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is a significant concern for physicians. Central: ]6 c' u; h9 e
precocious puberty (CPP), which is mediated
# ~" g; `9 O, o! S' B5 B6 kthrough the hypothalamic pituitary gonadal axis, has
4 |* g' c6 n0 ma higher incidence of organic central nervous system
- U. [1 X+ C7 I# x1 p+ \& w% T% Slesions in boys.1,2 Virilization in boys, as manifested' I1 ~% E0 ?* j% v
by enlargement of the penis, development of pubic
) D# M2 S5 ? d: A% yhair, and facial acne without enlargement of testi-; b! b% ~6 \' I9 K6 F$ I
cles, suggests peripheral or pseudopuberty.1-3 We
0 u, P4 \4 H/ x* d' V. z: Areport a 16-month-old boy who presented with the( r1 G% a, g1 Z: T
enlargement of the phallus and pubic hair develop-8 M4 N/ v8 O6 S% \' d1 p
ment without testicular enlargement, which was due
& M1 U) o4 \4 Y" d- ?0 b, Yto the unintentional exposure to androgen gel used by
1 `' l& m- \. s- D( R7 j7 Q% Hthe father. The family initially concealed this infor-
- U) M) Y2 Y' l: d" Z2 ?& Qmation, resulting in an extensive work-up for this
% j, T: c) L6 {8 c. W* D' x) ?child. Given the widespread and easy availability of @( ?# t& H3 D' b
testosterone gel and cream, we believe this is proba-
5 ^- Q; l5 w1 l0 p! Q7 Gbly more common than the rare case report in the
3 d( u$ G6 Q R% C E/ ^literature.4
# j8 q$ x- }" ^) e7 O" G7 r5 [Patient Report
' n! E. |+ }5 N3 R. Y f9 j% RA 16-month-old white child was referred to the8 G) Z" O( U* d6 ?
endocrine clinic by his pediatrician with the concern
7 B& p- N/ U K- U. N. `of early sexual development. His mother noticed% @! @4 s+ J& R0 \( M
light colored pubic hair development when he was M/ M4 g+ z$ B" L- X
From the 1Division of Pediatric Endocrinology, 2University of
. s$ q$ u3 J$ j# U5 V; g: p" G6 hSouth Alabama Medical Center, Mobile, Alabama.' B& ]. w8 d: `0 d
Address correspondence to: Samar K. Bhowmick, MD, FACE,
^! e n; M q5 g/ [Professor of Pediatrics, University of South Alabama, College of
$ S- q! {! n) i; t- r0 a3 sMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;2 E8 z8 ]' s5 z* h, `* ^
e-mail: [email protected].5 L8 ]4 p# A% c0 V7 x
about 6 to 7 months old, which progressively became* ~5 e$ P `& k8 h3 {* _
darker. She was also concerned about the enlarge-6 ~3 p% B! f# s, @2 A/ I
ment of his penis and frequent erections. The child
' `9 i! O9 l$ L& P, Rwas the product of a full-term normal delivery, with
0 E& u- C% U, P0 Sa birth weight of 7 lb 14 oz, and birth length of
/ O6 E# e4 k# N0 _20 inches. He was breast-fed throughout the first year
, b+ H" k5 R- K3 x# Kof life and was still receiving breast milk along with- k" T* j2 ?1 L' v7 z( i
solid food. He had no hospitalizations or surgery,; ?/ A+ }: `7 R: L8 P1 `
and his psychosocial and psychomotor development
- q2 K( U8 ^3 L3 T2 cwas age appropriate.* |9 Z+ ?, u$ c) [2 v
The family history was remarkable for the father,
' A& x# m5 S0 R& P. Z* `who was diagnosed with hypothyroidism at age 16,
( O" t/ }$ ?4 n( ?, jwhich was treated with thyroxine. The father’s# y: e* Y' s" e5 B* T
height was 6 feet, and he went through a somewhat) T' F A6 }% y- E0 Y
early puberty and had stopped growing by age 14.# M" b7 p7 J2 L- d9 H" |( Q3 d
The father denied taking any other medication. The$ \6 c' }9 F: U v x
child’s mother was in good health. Her menarche/ h* |) }7 }8 n# r. `
was at 11 years of age, and her height was at 5 feet
6 u" D o! k G C5 K+ Y5 inches. There was no other family history of pre-, O3 Q# O2 ?0 g2 v0 {' F* ]
cocious sexual development in the first-degree rela-$ n% M; K% \$ Y; f) S
tives. There were no siblings.
