- 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
8 k: ^+ k% F* t# X& ?9 Rprecocious puberty (CPP), which is mediated
" ?: q* {- T6 wthrough the hypothalamic pituitary gonadal axis, has
T% p A* B% O& |& L; w# o6 ~3 Z/ k9 \+ Ja higher incidence of organic central nervous system
$ R+ u3 _. d6 {: `& P; m, blesions in boys.1,2 Virilization in boys, as manifested0 a8 g" M/ c6 S5 R% B. r
by enlargement of the penis, development of pubic
% v' h: c" @% c* c4 X. Bhair, and facial acne without enlargement of testi-
' J; v; y! ]4 R8 w( c& Y$ z! Ucles, suggests peripheral or pseudopuberty.1-3 We7 e6 z. J$ j* _9 j0 Y/ Z
report a 16-month-old boy who presented with the
& F- k% A/ G8 l& ]) Kenlargement of the phallus and pubic hair develop-1 R x0 W! A3 u# `' C+ {
ment without testicular enlargement, which was due
/ ~, ]. E/ }* o. Tto the unintentional exposure to androgen gel used by# D6 r$ ^- h4 F" A* ~
the father. The family initially concealed this infor-
% ?6 \% N7 z, m% O( l2 M, e( V1 Y; Bmation, resulting in an extensive work-up for this- g N5 w9 D- i7 K- }
child. Given the widespread and easy availability of6 _5 W1 T8 d2 o/ s) b7 T
testosterone gel and cream, we believe this is proba-
( f9 k/ A2 Y3 q; Cbly more common than the rare case report in the
4 d" g, O1 r6 x* ~literature.4
/ X+ [+ ~( P& W$ b [. s* ?; ~Patient Report
# R' m. ~% n p. d# I& \A 16-month-old white child was referred to the) f- c9 C4 n" x3 ?! r* p. N
endocrine clinic by his pediatrician with the concern( ~2 f X( O, k' g8 N
of early sexual development. His mother noticed# }1 B4 O- g( _. [* |, s0 M4 n
light colored pubic hair development when he was* _* L/ a2 V! ~8 N# L( b
From the 1Division of Pediatric Endocrinology, 2University of# V8 \, O* L2 f$ J* @& C4 ?
South Alabama Medical Center, Mobile, Alabama.7 X) ]0 W( H1 `: J
Address correspondence to: Samar K. Bhowmick, MD, FACE,% _1 h. P9 J. X" d% S- @
Professor of Pediatrics, University of South Alabama, College of
$ s8 ^7 |* G. Z+ } v9 x6 qMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
- ]1 P% }) A* U2 j6 ne-mail: [email protected].
! n6 n$ x e( q8 x# Aabout 6 to 7 months old, which progressively became
8 K6 H: L! {1 U" F5 ?4 f; _) R3 udarker. She was also concerned about the enlarge-
+ _1 p/ @1 l) y X* bment of his penis and frequent erections. The child
% n6 C( b9 t3 T. d" l: A! wwas the product of a full-term normal delivery, with# [# N+ t3 l" a6 j% o! r
a birth weight of 7 lb 14 oz, and birth length of
: D1 H( t8 Q# I) g* \ s$ ^20 inches. He was breast-fed throughout the first year
3 O% L) s3 E' M3 q" a" |of life and was still receiving breast milk along with; P( x# s. J" x3 U0 A! D2 `( ]
solid food. He had no hospitalizations or surgery,+ K! U& k4 t% A4 @1 g
and his psychosocial and psychomotor development; j3 O, ?% E7 W" j! @. R
was age appropriate.
