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is a significant concern for physicians. Central* {6 F( _, u/ X7 {) Y; f
precocious puberty (CPP), which is mediated1 b' ]% M& E- C
through the hypothalamic pituitary gonadal axis, has& D- B" K7 \8 m8 x, p" S
a higher incidence of organic central nervous system
' E6 ^# H' R! d3 klesions in boys.1,2 Virilization in boys, as manifested! ?* T m/ T E( B
by enlargement of the penis, development of pubic5 L5 e' j# e# k; A
hair, and facial acne without enlargement of testi-& |: x J6 ^5 U, B
cles, suggests peripheral or pseudopuberty.1-3 We: R/ b$ e2 w- l5 W
report a 16-month-old boy who presented with the6 j7 |" F2 e1 D0 o
enlargement of the phallus and pubic hair develop-1 ?" |6 x" P! A$ l
ment without testicular enlargement, which was due G" Y$ ]( b" f7 A2 m
to the unintentional exposure to androgen gel used by, r/ e* V) g- x9 w) S- @, y8 Q& H- a
the father. The family initially concealed this infor-9 T! m; y) ^& ]5 T- Q0 G1 S: U
mation, resulting in an extensive work-up for this4 c7 \& T8 d1 ~/ w' X& y
child. Given the widespread and easy availability of( g! d/ I3 `' K
testosterone gel and cream, we believe this is proba-3 y) i8 C1 M8 J; f: }
bly more common than the rare case report in the
7 i1 V& a$ c5 ^& ^- y; X7 D) [literature.4
" d, k+ W3 d$ n2 p L7 q. |1 dPatient Report
4 J/ W, ~) H* t9 sA 16-month-old white child was referred to the
% Y; p" W+ K W: Vendocrine clinic by his pediatrician with the concern
6 {: W& L4 w* R( W- r! \of early sexual development. His mother noticed
+ t/ A( Q, F6 Ilight colored pubic hair development when he was
- V9 k( ?' P: f5 U& R3 z1 iFrom the 1Division of Pediatric Endocrinology, 2University of$ W$ F: @9 c2 R
South Alabama Medical Center, Mobile, Alabama.
. S$ V0 R' b# }/ D/ xAddress correspondence to: Samar K. Bhowmick, MD, FACE,4 ]7 Q0 k2 D# s) I) U
Professor of Pediatrics, University of South Alabama, College of
; X) Y" F! R# [: ]- M6 H" C! f/ uMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( Y" v8 H' {1 X' s
e-mail: [email protected].
9 R, P3 W" D* I3 W: Yabout 6 to 7 months old, which progressively became" N3 }+ _7 k+ {8 S; H
darker. She was also concerned about the enlarge-
) h& e7 u! d9 V* G& d& c6 l/ b& Wment of his penis and frequent erections. The child
$ J% M$ @' {9 Z& U' twas the product of a full-term normal delivery, with
9 c; m! Y8 L; q3 V* Pa birth weight of 7 lb 14 oz, and birth length of
# G) ?- U6 a' e: p0 |6 \+ l) _20 inches. He was breast-fed throughout the first year% a9 [3 F1 P- V1 Q. W) B) T
of life and was still receiving breast milk along with& B$ @) T2 r2 v# e8 Q
solid food. He had no hospitalizations or surgery,6 W, r5 H- K5 P7 \* }& D6 U
and his psychosocial and psychomotor development4 { {7 ?3 L5 d
was age appropriate.8 P8 | O1 m8 ~$ M& J
The family history was remarkable for the father,( x% J3 H2 G! Q, k5 X9 a
who was diagnosed with hypothyroidism at age 16,9 G* J3 _ j( n: W) b( q5 x
which was treated with thyroxine. The father’s) c8 {2 i b$ h! g7 }
height was 6 feet, and he went through a somewhat: s4 X& L5 L4 ^4 o, y- p
early puberty and had stopped growing by age 14.
