- 註冊時間
- 2023-5-6
- 精華
- 在線時間
- 小時
- 米币
-
- 最後登錄
- 1970-1-1
累計簽到:5 天 連續簽到:1 天
|
發表於 2025-1-4 03:38:58
|
顯示全部樓層
is a significant concern for physicians. Central0 {* ~2 m( _, _* E4 W2 \
precocious puberty (CPP), which is mediated. _( ]" u2 c5 _+ I* P) `! G
through the hypothalamic pituitary gonadal axis, has; e' B; ]! r3 ` D
a higher incidence of organic central nervous system
. [" a( R+ E' P6 ]: {lesions in boys.1,2 Virilization in boys, as manifested8 u7 H# e2 L* p
by enlargement of the penis, development of pubic% g4 t, } o" y- y" F/ ~; N6 M3 l8 |
hair, and facial acne without enlargement of testi-7 L( F' d+ i8 r% y
cles, suggests peripheral or pseudopuberty.1-3 We( P0 t+ M% K8 \$ O* D, W8 K7 d
report a 16-month-old boy who presented with the
) ^: V5 X: s4 m9 w+ u$ v3 renlargement of the phallus and pubic hair develop-
0 s! Y- ^0 y/ J, i4 w" N. jment without testicular enlargement, which was due
' }2 r( K9 Z$ q0 Ato the unintentional exposure to androgen gel used by7 U: v1 c3 v+ C: S4 k, R& T% i
the father. The family initially concealed this infor-9 }* e: o7 X+ `9 M. I- l
mation, resulting in an extensive work-up for this
- a* V/ Q/ S K! H6 Bchild. Given the widespread and easy availability of
9 G) \' ?9 K# u& G5 n& y1 I; o' ltestosterone gel and cream, we believe this is proba-- J+ ] |, T* H+ ~
bly more common than the rare case report in the; P( p8 M. n$ E& {* ^
literature.4
7 n3 g! y( n! [7 R1 YPatient Report
* V M4 t3 j9 j- `9 zA 16-month-old white child was referred to the
3 f0 Z' l( \/ e# M; e7 \endocrine clinic by his pediatrician with the concern7 L9 H+ ^- w; A) m6 p! h' \
of early sexual development. His mother noticed
0 W' i H5 F& Q1 qlight colored pubic hair development when he was! D0 r3 Z' f) Y* O7 d2 Y
From the 1Division of Pediatric Endocrinology, 2University of1 w8 y- u- t) v9 V6 w$ Y
South Alabama Medical Center, Mobile, Alabama.
S& y- ]- X$ w% VAddress correspondence to: Samar K. Bhowmick, MD, FACE,
X0 t3 e9 V/ E& @# H0 qProfessor of Pediatrics, University of South Alabama, College of
* {2 u4 j& I( IMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
0 Z5 o7 P; z; f5 b" e. f5 i; We-mail: [email protected].5 s+ ^, i' T5 }' K
about 6 to 7 months old, which progressively became* N( u# g( I4 w$ I% M
darker. She was also concerned about the enlarge-
! A1 N' r/ D5 O0 V) f" ~1 e2 zment of his penis and frequent erections. The child5 I N h3 q4 _ s3 T
was the product of a full-term normal delivery, with2 v3 w: s5 y' ~. v% \
a birth weight of 7 lb 14 oz, and birth length of
8 Q# } {- R( v20 inches. He was breast-fed throughout the first year( E9 x7 ]' | Z+ Q; L
of life and was still receiving breast milk along with4 E8 t1 c5 ]5 n! U8 o
solid food. He had no hospitalizations or surgery,$ T# F( R6 L; k2 m
and his psychosocial and psychomotor development
$ L; Y u5 I9 K, t0 s( `: m6 m! }was age appropriate.
