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is a significant concern for physicians. Central3 Q Q- m! N: O
precocious puberty (CPP), which is mediated% }& ^9 \1 r& M* k" k
through the hypothalamic pituitary gonadal axis, has
5 x% W/ P# P. @4 V' Ja higher incidence of organic central nervous system/ j/ b" B6 Z% ]5 h l& B
lesions in boys.1,2 Virilization in boys, as manifested
! ^& ?1 ^, ` Qby enlargement of the penis, development of pubic
. n- @& H' r0 b$ rhair, and facial acne without enlargement of testi-
- W# U7 k) X, j1 kcles, suggests peripheral or pseudopuberty.1-3 We
3 a3 E0 m/ Y3 ^/ i* Y. |report a 16-month-old boy who presented with the+ P4 L4 ?) h- t) o9 H, R* D. F
enlargement of the phallus and pubic hair develop-6 `9 o% N( r; N' X0 G, z
ment without testicular enlargement, which was due
# G* Y6 G+ T# V& \to the unintentional exposure to androgen gel used by# K+ ?2 a) J% L1 i+ U! W0 `3 s
the father. The family initially concealed this infor-
, ^' A7 s+ i) |7 Z" e9 [- Mmation, resulting in an extensive work-up for this
! d; f4 s4 |. W7 [/ @( T; o' Jchild. Given the widespread and easy availability of. }2 k& ]/ ~" ]
testosterone gel and cream, we believe this is proba-. W0 o' c5 V# V: w5 c1 b0 I
bly more common than the rare case report in the
1 ?. E& q6 F% @( Dliterature.45 l, p$ E1 f: F" c) H: B* q/ j8 t
Patient Report
' f; ^' u* A' D$ ]6 r: MA 16-month-old white child was referred to the" n+ n4 i# f7 |8 k, B3 k
endocrine clinic by his pediatrician with the concern
9 \+ K, d) _6 p7 k& ~+ Jof early sexual development. His mother noticed
( B% c: `7 q; U8 R' Slight colored pubic hair development when he was
! M9 [2 ^) L: ^5 M5 zFrom the 1Division of Pediatric Endocrinology, 2University of
5 y0 Y6 i) k$ `( `5 L5 \& x4 m3 _South Alabama Medical Center, Mobile, Alabama.! `9 k" t( ~; M7 b
Address correspondence to: Samar K. Bhowmick, MD, FACE,* d: N8 w1 p% j5 A
Professor of Pediatrics, University of South Alabama, College of/ r+ s' l' d+ J$ v
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
" c: a7 }' g& Y" Pe-mail: [email protected].) B1 X9 I7 m! x8 x* X+ Z1 Q
about 6 to 7 months old, which progressively became
( q, L% m7 p9 |) G+ Q% d* h9 Tdarker. She was also concerned about the enlarge-
3 ^% D# k& J2 z% z5 H5 \# S, ement of his penis and frequent erections. The child# O0 e% C0 v. S1 K/ L
was the product of a full-term normal delivery, with8 m. ?- O& z9 q& Z* m
a birth weight of 7 lb 14 oz, and birth length of5 ^9 ?2 v7 V# f w; Z& B' v
20 inches. He was breast-fed throughout the first year3 s5 j9 ^2 B, s' c) ~# [3 m
of life and was still receiving breast milk along with8 g4 p7 a4 P4 V8 D) ?' M0 K' ?7 D
solid food. He had no hospitalizations or surgery,
5 @1 U5 O9 k+ {6 i% tand his psychosocial and psychomotor development
% a7 h: [5 g) U. A* k$ V, x8 Nwas age appropriate.
) \. V8 d# R/ u0 V0 @The family history was remarkable for the father,
% J; q' |9 w* @who was diagnosed with hypothyroidism at age 16,
6 C; t$ L T0 ]which was treated with thyroxine. The father’s& i* f" U' V1 e( w# v
height was 6 feet, and he went through a somewhat
- r$ b7 \/ P# Fearly puberty and had stopped growing by age 14.
* J: R9 n8 k& K. m; I% {/ MThe father denied taking any other medication. The; B4 q0 C! s. l
child’s mother was in good health. Her menarche1 Z' m8 r. ?3 y ]
was at 11 years of age, and her height was at 5 feet
2 H' h3 f% c+ k6 I5 inches. There was no other family history of pre-: }5 i6 W) Z9 t
cocious sexual development in the first-degree rela-
9 v$ _ v4 {+ t: `% y6 r* Ltives. There were no siblings.
