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is a significant concern for physicians. Central- u8 c$ D6 a9 Z8 J" U: X; O
precocious puberty (CPP), which is mediated7 x, o8 f' Y& ?
through the hypothalamic pituitary gonadal axis, has& U* h% [( }+ o& P& ?3 Q
a higher incidence of organic central nervous system P T7 r1 f3 s O0 Q8 `( l
lesions in boys.1,2 Virilization in boys, as manifested3 G* ]9 d' w( n7 f0 f) N' N! M, s
by enlargement of the penis, development of pubic7 _' ^0 g) p. n0 e/ U
hair, and facial acne without enlargement of testi-
# S) m. `. }: Gcles, suggests peripheral or pseudopuberty.1-3 We
: w! @ t* ?8 c+ X, ^report a 16-month-old boy who presented with the
" y1 A; J( h( j2 D; z; xenlargement of the phallus and pubic hair develop-
% _; L- a& w1 i, I1 q3 Vment without testicular enlargement, which was due
$ E! F* V( O6 e+ Z* h9 L$ Ito the unintentional exposure to androgen gel used by
$ C- d: t, S/ p0 g" Z* Uthe father. The family initially concealed this infor-
4 {& `8 S; H* K' m, ]3 ^mation, resulting in an extensive work-up for this! Y# ?, j/ r# K6 }
child. Given the widespread and easy availability of
/ h- e( T# |* A5 P$ k5 X3 |; Z8 htestosterone gel and cream, we believe this is proba-
4 `8 `' Y4 N( }, D! d& Wbly more common than the rare case report in the
+ S: h- z6 h9 ]literature.4; I. K" o0 i. R" K6 H5 r
Patient Report
4 v1 R& C f# c3 `2 P/ B6 M4 _; EA 16-month-old white child was referred to the
0 P5 P6 E( v1 J$ v7 B) s( j* h, Xendocrine clinic by his pediatrician with the concern
; u$ H6 \1 O/ l- P# Lof early sexual development. His mother noticed0 A, r8 Z9 l0 V) b; X5 d5 _
light colored pubic hair development when he was
' j* t1 T* r& Z6 ?From the 1Division of Pediatric Endocrinology, 2University of
; V& O- V" Q% C$ USouth Alabama Medical Center, Mobile, Alabama.: ^8 p" K$ }, s$ O; y: F+ w% T
Address correspondence to: Samar K. Bhowmick, MD, FACE,$ ~1 [8 _% q+ c+ D* P, G& f. y7 S
Professor of Pediatrics, University of South Alabama, College of
( t8 p, t$ b) S, v, DMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( t8 \3 o# M* T* b8 N9 g
e-mail: [email protected].
: _' p" @% w; Babout 6 to 7 months old, which progressively became! @+ y0 N# @4 {% Y( C$ g3 ]- J
darker. She was also concerned about the enlarge-
8 j% f2 s! Z' N; e5 w$ qment of his penis and frequent erections. The child
$ O2 r9 u8 F" H: G6 j% Rwas the product of a full-term normal delivery, with
3 x! m% {( o! G% x; u! J* ya birth weight of 7 lb 14 oz, and birth length of
: e% c4 [/ u3 |20 inches. He was breast-fed throughout the first year, T% D. H3 p( {, j5 E8 U# o3 o
of life and was still receiving breast milk along with
7 N# [9 k$ I) ]! g6 Z( hsolid food. He had no hospitalizations or surgery,
* U4 N1 A" q2 \and his psychosocial and psychomotor development
6 E* l3 _) J# C6 `% ]was age appropriate.
2 N/ F2 m! O& b4 P& d9 e; Q. uThe family history was remarkable for the father,
: k8 A! }$ y& L' [+ Qwho was diagnosed with hypothyroidism at age 16,2 z }, }; V* m
which was treated with thyroxine. The father’s5 X' t5 @& K% B5 P1 I1 K6 N
height was 6 feet, and he went through a somewhat
$ d6 A+ h$ t# n, K' N! G% vearly puberty and had stopped growing by age 14.9 A+ D5 H3 s+ Q+ i5 w4 S. Y9 Q3 s
The father denied taking any other medication. The
+ W) x( }$ _( Z: Q& Fchild’s mother was in good health. Her menarche% ?) x: ^ {" }
was at 11 years of age, and her height was at 5 feet) {) S; Y9 T6 i7 l" }- s X0 @
5 inches. There was no other family history of pre-
8 i1 j' Q6 J: U0 F& w& s0 Ycocious sexual development in the first-degree rela-
/ X" i9 Q" b; }- @) `% gtives. There were no siblings.
