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is a significant concern for physicians. Central
& O4 u/ y9 j7 e" a/ Q# Zprecocious puberty (CPP), which is mediated( l: {) M0 c& w3 D" e5 \
through the hypothalamic pituitary gonadal axis, has) I) [9 X" _6 C1 D$ E
a higher incidence of organic central nervous system
, p2 r- k1 I! {. j, j. U2 T! |5 [lesions in boys.1,2 Virilization in boys, as manifested5 b' p; f% M+ A+ j; L0 n( _0 P
by enlargement of the penis, development of pubic
% P5 D. ~, Y( q3 L! u; Whair, and facial acne without enlargement of testi-9 `1 n" }$ |" d& c
cles, suggests peripheral or pseudopuberty.1-3 We
! g$ q( z8 e! p9 V0 nreport a 16-month-old boy who presented with the& T( o+ @& q2 ~, r7 E0 B
enlargement of the phallus and pubic hair develop-* `: s; Z) O1 { q1 Z* g
ment without testicular enlargement, which was due
# U" U* ?. N$ `. Q/ ito the unintentional exposure to androgen gel used by( e8 C; H3 i2 Z- z) J8 c0 C# m4 n0 z
the father. The family initially concealed this infor- x7 v* n# @: W( w7 F9 f) v
mation, resulting in an extensive work-up for this
* B. F! J; c6 _! L( ?child. Given the widespread and easy availability of# c! z- \8 H; C" r9 P$ Q D7 _* o
testosterone gel and cream, we believe this is proba-
; k2 ?5 [( A8 G Q! Kbly more common than the rare case report in the. W2 G. w; b5 r$ T$ \
literature.4$ ^4 B) x3 l3 c$ }/ m
Patient Report. A* B$ f+ x6 i5 x0 H
A 16-month-old white child was referred to the
; f/ _. n$ {% d& gendocrine clinic by his pediatrician with the concern4 w+ _; K" A; H- R. L4 Q
of early sexual development. His mother noticed
6 u% D/ m# D+ alight colored pubic hair development when he was& G4 R; |/ a1 y0 m4 i' i
From the 1Division of Pediatric Endocrinology, 2University of
, D9 ^4 [2 c& G% A! n$ _( v2 xSouth Alabama Medical Center, Mobile, Alabama.
4 J+ g6 d$ ?% E& Q- RAddress correspondence to: Samar K. Bhowmick, MD, FACE,3 c( @: Q/ Q3 t6 I" ]
Professor of Pediatrics, University of South Alabama, College of: d6 i0 w2 w2 p* W$ M
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297; y6 m: ~; d- q* l5 o
e-mail: [email protected].
6 j" d- R2 K5 w& V8 h8 d- Labout 6 to 7 months old, which progressively became$ `0 I" w' \. ]
darker. She was also concerned about the enlarge-
2 r2 w5 C1 p1 T' Bment of his penis and frequent erections. The child' }0 N) x8 g/ W' A/ l- G
was the product of a full-term normal delivery, with
! R9 k7 A t1 p+ Q. `% u0 U9 Za birth weight of 7 lb 14 oz, and birth length of
; P( x/ k# M. d5 V20 inches. He was breast-fed throughout the first year
6 t& T$ v' j" {) a! ^- r! \& u8 [of life and was still receiving breast milk along with
, p' W* L7 Y$ l' e7 ~3 z0 _; tsolid food. He had no hospitalizations or surgery,7 p$ M, O1 c- l7 J3 f7 }7 d
and his psychosocial and psychomotor development
Y8 f* b# Y6 I, r& B) c! Bwas age appropriate.: i7 Q$ e/ v) k5 O- E S% W
The family history was remarkable for the father,
& C9 l& U& r( t( ^& l; Owho was diagnosed with hypothyroidism at age 16,
! X; D% {3 E9 p- Z. a- Vwhich was treated with thyroxine. The father’s
% k# U9 @4 [, Q5 }height was 6 feet, and he went through a somewhat
) f& m+ G# V/ D4 E' Zearly puberty and had stopped growing by age 14.$ q; b; F: p. |0 i( u! o% P5 H% x
The father denied taking any other medication. The7 J$ d. z2 b. D' r1 a3 a: R
child’s mother was in good health. Her menarche" ^, ~6 j; y5 i! k
was at 11 years of age, and her height was at 5 feet4 s9 h7 M Y& M' w
5 inches. There was no other family history of pre-, n. o3 W, o5 R- X
cocious sexual development in the first-degree rela-
3 z" z! |# i1 ^tives. There were no siblings.* X8 F; k% V5 r# n7 u) i! |8 j. c
Physical Examination
5 w/ c; U0 k' a8 X" xThe physical examination revealed a very active,
, h3 B! J& Q( Z% fplayful, and healthy boy. The vital signs documented: g7 C7 w1 d* B$ l2 ]" I4 X& v
a blood pressure of 85/50 mm Hg, his length was
/ v- b4 i* E) C m$ p/ O+ g# V& F90 cm (>97th percentile), and his weight was 14.4 kg
; l% f$ W- M4 A/ [6 ]0 c(also >97th percentile). The observed yearly growth; D* a) }5 _2 t4 s% \- X( N- ^
velocity was 30 cm (12 inches). The examination of
& b& C: E) ]8 t4 ~# ?; s2 _the neck revealed no thyroid enlargement.! u5 ]" L1 t9 l3 O6 Q
The genitourinary examination was remarkable for! U0 I: L {. R# J) P6 p, ?
