- 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. Central4 g! u# J! V+ L( N( E
precocious puberty (CPP), which is mediated s" g/ ^* ^. D! C7 P% @9 W5 w
through the hypothalamic pituitary gonadal axis, has
; g' ~8 `7 P* La higher incidence of organic central nervous system
+ [, t; C3 G$ ^( k0 i5 Vlesions in boys.1,2 Virilization in boys, as manifested
$ _" x, {$ D1 w eby enlargement of the penis, development of pubic! P$ |/ a1 ^$ g% j
hair, and facial acne without enlargement of testi-9 w$ r0 l% s7 l) [7 x, V
cles, suggests peripheral or pseudopuberty.1-3 We
" U- E+ S' W3 dreport a 16-month-old boy who presented with the
! O( g/ r l* z! penlargement of the phallus and pubic hair develop-
" a3 A; j \+ f' _7 n2 gment without testicular enlargement, which was due
) y6 G+ P) i5 n9 T' Cto the unintentional exposure to androgen gel used by
* t/ Z. r, J9 Cthe father. The family initially concealed this infor-; U9 m- Y1 F% p0 H8 b) ^4 c9 f' p1 P9 w
mation, resulting in an extensive work-up for this
" f' T* H" ~2 ^5 E# M7 P L; ?! achild. Given the widespread and easy availability of
4 i+ n% y9 @8 ytestosterone gel and cream, we believe this is proba- {$ r( f% q" F* T8 W# ^ z. V! X
bly more common than the rare case report in the! M2 T' p* J+ F# |. s. P7 q9 C0 x; X
literature.4
1 A( N; m1 d5 j9 [* q2 S2 R) F$ L# |Patient Report1 ^: P0 V" w/ r' Z
A 16-month-old white child was referred to the
( C$ K* m: c# i, x& {% c: b4 jendocrine clinic by his pediatrician with the concern
+ \/ y, C: m" Yof early sexual development. His mother noticed( \% N4 j" }6 i6 m1 C# i
light colored pubic hair development when he was
% ~3 c" N# q T8 T- u5 i) DFrom the 1Division of Pediatric Endocrinology, 2University of; a8 W. S& [- d l! `/ x6 n! B3 q9 k
South Alabama Medical Center, Mobile, Alabama.
P) W- u. I* f: KAddress correspondence to: Samar K. Bhowmick, MD, FACE,* J& u* S% B: {
Professor of Pediatrics, University of South Alabama, College of9 ]0 e% f% K/ H' h
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( L* ~6 C" W9 t! q# c
e-mail: [email protected].
+ f+ F3 w; f6 ^4 rabout 6 to 7 months old, which progressively became
9 X% V; p8 Q5 W# p% z/ Z9 p6 Ldarker. She was also concerned about the enlarge-4 g3 z3 M, x. M/ e
ment of his penis and frequent erections. The child5 M- s* P$ S6 {: K/ b5 x8 a
was the product of a full-term normal delivery, with
3 X* ]5 X/ t# ^% Y5 Pa birth weight of 7 lb 14 oz, and birth length of
! H8 m5 h5 l/ s3 H, y. v20 inches. He was breast-fed throughout the first year
' N: v! r" w! x, w) Qof life and was still receiving breast milk along with
; K' H$ d- L3 |/ u0 osolid food. He had no hospitalizations or surgery,
& c( w# S9 w8 m6 Q4 c3 nand his psychosocial and psychomotor development3 W' z& {) a4 _* _* o+ q
was age appropriate.4 p N4 P) E. d& N& V$ U& R
The family history was remarkable for the father,4 x. C" n" V5 \) w% o
who was diagnosed with hypothyroidism at age 16,
- j" C5 F5 e0 P, p( Cwhich was treated with thyroxine. The father’s
. e. P& C3 i% X- q1 Rheight was 6 feet, and he went through a somewhat
( m6 N% d% Y* E) Fearly puberty and had stopped growing by age 14.
