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is a significant concern for physicians. Central9 y5 }! D$ ]) l( R! ~# ]3 e
precocious puberty (CPP), which is mediated# ]6 U1 x2 d& q5 S6 m
through the hypothalamic pituitary gonadal axis, has1 f; G0 z7 w; }5 r
a higher incidence of organic central nervous system2 s8 a. {/ x0 q* c0 N3 {, w9 l. e
lesions in boys.1,2 Virilization in boys, as manifested/ @0 K- D' I4 {/ Y' c& p" i2 u
by enlargement of the penis, development of pubic
8 |# _9 Q/ W# f$ A$ u, J! Q& thair, and facial acne without enlargement of testi-
6 o9 d1 A, b5 ^! M! G3 zcles, suggests peripheral or pseudopuberty.1-3 We
, n+ \% x7 Y$ Ereport a 16-month-old boy who presented with the
% F/ s5 e+ ^$ h2 Lenlargement of the phallus and pubic hair develop-
$ E. M5 {6 b, p6 hment without testicular enlargement, which was due
4 O3 l K& a) _* ^, M8 Tto the unintentional exposure to androgen gel used by
# `: e. f2 d7 ~! w5 R: Othe father. The family initially concealed this infor-# C* e* C# D/ U( g# y. O
mation, resulting in an extensive work-up for this
5 d- h* l% w1 K7 m3 p3 H$ s, I7 i+ Hchild. Given the widespread and easy availability of
|0 N' I$ h; M' ]" Ytestosterone gel and cream, we believe this is proba-
' Z) h$ V# D$ l1 X6 q# d0 a; \bly more common than the rare case report in the" ?) X" Y* N7 N- \# b2 {
literature.4
+ v. L1 O$ a. qPatient Report9 }5 ?7 y% b, H4 _7 P1 f. [
A 16-month-old white child was referred to the( h/ y% q# t4 W A# f. }
endocrine clinic by his pediatrician with the concern0 E4 Y8 \; q n: G1 A( h
of early sexual development. His mother noticed
, A$ ? X. T' E6 {% @, Mlight colored pubic hair development when he was$ w9 m I) t" | B
From the 1Division of Pediatric Endocrinology, 2University of( B6 z9 r6 n/ O- O) @1 c
South Alabama Medical Center, Mobile, Alabama.
3 ]3 ^ G9 ^! Y4 hAddress correspondence to: Samar K. Bhowmick, MD, FACE,. Z% X7 Z2 ?# ]; f2 h5 P
Professor of Pediatrics, University of South Alabama, College of+ j& [4 p& V0 L1 g( B- m
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;. N( x% R# O7 {2 G/ g) t
e-mail: [email protected].* V; X9 c! }$ b/ j
about 6 to 7 months old, which progressively became" Z4 \& f0 f! c: l
darker. She was also concerned about the enlarge-/ R" f+ e$ m; G- E+ |" b+ K7 ^5 K
ment of his penis and frequent erections. The child+ S3 Q1 Y1 R8 J3 G
was the product of a full-term normal delivery, with
, @3 M2 b) \& ^. u3 c/ Wa birth weight of 7 lb 14 oz, and birth length of
+ o% D8 f* k9 u6 i: e20 inches. He was breast-fed throughout the first year
T7 G( n8 u b, e' P1 \$ @; Iof life and was still receiving breast milk along with
+ O& a9 R! g5 l: w( E& {( [solid food. He had no hospitalizations or surgery,
' |* ?) s$ x$ F: L- T% aand his psychosocial and psychomotor development
8 z. ^( R. Y! t( x! ~was age appropriate. z x2 }: e. p& w
The family history was remarkable for the father,
0 P7 d* d0 O( C$ `: jwho was diagnosed with hypothyroidism at age 16, X2 s4 I2 f* X9 Q' R
which was treated with thyroxine. The father’s5 B1 v9 j$ j8 z
height was 6 feet, and he went through a somewhat
5 g+ L: I- O# h5 Jearly puberty and had stopped growing by age 14.& d4 ~+ B9 Z0 G$ J4 j0 T* W
The father denied taking any other medication. The
$ W/ e G# X3 \1 h+ ]8 L1 echild’s mother was in good health. Her menarche
* {) H4 W e' jwas at 11 years of age, and her height was at 5 feet5 ?# b) q. e9 V
5 inches. There was no other family history of pre-
! a6 \ B! ?9 \. Wcocious sexual development in the first-degree rela-
7 |" i C" |) N% g& e! btives. There were no siblings.
