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is a significant concern for physicians. Central
+ |1 E5 a# F N; b6 ^6 t+ ]1 rprecocious puberty (CPP), which is mediated
; n( ]8 x2 ?3 wthrough the hypothalamic pituitary gonadal axis, has8 Z; x( y% S) E3 g; ~0 x! d
a higher incidence of organic central nervous system+ i! e2 A2 J7 N( N- ^3 U6 p- k
lesions in boys.1,2 Virilization in boys, as manifested3 [7 G Y8 }5 r( }
by enlargement of the penis, development of pubic
2 o, h2 A$ \# M" U# C% M2 Ohair, and facial acne without enlargement of testi- W% J5 z& J# }8 U! ~
cles, suggests peripheral or pseudopuberty.1-3 We
2 E1 O5 B: [; H2 D7 \7 f) [$ vreport a 16-month-old boy who presented with the
4 x3 |. M% B% {. f% Tenlargement of the phallus and pubic hair develop-
* g0 h% g* e9 Z( W0 Iment without testicular enlargement, which was due3 g) q' T- N7 ] v
to the unintentional exposure to androgen gel used by
$ f5 X4 F1 V& a$ bthe father. The family initially concealed this infor-
Q! ]$ y- F& M( S3 Y4 cmation, resulting in an extensive work-up for this. k* |" N) T& d1 T: l4 Y
child. Given the widespread and easy availability of) i; l+ s, D8 O
testosterone gel and cream, we believe this is proba-5 V; z0 V" t. k7 f7 Z
bly more common than the rare case report in the
- r; u# ^0 b4 Y; j- _- D) vliterature.4+ ~4 F; g. C3 ], i! T
Patient Report
. j8 K) b4 L* W3 x7 dA 16-month-old white child was referred to the" _5 S3 E4 e/ ?8 v: i. K+ q+ W
endocrine clinic by his pediatrician with the concern" F3 n7 Q) i, s' L; `( w
of early sexual development. His mother noticed; n, ~3 j2 }% a# V0 M/ x
light colored pubic hair development when he was2 {( v) @# [& z" f' P2 V
From the 1Division of Pediatric Endocrinology, 2University of
. F. @/ T2 K! M' j, f" x: V QSouth Alabama Medical Center, Mobile, Alabama.
# M, M* U5 a- g0 ?# Z( p' O$ F9 |Address correspondence to: Samar K. Bhowmick, MD, FACE,
+ h d. A3 v* _2 R! l1 V3 vProfessor of Pediatrics, University of South Alabama, College of
8 m* i% L; T' `6 T9 A& Q8 |1 IMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;+ N! @5 D) U: r1 P6 T
e-mail: [email protected]., t% K) O( L! @# `' C6 B h
about 6 to 7 months old, which progressively became
7 Q/ ?6 c! y3 K6 S. q8 gdarker. She was also concerned about the enlarge-# y$ g" `5 q4 k$ [9 y( L( q4 o5 g. K
ment of his penis and frequent erections. The child: g1 Y) R n. I7 I, \
was the product of a full-term normal delivery, with
$ B+ C5 B7 [$ T& `a birth weight of 7 lb 14 oz, and birth length of% ]+ H8 a' ?7 n
20 inches. He was breast-fed throughout the first year1 M4 U- Y# l8 ^/ i& D% X
of life and was still receiving breast milk along with
& I. [0 Y2 K* esolid food. He had no hospitalizations or surgery,
8 F" t& y% q. J. D4 V- u& vand his psychosocial and psychomotor development0 n- d2 G' S5 v" E; s4 @% B
was age appropriate.
) [& u$ r+ l# i' P# B* J9 {The family history was remarkable for the father,
7 D# D, K' A7 a2 n. y+ ewho was diagnosed with hypothyroidism at age 16,
2 _8 `& j& n8 @1 A4 nwhich was treated with thyroxine. The father’s6 W) d3 b3 J7 v' H
height was 6 feet, and he went through a somewhat
: Y& N# T; ^& k, v2 v: Hearly puberty and had stopped growing by age 14.
