- 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
& o/ J0 I+ v d# W8 Eprecocious puberty (CPP), which is mediated( b3 m- m8 i6 k0 X$ x
through the hypothalamic pituitary gonadal axis, has8 N9 O0 M- e; G- H1 {
a higher incidence of organic central nervous system
5 t8 O5 A) K3 b3 @! Nlesions in boys.1,2 Virilization in boys, as manifested/ V; a: t1 L% \* u
by enlargement of the penis, development of pubic
9 }! Z( \* {/ S- C% y& Nhair, and facial acne without enlargement of testi-
{4 M% j9 q2 g) ^) Y# J [+ tcles, suggests peripheral or pseudopuberty.1-3 We/ O8 f8 O1 f6 y3 e4 m
report a 16-month-old boy who presented with the
: ~) Q& Y. i; B9 N' m$ Senlargement of the phallus and pubic hair develop-" }% ]* H1 a2 G; S' P" h
ment without testicular enlargement, which was due
5 R% S8 _9 L' J Q: Ato the unintentional exposure to androgen gel used by
% ]1 @- t' H [7 C8 @the father. The family initially concealed this infor-0 O5 {' t8 R; {/ h+ L: A
mation, resulting in an extensive work-up for this/ b1 y1 B+ V# c7 i
child. Given the widespread and easy availability of' H9 X0 K3 l+ r) U+ w% o# s
testosterone gel and cream, we believe this is proba-
, ?: f7 S" w* C2 V% L7 J. ybly more common than the rare case report in the
* }6 h, u3 l9 e; h6 G, bliterature.4
. ~( _% l' k9 }& [* aPatient Report
1 N2 W9 H9 I# x6 ^$ EA 16-month-old white child was referred to the$ |7 C" n. H1 v7 f- f8 A- q: c
endocrine clinic by his pediatrician with the concern( n/ W% k6 A0 z. i
of early sexual development. His mother noticed% b4 y8 [1 p& r7 O$ `6 r
light colored pubic hair development when he was( c% E* ]1 x+ V+ C4 V
From the 1Division of Pediatric Endocrinology, 2University of
; Y$ I: H. M( y: y5 `) Y5 M. vSouth Alabama Medical Center, Mobile, Alabama.
1 d5 o9 @: Z5 j5 ?Address correspondence to: Samar K. Bhowmick, MD, FACE,
5 O; R% p- O3 AProfessor of Pediatrics, University of South Alabama, College of
) D2 L$ l" S% H2 D% O4 ]Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
* }, ]* @- K* oe-mail: [email protected].
+ i+ S1 @+ o3 Cabout 6 to 7 months old, which progressively became
/ w+ j' R H" T( Q4 Jdarker. She was also concerned about the enlarge-& z; l: J& c3 Y0 q( V; w) l
ment of his penis and frequent erections. The child0 a. [; P3 r* I; N1 _
was the product of a full-term normal delivery, with
" ~" d. n1 y% S1 V1 O) ?1 y Ka birth weight of 7 lb 14 oz, and birth length of
& E; [2 h% H4 T' g8 T Q& w: ]20 inches. He was breast-fed throughout the first year
6 a/ ?; F$ V% b2 D- ~8 T: eof life and was still receiving breast milk along with; C% b. ^3 V9 w* o3 d. O5 l/ y; O
solid food. He had no hospitalizations or surgery,; @1 x) t6 i: i S9 c
and his psychosocial and psychomotor development
" W- U' K1 k( r( Iwas age appropriate.! l- x( p' k3 n
The family history was remarkable for the father,
4 V$ W/ Z( ^7 A' s, ewho was diagnosed with hypothyroidism at age 16,
8 Y8 b( N+ e9 i' V" T1 v uwhich was treated with thyroxine. The father’s+ D) `- T; w1 t; j3 n" U. f* L( ~
height was 6 feet, and he went through a somewhat: p+ M4 w* v6 S
early puberty and had stopped growing by age 14.# K6 h, J ~# }8 d3 o& }1 C
The father denied taking any other medication. The# L3 k; f5 T2 A
child’s mother was in good health. Her menarche
" E$ ?: u2 H/ f1 I' r+ F0 gwas at 11 years of age, and her height was at 5 feet
4 p* f3 \9 O( s; o, d5 inches. There was no other family history of pre-
; k6 f6 T2 G8 h. ]cocious sexual development in the first-degree rela-
9 p; P* {; c9 J+ b9 o& W+ ltives. There were no siblings.. g9 N; h3 V( l+ \3 s: d5 `
Physical Examination& N/ a, a7 p! v- @' a3 W
The physical examination revealed a very active,; J0 \! Q" y; u* t& g$ B
playful, and healthy boy. The vital signs documented$ Z- x3 U, i; d! t( i
a blood pressure of 85/50 mm Hg, his length was* W. a9 y) G. g8 x
90 cm (>97th percentile), and his weight was 14.4 kg# t9 S! N! M& h1 R$ o5 ?
