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is a significant concern for physicians. Central
8 v: {* K" n4 Jprecocious puberty (CPP), which is mediated
9 P9 E' c; f( {, uthrough the hypothalamic pituitary gonadal axis, has8 V+ K# Z1 F ?, m
a higher incidence of organic central nervous system
; ]; J2 q- b2 Q: w6 \: Plesions in boys.1,2 Virilization in boys, as manifested' W2 n- O4 {" u0 H( `# ? |
by enlargement of the penis, development of pubic
% M# l5 R4 h/ J j6 S% A3 mhair, and facial acne without enlargement of testi-8 v' X2 ~8 w/ a+ x
cles, suggests peripheral or pseudopuberty.1-3 We$ C1 _. t& p/ E8 L+ {
report a 16-month-old boy who presented with the4 ?8 Z; `) Z I/ |8 k$ ^
enlargement of the phallus and pubic hair develop-/ ]: M! m- \3 f1 m6 l2 J
ment without testicular enlargement, which was due/ b% ]6 F# S' B% s q
to the unintentional exposure to androgen gel used by, c0 |& [( b. a% c
the father. The family initially concealed this infor-& m2 U4 u1 d+ A5 u
mation, resulting in an extensive work-up for this
) T, m p: |: i* }! f& M; Fchild. Given the widespread and easy availability of
, t2 g5 {9 R2 o6 R; stestosterone gel and cream, we believe this is proba-' T, F+ l0 j5 A5 {% ~6 E& _# _
bly more common than the rare case report in the
9 x" }% K$ i; _$ G, Y+ Cliterature.4' p$ p6 F& a0 h, A; D% [+ U+ s
Patient Report
# R1 n s1 ~+ U; ?A 16-month-old white child was referred to the
: w! X& r, V, ^9 j7 X4 v1 e9 Hendocrine clinic by his pediatrician with the concern' x4 x' x* ]/ K& K6 V! Z4 {
of early sexual development. His mother noticed4 p0 K- ?* A& W" ~& K
light colored pubic hair development when he was6 e8 Y7 g4 i8 p5 y0 f+ W
From the 1Division of Pediatric Endocrinology, 2University of
6 K+ b! j4 T2 }6 R& \South Alabama Medical Center, Mobile, Alabama.
- F- S! c( e9 FAddress correspondence to: Samar K. Bhowmick, MD, FACE,
# J) T& A8 i) B' M* m2 B* {Professor of Pediatrics, University of South Alabama, College of
8 G3 z5 L/ x7 n' I6 r# x$ `Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
4 u3 F, Y0 ?- Ie-mail: [email protected].# r( \5 |8 M* A2 w; W4 ~1 |
about 6 to 7 months old, which progressively became
+ g o0 W2 n; n! E) ~ \8 Zdarker. She was also concerned about the enlarge-3 d/ W; _( b( W/ ~% x9 t6 w! R8 {
ment of his penis and frequent erections. The child
& e) j. D$ A$ q) bwas the product of a full-term normal delivery, with
, J6 E! j% _& V0 ra birth weight of 7 lb 14 oz, and birth length of! g8 y7 Y- z: O% X5 M4 U2 Y% r7 m
20 inches. He was breast-fed throughout the first year
& B. c8 F7 I+ X' Sof life and was still receiving breast milk along with
$ v1 f- I* n6 y) o E1 nsolid food. He had no hospitalizations or surgery,2 t0 W3 @: j5 x* n4 I
and his psychosocial and psychomotor development
6 x; y K0 L$ H( `, x' gwas age appropriate.! S5 N9 [2 `; W7 n
The family history was remarkable for the father,
* K7 u) U: |. R/ y, Fwho was diagnosed with hypothyroidism at age 16,/ A Y% d# u: K% j
which was treated with thyroxine. The father’s
0 G" O6 i( T% G) @% mheight was 6 feet, and he went through a somewhat
: R+ y D' w, w# F& y3 dearly puberty and had stopped growing by age 14.