8 G5 V4 F; T2 V, h- d+ z# HThe father denied taking any other medication. The& `! G' G: ^3 F7 r4 n
child’s mother was in good health. Her menarche
1 w0 \ T2 [% Pwas at 11 years of age, and her height was at 5 feet% p9 ] R0 V) D1 E4 o3 P
5 inches. There was no other family history of pre-! L0 V1 h1 U3 l6 ?$ Y
cocious sexual development in the first-degree rela-) I/ z1 G" U& s
tives. There were no siblings.
2 }# E8 o3 l6 H! YPhysical Examination+ I( I% G+ ^6 f" Q+ l$ n
The physical examination revealed a very active,2 a4 i4 B0 w. ~2 c# r8 Z; H3 z
playful, and healthy boy. The vital signs documented
# f& w4 r. D/ K. Va blood pressure of 85/50 mm Hg, his length was
" r! o' i0 |. c) N! W1 J6 ~90 cm (>97th percentile), and his weight was 14.4 kg7 Y. d/ }8 E y! U5 {, Q
(also >97th percentile). The observed yearly growth$ C2 H8 B# n% G
velocity was 30 cm (12 inches). The examination of
& G E3 t+ ~/ _6 w4 D2 v0 k3 pthe neck revealed no thyroid enlargement.
: Q/ J1 c0 d b3 NThe genitourinary examination was remarkable for1 y: [1 ? q& Y; T/ L9 @, [- ~/ Q
enlargement of the penis, with a stretched length of/ z+ A% O, a/ N* N
8 cm and a width of 2 cm. The glans penis was very well$ H8 e' e3 e9 A% g0 h5 H
developed. The pubic hair was Tanner II, mostly around
3 W H) R; F- V2 J540! h" |, ?8 N" F% O# s2 \
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- f9 R- d# K- s1 n" Y" Dthe base of the phallus and was dark and curled. The
% N# b1 [1 [; [& o! e: e" Qtesticular volume was prepubertal at 2 mL each.1 W( W) _# J# v( f
The skin was moist and smooth and somewhat
' f# f7 o8 z8 L$ R! O. Foily. No axillary hair was noted. There were no! Y. b' _3 i( A. O$ T; R _- v0 P2 v
abnormal skin pigmentations or café-au-lait spots.: ]: C# d9 X7 W
Neurologic evaluation showed deep tendon reflex 2+* `: { A* ?# z% M1 D
bilateral and symmetrical. There was no suggestion; P$ [+ Y+ x2 w9 i3 m% T+ l
of papilledema.
1 [ D4 u% Y( g' Q# p: \) uLaboratory Evaluation
0 |& o1 ~) @: S+ @& VThe bone age was consistent with 28 months by/ y( Y9 u- R. h* c- i$ G
using the standard of Greulich and Pyle at a chrono- K- H+ M& A; j Z8 Y
logic age of 16 months (advanced).5 Chromosomal
" D5 f6 r; _+ k+ x1 rkaryotype was 46XY. The thyroid function test
& @- w. o; g6 i7 C" S. L5 x5 f" xshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
0 m) s+ @ i/ ^/ x: c8 ~0 x8 O( `lating hormone level was 1.3 µIU/mL (both normal).. }% W2 e/ c* ?5 \
The concentrations of serum electrolytes, blood
) z1 w( q, v% uurea nitrogen, creatinine, and calcium all were
' k4 C0 f5 w1 h$ Z& Q8 X: _within normal range for his age. The concentration
# p6 t# P9 {7 Y; `. y$ h# xof serum 17-hydroxyprogesterone was 16 ng/dL# B* R) _: v6 ~& d6 L% ]
(normal, 3 to 90 ng/dL), androstenedione was 20& }; U6 z, ?2 w/ Y. }2 f
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-0 U1 U8 @0 Z0 O4 `
terone was 38 ng/dL (normal, 50 to 760 ng/dL),7 ?4 G6 I+ f2 U1 F
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
3 G6 \& G5 f- j4 I9 v+ J5 I5 {49ng/dL), 11-desoxycortisol (specific compound S)$ {" O8 b7 d7 I. T/ m* O
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
6 V( _* g0 i' htisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
) q7 ?$ O( e# Ttestosterone was 60 ng/dL (normal <3 to 10 ng/dL),1 b R; ~ ` t* a; M* `, v
and β-human chorionic gonadotropin was less than
+ }$ ? P* Q6 ]: T' X8 i5 mIU/mL (normal <5 mIU/mL). Serum follicular
) L1 R* n) D: V1 K4 ?) X* y8 ustimulating hormone and leuteinizing hormone
; p# ?# a% m4 gconcentrations were less than 0.05 mIU/mL
6 q$ v8 p) J/ d3 D(prepubertal).