" Y9 T5 L+ k n+ rThe family history was remarkable for the father,+ `: s/ @. a/ l$ X: K6 f/ l
who was diagnosed with hypothyroidism at age 16,
2 o4 x$ x. i/ \$ \' cwhich was treated with thyroxine. The father’s8 l* `- C8 l+ P. ]- _& d$ R
height was 6 feet, and he went through a somewhat
" ?) Y5 C( ^/ [early puberty and had stopped growing by age 14.5 n( E! R4 h# ?+ z a& N$ [
The father denied taking any other medication. The! V6 j _. ? x3 |! F9 q) P) \, U: a
child’s mother was in good health. Her menarche
4 y! v7 {( b" cwas at 11 years of age, and her height was at 5 feet9 _& \' K, i5 P2 ?7 b
5 inches. There was no other family history of pre-; P' d0 H# q! c+ u
cocious sexual development in the first-degree rela-
5 y- ~2 O8 L- y5 V8 dtives. There were no siblings. F# D" J) W* y/ T' e. [' n5 j
Physical Examination
+ A6 M; v# D ]2 ~The physical examination revealed a very active,
: l T/ k# r8 F2 q0 _ Y* yplayful, and healthy boy. The vital signs documented1 m7 t; ]7 @" K9 O: [4 o, U+ m" ^
a blood pressure of 85/50 mm Hg, his length was
; ?3 S7 c* v! Y90 cm (>97th percentile), and his weight was 14.4 kg6 c: ]+ V6 Z Q; [4 _; Q
(also >97th percentile). The observed yearly growth8 x N8 f" f1 w# T* Y$ D
velocity was 30 cm (12 inches). The examination of
; ?" o9 j% b9 w8 |, x& Z6 _6 W+ Wthe neck revealed no thyroid enlargement.0 t! B" m. ?) [8 |1 V3 e
The genitourinary examination was remarkable for
: O0 K4 [5 X+ E: ?enlargement of the penis, with a stretched length of
% x% O" d7 o5 y; n) E8 cm and a width of 2 cm. The glans penis was very well
1 J9 S) Q. z3 D. C0 [0 S% b+ Ndeveloped. The pubic hair was Tanner II, mostly around
$ b! Z6 c7 a9 ?% }$ h3 o8 o$ d540' X! P i3 y. D' x3 G
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
+ x8 |& d% i2 V: X5 a9 E7 f; D7 u6 kthe base of the phallus and was dark and curled. The
) r8 ^6 r$ _# ^- l0 R, ptesticular volume was prepubertal at 2 mL each.
* N y, j3 D( }, N. a5 l8 YThe skin was moist and smooth and somewhat6 S" k/ H8 D3 z& R* s M
oily. No axillary hair was noted. There were no
7 A, g; K3 v- F% uabnormal skin pigmentations or café-au-lait spots.
- h9 ~6 v5 l0 YNeurologic evaluation showed deep tendon reflex 2+$ @5 E) e% {7 _- [) _& t( k
bilateral and symmetrical. There was no suggestion
' G5 ?/ c9 d* M) Gof papilledema.
0 s) S7 R; i! r R2 k' O1 z# wLaboratory Evaluation$ c) @! b* U. Y# j( ` I/ G( a
The bone age was consistent with 28 months by
0 `/ \, D7 S4 V- Ausing the standard of Greulich and Pyle at a chrono-7 A) ]! T. l" i5 d9 F3 K" g
logic age of 16 months (advanced).5 Chromosomal
$ X1 D U& ]9 U5 Y$ ekaryotype was 46XY. The thyroid function test
3 @' `) z* }+ ^showed a free T4 of 1.69 ng/dL, and thyroid stimu-- p1 _8 C% R# x1 M* N; k; ~8 ?
lating hormone level was 1.3 µIU/mL (both normal).