2 d6 {' ~- J$ Z' n# S2 G+ jPhysical Examination! J1 J9 w: x3 Y0 t- M9 K
The physical examination revealed a very active,1 D# m: A# C$ h. `* y' x, }: C1 P
playful, and healthy boy. The vital signs documented6 A3 j1 Y: C, b! N, G
a blood pressure of 85/50 mm Hg, his length was
L$ r: K7 L+ c. T: @90 cm (>97th percentile), and his weight was 14.4 kg+ g1 W' E6 b7 _+ b- Z2 _
(also >97th percentile). The observed yearly growth$ _+ P/ @2 C1 C3 a" j1 C6 x m% z
velocity was 30 cm (12 inches). The examination of& l/ P( \( _; k# N! e7 c9 N) ^
the neck revealed no thyroid enlargement.
8 i9 W2 v# P# j: A! ^! NThe genitourinary examination was remarkable for) ]8 e# h9 E- X' D8 o) B, D- j5 F
enlargement of the penis, with a stretched length of
9 e7 V: W5 n( f; [+ k8 cm and a width of 2 cm. The glans penis was very well% G$ L2 { I9 W5 R: ?1 a4 y& ^) f
developed. The pubic hair was Tanner II, mostly around! e L' S& [1 w8 M. U
540
. }% t8 _ h! h% P! Q! z6 Hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from4 O5 H: X, V" N" g/ H5 C% c
the base of the phallus and was dark and curled. The
) p. V s0 v: ^& Y2 p7 c1 Wtesticular volume was prepubertal at 2 mL each.
O' f& \+ g! `9 ]" O( nThe skin was moist and smooth and somewhat \+ c2 _5 \- @* Y+ e- C6 k
oily. No axillary hair was noted. There were no
! J) |4 O) Q- ?abnormal skin pigmentations or café-au-lait spots.
, e$ ]/ q; p' A( S3 ONeurologic evaluation showed deep tendon reflex 2+
3 u O" N2 L( a3 C& l! r obilateral and symmetrical. There was no suggestion
" V7 _. X& i7 Iof papilledema.( @% z- V6 t; M
Laboratory Evaluation K% k2 j, _3 P1 j4 }' \" S
The bone age was consistent with 28 months by- k4 ]. z' m5 M6 {# \
using the standard of Greulich and Pyle at a chrono-
, j8 w# |: H3 Zlogic age of 16 months (advanced).5 Chromosomal' S( K4 n! P, a n# \. b$ `
karyotype was 46XY. The thyroid function test
8 h' f: `" G+ b; Lshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
2 J: Q4 n5 Q; y6 Z- L! D) T9 wlating hormone level was 1.3 µIU/mL (both normal).
1 M- y' G0 \4 ~7 \7 j1 MThe concentrations of serum electrolytes, blood
- j- |6 {9 b/ ~* h6 Q4 {# iurea nitrogen, creatinine, and calcium all were
. o- k1 S) K/ s9 Kwithin normal range for his age. The concentration* Q9 k# M; N" L1 S4 ?) x6 l0 h
of serum 17-hydroxyprogesterone was 16 ng/dL( u: l8 w$ o2 Z/ D/ G! B. {& c- S% y
(normal, 3 to 90 ng/dL), androstenedione was 20$ P4 z' ?/ k' r5 i5 l
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
" y L: Y7 r, q: x, Vterone was 38 ng/dL (normal, 50 to 760 ng/dL),6 l- W$ v4 f1 S+ R1 h( u4 J3 l9 X
desoxycorticosterone was 4.3 ng/dL (normal, 7 to. j& @% \7 U& U0 \1 @
49ng/dL), 11-desoxycortisol (specific compound S)
j* Z3 U$ N# Twas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor- H+ n9 Q6 ^# Z/ B0 I) x" o( p# s
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
1 l" M% ?5 g6 ? [- rtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
. |! U# h9 ?6 E" @and β-human chorionic gonadotropin was less than
; u$ @: t7 @, c% q5 mIU/mL (normal <5 mIU/mL). Serum follicular3 D' k/ Z$ _0 |9 x/ V' K+ T
stimulating hormone and leuteinizing hormone3 N. b' M9 D8 l) k: q
concentrations were less than 0.05 mIU/mL
- Z0 ^& h% s* X" M T( h4 `) N(prepubertal).
