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is a significant concern for physicians. Central
$ w' O4 r4 O& [. C2 Mprecocious puberty (CPP), which is mediated* Y& Z! I. e: a
through the hypothalamic pituitary gonadal axis, has
6 s, |% d! }. Y% {* X' }% |. @" z4 Ta higher incidence of organic central nervous system' C6 F+ N3 Q$ H9 |5 u
lesions in boys.1,2 Virilization in boys, as manifested
: u2 ?2 M) P- U0 p4 B3 hby enlargement of the penis, development of pubic
?8 _5 B1 [1 z7 Dhair, and facial acne without enlargement of testi-! ?* \/ u( b# h1 @/ C3 Q; R
cles, suggests peripheral or pseudopuberty.1-3 We9 j. [ d; E* X8 {) M7 z
report a 16-month-old boy who presented with the
; d+ D( h U9 i, o5 Denlargement of the phallus and pubic hair develop-* x. l# t6 k g
ment without testicular enlargement, which was due
) h" r1 i, P' N8 ^+ u, N9 Kto the unintentional exposure to androgen gel used by
$ _. p+ D. e( t6 vthe father. The family initially concealed this infor-
2 c2 z9 ]$ N: w7 Emation, resulting in an extensive work-up for this/ U5 g% H1 N. m7 f3 q
child. Given the widespread and easy availability of
9 A! w4 O/ V+ v! wtestosterone gel and cream, we believe this is proba-1 K* s3 r- i; r% D7 M
bly more common than the rare case report in the
, z7 e6 ~, Q9 b8 k; k9 M1 l/ n" }literature.4
7 U% \0 \) ?0 XPatient Report
. D' G3 z4 P, ]- a! k9 T4 wA 16-month-old white child was referred to the
& D/ d& v$ q2 V5 q2 B }4 Vendocrine clinic by his pediatrician with the concern2 {0 f# }: m& x7 D
of early sexual development. His mother noticed% O3 o3 E! `: J* E' b( J5 I& O
light colored pubic hair development when he was
/ Y. f4 |6 ?0 a" EFrom the 1Division of Pediatric Endocrinology, 2University of' T/ |, g d5 V& ^5 D/ I
South Alabama Medical Center, Mobile, Alabama.6 \1 n8 o: @% }
Address correspondence to: Samar K. Bhowmick, MD, FACE," e( M% B/ C7 b1 U+ a
Professor of Pediatrics, University of South Alabama, College of
D2 U i* W! M# `Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' h9 Z5 [5 X4 F" u/ a
e-mail: [email protected].# ?5 y- T, d5 p, h
about 6 to 7 months old, which progressively became9 i3 w V7 M" o7 |) E
darker. She was also concerned about the enlarge-
& X* {: J2 ]3 J$ A* bment of his penis and frequent erections. The child& L2 R+ m1 U' D, D) ]
was the product of a full-term normal delivery, with& i. K- n0 }) J
a birth weight of 7 lb 14 oz, and birth length of
4 R4 |) w* s9 H* z# T20 inches. He was breast-fed throughout the first year1 F2 B9 Z/ G0 H2 `1 Y
of life and was still receiving breast milk along with
0 w4 C% R" _" H) ^3 @/ l& nsolid food. He had no hospitalizations or surgery,
+ k5 g0 m/ \; V3 U" Band his psychosocial and psychomotor development
. R( A9 U/ F. d! ewas age appropriate.
1 J$ a7 B$ g5 r ]The family history was remarkable for the father,& t/ T1 V+ \ w: [% ~7 k9 W
who was diagnosed with hypothyroidism at age 16,* o) D" ?2 x1 p; A' n6 @
which was treated with thyroxine. The father’s
5 k( x! D8 y( C) p, Theight was 6 feet, and he went through a somewhat
4 i" T3 {: q9 N4 I# v1 Oearly puberty and had stopped growing by age 14.
