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is a significant concern for physicians. Central
9 Q2 U5 q6 W3 z& e7 ~5 R+ n G. |precocious puberty (CPP), which is mediated
. ?7 [; n0 n9 B; G- P& C: Xthrough the hypothalamic pituitary gonadal axis, has% o4 p% J7 F: u
a higher incidence of organic central nervous system
% n/ D0 _7 X' W( A. I% clesions in boys.1,2 Virilization in boys, as manifested
3 d1 ?8 n( v+ } R) [5 ?by enlargement of the penis, development of pubic+ K5 ?8 V/ r J* ~. O: [* @
hair, and facial acne without enlargement of testi-
/ N3 o/ H2 r1 zcles, suggests peripheral or pseudopuberty.1-3 We
: \/ T) s* w* R. X3 ireport a 16-month-old boy who presented with the, R8 T. ^( z1 X# C" n% x+ L' K
enlargement of the phallus and pubic hair develop-9 V6 u& s2 E) M6 m( J
ment without testicular enlargement, which was due
0 y* i: d. A: l. Xto the unintentional exposure to androgen gel used by
6 H4 y6 r2 l, f6 ithe father. The family initially concealed this infor-1 F' C: b+ p. Y: f9 y. h- a1 U
mation, resulting in an extensive work-up for this$ c- g$ C2 T9 J y! n
child. Given the widespread and easy availability of
$ @# t3 Z( j1 ^testosterone gel and cream, we believe this is proba-0 H- ^6 ]# ~# w# f
bly more common than the rare case report in the
* e2 D) A( M, B" x5 c3 D. \! x6 }literature.4
6 D- v$ s6 J' }3 L3 rPatient Report1 j0 d4 G$ n( }. b3 _ b5 D
A 16-month-old white child was referred to the* k# F2 p0 b' h W% e
endocrine clinic by his pediatrician with the concern* a$ D/ w9 n4 x# I% J" \. D
of early sexual development. His mother noticed
3 H& O" ]- `, B; L4 Q' i$ ~light colored pubic hair development when he was7 m9 ~* X- R/ l' u
From the 1Division of Pediatric Endocrinology, 2University of
7 g3 o* G% }, WSouth Alabama Medical Center, Mobile, Alabama.
$ c) ~4 N& j2 LAddress correspondence to: Samar K. Bhowmick, MD, FACE,
* O8 f0 g0 @1 KProfessor of Pediatrics, University of South Alabama, College of4 E6 D+ \ T" G% g. [! O, A3 p- ~- m
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;% k S! U# C, l$ h
e-mail: [email protected].$ V* D6 l$ T& y5 [" R y |
about 6 to 7 months old, which progressively became: o/ A- T. r, ^9 c$ D$ U: i9 x. D
darker. She was also concerned about the enlarge-8 ]( {! u: l3 V7 x
ment of his penis and frequent erections. The child
0 x8 d3 ~/ K2 k6 Bwas the product of a full-term normal delivery, with
# q8 F# g4 A- K3 za birth weight of 7 lb 14 oz, and birth length of
% {# T; d3 i5 T8 S; H' n20 inches. He was breast-fed throughout the first year
! c0 a1 b4 h: h% O. K. C6 {of life and was still receiving breast milk along with$ J( R2 g/ r$ A% @" d& F. }: |, y
solid food. He had no hospitalizations or surgery,
0 |+ B n, z1 b7 I. ^$ yand his psychosocial and psychomotor development v) ~" B0 I6 Q
was age appropriate.7 @. F' [( R" [. V
The family history was remarkable for the father,! c9 l0 _/ j% X, n. M. j
who was diagnosed with hypothyroidism at age 16,0 r6 n' m3 c8 L' v- }1 |
which was treated with thyroxine. The father’s
1 v9 A3 S/ r* l7 U3 iheight was 6 feet, and he went through a somewhat
# i, {; {3 G5 _: c3 m, G" Vearly puberty and had stopped growing by age 14.4 u, v# f1 U, q" }
The father denied taking any other medication. The# {) W6 \2 @: _- e' E
child’s mother was in good health. Her menarche
7 @3 L1 S( u0 P1 t/ [was at 11 years of age, and her height was at 5 feet( K9 ]# f0 Y4 g5 g. U4 ^
5 inches. There was no other family history of pre-
3 D) e; I( f. H' B3 O4 Zcocious sexual development in the first-degree rela-
9 y+ X; ^( r! X5 @# S2 O/ _tives. There were no siblings. @6 P$ q! g4 S2 [ x
Physical Examination
$ q, d* f( _, {! EThe physical examination revealed a very active,& y, ]" I; I' {9 U. {2 h
playful, and healthy boy. The vital signs documented
8 H8 F. S- b* M! z! z- u9 Ga blood pressure of 85/50 mm Hg, his length was$ ]) z, M( d4 k' }9 s
90 cm (>97th percentile), and his weight was 14.4 kg
9 X3 b# o6 l' F& M% j(also >97th percentile). The observed yearly growth
# d; V( {% C- t- F; jvelocity was 30 cm (12 inches). The examination of1 k; g% L& v( u8 S( R! s
the neck revealed no thyroid enlargement.