( c2 F1 D5 t; s" o' Q% ]/ {Physical Examination: G Y K# }2 o9 v! g4 l
The physical examination revealed a very active,
4 m% T# ]' ~2 A- h' kplayful, and healthy boy. The vital signs documented
! G" P% [7 T- X; k. G, Ta blood pressure of 85/50 mm Hg, his length was* P9 x2 H7 Q$ r; E- t" n3 V7 Z
90 cm (>97th percentile), and his weight was 14.4 kg: K4 Y6 L5 Y0 F( ]& t
(also >97th percentile). The observed yearly growth/ ^' `# `4 Q, f0 Y
velocity was 30 cm (12 inches). The examination of
; L4 @5 C2 t) I, fthe neck revealed no thyroid enlargement.
4 ^( ^ O" h5 q! l7 F+ GThe genitourinary examination was remarkable for
* U1 H. y0 ^6 Lenlargement of the penis, with a stretched length of) x8 M$ f* K& i) V4 \; p
8 cm and a width of 2 cm. The glans penis was very well$ ` e/ K, J' ^* ]3 M$ N
developed. The pubic hair was Tanner II, mostly around
1 Z) Q4 t6 e$ F3 \4 W+ p0 z4 a5401 x# O, L! O2 P! [, z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 T* ^, T8 R8 e( I! w* qthe base of the phallus and was dark and curled. The) a+ q$ U! c7 a, Z2 y
testicular volume was prepubertal at 2 mL each.% O) A4 l B z
The skin was moist and smooth and somewhat$ M1 R$ ?8 N2 Q
oily. No axillary hair was noted. There were no# A$ t4 k! f" Y6 K- P: L
abnormal skin pigmentations or café-au-lait spots.+ Q2 o' F$ F) t. l3 l3 V
Neurologic evaluation showed deep tendon reflex 2+6 w7 M5 g5 C; s
bilateral and symmetrical. There was no suggestion5 Y' W: r5 N& ]% f* d
of papilledema.$ j7 J9 `' K! [ `0 [
Laboratory Evaluation
1 C/ y: x- N7 i- z2 E. Z8 d6 VThe bone age was consistent with 28 months by
' h7 b- y2 L3 i( F/ Susing the standard of Greulich and Pyle at a chrono-5 _' B! _. n3 c) U" q
logic age of 16 months (advanced).5 Chromosomal: \; E/ m% t9 q; X& M9 C3 A
karyotype was 46XY. The thyroid function test
+ L3 a$ {7 c6 ~. [8 ?, _+ Ushowed a free T4 of 1.69 ng/dL, and thyroid stimu-8 v$ `2 J; x! P7 w+ [6 U
lating hormone level was 1.3 µIU/mL (both normal).' E4 Z3 {6 C' c
The concentrations of serum electrolytes, blood+ `% Z6 Y7 ~& ~# T
urea nitrogen, creatinine, and calcium all were
# O2 w2 W* _' q. ]8 M4 v- Swithin normal range for his age. The concentration
/ o" a' J7 m# L5 N8 Wof serum 17-hydroxyprogesterone was 16 ng/dL
+ ?; j! n3 S0 m: }; ^+ O' G: n(normal, 3 to 90 ng/dL), androstenedione was 20
* P% Y2 w" L; Z0 E0 \" Yng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-* y1 a6 P* e* j7 N
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
6 l! p2 c+ H- ~: Q) M4 {desoxycorticosterone was 4.3 ng/dL (normal, 7 to
' w+ W: l; I+ c4 ]! S49ng/dL), 11-desoxycortisol (specific compound S)+ s; w0 g3 ~+ p9 l# f- X
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-5 j. ~- |9 c) G* `2 h
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
( F7 \/ Q" ^: p$ |" I2 Q1 ?testosterone was 60 ng/dL (normal <3 to 10 ng/dL),* K+ H/ q, p5 Q+ h( @" X* E$ c
and β-human chorionic gonadotropin was less than1 b _, A( \$ Q
5 mIU/mL (normal <5 mIU/mL). Serum follicular7 N( b$ W4 _) o9 A/ O
stimulating hormone and leuteinizing hormone
4 ?. y& \+ U/ I: b3 q* J' _2 c+ Pconcentrations were less than 0.05 mIU/mL
& g6 l9 G7 E* P3 x(prepubertal).
