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is a significant concern for physicians. Central7 _* h+ x7 C" `/ Q" p
precocious puberty (CPP), which is mediated6 F2 s3 N3 B" y: Q) X4 W
through the hypothalamic pituitary gonadal axis, has* o5 ]" r$ @5 i7 {
a higher incidence of organic central nervous system, t4 C/ `! }' v3 B( G3 w0 s5 t6 H3 c
lesions in boys.1,2 Virilization in boys, as manifested& a" `% {' x8 v5 T
by enlargement of the penis, development of pubic a- C, ^$ Y6 }9 s; y- K$ s
hair, and facial acne without enlargement of testi-6 G4 W6 e8 C. }6 @0 q8 I
cles, suggests peripheral or pseudopuberty.1-3 We
% H# w! S: {- c* M/ Areport a 16-month-old boy who presented with the/ g* G2 \( P' v
enlargement of the phallus and pubic hair develop-: U. R5 [5 r7 l7 ^- o- L
ment without testicular enlargement, which was due
0 ~. l! c+ H& g& y* N$ cto the unintentional exposure to androgen gel used by
/ U* U1 O9 J; o4 P! Hthe father. The family initially concealed this infor-
! e3 U+ k+ E+ Z. O- ~" b( t! s' ^mation, resulting in an extensive work-up for this
& w) f- V: X% p* Bchild. Given the widespread and easy availability of# x& b. H4 m! T7 k# i A
testosterone gel and cream, we believe this is proba-# o$ A7 u6 J# h6 o* k
bly more common than the rare case report in the! g$ N0 [! `7 u1 Y1 P
literature.4
$ y# O6 j$ R) D! WPatient Report
$ |8 `: K3 F7 {6 x; O# OA 16-month-old white child was referred to the# Y/ u7 P L" d+ c- m( h
endocrine clinic by his pediatrician with the concern0 y+ q8 E8 W4 M% l* A
of early sexual development. His mother noticed% a- y: f$ D$ n" _$ m7 K: E& H+ u
light colored pubic hair development when he was( \1 w& p4 a6 ]
From the 1Division of Pediatric Endocrinology, 2University of0 Z; f: z$ `* k9 Q6 b
South Alabama Medical Center, Mobile, Alabama.2 G+ J$ a/ |: d9 J" Y
Address correspondence to: Samar K. Bhowmick, MD, FACE,( ~0 U; U1 F ^: d
Professor of Pediatrics, University of South Alabama, College of
' x- J! {5 f# K5 DMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
3 Z; b5 a( h! V8 }e-mail: [email protected].
+ `. F! w8 X) |8 R7 V1 aabout 6 to 7 months old, which progressively became
0 y8 e- D. `! r% o6 Cdarker. She was also concerned about the enlarge-6 K% \) Z; Y$ j7 y; ?( U0 B5 T
ment of his penis and frequent erections. The child
( m$ a6 i! o8 z l5 v5 C/ j+ h0 swas the product of a full-term normal delivery, with
6 r" ?. L/ ], Sa birth weight of 7 lb 14 oz, and birth length of5 C$ D7 ]! u$ q/ W; f
20 inches. He was breast-fed throughout the first year
l6 L2 @0 N" q9 D$ m1 ~; W- zof life and was still receiving breast milk along with O- _. J! m5 K9 D# J4 F
solid food. He had no hospitalizations or surgery,
9 T2 V/ S9 V1 q9 p: u* ^ y& T5 Kand his psychosocial and psychomotor development
. }1 i+ e* ^7 }6 j C' i) lwas age appropriate.% c3 a9 A/ C9 Z# `. \7 m# W( Y3 ^7 ?8 R* Y. T
The family history was remarkable for the father,# e0 `4 s4 M1 J* x
who was diagnosed with hypothyroidism at age 16,
# s( {* [+ i7 m4 h, P" Qwhich was treated with thyroxine. The father’s& q+ y% ~% z. N$ ~9 Y9 `
height was 6 feet, and he went through a somewhat( k9 S4 n! L' j
early puberty and had stopped growing by age 14.
# x$ n+ t9 e. i- h8 F; w8 sThe father denied taking any other medication. The% X$ @, c0 f5 l2 ^. _' D, H- G0 L- [" W
child’s mother was in good health. Her menarche' K- L- X( j0 y$ J, b
was at 11 years of age, and her height was at 5 feet
6 I y) L7 S9 _8 E5 inches. There was no other family history of pre-7 l f+ ~+ E7 v3 ~
cocious sexual development in the first-degree rela-
$ `2 F1 w! `6 N+ A( H6 B* z6 Jtives. There were no siblings.