0 p: ?: a* K- f% X2 \) @9 cThe parents were notified about the laboratory& D% P# t; s9 L! E% A
results and were informed that all of the tests were6 P5 z$ b' ?2 [- k, H
normal except the testosterone level was high. The
7 W5 m3 {- n, x5 Q3 M0 xfollow-up visit was arranged within a few weeks to
, f, c: s b! t: M5 Zobtain testicular and abdominal sonograms; how-
' n) R6 [& Q% G, p& a. |6 Q" _+ F: aever, the family did not return for 4 months.
* `, M3 R9 l- k6 j% A( i9 W7 aPhysical examination at this time revealed that the
3 W; H/ w8 k# \. ~) U% V2 ^1 D9 Pchild had grown 2.5 cm in 4 months and had gained7 X- ~) r5 h8 l, f0 h) l8 i6 l
2 kg of weight. Physical examination remained
% T4 t; W' R5 `# hunchanged. Surprisingly, the pubic hair almost com-5 l$ m& p% `; F: v8 |
pletely disappeared except for a few vellous hairs at% {0 I" n4 z6 c* \- |
the base of the phallus. Testicular volume was still 2
; L% g( L1 N$ I F2 o7 JmL, and the size of the penis remained unchanged.( Y" F* W! {8 z7 N" Z
The mother also said that the boy was no longer hav-. i& |) T! ^9 N |% ^0 t
ing frequent erections.$ x. e: |" o5 b+ J3 F
Both parents were again questioned about use of& _) i# K2 f! E0 \
any ointment/creams that they may have applied to. ? P! G3 S( \
the child’s skin. This time the father admitted the
8 u: E9 `9 d, I5 ?- _Topical Testosterone Exposure / Bhowmick et al 541
2 i9 b- H1 u. P7 m- I8 g5 ?& S& z7 cuse of testosterone gel twice daily that he was apply-: e* ]# i# T a1 t, r$ A
ing over his own shoulders, chest, and back area for
- v$ L' A+ U5 F! w z, `" ^a year. The father also revealed he was embarrassed; Q$ J1 R% I$ m r! Y0 y' \
to disclose that he was using a testosterone gel pre-
* b: s4 O; c; H5 n0 o3 t- sscribed by his family physician for decreased libido
4 \# H) c2 U5 [( rsecondary to depression.& l: {* z; O. d8 M* s3 c- f
The child slept in the same bed with parents.+ A2 Q1 d2 x; d3 G4 T4 h5 }* S8 L
The father would hug the baby and hold him on his
9 [$ e8 \: S* k# g1 echest for a considerable period of time, causing sig-
% b; p, k7 Z, a9 `. anificant bare skin contact between baby and father.
; e d3 @ I" I7 c- xThe father also admitted that after the phone call,
6 a& V9 d" i$ Uwhen he learned the testosterone level in the baby! q( Z5 B9 f6 G
was high, he then read the product information
0 |6 t, g6 S% y, dpacket and concluded that it was most likely the rea-- c/ {7 D @% l+ a G3 a
son for the child’s virilization. At that time, they
) B* a, e A! u8 zdecided to put the baby in a separate bed, and the& S$ j1 B- |: `1 G( @# @
father was not hugging him with bare skin and had
) m' G$ J. f! p; L0 v+ q+ y0 dbeen using protective clothing. A repeat testosterone
3 v! y$ w2 c# ?4 d) ~test was ordered, but the family did not go to the- `( I- X* y1 |3 B i
laboratory to obtain the test.
