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is a significant concern for physicians. Central
# i& h9 \' H" D# L4 _6 q- ~( }precocious puberty (CPP), which is mediated
' s! O1 c4 e2 B8 Jthrough the hypothalamic pituitary gonadal axis, has
+ {9 M- ^( o+ }4 [3 Q! h E! ?a higher incidence of organic central nervous system
+ a6 [# L; |7 clesions in boys.1,2 Virilization in boys, as manifested& p( l+ H! R+ `0 J# L0 E
by enlargement of the penis, development of pubic1 O) {* K) r, K' F
hair, and facial acne without enlargement of testi-
( O; X% V8 U6 X! M3 n: a2 B! Hcles, suggests peripheral or pseudopuberty.1-3 We1 M0 Z# X( v! @5 ?. Y, s$ E
report a 16-month-old boy who presented with the
7 v! Z! s( g" V, u; Y( G- A' aenlargement of the phallus and pubic hair develop-
, }5 i- @/ s' K( e, ^+ |ment without testicular enlargement, which was due0 q$ e% ?3 T2 B- N2 x; a5 R
to the unintentional exposure to androgen gel used by. D1 k* I c6 R g( |
the father. The family initially concealed this infor-
' v. o9 @/ O( l; a; ]mation, resulting in an extensive work-up for this
" w' V& A' c% }child. Given the widespread and easy availability of
$ ?/ u3 I0 L( _) C1 z Qtestosterone gel and cream, we believe this is proba-
2 Q) b6 W- B q. V- E- C) f% V' Ably more common than the rare case report in the
9 H: B' i: F; a. G, Yliterature.4
, \6 f1 b" {, G$ z$ G3 g% m1 FPatient Report2 f% y3 D' j7 `: K6 g Q
A 16-month-old white child was referred to the
! X3 v' s1 }' d- N) M8 @: P; zendocrine clinic by his pediatrician with the concern
3 s( X Y& H: j8 z' pof early sexual development. His mother noticed) }* E* t0 b9 } G. q
light colored pubic hair development when he was% v/ L( z6 J6 B9 J# X- [5 h7 w$ u
From the 1Division of Pediatric Endocrinology, 2University of! t* ?5 a7 ]$ e. q8 ~
South Alabama Medical Center, Mobile, Alabama.0 u/ f% W p7 X5 f- M
Address correspondence to: Samar K. Bhowmick, MD, FACE,2 V/ F9 W# O7 s2 \6 d3 B2 }5 ^% j
Professor of Pediatrics, University of South Alabama, College of
) `: I8 z: p- ~Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
m% q) Z7 F$ b' b7 } ae-mail: [email protected]." m6 M: ~+ y5 N
about 6 to 7 months old, which progressively became
4 I# M- |4 l9 ndarker. She was also concerned about the enlarge-
& b; l+ |, V8 K' j3 \# wment of his penis and frequent erections. The child. I2 o. S$ g* _7 E( g1 v
was the product of a full-term normal delivery, with
; S( p7 t' D9 U( l) v# ]* r3 {6 Ma birth weight of 7 lb 14 oz, and birth length of
& y# \$ B/ T% {. B# s0 [0 {( [20 inches. He was breast-fed throughout the first year
- ?5 V0 E! A+ i5 G8 A& k% Xof life and was still receiving breast milk along with
1 m% s# P; M' d4 fsolid food. He had no hospitalizations or surgery,: P& D! f/ h% l: m* [
and his psychosocial and psychomotor development
5 o5 I( t/ h/ T. T( c' }was age appropriate.
Y5 p% m- w9 U1 E4 F9 d6 D$ uThe family history was remarkable for the father,
' P v, b# }2 w' t$ ]who was diagnosed with hypothyroidism at age 16,
7 W t7 E. o+ H5 W; H# Hwhich was treated with thyroxine. The father’s8 K- ~7 O6 u! S1 {
height was 6 feet, and he went through a somewhat' s0 G, C" C0 r' a" q+ U# y
early puberty and had stopped growing by age 14.
* X( \1 w5 d+ P3 x) I, rThe father denied taking any other medication. The
# T) F6 R* }1 G' v( K0 r3 |: I4 L0 bchild’s mother was in good health. Her menarche
2 w; U: F! y' Ewas at 11 years of age, and her height was at 5 feet7 F9 Y# R5 l" N; Y9 n
5 inches. There was no other family history of pre-' L+ {7 q- Z; f' C4 O/ B
cocious sexual development in the first-degree rela-
6 i; z( n' C* F) ~) Etives. There were no siblings.