2 `* x+ N; }; E' l" H; Z2 L4 iPhysical Examination
$ \: ~3 C7 \# q( |6 e+ cThe physical examination revealed a very active,# m( S, h, S* b4 Y+ _) W1 A# }
playful, and healthy boy. The vital signs documented& ], P- N: k9 W& ~5 z2 B0 L
a blood pressure of 85/50 mm Hg, his length was
}7 p" p0 P( l( H- C90 cm (>97th percentile), and his weight was 14.4 kg
9 T8 b! X# ^) P- `(also >97th percentile). The observed yearly growth
' _$ t' m3 h: H$ @) d$ w( p9 Evelocity was 30 cm (12 inches). The examination of
, I/ h( B" ]# q- Zthe neck revealed no thyroid enlargement.3 l6 \) i$ G3 [1 {5 d
The genitourinary examination was remarkable for N; t% ^+ I* n- {9 R3 N5 U
enlargement of the penis, with a stretched length of
- \$ i/ m1 Q4 Q& u$ v6 V8 cm and a width of 2 cm. The glans penis was very well2 c* `4 J6 s& t
developed. The pubic hair was Tanner II, mostly around
' k. I$ y! P( O) ^& v. Q5 h540
7 I& S6 H2 ~/ yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ i' Q+ U2 G) R0 Q2 [the base of the phallus and was dark and curled. The+ ?; K1 D: U% P+ R: l
testicular volume was prepubertal at 2 mL each.- o# a+ |4 d2 G/ w
The skin was moist and smooth and somewhat! @* ^5 h: |' f2 s% z# a+ Q$ a
oily. No axillary hair was noted. There were no
9 \, \+ N6 ?6 w: Fabnormal skin pigmentations or café-au-lait spots.
2 j3 y f. p4 F7 s* LNeurologic evaluation showed deep tendon reflex 2+- {. } m8 j: I+ Q: ?( p" b" i
bilateral and symmetrical. There was no suggestion
+ J* V) S$ s5 C' I& xof papilledema.
' n, f* J% D, P ~0 |Laboratory Evaluation! S/ _6 ~# C- Y8 W/ q3 I
The bone age was consistent with 28 months by
8 |$ [ H" X4 E( N7 g" Jusing the standard of Greulich and Pyle at a chrono-
* Z0 p% j% Y4 u0 B1 t, k* clogic age of 16 months (advanced).5 Chromosomal' x$ E& B. i0 g; z8 Q, Q; K8 U
karyotype was 46XY. The thyroid function test
* g6 _" M9 p" q; v- w% M* @showed a free T4 of 1.69 ng/dL, and thyroid stimu-
* D' j+ U; Z" k( J7 H O' \lating hormone level was 1.3 µIU/mL (both normal).
4 l& W$ g' @3 o K, `( G: gThe concentrations of serum electrolytes, blood
; w8 r' ^1 [8 uurea nitrogen, creatinine, and calcium all were
- k" F9 H7 X" d; ?. o3 qwithin normal range for his age. The concentration1 i/ Q. z& M5 B+ m* {3 g" z1 R9 w
of serum 17-hydroxyprogesterone was 16 ng/dL
$ h/ |/ W& m; F, s G2 }(normal, 3 to 90 ng/dL), androstenedione was 20; b" J, g' |0 D) w" x
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
" {, z' J2 _1 P# Xterone was 38 ng/dL (normal, 50 to 760 ng/dL),
' r# n$ X) h; |, {- x3 g, l5 K0 vdesoxycorticosterone was 4.3 ng/dL (normal, 7 to8 c3 A* [, o' }* h; N* I0 r8 r
49ng/dL), 11-desoxycortisol (specific compound S)
2 G6 a! f& `8 u8 p iwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
* y9 G- k2 {" l9 o9 i# [tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
: @0 Z0 U5 x1 ] L( \8 Q3 C4 {3 ]testosterone was 60 ng/dL (normal <3 to 10 ng/dL),. ]: g) `) O$ q
and β-human chorionic gonadotropin was less than" }6 t W, F. Z( [1 \( H/ B2 {
5 mIU/mL (normal <5 mIU/mL). Serum follicular4 O# o0 I. Y6 ]7 }# P% ]# j
stimulating hormone and leuteinizing hormone# ~! }( ?# ?; R0 `0 j
concentrations were less than 0.05 mIU/mL
" [ M. Z! J- [5 _+ @(prepubertal).; D' |. Q& z! |9 O8 w3 X* M
The parents were notified about the laboratory
- n% k6 \! q% x6 j7 dresults and were informed that all of the tests were
^% _0 E) X- p/ nnormal except the testosterone level was high. The/ K/ Q3 ?* j, g8 X/ X) e% X
follow-up visit was arranged within a few weeks to
! _. C0 J* H& Q- V" Z- B, uobtain testicular and abdominal sonograms; how-3 n" M9 y4 J! r2 W% r- `1 Z
ever, the family did not return for 4 months.