1 I% B6 E, x1 B4 N: H; \Discussion, p! x5 s* D+ J* w- S
Precocious puberty in boys is defined as secondary. E: S5 B3 x! L7 Y: m+ f
sexual development before 9 years of age.1,4
1 w F7 j4 A. P! u; p# mPrecocious puberty is termed as central (true) when
' }& G: Q8 R# rit is caused by the premature activation of hypo-0 a' X* g% r7 |" C
thalamic pituitary gonadal axis. CPP is more com-0 c0 k+ D) m+ _# Y9 f$ y
mon in girls than in boys.1,3 Most boys with CPP$ g9 I2 ~4 Y2 ^* G" h1 `. C
may have a central nervous system lesion that is7 S- X7 K( Q- Y7 H k* B1 q& ^
responsible for the early activation of the hypothal-- y. H f9 }. m5 ]; F' p
amic pituitary gonadal axis.1-3 Thus, greater empha-
- ~' y, O* P+ y! v* Msis has been given to neuroradiologic imaging in2 H) s; Y0 I! S; d3 f# ^8 m) \% y4 l
boys with precocious puberty. In addition to viril-9 }1 C [+ R- {
ization, the clinical hallmark of CPP is the symmet-
, [! o" l2 I: @3 K. a2 crical testicular growth secondary to stimulation by
; Y- S% l$ ~5 P8 ~4 i6 f, qgonadotropins.1,3
8 T8 b7 Y9 q( Q0 C, y5 H5 lGonadotropin-independent peripheral preco-
. ^4 z# _) @& Y( K! S+ Rcious puberty in boys also results from inappropriate
+ c) G: M% y h6 t" Handrogenic stimulation from either endogenous or7 t5 w% C% G/ t2 A' d _+ O5 p
exogenous sources, nonpituitary gonadotropin stim-1 ?& t' @; A8 i
ulation, and rare activating mutations.3 Virilizing
9 T5 F+ k0 {( d4 T$ @congenital adrenal hyperplasia producing excessive7 l7 {2 u% N( l6 e7 N0 n
adrenal androgens is a common cause of precocious
: a* g! t V1 v1 Upuberty in boys.3,4
# i; V% l2 u+ t& i, `6 fThe most common form of congenital adrenal$ B3 r. u4 b0 ?
hyperplasia is the 21-hydroxylase enzyme deficiency.3 t# J3 F( I0 c7 y' G" j0 b, w* @; [
The 11-β hydroxylase deficiency may also result in9 h# |6 }* z, ]1 F) q. E' R
excessive adrenal androgen production, and rarely,
* r% h7 V* n8 |, v- ?: ean adrenal tumor may also cause adrenal androgen
6 |, y$ r6 u9 J" D, R% c' Vexcess.1,3
8 ^" H- A- \% I. u1 \ ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 q+ r7 R' v* G1 h
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007# J, \4 {/ b! m/ V+ l1 H$ s4 A0 C
A unique entity of male-limited gonadotropin-
/ m0 C& T: q' S+ S! @$ H) {; {; Gindependent precocious puberty, which is also known
6 U" c& _8 g( Pas testotoxicosis, may cause precocious puberty at a; B. p) C9 Z4 W! m+ m
very young age. The physical findings in these boys
' I" y+ ^0 p' v7 Cwith this disorder are full pubertal development,
1 C2 m0 k1 R# Y9 _including bilateral testicular growth, similar to boys3 o/ I3 k# b" L$ B1 h
with CPP. The gonadotropin levels in this disorder
9 }" i& O1 f) s! g( o& I) U: Hare suppressed to prepubertal levels and do not show& H ~; b0 k8 T0 h
pubertal response of gonadotropin after gonadotropin-
2 k: r6 o8 u! l( |releasing hormone stimulation. This is a sex-linked8 R- t: }$ D6 `" r" V