8 U( A2 A; v, J8 JThe genitourinary examination was remarkable for
) L6 H# l, {, v% b6 U2 b2 z: Uenlargement of the penis, with a stretched length of
( e; t3 R1 N3 J( J; o& X8 cm and a width of 2 cm. The glans penis was very well
7 W/ q! m+ H; g I `5 E6 a2 Kdeveloped. The pubic hair was Tanner II, mostly around* k7 z( B4 k4 Q8 _
540. G4 W* e2 n4 h) u
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
) m9 U" p5 R9 W; H, othe base of the phallus and was dark and curled. The; [. a& i( [7 i7 D1 F
testicular volume was prepubertal at 2 mL each.
! D3 F$ G/ v: `2 h( y5 q0 jThe skin was moist and smooth and somewhat
+ _( `, d' Y& m8 S2 j( Ooily. No axillary hair was noted. There were no! V+ d5 T- b1 V3 [; D8 {/ W6 |( V
abnormal skin pigmentations or café-au-lait spots.4 Z# H2 X( e) _/ W0 C8 _
Neurologic evaluation showed deep tendon reflex 2+
, w) J& l ~8 w5 [/ L( t b( Xbilateral and symmetrical. There was no suggestion
2 D2 |+ m; l$ v9 p# }of papilledema.
9 s1 L: e. d: } X9 \) GLaboratory Evaluation; C& A# r+ h4 H% X9 t
The bone age was consistent with 28 months by3 N2 z4 Z+ E: B- T6 k O
using the standard of Greulich and Pyle at a chrono-
' M0 I' j6 l( ^logic age of 16 months (advanced).5 Chromosomal
* `, M; u I) }4 A0 Hkaryotype was 46XY. The thyroid function test
9 ^- [# @, L/ Z! a* k7 h+ J) zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
# ~' @( F/ N2 f4 s7 vlating hormone level was 1.3 µIU/mL (both normal).
9 `# }. ^8 Y3 vThe concentrations of serum electrolytes, blood
0 Z a) ~5 ]0 z6 P' l7 s9 Durea nitrogen, creatinine, and calcium all were* \8 h/ B5 x8 b7 }
within normal range for his age. The concentration
) \; q- ^- q$ y6 ^2 y- Tof serum 17-hydroxyprogesterone was 16 ng/dL7 y/ m; e7 ]# ^
(normal, 3 to 90 ng/dL), androstenedione was 20
+ D `2 |% A1 g; s- x$ a# gng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-. P- D7 ^5 d+ L, G% o" f2 D* j
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
- t2 a: }4 @5 r9 J; }desoxycorticosterone was 4.3 ng/dL (normal, 7 to; y3 n- l4 A8 u8 [& a
49ng/dL), 11-desoxycortisol (specific compound S)
5 K2 j' I1 U1 Y% S r$ ]was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-7 g' H5 @1 v; _# p! i# a
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
8 o9 k' f) z- qtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
7 Z5 m% `& p7 }* Oand β-human chorionic gonadotropin was less than
. h" h4 F5 K/ ?7 j: b# h) h5 mIU/mL (normal <5 mIU/mL). Serum follicular( D' o0 F3 `# |- |$ u, q
stimulating hormone and leuteinizing hormone8 v, O% c$ L( Y" K/ D* W
concentrations were less than 0.05 mIU/mL# ^3 _. z/ \$ s* \# A; W
(prepubertal).