2 H. t6 T0 t# H! @/ A' S3 lThe father denied taking any other medication. The
9 @. z" _# `) R* y6 ^child’s mother was in good health. Her menarche; k% d6 R' }. C0 I( _
was at 11 years of age, and her height was at 5 feet! z# L; o2 @9 s. J3 Z
5 inches. There was no other family history of pre-
# c A( {/ p, ncocious sexual development in the first-degree rela-, B& l3 Q$ }9 U- p( E, I7 t
tives. There were no siblings.
* G% x* j& |. ^( I+ U. hPhysical Examination- @5 `: x% M" J6 J Y+ q
The physical examination revealed a very active,
& d( D. H6 A! ~* @' L. splayful, and healthy boy. The vital signs documented
* ^ `+ Q7 A' la blood pressure of 85/50 mm Hg, his length was
- c+ Q9 k7 O$ f- h1 }7 p R90 cm (>97th percentile), and his weight was 14.4 kg' |+ k% s& n$ A% o
(also >97th percentile). The observed yearly growth; n, d( L* P a. Z: {
velocity was 30 cm (12 inches). The examination of
; b! r2 T7 o) X) Fthe neck revealed no thyroid enlargement.0 O7 c2 b$ G9 P7 z' v
The genitourinary examination was remarkable for
! p5 V; I2 R$ ]+ y" E" Kenlargement of the penis, with a stretched length of% D; F* i& K) j+ K: `% G4 i
8 cm and a width of 2 cm. The glans penis was very well2 c! s; c# F5 ]
developed. The pubic hair was Tanner II, mostly around1 h/ k4 d& ^3 f, }' N
540
! s6 R' k, ~0 k3 fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& z7 C. w. K7 ^5 athe base of the phallus and was dark and curled. The; u/ }. R* F# q# ], n9 E4 m0 B
testicular volume was prepubertal at 2 mL each.
' T" _% L! Q, z; a; {' tThe skin was moist and smooth and somewhat
; w& U. X/ n0 d' Toily. No axillary hair was noted. There were no
- _) z1 F: I J" U; G* S Rabnormal skin pigmentations or café-au-lait spots.! l8 r7 O0 q* d9 }
Neurologic evaluation showed deep tendon reflex 2+
u- h' ~" e0 ] h8 [2 w9 Pbilateral and symmetrical. There was no suggestion+ n2 j' E% k) D$ H& h
of papilledema.; i/ Y8 A% t5 ?) r% {
Laboratory Evaluation8 h' l# U- J3 N6 z5 ~6 l( c7 O9 f, l4 d
The bone age was consistent with 28 months by
3 {2 ^$ W! C" f1 N4 Z6 xusing the standard of Greulich and Pyle at a chrono-0 ?7 Z: y' \* ?* e
logic age of 16 months (advanced).5 Chromosomal4 e* s2 z9 h, a7 b
karyotype was 46XY. The thyroid function test6 K' C2 i/ [4 b5 t8 P
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
4 u0 n2 M% h- m7 p% i+ W7 Ulating hormone level was 1.3 µIU/mL (both normal).