4 ^1 e0 `- f0 J5 O# a1 C7 pThe family history was remarkable for the father,
3 C+ i4 n4 U+ qwho was diagnosed with hypothyroidism at age 16,; Y( A' Q) g1 B" f
which was treated with thyroxine. The father’s
3 A/ o% D9 q* S$ E9 P) X8 K& I3 {height was 6 feet, and he went through a somewhat4 Q+ h9 F- \* h, T" o( P- \& F
early puberty and had stopped growing by age 14.4 V* P0 I5 i( \3 k9 A" Z [
The father denied taking any other medication. The
G @) `( E# \1 d; C! ?child’s mother was in good health. Her menarche) l) K3 Q% M5 M8 j6 z
was at 11 years of age, and her height was at 5 feet( |* K1 U4 N1 G# q
5 inches. There was no other family history of pre-# m; g7 o! n' t+ h. Y$ P
cocious sexual development in the first-degree rela-3 X* C; T* Y, j* T! n9 }
tives. There were no siblings.
4 o! H& X% l7 ?( x( x" M `( h; BPhysical Examination
- ]: Y0 X! w4 B6 B- ]9 x) SThe physical examination revealed a very active,
9 C9 G, t; F% Fplayful, and healthy boy. The vital signs documented5 @6 t( ~+ }: V) t/ _1 s
a blood pressure of 85/50 mm Hg, his length was b; V% [6 b0 G- Y. N& w
90 cm (>97th percentile), and his weight was 14.4 kg
1 J7 ~( W. l6 u& i0 [4 Q, e" ?8 R(also >97th percentile). The observed yearly growth* O" b. C, M9 p* O/ n9 [
velocity was 30 cm (12 inches). The examination of
4 Z) U/ r) _) s, b8 v9 Y7 mthe neck revealed no thyroid enlargement.; }. X8 o W" o3 g, }' J2 |% V
The genitourinary examination was remarkable for8 K% {/ O, _3 l# s$ z* m" U
enlargement of the penis, with a stretched length of
2 y' O7 p+ z- D1 D5 {8 cm and a width of 2 cm. The glans penis was very well9 ~0 c0 S3 c& u. t- I& N
developed. The pubic hair was Tanner II, mostly around
; ]/ b4 f+ u9 I7 t540. s+ q7 x1 ?/ w3 ^# h; ^
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
) x# z; F, Y8 I1 F7 d' ?the base of the phallus and was dark and curled. The: x3 q1 {7 }) g8 A x4 z9 `: y
testicular volume was prepubertal at 2 mL each.
0 W. h4 r9 O! c' C. vThe skin was moist and smooth and somewhat/ t1 `) y/ m# h: O
oily. No axillary hair was noted. There were no8 |7 i0 W. F, F6 m2 B8 a9 `# w: s
abnormal skin pigmentations or café-au-lait spots.
& ~# k! u+ p& T! g8 uNeurologic evaluation showed deep tendon reflex 2+- |0 A j$ U2 I/ e: U2 C0 t6 g2 S
bilateral and symmetrical. There was no suggestion
3 t4 z8 m9 M( Y! l; B M. d6 nof papilledema.# O3 c/ \: M4 D, _1 p
Laboratory Evaluation
* K0 L0 {+ h' w6 q4 N6 n5 LThe bone age was consistent with 28 months by
$ r* M C& H8 s5 pusing the standard of Greulich and Pyle at a chrono-
1 i( K4 r E6 G, d2 r, M7 i2 Flogic age of 16 months (advanced).5 Chromosomal4 ?. P, K) a6 c: I) P% K2 K
karyotype was 46XY. The thyroid function test, P5 ]+ H, v2 |" g/ p
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
0 i6 X1 Y. ] q7 \lating hormone level was 1.3 µIU/mL (both normal).+ n9 n5 I: E0 d# t" P7 h/ H
The concentrations of serum electrolytes, blood
, n7 B8 s" l2 Q* V8 lurea nitrogen, creatinine, and calcium all were