8 g& P$ W# |: Y5 l6 lThe concentrations of serum electrolytes, blood
/ _4 c) z0 @6 @& eurea nitrogen, creatinine, and calcium all were
: F( `1 n: E8 s, {within normal range for his age. The concentration
2 |) E& h w+ H3 _/ fof serum 17-hydroxyprogesterone was 16 ng/dL' h+ S3 Z# E8 p2 Y6 V5 {- m
(normal, 3 to 90 ng/dL), androstenedione was 20
, J6 d! j) y% ?: ~7 Ung/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
5 ]! V4 ?# B4 V! T8 x" F+ \' A. Xterone was 38 ng/dL (normal, 50 to 760 ng/dL),
4 U! `" J- Y% J J9 Adesoxycorticosterone was 4.3 ng/dL (normal, 7 to8 W6 W) w4 A, m/ [
49ng/dL), 11-desoxycortisol (specific compound S)3 l7 Q1 m1 V: Y5 W& J' L
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-3 O; L# ~% V3 R0 P9 |
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total' u1 G z+ B4 b0 L: T' ]' u
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
& D) p& o. E8 F" C- |- zand β-human chorionic gonadotropin was less than+ i2 o" G# [/ }
5 mIU/mL (normal <5 mIU/mL). Serum follicular
]8 A$ X% Y" ?. y$ astimulating hormone and leuteinizing hormone
& s k4 Y# ^+ G) a2 vconcentrations were less than 0.05 mIU/mL
. c& x: a& V: g- Z# m& q6 k& l8 P(prepubertal).
& b# d, R* m$ T8 I! c& @& LThe parents were notified about the laboratory0 w' |2 e( X" z% C) G( \
results and were informed that all of the tests were
- J' Y0 H5 y3 }! ?$ c! Jnormal except the testosterone level was high. The. E4 O5 |0 A. t @
follow-up visit was arranged within a few weeks to
% ?/ E3 S. F' Jobtain testicular and abdominal sonograms; how-6 M" `& N( t& L- ?( b
ever, the family did not return for 4 months.+ b- _. M: f% a$ g6 T. r4 _
Physical examination at this time revealed that the! E/ I8 Z* M+ y9 A* x. p
child had grown 2.5 cm in 4 months and had gained! \% k; t1 l: ?5 c( _, u, C4 G3 ] Q6 W
2 kg of weight. Physical examination remained
y6 Q- r2 p4 O9 Wunchanged. Surprisingly, the pubic hair almost com-
. w" w. |, N4 u) Lpletely disappeared except for a few vellous hairs at
+ v3 N1 Z: Z0 j/ N0 e/ ythe base of the phallus. Testicular volume was still 2/ |- _* O' J/ l3 S! m* z
mL, and the size of the penis remained unchanged.
. L/ |$ b% F/ i2 T5 p7 ~ G4 r! k6 _9 W1 eThe mother also said that the boy was no longer hav-
' t* c4 M) ~7 r% J: @6 x" eing frequent erections.
/ r4 D% Z0 T9 W) j2 f/ m7 c- L( R# dBoth parents were again questioned about use of
8 y- q- k, ?/ H, h1 qany ointment/creams that they may have applied to2 s/ o; f. [6 l) \* |! X& V
the child’s skin. This time the father admitted the
- Z: U: [' Y& p4 [* ?, Q9 T7 KTopical Testosterone Exposure / Bhowmick et al 5417 X3 Q$ P8 i. x, |0 f8 l8 o( h/ _% ~
use of testosterone gel twice daily that he was apply-
: G* F. e$ \2 {0 L7 K* B6 B8 `) j4 Ling over his own shoulders, chest, and back area for
4 e- Y# D6 I' }/ _' c' la year. The father also revealed he was embarrassed
3 ^, X7 Y2 \, G1 Q4 [2 A" k* kto disclose that he was using a testosterone gel pre-
3 W' Y) u k7 ?, D) M+ I" v mscribed by his family physician for decreased libido( G* t& [) k5 S! D5 m. Y9 `
secondary to depression.
4 b) @% Y# {$ B, Y8 @) xThe child slept in the same bed with parents.: E% Z' ?0 G( ` n
The father would hug the baby and hold him on his
4 K, {" \6 l- R& qchest for a considerable period of time, causing sig-
% Q& z, f1 R& v. `( g6 lnificant bare skin contact between baby and father.
