- 註冊時間
- 2023-5-6
- 精華
- 在線時間
- 小時
- 米币
-
- 最後登錄
- 1970-1-1
|
發表於 2025-1-4 03:38:58
|
顯示全部樓層
is a significant concern for physicians. Central! v& W1 b6 V' `8 q% j6 c
precocious puberty (CPP), which is mediated. D4 r" a# V1 S) ?, K: c5 n! f
through the hypothalamic pituitary gonadal axis, has
% R- u' U9 g; o7 O: g9 Ja higher incidence of organic central nervous system
- Q" X/ m. |6 Jlesions in boys.1,2 Virilization in boys, as manifested# C$ |% u$ v% R
by enlargement of the penis, development of pubic$ E9 g- s; l5 z" m& A5 l
hair, and facial acne without enlargement of testi-. o) t7 F0 u& j& _9 c) X6 R
cles, suggests peripheral or pseudopuberty.1-3 We( W1 G5 C% I) g
report a 16-month-old boy who presented with the
) l, k# @; }/ V( M+ M$ {2 c6 _ u6 [enlargement of the phallus and pubic hair develop-
# \, B% M1 ~- C% i4 L8 Pment without testicular enlargement, which was due
1 q1 u# M0 y/ k6 ~1 u3 gto the unintentional exposure to androgen gel used by
& u5 R' o% r1 K- E. B$ Ithe father. The family initially concealed this infor-# D8 x. `/ }: {; M, @* t
mation, resulting in an extensive work-up for this8 g3 s- d+ Y3 B
child. Given the widespread and easy availability of6 \ K" [* a( P% W) D9 n4 [! K0 t
testosterone gel and cream, we believe this is proba-
' L5 H: T3 j! `& Rbly more common than the rare case report in the3 H- x0 y) Y! J* m2 E* x
literature.46 F" z6 v5 D# i
Patient Report3 R) I3 s- ^1 u9 v
A 16-month-old white child was referred to the
) t) Y) K) b2 Z1 eendocrine clinic by his pediatrician with the concern
+ S) H! I; Z/ e* v0 u f+ Hof early sexual development. His mother noticed
2 b2 {( Y: f0 z8 P3 V @light colored pubic hair development when he was9 ?) J/ {& t7 Y1 m" b
From the 1Division of Pediatric Endocrinology, 2University of" K! g, k( r5 j2 @
South Alabama Medical Center, Mobile, Alabama.; Z7 W+ T5 L/ @* J5 r" H, _
Address correspondence to: Samar K. Bhowmick, MD, FACE,8 s4 z* v9 h% s% v1 B
Professor of Pediatrics, University of South Alabama, College of$ c* R" B) t+ m+ n
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;" `. p- ?( A( W4 ^- |8 r( [
e-mail: [email protected]." d$ G+ p( Y! l% v' I E7 O* g
about 6 to 7 months old, which progressively became
& ^2 D0 k: [- X' }darker. She was also concerned about the enlarge-4 g; e* t; M1 e C6 ?; u
ment of his penis and frequent erections. The child) p( ]( }% v* H% c) t( `( B! g
was the product of a full-term normal delivery, with
; S1 N) @; `9 g* A! ~7 Oa birth weight of 7 lb 14 oz, and birth length of) W, i& @' U# N3 r" d: G8 B. o
20 inches. He was breast-fed throughout the first year
6 b$ k4 O5 b/ X1 V5 O; U6 M8 I1 Q- hof life and was still receiving breast milk along with
+ |3 @7 G3 g0 t% Tsolid food. He had no hospitalizations or surgery,
$ c+ h& w2 P: u/ a9 ~and his psychosocial and psychomotor development
( i$ M( H0 P! E& @$ c$ O, a6 Q5 y! Mwas age appropriate.