9 B: Y/ K0 b6 P. y" NPhysical Examination
! s( G$ y+ k) r" F! L0 {+ t8 m+ `- PThe physical examination revealed a very active,
$ j: M- j) v! v- z1 wplayful, and healthy boy. The vital signs documented5 Q$ Y! T. H( h
a blood pressure of 85/50 mm Hg, his length was M7 A- ?* m1 N% H+ _$ b6 S) m
90 cm (>97th percentile), and his weight was 14.4 kg
6 h+ ]1 F* U+ Z! g! ^(also >97th percentile). The observed yearly growth& I' { I# T) ]
velocity was 30 cm (12 inches). The examination of
5 ?9 M7 q5 E& G1 b0 @& Nthe neck revealed no thyroid enlargement./ ^3 M: ]% j* F t9 v& j
The genitourinary examination was remarkable for- T' Y8 ]6 |, E" D d
enlargement of the penis, with a stretched length of
( O2 \6 M1 z. F. B: ` Y8 cm and a width of 2 cm. The glans penis was very well
$ [+ G) x0 `) ~9 X+ n' o3 c- A1 wdeveloped. The pubic hair was Tanner II, mostly around
1 C' Q1 ?; @- t( p) Z/ ~/ ?540
9 t- j: W2 ~5 @ h. E) A# }at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
; h0 s' i$ r$ j# [# [5 kthe base of the phallus and was dark and curled. The
* {4 u* H; J x* R- N' Z9 j% ptesticular volume was prepubertal at 2 mL each.: O' f7 V* z1 @4 ^" `8 |) a1 B) B
The skin was moist and smooth and somewhat/ k. s: v; j) T n: r3 J7 |
oily. No axillary hair was noted. There were no# [; m5 B+ \; j7 Z, Y8 W6 [
abnormal skin pigmentations or café-au-lait spots.( N, n0 \ ~! i4 ~! c" |
Neurologic evaluation showed deep tendon reflex 2+
3 @% |; R9 B8 V) l; ?. Nbilateral and symmetrical. There was no suggestion1 q; s& t0 E; q/ F4 R" O1 T
of papilledema.
k$ O, F. I: T; ]: @, F0 C1 H; zLaboratory Evaluation
0 F+ E/ c% f. t" w. f1 P2 }The bone age was consistent with 28 months by
' U9 i3 x' |* Dusing the standard of Greulich and Pyle at a chrono-2 z8 d; e% Q: M" o- e; | I
logic age of 16 months (advanced).5 Chromosomal
6 @7 G/ d- x5 Q) R- }6 J: hkaryotype was 46XY. The thyroid function test
; F6 y8 |. @" S7 `3 H xshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
- Q4 G$ T& ]; E* O; q Ulating hormone level was 1.3 µIU/mL (both normal).- `$ K: H. D# E4 m6 W2 _
The concentrations of serum electrolytes, blood, e0 a& d0 i# d5 O3 d/ l* X+ Z( R
urea nitrogen, creatinine, and calcium all were h5 ?1 X( s' b$ n
within normal range for his age. The concentration
; M6 c3 U- J/ N7 q; S- s Xof serum 17-hydroxyprogesterone was 16 ng/dL
4 {& T2 D5 p6 F6 s8 C5 n0 O- f(normal, 3 to 90 ng/dL), androstenedione was 20
% s6 Y: |$ L& r) ] g8 b. `% c2 Bng/dL (normal, 18 to 80 ng/dL), dehydroepiandros- X5 T7 L) s% H' }! g* _
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
' Z' O' d3 S8 m8 r) N1 F2 a. m8 mdesoxycorticosterone was 4.3 ng/dL (normal, 7 to% S# R5 j/ O" _- A* Z7 P# o
49ng/dL), 11-desoxycortisol (specific compound S)
z- B$ T' O h. u" [4 |was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
) |7 {/ C5 H( k5 t/ c! btisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
) ?. Z7 @3 G: @: X, gtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),# E8 g ]. w1 X& e/ c; G4 i }
