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is a significant concern for physicians. Central
$ z/ I% H1 C* v4 @+ Q' {* qprecocious puberty (CPP), which is mediated
6 p+ x6 ] H8 G% V/ E2 z. Qthrough the hypothalamic pituitary gonadal axis, has
. X/ C0 a9 {2 w8 h3 e& x" q- J3 Ca higher incidence of organic central nervous system6 X1 Z7 o* `( N; K$ L6 J- }" X
lesions in boys.1,2 Virilization in boys, as manifested
+ C0 J; e0 Y$ g1 [by enlargement of the penis, development of pubic" t' }1 Z7 ?+ q2 O+ Q2 ~
hair, and facial acne without enlargement of testi-
+ \, r) }4 x" H8 h1 ~cles, suggests peripheral or pseudopuberty.1-3 We/ V: T* O ~0 R% ~) K S
report a 16-month-old boy who presented with the+ o8 H5 v* J( H" ^
enlargement of the phallus and pubic hair develop-
& o g# A. ?0 v1 b* P) R/ s3 e! }ment without testicular enlargement, which was due
1 E6 X, D3 t# C$ f3 Uto the unintentional exposure to androgen gel used by! i3 B+ T& p J1 F6 H+ l! o a
the father. The family initially concealed this infor-$ P# |7 A3 D: C# z; P9 F1 n
mation, resulting in an extensive work-up for this. _: E. P$ L& A1 U% D$ r
child. Given the widespread and easy availability of' |% f6 O, p5 U4 O& J0 L
testosterone gel and cream, we believe this is proba-
2 Z2 L* e: s2 v6 Pbly more common than the rare case report in the
) ]5 h$ H% ?; C7 P0 s: yliterature.4
& B D i3 J7 M7 ?: _) m9 mPatient Report
F; w: R; o( a: j! tA 16-month-old white child was referred to the9 z6 Q0 B0 _: M0 k
endocrine clinic by his pediatrician with the concern% D# v: f7 e8 C! n" D8 S" ~
of early sexual development. His mother noticed V: v" ?1 x, ?
light colored pubic hair development when he was
4 P+ T1 m* [+ H$ }) @2 cFrom the 1Division of Pediatric Endocrinology, 2University of
1 }- t) M! y5 D* USouth Alabama Medical Center, Mobile, Alabama.
, |7 @7 R, [; n- z# L* [ @Address correspondence to: Samar K. Bhowmick, MD, FACE,$ [/ Y1 V2 F6 G
Professor of Pediatrics, University of South Alabama, College of( j- L6 N7 l, m4 G
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
1 l' s4 G* G# _3 N8 j+ @. pe-mail: [email protected].
! X) T' \/ m$ ?% I, dabout 6 to 7 months old, which progressively became7 p" N3 A# }7 q+ R' c4 D3 s
darker. She was also concerned about the enlarge-
0 U" @6 q/ O0 Zment of his penis and frequent erections. The child
+ ^$ C& z" R# Xwas the product of a full-term normal delivery, with) J3 q. T- \' L6 o- ?, ~
a birth weight of 7 lb 14 oz, and birth length of
! U. F2 \$ [# B0 ]" f$ K20 inches. He was breast-fed throughout the first year" r% |* }0 Q( i' I) i
of life and was still receiving breast milk along with# m% s) Q/ ]8 ?7 C
solid food. He had no hospitalizations or surgery,
! w- t: _! M* d: V* gand his psychosocial and psychomotor development
" T* ?( V' S) _$ cwas age appropriate.8 j7 ~( Z" V9 w f
The family history was remarkable for the father,
5 n# ~) P, C' F, M! Owho was diagnosed with hypothyroidism at age 16,/ b2 Y. O; h& W+ R4 e
which was treated with thyroxine. The father’s8 D4 S! }) c8 N! a* T. T8 F# E( H, G; R
height was 6 feet, and he went through a somewhat; P' I& v: T0 T( C& M$ Y# A
early puberty and had stopped growing by age 14.
( {4 g/ H% Z3 V' M1 eThe father denied taking any other medication. The0 X) c5 X. D0 W+ [% }) h
child’s mother was in good health. Her menarche O& x2 O) D3 U% U2 x" j% H$ i1 ?
was at 11 years of age, and her height was at 5 feet) c* Y A1 L4 O1 j7 D, ?