autosomal dominant disorder that affects only1 b$ B a r5 n6 j4 g
males; therefore, other male members of the family
# Z" l8 ^8 w" {: `) U: ^. K, n4 u6 m& \may have similar precocious puberty.3
0 ]9 s9 g9 c# IIn our patient, physical examination was incon-& q v% b+ {( T' g* \
sistent with true precocious puberty since his testi-8 C& t0 b% C6 o0 Z. D
cles were prepubertal in size. However, testotoxicosis: R7 a$ E: o7 b: e
was in the differential diagnosis because his father
) P9 p. e. p5 Q- Q% gstarted puberty somewhat early, and occasionally,
" L0 ]! w n4 p4 m5 E! _- Qtesticular enlargement is not that evident in the
4 @2 g7 u$ w6 cbeginning of this process.1 In the absence of a neg-) a/ t' O& y- i+ ]" k
ative initial history of androgen exposure, our
! |* g' U+ ^/ y0 a$ N" D, x. Gbiggest concern was virilizing adrenal hyperplasia," n$ K, |3 e# \# ?5 Z3 \
either 21-hydroxylase deficiency or 11-β hydroxylase8 g$ J- k. k5 _, w4 i
deficiency. Those diagnoses were excluded by find-
" _9 ?7 a! U, O+ uing the normal level of adrenal steroids.
* z7 H- v. b( N/ _# v8 Y+ PThe diagnosis of exogenous androgens was strongly; ]; k+ ~$ o- q* B2 u
suspected in a follow-up visit after 4 months because
- B4 {7 e. N; m' b$ ~the physical examination revealed the complete disap-
7 M' g0 M) Y3 L x, _3 d0 A( j9 Tpearance of pubic hair, normal growth velocity, and
: F" H3 `* S: ]- r- E" K" tdecreased erections. The father admitted using a testos-4 E9 `7 E# r% g, P( v3 l+ t6 X+ t
terone gel, which he concealed at first visit. He was' J g0 U; ^" n( g7 Q9 Z
using it rather frequently, twice a day. The Physicians’2 |' Q% p1 V4 K
Desk Reference, or package insert of this product, gel or
- C0 G/ F) Y. F9 M2 H" ?0 k% o0 Dcream, cautions about dermal testosterone transfer to' |/ ~- ^6 ]7 f' b" |$ w
unprotected females through direct skin exposure.
; c" u9 i1 P" B4 {$ P7 QSerum testosterone level was found to be 2 times the
6 z% a9 |! R. R1 {' c8 z* }% D5 abaseline value in those females who were exposed to
, Z) _( |) R8 O9 e8 J% Qeven 15 minutes of direct skin contact with their male
* f6 y6 K; \# h/ Spartners.6 However, when a shirt covered the applica-
3 N1 Z1 H9 Y) P2 qtion site, this testosterone transfer was prevented.
+ d: X3 {7 K5 r$ z& S0 p' G6 VOur patient’s testosterone level was 60 ng/mL,- F, a, e9 n" f+ o
which was clearly high. Some studies suggest that6 `& w; b* O6 Z4 E, i) f+ O: A: j% s
dermal conversion of testosterone to dihydrotestos-
/ t2 ]+ a1 I$ b* |terone, which is a more potent metabolite, is more
% D( {( W2 C8 F' z; J! J- yactive in young children exposed to testosterone
4 C9 V/ m5 m* O: G, U5 d, vexogenously7; however, we did not measure a dihy-
8 Z& t. g. U7 X f0 ?8 y9 p: T4 m( @drotestosterone level in our patient. In addition to/ ^5 Z" ^: b$ ~
virilization, exposure to exogenous testosterone in
9 {+ d# S$ }7 y! f2 w# g% Ychildren results in an increase in growth velocity and