0 ]7 @- F' s- d# i. d2 c( HThe concentrations of serum electrolytes, blood( ]4 y, D1 y. H) p. R
urea nitrogen, creatinine, and calcium all were% v5 v% j7 x+ G6 h% u5 u0 X9 R
within normal range for his age. The concentration
, X( e5 R0 k- V# mof serum 17-hydroxyprogesterone was 16 ng/dL' C( [8 z( ]7 L$ v& F& c" h
(normal, 3 to 90 ng/dL), androstenedione was 206 v! H- S' K/ F; {$ m$ w- K2 |
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-+ J) ?6 n( T. k
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
+ c: d: t; ~7 b7 t# t4 Edesoxycorticosterone was 4.3 ng/dL (normal, 7 to
' N( I5 u* N/ B49ng/dL), 11-desoxycortisol (specific compound S)
( H! B. q2 Y/ o, a0 J2 Cwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
0 l6 h+ O. [! \# a9 j. D4 G! M/ jtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
1 p5 o+ e2 n6 m3 Ztestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
& ~5 q8 [& X6 o! @, k% |and β-human chorionic gonadotropin was less than1 O, t$ h% W9 a' @* S* z
5 mIU/mL (normal <5 mIU/mL). Serum follicular9 y6 u2 @5 ^7 g8 A
stimulating hormone and leuteinizing hormone
& d6 L7 f0 E: M! C5 J: gconcentrations were less than 0.05 mIU/mL
: C( N+ t/ Y R(prepubertal).! O6 g F3 @. ^; {9 E6 D
The parents were notified about the laboratory
& Z, p7 U- f9 Wresults and were informed that all of the tests were2 K; ^1 F+ w; h
normal except the testosterone level was high. The" e b. x+ Y+ ]
follow-up visit was arranged within a few weeks to8 U) S2 F' m1 u4 p
obtain testicular and abdominal sonograms; how-
4 ~" J! e5 S! p4 R$ H' ~ever, the family did not return for 4 months.5 u: D% Y$ B1 Q$ D, N( N
Physical examination at this time revealed that the: s# m2 s" B" d/ h/ u
child had grown 2.5 cm in 4 months and had gained+ L7 j3 Z$ K1 |4 r& |
2 kg of weight. Physical examination remained0 Z4 F' q2 Y6 n- F- Q
unchanged. Surprisingly, the pubic hair almost com-7 i$ B& ` |' [+ ~5 |1 E M, L
pletely disappeared except for a few vellous hairs at
; F2 i& x7 K3 A* W& O1 xthe base of the phallus. Testicular volume was still 2
- Z" |2 l2 b+ ~- umL, and the size of the penis remained unchanged.
. P$ v' b }; }7 r/ ~/ z4 wThe mother also said that the boy was no longer hav-
* ~8 U- ~- d8 v. ^/ `# I% Ting frequent erections.9 Y: n1 r1 y; F4 q4 ]! U; l2 Q' j- y
Both parents were again questioned about use of
/ L9 t1 t- z( P. R9 ^any ointment/creams that they may have applied to
5 F* J. A5 s8 c; f! b6 w/ v6 Zthe child’s skin. This time the father admitted the
9 ]9 Y- n4 H) Y3 ~Topical Testosterone Exposure / Bhowmick et al 541
3 [+ k- B9 w5 a/ w U8 a5 i& yuse of testosterone gel twice daily that he was apply-6 q4 H' r8 z: Q M. f4 @, @+ `
ing over his own shoulders, chest, and back area for, z0 a% C$ f$ b0 h" K
a year. The father also revealed he was embarrassed+ V8 J" ?7 r/ h8 P! Z$ e' o( s, p I8 \
to disclose that he was using a testosterone gel pre-
& J! v% i4 U d! H" |scribed by his family physician for decreased libido
+ q0 E9 L/ X9 V+ [$ G# Osecondary to depression.
5 f8 g) }3 G4 R! n: @The child slept in the same bed with parents.9 |9 h7 \' V. t2 o7 L
The father would hug the baby and hold him on his
) D# O& F2 M. K7 q! ?chest for a considerable period of time, causing sig-* N- D; |& s7 p8 j0 g6 V# N* ?