. R$ U2 i) ]( ^; ^9 i- x: X; m. B* ?" {The family history was remarkable for the father,
+ k6 }3 F" }7 J) uwho was diagnosed with hypothyroidism at age 16,
|% X1 ^% D/ g% twhich was treated with thyroxine. The father’s
) V. X! j; G8 g; Nheight was 6 feet, and he went through a somewhat$ ]8 ^0 D- z2 x5 g7 h$ H D
early puberty and had stopped growing by age 14.# i" a4 ^, P4 d2 e
The father denied taking any other medication. The* z# ?, K! W( [7 V" T
child’s mother was in good health. Her menarche
' F3 ~! a, S _: L; x1 j2 z- G mwas at 11 years of age, and her height was at 5 feet5 ]: E/ m( q: Z
5 inches. There was no other family history of pre-5 d; G( n1 \, n7 A4 M! T/ A" b
cocious sexual development in the first-degree rela-2 j0 _+ u+ p* y# P+ Y: z
tives. There were no siblings.
8 R; K7 J$ I/ g+ `( j1 QPhysical Examination
4 W7 }. c F) k6 m' N0 z5 sThe physical examination revealed a very active,) S7 x0 ^( u- S7 D5 `
playful, and healthy boy. The vital signs documented
0 g4 q- p' Y% za blood pressure of 85/50 mm Hg, his length was
8 ?& h' |6 B! m, G90 cm (>97th percentile), and his weight was 14.4 kg+ E n, n* K$ Q7 Z9 ^- ^8 w
(also >97th percentile). The observed yearly growth
$ w" @4 A3 q3 T+ I' gvelocity was 30 cm (12 inches). The examination of/ |" p7 |, ~( y" T
the neck revealed no thyroid enlargement.
) E R- m0 Y5 z' O5 k7 w& cThe genitourinary examination was remarkable for" u' c; @; U! v7 ]9 N
enlargement of the penis, with a stretched length of% Z7 T3 O9 W+ n' E6 I& U8 @
8 cm and a width of 2 cm. The glans penis was very well
1 A* ]& Q8 L& q4 Cdeveloped. The pubic hair was Tanner II, mostly around: \+ ]* O! d; h5 \
540* {0 m) D! b) v; k' S& M9 Q, r
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. S) G1 k& q3 d
the base of the phallus and was dark and curled. The; v8 h0 d6 u# t- s6 b% f
testicular volume was prepubertal at 2 mL each.1 ~& ?/ `5 C7 l' c) N4 d% h
The skin was moist and smooth and somewhat; D% f c# ?) v+ W/ H5 `
oily. No axillary hair was noted. There were no' d& T, E. s0 r& Z, i3 K% U
abnormal skin pigmentations or café-au-lait spots.
1 g; }6 ~9 ?0 m3 nNeurologic evaluation showed deep tendon reflex 2+
$ M. i+ u# `- V! Nbilateral and symmetrical. There was no suggestion
4 P6 b9 y9 A4 Tof papilledema.
4 D, I$ m7 C+ Q' @$ nLaboratory Evaluation
9 c |* [1 B& q6 yThe bone age was consistent with 28 months by; Z% P9 h! w: Z# c
using the standard of Greulich and Pyle at a chrono-
! Q1 k- h9 |3 g. f! x7 llogic age of 16 months (advanced).5 Chromosomal I0 I1 D0 f7 ^3 {( `6 r8 r
karyotype was 46XY. The thyroid function test* c9 z# c3 E1 W" i$ q9 f A* d
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
: F" }' b/ s' E& _! v) {lating hormone level was 1.3 µIU/mL (both normal)./ F$ `1 \& ]( n7 _
The concentrations of serum electrolytes, blood
* M" t |1 e4 j u8 S, curea nitrogen, creatinine, and calcium all were
4 E* x7 `5 n! y3 Swithin normal range for his age. The concentration5 y& b5 ?; g2 e2 m% B
of serum 17-hydroxyprogesterone was 16 ng/dL P3 z4 j5 o) Q3 J! M2 L) g/ l
(normal, 3 to 90 ng/dL), androstenedione was 20
2 z. I- k) B/ i" L* Y u, Fng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
. O$ w- V, Z* b1 m: L$ E- Wterone was 38 ng/dL (normal, 50 to 760 ng/dL),
& Q" _6 S) ~( U( P8 I9 l; Z: ^desoxycorticosterone was 4.3 ng/dL (normal, 7 to2 s" V& X* z" h/ U- ]
49ng/dL), 11-desoxycortisol (specific compound S)
- [: q% h3 j# g( X. M3 [! F5 Mwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
4 ]9 e( [. Q6 B+ }/ `tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total$ @" E8 E3 t2 x- _
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),8 C N5 C! H U! O+ x
and β-human chorionic gonadotropin was less than: `: Y2 {( @. E- c2 a2 z
5 mIU/mL (normal <5 mIU/mL). Serum follicular
; t& S8 j& w: r5 y2 n' T6 astimulating hormone and leuteinizing hormone' `- a- Z( f& X+ ~. @: k
concentrations were less than 0.05 mIU/mL, T8 P& n$ f$ B
(prepubertal).