, @6 F/ E, F' ~: L1 ?% V9 @The father also admitted that after the phone call,7 O6 B/ }7 n5 `: k) y" s' c; w
when he learned the testosterone level in the baby" i& H$ M0 Z8 a6 v
was high, he then read the product information
0 d, _( i3 _1 y/ e* W# G) E+ mpacket and concluded that it was most likely the rea-
0 b8 {" j, {( i, _6 U9 [4 \% q; oson for the child’s virilization. At that time, they2 T5 b4 R3 D& F7 r5 `: I! `0 f
decided to put the baby in a separate bed, and the! d E- O$ d! O! ]
father was not hugging him with bare skin and had* {4 Q% Q/ p- H! p7 [& j9 J
been using protective clothing. A repeat testosterone
0 d$ m8 _% U/ U' e3 F( Q Dtest was ordered, but the family did not go to the" o# @' f5 A" x, m( } ^" ]
laboratory to obtain the test.
9 k1 k$ O: K% {/ ^3 BDiscussion5 @7 X+ K& {4 X7 @0 u5 s$ C5 x
Precocious puberty in boys is defined as secondary
: O7 A8 d: ~5 R& L6 dsexual development before 9 years of age.1,4. Y, d, ?7 c6 x9 x7 c# J
Precocious puberty is termed as central (true) when" m" c3 a4 Z5 ]$ P9 q7 r, q
it is caused by the premature activation of hypo-
' e8 H9 Q5 m0 Z$ p, k& gthalamic pituitary gonadal axis. CPP is more com-2 r0 q7 p3 \/ B/ L. E
mon in girls than in boys.1,3 Most boys with CPP$ p1 S7 {+ u. I
may have a central nervous system lesion that is
9 `8 V8 m# r0 Jresponsible for the early activation of the hypothal-3 G K4 g' P! m; u: y: ^
amic pituitary gonadal axis.1-3 Thus, greater empha-% k% {' W: V5 @ O5 h. p( k
sis has been given to neuroradiologic imaging in9 r6 T0 p& s/ z3 l6 ^5 z
boys with precocious puberty. In addition to viril-
, D! E: Z* B' P3 k& S# hization, the clinical hallmark of CPP is the symmet-: _$ q7 a( n! N# ?6 T) T
rical testicular growth secondary to stimulation by
5 v' ?8 F! @1 Z# jgonadotropins.1,3
, K' \9 M9 ?8 w/ ~0 EGonadotropin-independent peripheral preco-' G4 U8 }& v2 K' J6 ]
cious puberty in boys also results from inappropriate1 j, U* r2 |1 |2 D& y1 u
androgenic stimulation from either endogenous or
( [8 D8 `* U( e& r Z6 Sexogenous sources, nonpituitary gonadotropin stim-' Y; S. M9 u1 I6 f% M& a5 k) w
ulation, and rare activating mutations.3 Virilizing
! k. x! N# L3 K7 Xcongenital adrenal hyperplasia producing excessive
6 k" M. [2 a6 ~; L: O8 Radrenal androgens is a common cause of precocious
, B* d5 F5 @" j4 spuberty in boys.3,4, c P8 F& B$ T
The most common form of congenital adrenal+ O+ j3 {9 w1 `+ u' [' m
hyperplasia is the 21-hydroxylase enzyme deficiency.