) Q8 U& ^2 m6 y* xThe parents were notified about the laboratory2 k6 q! c" j& Z
results and were informed that all of the tests were. @* m7 }4 M- D
normal except the testosterone level was high. The
: [5 X) f9 } U" Q9 ^follow-up visit was arranged within a few weeks to
, E: D* O* Z. _* O$ {2 Dobtain testicular and abdominal sonograms; how-# Q' _3 @/ E2 O( N5 q! F n: \6 R) u
ever, the family did not return for 4 months.) B9 u9 l3 \" D7 ]
Physical examination at this time revealed that the
( I3 M Q) o+ E6 W& x' Lchild had grown 2.5 cm in 4 months and had gained8 [' F$ J3 o, W: `/ k
2 kg of weight. Physical examination remained
* k& f, s( l, _; A. d5 O+ W) j0 Wunchanged. Surprisingly, the pubic hair almost com-7 v5 z( v( P5 h1 D
pletely disappeared except for a few vellous hairs at5 d, e; a: K: e1 J1 K3 D" a
the base of the phallus. Testicular volume was still 2
9 P7 Q2 A- p/ z6 n8 kmL, and the size of the penis remained unchanged.8 q5 W: o+ Q; R- C; K
The mother also said that the boy was no longer hav-
m9 h$ g1 ~4 w9 L) v8 hing frequent erections.
9 B; A7 j1 X0 q/ gBoth parents were again questioned about use of4 X, G6 @4 d n" S9 o
any ointment/creams that they may have applied to
0 Y6 [1 e" M( R6 i; K, hthe child’s skin. This time the father admitted the
! v3 r& U2 p) ^" P" t+ NTopical Testosterone Exposure / Bhowmick et al 541
, {- C( P, I7 ~( }# \8 W yuse of testosterone gel twice daily that he was apply-0 o. t& o# r' V' p& `8 j
ing over his own shoulders, chest, and back area for7 [5 w. m/ s" \$ G3 W% u; x
a year. The father also revealed he was embarrassed
1 P9 S. A- a( h* E7 @/ H k% }4 ^to disclose that he was using a testosterone gel pre-1 F! b! d2 \, w$ k6 Q
scribed by his family physician for decreased libido# B, J) r* n: A
secondary to depression.' D. F5 I& ^ `0 U0 r
The child slept in the same bed with parents.
: F' u, O! K- E+ j2 d' ^The father would hug the baby and hold him on his
8 E- K) u. Y9 u$ y1 Cchest for a considerable period of time, causing sig-3 b3 s5 X* _$ c7 ? A
nificant bare skin contact between baby and father.; O" }0 I7 ?5 ]7 `4 y" A
The father also admitted that after the phone call,
* N9 X. G9 s( H5 i6 v) Xwhen he learned the testosterone level in the baby- P; p- C& r: e
was high, he then read the product information
* W. B1 ]8 ?. U. ipacket and concluded that it was most likely the rea-2 N" H9 h% E* [4 Q0 @6 x
son for the child’s virilization. At that time, they
# U0 D+ b6 b( B( I5 c+ wdecided to put the baby in a separate bed, and the. r' b n+ w' ]$ r% A$ E( U* J
father was not hugging him with bare skin and had
6 f' n1 ~6 ?0 v* P+ }. r; ]been using protective clothing. A repeat testosterone6 q. I# V& E/ Z, {- Y
test was ordered, but the family did not go to the
1 a( U7 [- f1 X }laboratory to obtain the test.