' Z" ^) W5 w2 }! f- _; M MPhysical Examination
+ i- s# ~" @! \: U8 FThe physical examination revealed a very active,+ [3 s7 ]: a- I
playful, and healthy boy. The vital signs documented
0 p0 n7 f& ^. K+ Ua blood pressure of 85/50 mm Hg, his length was8 M6 A9 V- c7 p2 U1 l+ ~9 t w
90 cm (>97th percentile), and his weight was 14.4 kg ^9 [) }0 d# l! O3 s
(also >97th percentile). The observed yearly growth
9 f% [% Z9 y7 {9 }velocity was 30 cm (12 inches). The examination of v Y1 C5 z; g) [( t7 R5 s0 T
the neck revealed no thyroid enlargement.1 S- Y$ x, v% l; P. b( ]9 [
The genitourinary examination was remarkable for
8 @ s3 L9 d/ }4 Eenlargement of the penis, with a stretched length of9 z) |7 U3 k$ F/ O) z6 j
8 cm and a width of 2 cm. The glans penis was very well
5 V: E/ f/ B! l! f# i# B" Xdeveloped. The pubic hair was Tanner II, mostly around, [! S b& \& t% F6 R; e# Z
540
9 U4 [0 F) D, ?9 L. gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from: q8 `0 B4 O: a4 l, Z
the base of the phallus and was dark and curled. The, Z( q7 c" Z6 x8 ]
testicular volume was prepubertal at 2 mL each.
! D' A# W, Y* _The skin was moist and smooth and somewhat b( O& ?, A4 Q4 a2 S" }8 D
oily. No axillary hair was noted. There were no
: y: j" r" L! w4 {abnormal skin pigmentations or café-au-lait spots.$ l- I/ m6 q2 T$ M5 J
Neurologic evaluation showed deep tendon reflex 2+
7 C4 y1 D, n6 y5 Y% cbilateral and symmetrical. There was no suggestion2 W4 Q5 I+ D0 A1 z; U. J
of papilledema.
8 B6 |1 M0 u, N8 O8 i, E. G6 d- mLaboratory Evaluation
7 }$ M8 Q" C/ S( QThe bone age was consistent with 28 months by( R# V0 Y' r1 H8 X$ L
using the standard of Greulich and Pyle at a chrono-) E& h0 p1 ]6 a A( R
logic age of 16 months (advanced).5 Chromosomal
j7 ?+ [- X% b8 |7 X' N5 gkaryotype was 46XY. The thyroid function test
1 k; U' r+ m' E ]6 {$ u1 Wshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
: ?0 ?6 j% n! j/ c5 qlating hormone level was 1.3 µIU/mL (both normal).
% F# }' `, F: o- s7 W0 s) ^* X- RThe concentrations of serum electrolytes, blood
( O7 ?- }# P2 _7 A, p* J% Ourea nitrogen, creatinine, and calcium all were, C, _) ?' I: Q% O& |/ {
within normal range for his age. The concentration
/ z/ i' c% D' S$ H1 C( @of serum 17-hydroxyprogesterone was 16 ng/dL0 v3 r3 a# z* T% @9 t( l6 c7 l
(normal, 3 to 90 ng/dL), androstenedione was 20
+ N, m) R$ t' p/ Tng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-) K3 U8 e1 ] p- ^* d* f
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
8 _4 p* n+ ?2 d* |. a/ V5 T2 g" {desoxycorticosterone was 4.3 ng/dL (normal, 7 to6 e" X+ _6 l- r. u
49ng/dL), 11-desoxycortisol (specific compound S)9 ]0 H, ~* F, M7 x
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
& J! K9 u! r5 Ttisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total8 K# Q' p+ z8 p! b; o- m1 F# W( ?
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
, _6 Q. _0 v+ A: Zand β-human chorionic gonadotropin was less than8 K/ @0 G. d! d$ x& g
5 mIU/mL (normal <5 mIU/mL). Serum follicular
4 z6 B8 l* V' ^0 H9 P) J9 ostimulating hormone and leuteinizing hormone
" x6 d" C H# v5 K. Y/ p9 lconcentrations were less than 0.05 mIU/mL+ u1 J* s0 V* S# n8 Q( _
(prepubertal).