?8 k$ ~. A: ^* n: C4 Uwithin normal range for his age. The concentration
3 Q: B I# z- Pof serum 17-hydroxyprogesterone was 16 ng/dL
1 a6 Y' x; v. _(normal, 3 to 90 ng/dL), androstenedione was 209 y$ t6 d+ b8 M) g& q
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-7 O. i/ L3 K7 O' [. P; S1 B
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
% H3 A* `5 { `; K/ idesoxycorticosterone was 4.3 ng/dL (normal, 7 to, k" l B: N) V& I* Q& P( {
49ng/dL), 11-desoxycortisol (specific compound S)
a, ]) N- f1 Z5 F) T# o* pwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-1 v4 m0 q2 D& s1 Q( x, w
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
# K: d, U: K! E# Ttestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
9 Y2 G! d5 \2 L. |+ o3 Oand β-human chorionic gonadotropin was less than! z) L: j- E7 x6 y4 O* c
5 mIU/mL (normal <5 mIU/mL). Serum follicular8 m* F5 N8 ~& p8 d
stimulating hormone and leuteinizing hormone- M1 I% H0 F& I; N7 ~
concentrations were less than 0.05 mIU/mL# D& e7 [1 x- e' ^! h
(prepubertal).+ e% z, Z9 E: G# K
The parents were notified about the laboratory1 i, M- |# l1 X% W- V' c- M
results and were informed that all of the tests were
! o" D' ~" D1 S0 q2 ]% Q5 fnormal except the testosterone level was high. The% p1 R( l% ~) Y3 \! m+ T
follow-up visit was arranged within a few weeks to1 e$ N' N/ s( p. c* T8 ]& H( s
obtain testicular and abdominal sonograms; how-
# y( o* c1 I. K- U, Pever, the family did not return for 4 months.* C0 o1 i6 u w4 K2 M. ~
Physical examination at this time revealed that the' G a: v( t# R: }/ C
child had grown 2.5 cm in 4 months and had gained% d0 b' s0 i q1 _) H9 r V* s
2 kg of weight. Physical examination remained! J7 J) Y* `" N6 W' }6 h" g6 D
unchanged. Surprisingly, the pubic hair almost com-$ r- L' G5 \9 e% P' |1 Z$ F1 C! S
pletely disappeared except for a few vellous hairs at8 z& C. f- a& w- u: k0 S
the base of the phallus. Testicular volume was still 27 s ?1 ?! o3 {. _9 ]! Y. y0 ]# L8 B5 T, k* H
mL, and the size of the penis remained unchanged.
1 n( C0 P, V- D* rThe mother also said that the boy was no longer hav-- ]! D( j: b- A+ |' h3 Y: E
ing frequent erections.1 a: A, y4 [, B
Both parents were again questioned about use of8 `6 T. q; y- Y$ b
any ointment/creams that they may have applied to
* M2 @4 ?0 U& c; s4 s! [1 fthe child’s skin. This time the father admitted the, m6 s; | e% C' q' F j% C
Topical Testosterone Exposure / Bhowmick et al 541
% `: K* ~) X+ i: A6 Fuse of testosterone gel twice daily that he was apply-6 O1 _9 a: g) Q m+ K$ P$ j
ing over his own shoulders, chest, and back area for$ V0 h- m7 d* ]
a year. The father also revealed he was embarrassed
d' [5 V9 q( V6 r! w" x: I: xto disclose that he was using a testosterone gel pre-0 l, i \ ^4 s/ {' Z
scribed by his family physician for decreased libido! K: o) g2 j9 d+ Q. p2 O! |
secondary to depression.
; k& s# G6 g/ v# ]( oThe child slept in the same bed with parents.