+ w7 r* @1 [; i* j5 r; NDiscussion9 A8 \! P; L6 @ j7 B H
Precocious puberty in boys is defined as secondary
% q/ D5 Q- k5 gsexual development before 9 years of age.1,4
4 ?1 ?, s9 S( K0 P [8 J' Q5 XPrecocious puberty is termed as central (true) when
) `, c. R4 b; t6 U2 }it is caused by the premature activation of hypo-
! E) U. r0 n: h: h9 _thalamic pituitary gonadal axis. CPP is more com-
( t' v/ [. m/ d4 tmon in girls than in boys.1,3 Most boys with CPP
7 a/ V$ m( Q/ P) a0 M. zmay have a central nervous system lesion that is0 ~* M2 y& b* f- v* ~
responsible for the early activation of the hypothal-$ d( R% b& j3 v6 Y/ I2 ~
amic pituitary gonadal axis.1-3 Thus, greater empha-
7 O6 L7 A* u0 S+ }2 Psis has been given to neuroradiologic imaging in7 s$ o) {* W$ \7 K7 x- J$ G( a
boys with precocious puberty. In addition to viril-
4 M4 o" T4 j6 ~2 k- V) Sization, the clinical hallmark of CPP is the symmet-
7 |9 k) _' w) a) U& orical testicular growth secondary to stimulation by
& B6 Z6 x& K- pgonadotropins.1,3
/ K2 Q2 @( I3 D8 ?/ E4 L/ v; y1 MGonadotropin-independent peripheral preco-: B$ }% }) \- l/ I. C/ P4 V0 u% y3 O
cious puberty in boys also results from inappropriate% F% v3 O( p& V @& R4 W
androgenic stimulation from either endogenous or9 Z. m- _5 r- Q& a1 Z+ L. K5 d3 ]9 c
exogenous sources, nonpituitary gonadotropin stim-
+ l6 V! z( ^. c9 nulation, and rare activating mutations.3 Virilizing! ^: [/ ]% G8 j3 b% J" ]
congenital adrenal hyperplasia producing excessive
5 B5 ]4 m- i9 d1 p, e8 k& E6 padrenal androgens is a common cause of precocious \0 }. h7 o% ?4 n9 a: J
puberty in boys.3,4
2 u5 `8 A0 H @The most common form of congenital adrenal; O4 k2 A, E/ V; H. {: P
hyperplasia is the 21-hydroxylase enzyme deficiency.5 L& Q$ w) E. D2 d* O
The 11-β hydroxylase deficiency may also result in
' n$ W: {5 g, v& c. H/ [excessive adrenal androgen production, and rarely,
# ~% g, n4 y) man adrenal tumor may also cause adrenal androgen
7 B+ ?$ D! H1 }' Jexcess.1,3
* {6 ~/ P! E( Hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% y, b; b: W( S4 {
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
6 i& g. z3 S; j1 i- L2 qA unique entity of male-limited gonadotropin-& M+ ?. N1 z L0 m( A: s
independent precocious puberty, which is also known
$ ]5 a2 z: p$ J7 l% nas testotoxicosis, may cause precocious puberty at a
) C' A( `6 z" ^# p! w- bvery young age. The physical findings in these boys0 F6 ~; L2 z5 ?2 F+ }% g2 A
with this disorder are full pubertal development,# ~" V6 P Q3 r, g# }
including bilateral testicular growth, similar to boys
* ?' n+ U* O: V# c' O" z( P; Rwith CPP. The gonadotropin levels in this disorder
# t3 K/ w, m: W- x* @are suppressed to prepubertal levels and do not show
7 s- l2 P; A8 g1 j9 \pubertal response of gonadotropin after gonadotropin-
, v4 R5 I% E8 u. _, }. Vreleasing hormone stimulation. This is a sex-linked" ]6 U2 v) s- M. G' q; D, _
autosomal dominant disorder that affects only
6 j& v- \0 r0 A( n0 n2 rmales; therefore, other male members of the family
, W: u! q# n6 O8 i8 J, \, {* I Qmay have similar precocious puberty.3! c( F7 C. j, U3 o7 ]; T
In our patient, physical examination was incon-
8 y8 O# h7 p& R" msistent with true precocious puberty since his testi-3 y* k; A' h$ ]/ a) W* o" A. m) k3 \
cles were prepubertal in size. However, testotoxicosis) l% F; S. ?$ T% T
was in the differential diagnosis because his father