0 R; g5 w" X; k7 E2 madvanced bone age, as seen in our patient.
! L1 z! M* G' S" eThe long-term effect of androgen exposure during
0 W N+ u( J: \) c* Q+ S) hearly childhood on pubertal development and final' H$ ` j4 J; ] t6 N4 l
adult height are not fully known and always remain+ C7 W' s' k( l' l
a concern. Children treated with short-term testos-
: P$ T8 J7 P3 K" y( xterone injection or topical androgen may exhibit some
* p# B; \8 b- Q# i& jacceleration of the skeletal maturation; however, after
H N4 [1 e5 e9 C! ocessation of treatment, the rate of bone maturation# f' A' f! W, H; ~- x B
decelerates and gradually returns to normal.8,96 B7 n: t6 s( L2 p* d
There are conflicting reports and controversy6 D0 j; U C, f+ w
over the effect of early androgen exposure on adult
( H9 x" y$ Q, f. dpenile length.10,11 Some reports suggest subnormal/ S! E2 D4 R( |+ [( s; ^$ z) {
adult penile length, apparently because of downreg-+ i3 i+ J# W) T6 H$ z
ulation of androgen receptor number.10,12 However,
9 f9 ?$ y+ O+ F& y. X0 X+ BSutherland et al13 did not find a correlation between# l% M* z6 S/ d4 s+ s
childhood testosterone exposure and reduced adult
/ Z9 N2 {5 k u! P" k( i! K4 X- Ipenile length in clinical studies.1 h: _# U q4 a. ?7 k6 f! @: c
Nonetheless, we do not believe our patient is
# S+ T! T' A {going to experience any of the untoward effects from+ k( c: @# ~2 H0 F) l8 |2 M& n
testosterone exposure as mentioned earlier because
6 D, M5 H5 J8 w2 O4 C1 O, Othe exposure was not for a prolonged period of time.2 U) n: K( `7 m9 M) M
Although the bone age was advanced at the time of
) b4 t8 }5 w" t. b# h$ T2 Adiagnosis, the child had a normal growth velocity at' I2 P$ j1 V( W% s4 Y" u, X# p8 G
the follow-up visit. It is hoped that his final adult
" E0 u6 ^- O( z, p1 ]* B C `" Fheight will not be affected.
8 P% h' Y! ^' _5 O! H+ IAlthough rarely reported, the widespread avail-
& ?% j+ [: X( K0 H g5 O5 N fability of androgen products in our society may$ Z! E2 ], a$ F5 w V, T) I$ P
indeed cause more virilization in male or female" S% q4 h, a5 x6 c
children than one would realize. Exposure to andro-) ]9 x, w( U7 {" t9 M% U0 q
gen products must be considered and specific ques-. L+ y8 @! f; H3 Z
tioning about the use of a testosterone product or
1 _: J' z# A L2 D( _# Xgel should be asked of the family members during% H0 k: E6 h* C# B
the evaluation of any children who present with vir-
3 y5 M, Z- z& N& r5 \ilization or peripheral precocious puberty. The diag-
% X P2 G# |6 ?+ q# \/ @nosis can be established by just a few tests and by
/ L/ [4 E' A# Gappropriate history. The inability to obtain such a
: C/ u6 [% [! C R, ehistory, or failure to ask the specific questions, may3 j F7 L B g+ m
result in extensive, unnecessary, and expensive, n# W2 C. \6 ?, _- J* g
investigation. The primary care physician should be
( I2 y8 E0 `8 _1 n. {, waware of this fact, because most of these children$ x7 I7 f+ c0 J. Y+ G4 T6 w
may initially present in their practice. The Physicians’& i7 X4 {8 m$ R# G9 @4 ]
Desk Reference and package insert should also put a
2 Y9 X+ i' u0 K8 V: J+ lwarning about the virilizing effect on a male or
, E: c! G2 `+ ~4 C) H$ T, S6 ^2 wfemale child who might come in contact with some-
8 v* ?. K) d9 ^% ?5 q( None using any of these products.