H2 I/ {* x/ ~6 N4 I% r, N XThe father denied taking any other medication. The6 D1 o, E$ s3 w* n$ O" e
child’s mother was in good health. Her menarche( \" J6 i0 V2 T0 b* x
was at 11 years of age, and her height was at 5 feet
4 j% s e e0 Q( @' H- Q( Y5 inches. There was no other family history of pre-
9 ?: c( b# `: W5 S' j. \6 Y( S% Bcocious sexual development in the first-degree rela-, F% r9 x ]7 s0 j! W
tives. There were no siblings.% r' k Y2 i& [
Physical Examination
$ P( c) S2 h4 {8 |The physical examination revealed a very active,
& Z/ o Z( I: f! ^4 gplayful, and healthy boy. The vital signs documented6 T5 }! O* X7 q' J7 A0 P
a blood pressure of 85/50 mm Hg, his length was
2 ~) s2 h* {( z0 w m90 cm (>97th percentile), and his weight was 14.4 kg
* Q, A# G4 V# J! q6 X O(also >97th percentile). The observed yearly growth
: ~2 J9 R" \6 E9 Evelocity was 30 cm (12 inches). The examination of0 f' ?; A& f) _6 _6 r0 `. k5 G
the neck revealed no thyroid enlargement.+ S6 u; V- j# |9 A1 A! o
The genitourinary examination was remarkable for
X1 P$ x0 }% b2 i G( T5 Q6 i9 @enlargement of the penis, with a stretched length of
% f: @3 ]0 e- k2 [; Z) Z( `8 cm and a width of 2 cm. The glans penis was very well' m; K( c; U* s5 O' d
developed. The pubic hair was Tanner II, mostly around
$ @' z+ r3 {3 v- }( S8 n; `540. r+ e" o( H0 [) @; _
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' y1 B" b, _. c( t
the base of the phallus and was dark and curled. The
Q2 J3 ^! f1 i8 O( G: htesticular volume was prepubertal at 2 mL each.: ^' n; X' E) ~& e9 a( _
The skin was moist and smooth and somewhat1 d/ a, `0 _0 b8 i6 S
oily. No axillary hair was noted. There were no
; h4 _0 p$ u2 {0 r$ L" D, i habnormal skin pigmentations or café-au-lait spots.
' s+ _9 C$ ^ }3 N- INeurologic evaluation showed deep tendon reflex 2+* Z$ v! A9 H Y% c
bilateral and symmetrical. There was no suggestion+ E2 k! V: d0 x
of papilledema.
) ?' F1 _9 G% ^- i4 lLaboratory Evaluation) U# s" b7 |% Z0 L, A
The bone age was consistent with 28 months by/ s8 H6 K A( _7 p2 O! e; f
using the standard of Greulich and Pyle at a chrono-% x7 y! o/ t/ Y: r
logic age of 16 months (advanced).5 Chromosomal, s# ]% i3 D" t- w0 M
karyotype was 46XY. The thyroid function test ~4 ?/ F: [3 k$ U4 o
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
8 ~, J% e; x. A6 rlating hormone level was 1.3 µIU/mL (both normal).
0 |. C* Z$ c/ g$ z+ d7 {+ rThe concentrations of serum electrolytes, blood3 _3 |$ D% z; g& L0 G: Z
urea nitrogen, creatinine, and calcium all were
) u9 D3 t) S7 D4 S: wwithin normal range for his age. The concentration8 u1 q, {3 c9 ^+ |$ w
of serum 17-hydroxyprogesterone was 16 ng/dL- L; c- p) ?0 |4 l4 ]( o; u) _
(normal, 3 to 90 ng/dL), androstenedione was 20
) M2 [+ d- |; q, f2 I. nng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
# M, P0 y [( |2 Nterone was 38 ng/dL (normal, 50 to 760 ng/dL),. F: R, @3 q. W
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
6 h+ F; Y' K+ G4 A8 y( p49ng/dL), 11-desoxycortisol (specific compound S): P- P2 ^7 Z Q
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
7 G. a$ w" e! n& p6 y# }2 S2 otisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total2 E% j2 }: J6 i' \/ L8 S% V
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),; ?) R5 Z; l! D5 o/ j* n
and β-human chorionic gonadotropin was less than3 W; v( O2 b7 t/ z/ g# u
5 mIU/mL (normal <5 mIU/mL). Serum follicular
6 _3 {7 N$ {1 b/ E$ D" g6 Xstimulating hormone and leuteinizing hormone4 o. {0 \) t' ]# D6 X) \
concentrations were less than 0.05 mIU/mL
9 X+ a" ?6 i' `! [' s, W. K9 h(prepubertal).$ `( T8 c2 s7 C& s" w8 }1 A
The parents were notified about the laboratory7 Z4 H7 u6 t4 {! u8 w
results and were informed that all of the tests were+ U9 ?% Y/ |; k& k) B/ T/ Z4 g
normal except the testosterone level was high. The
2 A* I/ m) J/ Z7 M0 ]9 e$ b# bfollow-up visit was arranged within a few weeks to
$ I9 i8 L+ _! dobtain testicular and abdominal sonograms; how-& f( a# C; T5 E b" N
ever, the family did not return for 4 months.