5 inches. There was no other family history of pre-
, V1 W' X+ r! N0 H8 dcocious sexual development in the first-degree rela-9 w; `# h# v, Y9 Y* p
tives. There were no siblings., L- j% R: o( p8 |5 `
Physical Examination. y: x( Y' x0 p
The physical examination revealed a very active,
2 }, R4 a/ |$ t% ? |/ t+ |, Iplayful, and healthy boy. The vital signs documented
& i" M2 s. S, m( R+ d0 E5 Va blood pressure of 85/50 mm Hg, his length was
+ {( c5 E8 x. I+ o/ ~) K! l90 cm (>97th percentile), and his weight was 14.4 kg3 E! g; y1 k# O- H) p4 j8 E+ q" N: X
(also >97th percentile). The observed yearly growth
3 l6 Z2 w K, I0 l8 Q+ k) qvelocity was 30 cm (12 inches). The examination of
% v" V- P9 R5 Xthe neck revealed no thyroid enlargement.6 ~ ^& b E$ I, B! u7 g
The genitourinary examination was remarkable for) ^$ [ }# ], \
enlargement of the penis, with a stretched length of. J `5 Y6 i; A; M \: k7 F
8 cm and a width of 2 cm. The glans penis was very well
& Z$ r- J* X6 Ddeveloped. The pubic hair was Tanner II, mostly around( g# t" L7 h+ \" U
540
3 ~% |; {& Y7 E! Aat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ Z5 F Q S" }: ^3 j# ^" v8 Q' s) athe base of the phallus and was dark and curled. The. e+ l9 ~6 b8 h8 o$ o8 u& ]
testicular volume was prepubertal at 2 mL each.
& g3 t# e; E* F% `8 O/ RThe skin was moist and smooth and somewhat
8 |+ b! {" P6 ~/ G# \( p2 yoily. No axillary hair was noted. There were no% j8 ^" x8 L# [, h1 a
abnormal skin pigmentations or café-au-lait spots.
* U( j1 O8 w: U, BNeurologic evaluation showed deep tendon reflex 2+5 r" P4 {1 G* R3 y, Z4 j
bilateral and symmetrical. There was no suggestion
- z& G) a$ x) \3 tof papilledema.7 B0 l _- `- r( E+ M( f
Laboratory Evaluation
4 k2 W$ B3 {: G" P' T$ [' VThe bone age was consistent with 28 months by& Q8 t7 |2 i; a( }6 r
using the standard of Greulich and Pyle at a chrono-
, Y0 F/ E" L8 t3 e0 ?4 F" dlogic age of 16 months (advanced).5 Chromosomal# f. l% _; d* t; u( \+ B
karyotype was 46XY. The thyroid function test0 A/ H8 H5 t0 y
showed a free T4 of 1.69 ng/dL, and thyroid stimu-* O: G! j7 x& J: X+ J8 G
lating hormone level was 1.3 µIU/mL (both normal).+ T# i+ N! R! J5 w' F: q/ [, f
The concentrations of serum electrolytes, blood
6 ]- A+ T( V e, \1 v( e* }urea nitrogen, creatinine, and calcium all were9 @# E# N( M/ ?' I- n6 X
within normal range for his age. The concentration
; u: P+ F1 _1 [" x9 B5 Zof serum 17-hydroxyprogesterone was 16 ng/dL
! C& g) r& b4 @+ }( X6 a(normal, 3 to 90 ng/dL), androstenedione was 207 J) R! B/ g, K( c. E
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
8 F8 T+ I1 f' ?terone was 38 ng/dL (normal, 50 to 760 ng/dL)," ]: t& i" ^& ~" F! Q6 G
desoxycorticosterone was 4.3 ng/dL (normal, 7 to" S) f2 c8 E" ^3 [% J& V
49ng/dL), 11-desoxycortisol (specific compound S)
! _1 {4 G" V0 y* i$ i6 x* Mwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-# J2 S5 f) @$ r5 Z/ `/ M) W
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
' Q/ W* E) E, v& N* ntestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
3 y6 a' d+ p: e9 W/ Y; c8 M2 |and β-human chorionic gonadotropin was less than" b" S1 u0 x5 Y
5 mIU/mL (normal <5 mIU/mL). Serum follicular
. W G2 b; Z: ]$ J* I) v. r2 pstimulating hormone and leuteinizing hormone
) u0 M! @7 n% t, V+ ]9 c$ @4 t7 x rconcentrations were less than 0.05 mIU/mL# W2 T% J% O; H# U# _
(prepubertal).