- ?. |; u; F1 d7 T; |+ {4 q& vThe 11-β hydroxylase deficiency may also result in
; ^! n; f# A1 g! [7 x/ cexcessive adrenal androgen production, and rarely,0 T. T K+ b0 ^
an adrenal tumor may also cause adrenal androgen
+ Q. r4 r( I' D5 Z2 h( A! Qexcess.1,3
8 p5 M2 Z8 }' s9 |2 m& p0 ]at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: ?1 B; ^& I3 @( P4 x542 Clinical Pediatrics / Vol. 46, No. 6, July 20070 ^% h c D3 M% {9 K
A unique entity of male-limited gonadotropin-
6 F# a, A* r& M4 l: _* Eindependent precocious puberty, which is also known+ n$ j# U m/ ^( y7 z% y; k
as testotoxicosis, may cause precocious puberty at a
0 ~7 O: b% x0 c* \very young age. The physical findings in these boys+ z0 |% c* g$ q2 C+ G9 K5 M
with this disorder are full pubertal development,
; U/ S; V; A" I. [8 k ^including bilateral testicular growth, similar to boys
$ @) ~+ H5 o w' ~& |8 Wwith CPP. The gonadotropin levels in this disorder
% k! a) ]5 ^/ Rare suppressed to prepubertal levels and do not show) S0 Z) z: i8 O% B$ W# Z( H3 R
pubertal response of gonadotropin after gonadotropin-/ ^: U# B; e% b$ ^% A
releasing hormone stimulation. This is a sex-linked) ^- d- a- E- r% U7 T
autosomal dominant disorder that affects only% w4 V6 M. |, w& T5 w1 D" N" m
males; therefore, other male members of the family( `0 r# A. g+ |3 ~
may have similar precocious puberty.3
9 H. F4 K' o+ ^) e ?5 B6 sIn our patient, physical examination was incon-
% u! T6 H% `7 }3 \; Q1 ]sistent with true precocious puberty since his testi-
1 ]5 i* I5 H9 z! r a% u+ ?cles were prepubertal in size. However, testotoxicosis
/ r' ^9 W3 v: x$ x2 H- lwas in the differential diagnosis because his father9 v3 h( U/ F( M8 @! \: W
started puberty somewhat early, and occasionally,5 ^, F) y1 C* P: w& h
testicular enlargement is not that evident in the
* y( Z- Z" [% S- Pbeginning of this process.1 In the absence of a neg-
8 n* E( |% ?4 Z3 F$ h6 zative initial history of androgen exposure, our
* A* a S/ L9 u2 H4 S+ F* tbiggest concern was virilizing adrenal hyperplasia,5 l8 o" M3 r U( Q1 t+ s
either 21-hydroxylase deficiency or 11-β hydroxylase
) y$ L! _% y6 _6 ~deficiency. Those diagnoses were excluded by find-( s- ?: L( {# r. Y4 T
ing the normal level of adrenal steroids./ V, u: A5 O) s. j
The diagnosis of exogenous androgens was strongly4 {- A8 X$ D( V2 r r
suspected in a follow-up visit after 4 months because
4 T# j1 I! y9 c! a9 othe physical examination revealed the complete disap-6 p3 t! \, Y( e
pearance of pubic hair, normal growth velocity, and7 ]6 Y1 m6 Y! C: I
decreased erections. The father admitted using a testos-# c; d/ P/ u: y+ k
terone gel, which he concealed at first visit. He was
2 i! H4 X. A" z4 _, u z* husing it rather frequently, twice a day. The Physicians’
8 e8 L( c. s& v: n* c9 N+ d7 ^Desk Reference, or package insert of this product, gel or
8 S6 H) @9 V+ x) acream, cautions about dermal testosterone transfer to
1 H3 A& t( @3 o4 B0 ounprotected females through direct skin exposure./ j6 R, }0 t) [4 [( c
Serum testosterone level was found to be 2 times the- ]7 E* k! z8 u0 ?$ p
baseline value in those females who were exposed to" l, j5 i0 K* l7 y. z
even 15 minutes of direct skin contact with their male2 H/ e1 Q9 |( a0 }" w
partners.6 However, when a shirt covered the applica-4 E+ l$ I |: S
tion site, this testosterone transfer was prevented.
5 q C! x2 P3 }5 T3 q/ j' p3 AOur patient’s testosterone level was 60 ng/mL,
" P6 b7 i, k- u) x( g/ kwhich was clearly high. Some studies suggest that0 i: L$ u2 H" O. D/ C
dermal conversion of testosterone to dihydrotestos-
* @0 Y1 y) S5 a3 Lterone, which is a more potent metabolite, is more- x/ y2 O4 [; p5 J2 O; t5 p* m- i
active in young children exposed to testosterone9 A* P1 M. _6 G* V' s/ v
exogenously7; however, we did not measure a dihy-
6 v" E! ]8 E' }& L7 Ddrotestosterone level in our patient. In addition to
6 X- y( }9 {& g7 F) w8 ivirilization, exposure to exogenous testosterone in
$ T* g* `( Z" i* dchildren results in an increase in growth velocity and4 e% b3 ^5 ^ k9 K) Z7 {2 a
advanced bone age, as seen in our patient.