1 |7 K) d' M) ~, z0 v* DThe father would hug the baby and hold him on his, z2 u6 v; d8 i& j8 X( X) z
chest for a considerable period of time, causing sig-7 x! w5 x" R, ~$ g
nificant bare skin contact between baby and father.: A8 d: T, d& d; a$ R- n
The father also admitted that after the phone call,
. }6 b* K3 {1 Qwhen he learned the testosterone level in the baby
E5 K$ s' d6 Z h! hwas high, he then read the product information
( D0 }9 o. O$ ]0 D0 |9 u- Apacket and concluded that it was most likely the rea-
$ w Z4 b: T! F. X: N; M) dson for the child’s virilization. At that time, they1 W% f8 O( T4 @7 z" {
decided to put the baby in a separate bed, and the" K s) q: T; ]+ z6 q; T6 s) M
father was not hugging him with bare skin and had
9 Y1 g% }) Z7 e' O' D! ?been using protective clothing. A repeat testosterone
( q! q& E6 h, J( d: ~test was ordered, but the family did not go to the
3 M w6 H* C, `$ x8 k' Y( m% [5 olaboratory to obtain the test./ o: d! c3 K% i$ f/ Q4 @6 \; y
Discussion4 g6 n: X4 E( x! v4 h4 ?7 Q+ E
Precocious puberty in boys is defined as secondary
' S& q& i3 X, b' usexual development before 9 years of age.1,43 s' D+ P2 Y- d) o3 P1 K7 {8 \4 d
Precocious puberty is termed as central (true) when
( E' P. d9 R6 | yit is caused by the premature activation of hypo-' O- o5 I5 }+ Z! f
thalamic pituitary gonadal axis. CPP is more com-) ]& k" c; x' \: Q0 _2 G' ~
mon in girls than in boys.1,3 Most boys with CPP
$ v# H- e/ s" h- @3 t; U0 {+ |may have a central nervous system lesion that is
2 P2 p* x. m- k& N, m' E; N- m5 sresponsible for the early activation of the hypothal-
0 I0 k5 ~8 k6 B9 W9 ~, Q6 x' aamic pituitary gonadal axis.1-3 Thus, greater empha-
% f u) ^6 A* ]' z* l' Osis has been given to neuroradiologic imaging in
' N) T/ \% Z) R+ Hboys with precocious puberty. In addition to viril-' T. U0 c; e8 m( i
ization, the clinical hallmark of CPP is the symmet-9 f& j. j6 A" z7 ?1 r! ]7 C
rical testicular growth secondary to stimulation by% p6 P- \* d7 _ D5 a7 P
gonadotropins.1,3
2 A! h; P0 e) J& S9 I6 ^Gonadotropin-independent peripheral preco-9 ^8 _- [) e; W$ M" o, z) I S, x
cious puberty in boys also results from inappropriate( D$ [) @8 b4 V% k( [
androgenic stimulation from either endogenous or
8 Y8 ?. u1 [8 M! M5 ?+ Yexogenous sources, nonpituitary gonadotropin stim-
" T; G( r+ M0 G- Hulation, and rare activating mutations.3 Virilizing3 ] I+ c' Y3 L; f. V* S3 n% Y
congenital adrenal hyperplasia producing excessive1 G: A) B8 v* L" v; w
adrenal androgens is a common cause of precocious
2 K! }! r* j2 y3 E9 `( @puberty in boys.3,4! R G$ a4 |4 f6 r u3 B) n8 R' A
The most common form of congenital adrenal
6 F' s2 E0 S& J6 `% mhyperplasia is the 21-hydroxylase enzyme deficiency. V' Z1 E* r" ` W: j& A* Q7 j2 b* P1 m
The 11-β hydroxylase deficiency may also result in# p' |. w! }% l: M
excessive adrenal androgen production, and rarely,4 ~. ^5 a4 M% S( o5 n
an adrenal tumor may also cause adrenal androgen
D' ~5 Z, Q: y7 w0 p6 N+ hexcess.1,3% n" F5 k$ \+ H4 ?