enlargement of the penis, with a stretched length of
& T& C7 F0 @4 V: G5 n7 F! _; x8 cm and a width of 2 cm. The glans penis was very well
3 y- M& @9 g( \developed. The pubic hair was Tanner II, mostly around7 `# e0 j4 v F4 o1 |% \3 ]2 h
5401 _3 ~6 }( a7 l/ u
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* w& N X- P( Y8 s. g
the base of the phallus and was dark and curled. The
% a5 `* H. j7 _$ E6 ?+ ztesticular volume was prepubertal at 2 mL each.
7 q I, u$ j! ?! h0 m2 I! a( zThe skin was moist and smooth and somewhat- ?& U) b2 b( u( u$ V y3 e' D! J
oily. No axillary hair was noted. There were no
$ D+ q4 k2 m" @. v' q C Cabnormal skin pigmentations or café-au-lait spots.
( i8 P* M: v' J5 _% ^& y' D, m* BNeurologic evaluation showed deep tendon reflex 2+
/ }. d3 T m0 |1 ~$ g3 ubilateral and symmetrical. There was no suggestion
5 [ h2 v7 L0 Rof papilledema.1 O/ g* T' ]( t8 k; q' q+ s
Laboratory Evaluation
. N! n- t# x1 F: g! k6 ~! K* TThe bone age was consistent with 28 months by2 l6 v/ K& n8 ^, N/ _: q( N- E
using the standard of Greulich and Pyle at a chrono-
0 D' F& v( C% ~ x/ W) Z! plogic age of 16 months (advanced).5 Chromosomal) w- y/ ^/ J/ I) P0 q
karyotype was 46XY. The thyroid function test4 I4 l, y* G! [" L0 D' t' ]: Y
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
3 ~8 Q, L4 |" w# W$ a! ilating hormone level was 1.3 µIU/mL (both normal)., f2 j# O9 ~* l6 S
The concentrations of serum electrolytes, blood& @5 x) Y3 ] r+ p; h3 J$ @; w
urea nitrogen, creatinine, and calcium all were0 Q: O4 H q6 b4 H( j$ i- M
within normal range for his age. The concentration7 s" F- }5 }& M' H
of serum 17-hydroxyprogesterone was 16 ng/dL
0 U8 E/ A: ~: T6 h% h- _- u ~$ e(normal, 3 to 90 ng/dL), androstenedione was 20! ~2 P# h9 x4 k! x
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
* _6 y p" ^) p, J: h) Tterone was 38 ng/dL (normal, 50 to 760 ng/dL),
: u! _ Q: V) f! tdesoxycorticosterone was 4.3 ng/dL (normal, 7 to6 ]* _; P- @$ K; \
49ng/dL), 11-desoxycortisol (specific compound S)' M# ?( x. ^. g) I% J! n) ^
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
3 B' ?; o/ G- ]$ \! _8 q* Btisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
; A0 @: O/ k3 p8 |( h% |testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
! S$ O9 y8 b C! b; R; Oand β-human chorionic gonadotropin was less than1 H# c. ]6 Y4 E0 f
5 mIU/mL (normal <5 mIU/mL). Serum follicular' Q$ b0 ^8 Q6 r' B1 H
stimulating hormone and leuteinizing hormone
$ j' h8 @* g! }' m# A( S+ mconcentrations were less than 0.05 mIU/mL+ R2 j+ Z1 b# A5 S
(prepubertal). @2 C, F" l: p' M* O
The parents were notified about the laboratory
2 A( y# H/ Z; kresults and were informed that all of the tests were; G4 ]/ f' m5 J7 }, n& H
normal except the testosterone level was high. The3 N3 [5 k4 _- d' P3 o) b) ^
follow-up visit was arranged within a few weeks to
- D% z- N5 s. Q. y; E/ H* n, Kobtain testicular and abdominal sonograms; how-
( t* k' U; e8 q7 U% zever, the family did not return for 4 months.