+ |$ y1 k9 e E( `5 R c% gThe parents were notified about the laboratory
6 V4 }; ]. S. t4 dresults and were informed that all of the tests were4 y% T/ x( J1 o: O' N u# ^
normal except the testosterone level was high. The
" e$ x: @# j: u3 }follow-up visit was arranged within a few weeks to
0 @& W7 `0 u8 ~0 s4 C9 P6 Lobtain testicular and abdominal sonograms; how-* [7 I4 S' P4 I) S w/ j
ever, the family did not return for 4 months.
4 |2 ?. q1 P4 f# s3 XPhysical examination at this time revealed that the3 l; g: G' G5 H- j. Y1 |
child had grown 2.5 cm in 4 months and had gained2 u ^, B6 O, a s, O
2 kg of weight. Physical examination remained
4 G- a3 r- {8 h. q' Uunchanged. Surprisingly, the pubic hair almost com-
: J8 b* `. ^$ x9 O& L, N( zpletely disappeared except for a few vellous hairs at" r7 }. A6 a6 m/ v5 o, K/ }
the base of the phallus. Testicular volume was still 2
! q2 @: d: B" T ^& \9 t5 RmL, and the size of the penis remained unchanged.4 x" u+ _( m8 U. k9 r7 l
The mother also said that the boy was no longer hav-) |) z9 ?5 Q0 S* e( ?
ing frequent erections.6 C0 ]# F* N# y# m) O
Both parents were again questioned about use of
/ C: E9 \8 o0 Qany ointment/creams that they may have applied to
9 b; _% H# R c' J- z' jthe child’s skin. This time the father admitted the
' Q0 _% Z; o9 M; e! t; ITopical Testosterone Exposure / Bhowmick et al 541+ {+ N! _- Z/ V' h
use of testosterone gel twice daily that he was apply-
- d" Y/ P @1 _& D6 H" j7 Ring over his own shoulders, chest, and back area for
3 B% N% o* h# l8 u: j1 ya year. The father also revealed he was embarrassed
5 l6 X7 d" ?6 {" Mto disclose that he was using a testosterone gel pre-; Y( {: W6 \( {1 b+ Y0 H9 q+ v
scribed by his family physician for decreased libido+ j2 d% e/ s4 P' x, n7 Z s
secondary to depression.# F) ?& j& `: `2 v( t
The child slept in the same bed with parents.
# z- K0 F4 {& f2 k9 Q2 `The father would hug the baby and hold him on his; p( |- @* ]* W2 l1 x3 V6 g/ R; {
chest for a considerable period of time, causing sig-
. }* N7 p5 j( P) M* O+ p! q, I# unificant bare skin contact between baby and father.
* u( f- |8 i6 m+ s1 u4 j H ZThe father also admitted that after the phone call,
) X3 x E1 p+ {: P- t! H ywhen he learned the testosterone level in the baby
- e! M! N ^' ~8 Q1 j5 h( Mwas high, he then read the product information
6 l1 u& ^6 \4 v6 [# u0 s$ X# Xpacket and concluded that it was most likely the rea-! |- m9 t+ D0 o
son for the child’s virilization. At that time, they
& c" T5 ~* [2 cdecided to put the baby in a separate bed, and the9 ?# i5 N" y" D% p2 j
father was not hugging him with bare skin and had
9 G& y8 k( `1 a( `4 `3 ebeen using protective clothing. A repeat testosterone
4 D4 v6 b; q9 x. |$ ^# Itest was ordered, but the family did not go to the9 P6 V, b. A, _; T6 n
laboratory to obtain the test.