6 @! D u6 ^. Z6 b7 [; Y4 t6 hThe parents were notified about the laboratory
! g* h. a+ s, H3 K6 \8 uresults and were informed that all of the tests were4 ~- @# n/ T" H. U, K
normal except the testosterone level was high. The8 x. U" h& E" R9 A( w+ i
follow-up visit was arranged within a few weeks to/ h0 p" W# z/ q0 \6 T! u0 @
obtain testicular and abdominal sonograms; how-" S) |4 D) ]0 L/ N
ever, the family did not return for 4 months.9 Z% n! z2 m5 l* V7 t
Physical examination at this time revealed that the* [) x; l6 G, Z) q8 I! S
child had grown 2.5 cm in 4 months and had gained
4 F8 C1 V$ \3 o( @8 B9 f2 F2 kg of weight. Physical examination remained8 o g+ P6 y; [
unchanged. Surprisingly, the pubic hair almost com-
0 c( s. |9 E) r! Fpletely disappeared except for a few vellous hairs at0 [ R$ @8 ^0 H2 ^4 U
the base of the phallus. Testicular volume was still 24 z+ w8 N' F) K0 u; W1 G8 F9 K9 h5 H
mL, and the size of the penis remained unchanged.
! K# I1 e; T4 M5 i/ P) R. ZThe mother also said that the boy was no longer hav-' Y! E# l: B1 u$ ]/ e. A
ing frequent erections.
7 C, J0 n/ J2 M# p% R/ G8 iBoth parents were again questioned about use of
) v; N# }" i+ ~ xany ointment/creams that they may have applied to
7 R* p& i D4 x: I7 \ e% Athe child’s skin. This time the father admitted the1 w9 H% K5 }4 \6 I S
Topical Testosterone Exposure / Bhowmick et al 541$ r( h b5 J0 K: O; W
use of testosterone gel twice daily that he was apply-
/ `7 x) V" r J! P& aing over his own shoulders, chest, and back area for
4 v' @2 ^# M* p1 h, e. W. X H7 ha year. The father also revealed he was embarrassed
4 {' z M7 A# L* Ato disclose that he was using a testosterone gel pre-( _" U% \: a4 [8 j( `
scribed by his family physician for decreased libido
, g& z; c( {# t0 ssecondary to depression.: H& l6 M6 ~+ z# s& N! p9 b
The child slept in the same bed with parents.0 m! b2 \' ]! F6 N2 x7 d, t8 ]
The father would hug the baby and hold him on his
& ~$ ?; x B( g- {chest for a considerable period of time, causing sig- e7 Q9 @+ e3 y7 o% |3 t
nificant bare skin contact between baby and father.8 R# }! \! S0 z5 T; m
The father also admitted that after the phone call,
( W& v1 r0 E- z# B" P7 fwhen he learned the testosterone level in the baby$ S+ [) R5 `5 b0 Y3 }+ a; ]9 }
was high, he then read the product information% {8 n$ A) Y. m5 H! w
packet and concluded that it was most likely the rea-
0 j& d* T* @7 f" fson for the child’s virilization. At that time, they- N4 f$ m8 N ^- }
decided to put the baby in a separate bed, and the
1 B0 w& v* r6 w. G+ G8 l0 xfather was not hugging him with bare skin and had! O$ D( R) Z$ a# W
been using protective clothing. A repeat testosterone
( b7 v7 S! X$ t' U6 i- x1 Q1 Etest was ordered, but the family did not go to the
; k5 M; _" M) y" ]7 tlaboratory to obtain the test.