nificant bare skin contact between baby and father.) ]- c' c# W" h- [) a/ I
The father also admitted that after the phone call,4 I6 H/ O: j8 D* Y9 I
when he learned the testosterone level in the baby4 g" ]7 v0 L3 J7 D2 A* C
was high, he then read the product information
4 j/ s# x" @! xpacket and concluded that it was most likely the rea-
2 Y& h; H9 E, k' C; f, ], Cson for the child’s virilization. At that time, they
8 A7 j( _7 b' F' c( |decided to put the baby in a separate bed, and the" |# C; Y- U6 s' f
father was not hugging him with bare skin and had
) B. d$ ~4 w6 h) Ubeen using protective clothing. A repeat testosterone
# D5 i" M6 z3 q+ f% ]test was ordered, but the family did not go to the% |- F5 P/ W, J! ^3 D9 N* h% a
laboratory to obtain the test./ ?$ t b2 n6 F+ {( y
Discussion. ^2 T2 B* i G0 r
Precocious puberty in boys is defined as secondary: z( t6 Q* W8 q0 T! y7 i1 H y0 l
sexual development before 9 years of age.1,4
( [1 y& b% Z; g, {( j0 a+ CPrecocious puberty is termed as central (true) when
, B J9 e% m) X) ^it is caused by the premature activation of hypo-" f' [ t+ |+ L" c
thalamic pituitary gonadal axis. CPP is more com-
, W: E& w4 Z! K7 R* q3 f: }mon in girls than in boys.1,3 Most boys with CPP( p( d, M/ J: R; X7 J. V% v
may have a central nervous system lesion that is
% \8 e/ {" ^: \: I* o2 rresponsible for the early activation of the hypothal-2 v: z2 N( p$ h
amic pituitary gonadal axis.1-3 Thus, greater empha-
5 a. f4 Q# H; L7 Qsis has been given to neuroradiologic imaging in, W/ t4 G7 J# n) N* ^
boys with precocious puberty. In addition to viril-. m- o5 G2 v0 ]% B; g
ization, the clinical hallmark of CPP is the symmet-$ W1 I0 \% k, x B$ Y$ ^: x2 ]
rical testicular growth secondary to stimulation by
c7 j6 N% F" `* x. ]/ X; f1 v @% Ugonadotropins.1,3
' B- h( \4 X& F2 m0 q- ~Gonadotropin-independent peripheral preco-
5 ]8 q V7 h+ t( y- lcious puberty in boys also results from inappropriate
1 Z/ p. n- S. `androgenic stimulation from either endogenous or
* V' j% q/ Y. t b( x+ y: x# sexogenous sources, nonpituitary gonadotropin stim-' m, O$ @ |9 g0 _1 R8 [1 u0 D
ulation, and rare activating mutations.3 Virilizing
$ z: H& r2 e; `$ Qcongenital adrenal hyperplasia producing excessive; @/ e! w5 Z ]: z8 j: f% V
adrenal androgens is a common cause of precocious
; L8 |/ k/ n2 |. ]puberty in boys.3,4
, S' W; b4 i8 X1 _3 n4 o bThe most common form of congenital adrenal
+ @& R# M3 T4 P( } w. Vhyperplasia is the 21-hydroxylase enzyme deficiency.
5 {* o0 F9 O- u1 ~& @; OThe 11-β hydroxylase deficiency may also result in
/ v% z) F% ^' G) ?* e) z: ^excessive adrenal androgen production, and rarely,% D" q" D0 E& K6 q) @& O. h, c1 U& Z
an adrenal tumor may also cause adrenal androgen1 J% Q4 E+ {6 V0 H4 O
excess.1,3
' Q$ u* e7 @0 eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( ^, F7 g3 c) ~( ^" R
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007, \+ ^% ], _; w
A unique entity of male-limited gonadotropin-' p0 D( g# Z, l+ W2 T+ g" H* s0 }
independent precocious puberty, which is also known
; ?( `4 z6 r+ h; o1 l3 ]! o) l1 Was testotoxicosis, may cause precocious puberty at a& P) R: S: t8 T( K
very young age. The physical findings in these boys7 F3 l3 B3 a1 U* h8 B J: |% O
with this disorder are full pubertal development,( r3 l& A* W: K; d$ g) m k) N
including bilateral testicular growth, similar to boys
}7 J N! G3 c) l f# L) o3 w8 V- twith CPP. The gonadotropin levels in this disorder
5 I% O6 @1 i" }# xare suppressed to prepubertal levels and do not show7 f! m8 ~4 q2 `5 `$ d