3 B0 l+ v4 _$ T% ?; \7 t; wThe father denied taking any other medication. The
1 X8 q" h+ i" u% |0 lchild’s mother was in good health. Her menarche" }5 ? _, Y! R9 [0 u" g: }2 n$ ]$ ]
was at 11 years of age, and her height was at 5 feet
6 P f+ l i* u+ O5 inches. There was no other family history of pre-
& F% Z5 K$ a4 g) H( Scocious sexual development in the first-degree rela-
$ C. j d# p9 m1 rtives. There were no siblings.$ u. C, m0 Y; X9 c& w% c; P
Physical Examination
% a H. ?. V+ t6 KThe physical examination revealed a very active,/ w6 O/ e8 J @4 a. H3 X
playful, and healthy boy. The vital signs documented, X9 L( z# C: L4 g
a blood pressure of 85/50 mm Hg, his length was
/ F6 T" ?! P: I5 F# W: t90 cm (>97th percentile), and his weight was 14.4 kg, Q" r" \3 f+ P* @2 l( @/ h9 ]
(also >97th percentile). The observed yearly growth4 E, J" j- C5 U& u/ W! K
velocity was 30 cm (12 inches). The examination of
6 b" G: o: W# bthe neck revealed no thyroid enlargement.
& g0 O* u& M- i, f# w8 ^The genitourinary examination was remarkable for
' V0 u4 u7 X, O. T& [enlargement of the penis, with a stretched length of
x% `1 \& B7 Y6 E! r4 g) J8 cm and a width of 2 cm. The glans penis was very well! h8 J& F8 c2 ?
developed. The pubic hair was Tanner II, mostly around
4 v$ p1 g+ m8 f" y0 t& [5 _540
# D! V' B5 b2 a9 K8 W! gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
5 W( u7 q5 r4 A) Fthe base of the phallus and was dark and curled. The6 |( r* \ J# w4 r! U `" X
testicular volume was prepubertal at 2 mL each.
0 A4 g7 U, b3 g2 ^9 l6 P1 H- I9 M0 S8 gThe skin was moist and smooth and somewhat' t9 d+ W0 |' `% m6 t: I
oily. No axillary hair was noted. There were no5 f; X; A' b5 M" K
abnormal skin pigmentations or café-au-lait spots.
& b2 [( }: B- U/ x K; S- [Neurologic evaluation showed deep tendon reflex 2+# W- y& Y4 k$ R2 Y# U' K3 ~7 p: j
bilateral and symmetrical. There was no suggestion- W! w) L7 M# O; M
of papilledema./ e; C G) [8 q$ W. q+ s
Laboratory Evaluation; e, @4 O* N" ?+ \6 H
The bone age was consistent with 28 months by6 v1 h. V6 |/ D/ d" r3 c
using the standard of Greulich and Pyle at a chrono-
! G+ m0 o" g: }6 X& O% Blogic age of 16 months (advanced).5 Chromosomal
/ _% R+ ~# Q/ f3 B5 }karyotype was 46XY. The thyroid function test/ n _- H* M/ T' f7 h# [% C
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
6 U8 l1 |; x: y; s4 o( c9 Qlating hormone level was 1.3 µIU/mL (both normal).
3 {$ A" w& F6 z5 SThe concentrations of serum electrolytes, blood4 x7 s, W* a' M, y8 T0 J' G5 a8 K. Z
urea nitrogen, creatinine, and calcium all were
1 e& E( S. O) E% ^2 qwithin normal range for his age. The concentration; o% j5 s; ^. d! O0 z W8 g& v
of serum 17-hydroxyprogesterone was 16 ng/dL
# e2 l/ G+ a0 I: C(normal, 3 to 90 ng/dL), androstenedione was 20
9 Z- d% d _5 G% K! a* Qng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
/ Q/ e$ G2 r0 C3 j1 C" i3 Lterone was 38 ng/dL (normal, 50 to 760 ng/dL),
6 z: c# u& S2 b( a4 G5 w" F, K% O6 Zdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
- P' E$ n5 o" r8 B' [+ y5 p49ng/dL), 11-desoxycortisol (specific compound S)
- S( T0 ^, z- O' dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-4 Q* y! S: L/ n3 }1 q$ [9 c \6 Y2 E
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
, p! n( N5 m" @" w: H0 ^8 t5 l: P' Ftestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
