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is a significant concern for physicians. Central
! }+ `$ V2 F" K' D: gprecocious puberty (CPP), which is mediated
9 v3 [6 @" W- `! J& h* e6 O; Jthrough the hypothalamic pituitary gonadal axis, has# A2 o6 b. C! b6 o3 H- F% N
a higher incidence of organic central nervous system* s2 r' h. g: ]: R7 P3 c- Z9 A
lesions in boys.1,2 Virilization in boys, as manifested
; c' @, h1 c _) {by enlargement of the penis, development of pubic @. ^6 }* [3 q/ A( T5 G6 C
hair, and facial acne without enlargement of testi-
2 O0 U3 h' a( \0 q1 F! a* `cles, suggests peripheral or pseudopuberty.1-3 We0 E9 k- I! ~$ N+ {& X$ @4 h
report a 16-month-old boy who presented with the
5 O# Z" ]7 m8 q- P: ?' \2 F& }enlargement of the phallus and pubic hair develop-4 ?2 X- A) `. }9 d: {' _
ment without testicular enlargement, which was due
. K3 H+ W! g8 J2 l, R, G( q+ zto the unintentional exposure to androgen gel used by
U2 }+ W& X9 n+ {# K6 X/ C, ^ Ithe father. The family initially concealed this infor-5 c3 j0 m1 L$ s) A
mation, resulting in an extensive work-up for this
- C$ D8 o% K# Wchild. Given the widespread and easy availability of
) o, d5 D1 X6 f6 u$ L# k- d# e" q" P# ntestosterone gel and cream, we believe this is proba-
6 r# L5 I u" N; _" T. ^) bbly more common than the rare case report in the2 \% j% G( B; p0 I! C
literature.4% B- k7 d% B+ W% a
Patient Report! m$ d2 \* W5 j5 s" B5 ]
A 16-month-old white child was referred to the+ ~/ q& ^3 B7 o# i. F8 \, p4 `
endocrine clinic by his pediatrician with the concern+ \1 V* O. z) c5 g1 K
of early sexual development. His mother noticed& Y( B+ t) }1 l- r" C
light colored pubic hair development when he was k2 z A9 x3 a5 ~& I9 E$ m0 Q
From the 1Division of Pediatric Endocrinology, 2University of7 S0 e2 o+ \2 M7 c1 L
South Alabama Medical Center, Mobile, Alabama.. y) Q* }. ?/ V+ e& V: B: V' o& g
Address correspondence to: Samar K. Bhowmick, MD, FACE,$ H, {' |% U3 ?$ r2 f
Professor of Pediatrics, University of South Alabama, College of
3 E4 F+ n/ k0 q8 p5 k& z1 i' {' hMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
" o, P" [; f( O; le-mail: [email protected].
) @6 I3 k9 F8 q: _1 nabout 6 to 7 months old, which progressively became, {4 g, `) g. `5 l5 F( A
darker. She was also concerned about the enlarge-& i' G- k% p' i: g+ T
ment of his penis and frequent erections. The child
6 k- c0 c/ o, b1 pwas the product of a full-term normal delivery, with% K8 e# n" U1 b1 g0 O
a birth weight of 7 lb 14 oz, and birth length of7 Z% a" j1 n% C
20 inches. He was breast-fed throughout the first year: a# m% [6 Z3 Z- h- O
of life and was still receiving breast milk along with
% Z4 o( l4 e! f9 I* j" r- nsolid food. He had no hospitalizations or surgery,4 ]1 K- n' a- u: O
and his psychosocial and psychomotor development1 I* t2 G& P/ P* e3 N) e
was age appropriate.
$ n: j; [2 p% ^: r6 r$ Z* @The family history was remarkable for the father,
; A5 {& n& v5 b7 y+ i% E& ^ owho was diagnosed with hypothyroidism at age 16,6 z- X& m" k) G. e, O: V) }5 s
which was treated with thyroxine. The father’s) _0 \2 V9 t7 T M; Y1 }
height was 6 feet, and he went through a somewhat
; ~# K1 K/ [8 J6 G' ] E1 p& i3 ^early puberty and had stopped growing by age 14.5 A7 c- L; e# r5 l$ w) U$ ?8 z8 c' D
The father denied taking any other medication. The
6 F+ S3 X- e5 ?: [6 `5 Hchild’s mother was in good health. Her menarche
2 D7 }: p' b" C/ O" }) m) r5 Hwas at 11 years of age, and her height was at 5 feet2 o9 R4 A% h4 b0 h. J/ p/ V) @4 v
5 inches. There was no other family history of pre-
. \% h$ N( B; t- P) Jcocious sexual development in the first-degree rela-
0 i6 K& P& [* J4 _4 b# o3 Ptives. There were no siblings.