2 e; U4 |, K+ p, u2 v rThe father denied taking any other medication. The8 z) g8 [* \/ k8 `7 [
child’s mother was in good health. Her menarche
1 K. q2 E; q1 |+ d; I' _was at 11 years of age, and her height was at 5 feet$ o' v2 H" W: N8 {! ?# K
5 inches. There was no other family history of pre-- m# w+ I( {! w( }7 V1 o, N
cocious sexual development in the first-degree rela-
( N7 N# g) E j! k9 ~4 h- j) I+ @+ utives. There were no siblings.8 k1 e1 c" U7 d
Physical Examination1 @% `! B4 N4 Y- i" }4 m
The physical examination revealed a very active,9 i9 j' R% A& S+ _) S9 ] N
playful, and healthy boy. The vital signs documented
# B7 v( G: H# ^( aa blood pressure of 85/50 mm Hg, his length was) F6 `- ~3 N* N
90 cm (>97th percentile), and his weight was 14.4 kg, r6 T d1 }0 A+ o) l1 X
(also >97th percentile). The observed yearly growth
7 x; W) \7 @% N% t: Nvelocity was 30 cm (12 inches). The examination of
: \& D7 K" z: E" U$ ?" Z a. G1 Xthe neck revealed no thyroid enlargement.: {7 Q/ l7 f3 t& [8 {1 z
The genitourinary examination was remarkable for
- y3 ^4 N% ?$ U% ]+ c- }& menlargement of the penis, with a stretched length of& [& Q; U0 n; Q8 ]! t
8 cm and a width of 2 cm. The glans penis was very well
$ \8 T( t0 H# E* j1 L* m9 ?8 ]developed. The pubic hair was Tanner II, mostly around6 X$ c0 Q/ F% r- [$ j0 r6 s
540! M6 i% V& E: Q+ ~) V3 c8 c
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, a7 @ @7 u4 m% q3 y h
the base of the phallus and was dark and curled. The* H+ d, N. Y8 B- E$ W
testicular volume was prepubertal at 2 mL each.7 T( P+ T) @3 [& c$ ]% I1 J8 a' c
The skin was moist and smooth and somewhat$ d/ q; i. g" n" G) T" T" b% S
oily. No axillary hair was noted. There were no
- r t& F3 u4 dabnormal skin pigmentations or café-au-lait spots.. w! }$ L& _3 @( u& U8 I9 v' S$ }
Neurologic evaluation showed deep tendon reflex 2+# H3 A( x- Z: c
bilateral and symmetrical. There was no suggestion
* n/ [! e" q0 t4 u+ Xof papilledema.
( |3 d" [1 g G. F4 |Laboratory Evaluation* w) z* ?5 g7 N
The bone age was consistent with 28 months by1 D! n/ z) w# d, q8 x" F9 {
using the standard of Greulich and Pyle at a chrono-; S0 g5 i: ~/ D9 T+ U
logic age of 16 months (advanced).5 Chromosomal
+ z8 \6 B- j2 C) ~& V4 xkaryotype was 46XY. The thyroid function test& I' e& @+ L( `
showed a free T4 of 1.69 ng/dL, and thyroid stimu-( ?/ T2 {# i& p+ p
lating hormone level was 1.3 µIU/mL (both normal).& L% t1 k& u: j( S- t
The concentrations of serum electrolytes, blood" z. _5 r6 v. c
urea nitrogen, creatinine, and calcium all were, G' M0 f, O. C8 z; e
within normal range for his age. The concentration- z5 s: c+ `8 _7 M& u
of serum 17-hydroxyprogesterone was 16 ng/dL( P: o" Q9 ]9 T8 z
(normal, 3 to 90 ng/dL), androstenedione was 20
8 Q0 V6 X% ^- _$ ing/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
5 E" C; P4 {7 C9 F! o9 B9 }! \, [" V5 Pterone was 38 ng/dL (normal, 50 to 760 ng/dL),
3 A. Y n8 ^ f: W% H/ Udesoxycorticosterone was 4.3 ng/dL (normal, 7 to
; n) H% A0 j2 Q9 H49ng/dL), 11-desoxycortisol (specific compound S)- A" n3 R* M& }/ R2 Z
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
3 M2 u( p; R7 s: R" s6 w6 Ktisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total8 n% @5 z/ J- j, \$ e