, Q7 j8 d# p: d" Y6 R3 SThe long-term effect of androgen exposure during
- w* Q/ L; k8 U" K' j2 rearly childhood on pubertal development and final
( H; P1 D E1 Wadult height are not fully known and always remain
+ b4 Y* H3 a! m0 xa concern. Children treated with short-term testos-
; c/ ^" T8 _! _# oterone injection or topical androgen may exhibit some! \4 J1 D5 h x: |) U
acceleration of the skeletal maturation; however, after
; ~5 X; P1 a8 ^0 H- Scessation of treatment, the rate of bone maturation* r/ P) D) S3 H7 J
decelerates and gradually returns to normal.8,9
. l/ M ^+ c2 m" }" y$ GThere are conflicting reports and controversy
- V" s3 S7 q6 F! n+ cover the effect of early androgen exposure on adult
9 n* `) C; Q- g9 B7 i. openile length.10,11 Some reports suggest subnormal
3 f U$ s- N+ F* {* I$ J4 dadult penile length, apparently because of downreg-2 B k9 M# _4 T$ i( i# w ?
ulation of androgen receptor number.10,12 However,( K( ?7 d7 r' q0 C7 e
Sutherland et al13 did not find a correlation between
# p* R$ _3 ?0 o* v+ x/ Ichildhood testosterone exposure and reduced adult
/ M. f \- n3 N- n9 ~ Gpenile length in clinical studies.# X# \9 h b/ J# |1 i
Nonetheless, we do not believe our patient is! }# G5 X+ x) e' K
going to experience any of the untoward effects from
B- B4 [: K# Y, y1 h% }testosterone exposure as mentioned earlier because+ M+ {. s: I& W# I7 d# Y
the exposure was not for a prolonged period of time.
9 W0 k7 r, E' J7 n6 GAlthough the bone age was advanced at the time of* ]. |, {0 i+ O& Y$ N; ]
diagnosis, the child had a normal growth velocity at( U: h* o8 y7 K. H! J
the follow-up visit. It is hoped that his final adult8 P8 o: V' g% k, z5 h& a& R
height will not be affected.
/ y- y# u7 p$ N; c8 i1 jAlthough rarely reported, the widespread avail-
! I: j- ?' @: g/ eability of androgen products in our society may
# \/ K4 B$ J% E0 s0 p; G# f6 oindeed cause more virilization in male or female
, Z+ d/ W# L% L* A7 P4 S, s! `# Q- A, ochildren than one would realize. Exposure to andro-
" y' G$ J% T4 i4 R! T) rgen products must be considered and specific ques-! H" c: r, ] E! m
tioning about the use of a testosterone product or9 }) P' V4 h5 _
gel should be asked of the family members during# Z. P4 d) K4 ~/ z
the evaluation of any children who present with vir-
% g0 s0 R; G' h! w+ b. Silization or peripheral precocious puberty. The diag-/ }' c% s* Q8 v) a
nosis can be established by just a few tests and by) y1 f6 J1 q. `( u
appropriate history. The inability to obtain such a' ~% o$ E- x3 M; g! c
history, or failure to ask the specific questions, may9 P0 ^- b) C" {* \: q4 a# {0 ^
result in extensive, unnecessary, and expensive$ j: ^1 C# |3 K
investigation. The primary care physician should be
- B# Y. u6 D* |2 @8 laware of this fact, because most of these children
6 D% i6 s& {, q8 _$ C+ I. `+ M/ `/ kmay initially present in their practice. The Physicians’9 C3 k# b$ F. ]+ I. Q H
Desk Reference and package insert should also put a
# c- y* Y: y$ P6 V" ]warning about the virilizing effect on a male or
' c) d. P7 R) d2 S7 R$ M0 Ffemale child who might come in contact with some-* {7 I( j/ {- w0 |# F2 k
one using any of these products.