) M# g: d8 ^8 ] ^2 J4 b. A/ Y7 A' {Physical Examination
: }8 h' B5 u' `; }% @The physical examination revealed a very active,8 Z6 t" U U% b- {7 G' ?* g! f2 M
playful, and healthy boy. The vital signs documented
0 ~! ~1 w4 i5 D2 S' |( oa blood pressure of 85/50 mm Hg, his length was/ [3 {" G5 i' f* u" H, [. n( e0 ]
90 cm (>97th percentile), and his weight was 14.4 kg1 |. Z% O Y3 d: M. g
(also >97th percentile). The observed yearly growth8 o# g) \2 J0 h
velocity was 30 cm (12 inches). The examination of
+ n/ S# C9 Z! m8 jthe neck revealed no thyroid enlargement.
) V! k8 n$ Q: D+ LThe genitourinary examination was remarkable for, k: I# h" K6 C/ Q* Z. N- Z( H
enlargement of the penis, with a stretched length of8 W+ w& o" ?5 X
8 cm and a width of 2 cm. The glans penis was very well
) @3 ~9 w. ^$ ]: y0 v* T6 B }developed. The pubic hair was Tanner II, mostly around) M$ P- R( [: }; `: w% N1 T6 t
540 s' s, h" O4 x+ L3 t
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* L0 ~" y) a$ i9 }" }
the base of the phallus and was dark and curled. The: o7 p. S+ N3 B) n
testicular volume was prepubertal at 2 mL each.
1 W9 u! H0 F% [The skin was moist and smooth and somewhat% H/ K! J7 ~, r1 H: j5 G* D: t
oily. No axillary hair was noted. There were no
: u7 x9 w5 q2 d% C; y* Habnormal skin pigmentations or café-au-lait spots., O' A V7 g* a
Neurologic evaluation showed deep tendon reflex 2++ \ e" C- F* b) E1 J7 M
bilateral and symmetrical. There was no suggestion
) e$ A& ]; ~* I& _- k& t% s: Oof papilledema.+ v, t7 D2 N0 z% w; S- e
Laboratory Evaluation1 e- L4 z% `7 P8 p! h; _& v2 z& m
The bone age was consistent with 28 months by
_: a* V0 a" Z5 G! Zusing the standard of Greulich and Pyle at a chrono-+ `; F J+ x. }+ b! k
logic age of 16 months (advanced).5 Chromosomal
4 s2 d1 b7 l3 y' N( l5 Zkaryotype was 46XY. The thyroid function test- ?0 `, U6 D8 E3 g
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
& a; N/ ^" Z5 z4 b' \2 R8 qlating hormone level was 1.3 µIU/mL (both normal). p6 F" n9 R0 p# F* \, m/ @
The concentrations of serum electrolytes, blood
# g O6 c6 v; T) s, d" burea nitrogen, creatinine, and calcium all were8 m: U( d1 R' m1 x+ a6 J
within normal range for his age. The concentration; C' ?/ } N0 v# I% u/ J
of serum 17-hydroxyprogesterone was 16 ng/dL# F: K& ^, _7 P* `) H5 z
(normal, 3 to 90 ng/dL), androstenedione was 20
j6 t$ f6 _2 Q4 u+ rng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
( d/ `' c+ _3 j, h6 r: Sterone was 38 ng/dL (normal, 50 to 760 ng/dL),
7 l* t s4 v& y/ D0 Cdesoxycorticosterone was 4.3 ng/dL (normal, 7 to. x/ ~1 \' L; z
49ng/dL), 11-desoxycortisol (specific compound S): Q, i. ]* \0 {' o) ?/ L
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
. k! H e3 o4 }; p @tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total$ l/ F9 g3 U( O/ ?! K
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),. ?, a5 Y2 I" [! }* b f& v
and β-human chorionic gonadotropin was less than: p/ W% l1 m8 O6 z
5 mIU/mL (normal <5 mIU/mL). Serum follicular