% d7 D W ~5 APhysical Examination
; A! [3 t% }" f! y* R/ ?. RThe physical examination revealed a very active,3 @0 M" m: v9 l$ t" c
playful, and healthy boy. The vital signs documented* d3 H. A; G+ @# b9 }) q& X
a blood pressure of 85/50 mm Hg, his length was1 ^2 @8 v1 I+ d l
90 cm (>97th percentile), and his weight was 14.4 kg1 Y7 j1 J, Z5 y$ M2 n- Y
(also >97th percentile). The observed yearly growth
' l7 F4 J" U7 P( J, yvelocity was 30 cm (12 inches). The examination of. `% B. d; B* W7 I- @$ J/ c
the neck revealed no thyroid enlargement.
9 m. v# Q( U# z* a+ X3 yThe genitourinary examination was remarkable for$ c3 ~/ Q4 z( O- b; R
enlargement of the penis, with a stretched length of; k, @. Y* _) D# a* K2 G
8 cm and a width of 2 cm. The glans penis was very well9 i1 e" R/ H& I% U% n
developed. The pubic hair was Tanner II, mostly around
$ d( `/ O# e! o4 Y* u0 R; Q- i540- B T8 p( K: U! c0 R N
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
2 b# h9 W1 } x" ^# Athe base of the phallus and was dark and curled. The( v) H* x7 b3 ^5 E/ O$ d+ r
testicular volume was prepubertal at 2 mL each.
6 p3 A" Z5 Y3 \: l: d$ aThe skin was moist and smooth and somewhat1 V( p! ]! ^5 Y2 h$ B, h# R& j+ ]# n
oily. No axillary hair was noted. There were no
, Z0 T7 \& D1 {+ T: V, Nabnormal skin pigmentations or café-au-lait spots.. \/ D4 Q+ V/ P6 K8 E( V, W
Neurologic evaluation showed deep tendon reflex 2+
' L# V, n$ C3 q: ?$ O( h& _bilateral and symmetrical. There was no suggestion$ b. \/ @6 B9 n4 U2 K8 x O& ?0 p2 P# i
of papilledema.
( {3 B! L8 S& ~8 O# z5 ALaboratory Evaluation
& N1 N# h# @3 J1 b8 h$ rThe bone age was consistent with 28 months by
1 o8 j' Z( u4 }3 ~: husing the standard of Greulich and Pyle at a chrono-
. N# v* V+ P: e. G0 clogic age of 16 months (advanced).5 Chromosomal
, `& x' H5 k5 C9 G" q. H& Vkaryotype was 46XY. The thyroid function test7 C. i6 p1 Y0 a2 z
showed a free T4 of 1.69 ng/dL, and thyroid stimu-1 z5 z& a% k) W6 E/ a) j: M# g
lating hormone level was 1.3 µIU/mL (both normal).
" ^4 D) u2 \) sThe concentrations of serum electrolytes, blood8 J) b7 x" S6 P' t" x0 v
urea nitrogen, creatinine, and calcium all were# t9 G2 T7 n3 c1 d; \/ \
within normal range for his age. The concentration; ~, j! G3 T: D% F
of serum 17-hydroxyprogesterone was 16 ng/dL
3 [. E( G$ a0 [) G(normal, 3 to 90 ng/dL), androstenedione was 20% \9 ~4 V! _; B1 |
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-2 ^) t% X7 y9 U( ~
terone was 38 ng/dL (normal, 50 to 760 ng/dL), k6 P' T& R# O6 d4 k
desoxycorticosterone was 4.3 ng/dL (normal, 7 to" C: B2 N+ q1 V
49ng/dL), 11-desoxycortisol (specific compound S)
) _) i1 U; P0 x6 w+ fwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-! u& z$ m) z; `: P1 a$ Q- x5 B, `
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total. m& q5 Z' x8 X
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),4 Z) K/ V2 B6 s. i( G1 s
and β-human chorionic gonadotropin was less than
" C! v% `% R# g' [. x- b: y# }- `5 mIU/mL (normal <5 mIU/mL). Serum follicular
( B0 B3 t9 E( R$ Tstimulating hormone and leuteinizing hormone
. k1 D, j; b; t: b( qconcentrations were less than 0.05 mIU/mL
' N% O( F8 \$ y6 j& L6 b! ~9 I(prepubertal).4 }3 Y, w: f. z0 ~0 b" y
The parents were notified about the laboratory
, w& X I8 c4 y0 vresults and were informed that all of the tests were( _" v: }. q4 B% n7 d9 ^8 o
normal except the testosterone level was high. The" a- `3 f3 }( |" u2 x& w
follow-up visit was arranged within a few weeks to
- I1 i+ [4 ^) H3 z& j/ P! {9 ?obtain testicular and abdominal sonograms; how-
1 e' k0 t9 W1 Tever, the family did not return for 4 months.