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
* y6 U- T0 L4 B, l% l0 D! gand β-human chorionic gonadotropin was less than
6 z* L& r% i: W5 mIU/mL (normal <5 mIU/mL). Serum follicular
# w2 j3 h7 m: h0 `stimulating hormone and leuteinizing hormone
6 g( T2 F: ?; O" J& g1 uconcentrations were less than 0.05 mIU/mL9 q2 F+ G6 p( ]) T
(prepubertal).( s# s/ |. D: a) y
The parents were notified about the laboratory
, i: T3 \6 c/ i2 T' qresults and were informed that all of the tests were
* R3 Q0 `% W3 ~; c' Ynormal except the testosterone level was high. The
- s9 E$ u% M. p0 U. i6 A) Efollow-up visit was arranged within a few weeks to
# U4 Y5 ^1 G2 v! F. |4 m3 c7 i5 zobtain testicular and abdominal sonograms; how-
5 t# e8 T2 c% O+ @) |0 G0 _+ rever, the family did not return for 4 months.
3 f/ Y: B1 l7 LPhysical examination at this time revealed that the
$ i1 D& m" t/ p m0 y+ Echild had grown 2.5 cm in 4 months and had gained
8 T9 E+ n' R% J J2 kg of weight. Physical examination remained
u' F6 C" M7 \% b- n- X$ W. p" Runchanged. Surprisingly, the pubic hair almost com-4 y6 D( U4 }# m7 M/ [) x8 h7 L
pletely disappeared except for a few vellous hairs at q) h9 R" H1 |; s) E5 c r; d
the base of the phallus. Testicular volume was still 2
+ y9 o8 b( \. W' lmL, and the size of the penis remained unchanged.) K- _, G2 [8 A. a& y4 O4 T6 \
The mother also said that the boy was no longer hav-
( D& q1 s& W' i. Q- a! d& I* zing frequent erections.1 C- S' W, q% s. [2 l, v9 A
Both parents were again questioned about use of- P+ n" B" K k9 m5 H. {
any ointment/creams that they may have applied to
# o' K6 x; b1 ] z! B( lthe child’s skin. This time the father admitted the7 t( { G- Y7 U
Topical Testosterone Exposure / Bhowmick et al 541
1 }0 F5 d. G- Ruse of testosterone gel twice daily that he was apply-9 m6 M) k( F5 A! ]4 q5 N
ing over his own shoulders, chest, and back area for
5 \6 x. r/ V- @1 }; j- Da year. The father also revealed he was embarrassed
: M3 T! \8 i2 ]5 |! A, }to disclose that he was using a testosterone gel pre-
1 e1 R, E+ F8 ^' |scribed by his family physician for decreased libido1 E2 c+ p# B2 K1 c
secondary to depression.
0 l# I+ o, J9 LThe child slept in the same bed with parents.3 R* O6 v; V# _5 E1 t
The father would hug the baby and hold him on his2 e2 d* |' D1 ^, S
chest for a considerable period of time, causing sig-# h% z* N8 x b$ @) H
nificant bare skin contact between baby and father.. ?" v o$ }! h# o
The father also admitted that after the phone call,2 |- i. u: r# R1 T S& {
when he learned the testosterone level in the baby
0 F* {6 J/ T( b* A7 A p) hwas high, he then read the product information( V% S3 |7 X6 O( F9 m" L ^
packet and concluded that it was most likely the rea-
# r' F5 H, ~! \& K( i. b' Yson for the child’s virilization. At that time, they' n5 `" z6 f' |* J
decided to put the baby in a separate bed, and the) o! ]. U& W, c
father was not hugging him with bare skin and had; Y( s- |% `" q$ M0 i7 X
been using protective clothing. A repeat testosterone# O& R% I" {; l5 [
test was ordered, but the family did not go to the' |" J3 z( a# ]" T) O2 |
laboratory to obtain the test.