: y# Q" O" g4 |$ B1 ?3 ^The parents were notified about the laboratory: l" f$ z" j0 Y3 ], I
results and were informed that all of the tests were
/ C9 s# Q$ u X9 c7 {; e6 Ynormal except the testosterone level was high. The4 q" t. f! q: w5 P5 D$ o
follow-up visit was arranged within a few weeks to
% |0 C! O, U) U6 `$ D) B/ W+ `1 gobtain testicular and abdominal sonograms; how-5 n7 c$ h0 M5 `( Z B
ever, the family did not return for 4 months.
. u7 P j9 [5 V: k. RPhysical examination at this time revealed that the
/ k7 V+ o( l* i; tchild had grown 2.5 cm in 4 months and had gained
0 F# [. @$ L, ?$ j+ M. \5 w' \2 kg of weight. Physical examination remained }4 F8 U# [3 o: s1 ~3 Z9 C7 O
unchanged. Surprisingly, the pubic hair almost com-" \! C Y w( x4 x+ J
pletely disappeared except for a few vellous hairs at- l9 r& s, b! ^- U
the base of the phallus. Testicular volume was still 2
$ H- n' p% X5 c, k2 FmL, and the size of the penis remained unchanged.
( W3 ^3 V5 q+ A/ Z9 y; jThe mother also said that the boy was no longer hav-! E# s' J& F' }6 Q: `! p1 Y1 t
ing frequent erections.* V3 k" y2 Z a$ l
Both parents were again questioned about use of+ _$ B& i6 n/ U3 i$ O+ b
any ointment/creams that they may have applied to$ j% h |& L# R1 Y* ~( I! [5 d" n& P
the child’s skin. This time the father admitted the
! q. p; f; a7 f7 _+ I3 @6 FTopical Testosterone Exposure / Bhowmick et al 541( M0 F, \- l- V/ O) H5 E& S
use of testosterone gel twice daily that he was apply-5 z3 @. l* u. U! F" C' Y
ing over his own shoulders, chest, and back area for- f" b/ t# i4 e+ v; B
a year. The father also revealed he was embarrassed2 }; c+ M% }7 E$ B
to disclose that he was using a testosterone gel pre-
. X2 ~) U' J1 M5 a5 _% Y g0 w0 H8 pscribed by his family physician for decreased libido
' m8 ?* Z! H9 Q8 A ?secondary to depression." q3 y& e3 D4 ?8 M% c0 [
The child slept in the same bed with parents.8 S& h4 [/ k. {7 P- l# e
The father would hug the baby and hold him on his
* L2 M% S& B) ]5 q9 jchest for a considerable period of time, causing sig-
/ p- P! G4 c5 U" Nnificant bare skin contact between baby and father.6 i& x5 C/ e* Y+ Y) m6 X5 V
The father also admitted that after the phone call,$ q! D4 _0 p8 y ?
when he learned the testosterone level in the baby
4 c# \2 {2 i. |; rwas high, he then read the product information
1 r. B4 v0 N3 R, J' O$ bpacket and concluded that it was most likely the rea-
+ S8 f Q& C( v6 e* ?! Tson for the child’s virilization. At that time, they- S3 X0 p* p8 }% I
decided to put the baby in a separate bed, and the: ^1 @8 s1 x- D/ s8 `/ O' m( \
father was not hugging him with bare skin and had% {; e5 U" V3 U; e4 D
been using protective clothing. A repeat testosterone
- J p! K8 [& t7 b- Ztest was ordered, but the family did not go to the3 }2 d# B9 P% [$ b2 Q3 w
laboratory to obtain the test.