+ \) @7 N/ s! K- QPhysical examination at this time revealed that the1 d3 T, V' I7 h# H+ n. I
child had grown 2.5 cm in 4 months and had gained
, \7 Z4 G, P5 [2 kg of weight. Physical examination remained
& ~1 t: p0 G2 munchanged. Surprisingly, the pubic hair almost com-
( o; I6 R# ?: Wpletely disappeared except for a few vellous hairs at
* _+ K7 Y4 `3 F" cthe base of the phallus. Testicular volume was still 2
2 _$ j( f$ V3 z2 O5 fmL, and the size of the penis remained unchanged.- i. ]" f4 _/ t0 \! Z
The mother also said that the boy was no longer hav-1 C# m9 a( U+ Y7 P
ing frequent erections.
. k5 e0 m- Q& ZBoth parents were again questioned about use of7 X* m2 j+ W8 C; `' ^1 M! d1 J
any ointment/creams that they may have applied to4 P7 r% M+ ]9 C6 C E7 g( Y% e$ X
the child’s skin. This time the father admitted the
- n+ A) `6 \2 s) n/ T: H1 hTopical Testosterone Exposure / Bhowmick et al 541
" ^2 w s# m6 ?$ {' Kuse of testosterone gel twice daily that he was apply-: U# H, X4 ?/ n- y' v8 o" z
ing over his own shoulders, chest, and back area for
9 L, y7 n( Q* A/ l1 G: wa year. The father also revealed he was embarrassed$ V1 \2 N5 k; X; E# f( }" U& d
to disclose that he was using a testosterone gel pre-* h! x6 D# T% D* }
scribed by his family physician for decreased libido
# c, V. q6 @$ w* E. ?& B( asecondary to depression.
7 O4 Q4 s) S1 O' a$ GThe child slept in the same bed with parents." G. v* _; b- K5 |0 U5 D
The father would hug the baby and hold him on his
, u4 J; R" _2 @0 ^1 C$ f4 @! [5 tchest for a considerable period of time, causing sig-
/ A$ ~' J1 N6 n3 i4 z' Rnificant bare skin contact between baby and father.
$ s8 U; U4 ]2 ?7 }The father also admitted that after the phone call,
$ t. w3 Y i: a" s$ `when he learned the testosterone level in the baby
6 l7 ~$ O l. X. Cwas high, he then read the product information- V# ?- O1 I* V% Z2 `# ?) u
packet and concluded that it was most likely the rea-
: c% e* z( {9 [# z3 T) M) Fson for the child’s virilization. At that time, they$ _4 r# a# A! W. p
decided to put the baby in a separate bed, and the
) q8 J4 F( }1 O$ L& o5 yfather was not hugging him with bare skin and had2 C# g Y) ^7 I
been using protective clothing. A repeat testosterone
" E* U& Z" f2 u4 G9 b' xtest was ordered, but the family did not go to the
; E5 R) T( r1 Z5 k& olaboratory to obtain the test.