pubertal response of gonadotropin after gonadotropin-: v* i+ J: |4 A# @: B2 X) i+ z
releasing hormone stimulation. This is a sex-linked
0 x4 X: K+ F; }( |* gautosomal dominant disorder that affects only
7 G% p; n: D# q Amales; therefore, other male members of the family; x% t* q" O8 }: `1 V2 G
may have similar precocious puberty.3
3 K7 Q* s) s" y8 MIn our patient, physical examination was incon-
& N* ^+ g! P5 w* Vsistent with true precocious puberty since his testi-
# D+ d7 G; Y; t; jcles were prepubertal in size. However, testotoxicosis
; Y- b! d! l/ C- _! ewas in the differential diagnosis because his father
/ z2 ]& z7 p4 lstarted puberty somewhat early, and occasionally,7 N( e: d5 J) Y6 d* ~. Q1 l
testicular enlargement is not that evident in the- C. Y8 |8 H. \
beginning of this process.1 In the absence of a neg-0 E. C5 A- T0 z7 ~
ative initial history of androgen exposure, our
# N5 L, M) }( W) ~8 gbiggest concern was virilizing adrenal hyperplasia,
6 r0 i9 B L; keither 21-hydroxylase deficiency or 11-β hydroxylase
1 N; Q1 ?& G5 o8 Edeficiency. Those diagnoses were excluded by find-# P3 w& j9 s, s. A# ~% \
ing the normal level of adrenal steroids.
) [% Z( k) j8 K: OThe diagnosis of exogenous androgens was strongly5 w- w# A1 B/ w! E- n: B" Z0 p
suspected in a follow-up visit after 4 months because
2 i4 m* [( J9 j9 P: ?7 m0 `, v* Q pthe physical examination revealed the complete disap-
8 n' c$ t* q% r: t# T2 T. |pearance of pubic hair, normal growth velocity, and
/ m3 L; A7 ? v4 f/ b3 Kdecreased erections. The father admitted using a testos-. L$ G: e% N; D! M! F! [2 G& ~
terone gel, which he concealed at first visit. He was
. ]5 R6 V3 l. g/ u& `7 zusing it rather frequently, twice a day. The Physicians’
9 g8 I' i7 a* o/ |# A% }+ @' iDesk Reference, or package insert of this product, gel or
, Y% e! N0 H/ ^; U, {3 Wcream, cautions about dermal testosterone transfer to
1 Y9 H+ u' _( Y6 |unprotected females through direct skin exposure.
, C8 Y0 l G% \+ i" CSerum testosterone level was found to be 2 times the* `4 o+ {- o! v, Z3 x
baseline value in those females who were exposed to
Y8 r8 Z( A1 S8 R: a4 I* A0 meven 15 minutes of direct skin contact with their male
& q0 `& N- H f+ o K* v9 Rpartners.6 However, when a shirt covered the applica-
( s4 W7 @) z( |8 B: k8 s- e1 {# qtion site, this testosterone transfer was prevented.9 T8 s2 C3 m3 X% C: @! d7 Z
Our patient’s testosterone level was 60 ng/mL,% o0 O- K- r" I" n$ R
which was clearly high. Some studies suggest that- n m8 @+ D0 ~2 Z, W# a
dermal conversion of testosterone to dihydrotestos-$ @/ d5 I3 Y. N: E
terone, which is a more potent metabolite, is more, F! u; h5 i2 X) W; A
active in young children exposed to testosterone) o U% S" ^) r3 Z: e
exogenously7; however, we did not measure a dihy-
; i' A2 H, N0 R- ~: B" `; K C4 K2 p2 Pdrotestosterone level in our patient. In addition to
9 m3 \ `2 g$ K1 t5 I) b2 cvirilization, exposure to exogenous testosterone in c; e* ?) L* M% J
children results in an increase in growth velocity and7 m$ e; n2 s/ }: |0 |6 c
advanced bone age, as seen in our patient.0 k/ }, q6 A" z5 A' _# e9 a v
The long-term effect of androgen exposure during
, x& ?7 J. b( u; X. e$ {! e' dearly childhood on pubertal development and final
( P8 d( {" L! Y* [0 t; t+ kadult height are not fully known and always remain
4 L- ]3 h, }1 H2 m* za concern. Children treated with short-term testos-
+ {1 E3 M" X4 G1 U9 y/ p; ^terone injection or topical androgen may exhibit some