7 _% j! s% p2 fstimulating hormone and leuteinizing hormone$ q6 w4 G/ [ N! U! J) t4 W5 }
concentrations were less than 0.05 mIU/mL4 Q, `, z8 I$ j- F8 c1 f
(prepubertal).! J1 b8 n+ t) K! m( a8 A; D, l# S
The parents were notified about the laboratory
: u( Z+ C8 O+ G8 T& ?$ x* g$ Wresults and were informed that all of the tests were. Y' X( t# A% M+ Z$ [7 E$ T
normal except the testosterone level was high. The3 |8 L+ L6 O7 { B
follow-up visit was arranged within a few weeks to
# j; I4 Q ^$ t" Hobtain testicular and abdominal sonograms; how-! a7 {& [& q/ b4 z( w2 f3 Z9 N
ever, the family did not return for 4 months.$ k8 F/ o% W) S. x( p. v, S
Physical examination at this time revealed that the
" C. ~0 O. u% J1 b. A4 d, }child had grown 2.5 cm in 4 months and had gained
9 _0 h8 s' j2 U2 kg of weight. Physical examination remained
$ x7 l' N3 M0 @$ A. r+ eunchanged. Surprisingly, the pubic hair almost com-
9 o" ]& o& p) I; B' \pletely disappeared except for a few vellous hairs at
, F) ?4 U. K6 T3 f; Kthe base of the phallus. Testicular volume was still 2
v3 Q2 L. ]2 o; q6 [% WmL, and the size of the penis remained unchanged.! J1 a0 f) ]/ m. }
The mother also said that the boy was no longer hav-
! j+ h# m j+ ] B1 x7 x, k# I9 c0 Aing frequent erections.! G* \/ g: H; H& `, n7 [: ] h
Both parents were again questioned about use of" H0 u1 m9 @1 f5 E( e! `8 M
any ointment/creams that they may have applied to
) `6 K8 T) I0 i6 Tthe child’s skin. This time the father admitted the
- z$ t2 J5 K oTopical Testosterone Exposure / Bhowmick et al 5410 }3 t& Z6 O( g0 ]1 Y
use of testosterone gel twice daily that he was apply-5 l- _' @% c, M! T
ing over his own shoulders, chest, and back area for
7 i5 H! ~# Y6 a3 N' Ja year. The father also revealed he was embarrassed. T2 f7 ^( A7 X5 G5 {
to disclose that he was using a testosterone gel pre-
" i+ f( I/ d5 N, Y8 r- B# rscribed by his family physician for decreased libido! f# n7 Z( c9 T# C {
secondary to depression.
/ {. Q! E% O/ ~. _" t& B% j% }! D% F& X2 qThe child slept in the same bed with parents.
3 L3 g+ {, _2 T+ m& _; o9 p: PThe father would hug the baby and hold him on his' n% r7 O. A* X+ M, \- @+ \+ I
chest for a considerable period of time, causing sig-' v3 M$ y3 r: R9 G
nificant bare skin contact between baby and father.
; E: A2 [1 V* N& ~+ J- tThe father also admitted that after the phone call,# l' A2 L. c* p( `" y4 r
when he learned the testosterone level in the baby
9 H; g1 r% [* Q( e) Wwas high, he then read the product information F0 `- r+ b m, g9 }6 H
packet and concluded that it was most likely the rea-
% c! j5 L5 C* c n3 A& k, qson for the child’s virilization. At that time, they: ^1 }+ r$ r) [" X: Q
decided to put the baby in a separate bed, and the5 U9 D) c, X! O- N$ {) W4 w$ B6 W
father was not hugging him with bare skin and had5 x/ @& ~4 b9 s6 b: ^1 J7 |' A# l$ U; ~
been using protective clothing. A repeat testosterone) F, a% P8 X4 n C4 Y+ c0 h ]9 ]
test was ordered, but the family did not go to the
2 u0 x/ a# r; L4 N: F; L7 l! [% jlaboratory to obtain the test.