& w; K0 x( Z* ^) v6 M$ k# ?' d4 dDiscussion
( m4 ^$ y' m9 k @7 |6 LPrecocious puberty in boys is defined as secondary
8 E5 T' D6 ]! {9 ^sexual development before 9 years of age.1,4' i/ z% a+ L: \0 S1 `, Y
Precocious puberty is termed as central (true) when0 z9 q& g3 M9 x# P; a
it is caused by the premature activation of hypo-
3 i5 Z9 D2 D3 @9 Z8 F1 Nthalamic pituitary gonadal axis. CPP is more com-
, K. I8 n# Z* x- ]mon in girls than in boys.1,3 Most boys with CPP) O: k- P5 {" f9 g6 O
may have a central nervous system lesion that is
- D1 v. k( J. L+ ^) m9 Presponsible for the early activation of the hypothal-) y& W3 ]" t5 O
amic pituitary gonadal axis.1-3 Thus, greater empha-# O) R0 ]* K$ |9 O
sis has been given to neuroradiologic imaging in1 Z: E" v/ @5 Z
boys with precocious puberty. In addition to viril-
" M4 X' q" [! _ @6 \2 iization, the clinical hallmark of CPP is the symmet-
! n/ c: H5 W8 _: W+ _8 c) ^rical testicular growth secondary to stimulation by
$ r& b& H0 K6 l* Zgonadotropins.1,30 w# d0 T% ]; @
Gonadotropin-independent peripheral preco-
1 _0 x" B | Ccious puberty in boys also results from inappropriate
9 s0 k. N& I. [' O! c8 Dandrogenic stimulation from either endogenous or
) D9 J1 ?8 `/ l& R2 \6 x- Fexogenous sources, nonpituitary gonadotropin stim-) H' u5 v- L, S0 x
ulation, and rare activating mutations.3 Virilizing- m: O/ `! u) H
congenital adrenal hyperplasia producing excessive
7 I" r" T4 J* m n: Sadrenal androgens is a common cause of precocious$ }5 m, H6 q T9 e: _
puberty in boys.3,4 G6 Q4 [4 |6 h# {/ I( ]7 e
The most common form of congenital adrenal7 G2 f- c% W, s! q4 |% r
hyperplasia is the 21-hydroxylase enzyme deficiency.: E5 \' s5 V$ g# U4 s
The 11-β hydroxylase deficiency may also result in" R8 N; e- X) n# c
excessive adrenal androgen production, and rarely,
% J7 ]% R/ w; I7 B2 van adrenal tumor may also cause adrenal androgen" R7 E0 X9 Y& `6 i- [% Z- l
excess.1,3% t. D1 X" c. @- I
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! H, I! b5 c2 y0 N" K
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007$ [; U& v! _' ~/ {( D
A unique entity of male-limited gonadotropin-
9 D; D& t' V' p4 M! b. p2 s: |independent precocious puberty, which is also known5 [$ j1 t N/ |' I" |
as testotoxicosis, may cause precocious puberty at a
0 P5 W' H5 ^8 O9 G+ _6 zvery young age. The physical findings in these boys
) L- G, i, H) T5 I/ w1 swith this disorder are full pubertal development,2 J0 W9 p0 b# d4 ^
including bilateral testicular growth, similar to boys# |+ o2 R" I h8 A6 t. V
with CPP. The gonadotropin levels in this disorder I4 K9 @" ]! W) V( F& }
are suppressed to prepubertal levels and do not show
: N% J. ~- C/ H9 o* A7 {0 u) A9 o1 Bpubertal response of gonadotropin after gonadotropin-5 H _9 {, [& j1 ^: l
releasing hormone stimulation. This is a sex-linked
* d9 M1 X6 [1 h! K- _autosomal dominant disorder that affects only. n3 Y2 [, J& a, {( a! p. M
males; therefore, other male members of the family9 C# _; Q' ^ K, i/ p
may have similar precocious puberty.3
` u9 G! Y/ l5 `5 dIn our patient, physical examination was incon-, e- d; x& b5 ^7 q* R, i6 [
sistent with true precocious puberty since his testi-
5 f, y2 v# ~: xcles were prepubertal in size. However, testotoxicosis" h+ B) B( o0 t6 a
was in the differential diagnosis because his father
- l$ m2 w( a( p) Rstarted puberty somewhat early, and occasionally,& o. Q: Q, a: }; f. h$ ?