and β-human chorionic gonadotropin was less than% D$ l. `0 k: m0 p5 q: P
5 mIU/mL (normal <5 mIU/mL). Serum follicular# N' U; V% N& m
stimulating hormone and leuteinizing hormone
2 N5 b6 N( o: W" B- ]4 [concentrations were less than 0.05 mIU/mL" p/ V" W& { W3 P
(prepubertal).0 L) I+ C4 Z5 s2 n' G. P
The parents were notified about the laboratory; F+ Q& h) s; R/ _% J% a
results and were informed that all of the tests were- i. h5 |6 X# ^' g% U5 ~- h
normal except the testosterone level was high. The
* \# p3 V1 b! f5 \. ]+ r* ^follow-up visit was arranged within a few weeks to
4 e% q$ t: j, m+ H5 b* Vobtain testicular and abdominal sonograms; how-
9 D/ z, x: Y3 _; e8 _1 w* mever, the family did not return for 4 months.
3 h1 l5 r3 w# D7 [7 U5 YPhysical examination at this time revealed that the9 S, \7 H5 h; P7 T( _% V
child had grown 2.5 cm in 4 months and had gained
% d. [; y8 G- d, i( j% L" E2 kg of weight. Physical examination remained
: f+ w" V0 c9 m) j( Uunchanged. Surprisingly, the pubic hair almost com-, o4 \* d2 o3 H2 x+ c; t- |5 L
pletely disappeared except for a few vellous hairs at9 r' w# n# a4 S; w# V2 w/ L# ]
the base of the phallus. Testicular volume was still 2
; ^' o" ?, x% E$ imL, and the size of the penis remained unchanged.2 q6 j' J6 V, r+ B1 Q" ~
The mother also said that the boy was no longer hav-2 U* o3 U3 G/ I. \6 `& c$ x' M3 Y( I
ing frequent erections.& x' j7 {$ v/ W* y* A
Both parents were again questioned about use of. w; B5 Q `: Y5 K
any ointment/creams that they may have applied to
; U' F5 [7 x5 d; {the child’s skin. This time the father admitted the
$ q7 M. l3 z: C7 \- XTopical Testosterone Exposure / Bhowmick et al 541
/ F, X1 z( M" K0 juse of testosterone gel twice daily that he was apply-
" c4 `, P8 f) X5 D8 wing over his own shoulders, chest, and back area for( I0 ^! F5 m; R2 @+ Y; Z% q
a year. The father also revealed he was embarrassed" T0 P1 f+ _' a, I& E
to disclose that he was using a testosterone gel pre-
8 {# |( v* ~% H( o" cscribed by his family physician for decreased libido
! C! k! N) G( X0 a5 g) C5 fsecondary to depression.
9 B* D2 {' r, u1 n# P. p+ yThe child slept in the same bed with parents.
- \) Y5 Q* W, }) }# TThe father would hug the baby and hold him on his
) d% M( N" H j' n$ t" E" Zchest for a considerable period of time, causing sig-
/ e7 w% } q7 G8 Dnificant bare skin contact between baby and father.+ l) y/ M0 V/ H" A( M, Q1 ~5 L
The father also admitted that after the phone call,
' W9 E g! n+ u" H; B1 swhen he learned the testosterone level in the baby
+ T+ Y. K5 Q2 o6 Ewas high, he then read the product information) y" D. C1 X# @1 _; \
packet and concluded that it was most likely the rea-4 k& V5 X+ T* ~& t# `9 Y& c; W8 j
son for the child’s virilization. At that time, they
: z/ D$ h- M Odecided to put the baby in a separate bed, and the
" ~4 ?/ Q Q( M" t. G( U# }father was not hugging him with bare skin and had6 M2 ^$ b" u* N6 N7 v4 h9 g1 Z Y
been using protective clothing. A repeat testosterone) [, C$ [ _* V' a
test was ordered, but the family did not go to the6 u& c0 s* i! F1 q- Y% m' A( V4 H: I
laboratory to obtain the test.