- x- k m1 V. i' b" x3 Q7 L$ VDiscussion! \! K& E5 h$ m" e5 u
Precocious puberty in boys is defined as secondary
* ]0 r- R/ Q1 c& V% N- Fsexual development before 9 years of age.1,4
; b2 P2 w( C% h# q- ^2 cPrecocious puberty is termed as central (true) when
: d2 A5 P' V; V$ T# }' f9 ^( yit is caused by the premature activation of hypo-
6 C: q2 ]& m# g. P/ |' K/ ^thalamic pituitary gonadal axis. CPP is more com-$ {, V2 S8 [. m+ L
mon in girls than in boys.1,3 Most boys with CPP
9 @ D B8 w. m7 {: E+ k4 ^may have a central nervous system lesion that is
7 @5 v4 T8 m# Vresponsible for the early activation of the hypothal-
& a" e. u E% q2 A, ?: Samic pituitary gonadal axis.1-3 Thus, greater empha-
! y" z# n3 O$ e, {0 esis has been given to neuroradiologic imaging in( C$ ~& T$ K% {+ k/ O
boys with precocious puberty. In addition to viril-
5 S, T8 \* ?7 t& x5 j' d `& Lization, the clinical hallmark of CPP is the symmet-) z+ E, n* }0 P; o% ~
rical testicular growth secondary to stimulation by/ P; ?+ P! j* d* o, `
gonadotropins.1,34 x' o" f3 U) ?, f4 o
Gonadotropin-independent peripheral preco-' g- o% N1 m4 e0 I7 ]0 y' u
cious puberty in boys also results from inappropriate) M9 s- B) q1 t& ^
androgenic stimulation from either endogenous or
/ E8 t% ^7 e4 Sexogenous sources, nonpituitary gonadotropin stim-
' I o0 x O& i% A3 b7 iulation, and rare activating mutations.3 Virilizing1 V) l+ n3 Z# |# V8 c* J
congenital adrenal hyperplasia producing excessive X6 I% S1 l) J! U
adrenal androgens is a common cause of precocious
. _7 a9 h8 G7 ^0 ?puberty in boys.3,4
2 N# k$ n! F% ]3 u4 rThe most common form of congenital adrenal
, `; X! E: I5 D0 Rhyperplasia is the 21-hydroxylase enzyme deficiency.
% T M: A2 I7 x1 N2 {6 KThe 11-β hydroxylase deficiency may also result in
+ n5 Y% Y' i) ?; |0 W5 zexcessive adrenal androgen production, and rarely,
[( v$ l) w/ Z8 A9 T! ?. e, ban adrenal tumor may also cause adrenal androgen6 i2 F+ V5 R3 H* R
excess.1,3 g% A9 {* u& e5 t6 w9 K' F2 T9 R, \2 N
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( n5 w9 i0 y* W% F+ q) m% f
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
8 p! D7 h2 C" | s& Y- |A unique entity of male-limited gonadotropin-: g: V8 z1 d& ]6 e+ j8 e- n6 z( {6 |
independent precocious puberty, which is also known* ]/ c3 Q) x# z$ [
as testotoxicosis, may cause precocious puberty at a
) [" X1 ^8 T3 G- q) C. G% ivery young age. The physical findings in these boys( K, z3 ^' S1 v5 o
with this disorder are full pubertal development,
( _! N \/ A" V8 ^* ]2 Q5 eincluding bilateral testicular growth, similar to boys7 E3 T4 S8 R/ ]4 B
with CPP. The gonadotropin levels in this disorder
- W& K. o9 s* |! n# gare suppressed to prepubertal levels and do not show
* L; n. @( O% d$ e' o: q( @pubertal response of gonadotropin after gonadotropin-
6 u' X3 m3 i$ q% Ureleasing hormone stimulation. This is a sex-linked8 W. ]2 Y+ g, f7 w/ X) Y
autosomal dominant disorder that affects only2 }8 R& Y$ P' P. s1 @6 C
males; therefore, other male members of the family& A! `6 L8 [" J& H6 F9 L
may have similar precocious puberty.31 N/ [/ z+ g3 t3 N2 Y
In our patient, physical examination was incon-
# x, @& F. y# u6 m$ rsistent with true precocious puberty since his testi-/ {6 c3 Q8 j6 M5 `
cles were prepubertal in size. However, testotoxicosis
J- Z3 n4 z/ X" wwas in the differential diagnosis because his father& L; `: {' ]: L$ Z0 \1 q
started puberty somewhat early, and occasionally,: z1 O1 f6 l6 u$ Q) A, @, |
testicular enlargement is not that evident in the
4 g+ k: Q0 Z4 _/ O1 i0 ybeginning of this process.1 In the absence of a neg-
$ p1 ^! _ b) P+ ?. m6 jative initial history of androgen exposure, our8 ^3 G( {- L/ ]% C