! c1 [% D) d( j& NDiscussion3 j5 h* B! S; ?7 S
Precocious puberty in boys is defined as secondary
& c7 Y" f1 k' D% D/ s4 tsexual development before 9 years of age.1,4
6 P' D6 a$ J0 z5 P j8 C6 J+ M" ^Precocious puberty is termed as central (true) when
. \2 }9 U5 S2 Z0 ait is caused by the premature activation of hypo-
! _! x+ I2 E0 [+ j6 w$ |thalamic pituitary gonadal axis. CPP is more com-; ~! c9 q+ m' ^: ~1 u0 q/ f2 p) D$ |
mon in girls than in boys.1,3 Most boys with CPP
6 i% g2 d( t/ T2 |! ]; Vmay have a central nervous system lesion that is0 V2 n5 k# F* s( l) t1 x- o. ^
responsible for the early activation of the hypothal-
( {' H' H) c) _* Kamic pituitary gonadal axis.1-3 Thus, greater empha- v+ o9 _3 C6 E! G
sis has been given to neuroradiologic imaging in
7 X T" ]" v: d; f6 @' zboys with precocious puberty. In addition to viril-; D( M5 @3 G' N! Z! [4 {1 \% ^
ization, the clinical hallmark of CPP is the symmet-
) E5 |$ m2 Q* ? J% `# lrical testicular growth secondary to stimulation by6 x( y; }& ^0 w$ L6 L- g$ V
gonadotropins.1,39 [- x% d& Z" f, R" X' G I( J" N
Gonadotropin-independent peripheral preco-) e' }! Y( \4 t) e' D/ P' c
cious puberty in boys also results from inappropriate
0 j% X" p2 h# H: C( W. x$ v6 ^androgenic stimulation from either endogenous or
; X0 O5 `! A1 b' K _; M/ |/ ~1 v0 Kexogenous sources, nonpituitary gonadotropin stim-
( D1 ?1 t$ Y0 u# Sulation, and rare activating mutations.3 Virilizing
& Y% o; x' C, ~1 F/ c' S* K# Lcongenital adrenal hyperplasia producing excessive9 n3 o6 J( n3 x* C' v. |
adrenal androgens is a common cause of precocious
0 S9 ^$ }7 e, ]. d/ E" ^# [ y. hpuberty in boys.3,4" _, q U' V' b
The most common form of congenital adrenal
- l7 O& H0 \) w8 ]; Thyperplasia is the 21-hydroxylase enzyme deficiency.
8 m, x8 z/ Q6 l( o3 Z$ f/ \The 11-β hydroxylase deficiency may also result in
$ b# y4 E+ U* L6 @) aexcessive adrenal androgen production, and rarely,
8 T- @: K5 c* jan adrenal tumor may also cause adrenal androgen* B0 N8 u9 l. y* D# o
excess.1,3* ~3 }9 F+ D6 J2 d4 _! P, E6 _
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from5 N. F2 {7 W0 \. Z- H8 v! l
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
6 o$ T( F) P' ?) F& ]( eA unique entity of male-limited gonadotropin-
+ _% c" |0 u: g! kindependent precocious puberty, which is also known
6 i% x+ c" s: a4 P. S) T4 eas testotoxicosis, may cause precocious puberty at a9 @/ E: ]' X1 L, V3 H+ _, \
very young age. The physical findings in these boys+ D" b8 l9 c% s& @9 W
with this disorder are full pubertal development,5 O: [- e* F: s9 v8 X9 u, {3 t
including bilateral testicular growth, similar to boys
. @- j# `& P+ Y- V9 @) Gwith CPP. The gonadotropin levels in this disorder9 J/ `1 {( J, {
are suppressed to prepubertal levels and do not show
% [: o! I a$ z% W4 q4 Apubertal response of gonadotropin after gonadotropin-
- }. _2 O' t6 x( Q# M1 P0 ~/ sreleasing hormone stimulation. This is a sex-linked- Q% U: `9 v# i5 a7 E