% x# j9 A2 ? C4 ]! ^( V" BDiscussion' }5 m7 f2 p+ \1 r
Precocious puberty in boys is defined as secondary
3 I: @! m }/ bsexual development before 9 years of age.1,4+ W1 G& J7 s) G# K
Precocious puberty is termed as central (true) when& ]* V% K2 L( y; |( p) f6 _! o
it is caused by the premature activation of hypo-+ w4 E: J$ {+ }$ `
thalamic pituitary gonadal axis. CPP is more com-3 q, y9 S. E. C0 n& V
mon in girls than in boys.1,3 Most boys with CPP
3 a* T$ K# y! A2 r) F% umay have a central nervous system lesion that is
9 r" {! }. _9 I( zresponsible for the early activation of the hypothal-
* [) V7 q) k1 p7 kamic pituitary gonadal axis.1-3 Thus, greater empha-* z% |. L! ?. k- u
sis has been given to neuroradiologic imaging in
* o/ s# f# {4 s2 l; J J7 v9 Pboys with precocious puberty. In addition to viril-
6 G# @0 c9 O6 c) ]* q ?ization, the clinical hallmark of CPP is the symmet-* ]7 E# e+ U" ~1 X/ p- }3 {7 ]$ U
rical testicular growth secondary to stimulation by
9 i( O8 V# s! L: ?0 R5 S& egonadotropins.1,32 S& N ~! Y3 Y; N! b
Gonadotropin-independent peripheral preco-5 V/ T) K+ S/ T) X( E' {1 e1 B
cious puberty in boys also results from inappropriate6 D3 `* f" v5 K, H U0 @
androgenic stimulation from either endogenous or
, i0 Z* B" p) B% ]exogenous sources, nonpituitary gonadotropin stim- [% O* v; n( m. X# J; b
ulation, and rare activating mutations.3 Virilizing
- E8 [+ h8 \0 ?0 }congenital adrenal hyperplasia producing excessive
/ N& \4 m" i' fadrenal androgens is a common cause of precocious) g8 [7 B9 R1 j0 H
puberty in boys.3,4
, D" S7 w' [$ e; T }The most common form of congenital adrenal
/ m+ a" b0 J' ^& lhyperplasia is the 21-hydroxylase enzyme deficiency.
2 b7 ^. i; H5 Y* S9 Z9 q( mThe 11-β hydroxylase deficiency may also result in" L" r2 n5 ?9 y$ t) B
excessive adrenal androgen production, and rarely,
& ]6 ~% h2 D S5 E( g1 ?0 x0 A: Lan adrenal tumor may also cause adrenal androgen0 `- |3 d" M9 e- ]; o5 ?
excess.1,3; z/ h* c1 V0 J1 V& g u1 S. X: ^
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
# y0 V7 p0 K+ [% |542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
5 G! t" Y8 b$ e5 B/ M8 v7 n7 ?A unique entity of male-limited gonadotropin-4 e" A: P1 x* }9 v
independent precocious puberty, which is also known8 G- T7 n v: l) b
as testotoxicosis, may cause precocious puberty at a$ }% X) N* d# {' n# @' A5 ^! O
very young age. The physical findings in these boys+ ~$ n6 `: m6 D$ \! ^9 A' h. ~
with this disorder are full pubertal development,
6 ]% U9 S9 Z0 |; e; H6 c& uincluding bilateral testicular growth, similar to boys
6 o2 @' R1 e) I; P% i0 }6 m+ Twith CPP. The gonadotropin levels in this disorder
/ z% ^/ H/ o9 E# Dare suppressed to prepubertal levels and do not show' E: C: u1 m( Z3 U i: M# N' i5 w1 N
pubertal response of gonadotropin after gonadotropin-
4 d9 i" \) m( e; Dreleasing hormone stimulation. This is a sex-linked4 H f; A% i$ \; a
autosomal dominant disorder that affects only4 q) S/ M% u* E* ~" J: |
males; therefore, other male members of the family
; S q. s4 i6 ]: w4 Z% `may have similar precocious puberty.3 j/ v# t) C4 Y4 x( C7 V. _8 H+ {
In our patient, physical examination was incon-) @% W- V. O3 b# P+ A
sistent with true precocious puberty since his testi-
5 a" a% t2 a* S# E6 p, t! lcles were prepubertal in size. However, testotoxicosis0 c) M0 ?. d# K; J8 u q* B$ H9 c
was in the differential diagnosis because his father; q' V, l- o% S' q6 m& G( u4 B: E
started puberty somewhat early, and occasionally,; [; e: [$ d# f+ c5 |( s2 `