n' l$ b8 s) g7 H9 w6 P2 C( @Physical examination at this time revealed that the
: K% j, O O ~& c. ^/ schild had grown 2.5 cm in 4 months and had gained0 n0 l( j! p& ]) Y; `' J
2 kg of weight. Physical examination remained. X5 O% m, v/ j! Y' f
unchanged. Surprisingly, the pubic hair almost com-
' o9 l- j; l" t; Hpletely disappeared except for a few vellous hairs at
) H( h. U7 ~. l* e& {the base of the phallus. Testicular volume was still 2, I1 J9 ^. \) H; G T
mL, and the size of the penis remained unchanged.
" T( x3 P1 c- f! X3 x: j- BThe mother also said that the boy was no longer hav-
, }$ N. ^. v; ^3 D9 S' V- hing frequent erections.- C+ b& l& S( a" R2 f. }
Both parents were again questioned about use of; M h2 C0 s! J" s; V" S
any ointment/creams that they may have applied to
. |9 B) l' K2 d# r8 xthe child’s skin. This time the father admitted the
' u3 {! U, S4 NTopical Testosterone Exposure / Bhowmick et al 541
* b9 d# K1 ?; a! R8 A9 t: uuse of testosterone gel twice daily that he was apply-. s7 K F* B) L! u) m( s6 R
ing over his own shoulders, chest, and back area for/ P/ C/ k2 V A7 K+ Y# H/ j
a year. The father also revealed he was embarrassed
+ o2 L1 ~. j! w B ?to disclose that he was using a testosterone gel pre-% P1 N+ p" [ g! n+ `" [* W, r2 l
scribed by his family physician for decreased libido
2 }0 R7 f1 s* U2 h. B; Jsecondary to depression.! m9 {. d' W- ?0 s. S% E; n. w$ K
The child slept in the same bed with parents.
% o1 _3 A3 T+ R l- p* c: \The father would hug the baby and hold him on his$ v& g- v$ `7 k* [" R
chest for a considerable period of time, causing sig-
* s8 ~1 _( {, M/ ~$ m; z% Ynificant bare skin contact between baby and father.7 s8 M! a2 G6 \8 q6 \
The father also admitted that after the phone call,
$ `; q0 b4 f% q, F ]when he learned the testosterone level in the baby5 h0 z! H; u$ ?5 Y" d& Y
was high, he then read the product information
$ \ c' }4 v4 Ypacket and concluded that it was most likely the rea-3 f3 t- ]& D: M1 F3 N3 m& \3 r
son for the child’s virilization. At that time, they
, I7 A2 o2 F' E# Edecided to put the baby in a separate bed, and the& x3 G u& R( E5 `) V% U8 `
father was not hugging him with bare skin and had s" l. Y5 g1 `
been using protective clothing. A repeat testosterone V$ e6 _+ g& @0 {" x l
test was ordered, but the family did not go to the
/ a3 y$ ^$ ?: T$ |laboratory to obtain the test.3 z I) q9 \6 W. D5 ~# n% e; S
Discussion
% S% a/ c T( _Precocious puberty in boys is defined as secondary9 X0 l: v5 t/ z- M, X
sexual development before 9 years of age.1,4
7 \% `' p/ L' }9 L8 Q; x+ Z! oPrecocious puberty is termed as central (true) when, q6 R' ]) ?0 u( ?: K
it is caused by the premature activation of hypo-/ f( i+ T+ P0 u9 N# g$ i) ]8 D
thalamic pituitary gonadal axis. CPP is more com-
, |9 y% } \; S" B, p! Xmon in girls than in boys.1,3 Most boys with CPP
0 a3 E3 }3 Q) l) `6 S: _3 o7 tmay have a central nervous system lesion that is. j% [5 c6 r- B9 k% I! V4 W
responsible for the early activation of the hypothal-
* I2 P- y3 ^* B# Z* l% qamic pituitary gonadal axis.1-3 Thus, greater empha-
! w3 e3 K/ Q/ O, ^ }+ d7 }8 Isis has been given to neuroradiologic imaging in
2 t8 H# A% ^7 [9 X% q4 |" T+ Jboys with precocious puberty. In addition to viril-
2 g% Z: W: E, s! Nization, the clinical hallmark of CPP is the symmet-& L! ^2 F0 }$ J