1 m; t/ T, b# ]4 _# _$ z; y' Mand β-human chorionic gonadotropin was less than
7 s7 w" H6 w: e/ ^- r( W8 W5 W5 mIU/mL (normal <5 mIU/mL). Serum follicular
i; T, i( F$ H- H* ?- {: ~7 L. Wstimulating hormone and leuteinizing hormone
& B/ W1 s, S) y* Z( Qconcentrations were less than 0.05 mIU/mL
2 Z, [8 B; S- c0 |(prepubertal).
$ G. I# K: y4 T- X& c& GThe parents were notified about the laboratory6 i! O1 [: A) C4 C* O
results and were informed that all of the tests were
`# T3 Y9 w: S! knormal except the testosterone level was high. The
( n R8 B0 i" r4 X7 H$ r% |0 E* yfollow-up visit was arranged within a few weeks to
+ S* j I- `1 e% @, p2 U' q# tobtain testicular and abdominal sonograms; how-
/ i0 ]( v* z' y% }1 Wever, the family did not return for 4 months.4 z1 r! S8 H" D
Physical examination at this time revealed that the- j6 U$ |# n2 D- O9 c/ n
child had grown 2.5 cm in 4 months and had gained
1 \& q. t, f# [0 E; D3 ?2 kg of weight. Physical examination remained$ `$ x9 B- E+ j" D
unchanged. Surprisingly, the pubic hair almost com-
/ K- A2 P8 Y' upletely disappeared except for a few vellous hairs at) _: G; C# [+ y' b& ~
the base of the phallus. Testicular volume was still 2
- S- {* r+ \3 X5 l# |/ u4 V( i9 lmL, and the size of the penis remained unchanged.
! k! E0 y2 b2 h: l- j2 NThe mother also said that the boy was no longer hav-
, N0 L% j5 D; _& bing frequent erections.
! o/ h0 _3 H |( u Q# cBoth parents were again questioned about use of
, ~! x* U! n; m) Q) uany ointment/creams that they may have applied to
7 I# b# ^; E* ^- h' Hthe child’s skin. This time the father admitted the- i! P) c) |; I% e$ ]: k/ @
Topical Testosterone Exposure / Bhowmick et al 541
& }. x/ i1 ^; a4 _; Z0 U( juse of testosterone gel twice daily that he was apply-5 B2 R h- ^/ c6 M7 p; ^: P
ing over his own shoulders, chest, and back area for! E) Y( ~* |/ H6 B% ^0 B. }, G! E
a year. The father also revealed he was embarrassed
" f S! T/ F) Jto disclose that he was using a testosterone gel pre-
! _8 A4 k+ K& k" i& |/ O7 Iscribed by his family physician for decreased libido1 W3 X/ z7 Q4 G
secondary to depression.
! N4 Q9 K3 p! L5 k4 m8 b3 zThe child slept in the same bed with parents.% A8 e+ l4 |. q, F) F) O, c
The father would hug the baby and hold him on his
4 v8 r+ q9 ^9 z8 k& ^chest for a considerable period of time, causing sig-
5 k3 k M5 j8 a1 _9 C# J: b6 y/ xnificant bare skin contact between baby and father.
