel 1% testosterone,
G3 X3 Q0 ~ PUnimed Pharmaceutical Inc. Montvale, NJ: Medical; N+ {5 `/ h2 o- i) F
Economics Company, Inc; 2004:3239-3241.
7 S4 T6 a( J4 ?( \# t: @7. Klugo RC, Cerny JC. Response of micropenis to topical8 b. y& }- X/ l8 j* |% c
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