rical testicular growth secondary to stimulation by
( e, y! Y" g9 A. Pgonadotropins.1,36 ?8 p; o/ h H8 A
Gonadotropin-independent peripheral preco-
! _3 |7 a. q* [, dcious puberty in boys also results from inappropriate
" H4 _, q+ E0 }2 f. I$ j# `androgenic stimulation from either endogenous or
: a7 n; ~3 r) u' j6 h3 Q7 Pexogenous sources, nonpituitary gonadotropin stim-
; w" G3 X# B* A4 nulation, and rare activating mutations.3 Virilizing. `# E& J6 ~0 Y/ r
congenital adrenal hyperplasia producing excessive- e4 g v8 q$ M0 e0 \* g8 u
adrenal androgens is a common cause of precocious
% a% k" F# S i. D; \5 j4 ^puberty in boys.3,44 @- R* X' g* C( b* I4 q
The most common form of congenital adrenal8 d2 {+ \$ G6 e" [8 z
hyperplasia is the 21-hydroxylase enzyme deficiency.
: K! Y! h! n7 \1 J; @The 11-β hydroxylase deficiency may also result in
" u" k3 P2 {* u( U2 j9 k, m4 Z3 Gexcessive adrenal androgen production, and rarely,; e* Q0 [: o- i7 A7 f
an adrenal tumor may also cause adrenal androgen
8 r3 f- ^. f) l+ {& ^excess.1,31 v1 }6 v! ~/ z0 e. n
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( z$ K8 [2 O3 x2 J) Q
542 Clinical Pediatrics / Vol. 46, No. 6, July 20078 W* i6 x; ^: c, y. o
A unique entity of male-limited gonadotropin-
! M6 ]! i% v. e+ q: S5 B' P$ h* vindependent precocious puberty, which is also known
- g% }* z( G% o3 Las testotoxicosis, may cause precocious puberty at a y$ k% r9 b' ~( W5 t6 M# U0 r
very young age. The physical findings in these boys( d$ C! j6 O' W, n/ J( m
with this disorder are full pubertal development,- ^9 u5 w* e/ Q8 Z9 A" B- J# ?; J
including bilateral testicular growth, similar to boys5 V6 x/ g$ `, U/ x6 y
with CPP. The gonadotropin levels in this disorder
: N1 c/ k. }$ g" N. T" _are suppressed to prepubertal levels and do not show
# \- h7 g' B8 G3 g0 S2 `- Zpubertal response of gonadotropin after gonadotropin-2 Y i% k; X Y) O* e
releasing hormone stimulation. This is a sex-linked0 `3 Y2 N9 R0 t- S% ?
autosomal dominant disorder that affects only
( t' i5 p5 C8 I* N! L8 ymales; therefore, other male members of the family
" y* M$ B9 \' a) Xmay have similar precocious puberty.3% \9 T- u2 v$ m3 ~& _- Q4 l# y
In our patient, physical examination was incon-1 C2 r5 h T0 }% W% o
sistent with true precocious puberty since his testi-
. C! N1 y2 j9 e1 N. |& ~: bcles were prepubertal in size. However, testotoxicosis0 O, a+ ]9 D$ i Q: u9 r
was in the differential diagnosis because his father) C. }/ Q/ \" v3 I8 h
started puberty somewhat early, and occasionally,7 K% [# [1 k4 G
testicular enlargement is not that evident in the
( b0 m" Q- z" c8 A0 P' i ]beginning of this process.1 In the absence of a neg-8 B; E d+ v8 b* K) q
ative initial history of androgen exposure, our; P- l% o3 N+ g: \6 B4 w8 {. l! p
biggest concern was virilizing adrenal hyperplasia,
1 _1 H$ t7 S5 y" G, y* ^9 P7 R7 \5 {! deither 21-hydroxylase deficiency or 11-β hydroxylase
4 k$ Z+ {& W* xdeficiency. Those diagnoses were excluded by find-
! h) y6 l' l1 u* Ping the normal level of adrenal steroids.+ i; G/ O2 x* w
The diagnosis of exogenous androgens was strongly
: P0 P- d5 f9 }7 m0 psuspected in a follow-up visit after 4 months because
$ O8 X) N7 e# Y' A$ {! othe physical examination revealed the complete disap-, R6 b) h* O+ u' h' S B3 d