(also >97th percentile). The observed yearly growth) S; c$ N: Y* _& k' s& X
velocity was 30 cm (12 inches). The examination of6 _9 `& `% r/ n9 V6 C; L
the neck revealed no thyroid enlargement.& \) c* [; e+ A* n6 W
The genitourinary examination was remarkable for
5 e( K1 s9 {' n4 menlargement of the penis, with a stretched length of1 F# c( x. }) N
8 cm and a width of 2 cm. The glans penis was very well
- K* Z1 F7 y Y# K9 n, z4 vdeveloped. The pubic hair was Tanner II, mostly around
2 A: l$ i: X# H5401 a: |* k4 j* _( L* n
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 l8 h, k) i5 i7 a: h0 ?
the base of the phallus and was dark and curled. The! O1 v* d6 h6 w1 ~
testicular volume was prepubertal at 2 mL each.
9 x( L- B3 ?( _The skin was moist and smooth and somewhat4 R$ c/ I1 c7 _9 N7 a3 V( N
oily. No axillary hair was noted. There were no
: G F3 f# X. t% Q# i5 \abnormal skin pigmentations or café-au-lait spots.; U! r; p9 T: N& J
Neurologic evaluation showed deep tendon reflex 2+
! L7 e& p3 f! [. W4 N# K: p% Mbilateral and symmetrical. There was no suggestion
- B& r+ R2 V2 i0 g" @. o. @' }4 Mof papilledema.
( R: T1 ?! Z: B4 z" i, ULaboratory Evaluation3 W8 x" L5 H6 y7 f; Q- f0 w/ t) e
The bone age was consistent with 28 months by
3 [5 p6 g7 r3 Y U# O- W; g1 Ousing the standard of Greulich and Pyle at a chrono-
: D+ z( N% T) Jlogic age of 16 months (advanced).5 Chromosomal
4 R+ ^: L; l% y$ q6 k+ ~5 d$ j5 V2 Ikaryotype was 46XY. The thyroid function test
- l6 a. {/ u+ K T' Z$ | R2 t( pshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
8 Z1 j* |% u* O8 ]+ ylating hormone level was 1.3 µIU/mL (both normal).
: \" y3 Q4 i8 e8 a" u hThe concentrations of serum electrolytes, blood# V `0 D) p( T2 Y
urea nitrogen, creatinine, and calcium all were( L0 ?" a, ^7 [
within normal range for his age. The concentration! ~4 f9 s! B% l3 k9 \& b' |
of serum 17-hydroxyprogesterone was 16 ng/dL
/ E) |1 G+ I) f- \(normal, 3 to 90 ng/dL), androstenedione was 20" ]( P& w& l }# c% `, t' Z
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-5 q& O3 J! a5 ?/ f
terone was 38 ng/dL (normal, 50 to 760 ng/dL),* p) j4 R6 P$ g8 V
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
# s1 [* Y$ J4 }; t7 B49ng/dL), 11-desoxycortisol (specific compound S)4 P% y- @6 g8 o) |; K }; B4 ?% l5 j
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
; y$ Q8 V2 i( N; A4 T7 R& gtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total i8 {3 {! G( u! K0 u
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),1 |* c! ^* `, v* _, @. _1 d( D
and β-human chorionic gonadotropin was less than
& p2 s# C5 x* ?7 E( d5 mIU/mL (normal <5 mIU/mL). Serum follicular
; u* A' k9 m0 O7 V Z8 ~/ ^2 S& dstimulating hormone and leuteinizing hormone
, ^1 T5 S1 p7 A9 ^concentrations were less than 0.05 mIU/mL; f- T$ Y- T0 D& i2 [3 s/ V
(prepubertal).