testicular enlargement is not that evident in the5 h7 u4 s( c; {" o$ a* W
beginning of this process.1 In the absence of a neg-1 }2 _3 H7 ?3 N m$ v
ative initial history of androgen exposure, our! A5 `% g8 o9 {; }, i# b2 v5 z
biggest concern was virilizing adrenal hyperplasia,) u' T; G5 f- S$ b, k
either 21-hydroxylase deficiency or 11-β hydroxylase% W# \& A8 Z+ A& F2 c' Y$ `; b
deficiency. Those diagnoses were excluded by find-
+ m T& r4 O, T9 s4 c% Ling the normal level of adrenal steroids.0 W1 H' `( Q+ N5 }) o/ l
The diagnosis of exogenous androgens was strongly
% }/ R9 A' G. n& e0 Z8 g: ]; Ssuspected in a follow-up visit after 4 months because
" B$ }4 `9 n, ethe physical examination revealed the complete disap-
6 d+ s1 d4 ^8 M# t: J3 u) Qpearance of pubic hair, normal growth velocity, and( W# A7 r' i. j, {; V
decreased erections. The father admitted using a testos-* d1 X; |% u" k# N, ^
terone gel, which he concealed at first visit. He was# j: V0 [; q( E" I0 n
using it rather frequently, twice a day. The Physicians’/ N/ ~; ~) D k& N p7 n6 H
Desk Reference, or package insert of this product, gel or
$ o8 J V/ x; O! x; V0 ?0 H# icream, cautions about dermal testosterone transfer to
3 ?$ w9 g+ c/ Y. }9 E! x9 Z& dunprotected females through direct skin exposure.
& J! | Q! ]2 {; C! }, r9 \Serum testosterone level was found to be 2 times the( R# ]8 }) Z* m# u6 [" k' ~3 |& Y6 p
baseline value in those females who were exposed to
9 D# @2 x D& p3 Zeven 15 minutes of direct skin contact with their male
$ {' z/ {' m' E% m0 @0 F; G0 @partners.6 However, when a shirt covered the applica-
+ F0 q$ j- k+ S: V& ction site, this testosterone transfer was prevented.
% G: L0 u- k: s0 C; ]Our patient’s testosterone level was 60 ng/mL," X" O5 b; i4 x" C
which was clearly high. Some studies suggest that; E1 K3 o0 k& ^3 L: ?- Z
dermal conversion of testosterone to dihydrotestos-
1 {. r2 M' e+ {3 pterone, which is a more potent metabolite, is more I$ _2 |) q; f1 w0 n' M
active in young children exposed to testosterone
# @4 i: o* y5 ]* C, c5 X3 c& r" P) eexogenously7; however, we did not measure a dihy-
, P' J' \7 [! }drotestosterone level in our patient. In addition to8 |) r2 u: s" c; a) v
virilization, exposure to exogenous testosterone in% k' o8 s5 r& A
children results in an increase in growth velocity and
( P* @* i, T- _: n$ u3 o/ ]6 z. qadvanced bone age, as seen in our patient.
1 `; }, }8 S4 s2 ]0 U# a, K! LThe long-term effect of androgen exposure during5 i, d/ u, E: b) Y( m
early childhood on pubertal development and final1 y* E8 Z6 H, x0 a/ y
adult height are not fully known and always remain
. \7 S$ C( p# u" ^6 ta concern. Children treated with short-term testos-2 C' R x2 ?$ y( p. V" `) y
terone injection or topical androgen may exhibit some
2 O3 n8 h4 c( J \acceleration of the skeletal maturation; however, after6 I: k2 N }( `3 N7 g' l
cessation of treatment, the rate of bone maturation1 r: |# H3 t, M1 P- U$ y, Z& u2 Y
decelerates and gradually returns to normal.8,9
$ `' F2 N% O$ ]$ F8 uThere are conflicting reports and controversy, |; f( H$ j% m R/ R; o# P
over the effect of early androgen exposure on adult
/ t h0 o- r0 }! |( gpenile length.10,11 Some reports suggest subnormal
% A: d+ f) U1 kadult penile length, apparently because of downreg-% ] F4 I' b+ _' T5 D
ulation of androgen receptor number.10,12 However,
( n) e+ g- N9 F/ r( xSutherland et al13 did not find a correlation between
7 ^* j/ I' P) l1 dchildhood testosterone exposure and reduced adult+ C3 z! _2 r2 o$ U- R2 C
penile length in clinical studies.
, M4 D* o4 t3 ^1 q4 }" VNonetheless, we do not believe our patient is
1 K5 k6 r/ Y/ w, [/ ~going to experience any of the untoward effects from4 t+ m/ z( w3 j8 n
testosterone exposure as mentioned earlier because8 H( N! x0 ~; {% u* ?* Q! L" S
the exposure was not for a prolonged period of time.