/ p' g! n. e% `5 r2 g/ Y; TThe father also admitted that after the phone call,/ Q3 c, D- d, E8 q
when he learned the testosterone level in the baby
( e$ P9 `7 u& g( B4 dwas high, he then read the product information
3 O9 R9 J, b& d7 \' p( W+ g ~packet and concluded that it was most likely the rea-
! G3 J$ m- a# m1 d2 n4 [son for the child’s virilization. At that time, they
: j$ J2 ?5 }- t) F4 `decided to put the baby in a separate bed, and the
* `" N' M4 @( `+ G1 vfather was not hugging him with bare skin and had
; d; m4 @. X# Q( d8 T5 Y5 Tbeen using protective clothing. A repeat testosterone% y F: O8 n, L
test was ordered, but the family did not go to the
) e1 y3 D- \9 i' _2 H6 F5 w/ Jlaboratory to obtain the test.- [( g$ [' } T2 S B
Discussion
/ F8 U6 F( H. R+ y1 w; L, ]! `# n1 WPrecocious puberty in boys is defined as secondary4 n* k. j( V C( c& s' a* t5 P
sexual development before 9 years of age.1,4
" v* Y7 G" @2 OPrecocious puberty is termed as central (true) when
% S$ c0 i2 ^7 [4 _( Iit is caused by the premature activation of hypo-
: u9 Y( X5 Z3 \+ i \9 n5 ]thalamic pituitary gonadal axis. CPP is more com-
4 G* ^! M3 _# Y9 F8 _5 }# [7 O8 }mon in girls than in boys.1,3 Most boys with CPP
' H/ `& S: U, u7 Wmay have a central nervous system lesion that is
- a$ [( E4 l0 ]- ], Z8 mresponsible for the early activation of the hypothal-1 v8 E$ w* D6 x3 O
amic pituitary gonadal axis.1-3 Thus, greater empha-
6 j4 h5 W6 ]: _- t% B/ T4 nsis has been given to neuroradiologic imaging in
7 i9 b# W1 \8 aboys with precocious puberty. In addition to viril-' J0 ]: J% l. D- `1 H' a
ization, the clinical hallmark of CPP is the symmet-
( }# h* v5 b. E9 Krical testicular growth secondary to stimulation by+ X: l' s" Z: K+ l; K
gonadotropins.1,3
; I$ m# G( @& Y5 e2 Y: qGonadotropin-independent peripheral preco-
% J$ I3 }; |$ g/ h; e$ Wcious puberty in boys also results from inappropriate% d4 j2 O/ ~- y3 l6 n+ ]2 l
androgenic stimulation from either endogenous or4 Y5 m1 m# F3 B( [$ f& Y
exogenous sources, nonpituitary gonadotropin stim-
5 r% `! B2 X4 }' E; Gulation, and rare activating mutations.3 Virilizing
; J& H/ k* O& p$ b6 @5 ~congenital adrenal hyperplasia producing excessive
8 j2 j2 Q! w! Yadrenal androgens is a common cause of precocious
+ k9 b- u9 C) G; s7 |* Zpuberty in boys.3,4
9 b, o2 L( R: x4 w0 FThe most common form of congenital adrenal
. n% H9 \. }+ R. a; r3 g% f. m whyperplasia is the 21-hydroxylase enzyme deficiency.
( n- @7 _4 J) y. O6 b1 C; k& OThe 11-β hydroxylase deficiency may also result in- N2 L4 m) W A- _0 t: c: ]) f
excessive adrenal androgen production, and rarely,& Y+ T6 e) V0 }$ S/ p7 Q+ Q0 o
an adrenal tumor may also cause adrenal androgen" f4 V. g4 d u" w* A% ~3 x$ H
excess.1,3
/ E: I8 h* D- l) N: vat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: k8 ]4 X) c8 V7 g% r542 Clinical Pediatrics / Vol. 46, No. 6, July 2007" X a6 G* y( h# o
A unique entity of male-limited gonadotropin-% h( K- l5 S2 l* w: c' B
independent precocious puberty, which is also known5 t4 I) ^* [6 b2 n+ W5 G1 [
as testotoxicosis, may cause precocious puberty at a2 U1 u9 F6 z3 t) C8 \' |6 b
very young age. The physical findings in these boys
4 c" Z; f: M" qwith this disorder are full pubertal development,, C+ r7 D' R* r& }( F
including bilateral testicular growth, similar to boys
! X% ]4 I/ H) P! qwith CPP. The gonadotropin levels in this disorder
; O/ i: F3 b6 y6 ^, n/ M& z2 Aare suppressed to prepubertal levels and do not show1 O5 i8 _7 O, Z+ k; `
pubertal response of gonadotropin after gonadotropin-
% {1 M8 C$ Y) z4 areleasing hormone stimulation. This is a sex-linked( G% @, t1 j) O; ^2 D, @6 f* J
autosomal dominant disorder that affects only: Y6 g# J+ X V9 r2 y7 B R
males; therefore, other male members of the family
; @4 B0 [' E6 V2 a! a' n7 Pmay have similar precocious puberty.3, J8 j" _: [& ]% m# P
In our patient, physical examination was incon-
5 Z" N8 u9 H0 @) I: o, j: |sistent with true precocious puberty since his testi-- z1 w% n: l& P- ?- p
cles were prepubertal in size. However, testotoxicosis
9 Y3 V, ^) G, P0 Iwas in the differential diagnosis because his father
0 O1 @: X/ k6 T% B* dstarted puberty somewhat early, and occasionally,
+ @* Z+ ~* H1 Etesticular enlargement is not that evident in the
4 S7 o k8 t# t& ?beginning of this process.1 In the absence of a neg-5 U$ d$ a, K) @+ p1 u+ g# P
ative initial history of androgen exposure, our
# r4 V" A5 `0 O& c2 ^biggest concern was virilizing adrenal hyperplasia,3 N& c2 v- x% O, `! u# X A& K2 C
either 21-hydroxylase deficiency or 11-β hydroxylase+ ~& c5 y! E1 s. `
deficiency. Those diagnoses were excluded by find-( A. V1 {- Q6 r* ]+ M% u% f( g
ing the normal level of adrenal steroids.