. ?. E4 ~: b/ w" c1 ~1 j. n7 y: {Discussion) O, r* p2 v+ I$ q* o) E2 F$ u# O
Precocious puberty in boys is defined as secondary
0 q0 `7 e9 K" ~0 B. nsexual development before 9 years of age.1,4
% w6 O# E/ C r. b: BPrecocious puberty is termed as central (true) when2 E5 E" _) y, @8 k
it is caused by the premature activation of hypo-) p( R% V2 l6 i" y7 e, l( z' [
thalamic pituitary gonadal axis. CPP is more com-
/ o4 J: c0 o2 J2 H1 kmon in girls than in boys.1,3 Most boys with CPP
) d6 V5 @( r9 D, bmay have a central nervous system lesion that is
/ k. p) U* a! h* n. i, Yresponsible for the early activation of the hypothal-
3 }0 k& N8 C- s; J5 Jamic pituitary gonadal axis.1-3 Thus, greater empha-6 a1 z6 @5 R* g4 U0 z A% _! N" q
sis has been given to neuroradiologic imaging in) W9 D- u0 k( ~! G
boys with precocious puberty. In addition to viril-
# i! n/ q, b k& }$ |% I7 Fization, the clinical hallmark of CPP is the symmet-
$ I3 e/ X1 H9 K0 trical testicular growth secondary to stimulation by
7 F) N, ^: n8 [1 h" P) Ggonadotropins.1,3% E I8 j) j* A5 ~& I
Gonadotropin-independent peripheral preco- ~; F$ r/ T1 b4 N7 v3 r5 a
cious puberty in boys also results from inappropriate
' o( j& e( C- }4 u* yandrogenic stimulation from either endogenous or8 N' S- S9 F: U) ]
exogenous sources, nonpituitary gonadotropin stim-7 m0 o1 ^+ o5 N
ulation, and rare activating mutations.3 Virilizing
) k( p+ B+ u4 Y# Hcongenital adrenal hyperplasia producing excessive/ H1 g, G( `7 l5 {4 p" s1 u
adrenal androgens is a common cause of precocious' K- A$ W# `" q; F! K& f. Z
puberty in boys.3,4$ k5 Y0 |( N2 A: Y7 T8 w: ^* Z
The most common form of congenital adrenal) [9 E, X8 m% ]: @% `% l: R9 K
hyperplasia is the 21-hydroxylase enzyme deficiency.
4 ?! ?: i7 K+ k9 F6 l: I$ B7 J2 GThe 11-β hydroxylase deficiency may also result in a) F; {5 S1 [' J
excessive adrenal androgen production, and rarely,
. _) @" P0 H& ?$ van adrenal tumor may also cause adrenal androgen
) k( h! r9 }$ ^- N. b% |excess.1,39 |% p0 I) n$ h+ ^" ~
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! l; k( x% a; y; t! Y# ?