% U) t) j! D) V! MDiscussion
" |2 I. a# d% l: {Precocious puberty in boys is defined as secondary
' z/ s8 n1 i8 j* }( Tsexual development before 9 years of age.1,4/ q& t0 ?1 C8 \9 U1 w6 V6 u! z
Precocious puberty is termed as central (true) when# \7 @- t( I0 t/ }1 |
it is caused by the premature activation of hypo-
- Q3 \$ b( I& Y8 [/ G: }thalamic pituitary gonadal axis. CPP is more com-! {" d* l+ \3 H
mon in girls than in boys.1,3 Most boys with CPP1 H+ u1 O6 D9 E% T A! x/ n
may have a central nervous system lesion that is
1 Q# |. I7 C2 k$ s+ P# Iresponsible for the early activation of the hypothal-$ ~+ K/ X& O6 s# C( r, Z2 n" K; y) y
amic pituitary gonadal axis.1-3 Thus, greater empha-
* W4 I r1 s- p$ P) `sis has been given to neuroradiologic imaging in
) ~2 l) b# |1 z" m+ }boys with precocious puberty. In addition to viril-
9 t3 i( N1 h7 `3 _, P2 S: ]8 xization, the clinical hallmark of CPP is the symmet-+ a+ F# |+ \! v g* ~& V5 E6 \0 p
rical testicular growth secondary to stimulation by
3 Y3 {- Z- L) z8 Jgonadotropins.1,3
& Q8 x0 D X2 c: H) E3 _Gonadotropin-independent peripheral preco-- P( v: @; I- T8 s
cious puberty in boys also results from inappropriate
- ?6 r( I O% |4 A1 \/ gandrogenic stimulation from either endogenous or
3 a% }+ m' E1 }$ Nexogenous sources, nonpituitary gonadotropin stim-
; b+ Z9 h* e2 G, ~7 J" c, h3 }4 x5 tulation, and rare activating mutations.3 Virilizing
8 {5 T; F9 u C0 R t! P8 p+ ucongenital adrenal hyperplasia producing excessive5 {) K7 [" r- n3 H
adrenal androgens is a common cause of precocious
$ f! O7 v$ d2 u, Vpuberty in boys.3,4 ]5 A0 \/ U2 V$ N
The most common form of congenital adrenal8 }4 c& q& b7 @* m: ?: q
hyperplasia is the 21-hydroxylase enzyme deficiency.( N$ V2 I9 Q+ x3 U! K. K
The 11-β hydroxylase deficiency may also result in
b+ q, F* c4 S1 b6 Wexcessive adrenal androgen production, and rarely,' B0 C f4 k8 z$ c+ G
an adrenal tumor may also cause adrenal androgen
) i8 k6 S$ k& E8 a1 K% [; Sexcess.1,34 z' @* H( h) t, N$ |) M& r4 ]
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
5 ]1 ^. g7 w8 }0 B1 P542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
b" W. K: c1 R# u& b* p% N# GA unique entity of male-limited gonadotropin-! x4 C# v% Q+ V' @- v
independent precocious puberty, which is also known
" { C3 H* H: Z5 a- M6 ras testotoxicosis, may cause precocious puberty at a- n- g t/ |) k3 u0 G, |; u
very young age. The physical findings in these boys
* A( z. {) [+ b4 k5 m7 ] g' jwith this disorder are full pubertal development,
" S$ I, a, W5 K& P2 \. o V8 v4 h5 Zincluding bilateral testicular growth, similar to boys. F) o5 Z! `( C9 f# P6 g
with CPP. The gonadotropin levels in this disorder
3 F$ c' C( C2 \# z$ Fare suppressed to prepubertal levels and do not show9 d; b+ u* s, ?" ^' ~& e
pubertal response of gonadotropin after gonadotropin-
! s; ^% z1 n! W/ d# Yreleasing hormone stimulation. This is a sex-linked0 K: d# \1 E5 [6 D" ?
autosomal dominant disorder that affects only5 P0 f$ _; k' B9 Y
males; therefore, other male members of the family
& I% i- @1 w( x3 o9 K/ f( B; gmay have similar precocious puberty.3
3 V6 ^4 u/ U; d0 |$ xIn our patient, physical examination was incon-
- m5 R9 U( d/ C* z( G3 Gsistent with true precocious puberty since his testi-
, C+ t% v3 N! u1 t. ?cles were prepubertal in size. However, testotoxicosis% P0 K' z( Y }/ T0 a( C
was in the differential diagnosis because his father4 R! C2 p+ x" X& N0 |2 U7 S
started puberty somewhat early, and occasionally,- `* p8 Y/ G9 f& W5 A. o' r; n
testicular enlargement is not that evident in the
3 L* K6 g( l4 g8 {. jbeginning of this process.1 In the absence of a neg-
& L5 Q0 C( y W4 jative initial history of androgen exposure, our$ w: ~, O, s2 V# h* {; i
biggest concern was virilizing adrenal hyperplasia,
9 j# W+ y5 E0 B# leither 21-hydroxylase deficiency or 11-β hydroxylase
$ z5 t5 j' N" C& o& Ndeficiency. Those diagnoses were excluded by find-& t' y+ u- M$ f0 W5 k% a) ]" ~ r
ing the normal level of adrenal steroids.% _ v k& j* _! t t ^) T
The diagnosis of exogenous androgens was strongly3 P7 b/ v' a7 [2 J1 q
suspected in a follow-up visit after 4 months because
; Q, S5 Q( ~2 @the physical examination revealed the complete disap-8 `% d/ ~0 ?8 u. V/ T' T4 o3 N
pearance of pubic hair, normal growth velocity, and' p" [* L& q8 N8 ~ u0 p$ ~
decreased erections. The father admitted using a testos-
, s& q; [) {' I- r. U: zterone gel, which he concealed at first visit. He was
- D/ ~& Q& R) Gusing it rather frequently, twice a day. The Physicians’$ c8 N1 t5 c+ X! y
Desk Reference, or package insert of this product, gel or
3 h0 _( r3 k* E% R' |1 pcream, cautions about dermal testosterone transfer to
+ ~& i! P& w( [$ @" f: Vunprotected females through direct skin exposure.