biggest concern was virilizing adrenal hyperplasia,
' I' E3 F) Y) b5 \* \7 Beither 21-hydroxylase deficiency or 11-β hydroxylase7 F% I- g+ `: y' ]
deficiency. Those diagnoses were excluded by find-
0 G D% h2 A, F0 m8 z, Y( C& `% ^ing the normal level of adrenal steroids.7 z" v6 o8 }" Z2 L9 w9 g j
The diagnosis of exogenous androgens was strongly0 Q. c; _/ ^. j3 j x
suspected in a follow-up visit after 4 months because4 G. V; f( Y: h, j3 b
the physical examination revealed the complete disap-- \/ v- c! s/ H0 g3 p9 i
pearance of pubic hair, normal growth velocity, and
7 a/ z# F& M! Z5 P7 jdecreased erections. The father admitted using a testos-
# p) E8 u1 Y3 S3 M* R/ rterone gel, which he concealed at first visit. He was; P, d% X8 d: }- m" S& k( A2 ^5 a. F
using it rather frequently, twice a day. The Physicians’/ B$ j* M! q6 B) i5 ]/ b$ g
Desk Reference, or package insert of this product, gel or
, z6 h6 U! k' |( G7 Qcream, cautions about dermal testosterone transfer to
9 B- p( E+ `3 B4 Xunprotected females through direct skin exposure.% m# |# s1 m" z: E
Serum testosterone level was found to be 2 times the5 u/ h1 U; `$ l( `) E! [
baseline value in those females who were exposed to7 a! W7 u# C0 ~# J0 Z# v6 K
even 15 minutes of direct skin contact with their male3 k4 m& R: x3 z0 v7 {1 d5 E0 p
partners.6 However, when a shirt covered the applica-
. d, s1 E4 i+ dtion site, this testosterone transfer was prevented.- x2 S& j* v# T7 x( J8 a# ^
Our patient’s testosterone level was 60 ng/mL,# g' ~( k2 z# h. f
which was clearly high. Some studies suggest that
. ?' X7 t, R. |& u- g3 L" U3 kdermal conversion of testosterone to dihydrotestos-. y2 h2 l& z7 @! R- y) g
terone, which is a more potent metabolite, is more' R+ f3 B5 _$ i2 r6 `" x7 J
active in young children exposed to testosterone
, M( y* G% d' \# {1 Z; Vexogenously7; however, we did not measure a dihy-0 J0 Z+ R% \" J e& K5 w/ y6 h& a
drotestosterone level in our patient. In addition to) B8 R2 K0 S2 B: s6 R# i. m/ @- }3 I( Q
virilization, exposure to exogenous testosterone in; M3 H+ z+ |# T5 z2 I. q! _, y
children results in an increase in growth velocity and
( V- d! T0 l1 p; W- U; X! xadvanced bone age, as seen in our patient.& i3 t2 ~3 r! Y. K1 [7 { h7 |
The long-term effect of androgen exposure during
, J- i$ c6 a. L* O7 n5 D9 fearly childhood on pubertal development and final9 ?# F5 n2 G J" J0 K- w$ ^
adult height are not fully known and always remain8 t7 U/ q2 _: Y: i
a concern. Children treated with short-term testos-! @( h, ?2 E# W5 D6 V$ H V& m' y* E
terone injection or topical androgen may exhibit some# M2 J; T9 |- n8 F
acceleration of the skeletal maturation; however, after6 }% P r- m j7 W
cessation of treatment, the rate of bone maturation
7 [, y# O) p1 R& o% edecelerates and gradually returns to normal.8,9
+ m% Q* y j0 q YThere are conflicting reports and controversy, a/ K+ |& E% _ N* X# Q
over the effect of early androgen exposure on adult
3 I7 k6 s8 F5 J3 k/ V( i5 ypenile length.10,11 Some reports suggest subnormal+ V5 N9 a& q1 M2 S0 H' M% t
adult penile length, apparently because of downreg-6 Y/ ?6 L# v" j6 i4 p# p
ulation of androgen receptor number.10,12 However,, H, f0 t( p7 B+ ~1 _2 T& W
Sutherland et al13 did not find a correlation between/ t; j- C. Y, Q% t# I, n! X
childhood testosterone exposure and reduced adult
4 O# d9 _4 \6 Dpenile length in clinical studies.
5 t0 o; d' u; oNonetheless, we do not believe our patient is
0 i& x! j- u, |6 x K0 a( p& g4 hgoing to experience any of the untoward effects from
9 H8 Q& [' |8 Y! jtestosterone exposure as mentioned earlier because. B- _9 ?# x: X( h# p2 z
the exposure was not for a prolonged period of time.