6 p2 K7 R3 D* m/ [7 G8 YThe parents were notified about the laboratory* w3 d# A$ K+ }3 {/ M
results and were informed that all of the tests were( v# m8 H( Q Z
normal except the testosterone level was high. The
7 h# `+ ]* q' A8 yfollow-up visit was arranged within a few weeks to
* B9 \4 E: U1 r+ J3 wobtain testicular and abdominal sonograms; how-
* }- c% \, U& o; fever, the family did not return for 4 months.
) f1 B% V! L3 C+ \) d; APhysical examination at this time revealed that the. h6 X$ d/ r3 d5 O+ z F3 Y
child had grown 2.5 cm in 4 months and had gained* M* V$ x t( r. w t
2 kg of weight. Physical examination remained
4 O% j5 _! }2 F: E# ]5 ounchanged. Surprisingly, the pubic hair almost com-
9 S' |2 \) b. ]& R3 E* Zpletely disappeared except for a few vellous hairs at
" h- l1 Y1 b8 ^1 w# C* c5 X, i: gthe base of the phallus. Testicular volume was still 2
$ E+ I% y; g, a) l2 NmL, and the size of the penis remained unchanged.
* X/ m9 z/ \) e% n4 ^0 _' @The mother also said that the boy was no longer hav-
$ Z! G- ^; {8 i# b3 i* u+ d$ Ging frequent erections., Z) g6 `! J. q' c% G b) r6 Y7 ~
Both parents were again questioned about use of$ U9 ^) |# a! |! B" q
any ointment/creams that they may have applied to, R9 ?8 K9 a6 f0 n
the child’s skin. This time the father admitted the3 k$ b8 q! ~' c- _2 H
Topical Testosterone Exposure / Bhowmick et al 541" z& @( H, D' e' A5 K1 O
use of testosterone gel twice daily that he was apply-6 ?! s# h( `7 m4 z
ing over his own shoulders, chest, and back area for
$ c" E) D" X" K& B9 Q1 Pa year. The father also revealed he was embarrassed0 r0 @' W3 z! f5 @
to disclose that he was using a testosterone gel pre-" K! w/ V, C4 i$ [6 }2 h+ G# f
scribed by his family physician for decreased libido' B: P7 S8 Y. A+ x0 D& X
secondary to depression.
$ ]+ x( g& h, i5 g$ g0 U' Z' aThe child slept in the same bed with parents.- i: V2 ?1 b w. D/ C
The father would hug the baby and hold him on his& ^& a: B" h- u$ }' e- M/ t$ M" w# d
chest for a considerable period of time, causing sig-" b; n3 o: a4 _1 J) a. @ q: b3 Z
nificant bare skin contact between baby and father.
2 U, L8 e& |- A6 [4 UThe father also admitted that after the phone call,
y/ l* D% r$ I7 W1 f1 S# bwhen he learned the testosterone level in the baby
( T$ G& Q) X9 ~9 s# ]9 Mwas high, he then read the product information T5 I2 h; \) ~! }& X& b8 @
packet and concluded that it was most likely the rea-
, Z( y1 |; J I3 A$ |2 Tson for the child’s virilization. At that time, they: z! k: U3 M7 P0 }5 R4 `( Y* w
decided to put the baby in a separate bed, and the' |2 K0 K- X9 O, ^7 F9 A9 P
father was not hugging him with bare skin and had, ? o4 _ F% a" J+ I
been using protective clothing. A repeat testosterone
" r* Y6 H5 D# B. [: ?; Ttest was ordered, but the family did not go to the
0 A$ W% y+ }& ~& F I+ m4 ]' _ Zlaboratory to obtain the test.8 [$ e/ E" @0 A" Y
Discussion
0 d4 ~( a! a7 P4 [6 hPrecocious puberty in boys is defined as secondary
# p, u# s# ?6 U+ K7 p, Vsexual development before 9 years of age.1,4; o1 |9 H/ G. w3 h4 S! d9 [
Precocious puberty is termed as central (true) when- a9 F4 _8 j/ W% v: E" [( \
it is caused by the premature activation of hypo-
' e5 Z$ W/ h" p, k$ Mthalamic pituitary gonadal axis. CPP is more com-* @1 S) Z* k. b) ~8 O& P! S% l