9 r, ] d; K+ J I7 OReferences# }/ b) t4 _3 s9 P" O; W r
1. Styne DM. The testes: disorder of sexual differentiation
& p! H. r$ ^ Nand puberty in the male. In: Sperling MA, ed. Pediatric# H' m3 U" E% ]6 H) h0 b
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;, z; J- U+ S) \; i) E+ g
2002: 565-628.
% W; Y9 K E1 ^* }3 W% ^2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
1 c6 f$ |( Z' \& vpuberty in children with tumours of the suprasellar pineal
/ C {6 a0 s1 `" c. Gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. \5 t( P0 p6 b9 CTopical Testosterone Exposure / Bhowmick et al 543
: o G" x9 n, b5 C2 [' ^- zareas: organic central precocious puberty. Acta Paediatr.) W; ]! `9 |: r$ e, v( f; `
2001;90:751-756.
* a* x, o$ I: M& f6 D# I& m* l3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
+ ?' ]6 Y5 a% e; Y. }0 t" ?0 ePediatric Endocrinology. 4th ed. New York, NY: Marcel
' H& l& A4 L$ `1 FDekker Inc; 2003:211-238.5 x, ^7 d6 _4 J* v9 E9 r$ }8 h
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual/ e" H0 G; ~+ T0 g5 W
development in a two-year-old boy induced by topical; j- w* R w! d# i
exposure to testosterone. Pediatrics. 1999;104:e23.
+ c4 M8 _' u( e+ y) c2 F3 |5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
- b5 I3 l( M( T4 o ^) }) {/ `6 qSkeletal Development of the Hand and Wrist. 2nd ed.
3 w* w( @" o. [Stanford, CA: Stanford University Press; 1959.2 m* K: J. q2 V0 _
6. Physicians’ Desk Reference. Androgel 1% testosterone,
' e1 {4 b {, z2 l8 d0 O% PUnimed Pharmaceutical Inc. Montvale, NJ: Medical2 N2 ?. Z4 |& |+ _8 |. S0 E5 A {" ?8 z
Economics Company, Inc; 2004:3239-3241.3 `9 l8 d: A/ J5 t2 N& Q
7. Klugo RC, Cerny JC. Response of micropenis to topical; L9 ^' u+ C' A( j9 u- g
testosterone and gonadotropin. J Urol. 1978;119:
' h! g0 B: u9 k5 f! M; Z. p667-668./ g3 F2 {6 Q% M4 b* S& l6 u0 v/ n
8. Guthrie RD, Smith DW, Graham CB. Testosterone3 n; [7 g S. J' g
treatment for micropenis during early childhood. J Pediatr.
: ]6 n: c5 h( a' J: S& l$ u) n1973;83:247-252.& m( ~- a! O7 D. K
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone1 V, U) n( m8 D( Y! i. a; |
therapy for penile growth. Urol. 1975;6:708-710.
; Z& ^6 O) m# i9 U10. Husmann DA, Cain MP. Microphallus: eventual phallic
2 \+ d9 l5 h9 u& g8 }- Ysize is dependent on the timing of androgen administra-
# j! v( X5 N% J- Xtion. J Urol. 1994;152:734-739.1 }7 ~& R9 h0 w( f8 Y. Z! w- |
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
% ]$ u8 v: _3 }does early treatment with testosterone do more harm
* C7 p) h0 ]# P- o$ Xthan good? J Urol. 1995;154:825-829.
/ C! i% @! `( ]. c12. Takane KK, George FW, Wilson JD. Androgen receptor; Y; y# D7 P( W; j, c
of rat penis is down-regulated by androgen. Am J Physiol.
' n$ c* }* |! L7 }$ ~ [8 [6 A1990;258:E46-E50.6 Z* f5 ?% m3 |1 h; f+ `
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect; O F4 L$ R& {$ p9 o
of prepubertal androgen exposure on adult penile
: L) g: ]6 ^% O3 h9 y3 Rlength. J Urol. 1996;156:783-787. |
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