4 j- ]) c! }% q! Q) i2 A6 {! B# Hacceleration of the skeletal maturation; however, after7 E7 ~! E" L" s
cessation of treatment, the rate of bone maturation! d; N6 q8 h* E
decelerates and gradually returns to normal.8,9' K* B2 ^ w6 l, [2 o- M9 ~6 S
There are conflicting reports and controversy! x" b! X8 m$ r' _4 ^+ E; ?5 x
over the effect of early androgen exposure on adult8 G" [' d( K0 A" u
penile length.10,11 Some reports suggest subnormal# t! @, D& O4 m) D) X7 p
adult penile length, apparently because of downreg-
& Q2 X& x1 [; Aulation of androgen receptor number.10,12 However,
: o K: e2 k; [8 i4 USutherland et al13 did not find a correlation between
1 P! C2 H/ w" o) x0 d. ^, ^childhood testosterone exposure and reduced adult
: N$ \" v( p8 {$ _penile length in clinical studies.
4 d, S, F' K( Q3 X4 U3 |Nonetheless, we do not believe our patient is/ E& m) ?# ]+ ^9 O# \$ [
going to experience any of the untoward effects from9 j( |0 _/ k9 m# S7 S: D
testosterone exposure as mentioned earlier because4 A: w4 ~+ j- Z
the exposure was not for a prolonged period of time.6 q2 `, v3 C0 x- R: X8 _7 g' y1 n0 ~
Although the bone age was advanced at the time of3 |+ @8 L5 H& K
diagnosis, the child had a normal growth velocity at7 I1 o& W R `$ Q% _, f `
the follow-up visit. It is hoped that his final adult; @) g% K" O* W+ `% v1 _
height will not be affected.0 E6 N9 C0 k4 b
Although rarely reported, the widespread avail-1 i# ] s- w" w8 f5 N
ability of androgen products in our society may
4 Q: _% \& k7 gindeed cause more virilization in male or female) ?, ^1 b2 v: ?) |4 I, Q* M: h
children than one would realize. Exposure to andro-
( k- z% V; W. Ugen products must be considered and specific ques-; {' c) ?1 P8 n z
tioning about the use of a testosterone product or
5 F% D* C& \/ U3 _! O# ~! }gel should be asked of the family members during. w5 F+ T% z. r9 N
the evaluation of any children who present with vir-
% _& F2 D: o/ N9 d8 ?- g, ]1 W Yilization or peripheral precocious puberty. The diag-
$ |8 B/ x5 [3 c2 y' U) G# r$ h; ynosis can be established by just a few tests and by
; g9 K3 H! {2 ^; n/ Y; y/ Iappropriate history. The inability to obtain such a
! f, ^% |% G: L5 O3 O* u5 ehistory, or failure to ask the specific questions, may
' E/ n9 Y ]" v/ Vresult in extensive, unnecessary, and expensive6 v" ]: y* m. t# O; E- b" Q2 \
investigation. The primary care physician should be
$ r/ I6 ~8 v' E7 d, h, Y zaware of this fact, because most of these children
7 x' h E# N( T- S" y! Umay initially present in their practice. The Physicians’
. N9 t1 B7 D% ?6 k4 t( }& mDesk Reference and package insert should also put a
7 W6 r" e4 k2 t, H2 W$ V v7 bwarning about the virilizing effect on a male or
4 C7 B1 d5 E) w* zfemale child who might come in contact with some-$ B3 E5 v/ V4 a3 ]
one using any of these products.4 e$ Z4 L. i, M; T8 R6 t
References! ^, ]) z' }+ i1 U o* q9 v! i# X/ ?1 g
1. Styne DM. The testes: disorder of sexual differentiation$ M0 X. h+ i+ m
and puberty in the male. In: Sperling MA, ed. Pediatric" B& F Q9 S" U0 Q: y& s i1 g/ n
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
3 _! a2 _) T- f% b$ G2002: 565-628./ p) a9 ?; d. H% h: E4 L" O q
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
: Z- ?8 q, T, I3 R' o0 Wpuberty in children with tumours of the suprasellar pineal
( u$ B9 C' B, x6 A3 Z& S7 c5 pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ C5 T, D/ g, s) k' i% YTopical Testosterone Exposure / Bhowmick et al 543
! h8 i" u2 ~2 L2 g2 d8 d6 bareas: organic central precocious puberty. Acta Paediatr.