testicular enlargement is not that evident in the
/ }& M& U4 |% f2 kbeginning of this process.1 In the absence of a neg-. `+ {, D# n0 I" ~
ative initial history of androgen exposure, our
9 F8 p: b; n0 m9 Dbiggest concern was virilizing adrenal hyperplasia,! w! R% {4 {1 U/ {6 x
either 21-hydroxylase deficiency or 11-β hydroxylase
3 t, ~! @$ F; B: F3 J4 `deficiency. Those diagnoses were excluded by find- k8 K' x o8 t* K0 f9 R0 i* N K
ing the normal level of adrenal steroids.. [8 ]: \; l( B2 r* Z. f4 a
The diagnosis of exogenous androgens was strongly
; X. g8 X3 E+ n+ Ysuspected in a follow-up visit after 4 months because
) C8 K8 H/ U) }6 M$ \# l2 Ythe physical examination revealed the complete disap-, J+ l, m6 D" }; B+ r
pearance of pubic hair, normal growth velocity, and
8 |# s: H6 }: I. b+ g' Ydecreased erections. The father admitted using a testos-5 k4 l' l/ ^6 c7 `! I
terone gel, which he concealed at first visit. He was
0 C& d, o" l. A- O4 ~ Busing it rather frequently, twice a day. The Physicians’8 @1 x8 t. C! \! _# N
Desk Reference, or package insert of this product, gel or
! A6 H( e8 n8 Q% w% f2 icream, cautions about dermal testosterone transfer to" a, W- B) x$ s' |1 r
unprotected females through direct skin exposure.% d3 \& v( s+ O
Serum testosterone level was found to be 2 times the: O/ F; t; U# l3 O, \/ `
baseline value in those females who were exposed to) i+ P: N0 `0 K. J2 x
even 15 minutes of direct skin contact with their male! c8 E# c% B& ?- B
partners.6 However, when a shirt covered the applica-
: @2 y0 v' z$ g7 f. g# a) `6 ntion site, this testosterone transfer was prevented.
5 V1 r# J7 w1 | M% p7 wOur patient’s testosterone level was 60 ng/mL,
# ^9 h5 v$ i, k; Q r+ K0 V/ Uwhich was clearly high. Some studies suggest that
! X1 v) t. v5 m4 T" qdermal conversion of testosterone to dihydrotestos-( F3 c" R- G2 x2 A- i
terone, which is a more potent metabolite, is more
# R1 H7 x9 j) Y( i2 p, Uactive in young children exposed to testosterone
0 C1 F0 V6 \0 ~+ X( W- W% r' e: @exogenously7; however, we did not measure a dihy-/ e/ ~7 q4 j4 i; Y( K! o+ ^
drotestosterone level in our patient. In addition to. z8 c6 {2 s: Z, L% O. b
virilization, exposure to exogenous testosterone in9 V% S% m9 @/ V
children results in an increase in growth velocity and2 S6 X( v1 m% P0 ]9 d2 R
advanced bone age, as seen in our patient.% p. C7 Q4 I+ N& U' b, c
The long-term effect of androgen exposure during, T. @% f/ X7 y7 a6 [7 k! D# _4 V
early childhood on pubertal development and final8 G" M& Q x0 r: e" u0 G, I
adult height are not fully known and always remain
; t3 Z m+ J; R2 R8 a" wa concern. Children treated with short-term testos-
) L3 m4 R# w/ Y( c/ |terone injection or topical androgen may exhibit some" o7 S: n) x" t' t% K+ }
acceleration of the skeletal maturation; however, after8 R5 i9 c! ^# p
cessation of treatment, the rate of bone maturation
0 t6 m. l! P n' hdecelerates and gradually returns to normal.8,99 u; }( A/ R* b/ G$ L0 o
There are conflicting reports and controversy
( W8 M' O% |! s5 W7 q. wover the effect of early androgen exposure on adult
" P: Z( M- k) t' M {" c9 zpenile length.10,11 Some reports suggest subnormal7 I8 ?. k: ^( I Z
adult penile length, apparently because of downreg-
! d' n" k7 O/ Q; Fulation of androgen receptor number.10,12 However,. d8 F, Z8 Q5 v) s
Sutherland et al13 did not find a correlation between' h1 I. v# ?: b6 b+ g P
childhood testosterone exposure and reduced adult+ n4 V4 t1 M' J9 j, ~
penile length in clinical studies.