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 E9 T) f. K- z" Z542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
# ~7 w" y: V1 ]% w) C) [( \A unique entity of male-limited gonadotropin-
1 z+ @: D; G! G% Tindependent precocious puberty, which is also known
/ |: k) f4 e6 e" ?as testotoxicosis, may cause precocious puberty at a
# z# @" ]3 s6 v1 w% Xvery young age. The physical findings in these boys
/ \6 t$ }! f/ e5 o4 e% Twith this disorder are full pubertal development,' V; J8 W) m: f3 o' _+ M& R7 D+ v
including bilateral testicular growth, similar to boys
1 |* U' v4 p* ?with CPP. The gonadotropin levels in this disorder
$ [" T8 O5 b$ M' V! nare suppressed to prepubertal levels and do not show2 `' a; |9 q7 ~
pubertal response of gonadotropin after gonadotropin-1 ^9 Y0 f( d% ^3 h9 Q
releasing hormone stimulation. This is a sex-linked8 i0 Q7 K/ R6 E- I/ l, _
autosomal dominant disorder that affects only3 {& p* w' j' I' {% J8 Y% D- d; j
males; therefore, other male members of the family
" W' l. G% @% B7 V3 J6 L, n# z8 Ymay have similar precocious puberty.3 t8 Z* k$ x& H4 [+ q
In our patient, physical examination was incon-2 r: @2 s+ _! f; J
sistent with true precocious puberty since his testi-
/ _' |8 e3 K" v. B O- G! vcles were prepubertal in size. However, testotoxicosis
( n R' r& b ?was in the differential diagnosis because his father+ Q& I8 @" z3 r# L; g: l
started puberty somewhat early, and occasionally,0 Y0 i3 r# j8 M0 j- }
testicular enlargement is not that evident in the
9 V. X4 l7 X1 g* P4 mbeginning of this process.1 In the absence of a neg-
' B" E0 P8 }. Oative initial history of androgen exposure, our n0 U6 S* P2 U& t5 d3 |
biggest concern was virilizing adrenal hyperplasia,. q, s a3 l! e4 r7 t* \
either 21-hydroxylase deficiency or 11-β hydroxylase
/ y% f# i+ H: d; m1 T9 g0 {/ Pdeficiency. Those diagnoses were excluded by find-5 u9 |8 B. E4 F! B
ing the normal level of adrenal steroids.
@9 a0 D. R* bThe diagnosis of exogenous androgens was strongly9 x) u% p% d: o7 u7 E
suspected in a follow-up visit after 4 months because; Q/ w+ R: z5 Q9 U" M( W
the physical examination revealed the complete disap-# v, _. g4 H- F2 H
pearance of pubic hair, normal growth velocity, and
5 E7 F( k* e& f9 r- |) G' t1 Rdecreased erections. The father admitted using a testos-# x# [" m( Z( T) j; A
terone gel, which he concealed at first visit. He was
( r% C/ m7 l" I pusing it rather frequently, twice a day. The Physicians’
3 \" @" {3 _: X3 `Desk Reference, or package insert of this product, gel or
9 _1 N9 W* x- ~cream, cautions about dermal testosterone transfer to
% a7 ?, b! q* b1 l, C+ ^( F- ~unprotected females through direct skin exposure.
+ t1 C. r7 C3 ]6 |( A V" b9 HSerum testosterone level was found to be 2 times the
8 |, n/ f$ H# [5 ^0 l0 ubaseline value in those females who were exposed to& e* B2 b' F2 L
even 15 minutes of direct skin contact with their male
: f( E7 }1 N8 U/ K2 `7 hpartners.6 However, when a shirt covered the applica-
/ e# e- d4 k2 q* B5 P& C/ @3 Wtion site, this testosterone transfer was prevented.( X# e& S. K) u! H: I/ F1 O
Our patient’s testosterone level was 60 ng/mL,: u) I% y6 |" @, u) g: x0 ~0 G
which was clearly high. Some studies suggest that
; @; x5 V# Z, Vdermal conversion of testosterone to dihydrotestos-% h' h# M# X Z1 v/ x5 P9 U) V
terone, which is a more potent metabolite, is more$ s8 V. ?* L( n1 v% f2 ?: C* }
active in young children exposed to testosterone% W3 p$ b7 F# Y* h
exogenously7; however, we did not measure a dihy-
9 t$ y) B) q# {# V% t# ?. s4 vdrotestosterone level in our patient. In addition to
4 ^) `% j8 Q* U+ \virilization, exposure to exogenous testosterone in1 f3 ~; l/ }0 H
children results in an increase in growth velocity and
7 g, ]! h P. E& padvanced bone age, as seen in our patient.