- D, ~2 K9 Z, t- R0 _The parents were notified about the laboratory
6 Q# d0 m- h$ F: @" U0 gresults and were informed that all of the tests were5 R% i+ D( G, `" p
normal except the testosterone level was high. The
% o2 f) _; B! w; e, ]follow-up visit was arranged within a few weeks to% p1 `+ |- s3 z8 i: @; f
obtain testicular and abdominal sonograms; how-( N5 v- J! A# u6 I# M1 q( b
ever, the family did not return for 4 months.
3 y P: B$ ^. F" GPhysical examination at this time revealed that the
; `! `0 Z% F1 t' hchild had grown 2.5 cm in 4 months and had gained
8 d& {; ~: a1 A' B2 M E; g& d+ Y2 kg of weight. Physical examination remained# p0 T: V- v; H7 Q7 n7 A* z
unchanged. Surprisingly, the pubic hair almost com-
0 \ L1 j( m3 s3 Z. lpletely disappeared except for a few vellous hairs at
4 o9 p/ X& [) L6 \ b, vthe base of the phallus. Testicular volume was still 2
4 W( T! }; }; _6 b2 f8 E4 UmL, and the size of the penis remained unchanged.2 V8 i" m2 N6 Q) u! M& C
The mother also said that the boy was no longer hav-
# X# t; O- G) W M; H/ B5 k% Ving frequent erections.
, `7 d1 e" N2 f' o. D- Q6 LBoth parents were again questioned about use of8 P4 G. ~9 X T9 j
any ointment/creams that they may have applied to
" B# {' y( J- O) E6 Sthe child’s skin. This time the father admitted the0 K4 J$ _" S. R" N. X
Topical Testosterone Exposure / Bhowmick et al 541
2 `7 i6 R# g! o# W' L' ause of testosterone gel twice daily that he was apply-7 t! i: U: L" [" ~7 g5 d& a0 K
ing over his own shoulders, chest, and back area for- h& A: R! s- ]
a year. The father also revealed he was embarrassed
d# {+ {5 z7 W4 g) lto disclose that he was using a testosterone gel pre-
9 `. c/ S5 H1 ^' q2 s9 T0 j% Sscribed by his family physician for decreased libido
! m3 e6 r4 v$ g' bsecondary to depression./ T- s# e# P" H, S& e# u4 X
The child slept in the same bed with parents.
$ d# X) A9 i# V* i+ R9 KThe father would hug the baby and hold him on his4 }/ h" z r" b9 j9 c7 k3 Z5 N
chest for a considerable period of time, causing sig-$ w( A7 L$ ~: B. E! @
nificant bare skin contact between baby and father.# c J- M& y' G$ q% d) _1 p- w
The father also admitted that after the phone call,
# z, I) q- b* c) M( c: L/ nwhen he learned the testosterone level in the baby+ u5 B8 q6 N+ b4 Y( x/ D
was high, he then read the product information4 o7 z; i* q% g# X/ _
packet and concluded that it was most likely the rea-
, z+ l8 k; Y7 f( g7 W: Cson for the child’s virilization. At that time, they7 _6 ^) `5 x6 O9 C" l$ G# a
decided to put the baby in a separate bed, and the W4 O, _0 {, [3 |3 U
father was not hugging him with bare skin and had! t+ H4 p0 R2 X+ \4 n O) P$ O
been using protective clothing. A repeat testosterone; w1 U# ^ ]( N6 @) S; l
test was ordered, but the family did not go to the& h( d8 z4 N6 [% [ O7 T# H
laboratory to obtain the test.: |. Q& D% R1 ?