pearance of pubic hair, normal growth velocity, and
9 W% _( T) ^$ e/ w7 [decreased erections. The father admitted using a testos-# _. o% B4 w0 T( E4 {- ?
terone gel, which he concealed at first visit. He was
; I7 K+ n$ g7 J) s1 L8 fusing it rather frequently, twice a day. The Physicians’1 s& k6 U; w) O7 w
Desk Reference, or package insert of this product, gel or
( q/ s7 r% k5 k2 `cream, cautions about dermal testosterone transfer to9 |- Z" z! v" R% t5 G
unprotected females through direct skin exposure.4 v) V$ n* o, U6 `3 Y9 i2 e
Serum testosterone level was found to be 2 times the: |% B2 a+ h( ^2 r B ?3 Z) C
baseline value in those females who were exposed to' P' Y/ Z) I8 v+ ?8 S9 j
even 15 minutes of direct skin contact with their male2 w/ o% e2 C4 L4 |; L' \
partners.6 However, when a shirt covered the applica-
" j. p7 E) s& Y1 D2 y2 \tion site, this testosterone transfer was prevented. ^7 C4 I1 y7 Q% f/ o
Our patient’s testosterone level was 60 ng/mL,
) O4 g$ x* b' R* n4 n: uwhich was clearly high. Some studies suggest that
$ P! _8 a6 ?: _; ldermal conversion of testosterone to dihydrotestos-$ L a4 k$ G" w. {8 {& S+ m; [
terone, which is a more potent metabolite, is more, [( O: [! ?2 y$ `" z2 m
active in young children exposed to testosterone$ {" l/ c5 {) W% m+ C6 x! ?* w' d
exogenously7; however, we did not measure a dihy- Y- u: N5 Z: X8 S2 w
drotestosterone level in our patient. In addition to t# \; A1 |( q: H
virilization, exposure to exogenous testosterone in
" W" P) m6 V G& q: zchildren results in an increase in growth velocity and9 y, b; k. ]+ e3 ~
advanced bone age, as seen in our patient.# L1 S) j3 c" G& h3 b
The long-term effect of androgen exposure during
( M1 L9 i) k* g- }) _4 W) Gearly childhood on pubertal development and final
% ?+ Z8 n; e. u3 B+ `- Fadult height are not fully known and always remain
0 b2 a; d8 Z! g/ {' v% ha concern. Children treated with short-term testos-
! I( F( h, M/ j h9 L6 m3 Rterone injection or topical androgen may exhibit some
" ^5 y+ F- Y7 Z* P$ ~1 h8 Pacceleration of the skeletal maturation; however, after
1 H/ \# f. G' P _3 gcessation of treatment, the rate of bone maturation
9 B+ |& ]4 p# r! \+ |6 Xdecelerates and gradually returns to normal.8,9. }) v# |: _. T5 n* T/ c, Z
There are conflicting reports and controversy
' x8 G/ A( d" | ~9 r4 O4 P1 N" H5 v$ Bover the effect of early androgen exposure on adult# ^ j. _' Q% H4 {: h
penile length.10,11 Some reports suggest subnormal0 H; g' u6 h7 x2 q0 W/ u) i$ `
adult penile length, apparently because of downreg-
2 {# n3 l, t9 Y; {$ m6 Y0 iulation of androgen receptor number.10,12 However,
! ?6 ?! Z' N2 P, c' H8 qSutherland et al13 did not find a correlation between
/ V% m* e- D1 ?# b: {childhood testosterone exposure and reduced adult
( ^. T0 t- E1 |+ P7 p, o2 Ppenile length in clinical studies.
! H* j2 H4 \, h0 Q9 G$ ?! ^. ]: PNonetheless, we do not believe our patient is; N/ D& p1 e8 w. O9 Y( |9 D
going to experience any of the untoward effects from
0 ?! {% J5 X- D: r# F4 q$ Y4 R. O# Ftestosterone exposure as mentioned earlier because' _$ B# Z1 Q! M- B6 u% O. m
the exposure was not for a prolonged period of time.7 w' ^' s) e% ^. F8 j0 d" b/ m4 l
Although the bone age was advanced at the time of
- Q$ s4 B1 K# I3 Vdiagnosis, the child had a normal growth velocity at7 _$ X( A) h+ y1 q8 L
the follow-up visit. It is hoped that his final adult2 R* u4 g) O' @7 n# y7 \
height will not be affected.' M& Q! h/ K: p, d$ ` ?