% l$ g% |, D& ~5 u0 m1 I; O$ yPhysical examination at this time revealed that the
1 Y. h7 c m( u/ Jchild had grown 2.5 cm in 4 months and had gained
5 F7 u" q% Y; @) g/ Z/ R2 kg of weight. Physical examination remained
# M, b) ]; C8 wunchanged. Surprisingly, the pubic hair almost com- l0 {; _# ~# j
pletely disappeared except for a few vellous hairs at
1 W; F1 A( ?6 T8 Q+ pthe base of the phallus. Testicular volume was still 2
0 l! `3 W* T' Z9 y$ GmL, and the size of the penis remained unchanged.6 K1 I+ n& u+ D! C
The mother also said that the boy was no longer hav-
6 l2 m G2 U$ Y! e3 v1 ~; king frequent erections.
5 e$ p6 U; @: I zBoth parents were again questioned about use of" R# J# w+ p; S; i6 p" J
any ointment/creams that they may have applied to
+ r" ?' ^. L" O+ j0 ?9 Rthe child’s skin. This time the father admitted the
. o3 L3 J3 P( S( o0 @4 WTopical Testosterone Exposure / Bhowmick et al 541
1 g5 c6 y9 ^% J$ }! r% H" tuse of testosterone gel twice daily that he was apply-
9 S" B6 X- G0 u7 a/ q( s; ding over his own shoulders, chest, and back area for# {7 A l& z# n1 x) J6 A6 R2 X
a year. The father also revealed he was embarrassed8 C5 e A0 M# k
to disclose that he was using a testosterone gel pre-
- y, a" E8 x/ {8 W" ?% dscribed by his family physician for decreased libido
* i- i+ J' |. f' F' o7 Jsecondary to depression.
. L- `4 p0 T! f8 z2 F( HThe child slept in the same bed with parents.
6 S& J( P% W% |( \# DThe father would hug the baby and hold him on his
; e. }& v/ `4 w9 ~ H& Fchest for a considerable period of time, causing sig-
# a' x( {$ W6 U6 y% r4 Q' lnificant bare skin contact between baby and father.5 ^/ U6 M3 G/ `- `- T
The father also admitted that after the phone call,' f5 A: j1 y8 ^: N( W3 N
when he learned the testosterone level in the baby* J: @% q2 J6 _
was high, he then read the product information
1 R U4 V1 K! J$ upacket and concluded that it was most likely the rea-
) o: m3 s# [* Q4 s9 I% G) Ason for the child’s virilization. At that time, they
# c+ Q( g" Y% M" t f4 Qdecided to put the baby in a separate bed, and the; j# z7 j8 h% F
father was not hugging him with bare skin and had5 k# _" S* R7 ]) N( ~# _7 K
been using protective clothing. A repeat testosterone1 d' X# ~' t5 @: {& G/ j
test was ordered, but the family did not go to the
8 \% \+ _4 t2 O3 [0 zlaboratory to obtain the test.