# Q8 W: L; @9 W7 IThe parents were notified about the laboratory
/ s G: D4 l( }+ Fresults and were informed that all of the tests were
# R" N+ A; C2 ~( L$ @7 t$ |1 jnormal except the testosterone level was high. The
7 E/ {3 H' g( \: ifollow-up visit was arranged within a few weeks to; e% N. c" F4 n0 h* @7 u( n' q
obtain testicular and abdominal sonograms; how-- I; J) P) ]9 p# s N
ever, the family did not return for 4 months.
5 K! A/ \1 d$ e$ h! xPhysical examination at this time revealed that the# e8 x! K8 t' o9 e
child had grown 2.5 cm in 4 months and had gained: I% `/ }/ K/ D7 u
2 kg of weight. Physical examination remained# T& _6 g5 {, N2 _
unchanged. Surprisingly, the pubic hair almost com-* B5 O |" E- D. T3 |
pletely disappeared except for a few vellous hairs at- F! ?: \1 K+ }8 y3 l7 j
the base of the phallus. Testicular volume was still 2
4 Q+ ?+ Q( o# I& g bmL, and the size of the penis remained unchanged.
* Y$ g' Z/ b1 @The mother also said that the boy was no longer hav-/ w6 B9 q: a7 Q9 k) g" U" c8 L
ing frequent erections.
" S* S8 A$ c. [. XBoth parents were again questioned about use of- {3 @2 L I6 l
any ointment/creams that they may have applied to4 E6 f5 z6 P9 ?" k' Y
the child’s skin. This time the father admitted the4 b* i. g. V+ b3 _" u* ? ~
Topical Testosterone Exposure / Bhowmick et al 5412 g" {7 f2 R4 |) F8 E; e1 u+ V. }4 s
use of testosterone gel twice daily that he was apply-
5 J2 V8 t' t$ K* T. W( fing over his own shoulders, chest, and back area for
, ]7 B- u5 S, {+ Z: p; A: p8 {a year. The father also revealed he was embarrassed5 f4 ] \% O) e9 F
to disclose that he was using a testosterone gel pre-! f8 J3 @" [4 i* h; L
scribed by his family physician for decreased libido
! k9 x3 w4 I5 N* w! z- v4 n9 i+ ^secondary to depression./ G* m* }/ q# i
The child slept in the same bed with parents.5 r8 w) ]7 }( g) x: g5 a9 h/ j
The father would hug the baby and hold him on his
: C. B6 w3 ^2 Uchest for a considerable period of time, causing sig-
) u7 K. m; H5 d2 b$ d) q6 Qnificant bare skin contact between baby and father.