Discussion9 U$ N1 D y2 r2 o# @ h
Precocious puberty in boys is defined as secondary4 v# Z' H3 _) e6 w& f: K. H
sexual development before 9 years of age.1,4
8 k5 }- ^* b4 w( Y9 D c4 X6 XPrecocious puberty is termed as central (true) when
% x8 U5 q3 _+ l+ b1 m: [# Ait is caused by the premature activation of hypo-
5 E* [. K) O; R+ b2 C% N5 A5 othalamic pituitary gonadal axis. CPP is more com-; @/ `% ]2 N' z' z B0 G. P
mon in girls than in boys.1,3 Most boys with CPP
* c( H0 x8 ^ K/ k5 Qmay have a central nervous system lesion that is
/ C" t8 E J* r4 q' @1 f( Yresponsible for the early activation of the hypothal-
5 }; ?" v, F) Gamic pituitary gonadal axis.1-3 Thus, greater empha-; }1 D' q4 i! q* Z- ~
sis has been given to neuroradiologic imaging in
: e+ ]& l" C$ u5 @3 Z6 ]8 u( p" ~boys with precocious puberty. In addition to viril-
$ Z, N0 D5 O1 h0 L. [! Z! Yization, the clinical hallmark of CPP is the symmet-
# U% F8 E7 Z# ~# _2 Urical testicular growth secondary to stimulation by* U$ F! h) L/ N) d( k% Z7 p
gonadotropins.1,36 r% l2 h+ C& |, f# f8 G. _
Gonadotropin-independent peripheral preco-
1 R) t* @3 t( Dcious puberty in boys also results from inappropriate
% n4 F# h1 v: r$ ]$ t( Yandrogenic stimulation from either endogenous or, b. H: E5 F M# K% O/ H1 F
exogenous sources, nonpituitary gonadotropin stim-( k* t- l+ U. m& T" C* o: a
ulation, and rare activating mutations.3 Virilizing% f+ t) c( p' U- E& L
congenital adrenal hyperplasia producing excessive; d9 t% c3 N" T1 d* a
adrenal androgens is a common cause of precocious
4 `6 Y. h [8 C" q& Z! gpuberty in boys.3,4
U2 ]* D( m, n% e+ ^% [The most common form of congenital adrenal8 a1 T: q% O% Z
hyperplasia is the 21-hydroxylase enzyme deficiency./ G0 d' y6 ]$ Z& V) T3 h$ V
The 11-β hydroxylase deficiency may also result in/ o; X0 {0 c6 S7 \4 D
excessive adrenal androgen production, and rarely,, n* J" G! `) Z- r
an adrenal tumor may also cause adrenal androgen) q- t6 `. P0 {# h* a2 r4 V
excess.1,31 F! s' y8 e- I- H% r
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 Q3 D8 X h3 _( y, N$ \7 \3 x
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 K# G8 S8 b* l1 g! n0 P
A unique entity of male-limited gonadotropin-
6 r+ O% P5 k' L# F ?# @4 Uindependent precocious puberty, which is also known
9 d' C- S% \# [. Y+ V* Gas testotoxicosis, may cause precocious puberty at a
1 N6 x, l _' P+ [& z' ^very young age. The physical findings in these boys1 {- V; V& z6 U( U O1 e
with this disorder are full pubertal development,