autosomal dominant disorder that affects only8 j5 e5 U9 g+ \" x: T4 o
males; therefore, other male members of the family
* F8 k. F1 [! Y! Q( q0 h emay have similar precocious puberty.3
i5 K% `, q5 w2 ?$ |In our patient, physical examination was incon-! g: J5 R d# B8 M0 r, m
sistent with true precocious puberty since his testi-
, T; R4 r' `; }5 f' ~4 e4 I; Bcles were prepubertal in size. However, testotoxicosis6 F$ W e7 [) w) ^ [3 i
was in the differential diagnosis because his father/ U/ I5 `; g" b# s
started puberty somewhat early, and occasionally,) i( o. X! b4 L
testicular enlargement is not that evident in the
; [* _3 f3 f3 s; Z; i* m3 Kbeginning of this process.1 In the absence of a neg-3 k; Z' e0 |& t, F4 _+ q* c% [0 w
ative initial history of androgen exposure, our
9 F2 i: E# p4 x" Z/ R+ ebiggest concern was virilizing adrenal hyperplasia,
. { Y2 A/ ^ g4 s3 q! g* ?# Aeither 21-hydroxylase deficiency or 11-β hydroxylase
) a, m6 o( k2 m0 g: ?4 ]5 Odeficiency. Those diagnoses were excluded by find-
; X8 [; ^' f/ O/ z' K$ o: t# Ving the normal level of adrenal steroids.* X; m4 @* h" S" h. J# `
The diagnosis of exogenous androgens was strongly
9 ?0 a+ K; V$ x. y; j0 K+ J) rsuspected in a follow-up visit after 4 months because
' z* |0 a: J8 V( Jthe physical examination revealed the complete disap-
. z/ k+ X- Y. M, N$ X) C( y, {pearance of pubic hair, normal growth velocity, and; H: f- W% }# a
decreased erections. The father admitted using a testos-
7 l4 O% J$ o1 M4 }$ o2 [8 Bterone gel, which he concealed at first visit. He was9 t4 m1 \% _( j8 G& C( J* [
using it rather frequently, twice a day. The Physicians’
" a2 o5 R5 Z3 F ~. ]' v: ZDesk Reference, or package insert of this product, gel or1 K( [. S" d& ~' W7 e
cream, cautions about dermal testosterone transfer to
+ y( k- V: S; R, e# M) runprotected females through direct skin exposure. l" a: \1 ^5 x! g0 x
Serum testosterone level was found to be 2 times the& ?0 I' {1 r1 [) d, `7 W
baseline value in those females who were exposed to" y% F2 r- \6 f* i( r9 n7 y/ h
even 15 minutes of direct skin contact with their male x `) g6 F$ _( T8 X7 x
partners.6 However, when a shirt covered the applica-
, U+ v- i1 P; V( _$ ~tion site, this testosterone transfer was prevented.
7 \' B! v9 i4 O4 m3 x0 k5 @Our patient’s testosterone level was 60 ng/mL,% U$ ?! e: ^7 d, e% P
which was clearly high. Some studies suggest that
5 D6 S% m/ c5 g+ X4 I. Pdermal conversion of testosterone to dihydrotestos-
; k) T( F8 L! u1 D5 oterone, which is a more potent metabolite, is more- A& s d A/ f( Q* G5 b! o$ h
active in young children exposed to testosterone
+ e {9 J0 T3 b, b2 w8 Dexogenously7; however, we did not measure a dihy-9 _6 y" ~: I( E3 c/ W# q
drotestosterone level in our patient. In addition to' j/ i7 Q( b. D% l6 ]* r% f
virilization, exposure to exogenous testosterone in5 w) Z1 Q6 i2 F
children results in an increase in growth velocity and
/ R# r$ X! J8 jadvanced bone age, as seen in our patient.