5 q; V8 [% P6 j" V7 xPhysical examination at this time revealed that the
1 A6 s- C2 p: F# z7 u" g0 qchild had grown 2.5 cm in 4 months and had gained
( r, [3 h. j% D2 kg of weight. Physical examination remained
6 Z2 A) E/ D7 j7 A' N. @unchanged. Surprisingly, the pubic hair almost com-9 N: q; F0 n) c% G% N1 j. H- J6 l
pletely disappeared except for a few vellous hairs at
0 u( l2 k- R( @! W! Q' }the base of the phallus. Testicular volume was still 2; i) x, e9 ~9 r2 K* H- e ?6 g
mL, and the size of the penis remained unchanged./ F7 _% n0 b0 g4 n1 A
The mother also said that the boy was no longer hav-' ~& R4 p6 U. _
ing frequent erections.* `- s$ r# s5 i, M. U/ n! D. P
Both parents were again questioned about use of: l7 A. v9 U a( }- t7 o3 v
any ointment/creams that they may have applied to1 b3 E8 q* }1 S2 L. U
the child’s skin. This time the father admitted the
; c* Y' E7 \1 W/ }Topical Testosterone Exposure / Bhowmick et al 541/ E8 \% z4 ^6 X t+ B/ y3 `( S
use of testosterone gel twice daily that he was apply-
5 d8 q, `7 u6 A4 w5 M. G4 E9 ? iing over his own shoulders, chest, and back area for% Y, J4 Z9 P/ B
a year. The father also revealed he was embarrassed8 A" j0 K8 u8 z. M) k" _6 U$ k6 `
to disclose that he was using a testosterone gel pre-
4 q/ F2 T. T7 escribed by his family physician for decreased libido
$ N' @) n: d3 U4 g7 r4 i1 osecondary to depression.5 Y1 ]0 R, o2 T+ e
The child slept in the same bed with parents.
( b- h. Y1 c1 i6 M' o% _& ^! i& _5 vThe father would hug the baby and hold him on his
* s! X* L# T- V, n: N; Z+ Qchest for a considerable period of time, causing sig-2 X3 _: `& g' u1 e5 j
nificant bare skin contact between baby and father.
* B2 g7 L( K# e& R+ B& ]0 l aThe father also admitted that after the phone call,
! J7 Y! P. q0 H. R3 T' u1 @6 c/ Bwhen he learned the testosterone level in the baby
Y- R4 J# m% u" q$ J) r8 Awas high, he then read the product information
% x2 e3 A4 k; K9 _; |packet and concluded that it was most likely the rea-# _# A j' [) _' z9 y1 a
son for the child’s virilization. At that time, they* k, k3 P! @. `3 Y6 n0 t0 y
decided to put the baby in a separate bed, and the
0 [/ ~- V5 ]' X6 O& I2 v7 A0 _: M2 Pfather was not hugging him with bare skin and had [- @) o0 B, l: ^6 e; s3 X. b1 D1 ]
been using protective clothing. A repeat testosterone
' q g4 s; g' l; u, d/ @# ztest was ordered, but the family did not go to the& C7 h- H* e9 n
laboratory to obtain the test.