9 W% X+ |. b+ |Discussion
( t9 ~5 P# V' l0 w% ?& p5 ]Precocious puberty in boys is defined as secondary
6 o! V8 u" D. F2 j; n* m4 Tsexual development before 9 years of age.1,4
7 O. w7 l% I, d5 a% n+ [" S% l, ePrecocious puberty is termed as central (true) when
J5 V0 q X d5 p, Bit is caused by the premature activation of hypo-& V$ P. H; s; W' u
thalamic pituitary gonadal axis. CPP is more com-
4 N; _5 ^& e r7 ]) S/ Imon in girls than in boys.1,3 Most boys with CPP5 M* z5 t* R7 [! J# [
may have a central nervous system lesion that is/ c. w: D* }6 U: f" r+ o1 D
responsible for the early activation of the hypothal-1 {0 r o+ `( b1 G) f: w' R
amic pituitary gonadal axis.1-3 Thus, greater empha-& `4 E, N/ Y8 A; z9 l$ x" n
sis has been given to neuroradiologic imaging in% r2 h, Q0 |- ]6 Q
boys with precocious puberty. In addition to viril-
, B" L% k) Z; A& Iization, the clinical hallmark of CPP is the symmet-
& Z5 x. u5 S; h9 `; e! g5 R+ `/ Erical testicular growth secondary to stimulation by( z# ]$ N# ~: ]
gonadotropins.1,3
7 i8 q3 K& E! oGonadotropin-independent peripheral preco-" r, q6 ~# Y, o$ n4 H2 E
cious puberty in boys also results from inappropriate
6 |8 {! N4 a, i; [androgenic stimulation from either endogenous or
1 J$ a) ` D8 I6 Cexogenous sources, nonpituitary gonadotropin stim-. x0 S4 i: V l& H
ulation, and rare activating mutations.3 Virilizing7 f- J. r* N: D2 `' W# ]
congenital adrenal hyperplasia producing excessive$ R: y m$ w6 D
adrenal androgens is a common cause of precocious
, g j: G' W/ Y, Cpuberty in boys.3,4- n. D1 i8 o& V1 m! W
The most common form of congenital adrenal' \0 H" d b! P+ a6 e k
hyperplasia is the 21-hydroxylase enzyme deficiency.
+ H8 r$ C' R, p% ~8 P$ X* H) CThe 11-β hydroxylase deficiency may also result in
. a! W" b" E9 p! z' @7 xexcessive adrenal androgen production, and rarely,
+ E- a& c( B8 T* V1 V# ^/ T. Fan adrenal tumor may also cause adrenal androgen
7 n1 q9 J, y K+ i$ |- ^+ kexcess.1,3
( e/ X, w* P" A* ]at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
; p7 g9 Z- J0 A- U" ]5 b1 R542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
2 _, a+ w6 i r1 j k: M9 dA unique entity of male-limited gonadotropin-
) m, h2 N2 _' F5 J4 G! ^( Mindependent precocious puberty, which is also known: B# z+ f: J/ Z+ t, q
as testotoxicosis, may cause precocious puberty at a
9 }( c5 N0 j9 s8 o% M6 n7 f# Hvery young age. The physical findings in these boys
( Y+ C/ I1 \4 P, X- Hwith this disorder are full pubertal development,$ H. |& _+ {$ c" l, U; Z0 ]
including bilateral testicular growth, similar to boys1 w0 r- N+ K; ]9 U5 Y+ E! m- V
with CPP. The gonadotropin levels in this disorder
: m) x5 c# a1 e0 B/ y7 Uare suppressed to prepubertal levels and do not show# C+ \6 v" U! f/ d
pubertal response of gonadotropin after gonadotropin-
0 Q! T, a# ^: b& Vreleasing hormone stimulation. This is a sex-linked
' ^. b2 [, @4 A' c, n2 h+ _$ p( {9 [autosomal dominant disorder that affects only% ?4 E2 t+ F2 u3 f+ x1 ?( r3 h B
males; therefore, other male members of the family
r. {" P" k2 f3 h0 Y% Y8 k. fmay have similar precocious puberty.3
1 E B: z& h) g( _# ?In our patient, physical examination was incon-$ _* y. t7 Z& K4 z5 u' v
sistent with true precocious puberty since his testi-
/ O! y7 A4 G. Tcles were prepubertal in size. However, testotoxicosis
0 Q" z, T+ W- Q7 o) [4 nwas in the differential diagnosis because his father% |4 Q s S& N7 P( B% K
started puberty somewhat early, and occasionally,& U/ Z1 P' W8 O# m5 n9 j
testicular enlargement is not that evident in the* y% z, R1 a" P, W0 K
beginning of this process.1 In the absence of a neg-
* P2 f7 O, o7 {0 i1 R4 ~8 ]+ [ative initial history of androgen exposure, our
8 x* J, Y- M5 Abiggest concern was virilizing adrenal hyperplasia,
6 ]% I0 {; ?0 R; ?" deither 21-hydroxylase deficiency or 11-β hydroxylase
! u: U3 `% y B1 |$ odeficiency. Those diagnoses were excluded by find-
3 i* g* o1 s x( e# cing the normal level of adrenal steroids.0 c. f J+ o( u
The diagnosis of exogenous androgens was strongly7 V) f2 @- F* m/ g4 P6 g
suspected in a follow-up visit after 4 months because% G) P6 O( C. }$ t+ a8 F- K
the physical examination revealed the complete disap-
1 B9 _' f9 |, P3 Vpearance of pubic hair, normal growth velocity, and
" z+ m _* ^* O+ G8 i; c `( r/ m: u2 edecreased erections. The father admitted using a testos-
1 J3 o l; a7 a* O: B4 j6 aterone gel, which he concealed at first visit. He was) ^; f, x/ h5 ^& B# x
using it rather frequently, twice a day. The Physicians’/ K: c# p& T `# \
Desk Reference, or package insert of this product, gel or6 ^5 u ^( V2 `% t- x- G
cream, cautions about dermal testosterone transfer to
* Z" G+ I! ?) runprotected females through direct skin exposure.