9 |& F$ V0 H6 A5 N) t' ?) qThe father also admitted that after the phone call,
: H8 Z% Q+ X# I& D6 P4 Qwhen he learned the testosterone level in the baby
) |" [- w) P5 R& N* s/ ewas high, he then read the product information
, t! G" e% m2 ~. c" l& cpacket and concluded that it was most likely the rea-
+ w' W1 H4 Q7 D& qson for the child’s virilization. At that time, they
) P" c( } }$ Y- K8 z) l2 Zdecided to put the baby in a separate bed, and the
1 p& t5 V5 z& T% G, F3 Z6 w) lfather was not hugging him with bare skin and had
# @$ _% t% X Cbeen using protective clothing. A repeat testosterone9 c* O4 g7 S- U2 r& K: s# m
test was ordered, but the family did not go to the
& Y% D1 A( y, C5 k9 O! k! M2 Qlaboratory to obtain the test.8 o) m/ \3 w8 \* r) z9 z
Discussion8 B2 }, v# P3 \8 B, b4 f) a% {
Precocious puberty in boys is defined as secondary+ |2 _- {% t; H9 T9 A
sexual development before 9 years of age.1,4- o, q5 Z+ E4 q# `0 W
Precocious puberty is termed as central (true) when
& K; y9 m9 y3 Z1 Bit is caused by the premature activation of hypo-
3 e- S& `# t, l o; S$ ^+ _7 Bthalamic pituitary gonadal axis. CPP is more com-
, `0 _" @, W- wmon in girls than in boys.1,3 Most boys with CPP
9 }/ C- W2 o2 vmay have a central nervous system lesion that is" S' d' t* O6 a$ E) e2 \0 g- g! |+ s3 t
responsible for the early activation of the hypothal-
# ]9 H9 y, b+ f- g" lamic pituitary gonadal axis.1-3 Thus, greater empha-/ _; X$ a7 B4 s1 ?& ^: O! e& g
sis has been given to neuroradiologic imaging in2 p% H u# J/ |4 t: r
boys with precocious puberty. In addition to viril-
, l4 R, U$ A- D8 G( M: u" d* t: Rization, the clinical hallmark of CPP is the symmet-4 c. a: \3 X6 Y+ g- `8 h5 ?
rical testicular growth secondary to stimulation by; T# Y! K1 n ~4 l7 l
gonadotropins.1,3
' i, e+ _* ]8 M @6 zGonadotropin-independent peripheral preco-
8 A( _! u2 G6 C6 O8 K5 [# ycious puberty in boys also results from inappropriate. a9 O# N; c8 m
androgenic stimulation from either endogenous or
7 q& `( \* j: k6 h8 g5 Bexogenous sources, nonpituitary gonadotropin stim-
# M# _0 a- V9 M! v0 |, ?: Z, fulation, and rare activating mutations.3 Virilizing
* }- }- ] {1 N( R5 C/ t, L) Ncongenital adrenal hyperplasia producing excessive
4 a2 k4 ?( [; w& Eadrenal androgens is a common cause of precocious" i& u. e8 y$ Q! k7 g3 a
puberty in boys.3,4
+ o( Y5 m; W# |( d+ [, w& y" w; y. y3 U. AThe most common form of congenital adrenal
+ q: a1 m g0 n1 I" G) Fhyperplasia is the 21-hydroxylase enzyme deficiency.