; p4 ]2 P/ l3 y% z( C5 eDiscussion* l/ W; d0 D7 Q1 g2 [3 P- i* U
Precocious puberty in boys is defined as secondary3 H3 ]6 m7 Y7 v& U# \2 M- u1 s
sexual development before 9 years of age.1,45 n" j8 }$ j5 }0 z! \- |# `! s
Precocious puberty is termed as central (true) when
) H* `8 g0 Y, Fit is caused by the premature activation of hypo-
# t/ f0 O; s7 \0 f# hthalamic pituitary gonadal axis. CPP is more com-
5 j( ~# v. ~- h9 J- B7 l/ Gmon in girls than in boys.1,3 Most boys with CPP
{* V- ^/ R- d L' `# Emay have a central nervous system lesion that is5 W3 N, y! \" }& v
responsible for the early activation of the hypothal-; o2 r/ \) {# z' o
amic pituitary gonadal axis.1-3 Thus, greater empha-- t( b, N1 p5 f4 b, O3 K' P3 B4 h9 y
sis has been given to neuroradiologic imaging in
+ y i4 b4 v% G+ P9 R6 V) N4 m+ Xboys with precocious puberty. In addition to viril-
- ]4 v+ {4 k5 `; Jization, the clinical hallmark of CPP is the symmet-5 W$ ^7 M5 p0 D4 n
rical testicular growth secondary to stimulation by) E1 K0 u+ R& H4 `
gonadotropins.1,3& {2 {0 Z) T& w$ h7 \% D! |
Gonadotropin-independent peripheral preco-
) D- t5 K& Q$ a! K* W- x! Acious puberty in boys also results from inappropriate
9 X2 f5 T3 g g7 K0 iandrogenic stimulation from either endogenous or
" d7 h( K5 L7 L/ q4 Bexogenous sources, nonpituitary gonadotropin stim-
9 D8 D: x- z6 W6 H: b3 b3 wulation, and rare activating mutations.3 Virilizing+ o- E6 P- U* J+ u# H, ?3 n2 }" U3 ^
congenital adrenal hyperplasia producing excessive0 U0 m4 E" f: W) g
adrenal androgens is a common cause of precocious
' e* a, |4 P( Z% M- ypuberty in boys.3,46 I5 |. r+ C1 X4 O
The most common form of congenital adrenal0 |+ L/ H) B8 `
hyperplasia is the 21-hydroxylase enzyme deficiency.. C$ J8 {3 q S4 ?6 n
The 11-β hydroxylase deficiency may also result in
8 I! l* [, u- J7 Oexcessive adrenal androgen production, and rarely,
) l: X! T+ J/ ~+ tan adrenal tumor may also cause adrenal androgen
7 {1 z; }7 c5 j9 e( texcess.1,3' s M6 Z: a6 y! Y
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. X9 L0 d; u& X! S0 ?4 O& m( |' w1 R9 D542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
; o- e* E" ^! _* hA unique entity of male-limited gonadotropin-
0 K% ?5 f; g7 S aindependent precocious puberty, which is also known
1 v" Z% r. |% Pas testotoxicosis, may cause precocious puberty at a
/ v* `# C+ ]: Q3 I8 t( q- {very young age. The physical findings in these boys
' H/ v) }. L! D/ ~3 e' ]! A awith this disorder are full pubertal development,& Q( b' d! e+ j4 t1 ]
including bilateral testicular growth, similar to boys/ l1 [ j9 o1 p2 t5 E
with CPP. The gonadotropin levels in this disorder
3 i# w# o! }/ `) n" A" jare suppressed to prepubertal levels and do not show5 v, ?' o/ ~ I+ H
pubertal response of gonadotropin after gonadotropin-
# F* G( s U0 O0 d# D& s2 n( areleasing hormone stimulation. This is a sex-linked" A% Y$ ?' L" ?$ o- ]1 D0 g% V
autosomal dominant disorder that affects only T8 }6 F1 [6 B9 [' O% C1 N* E' D
males; therefore, other male members of the family
+ e* ^- r$ B7 \% G0 I, Nmay have similar precocious puberty.30 l* x% L4 @6 ~& c5 H
In our patient, physical examination was incon-1 ~6 {) ^( {8 P, c
sistent with true precocious puberty since his testi-* K: m1 u4 [, X
cles were prepubertal in size. However, testotoxicosis
& l+ g& \; m0 Z9 k2 F7 V2 t- v- K2 M( lwas in the differential diagnosis because his father0 v8 |* @0 W$ t- [! d! B- u% H/ \: J* _
started puberty somewhat early, and occasionally,- I$ s+ V) S i. Q3 O
testicular enlargement is not that evident in the( e6 D; x% Y* g9 u* b$ |
beginning of this process.1 In the absence of a neg-9 U' k; f8 M8 Y( z8 e
ative initial history of androgen exposure, our8 m9 C& p) H8 n& S* B- V# e
biggest concern was virilizing adrenal hyperplasia,
4 z# u$ G% m5 R6 ^' }- p' beither 21-hydroxylase deficiency or 11-β hydroxylase% `2 w+ V! K* Y, e/ T, N
deficiency. Those diagnoses were excluded by find-
( g9 \2 H: y0 E+ j' `& c0 Xing the normal level of adrenal steroids.