2 d; j- e6 w$ _Serum testosterone level was found to be 2 times the/ m: m8 H3 H$ x; s4 E
baseline value in those females who were exposed to7 _+ S& W8 }. h0 R( K0 ?
even 15 minutes of direct skin contact with their male
$ k/ P* X+ k! a" {, G6 ]" o# B% hpartners.6 However, when a shirt covered the applica-, C: |" D2 ^8 K+ {. T
tion site, this testosterone transfer was prevented.
9 Y+ h- j: F: Z6 |8 s0 U, rOur patient’s testosterone level was 60 ng/mL,
5 V" P t) r( u E" {which was clearly high. Some studies suggest that
/ R6 b) U7 { R4 o- v: u+ A* ldermal conversion of testosterone to dihydrotestos-- A/ z, K2 h1 C/ _
terone, which is a more potent metabolite, is more, k8 Y: m* H9 E$ `2 E
active in young children exposed to testosterone
4 q; m. p" Z6 O" `exogenously7; however, we did not measure a dihy-
5 t- A& ?/ B4 q6 [( xdrotestosterone level in our patient. In addition to
8 j) d4 K$ L6 r1 \9 {virilization, exposure to exogenous testosterone in
" t) Y$ b) }9 N8 G! o2 c5 Y1 \( lchildren results in an increase in growth velocity and, K8 S- p: y. ?" {. a3 |
advanced bone age, as seen in our patient.* e* C. |3 o) r3 @+ O4 Q
The long-term effect of androgen exposure during k' r6 w7 Z7 S) K6 E! p
early childhood on pubertal development and final
# p" V4 {1 R: v* t0 b8 ^. C' ladult height are not fully known and always remain) ?- P, T' s% n( X- U4 }* ]
a concern. Children treated with short-term testos-
, y) h1 T: U+ h t7 s. E5 Bterone injection or topical androgen may exhibit some
' ?% c8 ^) N/ G, k1 ^acceleration of the skeletal maturation; however, after
! t1 O6 t& T. ]6 N9 f! dcessation of treatment, the rate of bone maturation
% T# M0 Q& X m/ n) Jdecelerates and gradually returns to normal.8,9
' v3 F& v! j- D% m8 m: f1 p& gThere are conflicting reports and controversy
8 ?2 z, Y5 _, C4 i( V1 v7 x* d9 wover the effect of early androgen exposure on adult
8 J( X. E# [: z rpenile length.10,11 Some reports suggest subnormal
/ A5 j( {/ H6 u0 Sadult penile length, apparently because of downreg-4 z9 l3 g9 h) G% ]4 W2 ^6 \8 @* w
ulation of androgen receptor number.10,12 However,+ }, T8 L: W6 O6 q- J
Sutherland et al13 did not find a correlation between0 _: R7 h* |0 f0 w! {3 h: b6 W
childhood testosterone exposure and reduced adult' I! c/ K, l0 j# O4 X% u
penile length in clinical studies.
5 i% a; f, L' G7 w: A* X' r! ONonetheless, we do not believe our patient is2 e b( w: Z% ^
going to experience any of the untoward effects from
9 w6 R# R- V% `: r- {testosterone exposure as mentioned earlier because6 C5 v& w: B8 j3 F$ L7 |/ Q# w
the exposure was not for a prolonged period of time.