( s. m4 m9 G- _+ y$ L* Z+ N J2001;90:751-756.
: ^$ y4 S; b7 q E3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.# _7 L/ G5 ^- @ T0 n1 ~1 j# y
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
2 |* Y8 T; U# k8 ?5 }; k9 A( \Dekker Inc; 2003:211-238.
" x! t0 b& s, q" N4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
* b0 z$ t) G2 P8 B" c. \development in a two-year-old boy induced by topical8 S" }5 u+ z, R$ l0 ?( U$ Q
exposure to testosterone. Pediatrics. 1999;104:e23.) s+ k% a4 T& P/ K, ~
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
% I1 r; g* g6 dSkeletal Development of the Hand and Wrist. 2nd ed.
+ {6 a" K, h5 A! |. DStanford, CA: Stanford University Press; 1959.5 M5 k! {+ o1 I$ r" B; `& h6 A
6. Physicians’ Desk Reference. Androgel 1% testosterone,
: m- M& ^, t/ p/ y. zUnimed Pharmaceutical Inc. Montvale, NJ: Medical* u+ A4 \, L9 l
Economics Company, Inc; 2004:3239-3241.
9 ~: G! r7 L D/ z5 U9 X( K7 Q. P& Z7. Klugo RC, Cerny JC. Response of micropenis to topical7 w/ S1 M: O. f3 q& ?, J
testosterone and gonadotropin. J Urol. 1978;119:
' V4 a8 g6 \& _! u667-668.
y6 g) i: Y K, F5 O* X# k1 G8. Guthrie RD, Smith DW, Graham CB. Testosterone6 v8 {7 E/ P' Y& e/ {8 v E
treatment for micropenis during early childhood. J Pediatr.( ~ y( p0 E2 Z8 o2 ^1 B. J6 j
1973;83:247-252.
+ R+ S* ?9 s8 {( a" v9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
3 W8 a- o1 e; ]5 c) ?* etherapy for penile growth. Urol. 1975;6:708-710.
1 k4 \1 G% Z$ F# V10. Husmann DA, Cain MP. Microphallus: eventual phallic
7 [, b% |- @+ A( O+ y5 N( H3 _# Ssize is dependent on the timing of androgen administra-
. P! L2 Q6 t% I8 ation. J Urol. 1994;152:734-739.
+ |0 g8 E+ n6 T, x; k11. McMahon DR, Kramer SA, Husmann DA. Micropenis:# i" \" w' f0 [
does early treatment with testosterone do more harm
8 z* x/ g9 a. @& s/ _than good? J Urol. 1995;154:825-829.& m, o+ Z$ X' G# b0 l
12. Takane KK, George FW, Wilson JD. Androgen receptor
( y% a; D/ w; L8 E: [' x; x. iof rat penis is down-regulated by androgen. Am J Physiol.
1 W. }3 @- ]4 E1990;258:E46-E50.
( \2 Q1 @/ B8 N# J13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
. ]4 C1 n$ y, x- i0 Cof prepubertal androgen exposure on adult penile
& [. `7 Y' E9 b# _2 [3 @; n6 Plength. J Urol. 1996;156:783-787. |
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