: }4 ]- {+ ~5 X, `; QThe long-term effect of androgen exposure during
. |- A* R' T& d: p# `# ?early childhood on pubertal development and final
$ x# C5 f8 \7 V. m$ g' Fadult height are not fully known and always remain( }1 b6 t, c# A" E' R2 b9 j
a concern. Children treated with short-term testos-2 B* T( a/ y! S" W
terone injection or topical androgen may exhibit some8 W$ H$ F/ c3 t1 Z9 p
acceleration of the skeletal maturation; however, after1 S* K% k- {# k" U. |) m) |
cessation of treatment, the rate of bone maturation
8 i* V9 h$ f, z/ n- G! g# r0 Zdecelerates and gradually returns to normal.8,9
! m9 A+ @5 p9 V/ P" }There are conflicting reports and controversy# j2 H$ A0 J7 N. f0 K
over the effect of early androgen exposure on adult4 t( M% l9 l- \' a' ?
penile length.10,11 Some reports suggest subnormal
" r2 S+ h6 z" q) J7 Wadult penile length, apparently because of downreg-
- G$ X! H9 l) O7 Kulation of androgen receptor number.10,12 However,3 s9 z) e/ n0 W
Sutherland et al13 did not find a correlation between+ a8 Q/ _" Y3 L' | `" I. H% J+ B$ M
childhood testosterone exposure and reduced adult& ^0 S9 {6 f/ a6 e/ H- h
penile length in clinical studies.
3 B. p6 g+ \3 y& k+ JNonetheless, we do not believe our patient is, ]( g6 X+ z+ E, R3 C( h$ J; x
going to experience any of the untoward effects from" M0 i( U3 p: R7 A y2 F
testosterone exposure as mentioned earlier because# i9 Y. f/ }, }+ u
the exposure was not for a prolonged period of time.
- Q; ^- ^' J4 o* \5 t8 RAlthough the bone age was advanced at the time of" d8 [* r: p) B4 a4 T
diagnosis, the child had a normal growth velocity at+ t4 M5 h B. O& w/ K
the follow-up visit. It is hoped that his final adult: X% Z1 l% @/ E5 z$ K0 u- G5 a
height will not be affected.5 A$ D E, ~0 H, a8 G' U9 D
Although rarely reported, the widespread avail-
$ x3 f6 i( u+ G1 Kability of androgen products in our society may' d9 p C( }3 ~& V2 p; A
indeed cause more virilization in male or female4 D8 m, ~5 c' l$ J
children than one would realize. Exposure to andro-% A( E* w: |" w! |! B% s
gen products must be considered and specific ques-0 W, @9 X4 H2 F6 l. F
tioning about the use of a testosterone product or
3 M* F9 T5 g# \. s+ }3 r- Cgel should be asked of the family members during
5 S: @& z" N$ U& w/ h; d/ wthe evaluation of any children who present with vir-
, h4 P( l' g9 |2 I0 Q1 Z4 oilization or peripheral precocious puberty. The diag-
! z: X" J+ r W; j4 G9 n$ Pnosis can be established by just a few tests and by
9 C' @8 ^: h9 a$ Uappropriate history. The inability to obtain such a- N n/ i' @& J, g( }3 e
history, or failure to ask the specific questions, may# Y" G- [; g, E. G7 k( o
result in extensive, unnecessary, and expensive
+ s% V; A6 F8 z3 E9 Iinvestigation. The primary care physician should be
7 S: J0 R6 _- _) |$ _aware of this fact, because most of these children: `7 e& T1 a! B# j2 V2 H7 }1 W' ~
may initially present in their practice. The Physicians’4 F8 |7 ]+ @) I8 V
Desk Reference and package insert should also put a
8 {5 T9 F5 }# ?; G5 ^$ Q" a- wwarning about the virilizing effect on a male or4 s4 W o J& {8 F, ]; Y
female child who might come in contact with some-/ C; x. d8 ~" z+ E3 |" }' D
one using any of these products.5 o4 R% q$ s- {' g
References6 m: k& m/ ^7 C @
1. Styne DM. The testes: disorder of sexual differentiation
+ n$ Y7 \. Z* s2 v$ aand puberty in the male. In: Sperling MA, ed. Pediatric8 ~% t2 a9 [8 F. M( ?9 N$ z
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;' ?% w+ P8 i( f! @
2002: 565-628.