! W( T+ r% l) pThe diagnosis of exogenous androgens was strongly
- j- Q; {+ s: Q& \) O3 A& Nsuspected in a follow-up visit after 4 months because
" D7 W: ^( z- x- B$ F$ ithe physical examination revealed the complete disap-$ Y* g4 K( n( |, M: @1 h
pearance of pubic hair, normal growth velocity, and
2 ]1 o4 S" @7 i$ v adecreased erections. The father admitted using a testos-: B7 w* S$ Q! a7 `
terone gel, which he concealed at first visit. He was: L5 E5 C6 G M8 F
using it rather frequently, twice a day. The Physicians’, }! ~, _8 Q! v
Desk Reference, or package insert of this product, gel or; o G; \0 O" R- r- V1 w
cream, cautions about dermal testosterone transfer to0 s0 F- `, [1 e/ c
unprotected females through direct skin exposure.
. u0 ?& ]$ h* J1 hSerum testosterone level was found to be 2 times the
6 @$ ^7 `3 O0 @+ M6 Abaseline value in those females who were exposed to
4 d8 Q r: r0 @; Z5 Q; ieven 15 minutes of direct skin contact with their male
0 G- P! }7 o8 Y1 z) J* R6 W! r( Ypartners.6 However, when a shirt covered the applica-' e `1 l% ?5 \' f9 ~: S
tion site, this testosterone transfer was prevented.
! Q, a- g% w( y( c& K; H8 f9 NOur patient’s testosterone level was 60 ng/mL,
; T3 L! u! G- O5 ywhich was clearly high. Some studies suggest that
" x7 z4 @3 S+ V( J ~% ?+ ]dermal conversion of testosterone to dihydrotestos-
9 t9 ^2 p& p1 d. t& n" e5 q7 Yterone, which is a more potent metabolite, is more& g; F" a5 i4 x% |8 B1 Y
active in young children exposed to testosterone
9 t2 q: M0 e( ?0 ]7 q" r3 gexogenously7; however, we did not measure a dihy-
2 p8 j1 [" y/ |# c5 j; m4 rdrotestosterone level in our patient. In addition to' d# a' D" G, N# d, }