$ y* E- A* z ODiscussion
; O" j3 k2 p# ePrecocious puberty in boys is defined as secondary
7 J; q! _; _+ H9 W' J1 Nsexual development before 9 years of age.1,4
; u8 \$ T9 y' C$ A0 DPrecocious puberty is termed as central (true) when. N8 |$ ?& P- V
it is caused by the premature activation of hypo-
2 |5 @1 g3 u) [9 `thalamic pituitary gonadal axis. CPP is more com-* Z8 S; y4 Q8 g
mon in girls than in boys.1,3 Most boys with CPP
1 _) N# b( n, B( F: c; Ymay have a central nervous system lesion that is7 X# w- I( I, t# l U
responsible for the early activation of the hypothal-
, S) @1 Y4 @4 I3 ~! ~3 b& Lamic pituitary gonadal axis.1-3 Thus, greater empha-
& N1 z& D: c. P' X% A$ {0 qsis has been given to neuroradiologic imaging in
# x. \* Z/ e7 Y* \0 U8 C# [boys with precocious puberty. In addition to viril-! h {, o `; t
ization, the clinical hallmark of CPP is the symmet-
( x9 X2 f: ^' [7 Rrical testicular growth secondary to stimulation by& y2 N+ e4 p7 V
gonadotropins.1,3: j* Z. v; |( i$ c
Gonadotropin-independent peripheral preco-
. i5 F; K3 D: ^& \1 g7 ]* Xcious puberty in boys also results from inappropriate/ N5 o3 z* Z$ m6 D( j0 ~
androgenic stimulation from either endogenous or
) x3 t6 \, }, n% k m0 Cexogenous sources, nonpituitary gonadotropin stim-
@3 n) ?4 U9 G/ M1 ]7 aulation, and rare activating mutations.3 Virilizing
( }4 e# E1 T# H5 Y$ @ A" e, r/ ?congenital adrenal hyperplasia producing excessive
5 ]3 O1 G+ g6 g; { \3 L" aadrenal androgens is a common cause of precocious
, z2 {! @9 W# \puberty in boys.3,4$ Z& U+ i( B/ G; J
The most common form of congenital adrenal5 F% f9 s2 K: I/ z
hyperplasia is the 21-hydroxylase enzyme deficiency.3 p' Y2 y/ d$ `; C6 M$ ^! y2 [
The 11-β hydroxylase deficiency may also result in3 W9 ~8 ]/ H* @# [$ d9 c
excessive adrenal androgen production, and rarely,4 U# t c: l$ c! w' q, u. C7 t
an adrenal tumor may also cause adrenal androgen
! ]2 P: E0 c4 i( @# zexcess.1,3- [9 q/ Z( O3 r1 U( P4 n" C; p
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, o H0 | V& c. x2 ~. K
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
1 a8 a4 I0 N# q: p8 wA unique entity of male-limited gonadotropin-, P1 ?* C W( Y2 n& q
independent precocious puberty, which is also known: Y) n8 c$ Q( `: G
as testotoxicosis, may cause precocious puberty at a
+ j" Y: q8 u9 q9 N- Nvery young age. The physical findings in these boys/ T f; @! G) `. ^% Z S
with this disorder are full pubertal development,2 ^) L8 a2 D' U. \
including bilateral testicular growth, similar to boys, O0 e. A4 h2 D" g
with CPP. The gonadotropin levels in this disorder
3 ^4 H2 F# x/ p7 Kare suppressed to prepubertal levels and do not show
9 r9 ?+ b( K9 _/ ipubertal response of gonadotropin after gonadotropin-4 ~6 T. P# I: _3 w- s
releasing hormone stimulation. This is a sex-linked+ K8 E2 a* u8 n0 z7 ?$ x& ^
autosomal dominant disorder that affects only
! v( M. t, @ s! Fmales; therefore, other male members of the family
: s( S! E& P$ [. D+ Pmay have similar precocious puberty.3
: |# X- G4 Z% J* M" FIn our patient, physical examination was incon-
2 j# f/ O0 r( y7 t: B- s& _1 \: tsistent with true precocious puberty since his testi-& w4 T9 V& R7 D" X7 T
cles were prepubertal in size. However, testotoxicosis
[3 h2 I! J2 d& @: ~was in the differential diagnosis because his father# V, m# i Q! }' |
started puberty somewhat early, and occasionally,! y; ]7 d" [, w$ J- B1 Z
testicular enlargement is not that evident in the
5 v$ x- v; r( d6 ]0 obeginning of this process.1 In the absence of a neg-
' r6 }' s3 {3 mative initial history of androgen exposure, our# E( P% w/ W) @2 b2 h