mon in girls than in boys.1,3 Most boys with CPP1 s9 L5 E: p6 Z ]. a
may have a central nervous system lesion that is r B% C1 g+ I
responsible for the early activation of the hypothal-' \6 c4 L) p( ^% t% M) L
amic pituitary gonadal axis.1-3 Thus, greater empha-
9 f3 t: H' R& n) ~sis has been given to neuroradiologic imaging in
0 n! w) h3 Y) r: @. Xboys with precocious puberty. In addition to viril-
6 \" a. N3 O; y5 g' Kization, the clinical hallmark of CPP is the symmet-
3 T7 s' x5 {. k: h/ u, T& urical testicular growth secondary to stimulation by
1 ]/ w4 |4 k* E9 [3 Dgonadotropins.1,3
8 Q! z2 L& I, w' [Gonadotropin-independent peripheral preco-+ r2 Q0 p, I: w/ F
cious puberty in boys also results from inappropriate6 ~% K3 l" N0 ]+ t' G' m% Z7 l
androgenic stimulation from either endogenous or1 {% m* e" E( V @+ H& C2 {
exogenous sources, nonpituitary gonadotropin stim-) h/ w, `7 i! V8 N
ulation, and rare activating mutations.3 Virilizing
+ U' l, h+ s- ~: E% W4 ^congenital adrenal hyperplasia producing excessive! @2 m/ g+ m; E0 |: r
adrenal androgens is a common cause of precocious
& `8 q" A8 A2 _/ q+ q$ m7 Mpuberty in boys.3,4
7 E0 z2 \- `0 y6 t" GThe most common form of congenital adrenal
: g: n( U. `* `: y$ _* s3 b1 [+ thyperplasia is the 21-hydroxylase enzyme deficiency.. n3 W3 |. F$ s$ f& }9 }3 S& q
The 11-β hydroxylase deficiency may also result in/ F" K7 ?: Q& {$ `8 C
excessive adrenal androgen production, and rarely,+ M1 \4 ^! R! y; @2 X- W: F
an adrenal tumor may also cause adrenal androgen# k8 {( J4 j& Z9 _& C4 s
excess.1,3
1 [) [, P% m7 c+ Y6 `at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from& x1 |* s d, m7 f) o q; q
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
; _3 b/ q( C- A! d. r, WA unique entity of male-limited gonadotropin-4 V! P1 k3 a: Y9 V
independent precocious puberty, which is also known
0 l& Z+ [8 |8 l" R# {as testotoxicosis, may cause precocious puberty at a" @% P) q( h. F( ?3 e A
very young age. The physical findings in these boys2 g( H5 b+ }8 r* V. ` j& s
with this disorder are full pubertal development,
- p! ] V- m" ?$ ]/ I5 `7 t+ vincluding bilateral testicular growth, similar to boys! ^1 R9 x3 V X1 l' T/ v! D
with CPP. The gonadotropin levels in this disorder7 p* L- R. S* z
are suppressed to prepubertal levels and do not show6 e) k. p$ @1 z% S
pubertal response of gonadotropin after gonadotropin-1 U6 E' g- k) H8 u% Z2 r
releasing hormone stimulation. This is a sex-linked5 z. k' ?* y3 z, W9 d/ P3 P
autosomal dominant disorder that affects only
_4 {( ?& U/ j% ]males; therefore, other male members of the family
5 e4 Y! Y" X; g. R3 m, Y9 f7 lmay have similar precocious puberty.3
o2 Y' [( h m8 N$ z3 I' U' _/ bIn our patient, physical examination was incon-
1 W/ W S6 a3 T( E& G, f; wsistent with true precocious puberty since his testi-
3 y' H3 _! f: s; A, wcles were prepubertal in size. However, testotoxicosis
9 s5 u" C7 M* D9 j, b7 ]was in the differential diagnosis because his father
$ S u# A# ^5 m. F, |0 g% a* e9 ]started puberty somewhat early, and occasionally,% L6 A/ o& S j m' x" m
testicular enlargement is not that evident in the
' I) h! c9 Z+ d+ ~& Ubeginning of this process.1 In the absence of a neg-
: O8 S1 \: ]. l* C9 d( Cative initial history of androgen exposure, our: x0 m8 Z3 [; ^& C