! f: k& z0 u+ N8 q% [9 _# lincluding bilateral testicular growth, similar to boys
. c2 L5 l: ^/ Dwith CPP. The gonadotropin levels in this disorder
# W# [2 r: u Zare suppressed to prepubertal levels and do not show
0 S3 F/ N! j! ]& \0 kpubertal response of gonadotropin after gonadotropin-' p6 r* b. M; x( [9 `8 w) Q
releasing hormone stimulation. This is a sex-linked V7 c+ B6 v$ A, s
autosomal dominant disorder that affects only1 m% f6 @* N: u& L( Q
males; therefore, other male members of the family
' h9 d( ?' O$ U4 Nmay have similar precocious puberty.3
! E- j" d5 `0 W# }4 {9 c2 h3 oIn our patient, physical examination was incon-
9 S9 ]0 r& |4 M N. a* i4 tsistent with true precocious puberty since his testi-* M5 ]4 F0 d" @3 W/ s6 L
cles were prepubertal in size. However, testotoxicosis% k d$ q& ^! U
was in the differential diagnosis because his father
) k* c4 C" B. Z3 }6 S/ Cstarted puberty somewhat early, and occasionally,- X0 ^; C; |4 ]
testicular enlargement is not that evident in the
4 P, e' |7 I% H) B( c# N/ }beginning of this process.1 In the absence of a neg-. t5 A5 `1 L* ]. V
ative initial history of androgen exposure, our( F( |9 X! f7 F3 L( ~! W0 T
biggest concern was virilizing adrenal hyperplasia,! h% p. o+ ~& N+ o$ s. B
either 21-hydroxylase deficiency or 11-β hydroxylase- w% g# y( |( p
deficiency. Those diagnoses were excluded by find-# y$ O. t- V2 H
ing the normal level of adrenal steroids.. M/ Y: \" V5 y+ t
The diagnosis of exogenous androgens was strongly& Y" V# M: |0 R# S3 l
suspected in a follow-up visit after 4 months because
6 N; m4 \ Y- `( r) Xthe physical examination revealed the complete disap-+ L. Q/ h. G3 H' S$ {2 |3 ]
pearance of pubic hair, normal growth velocity, and) v% h2 N) R$ `" X9 q+ |2 r
decreased erections. The father admitted using a testos-
+ Y+ y1 z) }- I' A2 ~! Wterone gel, which he concealed at first visit. He was" h+ `- D) S: R) K5 ^# D4 R
using it rather frequently, twice a day. The Physicians’
/ t6 o$ Z/ U4 A0 d) i! k. \% h; jDesk Reference, or package insert of this product, gel or! w% M, O; ~ ]4 k
cream, cautions about dermal testosterone transfer to, e) l1 X4 P1 A5 }: V% `# L
unprotected females through direct skin exposure.
$ m. s, h) _. lSerum testosterone level was found to be 2 times the9 Q2 j% H) G! Y
baseline value in those females who were exposed to
7 m# l6 V5 x; D% meven 15 minutes of direct skin contact with their male
Z! M6 B2 n8 V* }2 [# p4 U8 {. }partners.6 However, when a shirt covered the applica-
" y" |# y% \/ z7 Y p6 G) E/ |tion site, this testosterone transfer was prevented.