- T! u7 z& D) i5 f1 f: W, {started puberty somewhat early, and occasionally,( Q$ M, |+ ?8 l/ j+ |& t$ r
testicular enlargement is not that evident in the
4 E( n# k8 v8 w" K k- `* |! _' mbeginning of this process.1 In the absence of a neg-# Y) j P C5 z0 D8 K
ative initial history of androgen exposure, our
, v7 Y6 ~ j( X: }; }( ]biggest concern was virilizing adrenal hyperplasia,9 K7 f( n. [ z Q
either 21-hydroxylase deficiency or 11-β hydroxylase
1 e& _5 b8 B$ t" |deficiency. Those diagnoses were excluded by find-6 M& ~7 Z4 x" c5 g
ing the normal level of adrenal steroids.. G! W: `: X F0 x
The diagnosis of exogenous androgens was strongly
0 u7 c$ i9 H8 g5 `- l: O& x3 Ksuspected in a follow-up visit after 4 months because9 Y f2 I/ b. D% U, q: G
the physical examination revealed the complete disap-6 J. {" `5 \7 }' x8 o9 O- E( {
pearance of pubic hair, normal growth velocity, and
( R2 o- ]! A0 x3 l: `; L# S% {decreased erections. The father admitted using a testos-; r; N- y% p: J$ C$ ^
terone gel, which he concealed at first visit. He was
/ F# t1 T2 X$ L, Z' y4 E6 Fusing it rather frequently, twice a day. The Physicians’
9 d9 ~ U5 O# [: c6 d5 g) sDesk Reference, or package insert of this product, gel or X( c( Q, n- I! L
cream, cautions about dermal testosterone transfer to
( c; F3 i7 K5 n* _% F6 Bunprotected females through direct skin exposure.$ s% s( P) M/ q% g
Serum testosterone level was found to be 2 times the1 a! M% i' c7 _
baseline value in those females who were exposed to
' J% p# q$ _* A" teven 15 minutes of direct skin contact with their male
/ [: l! ]& I3 g8 W# Z% L6 Fpartners.6 However, when a shirt covered the applica-
@8 J+ A A. U% ?3 U9 y, Ftion site, this testosterone transfer was prevented.: i: p# r/ t5 \
Our patient’s testosterone level was 60 ng/mL,( B. B3 Z4 N+ ^/ b) J
which was clearly high. Some studies suggest that
8 h$ w4 K8 N. ?% Adermal conversion of testosterone to dihydrotestos-
7 Y" w0 n# T/ f& N8 F3 }9 d* gterone, which is a more potent metabolite, is more
/ {; T ~. ]3 k# {; L4 cactive in young children exposed to testosterone( k: o5 k- h: a+ B6 }
exogenously7; however, we did not measure a dihy-; S# n) s4 ^& m$ _8 O+ B
drotestosterone level in our patient. In addition to! d5 H0 @/ Z7 ` H$ t
virilization, exposure to exogenous testosterone in- b* w3 P, t' }
children results in an increase in growth velocity and3 c7 Q4 z1 I& D, v# K8 u
advanced bone age, as seen in our patient.1 j! K8 W! q+ `# S6 u: E/ S
The long-term effect of androgen exposure during' b( G2 |4 \5 M6 L& a# u0 R$ X( _
early childhood on pubertal development and final2 N4 j0 ?9 u4 L+ ~9 d& ~
adult height are not fully known and always remain2 B8 \7 J7 n6 P, U1 W; g! f
a concern. Children treated with short-term testos-6 [' ?7 N3 F8 Q0 f, ]
terone injection or topical androgen may exhibit some' n! @, C3 _/ S" C7 C0 y& v
acceleration of the skeletal maturation; however, after
. I" `! H$ Q# C6 \ h5 [cessation of treatment, the rate of bone maturation
& F% m: w) S b5 d; Ndecelerates and gradually returns to normal.8,9
4 q( j2 r P& V0 u% xThere are conflicting reports and controversy2 v# U: ]1 Z* D: b: N
over the effect of early androgen exposure on adult9 `+ x2 D/ c* Z) |- p# @/ Q
penile length.10,11 Some reports suggest subnormal
: ]: d' ^7 D5 O d& e2 z& Yadult penile length, apparently because of downreg-