biggest concern was virilizing adrenal hyperplasia,+ m4 V( U# p p/ d$ r
either 21-hydroxylase deficiency or 11-β hydroxylase
& D' R: w1 H; g+ kdeficiency. Those diagnoses were excluded by find-2 v" [3 B5 J1 p! }0 I0 F
ing the normal level of adrenal steroids.) X1 ~- r8 X7 ?% \
The diagnosis of exogenous androgens was strongly' C/ U# K: v! h, W
suspected in a follow-up visit after 4 months because
1 F- e6 f" A, t! sthe physical examination revealed the complete disap-
* a' b2 J+ r$ h5 ~pearance of pubic hair, normal growth velocity, and
8 {9 _5 H7 n& a0 `decreased erections. The father admitted using a testos-
' \: k G$ o; `) H* R: C! ~* _terone gel, which he concealed at first visit. He was- W( p: e4 Q( e( @& O
using it rather frequently, twice a day. The Physicians’8 D; g+ S( V+ s! D0 y
Desk Reference, or package insert of this product, gel or
?+ Y5 N/ A+ i! q* r* {3 Xcream, cautions about dermal testosterone transfer to
: m) T" r7 S. aunprotected females through direct skin exposure./ Z( i5 \1 B; a' K5 g
Serum testosterone level was found to be 2 times the
`7 E0 Z0 R$ m, V/ ibaseline value in those females who were exposed to
& \& q$ a/ ~0 k$ r+ seven 15 minutes of direct skin contact with their male
8 w7 Q9 Z6 u- q. V( J8 Jpartners.6 However, when a shirt covered the applica-
/ Y p" M+ @4 Rtion site, this testosterone transfer was prevented.( }0 z% B* p, ^# n
Our patient’s testosterone level was 60 ng/mL,
0 G/ o" R8 Z l$ P; a4 I* Nwhich was clearly high. Some studies suggest that5 l! W& W0 [5 r- ~
dermal conversion of testosterone to dihydrotestos-4 B# A8 M3 r, Y' O) v1 U
terone, which is a more potent metabolite, is more
P8 E* V' G' g( w& R0 N: k+ Zactive in young children exposed to testosterone; c4 }* x3 M& W" f! _6 o
exogenously7; however, we did not measure a dihy-
( N/ \, n" A, ]% ?drotestosterone level in our patient. In addition to
% n6 R' h* I5 A- bvirilization, exposure to exogenous testosterone in% M4 M) c4 T! `3 p2 L1 B
children results in an increase in growth velocity and8 l/ W% B& m' [# f4 \
advanced bone age, as seen in our patient.
" _; I' `" X6 ^/ r: N* S/ @+ U* cThe long-term effect of androgen exposure during0 Y& z# ?: G: G- H0 @- @1 Z8 A
early childhood on pubertal development and final# n( E: S6 S4 n! J5 l0 }! q& l
adult height are not fully known and always remain
l+ W6 e/ a, da concern. Children treated with short-term testos-
, E0 V1 @ [+ j8 k; t8 t) nterone injection or topical androgen may exhibit some5 d* l: U$ w# z* ^3 B- ^
acceleration of the skeletal maturation; however, after* h+ z7 |& I# [* n0 Y
cessation of treatment, the rate of bone maturation% [0 ]# e3 s' U$ S; I' ?
decelerates and gradually returns to normal.8,9
; O' }# g! W9 c* WThere are conflicting reports and controversy0 n! ], X* E9 Z. X8 T3 {+ p
over the effect of early androgen exposure on adult
\8 x( U0 E( [penile length.10,11 Some reports suggest subnormal
: I) K$ ^; I6 j/ p; J. k2 `6 tadult penile length, apparently because of downreg-# h/ E& m* Q. r
ulation of androgen receptor number.10,12 However,
9 L/ i+ ^7 w# j) lSutherland et al13 did not find a correlation between
6 X! t% M8 W1 p: C0 lchildhood testosterone exposure and reduced adult$ ~3 I7 E& Q/ v0 ~
penile length in clinical studies.