. K0 W- v% t B/ s. }- HOur patient’s testosterone level was 60 ng/mL,
" ^# }) j8 C0 [; Twhich was clearly high. Some studies suggest that
, b2 P! m. V& jdermal conversion of testosterone to dihydrotestos-3 G* l% f* A; ]; Z8 a* L
terone, which is a more potent metabolite, is more! |# ?8 S0 U& l0 R
active in young children exposed to testosterone3 v B# a2 N& P& q
exogenously7; however, we did not measure a dihy-
* m+ |+ w! u4 k8 Kdrotestosterone level in our patient. In addition to
' `; r6 b: r) \+ N P, J( v, uvirilization, exposure to exogenous testosterone in) R& a& K3 P% x
children results in an increase in growth velocity and
4 \; T+ p* M" W7 ]5 E8 Wadvanced bone age, as seen in our patient.' i( e- V6 |8 T, B* a( B
The long-term effect of androgen exposure during
1 j: V, q& R7 _/ b7 _4 H5 Cearly childhood on pubertal development and final
) ^! } p8 E' R( |' l% Radult height are not fully known and always remain' g- Y8 Q8 `: h, @
a concern. Children treated with short-term testos-5 \) o3 D( i$ ], w0 y4 l1 Y
terone injection or topical androgen may exhibit some
- R* P: q+ k! Y* Z0 n$ V4 i6 xacceleration of the skeletal maturation; however, after c3 @9 s# X$ i3 Z! b# N7 b
cessation of treatment, the rate of bone maturation
# p' r/ G, k" n! I+ a' wdecelerates and gradually returns to normal.8,9
8 V$ p1 x; w3 V( m( }/ h2 g( PThere are conflicting reports and controversy
- o3 B/ X D% \; @2 v5 }over the effect of early androgen exposure on adult
' M1 B. |5 S/ h% @9 Zpenile length.10,11 Some reports suggest subnormal5 p9 Y- W' z' b/ {5 a6 ^! w
adult penile length, apparently because of downreg-
: Q% N) z3 R d' kulation of androgen receptor number.10,12 However,
4 a$ c" u" T4 R% i- g ]8 I5 VSutherland et al13 did not find a correlation between
! i2 C6 p- G6 u6 k/ X0 O4 v; Cchildhood testosterone exposure and reduced adult3 B7 e% C- K# a! ? t
penile length in clinical studies.( r! X' n- [0 j
Nonetheless, we do not believe our patient is
/ m0 \. k5 I3 c' L$ Igoing to experience any of the untoward effects from5 T9 C7 k, j+ z# v3 x3 m
testosterone exposure as mentioned earlier because+ a& B% U8 w+ \) m `& A1 X/ m
the exposure was not for a prolonged period of time.
2 V ^, b' T: m9 R4 IAlthough the bone age was advanced at the time of
' ~* ?# {- x9 ]2 R ]diagnosis, the child had a normal growth velocity at
! Q6 J3 G Y- ~% @% U$ \the follow-up visit. It is hoped that his final adult' ^/ O3 D f" l
height will not be affected.8 _8 W+ Y; D+ v4 |1 o
Although rarely reported, the widespread avail-
4 R$ Z+ L1 P/ w9 _; m2 c% h0 \ability of androgen products in our society may
6 z1 j @4 I8 \; A iindeed cause more virilization in male or female, R# q2 w( V `3 d j1 @) J
children than one would realize. Exposure to andro-( g5 X/ j6 b% |/ d6 k& t# V
gen products must be considered and specific ques-1 N$ f+ F& U+ {
tioning about the use of a testosterone product or
6 W, V# f7 ~& i% N( X1 W6 ~2 u8 [ G( t+ x* ygel should be asked of the family members during5 \# l( p, n+ d) _0 Q# A: ?4 b
the evaluation of any children who present with vir-
7 V- s" k* B6 b2 V$ Vilization or peripheral precocious puberty. The diag-
! f7 `$ Q$ Z- r' j5 Hnosis can be established by just a few tests and by
) t5 }! B3 b D# O8 gappropriate history. The inability to obtain such a
7 W' ^/ d1 N4 n Q( W5 t' rhistory, or failure to ask the specific questions, may8 y8 ^5 s* ^( q6 e6 C- f7 A
result in extensive, unnecessary, and expensive Y2 t' y4 [4 a) H" X5 A6 d
investigation. The primary care physician should be
3 S) D* P$ [. G$ [6 q* V2 i( {$ B0 kaware of this fact, because most of these children C9 E) F+ @$ a; [% T
may initially present in their practice. The Physicians’* Q+ z4 n6 ^3 N
Desk Reference and package insert should also put a
3 F0 S: Z! P: ?% iwarning about the virilizing effect on a male or+ L0 E. M6 Q' B* a0 d( @0 } a" H
female child who might come in contact with some-) X" y3 N4 C6 S1 \7 S- B+ P( X
one using any of these products.% n( ?3 ~- n$ s/ A7 y
References9 r( j# ~% X* g' q8 |
1. Styne DM. The testes: disorder of sexual differentiation; b8 X! W( v2 M) j% J
and puberty in the male. In: Sperling MA, ed. Pediatric
3 `# ]" D$ y1 A" p* sEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;0 i( C8 [' A2 L$ E
2002: 565-628.