* q6 k7 _) g7 I0 [4 b1 O& c2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious( {9 d5 n& Y6 U9 q+ b
puberty in children with tumours of the suprasellar pineal
2 g3 L; D9 Z# J1 _at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 ^5 j; O% ]" {( u2 K0 R) H1 o
Topical Testosterone Exposure / Bhowmick et al 543
' q7 A i4 L# }$ rareas: organic central precocious puberty. Acta Paediatr.$ k- a) G6 u9 [; N
2001;90:751-756.% H3 B: o% j' Z& V: {0 }$ \
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
' O, }+ r$ X- @9 e& w' B5 @3 kPediatric Endocrinology. 4th ed. New York, NY: Marcel
& z4 l* F* C3 m5 O# }Dekker Inc; 2003:211-238.
% c* M2 H& O3 I: n6 z* L5 j: A) @* T" Q4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
: W" v0 _& m; \0 ?5 W( Rdevelopment in a two-year-old boy induced by topical* u4 e O3 J0 R7 K! C
exposure to testosterone. Pediatrics. 1999;104:e23.
* e6 C/ q! n F/ n5 [: t5. Greulich WW, Pyle SI, eds. Radiographic Atlas of# W7 ?5 s) K2 N% ~/ i
Skeletal Development of the Hand and Wrist. 2nd ed.5 ^% ^3 n) l. q- `; t; u$ a
Stanford, CA: Stanford University Press; 1959.
- a" F1 F9 K' I% A) [5 @ L' Q6. Physicians’ Desk Reference. Androgel 1% testosterone,- ^$ w0 g0 K4 O+ @& N; O
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
. @- |8 w" N! P+ V6 `Economics Company, Inc; 2004:3239-3241.5 S* [9 ^ Q: k# G% U
7. Klugo RC, Cerny JC. Response of micropenis to topical9 i9 p6 A2 D& l7 N
testosterone and gonadotropin. J Urol. 1978;119:; _7 V8 `+ l) z/ q
667-668.
; j. w7 _. d! V! g8. Guthrie RD, Smith DW, Graham CB. Testosterone7 b' U: ~) [0 S7 `
treatment for micropenis during early childhood. J Pediatr.
; s! N' A' C, E/ n1973;83:247-252.
( Z8 X5 _( i( ]9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone& d7 G$ K* Z( x# M
therapy for penile growth. Urol. 1975;6:708-710.1 G, k) ]& T" k+ g) g
10. Husmann DA, Cain MP. Microphallus: eventual phallic B* J+ g* J t3 X
size is dependent on the timing of androgen administra-$ _# x2 f2 P X r' w: S
tion. J Urol. 1994;152:734-739.8 D! O9 i# b; h
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:3 e, m6 y) o4 t: A! C* Q! v! H) i& D
does early treatment with testosterone do more harm! B/ c% I# E) q9 @0 q
than good? J Urol. 1995;154:825-829.
- j2 i3 D) L) n$ y4 s# y* m( m12. Takane KK, George FW, Wilson JD. Androgen receptor1 U, s- b3 r+ i9 ^; @6 G
of rat penis is down-regulated by androgen. Am J Physiol.
' i1 t1 l& u3 ?( \8 |2 i3 l1990;258:E46-E50.
- u- i: N0 R% Y/ Y# `# K. C6 Z1 q13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
: T/ f" e- ~! \# B" d3 Gof prepubertal androgen exposure on adult penile
, M* Z# p( f3 g% f. wlength. J Urol. 1996;156:783-787. |
|