$ g$ ~4 e8 ?( v5 cSerum testosterone level was found to be 2 times the
+ U2 X. Y. o Q( ?- ?6 K5 Nbaseline value in those females who were exposed to& X, l! j5 y5 g% K. z6 r) L
even 15 minutes of direct skin contact with their male
3 O: T4 w! A2 | S4 }& w! E- o. S; Y Q& |partners.6 However, when a shirt covered the applica-2 T/ x/ H/ `/ Y9 }2 b
tion site, this testosterone transfer was prevented.! ]7 g# T. Q" A/ n1 `
Our patient’s testosterone level was 60 ng/mL,
9 i. J2 ?, S+ A6 m5 pwhich was clearly high. Some studies suggest that
* H7 n0 p f* o3 X# }! o( \dermal conversion of testosterone to dihydrotestos-
1 N. T5 c) U1 Z$ [- o$ _9 oterone, which is a more potent metabolite, is more
7 J, m/ R1 A7 S8 O5 nactive in young children exposed to testosterone
- }5 O0 E' h: G3 N7 ~) pexogenously7; however, we did not measure a dihy-
( Y5 c# p7 W; [& n% Fdrotestosterone level in our patient. In addition to
7 i+ r; z, S: q( G! |1 w1 i+ Vvirilization, exposure to exogenous testosterone in
; b6 C8 K6 K$ v2 [children results in an increase in growth velocity and0 d; n! G) e8 D- K; U
advanced bone age, as seen in our patient.8 [3 c- F( R( X. \! C
The long-term effect of androgen exposure during
* t. z! V( S" l7 J( Jearly childhood on pubertal development and final/ R; \( n; s8 S. O5 P
adult height are not fully known and always remain
# F8 M' F. I( d" Z2 @% @a concern. Children treated with short-term testos-
8 N; r( j2 g, y3 {4 c+ g% @, Q2 yterone injection or topical androgen may exhibit some* g% x O5 H- _' z1 q3 [9 h
acceleration of the skeletal maturation; however, after
7 a) z" ^" H9 H$ ncessation of treatment, the rate of bone maturation
4 h: q- l) X2 wdecelerates and gradually returns to normal.8,9
9 s( w C/ c3 ^+ QThere are conflicting reports and controversy1 d, M# }2 n" T' N3 @ O2 Z
over the effect of early androgen exposure on adult" w4 }+ {- w j9 e% I
penile length.10,11 Some reports suggest subnormal
! A; ? o, e. ~" padult penile length, apparently because of downreg-
; `$ p- h0 l3 k: s( Eulation of androgen receptor number.10,12 However,& X1 ?( K O9 D
Sutherland et al13 did not find a correlation between
8 A, J Q* j) p7 Schildhood testosterone exposure and reduced adult% s$ L2 O$ O0 h) ~' P0 Q
penile length in clinical studies.
9 s& C: X1 ?1 G% _: c! hNonetheless, we do not believe our patient is. W' k9 i( d! }
going to experience any of the untoward effects from0 H/ c$ I, M- O/ d; n
testosterone exposure as mentioned earlier because
+ K% G% a2 Q- ]0 M7 \the exposure was not for a prolonged period of time.