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007; f! u4 d1 C# J8 ^, Q2 `8 {4 b
A unique entity of male-limited gonadotropin-
* s) ?6 h/ ~+ ]independent precocious puberty, which is also known
1 T& h9 W0 S |6 l# Xas testotoxicosis, may cause precocious puberty at a
1 H/ h. q1 ^2 W, u4 d( Lvery young age. The physical findings in these boys% i8 l8 x# \; {6 N/ {
with this disorder are full pubertal development,' L" l$ g t" T6 ^6 D
including bilateral testicular growth, similar to boys4 X* Z; B0 f+ [
with CPP. The gonadotropin levels in this disorder! f' G7 H) R$ p% {) m( m- G0 t
are suppressed to prepubertal levels and do not show
# `0 V8 i* w9 z, a! ^pubertal response of gonadotropin after gonadotropin-
( F4 e% |2 L4 L( R" c6 _4 ]releasing hormone stimulation. This is a sex-linked
1 [0 ^" I/ Y+ y/ r7 y$ z, iautosomal dominant disorder that affects only* ~- ]( S+ k' k N
males; therefore, other male members of the family
& P% \) E1 F! S+ N G+ D# f3 [/ }) ]may have similar precocious puberty.3 ~$ r. D5 c* J) `$ H) U1 C. u
In our patient, physical examination was incon-+ L2 X1 s4 n) c% w/ }; c5 C3 `' S
sistent with true precocious puberty since his testi-
& p' L- B1 Y5 {% Y, S/ y! mcles were prepubertal in size. However, testotoxicosis/ z g! N$ U7 l- V0 D
was in the differential diagnosis because his father* X- @3 p+ W0 u
started puberty somewhat early, and occasionally,
( X) M* y3 z- d' ^; l1 p1 o$ ]7 G Utesticular enlargement is not that evident in the; H7 v$ M4 E- [( F" U) c* v
beginning of this process.1 In the absence of a neg-
3 q/ S [& i1 jative initial history of androgen exposure, our2 z* b0 K1 J. `) l, S
biggest concern was virilizing adrenal hyperplasia,& V6 s: `& s- Z+ e6 W7 q6 h
either 21-hydroxylase deficiency or 11-β hydroxylase
5 g3 Z& K( U" g6 `0 \/ ddeficiency. Those diagnoses were excluded by find-
' U% W" k. e! [2 ~! F, `ing the normal level of adrenal steroids.1 H1 |- b+ h/ l( }
The diagnosis of exogenous androgens was strongly3 u3 ]. q% L c% ?/ }6 C' r
suspected in a follow-up visit after 4 months because0 L, t" e6 Y4 T. L/ q
the physical examination revealed the complete disap-' {. S" I; A @( p
pearance of pubic hair, normal growth velocity, and
! d2 b0 ^# E* W0 r: Rdecreased erections. The father admitted using a testos-# E1 [/ d/ v$ ]4 ]6 M% W) b4 K
terone gel, which he concealed at first visit. He was5 x. c$ h5 T4 s+ `. J7 U
using it rather frequently, twice a day. The Physicians’
+ S( R* D2 _/ I0 kDesk Reference, or package insert of this product, gel or9 k' a/ @1 i8 F# E* z( ]) c
cream, cautions about dermal testosterone transfer to+ Q# I }! K% {0 r
unprotected females through direct skin exposure.
* ]+ T1 n2 _7 `$ G( V7 sSerum testosterone level was found to be 2 times the4 j( D" E% ]* N/ `/ [
baseline value in those females who were exposed to
+ w/ D k5 y _4 x; B, Heven 15 minutes of direct skin contact with their male
% L0 i( A$ K3 i$ D8 Q3 q( P% Y4 npartners.6 However, when a shirt covered the applica-
! g( W- h6 U( [' Jtion site, this testosterone transfer was prevented.