3 {4 ?, a( N* i6 ZReferences
. W* j) s+ K/ ]1. Styne DM. The testes: disorder of sexual differentiation7 f3 k7 z8 Y7 e4 ~9 }& K! n. K/ h8 O
and puberty in the male. In: Sperling MA, ed. Pediatric1 ^* k+ p* f8 P* h
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
" j0 m/ X$ z Q- H* y2002: 565-628.5 \, Z/ G v5 E/ Z: T
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious9 V2 i" ?. [5 u( B2 z% Q
puberty in children with tumours of the suprasellar pineal4 f9 k/ E, |3 ~1 r. U) Q' B
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
6 O: A& D" A7 ]2 Q9 QTopical Testosterone Exposure / Bhowmick et al 5434 }# J% s$ h9 o- X7 Y( D
areas: organic central precocious puberty. Acta Paediatr.! ^ k& W, N0 K+ {2 l, Q, }
2001;90:751-756.
" F0 N: X% Y; E' V3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
- x, l' ~4 x, z* xPediatric Endocrinology. 4th ed. New York, NY: Marcel. z j4 B' d, b! ]: g$ i1 D
Dekker Inc; 2003:211-238.: y* G) j7 K' N* x) t$ D
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
0 _, ^2 N/ r0 p6 Y5 ]+ |development in a two-year-old boy induced by topical
3 Z, G ?6 p! n9 T$ Vexposure to testosterone. Pediatrics. 1999;104:e23.5 X. ?8 W% y4 D9 V$ I5 f6 d* |4 `7 P
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
. a( P; V6 L, c5 DSkeletal Development of the Hand and Wrist. 2nd ed.
( t7 n& ^- a! W4 y4 D3 T/ z$ nStanford, CA: Stanford University Press; 1959./ J6 u" C. l5 j6 R7 e. {( A
6. Physicians’ Desk Reference. Androgel 1% testosterone,# M7 y, [9 Y. @; [
Unimed Pharmaceutical Inc. Montvale, NJ: Medical6 F2 q$ L. b$ i- m6 m1 R* e9 R( ^
Economics Company, Inc; 2004:3239-3241.
# e5 W" i1 V( K5 P7. Klugo RC, Cerny JC. Response of micropenis to topical; c1 {/ D. e; }9 p: }5 o
testosterone and gonadotropin. J Urol. 1978;119:$ F- h$ _; F/ G( p! d
667-668.
K K8 x( e- D. \. P) C) k8. Guthrie RD, Smith DW, Graham CB. Testosterone
3 u. H2 }& X6 p1 @& D2 ktreatment for micropenis during early childhood. J Pediatr.
D' k8 i4 o9 O) l T6 A6 K1973;83:247-252.! ^4 S* c. F. z, [
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
' o6 j5 S- ?# A8 q+ ?therapy for penile growth. Urol. 1975;6:708-710.
, ?7 f9 z0 y6 b6 V/ W! c: _; _. \10. Husmann DA, Cain MP. Microphallus: eventual phallic
! `& z. I9 s, zsize is dependent on the timing of androgen administra-$ ~8 A& G0 M" ]" a3 q2 X
tion. J Urol. 1994;152:734-739.6 M9 t0 r5 b$ d2 |. ^' `
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:# ]! \3 W. C* N D
does early treatment with testosterone do more harm
4 b* _5 @& N0 o% `" p' Kthan good? J Urol. 1995;154:825-829.
" L0 E9 g) P) r! N* L8 n, v5 j12. Takane KK, George FW, Wilson JD. Androgen receptor4 I1 I! O/ S; c1 K. a6 A
of rat penis is down-regulated by androgen. Am J Physiol.
0 t3 T! g5 h4 Q9 `1990;258:E46-E50.
* p& q1 u! l6 y- L* g( ^4 N13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect% I. m7 Y- y# f' u
of prepubertal androgen exposure on adult penile- _& U P; j* |: r
length. J Urol. 1996;156:783-787. |
|