0 ?# M' W% }* g3 \2 OThe 11-β hydroxylase deficiency may also result in
9 j& l, q/ f& X2 k6 ^excessive adrenal androgen production, and rarely,3 k* h) E5 W$ ?+ l/ U4 C& r. i
an adrenal tumor may also cause adrenal androgen
6 i! {9 G2 U( k, N4 G) U Cexcess.1,3
8 L+ @5 i2 }7 L/ \at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; U- O4 V% f7 y+ g
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
4 A: c" ?. Z3 v, U0 iA unique entity of male-limited gonadotropin-
3 N7 _. x0 @, z: ?: ~7 oindependent precocious puberty, which is also known
0 l7 M* R6 j- z; i) Tas testotoxicosis, may cause precocious puberty at a# \1 h* m6 b( |) M0 t
very young age. The physical findings in these boys
- m: G4 T* E" {9 lwith this disorder are full pubertal development,$ V6 K" g5 c/ E! j% }
including bilateral testicular growth, similar to boys$ J- @- v" l3 j7 g* k
with CPP. The gonadotropin levels in this disorder
8 {6 P( W# z1 j9 Y# n+ e8 l7 z% _are suppressed to prepubertal levels and do not show1 R! ` S3 h Z$ y1 k
pubertal response of gonadotropin after gonadotropin- A: w; R& a4 ]7 O4 p. y0 J4 O
releasing hormone stimulation. This is a sex-linked
% m$ V% z r$ ?( Q: Q# Iautosomal dominant disorder that affects only
% s6 z' y5 Z0 |5 \males; therefore, other male members of the family0 r! u+ t6 \8 ?% w2 a4 `/ Q& L
may have similar precocious puberty.3
0 W$ V/ C# T$ T6 KIn our patient, physical examination was incon-
( m: l K; x, [' ]0 ^sistent with true precocious puberty since his testi-
. _4 r5 r2 e/ F$ b2 u, C0 \8 Zcles were prepubertal in size. However, testotoxicosis9 |, K5 [ \) r) ^" w
was in the differential diagnosis because his father5 Z4 @3 S/ n4 Y( _# ?
started puberty somewhat early, and occasionally,8 o* T& D( ?: \% T0 j) i H
testicular enlargement is not that evident in the
w8 S7 v; Z4 o Z* L Vbeginning of this process.1 In the absence of a neg-, ~9 Z/ U# G; ?5 v. y' e
ative initial history of androgen exposure, our
' T0 m% C( V# E; a7 h+ w+ W9 Hbiggest concern was virilizing adrenal hyperplasia,$ r0 N8 R( ]7 V f% _
either 21-hydroxylase deficiency or 11-β hydroxylase) ]$ U) ^$ z# p' f {7 k
deficiency. Those diagnoses were excluded by find-
8 a3 s1 S0 ~% o# ting the normal level of adrenal steroids.
9 ~9 q! ]9 {0 h# t( uThe diagnosis of exogenous androgens was strongly+ `5 L& {. P' x; j
suspected in a follow-up visit after 4 months because6 b5 ?) V$ p* `1 b% a9 V6 l
the physical examination revealed the complete disap-( j$ \/ j& i. a6 i3 C' u
pearance of pubic hair, normal growth velocity, and
% f" r6 ]# h! }1 R) `3 t; Wdecreased erections. The father admitted using a testos-6 K2 U2 V. S3 w* k
terone gel, which he concealed at first visit. He was
. Z+ S$ i* U c5 s6 iusing it rather frequently, twice a day. The Physicians’7 c1 F, C/ x7 |) A. p& o
Desk Reference, or package insert of this product, gel or/ V c, ]; x' L- q/ q
cream, cautions about dermal testosterone transfer to2 h; A$ s7 {# W0 U' i8 U* B+ C
unprotected females through direct skin exposure.! `# x. \6 o" B w# M
Serum testosterone level was found to be 2 times the; z' @ s7 i6 Y% F( L
baseline value in those females who were exposed to" d0 C8 Y( F" X) U) r9 @
even 15 minutes of direct skin contact with their male
) k6 g9 z7 K! A% p1 Q( T0 @% Spartners.6 However, when a shirt covered the applica-4 f5 F( v7 l4 K" [
tion site, this testosterone transfer was prevented.% x1 I4 y5 B B J; b
Our patient’s testosterone level was 60 ng/mL," s) s$ F, c! c+ @8 X( P. u
which was clearly high. Some studies suggest that
f ~% A/ v- {5 `dermal conversion of testosterone to dihydrotestos-2 t! B$ b3 V, Y G