* ]& v# W- D2 Q% jOur patient’s testosterone level was 60 ng/mL,
s5 V" X9 ]6 U8 M& bwhich was clearly high. Some studies suggest that
2 |# F2 x7 @+ l% N& r! y) _dermal conversion of testosterone to dihydrotestos-
% b! g0 U5 X/ v/ ]terone, which is a more potent metabolite, is more
" x( T M: j/ R- {: u$ yactive in young children exposed to testosterone
, I* p5 y; R$ m# `( cexogenously7; however, we did not measure a dihy-" t. G( y- L; ], w+ ~
drotestosterone level in our patient. In addition to
+ D% A+ H+ s% _$ S' bvirilization, exposure to exogenous testosterone in
) U) ]) Q1 A7 ichildren results in an increase in growth velocity and+ g9 g! {6 g) Y
advanced bone age, as seen in our patient.5 p6 B- c1 {- D) D/ b/ S/ |2 o
The long-term effect of androgen exposure during5 g; L. D& o. B* E3 d# v3 C; @3 ^$ P
early childhood on pubertal development and final4 p0 u' D! X7 O& Y3 \, C
adult height are not fully known and always remain; B% i: M, U8 G
a concern. Children treated with short-term testos-* L* s# Y/ d F8 I* z* O
terone injection or topical androgen may exhibit some
# P$ ?$ K8 D) u0 Y) m" \. Cacceleration of the skeletal maturation; however, after
9 `/ V' }% [6 [7 c; u+ x7 Kcessation of treatment, the rate of bone maturation
% T0 d( Q# X4 A2 idecelerates and gradually returns to normal.8,9
1 A0 _; ]5 I# Z" i7 uThere are conflicting reports and controversy
" S/ ~# Q$ C. e' ?" }. Bover the effect of early androgen exposure on adult
$ v+ O& `3 u$ w4 z+ {penile length.10,11 Some reports suggest subnormal8 |- v/ V. f) O$ V1 Z! D
adult penile length, apparently because of downreg-
3 H& U; a- e3 m: Gulation of androgen receptor number.10,12 However,# m: ~- T8 _2 N" ?$ @+ X% e
Sutherland et al13 did not find a correlation between
+ ^" Z3 T" }4 d4 Dchildhood testosterone exposure and reduced adult5 U p5 w" I' q$ t$ ^* y
penile length in clinical studies.; v) C$ J" y1 {% m* |! l$ p9 w
Nonetheless, we do not believe our patient is
5 S. A5 }, E/ t J" \ N: Ngoing to experience any of the untoward effects from* x# x# b8 O1 B
testosterone exposure as mentioned earlier because
/ d2 j' q: ]" |( }2 c( [- wthe exposure was not for a prolonged period of time.7 G, d, A4 X4 u, O0 v; |8 }
Although the bone age was advanced at the time of
. p, |+ L \0 _0 h2 X& N( Vdiagnosis, the child had a normal growth velocity at3 h( k' p( Y0 k6 Z' p- |' ~
the follow-up visit. It is hoped that his final adult
- g2 a: e8 T* i/ b! }' Aheight will not be affected.
- X4 S% S5 F5 h9 pAlthough rarely reported, the widespread avail-" M Y C+ P+ F2 N, e
ability of androgen products in our society may( k' l( C$ Q) R4 @! o& v
indeed cause more virilization in male or female
! J' ~( s/ o! Y' L/ ychildren than one would realize. Exposure to andro-: [! }9 X; F8 ]8 `! y
gen products must be considered and specific ques-5 p2 I: i A3 w# r0 C
tioning about the use of a testosterone product or
' x+ ~# [% l7 rgel should be asked of the family members during
! Q: w8 z+ C5 b+ F5 [, C3 D k; a6 Nthe evaluation of any children who present with vir-$ R0 c0 E& J* }& }9 m9 X0 W
ilization or peripheral precocious puberty. The diag-+ X# F0 m" G) K# t5 b
nosis can be established by just a few tests and by( A9 i# }% z, r. X5 M# N
appropriate history. The inability to obtain such a1 p1 q2 j$ R0 {8 p- M
history, or failure to ask the specific questions, may0 |" V. S* W- K4 l* l
result in extensive, unnecessary, and expensive9 y: }# b* V" r2 E+ r7 U
investigation. The primary care physician should be/ v5 z. Y) Q# r6 T) Z C
aware of this fact, because most of these children" r6 U: u! G. t+ @# V. x
may initially present in their practice. The Physicians’2 F' z/ C% Z% i/ u2 j
Desk Reference and package insert should also put a) |4 M: u& ~& p% r. }
warning about the virilizing effect on a male or T: w) G# H" M- y$ f4 c
female child who might come in contact with some-0 t+ n2 u" u! F8 e
one using any of these products.$ C+ [7 E( w8 t! n* Y2 w& m/ R
References* e8 K" c8 x+ N2 c8 A& Q
1. Styne DM. The testes: disorder of sexual differentiation' j p2 T$ w! f; s7 W9 U% `
and puberty in the male. In: Sperling MA, ed. Pediatric
, I( n2 N9 u+ b: L( T; O/ F2 iEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
7 _" p; U% X9 ?% h2002: 565-628.; e* U' E* L& V( E* I8 l& r) C
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
& i+ {: @; s; u. p+ n! ppuberty in children with tumours of the suprasellar pineal
1 U1 N: p! ?+ H0 q( h' Q+ uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" [* e) |6 N; F1 [Topical Testosterone Exposure / Bhowmick et al 5436 C9 I) t/ w0 O2 ^* t8 ~, `
areas: organic central precocious puberty. Acta Paediatr., H% y! \' M% P3 i9 z% Z- ?' M' B
2001;90:751-756.