% P0 K- N8 w% j* OThe long-term effect of androgen exposure during
: y- A- @1 ~4 Iearly childhood on pubertal development and final+ }. \$ {+ R* Z9 r3 H3 W$ n0 J9 h
adult height are not fully known and always remain6 [& g% e8 n8 Z) }& P
a concern. Children treated with short-term testos-
' @: V6 G* g; @5 K* i% J, J$ k fterone injection or topical androgen may exhibit some
0 u3 U3 W/ l$ o% zacceleration of the skeletal maturation; however, after. p5 F$ u: n, s" A& q& {0 C" V
cessation of treatment, the rate of bone maturation
6 q8 P" V1 O3 T: h2 k& @1 zdecelerates and gradually returns to normal.8,9
( f" W+ R2 u6 ]. ]' [. o% b$ WThere are conflicting reports and controversy* [% ~* g# i; P
over the effect of early androgen exposure on adult. q8 n* U" g" f
penile length.10,11 Some reports suggest subnormal
5 n! S7 e [6 f( v) k4 w, oadult penile length, apparently because of downreg-
% ]3 A4 M/ i0 _- W* S( z) ?5 aulation of androgen receptor number.10,12 However,8 E/ z Y5 e1 ^! o. W5 p2 S+ ?
Sutherland et al13 did not find a correlation between6 C8 S* G6 h! u
childhood testosterone exposure and reduced adult7 B- _+ e( G' I- n6 I. Z
penile length in clinical studies.
0 e" K D& g( q1 Q U4 }$ d5 h! ONonetheless, we do not believe our patient is
' T5 [0 \, p2 ~: N/ Y6 Kgoing to experience any of the untoward effects from! r, f2 P5 [' W7 F; ]$ [
testosterone exposure as mentioned earlier because
* n! V1 a% u8 E9 t/ N' \; `the exposure was not for a prolonged period of time.
! l& \2 h9 K, Z3 b+ fAlthough the bone age was advanced at the time of
* Q+ O3 ?3 d+ k9 m0 qdiagnosis, the child had a normal growth velocity at
" @( L- j; w! w/ |% L1 Lthe follow-up visit. It is hoped that his final adult! s) x- H/ i0 t/ m
height will not be affected.
q. g) u2 t$ pAlthough rarely reported, the widespread avail-, o1 z! n. _, a5 [2 l# l
ability of androgen products in our society may
# M7 j6 Q N0 B) k- zindeed cause more virilization in male or female
8 B% G5 Y2 r- D5 t& Vchildren than one would realize. Exposure to andro-2 A4 O/ l) Y# E) P
gen products must be considered and specific ques-
( T9 h u3 e7 T1 i# {. ^tioning about the use of a testosterone product or8 P: P3 k. U. i6 ^
gel should be asked of the family members during0 \* _* _/ m" B `: G! r6 e
the evaluation of any children who present with vir-
- Z! ?) }% o9 ~- q1 u* @. r2 Jilization or peripheral precocious puberty. The diag-
5 p5 X6 T! n1 S( @+ @nosis can be established by just a few tests and by
1 ]9 B, T5 M/ n% @' F! Y0 ]1 happropriate history. The inability to obtain such a0 \) I+ ^: V+ R A
history, or failure to ask the specific questions, may
" ^# B7 l' n7 t Z0 K3 V3 d6 \result in extensive, unnecessary, and expensive# t- V$ ~* c3 Z9 z! M; u+ F
investigation. The primary care physician should be
% S# d8 q+ O" |, faware of this fact, because most of these children
9 V! r. ~( h) l0 G' \/ @4 Imay initially present in their practice. The Physicians’
; o$ J" I* U: n/ b. C2 X9 eDesk Reference and package insert should also put a
4 v! @, C+ L. w$ xwarning about the virilizing effect on a male or2 v* W g) G$ M5 I5 O% }$ d: H
female child who might come in contact with some- \3 h8 F1 W8 y) f% |: W; P! J
one using any of these products.! g+ V0 g: `9 i3 ^5 D5 R
References3 P8 J7 S8 e: I. j1 w! T q
1. Styne DM. The testes: disorder of sexual differentiation
- J2 }* ?" s, ?and puberty in the male. In: Sperling MA, ed. Pediatric
! z5 q5 p3 ?( V/ ^" fEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;5 Y) _) a X' s
2002: 565-628.