3 n' u, S6 C; R( _0 o0 }The diagnosis of exogenous androgens was strongly4 y c7 Z$ x% c. X. V" N
suspected in a follow-up visit after 4 months because
+ D# g# n, H! _the physical examination revealed the complete disap-- _6 V2 n$ y# S/ g4 ]
pearance of pubic hair, normal growth velocity, and
: H/ f* y* K* R. qdecreased erections. The father admitted using a testos-9 W3 L8 M' n' Z, `# l
terone gel, which he concealed at first visit. He was a! {2 M9 Y, F
using it rather frequently, twice a day. The Physicians’9 K) x! B& w' U0 s& [
Desk Reference, or package insert of this product, gel or
# Z2 y' l' X% y# I) dcream, cautions about dermal testosterone transfer to
% z& J3 j9 N3 b" E% c+ m C; { M9 Yunprotected females through direct skin exposure.- J [7 t; H' s: X
Serum testosterone level was found to be 2 times the
+ I9 t2 n* v4 W" h4 `: O/ bbaseline value in those females who were exposed to
9 p% p i- P, ?4 N* m5 L! u8 Yeven 15 minutes of direct skin contact with their male
/ _! W: P! y3 d" s8 R, ~partners.6 However, when a shirt covered the applica-: o, s7 p1 t8 X, F, M8 |
tion site, this testosterone transfer was prevented." C+ r& U$ H7 m% z( Y
Our patient’s testosterone level was 60 ng/mL,3 k4 I" l9 L# u# W: J- H
which was clearly high. Some studies suggest that
/ S A! u1 h2 Q0 m4 d( ]: Sdermal conversion of testosterone to dihydrotestos-& [+ [: B% }$ S
terone, which is a more potent metabolite, is more: B# p( O- `0 ?, Y b. f
active in young children exposed to testosterone
+ a# o6 U( |% g, M6 N% j+ q" xexogenously7; however, we did not measure a dihy-
" D! e! x g/ P) bdrotestosterone level in our patient. In addition to
2 ~# P/ n3 c, s( I, }: Ivirilization, exposure to exogenous testosterone in
9 K: }" B, W1 Q5 T! k# v5 b8 B p5 ~. c( W+ xchildren results in an increase in growth velocity and# O. q/ B( ?2 L" ^% u# ]- V, ^- E
advanced bone age, as seen in our patient.9 v C" N1 [, t: |' Y, J, p+ V
The long-term effect of androgen exposure during
2 Z( }1 J( i' @early childhood on pubertal development and final
3 O. q0 a; I; J" y. j" B# jadult height are not fully known and always remain! ^5 @# A' z0 y7 Q+ i' T/ h
a concern. Children treated with short-term testos-- w& m- H5 \7 t$ x! s7 r
terone injection or topical androgen may exhibit some& W) y! [1 |/ V6 O8 A& t- V
acceleration of the skeletal maturation; however, after) \2 G; m2 R' h% q( S7 G! y' C
cessation of treatment, the rate of bone maturation4 l. n4 N( u! I4 w( d$ z
decelerates and gradually returns to normal.8,9
/ _1 K4 C- Z' x+ G+ o- K' ]There are conflicting reports and controversy) v$ O g$ F; ^0 O3 x
over the effect of early androgen exposure on adult
, b0 X: U( ~; n& t7 u0 mpenile length.10,11 Some reports suggest subnormal- E& y. b# z( e6 f* h: N
adult penile length, apparently because of downreg-" _- Q" G5 c9 f
ulation of androgen receptor number.10,12 However,
# m h3 Y6 L/ ~) zSutherland et al13 did not find a correlation between( |6 k8 a/ E" [
childhood testosterone exposure and reduced adult' w* ?8 P$ s& k4 q K3 V
penile length in clinical studies.