% |, S# g& X, O# n, NNonetheless, we do not believe our patient is
0 [2 k) g" n& Q. p" cgoing to experience any of the untoward effects from$ l: j. O g. H, t$ B) ?
testosterone exposure as mentioned earlier because
3 p% Z+ N; `1 C$ M2 x3 o0 vthe exposure was not for a prolonged period of time., Y* c6 _6 O! O
Although the bone age was advanced at the time of$ N; R, b P+ ?/ f
diagnosis, the child had a normal growth velocity at
: s$ q; d5 |: B0 k4 F( z- Y% nthe follow-up visit. It is hoped that his final adult
9 e1 }& I4 H5 }% d2 H0 f: Jheight will not be affected.7 p! ~5 ]( \ ]; U* U/ W
Although rarely reported, the widespread avail-
' c! X# N# f5 a( Z; [ability of androgen products in our society may
9 F1 z4 J# y: z( c6 D" \indeed cause more virilization in male or female
2 u6 g: ^+ L2 Schildren than one would realize. Exposure to andro-% f2 f3 ~( J, L' g7 D
gen products must be considered and specific ques-1 R% s* } Q: H) h: i8 C j8 B
tioning about the use of a testosterone product or6 h6 o; D. m3 T# H5 G
gel should be asked of the family members during
# @, x& h) {& p# Jthe evaluation of any children who present with vir-
1 \! L- k- }/ S7 B* p! f8 C! Rilization or peripheral precocious puberty. The diag-
4 d9 k7 \ a2 @5 j l: rnosis can be established by just a few tests and by5 X9 ~1 M9 v7 N. Y
appropriate history. The inability to obtain such a- F f( p( x1 v
history, or failure to ask the specific questions, may
) y2 A9 T: c! a' qresult in extensive, unnecessary, and expensive
0 G9 s0 b8 y# B: b8 h3 `6 B. Minvestigation. The primary care physician should be
B) G# v2 v) C. I0 ^8 l7 ]aware of this fact, because most of these children
6 C" u- S5 }( Omay initially present in their practice. The Physicians’: x7 E' i: n; k$ O# J
Desk Reference and package insert should also put a
$ H l8 l% P8 d3 y7 z$ vwarning about the virilizing effect on a male or4 |& g/ \; G9 h8 v7 O
female child who might come in contact with some-! n; E* x. U$ \' w8 O; p4 w# g# o
one using any of these products.
3 J" u) z7 b z6 n$ ]2 o) U- z4 rReferences
/ _/ m5 z1 E9 G( q! W6 X1 d1. Styne DM. The testes: disorder of sexual differentiation, L- I J3 D5 e+ w. K0 N( N
and puberty in the male. In: Sperling MA, ed. Pediatric# M3 W2 m" h7 U9 C
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;; P5 x3 b4 E- ^. e f B% m# G
2002: 565-628.* F' o1 `. X& W: W' \
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious# e' [ E0 e& |8 U/ \' W
puberty in children with tumours of the suprasellar pineal" i7 C- z! L# q" q* C% U$ P/ O
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
) q+ ^- m! E0 G M9 @' \* v8 bTopical Testosterone Exposure / Bhowmick et al 543. F: y/ b* C p; F
areas: organic central precocious puberty. Acta Paediatr.& G2 z5 |; _, d/ W, x
2001;90:751-756.
}9 Z1 }" ~, V8 Y3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.9 z# N/ X' h4 V3 `2 j4 N7 U) u
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
( I" [* |0 M jDekker Inc; 2003:211-238.$ ]* r I7 }- E0 W* s
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual$ \' P6 T; G! U* }+ V1 F
development in a two-year-old boy induced by topical+ K/ h; B. D1 _: k: [
exposure to testosterone. Pediatrics. 1999;104:e23.2 D: c: i: ]+ \5 _
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of5 B" E$ X) G) o3 x+ a6 I: V
Skeletal Development of the Hand and Wrist. 2nd ed.
( b0 s3 v- U+ X( B7 gStanford, CA: Stanford University Press; 1959.
6 _. `3 Z/ _! j. A9 d9 u# n: W6. Physicians’ Desk Reference. Androgel 1% testosterone,
% L" j8 H) T$ E- Y9 @/ m' kUnimed Pharmaceutical Inc. Montvale, NJ: Medical
( {3 Z: g+ q/ U- l% y4 k+ D; aEconomics Company, Inc; 2004:3239-3241., C2 }9 [( S: F( f2 Q( h
7. Klugo RC, Cerny JC. Response of micropenis to topical) p* c/ k- a+ E- u8 p9 H Z
testosterone and gonadotropin. J Urol. 1978;119:
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