terone, which is a more potent metabolite, is more
) S/ }* U5 f6 x% k- \& nactive in young children exposed to testosterone+ P6 b: X( ]9 M) x
exogenously7; however, we did not measure a dihy-& G$ q7 Q* s" a; e: k" Z/ A
drotestosterone level in our patient. In addition to
: B$ z2 M6 ]5 J6 }0 Z0 Svirilization, exposure to exogenous testosterone in
7 ]. o3 X7 p5 Mchildren results in an increase in growth velocity and$ s* B. e7 B9 }' }5 J
advanced bone age, as seen in our patient.. }6 }8 L$ H% T
The long-term effect of androgen exposure during. @9 s+ s$ F0 q- Y i6 Y
early childhood on pubertal development and final
8 P& Z7 d; ?" t0 x& T- u, Y4 Hadult height are not fully known and always remain7 x0 }0 r- [& z6 F3 c- \3 k
a concern. Children treated with short-term testos-
$ k2 R4 z7 L" n7 qterone injection or topical androgen may exhibit some: V7 U% }7 @. |0 a2 R
acceleration of the skeletal maturation; however, after
1 S/ E; Z0 D. mcessation of treatment, the rate of bone maturation0 r9 t2 _( m* F2 m% b O/ R
decelerates and gradually returns to normal.8,9% S7 x- Z0 M0 B3 s- `
There are conflicting reports and controversy( E: q' K2 x/ L, U) Q6 @" S/ ^
over the effect of early androgen exposure on adult( W# @( Q2 E/ T, `
penile length.10,11 Some reports suggest subnormal
1 J: _* s& [. K( tadult penile length, apparently because of downreg-
- h3 s% n" `4 D% ?+ kulation of androgen receptor number.10,12 However,
$ s( Z6 I3 j, n3 jSutherland et al13 did not find a correlation between+ ?# J* ?- y+ S7 _
childhood testosterone exposure and reduced adult8 G# \$ a/ f2 }" c( s; q
penile length in clinical studies.
5 l8 z+ M# l" ZNonetheless, we do not believe our patient is
" e' ^. O9 q+ F) f; Dgoing to experience any of the untoward effects from
0 C# C, l) ?; N3 T1 v- _testosterone exposure as mentioned earlier because
& a* o8 z8 O6 R! Cthe exposure was not for a prolonged period of time." G$ \: _$ _# G- P
Although the bone age was advanced at the time of5 N9 U/ h* L; @' j l% Q g
diagnosis, the child had a normal growth velocity at
$ C6 [! ?) V' a5 t% qthe follow-up visit. It is hoped that his final adult
( ~! x2 g( m) {. Mheight will not be affected.) f! ~. N) z7 i# B+ z
Although rarely reported, the widespread avail-
) X, T z& @4 J, W) zability of androgen products in our society may# T- j) O! n7 L1 F8 Z: b( t
indeed cause more virilization in male or female+ y' [* V2 u2 k
children than one would realize. Exposure to andro-" P8 M2 I/ N. q; T% D
gen products must be considered and specific ques-% M. }# u K+ U! _0 F2 O
tioning about the use of a testosterone product or& m6 w/ b, q7 h/ F. q3 G$ {
gel should be asked of the family members during' o4 @: A1 C8 r ^0 h5 S
the evaluation of any children who present with vir-
* F+ C9 U! R4 {% L j7 wilization or peripheral precocious puberty. The diag-
( P) `" h5 O4 i0 B, ~' |. b, G3 Vnosis can be established by just a few tests and by
7 s# h! |2 I v$ ~' Lappropriate history. The inability to obtain such a5 \' m+ Y" w- P& r' j- U
history, or failure to ask the specific questions, may( e" O3 W* j, t& R; s$ }
result in extensive, unnecessary, and expensive
" ]0 c( n6 P4 x3 ?6 { @6 u& F4 vinvestigation. The primary care physician should be
# m" J' ~$ B# c+ l$ f; d' @2 [7 S9 Z1 oaware of this fact, because most of these children
( ~& M3 S5 n. S7 q4 `# ^7 imay initially present in their practice. The Physicians’
1 s" H: I1 j) o: |" H6 N' bDesk Reference and package insert should also put a
8 B: A4 L* C( r+ q3 lwarning about the virilizing effect on a male or
9 F4 \" [; c, Ufemale child who might come in contact with some-" s- z6 d" n9 i: Z
one using any of these products.