% @" c. n h- A% N5 H0 I, ~* NAlthough the bone age was advanced at the time of
: |) M/ V m( A2 l! j; gdiagnosis, the child had a normal growth velocity at
! G7 K# R5 g/ W0 K6 othe follow-up visit. It is hoped that his final adult
+ Y$ l) x g6 \4 f+ ~1 yheight will not be affected.( H% `. A" X' F* u1 t
Although rarely reported, the widespread avail-! r4 s9 ^! o0 J$ W f
ability of androgen products in our society may h! a' M. c) K6 N, [
indeed cause more virilization in male or female
+ L$ {8 l! X. tchildren than one would realize. Exposure to andro-% u7 K: i0 k2 k& ^5 }% l
gen products must be considered and specific ques-
/ F+ b h5 G- Ytioning about the use of a testosterone product or' U1 H) N& x- M: S2 a- X: e C
gel should be asked of the family members during" J( u$ T' j; Z' j; F
the evaluation of any children who present with vir-
( C5 f8 G. ^2 z# g8 Q$ {- A) U& Jilization or peripheral precocious puberty. The diag-
" e2 P2 k% r$ ] R4 `2 inosis can be established by just a few tests and by' j+ T I5 v L: b( U
appropriate history. The inability to obtain such a6 n( M6 T# w! V5 r& W8 Z* d
history, or failure to ask the specific questions, may
; T4 u [6 e% _0 o# b; zresult in extensive, unnecessary, and expensive7 g5 A0 H/ ]6 D8 ^* j% H
investigation. The primary care physician should be
# m+ A2 t$ q2 w- U- @8 |& K% Saware of this fact, because most of these children
; y1 R2 w+ E; J, a; x* J; ]5 k; _may initially present in their practice. The Physicians’
; ~5 G. S& o: m" e/ pDesk Reference and package insert should also put a4 \, g1 q4 m5 t2 ?
warning about the virilizing effect on a male or, O2 k& d, T! s3 z" `
female child who might come in contact with some-. d' F }9 W+ O! `
one using any of these products.
- S4 |$ g2 X/ a9 ~References
* ]- h! e9 R9 |/ [1 ~/ ?1. Styne DM. The testes: disorder of sexual differentiation8 z* B" l8 m# _+ P& A7 f5 G
and puberty in the male. In: Sperling MA, ed. Pediatric
4 ]) T4 O8 P5 A$ {Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;- u. \ f1 D x% T0 Q/ ^
2002: 565-628.; O0 b5 X7 j: x& t: o' u5 I
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious/ B+ T0 S; f) B1 f+ x, b1 r
puberty in children with tumours of the suprasellar pineal0 K+ R [. m- Q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from# W, {* \* Q$ i1 w" ]- x% G
Topical Testosterone Exposure / Bhowmick et al 543
( A/ j; w6 O, {0 A' k8 X( z, z9 F8 Nareas: organic central precocious puberty. Acta Paediatr. l% R+ w, s% c- Q6 \* T- u5 H& b
2001;90:751-756.* v0 F" U$ M5 b9 S: b& T6 Z5 f
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.# T& r7 o9 [: E+ M0 K1 O
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
/ s2 J8 Z# h+ U* P9 B5 i- _: |Dekker Inc; 2003:211-238.1 b8 f: C( P. E. g/ \
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual) t5 Q \% Q7 H8 l. p ?
development in a two-year-old boy induced by topical8 S. W+ O l7 Q/ P
exposure to testosterone. Pediatrics. 1999;104:e23.& t# i2 k) y; D; [* V( }. ^
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
% i& o7 m+ J4 n& QSkeletal Development of the Hand and Wrist. 2nd ed.6 D2 }$ {0 F/ \' V. S: i. U
Stanford, CA: Stanford University Press; 1959.+ i9 }, _& l* m' K- G; R. P
6. Physicians’ Desk Reference. Androgel 1% testosterone,, R5 B) B2 e5 T* e' m: t/ ^( }
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
( D8 b& w3 v5 N; x- Z$ LEconomics Company, Inc; 2004:3239-3241.+ m1 V' g' {1 Y1 a) u$ v
7. Klugo RC, Cerny JC. Response of micropenis to topical5 i* j' v; ^1 |* G) Q$ f
testosterone and gonadotropin. J Urol. 1978;119:
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