virilization, exposure to exogenous testosterone in2 i7 U% B( D" m1 m* K2 G
children results in an increase in growth velocity and
4 C9 L# J5 d( X# D. `advanced bone age, as seen in our patient.
# N+ B! k9 e# `! x9 k2 j6 ]: L% gThe long-term effect of androgen exposure during# r$ K4 N/ l8 U* c
early childhood on pubertal development and final
. r, g v1 a" M+ U( v6 E5 [adult height are not fully known and always remain5 D+ B4 \# N2 m, x' E1 q# A/ J& ]8 D
a concern. Children treated with short-term testos-
( W; P- {! e$ `% g s& T; Vterone injection or topical androgen may exhibit some
0 g, g7 C6 m" \0 ~3 w- jacceleration of the skeletal maturation; however, after
( @$ U1 v9 t4 L9 m( n( gcessation of treatment, the rate of bone maturation2 p& e1 r- ^8 f' y
decelerates and gradually returns to normal.8,96 S) x1 x) u( P! x
There are conflicting reports and controversy
- H8 B: k+ ]# u* n. c" C. t! g, uover the effect of early androgen exposure on adult3 t; \- ^0 X" W2 V* K! X8 c P! p/ \9 m
penile length.10,11 Some reports suggest subnormal% U- ~" |: e6 Y5 S/ E
adult penile length, apparently because of downreg-% m" u+ }3 M2 \8 p
ulation of androgen receptor number.10,12 However,) A) R G- l5 ~2 Q
Sutherland et al13 did not find a correlation between
% I" b' U! J% U* j$ B p3 Dchildhood testosterone exposure and reduced adult" p) r6 s0 _ Y M8 y% J' l
penile length in clinical studies.( Y1 D, P: k6 E
Nonetheless, we do not believe our patient is
& d+ [& q" C# \* q, G1 Egoing to experience any of the untoward effects from
- o! y" e! M4 B, u6 x5 S& Etestosterone exposure as mentioned earlier because3 a* g, o) r4 Y7 F, p
the exposure was not for a prolonged period of time.4 B( |/ M1 u n+ g% r* G+ v7 K
Although the bone age was advanced at the time of9 [" V3 k7 f* z
diagnosis, the child had a normal growth velocity at
6 u2 x+ O; g, z" ythe follow-up visit. It is hoped that his final adult! K. W- M' M3 ~" x
height will not be affected., q+ u* U4 U) K( u+ \ a) Z+ c
Although rarely reported, the widespread avail-4 a* T( `& u* T* [& u+ U+ ~
ability of androgen products in our society may
0 C9 T% l8 ~' Z& n; H* oindeed cause more virilization in male or female
i p) h1 G6 X4 H3 ~2 v* ]1 c: Nchildren than one would realize. Exposure to andro-
( n9 [$ I8 l4 P jgen products must be considered and specific ques-& v- ^" b' N% k
tioning about the use of a testosterone product or+ Q. s J3 S& O& r
gel should be asked of the family members during
6 T: u$ R7 B. R4 N* {the evaluation of any children who present with vir-* c5 L4 c% K. ^4 i
ilization or peripheral precocious puberty. The diag-
$ E2 U I+ J- p2 ^# D# d7 onosis can be established by just a few tests and by
3 J3 y5 K3 d# H3 jappropriate history. The inability to obtain such a
4 o7 I! q# c$ n+ e5 ^history, or failure to ask the specific questions, may
9 Q+ K3 J* D# l8 T$ _; v9 Aresult in extensive, unnecessary, and expensive- S. i" u" \! E4 Z. K
investigation. The primary care physician should be4 ~" O: _' G- {. B; K( `+ C
aware of this fact, because most of these children
- q* f3 J) o+ Q- t tmay initially present in their practice. The Physicians’% p& ?: |5 g4 Y8 [( v% \
Desk Reference and package insert should also put a; M; r7 e/ u9 H0 q2 t5 Z$ U
warning about the virilizing effect on a male or
; R6 x4 `* _" ufemale child who might come in contact with some-
+ J9 f& @& O9 eone using any of these products.2 p/ o3 z ?8 s' K6 D. \: n! p
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% i% u, N5 G* ^Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;4 J% Y4 E% E0 t, U$ u
2002: 565-628.
4 O. B# W- i# d& w2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious5 l% e' v6 S9 M) h
puberty in children with tumours of the suprasellar pineal3 c9 K& E, L- c7 V% ~
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# B3 S7 X* B% N. r: eareas: organic central precocious puberty. Acta Paediatr.
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* w7 t; f& ~4 _2 A7 j4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual6 p0 Z7 d& [* U5 g3 X" s
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$ J6 Z0 W/ M4 t( M4 \exposure to testosterone. Pediatrics. 1999;104:e23./ I/ m: H1 \/ V0 m, l* J% Z
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Economics Company, Inc; 2004:3239-3241. G' M+ N2 ~& X9 @, f
7. Klugo RC, Cerny JC. Response of micropenis to topical
2 J; m2 J& \/ `) L8 O6 [' htestosterone and gonadotropin. J Urol. 1978;119:
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