6 E- S# u0 Q9 ^/ p& N# {4 YAlthough the bone age was advanced at the time of7 l+ M M# K! `. d
diagnosis, the child had a normal growth velocity at7 `+ l6 F5 @0 l+ o
the follow-up visit. It is hoped that his final adult) |8 {$ \5 p2 s; I; U
height will not be affected.- ?4 s2 [% y( V7 I
Although rarely reported, the widespread avail-1 h2 c1 K8 @ S; f* b* o
ability of androgen products in our society may
6 O) H) {7 {& \0 g# i" j7 mindeed cause more virilization in male or female. z) O5 y. v; h9 D7 @$ ?
children than one would realize. Exposure to andro-
! G- ?! Q, j. R3 V( f, ~& l+ Jgen products must be considered and specific ques-# k3 r7 g& t1 y$ X q5 i; p3 D# l* H
tioning about the use of a testosterone product or1 {' Z: r+ Y2 M# M( S. A# D! @0 O
gel should be asked of the family members during
% d( r3 ~+ v7 n3 i$ i: a' Athe evaluation of any children who present with vir-7 f& t% Q; T8 V! q. [* {; T
ilization or peripheral precocious puberty. The diag-3 [" S* A/ b8 O x) A% m
nosis can be established by just a few tests and by
2 S9 o6 b1 t; Sappropriate history. The inability to obtain such a4 u3 R4 R- J- D0 S" b) m
history, or failure to ask the specific questions, may$ ^+ P: Z; ~7 ~1 H/ Z8 I% ~
result in extensive, unnecessary, and expensive
5 z5 w- c- p( |investigation. The primary care physician should be
+ ]0 [* j, K3 V m; z W+ L+ t' Kaware of this fact, because most of these children
% S% V1 X7 f% K2 [may initially present in their practice. The Physicians’
; c4 ~. L8 @+ S* B$ ~: EDesk Reference and package insert should also put a
' _' `6 h: X% d4 cwarning about the virilizing effect on a male or- Q1 `5 ?# u' o* L/ `
female child who might come in contact with some-/ d* x3 w% l0 w8 R" }
one using any of these products.
" I% }- Z9 L; j4 z0 c! `0 HReferences' }/ n c p( v% j# s+ G2 `7 v
1. Styne DM. The testes: disorder of sexual differentiation% G0 D1 b. l) Y- R. V. D% J
and puberty in the male. In: Sperling MA, ed. Pediatric) B' ? |4 Z0 ?3 w* J5 `
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
7 @6 G& p# C) u+ j2002: 565-628.
+ M4 P$ A& k1 I8 w! f2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
4 o4 T6 T2 q8 @7 upuberty in children with tumours of the suprasellar pineal
1 V: B. T. \: C+ Vat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, O& F+ g# a0 T* e7 Y/ y4 hTopical Testosterone Exposure / Bhowmick et al 543
& I+ z1 C/ L9 Xareas: organic central precocious puberty. Acta Paediatr.2 \3 a: G+ N: k' m* K9 R
2001;90:751-756.
% X+ ?/ w2 K! @; a1 D4 x7 O7 A3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.8 Q2 M: O! d+ j) A; b7 p
Pediatric Endocrinology. 4th ed. New York, NY: Marcel) T/ D4 x% `$ ?! N$ v* Z$ t# V
Dekker Inc; 2003:211-238., j3 J. u8 r8 k* s
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
" M. M9 q- I) l7 ]) zdevelopment in a two-year-old boy induced by topical9 K( \/ ?, S2 q* b/ X
exposure to testosterone. Pediatrics. 1999;104:e23.4 X' R$ S9 r/ N
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
v7 q5 k& k% K% g) iSkeletal Development of the Hand and Wrist. 2nd ed.4 }" B4 A0 C& e( X* Z
Stanford, CA: Stanford University Press; 1959.
2 h* y! s6 X$ e9 q6. Physicians’ Desk Reference. Androgel 1% testosterone,4 O1 Q8 W2 e7 z+ c! t: a
Unimed Pharmaceutical Inc. Montvale, NJ: Medical( D2 o/ A& _+ E" F+ M
Economics Company, Inc; 2004:3239-3241.
; R0 w( s; n0 B( _7. Klugo RC, Cerny JC. Response of micropenis to topical
% O/ e, h# K1 f) Z$ W0 W1 jtestosterone and gonadotropin. J Urol. 1978;119:9 y, y. O- p" g( l
667-668.
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