/ F$ A1 T0 V2 w4 rNonetheless, we do not believe our patient is Z& C! ~1 d+ F) C6 ~/ M6 Z
going to experience any of the untoward effects from3 i) G4 x3 R! k- I' v
testosterone exposure as mentioned earlier because
* \# d. X: @, mthe exposure was not for a prolonged period of time.: r5 T: I- F! G Y- E2 k- }8 W9 \' Y. w
Although the bone age was advanced at the time of; P6 K0 A4 n; F) N$ K" B& i
diagnosis, the child had a normal growth velocity at% I+ J# b7 s5 B) @
the follow-up visit. It is hoped that his final adult( N' _$ g8 N) K6 J3 T
height will not be affected.* D; E1 n# I# K$ M0 o
Although rarely reported, the widespread avail-2 s( i2 `9 l1 {& L) p/ z2 z2 @
ability of androgen products in our society may( c1 \" h2 r7 a* J5 M+ w. Z Q
indeed cause more virilization in male or female
$ V8 \& }$ Z. e# F; D o3 tchildren than one would realize. Exposure to andro-1 B" K& Y6 f i+ {
gen products must be considered and specific ques-) G- {5 z' v0 p9 ?. h
tioning about the use of a testosterone product or8 L; d( b& V- T \6 X1 d( a3 ]
gel should be asked of the family members during
* k4 g, O: }( w1 D) h5 d: A) F+ [the evaluation of any children who present with vir-! ]) M; V, B4 J3 I
ilization or peripheral precocious puberty. The diag-
+ j0 u8 ?! t. W9 Y/ N4 H5 d! V4 Lnosis can be established by just a few tests and by
9 f! Y5 L3 e9 ?- m0 f' Aappropriate history. The inability to obtain such a$ I/ f* \+ p" ]4 l/ c: G
history, or failure to ask the specific questions, may
( K) L1 ]1 l @" @( presult in extensive, unnecessary, and expensive/ L; E: S$ H& o
investigation. The primary care physician should be
& Y( ^( w, N' }; F3 `# eaware of this fact, because most of these children
7 F" G! l4 P% W8 Nmay initially present in their practice. The Physicians’7 e/ Q; l: ~$ k) u! k
Desk Reference and package insert should also put a/ a# c! G: e, s
warning about the virilizing effect on a male or
( N- r) a# _% L, s) Q5 x5 j! Xfemale child who might come in contact with some-8 ?2 Z$ R: Z5 c
one using any of these products.
: {) G1 [, T6 q. e# L, sReferences
3 ~- a) u( Q' Y8 X1. Styne DM. The testes: disorder of sexual differentiation
) V' Z4 B0 t% P4 G% N/ d0 Band puberty in the male. In: Sperling MA, ed. Pediatric7 P% q0 |. `1 z b; K' x
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;+ _8 S& }% l. O b X: ^
2002: 565-628.2 t+ l0 b( e1 b
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious/ [7 n* h) ^. w+ q A
puberty in children with tumours of the suprasellar pineal
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: H5 M6 Y+ O( P1 w9 h" ^Topical Testosterone Exposure / Bhowmick et al 543
5 S7 y6 P: ~: B# V2 J( b% W; j `areas: organic central precocious puberty. Acta Paediatr.
5 U+ s& b3 X9 A9 H+ b2001;90:751-756.9 R3 ?+ D3 ]. Y, V
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.4 L) b5 t4 B+ h
Pediatric Endocrinology. 4th ed. New York, NY: Marcel- J3 t8 a2 w) z2 T
Dekker Inc; 2003:211-238.
, N4 `* w/ F$ n- d9 W3 k! f- q4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
8 R1 N( u5 L' Rdevelopment in a two-year-old boy induced by topical7 g @* ?# {/ v% ^1 K6 O: I
exposure to testosterone. Pediatrics. 1999;104:e23.
1 B/ E; e7 S6 U9 C. e5. Greulich WW, Pyle SI, eds. Radiographic Atlas of( t8 q# U# t( J+ J' U4 [& E4 O
Skeletal Development of the Hand and Wrist. 2nd ed.- x* z4 T) W5 `- U, w4 r* q+ m
Stanford, CA: Stanford University Press; 1959.0 X9 T9 _4 h3 [2 d9 S
6. Physicians’ Desk Reference. Androgel 1% testosterone,
% Y, w6 H; q3 X4 _+ R2 g1 dUnimed Pharmaceutical Inc. Montvale, NJ: Medical6 b! v' a1 k. n- z+ P
Economics Company, Inc; 2004:3239-3241.
" V2 {# _5 O& C" G& ~! ]9 l7. Klugo RC, Cerny JC. Response of micropenis to topical
+ @6 L' C$ p& ]9 Z+ T# T3 _2 gtestosterone and gonadotropin. J Urol. 1978;119:
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