biggest concern was virilizing adrenal hyperplasia,
3 K6 R: m3 w% y. A; ?2 \9 N, Eeither 21-hydroxylase deficiency or 11-β hydroxylase" L3 I& q0 _7 @# G) W: `- _$ q
deficiency. Those diagnoses were excluded by find-
w; g6 u. J/ K/ N [ing the normal level of adrenal steroids., z6 `$ O' M, U# L/ \
The diagnosis of exogenous androgens was strongly6 B1 D/ q8 F+ _; q
suspected in a follow-up visit after 4 months because
7 y$ f" J5 w' v( i+ W) }the physical examination revealed the complete disap-, Z `! q+ d% t6 \" p( U: g
pearance of pubic hair, normal growth velocity, and
7 x2 d+ @& O% C: \: E' qdecreased erections. The father admitted using a testos-" g" @# ^3 w; @% a, A* Q8 T' E9 Y
terone gel, which he concealed at first visit. He was
5 G0 s1 j8 ] m9 s0 w! ^& y8 h% I6 iusing it rather frequently, twice a day. The Physicians’0 d c5 R! T7 j% v
Desk Reference, or package insert of this product, gel or
# w% `! c( ? y& P# f4 ~cream, cautions about dermal testosterone transfer to. O$ e3 \7 H$ h; e" v6 |/ k C
unprotected females through direct skin exposure.
1 C& I$ U2 ]; D$ uSerum testosterone level was found to be 2 times the
- d# Z. A" Z% w- qbaseline value in those females who were exposed to0 J- ~9 Q, p4 f9 [
even 15 minutes of direct skin contact with their male+ k( ^4 c0 I% Q/ e8 M; R8 a% o
partners.6 However, when a shirt covered the applica-
4 A6 z" S* D$ Q1 Btion site, this testosterone transfer was prevented.
7 U9 c+ q* I1 VOur patient’s testosterone level was 60 ng/mL,
9 u! z l% Y2 ^6 vwhich was clearly high. Some studies suggest that8 K4 j$ Z8 S" p! D9 D2 C
dermal conversion of testosterone to dihydrotestos-
- @# ^ C7 u: }$ b: o+ Vterone, which is a more potent metabolite, is more
) B ` g3 t7 `* n1 p+ Qactive in young children exposed to testosterone
/ j) |% L6 D, ]exogenously7; however, we did not measure a dihy-& w6 O3 L+ o$ V' R- @
drotestosterone level in our patient. In addition to
. X) S1 B) Q8 O# jvirilization, exposure to exogenous testosterone in- p: T% K+ h- x9 x4 q2 W
children results in an increase in growth velocity and
# e5 ?9 j3 `6 X5 i; _& A- Zadvanced bone age, as seen in our patient., N$ Y: g# \5 T) K; u# x
The long-term effect of androgen exposure during
; Z0 o; v! W& Rearly childhood on pubertal development and final
" H# f( \/ v) J3 c- _adult height are not fully known and always remain2 V" |- M- t) B D1 V- ~! \$ D
a concern. Children treated with short-term testos-
! t3 Z4 j) l/ R( ~terone injection or topical androgen may exhibit some
1 ?+ U. z. ^ F; D1 l, l. yacceleration of the skeletal maturation; however, after2 ~9 x& q! l, K" F3 h8 x
cessation of treatment, the rate of bone maturation
2 u2 l# w& @) D1 v! _4 d' bdecelerates and gradually returns to normal.8,9
0 ~5 N# c! ^3 P1 [& b* hThere are conflicting reports and controversy
& b5 _( b/ P, C$ wover the effect of early androgen exposure on adult
0 u3 {" V0 V1 d6 W- f" fpenile length.10,11 Some reports suggest subnormal1 Z& I$ o, I6 ?8 U4 R6 P2 m) y: p
adult penile length, apparently because of downreg-
4 D' y8 i) G/ m0 W, n! bulation of androgen receptor number.10,12 However,
, c$ J' D9 U# HSutherland et al13 did not find a correlation between
% z3 j+ A* H# u' g- ?$ hchildhood testosterone exposure and reduced adult
% S: o9 y2 I- i) M, W% Openile length in clinical studies./ v6 ~4 o, d/ o/ V& @8 O& V, y+ |
Nonetheless, we do not believe our patient is3 x$ K: a. @. Q9 G9 P$ |" j
going to experience any of the untoward effects from
$ x0 |) c$ G9 a% U- s, a& P* `/ ztestosterone exposure as mentioned earlier because, E3 V1 |$ |5 I) z
the exposure was not for a prolonged period of time.