( S& |7 M0 w8 d2 `% V: m& x3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
) K' O/ y" K" y7 yPediatric Endocrinology. 4th ed. New York, NY: Marcel
- v8 \3 E& R# g$ ?6 C) HDekker Inc; 2003:211-238.4 v* {4 K5 C! k h" l3 N; t3 ]
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual3 @$ L6 [& ?9 R" k* t H
development in a two-year-old boy induced by topical
3 ^. j5 a9 h" ?; K3 u* L) @exposure to testosterone. Pediatrics. 1999;104:e23.; T3 N! d# ?4 G3 _8 _5 F$ ]2 k: J4 G
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
8 x5 Y. P* |- vSkeletal Development of the Hand and Wrist. 2nd ed.9 L% W3 ]8 Z- v r0 r& H% k
Stanford, CA: Stanford University Press; 1959.6 u7 v4 }& a7 b9 m3 _, n) ~( `
6. Physicians’ Desk Reference. Androgel 1% testosterone,) L3 i( Y9 G0 V3 W
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
6 k0 n! z3 l3 A, t, r! nEconomics Company, Inc; 2004:3239-3241.
! J6 T' Q! ~# X8 _# s7 E8 a7. Klugo RC, Cerny JC. Response of micropenis to topical% {3 s8 g0 e; e( j" n5 A% Q
testosterone and gonadotropin. J Urol. 1978;119:
n: b5 g- v( J+ ]0 e8 \667-668.
6 ?$ i) f: E9 b3 a/ q6 C& b8. Guthrie RD, Smith DW, Graham CB. Testosterone6 {( Y. c7 X# s# q/ ]
treatment for micropenis during early childhood. J Pediatr.) w' P6 |2 q. W9 U2 R% D3 Y3 n- |
1973;83:247-252.9 Q( F9 @9 J% T, A& d1 m6 O. ^* f/ d
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
4 @3 r: e0 q' W3 Z8 Ztherapy for penile growth. Urol. 1975;6:708-710.' U2 O5 l) z2 S* A! o/ D
10. Husmann DA, Cain MP. Microphallus: eventual phallic- h, ?8 o% U1 u9 H
size is dependent on the timing of androgen administra-
8 S$ g# C8 w0 I$ q' d' H) E0 Ztion. J Urol. 1994;152:734-739.
# y( i8 @, C/ |3 A9 H$ M3 j5 d11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
' r+ X4 ?7 I: f8 Ldoes early treatment with testosterone do more harm9 @/ X$ r' X. r$ b- C v
than good? J Urol. 1995;154:825-829.
; N3 P( ^! m, A5 a12. Takane KK, George FW, Wilson JD. Androgen receptor
3 O( @* [0 @8 b" X# I; Nof rat penis is down-regulated by androgen. Am J Physiol.. p1 E$ l& Q J1 [
1990;258:E46-E50.
1 P4 [1 Y" S! Q( D. K5 ]13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect- u! c& ?7 |1 Y
of prepubertal androgen exposure on adult penile
; k: ?( F r# `, T% r; Glength. J Urol. 1996;156:783-787. |
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