$ o5 {4 W& i2 \: V$ rAlthough the bone age was advanced at the time of
& f% w' z* I9 n [7 ^diagnosis, the child had a normal growth velocity at# Y$ i- L- W/ e
the follow-up visit. It is hoped that his final adult
6 ~+ U5 ~ O" [* O6 U' ^+ pheight will not be affected.
6 k( V1 L* ~* X! |7 @- {" WAlthough rarely reported, the widespread avail-0 R- _) @6 _- J
ability of androgen products in our society may7 O1 p' X6 Z) }% v6 u- M0 ?
indeed cause more virilization in male or female) D3 g. c- r/ N h7 ~% U; o
children than one would realize. Exposure to andro-
' J( _' W% \1 e7 N) [7 C9 lgen products must be considered and specific ques-
7 d' e' p, A+ @ H" E. Ktioning about the use of a testosterone product or
/ o3 F k4 }2 D1 z1 _gel should be asked of the family members during
' @0 t6 O# s; ]) [the evaluation of any children who present with vir-1 @; H+ O q( @" ^
ilization or peripheral precocious puberty. The diag-
' ?5 P% O/ G9 w$ P6 X* ^6 cnosis can be established by just a few tests and by0 O1 s7 q1 ?5 }' M
appropriate history. The inability to obtain such a3 H/ i2 a" Z5 K1 J
history, or failure to ask the specific questions, may
7 j4 R3 A0 A9 _2 X+ n, Mresult in extensive, unnecessary, and expensive' k% B* V2 p' ?; t
investigation. The primary care physician should be; T4 a* R6 W }/ \
aware of this fact, because most of these children
; I) s; U0 z) q2 P3 ?! E* h; x. Lmay initially present in their practice. The Physicians’& Y+ X% G* g. x1 c0 G
Desk Reference and package insert should also put a% ^- s7 i* p, R W q0 Z
warning about the virilizing effect on a male or
; h+ x/ Z/ o. I! W& h6 _female child who might come in contact with some-# k4 u" I* o+ r( L. I1 k
one using any of these products.
& [( \# @( M: q: m/ X3 n* zReferences5 H: U) c( K; B4 _9 b- S d- q
1. Styne DM. The testes: disorder of sexual differentiation
3 V2 d3 b; s) p% Q, Hand puberty in the male. In: Sperling MA, ed. Pediatric
2 z$ T8 I' r. S2 q% QEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;1 C9 z; D( D) j. o8 ^) v) v, ]
2002: 565-628.
) H5 Q8 B8 Q O8 X* Z; C9 ?2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
3 C; S( _# _2 Q. u7 `& i( `puberty in children with tumours of the suprasellar pineal
9 n/ I+ a( `7 c5 g' kat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. p5 N* _8 W* l [8 s7 t" P
Topical Testosterone Exposure / Bhowmick et al 543
, |( t7 S+ }2 S# Qareas: organic central precocious puberty. Acta Paediatr.% u6 W5 w* B. T: ]
2001;90:751-756.
3 R; |3 J: ]$ V3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.$ K$ s& u4 X3 d$ P0 F5 R
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
# l& @+ R s# _& @0 @( c* vDekker Inc; 2003:211-238.
& U( x/ g7 q+ L3 _; J1 J& M" D4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
7 ]$ K2 g- T, j; j2 `5 bdevelopment in a two-year-old boy induced by topical" N, L; b! v1 q4 f. a. v: E
exposure to testosterone. Pediatrics. 1999;104:e23.& a- c& ^7 I2 |1 N+ E$ M2 u
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of4 V7 r: o$ J) z! J0 ~4 e p3 h
Skeletal Development of the Hand and Wrist. 2nd ed.2 ~# T# z' \, y# V
Stanford, CA: Stanford University Press; 1959.* n, }. w B4 s+ t/ C& E
6. Physicians’ Desk Reference. Androgel 1% testosterone,2 V# o3 K+ G0 B# m) o
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
* D% m! H0 q) Y+ [% lEconomics Company, Inc; 2004:3239-3241.4 u7 E* K/ A9 b( n
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