: N+ S* U$ N6 W* W3 MReferences
+ v* \0 d: E# X& x4 t" p1. Styne DM. The testes: disorder of sexual differentiation
7 _# z1 ~9 e3 R) |' ~" H! ^and puberty in the male. In: Sperling MA, ed. Pediatric
0 K0 G1 }0 V) L) q0 YEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;" s0 s+ _5 g) ?: z7 T9 V; G. o
2002: 565-628.3 k5 G- _( p; h/ O2 I4 {
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious) r o' N( ]3 a0 ~' _, {
puberty in children with tumours of the suprasellar pineal9 P4 D" `. H, J! |2 Y
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 S8 I# [0 b0 Z, ^- uTopical Testosterone Exposure / Bhowmick et al 543" H% ~ d9 {1 `% W8 n T
areas: organic central precocious puberty. Acta Paediatr.) h/ ~% J$ p) s2 T
2001;90:751-756.
' P( o1 l) O( i- S- M3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
: H; h7 L6 _, ]Pediatric Endocrinology. 4th ed. New York, NY: Marcel
2 V0 C' f9 H W! ~Dekker Inc; 2003:211-238.
8 q% E. r2 @; a5 d( n4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
) q; J0 Z: c2 @* sdevelopment in a two-year-old boy induced by topical& q, h( {, a4 z) S2 j, M
exposure to testosterone. Pediatrics. 1999;104:e23.
2 A9 i7 z' k+ ~7 z5 k! O5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
. X0 M: C& s, B. q/ oSkeletal Development of the Hand and Wrist. 2nd ed.
4 U7 ~& p& y6 J) \( Z) P4 nStanford, CA: Stanford University Press; 1959.
& `5 A. v5 l2 f% D* j5 N' m% k6. Physicians’ Desk Reference. Androgel 1% testosterone,
! G" Z1 P! T- I& A+ GUnimed Pharmaceutical Inc. Montvale, NJ: Medical8 y! P0 x% }. Y! \
Economics Company, Inc; 2004:3239-3241.
% L, F) f% k( R( ?$ `7. Klugo RC, Cerny JC. Response of micropenis to topical5 v# d! [6 n5 w" V9 q4 R, \8 J
testosterone and gonadotropin. J Urol. 1978;119:
$ F: n/ c" ?+ W667-668.
) o, ?2 g2 i2 C6 r% k2 B: V8. Guthrie RD, Smith DW, Graham CB. Testosterone
7 Y# S* s8 A$ N% f' R ?treatment for micropenis during early childhood. J Pediatr.
3 b2 g4 I" y3 A: C; J1973;83:247-252." }8 A3 _) A! @6 D
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone9 O3 O9 U! X. J3 o% [2 }. y
therapy for penile growth. Urol. 1975;6:708-710.
8 n6 U9 ^; o" J4 u3 g10. Husmann DA, Cain MP. Microphallus: eventual phallic
, u u: O8 V% b: V! K+ ?( Csize is dependent on the timing of androgen administra-
/ F5 S* A8 K+ x9 ^tion. J Urol. 1994;152:734-739.
4 s0 C8 u0 a- g4 f: m" f11. McMahon DR, Kramer SA, Husmann DA. Micropenis: r" y8 O6 s5 p
does early treatment with testosterone do more harm
. d B) n# @* Y. ?1 [6 `4 qthan good? J Urol. 1995;154:825-829.
0 Y# b& ]+ ^1 |+ D O. O$ E9 p7 r7 x12. Takane KK, George FW, Wilson JD. Androgen receptor
& x* j7 ~$ t6 b/ {& b! aof rat penis is down-regulated by androgen. Am J Physiol.
+ L' N, W# y! m" S! ~# C1990;258:E46-E50.
: O* @* I; J, \7 {4 G$ Z13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
R% c5 u5 g9 z6 R6 Xof prepubertal androgen exposure on adult penile
( x/ M: r( @: ]) q* _0 p9 z5 ~length. J Urol. 1996;156:783-787. |
|