Although rarely reported, the widespread avail-
9 N3 _4 O$ k" q& R# S# |1 ~0 \1 eability of androgen products in our society may. V1 q! r8 u! }# m( a3 u2 z o
indeed cause more virilization in male or female
: n4 Q0 D& X/ lchildren than one would realize. Exposure to andro-) s: Q, y5 \4 m, E
gen products must be considered and specific ques-9 S0 H; T4 i& C0 c5 i( n3 G/ }
tioning about the use of a testosterone product or* X) f$ `2 b( c9 R2 k( W
gel should be asked of the family members during2 d5 X* ]% S$ p$ A- u* H
the evaluation of any children who present with vir-% y8 o, W4 P u) H6 Z2 X: r
ilization or peripheral precocious puberty. The diag-
1 j0 U: B9 M" ~, Nnosis can be established by just a few tests and by
# G1 ]: {% W" W( b$ D: p4 i+ h2 L& [appropriate history. The inability to obtain such a( |8 {5 L ?7 E' z
history, or failure to ask the specific questions, may5 u6 Q' J% p3 t: Y$ N" Z( m* z; P
result in extensive, unnecessary, and expensive# A9 Q$ s9 c: o' X+ Z% l7 f
investigation. The primary care physician should be8 c: v1 T# `( v& A
aware of this fact, because most of these children
9 T: K3 t- Y* b; w+ E5 S6 x+ \may initially present in their practice. The Physicians’
) r* _* o7 h' m! ^1 XDesk Reference and package insert should also put a4 x) E2 a' M: D5 g6 ], p! s5 }
warning about the virilizing effect on a male or" U' w$ `! T, t8 ?2 ^6 ?; Y
female child who might come in contact with some-
0 q6 \: d7 D" r2 P+ {one using any of these products.
! [ h0 v, H7 c4 e( yReferences
: ^% H$ o" d+ |- i& i( E ^1. Styne DM. The testes: disorder of sexual differentiation7 r/ Z: I9 m8 m& X3 z0 I8 [
and puberty in the male. In: Sperling MA, ed. Pediatric
: R- ^* ]2 v8 T7 G+ S3 c* |Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
; ~; ?8 N5 }+ S9 p2 U/ q2002: 565-628., H8 m7 f% | \) c7 F0 Z
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious3 F& {' l8 E S- R# t; w/ o3 i; r C
puberty in children with tumours of the suprasellar pineal
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Topical Testosterone Exposure / Bhowmick et al 543
# v9 f5 d: m" m2 N8 `areas: organic central precocious puberty. Acta Paediatr.
+ j: h$ W, s3 i* y3 y% b2001;90:751-756.
; J( y6 h1 s* x( {3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.5 I- {3 @# C! r8 }# E
Pediatric Endocrinology. 4th ed. New York, NY: Marcel7 i. x" T2 |( R! [+ i# [3 Q
Dekker Inc; 2003:211-238.
6 b8 D) w4 G6 r7 G/ k3 ~0 P$ Z4 b4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual+ I: p+ ~6 r. R a5 t
development in a two-year-old boy induced by topical
7 z. K1 l2 Y9 ~% T% ]( {! u- _exposure to testosterone. Pediatrics. 1999;104:e23.
0 B* r- ?7 I0 N% h5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
) j% {7 U' u8 |( B- P) oSkeletal Development of the Hand and Wrist. 2nd ed.
, w9 `, W% G: @" U3 ]Stanford, CA: Stanford University Press; 1959.0 }! D4 O7 }; F! H* L
6. Physicians’ Desk Reference. Androgel 1% testosterone,
9 k# [1 {8 C# \. P' `Unimed Pharmaceutical Inc. Montvale, NJ: Medical& B. U3 ~" D$ i
Economics Company, Inc; 2004:3239-3241.
& h4 _6 @1 V- [! ]0 g7. Klugo RC, Cerny JC. Response of micropenis to topical2 m0 `* c, i; O, n
testosterone and gonadotropin. J Urol. 1978;119:
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