( h5 x( Y8 ]7 Y% bAlthough the bone age was advanced at the time of9 e9 B5 ]0 H& |3 F
diagnosis, the child had a normal growth velocity at: K; l6 u0 h' v, z% x
the follow-up visit. It is hoped that his final adult1 r( Y& Z% V; \$ B, L
height will not be affected.
5 ^% h5 e# W9 c+ Z! P1 IAlthough rarely reported, the widespread avail-$ h! n8 k6 Q6 s) b) G5 _
ability of androgen products in our society may
. p" f; b, J2 X7 o& r, Cindeed cause more virilization in male or female
: a* T7 b2 O0 f f) `, _9 fchildren than one would realize. Exposure to andro-0 U, w6 C+ H8 U! g* u- j3 A
gen products must be considered and specific ques-
0 P/ [ L7 V( W% Z- u& etioning about the use of a testosterone product or
3 o2 ^) a6 k$ m4 ngel should be asked of the family members during8 b: H7 n0 K$ ^% N* o5 U2 s7 d
the evaluation of any children who present with vir-
1 e% a' u( X2 ]" lilization or peripheral precocious puberty. The diag-
, Q& ^- k' N) V7 H A+ E; m5 Y3 inosis can be established by just a few tests and by
B& z4 v( G, S& y- a- }appropriate history. The inability to obtain such a! o: |- o4 L- S
history, or failure to ask the specific questions, may0 [, a p8 ~7 A
result in extensive, unnecessary, and expensive$ @! J5 M! _6 i( p' f
investigation. The primary care physician should be
* ^' n: D. t. p/ e) q' H) baware of this fact, because most of these children& z0 i/ y( `! [4 ^
may initially present in their practice. The Physicians’
, S8 _! c. k9 JDesk Reference and package insert should also put a
) [$ p" A$ [* i: g/ U( ^warning about the virilizing effect on a male or
! J" q+ c3 d( y# S5 Q7 V7 [female child who might come in contact with some-/ U4 H+ E3 |* Y$ \2 b
one using any of these products.- G5 [5 h4 l+ w9 r2 b9 B- K
References
: {# J8 G, b7 y8 D8 I% n1. Styne DM. The testes: disorder of sexual differentiation7 }5 H4 }4 U# N- f# ^1 @2 x2 V. M
and puberty in the male. In: Sperling MA, ed. Pediatric [: Z+ D* i3 e0 k Y1 |8 d
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;/ D3 j$ N$ Y7 P: J' m
2002: 565-628. G# a% j9 s3 a- ?* i' h0 v
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
6 v Z1 W9 L! a+ Opuberty in children with tumours of the suprasellar pineal
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Topical Testosterone Exposure / Bhowmick et al 543- k" }3 h' H4 v# Z* j5 f% N0 q
areas: organic central precocious puberty. Acta Paediatr.
) t& x) N. G2 i2001;90:751-756.
: y/ ?' ]. A2 v1 S @3 d3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.: g% {; }7 Y! `0 ^* ?
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
5 o v4 o5 a( E. yDekker Inc; 2003:211-238.. [7 G" Q/ I( s6 c3 l7 Z% S
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
& i) G$ C* R+ V1 ]0 Qdevelopment in a two-year-old boy induced by topical
0 Z% b, q; C/ t q0 G7 Z) Hexposure to testosterone. Pediatrics. 1999;104:e23.5 |) M* _7 ^: K6 D
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of0 E5 ]& j" e! ?. s
Skeletal Development of the Hand and Wrist. 2nd ed.* O0 e, S2 l0 A/ i; j$ R. L2 z
Stanford, CA: Stanford University Press; 1959., \4 d; Z; f, r) w. [: q
6. Physicians’ Desk Reference. Androgel 1% testosterone,
/ D' v( n( E6 `" l# L S' y6 pUnimed Pharmaceutical Inc. Montvale, NJ: Medical/ W4 O" ?9 l% a- Q, [9 |9 Z% G
Economics Company, Inc; 2004:3239-3241.) _$ F/ s; r7 |3 O0 C
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