N: P! c) A9 |* O; y! lAlthough the bone age was advanced at the time of
. @6 ]' p: W- @1 p2 O5 y* { W/ Zdiagnosis, the child had a normal growth velocity at
3 U# L' z9 `0 x3 {3 x3 Ethe follow-up visit. It is hoped that his final adult" a5 }8 x4 a1 w/ W8 T, u7 o& E
height will not be affected.
) U7 I+ h8 @9 c" j+ QAlthough rarely reported, the widespread avail-% E2 v ^ t P2 o, P; J R" e
ability of androgen products in our society may9 U# o$ I) J/ K( j7 x$ i
indeed cause more virilization in male or female! s8 L4 G8 q$ ?7 o3 b m: o
children than one would realize. Exposure to andro-1 q. d; S+ H5 |4 W) L
gen products must be considered and specific ques-) ~& I$ f$ v2 z: D; j( b
tioning about the use of a testosterone product or# f: J$ x( M9 G" E& o
gel should be asked of the family members during5 Q7 U* ]( A; C
the evaluation of any children who present with vir-
5 B/ @; i& _4 u. gilization or peripheral precocious puberty. The diag-
8 w3 _0 @; Z; I; S/ a ?5 |nosis can be established by just a few tests and by: j; H6 e0 L1 J& l& J/ ]$ w
appropriate history. The inability to obtain such a2 s0 o% A0 ?! e+ N3 m
history, or failure to ask the specific questions, may% X- N; u0 r, U- V$ b: p( B
result in extensive, unnecessary, and expensive8 p9 j7 o: Z# _ I |# I( {8 o9 N
investigation. The primary care physician should be
5 O3 a4 i2 E0 A$ vaware of this fact, because most of these children6 C8 k% A+ s+ z) R' @. q' U
may initially present in their practice. The Physicians’
0 b- { [* B. h9 g: ~6 k' wDesk Reference and package insert should also put a0 j# Q( c" ^+ j* ^( W8 z2 `
warning about the virilizing effect on a male or
; ]$ D. U/ s5 T, n4 o1 M& rfemale child who might come in contact with some-
0 Z6 U1 ^- U% R- n, C" ^2 ?# ?+ ]one using any of these products.
3 h+ n, ~1 E( V; `3 H- qReferences) P* ?' ^0 X) X' C) A, D! ^
1. Styne DM. The testes: disorder of sexual differentiation' A6 }2 \9 j8 G
and puberty in the male. In: Sperling MA, ed. Pediatric
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2002: 565-628.9 ]; ^4 i, b: D& Q; l! B, x1 p
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious% w- B. T. [" M. ?/ N* }! p
puberty in children with tumours of the suprasellar pineal- Y: [) B& T! g2 a9 [5 M
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5 y2 E" |) y# h& m& n- hTopical Testosterone Exposure / Bhowmick et al 543
) K; f, F3 u1 b; x. fareas: organic central precocious puberty. Acta Paediatr.
$ Y/ c. n7 v% w' g% m2001;90:751-756.
6 L2 L1 x4 M$ _8 Q0 z3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.+ v4 _, u. _( _2 B" y' l0 G) U6 ^
Pediatric Endocrinology. 4th ed. New York, NY: Marcel4 j* P8 L# Q- x+ ^( G9 |
Dekker Inc; 2003:211-238.! x, ]8 ~& [+ Z" ?4 I& Y
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual' ~ ]8 I- e* w' D5 H# @0 M- o3 B4 l* G8 H
development in a two-year-old boy induced by topical7 s: J6 u' R* j; v! i
exposure to testosterone. Pediatrics. 1999;104:e23.$ G8 A$ \/ W3 ]; F i
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
* |6 |# O& H* s ?/ c( O9 I, [! ySkeletal Development of the Hand and Wrist. 2nd ed.* p2 i+ `* L6 V" T9 W" M
Stanford, CA: Stanford University Press; 1959. O7 V0 z8 K4 H$ W2 e
6. Physicians’ Desk Reference. Androgel 1% testosterone,
+ a$ Y7 N. s8 r& H# ~Unimed Pharmaceutical Inc. Montvale, NJ: Medical
; e9 _* _. `4 k4 ~0 zEconomics Company, Inc; 2004:3239-3241.; t8 n) i5 C# q% t7 r2 ^
7. Klugo RC, Cerny JC. Response of micropenis to topical
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