8 o- z+ [) W* M& u3 O4 v+ Pulation of androgen receptor number.10,12 However,/ b4 W7 u8 N k6 u$ W1 E9 s0 z
Sutherland et al13 did not find a correlation between1 B) j8 Y5 F! {6 j8 L
childhood testosterone exposure and reduced adult
7 @/ P T; i! T- P( N' ?penile length in clinical studies.- |, {' C& i0 c2 [! B# P
Nonetheless, we do not believe our patient is
; h9 z& s( M/ _! f& r& h" X: Kgoing to experience any of the untoward effects from
$ _7 O! a7 _0 G8 k! F2 stestosterone exposure as mentioned earlier because
( B! ]: \6 m/ gthe exposure was not for a prolonged period of time.# x9 m7 E/ n& W- i
Although the bone age was advanced at the time of6 e( a5 r8 a0 q& j4 ~" U
diagnosis, the child had a normal growth velocity at/ r5 T# b- t" ?% {( I9 z
the follow-up visit. It is hoped that his final adult2 m$ g' T+ V g, C* e
height will not be affected.% l8 Z2 _: d9 q" s
Although rarely reported, the widespread avail-
; q, j. c* L- o# q# N F3 Yability of androgen products in our society may+ x! e6 n$ G0 H/ P5 {5 \
indeed cause more virilization in male or female
( W$ V1 {2 G& ~, t bchildren than one would realize. Exposure to andro-
8 W) u7 ?" i0 {3 D) S/ ]gen products must be considered and specific ques-
7 s; I+ \' T' O5 Vtioning about the use of a testosterone product or
, l( B9 t% Q) M% E' p' ?gel should be asked of the family members during( w8 ^9 h7 x/ Q- `6 H- [
the evaluation of any children who present with vir-0 f; S' M6 Y# {6 S
ilization or peripheral precocious puberty. The diag-
! i# F7 ~6 P/ X3 H+ Unosis can be established by just a few tests and by1 k( k' R. X8 E
appropriate history. The inability to obtain such a
0 }. t0 x6 X; [9 v2 |0 o1 m1 [, Uhistory, or failure to ask the specific questions, may
$ u" t' i7 r/ z1 t9 bresult in extensive, unnecessary, and expensive" \* n9 [* L3 n# d) n: }
investigation. The primary care physician should be
) ^; I, K4 r. ^% k/ Q, E8 raware of this fact, because most of these children5 \7 ^" N' |4 W+ J( h+ f* ]5 N
may initially present in their practice. The Physicians’2 ^6 d6 _2 F4 F% B: X: w" s& w/ }# e# h& J
Desk Reference and package insert should also put a
- w" v! f# `4 a: M& U# dwarning about the virilizing effect on a male or- u d+ H# g5 t! B9 Z1 o
female child who might come in contact with some-: d2 m j5 m( W, U8 Z" `$ q
one using any of these products.% @) D5 p" v4 g# G W
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;; b: n) B! \, | |6 w! B+ U
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5 j+ u( R- M( S2 U* p, Cdevelopment in a two-year-old boy induced by topical
' F& C, E0 q; X: k" wexposure to testosterone. Pediatrics. 1999;104:e23., h1 D+ K. `. m* H
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Skeletal Development of the Hand and Wrist. 2nd ed.8 t/ d, T9 F0 j, b7 q; ^' U
Stanford, CA: Stanford University Press; 1959.5 S4 g+ Y6 B% P& y& o8 l
6. Physicians’ Desk Reference. Androgel 1% testosterone,) L G4 d/ L8 j( l D* a% \
Unimed Pharmaceutical Inc. Montvale, NJ: Medical4 o% M. t. R6 V0 \' O( o3 ]
Economics Company, Inc; 2004:3239-3241.4 y. b0 d8 P- W- h Y5 ?3 R
7. Klugo RC, Cerny JC. Response of micropenis to topical
( U7 ^8 h6 Q' O# V! G3 }. mtestosterone and gonadotropin. J Urol. 1978;119:
$ ` ?" g5 m. n+ u* H! p6 D667-668.
' ], t( m5 O' h# M8. Guthrie RD, Smith DW, Graham CB. Testosterone, Q0 m0 H8 A8 I: R' m
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