+ y. ?2 Z: L( ^. D2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 f2 m, @6 k0 M& b, L1 e }& C
puberty in children with tumours of the suprasellar pineal
; E- A$ n2 _* V" e; Bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' B- f0 b: o8 C; R9 @) |, Z& [
Topical Testosterone Exposure / Bhowmick et al 543' F7 R) c7 W$ T
areas: organic central precocious puberty. Acta Paediatr.
4 [* S$ w( \: s/ j: I2001;90:751-756.7 x* R' x: A% l. l" b; q. U
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
6 Z! n9 L$ \ ?) T4 {4 bPediatric Endocrinology. 4th ed. New York, NY: Marcel
- F) N. ? T. j0 }/ R5 v8 S4 j1 hDekker Inc; 2003:211-238.
- {* u: x3 n- s* c4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual9 {; |5 o: C* D4 |1 N
development in a two-year-old boy induced by topical8 n5 G Q3 O* T% @3 o
exposure to testosterone. Pediatrics. 1999;104:e23.
& ?7 J# P) T, f% J3 c1 Z% w; `4 v5. Greulich WW, Pyle SI, eds. Radiographic Atlas of8 C3 l+ u! t; o
Skeletal Development of the Hand and Wrist. 2nd ed.5 E$ B7 e D( E$ T2 Z6 C. }- I
Stanford, CA: Stanford University Press; 1959.1 b7 m: E0 s$ b. _* s/ \
6. Physicians’ Desk Reference. Androgel 1% testosterone,
3 E0 g0 G2 ^0 y4 K7 L0 r$ NUnimed Pharmaceutical Inc. Montvale, NJ: Medical
6 O, b+ I( T( h GEconomics Company, Inc; 2004:3239-3241.
( K% p* b+ {6 i. Y& z1 h7. Klugo RC, Cerny JC. Response of micropenis to topical
7 z& @- F" c$ r% U& Jtestosterone and gonadotropin. J Urol. 1978;119:
7 X- Q9 I `) u1 v! C667-668.
! s/ b7 F% g; z- e- O* t8. Guthrie RD, Smith DW, Graham CB. Testosterone( F5 ^1 L7 q) q- j
treatment for micropenis during early childhood. J Pediatr.4 p% m8 l# C+ Q6 ?
1973;83:247-252.6 d& t, _& D8 y
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
6 {* z1 \6 @6 W8 F0 \$ f gtherapy for penile growth. Urol. 1975;6:708-710.
( K" a8 d3 \/ a; L10. Husmann DA, Cain MP. Microphallus: eventual phallic% }$ w. {7 h" c" U( y
size is dependent on the timing of androgen administra-
: A3 @: C5 c2 p S8 A; b ution. J Urol. 1994;152:734-739.( T3 B. \3 D8 g# E" I* C4 e
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:, S4 y# G3 W7 k3 Q# t
does early treatment with testosterone do more harm n; o3 Z7 O" u3 e/ r
than good? J Urol. 1995;154:825-829.2 m. z7 K+ j" q+ ~& B7 M
12. Takane KK, George FW, Wilson JD. Androgen receptor
7 J$ s8 d* p* ]3 M7 z2 Tof rat penis is down-regulated by androgen. Am J Physiol.
, l" W1 u: @1 `0 G1990;258:E46-E50.
. C6 z! d' j# ^ \13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect) v$ K: y" Z1 `+ L( c. o' P! f
of prepubertal androgen exposure on adult penile0 C1 t7 }$ l* T/ M
length. J Urol. 1996;156:783-787. |
|