; z% m/ A2 W2 ^1 x2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
; m- C+ r# q! W Q9 Y$ Gpuberty in children with tumours of the suprasellar pineal% L" p% l5 t* g# {1 B0 ]% c
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from4 G0 K7 Z" H6 |) z
Topical Testosterone Exposure / Bhowmick et al 543& c+ R8 L. p- {: P8 T
areas: organic central precocious puberty. Acta Paediatr.
; o2 l/ C6 X6 v1 R2001;90:751-756.
" z) a4 z! n. d- s3 I3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.4 t- C2 |2 Z/ _
Pediatric Endocrinology. 4th ed. New York, NY: Marcel/ z: |) n9 ^& \# V: b
Dekker Inc; 2003:211-238.0 V. y" {0 C6 e5 Y; j5 D v9 p
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
( `# b7 `; o' {% J4 Ldevelopment in a two-year-old boy induced by topical- f1 i$ L' |$ Z& {' F
exposure to testosterone. Pediatrics. 1999;104:e23.
& M& B! D" Q- `( P$ t5. Greulich WW, Pyle SI, eds. Radiographic Atlas of$ b% D" }2 l2 A5 b/ T5 J
Skeletal Development of the Hand and Wrist. 2nd ed.
* s, n. j, t$ o% Q8 _& X! AStanford, CA: Stanford University Press; 1959.3 o4 q2 w6 }/ q, A: Z! z0 q. t& t/ r
6. Physicians’ Desk Reference. Androgel 1% testosterone,# p R) J, Y5 K9 s: G
Unimed Pharmaceutical Inc. Montvale, NJ: Medical# t+ t/ u9 S( p% F5 ~3 K
Economics Company, Inc; 2004:3239-3241.+ W. T! I' N$ ?' B- ]# X- y4 ?
7. Klugo RC, Cerny JC. Response of micropenis to topical4 Y' ]. S1 _" K: g2 X# Z5 \0 j
testosterone and gonadotropin. J Urol. 1978;119:
$ A) O! h- _ P! B* o7 L3 f: z6 V667-668.
3 h" g, X6 j4 H8. Guthrie RD, Smith DW, Graham CB. Testosterone
/ T% C9 s" R2 i5 U! a. d" Otreatment for micropenis during early childhood. J Pediatr. J# {3 ], H3 r7 t# \, v q6 i
1973;83:247-252.* ^1 N! ~& h; E( Q R
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone- A6 D4 G( s% T& ]4 _5 z
therapy for penile growth. Urol. 1975;6:708-710.
) A8 O4 ?( [7 o5 C( s, a: Z" z10. Husmann DA, Cain MP. Microphallus: eventual phallic! L; N& Q4 p: u9 J9 Y# ~
size is dependent on the timing of androgen administra-- o) U. k+ j) }, j
tion. J Urol. 1994;152:734-739.* C( J$ N, O( Z5 ^: F
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:, p p! A0 h- Q" \' C0 N4 g. _' |8 B7 }
does early treatment with testosterone do more harm2 y3 s5 K- v* B7 y2 u
than good? J Urol. 1995;154:825-829.* i$ D( _# |- n7 q; l) |. k( U
12. Takane KK, George FW, Wilson JD. Androgen receptor& E6 z/ z$ d9 ] W! Q! m" x
of rat penis is down-regulated by androgen. Am J Physiol.
3 c O7 d I- x# c- d' C1990;258:E46-E50. t( J2 y& r3 S
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
7 q' E0 ]: W, K0 W1 K/ ?! rof prepubertal androgen exposure on adult penile
; N' t9 [5 c2 n3 U8 `length. J Urol. 1996;156:783-787. |
|