7 M6 m5 L* j0 u! ]9 hNonetheless, we do not believe our patient is9 @4 n2 x, P, q/ \0 Y: R
going to experience any of the untoward effects from* F K+ t' g6 S; e: B& ]! {+ q
testosterone exposure as mentioned earlier because, K# ]2 [0 @! F
the exposure was not for a prolonged period of time.$ W" S& V( P1 u( i- }' S' a: T4 ~
Although the bone age was advanced at the time of) B# V# f5 m( N* W( }3 O) ~' P
diagnosis, the child had a normal growth velocity at) J9 i) g) s! G
the follow-up visit. It is hoped that his final adult
# m1 e3 P& g: t) C* J7 Xheight will not be affected.. B4 M' E8 O) e; x! I5 q5 o U% I; C
Although rarely reported, the widespread avail-8 ~/ b0 `, {$ X* K, T
ability of androgen products in our society may
8 R7 J2 S( x" A8 oindeed cause more virilization in male or female! Z0 h/ g- U6 V, u
children than one would realize. Exposure to andro-
; x. S2 q- H' n8 u% C: o. _gen products must be considered and specific ques-
3 y9 \1 ~. a/ O3 V( |" ?( }tioning about the use of a testosterone product or3 ^* @ j/ g( `/ f4 a0 q2 ]
gel should be asked of the family members during
; T9 x$ D( ~: ]5 y% d" Xthe evaluation of any children who present with vir-
5 k% x1 w6 A, N* S" B" i0 cilization or peripheral precocious puberty. The diag-7 E. P( {: A0 c |# x% b# ?4 X; p
nosis can be established by just a few tests and by7 T/ Y8 t% N+ u& z
appropriate history. The inability to obtain such a
! k4 a0 W5 I) U5 I0 T9 j: lhistory, or failure to ask the specific questions, may
" A' N2 d c5 _8 g9 Qresult in extensive, unnecessary, and expensive9 H* o) @4 }& M/ m, @! x, K# N
investigation. The primary care physician should be/ O! x1 X+ Z9 w* o% F" F
aware of this fact, because most of these children% _1 [$ a& i; ~" `/ s; z
may initially present in their practice. The Physicians’
3 ]2 I) r& O# FDesk Reference and package insert should also put a' A+ @( F3 V. I
warning about the virilizing effect on a male or- S( v4 b) A( n: _% [9 z
female child who might come in contact with some-
4 N5 r; C' u8 r0 R5 `one using any of these products.( I+ x. t! n5 G# U# @1 f
References- V5 v( I' x; t; l
1. Styne DM. The testes: disorder of sexual differentiation
3 M+ P' ~" V/ u- l; d6 land puberty in the male. In: Sperling MA, ed. Pediatric
- o4 N6 y5 Y l8 W; E e% ^# Y* FEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;6 `9 l; U" k( \5 C
2002: 565-628.3 E& m) i- ]7 A* J5 x# A
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious7 f0 Z) J# u. F Y# G3 i
puberty in children with tumours of the suprasellar pineal/ k1 p% q! r6 Y1 O
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* O0 p! M$ m- M! F
Topical Testosterone Exposure / Bhowmick et al 543' W) S$ P% e* p
areas: organic central precocious puberty. Acta Paediatr.: _" l% A" k0 z+ ^5 h% D# z! F/ P
2001;90:751-756./ E" \- Z& J1 u9 j! O5 O
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
8 X2 S$ z! v# V. [Pediatric Endocrinology. 4th ed. New York, NY: Marcel; a, b$ v( `6 h$ V+ O0 u3 L& r
Dekker Inc; 2003:211-238." [8 [, \7 F" u% D! K
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual! h4 V' s0 }+ Q1 `
development in a two-year-old boy induced by topical" |; Y7 [2 ~) f' c# p2 j# o
exposure to testosterone. Pediatrics. 1999;104:e23.
4 K+ q) n2 H& V6 |; f, a5. Greulich WW, Pyle SI, eds. Radiographic Atlas of i% ]- ~, k) F9 E6 O0 S) }
Skeletal Development of the Hand and Wrist. 2nd ed.
' @! Q0 ~: @! J: EStanford, CA: Stanford University Press; 1959.2 V/ {$ S; G8 q& ]9 a- G
6. Physicians’ Desk Reference. Androgel 1% testosterone,. c( @" F( q$ A0 n4 j' m
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