- 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( e4 i& U% S6 i
precocious puberty (CPP), which is mediated
3 l6 q: ^6 j N8 J% M" s8 Gthrough the hypothalamic pituitary gonadal axis, has0 Y( W2 W+ e7 l! Y$ `* U! i; C
a higher incidence of organic central nervous system8 Q% @8 G1 f% ^( U/ M4 ~
lesions in boys.1,2 Virilization in boys, as manifested- {8 [5 E' [+ T% O
by enlargement of the penis, development of pubic& O' Q* c6 Z1 G Q/ y1 Y
hair, and facial acne without enlargement of testi-& [. l) |, D; J' I
cles, suggests peripheral or pseudopuberty.1-3 We6 V/ P0 g. r& t; z2 K+ f7 g
report a 16-month-old boy who presented with the3 w8 ]0 U* {: R! B/ F, s U
enlargement of the phallus and pubic hair develop-5 p6 [/ t# l& _1 E. X U$ o) w
ment without testicular enlargement, which was due0 A5 e. F; f0 |6 m1 w$ k2 R1 R |
to the unintentional exposure to androgen gel used by% e; r/ e8 D1 d2 F0 n8 |( {! D4 t
the father. The family initially concealed this infor-
% J9 h. A& J. K3 pmation, resulting in an extensive work-up for this
, h+ a, N! |) Q1 ^# O+ c$ D/ V) Zchild. Given the widespread and easy availability of% b& G3 U" F) S
testosterone gel and cream, we believe this is proba-
6 ?* X; D7 c& h3 p; ?: `( cbly more common than the rare case report in the3 U* ]( M% j' n$ o. T
literature.4
% n" m0 E$ M& K+ m* DPatient Report6 G( Q O9 K5 z; D0 k4 c3 }
A 16-month-old white child was referred to the& o/ ^8 q8 F4 s, s& @; ~% w- f: y: }
endocrine clinic by his pediatrician with the concern3 q8 ?) E4 I) j# J5 v2 `' {
of early sexual development. His mother noticed$ v5 A J& L K# H
light colored pubic hair development when he was' Q& ~2 ~- C( |- k7 `' E9 X
From the 1Division of Pediatric Endocrinology, 2University of
2 ~% F+ @, F" mSouth Alabama Medical Center, Mobile, Alabama.
; }+ A- V- l% u4 [. N/ V& a9 TAddress correspondence to: Samar K. Bhowmick, MD, FACE,' _3 U g+ |9 s
Professor of Pediatrics, University of South Alabama, College of# b/ X$ f2 t* x. E& y
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
9 z) K( H( G( n ^. Ke-mail: [email protected].
( s t9 s: s+ |4 X" c8 Dabout 6 to 7 months old, which progressively became
, y5 E5 _6 R: l1 N8 _0 t6 U* odarker. She was also concerned about the enlarge-: I3 }7 P0 c p* J U# h; l) z! e
ment of his penis and frequent erections. The child
2 s. m+ ~( W) j+ ?1 Hwas the product of a full-term normal delivery, with$ T7 }0 Y; C e) m
a birth weight of 7 lb 14 oz, and birth length of
) s$ z5 y; s/ {20 inches. He was breast-fed throughout the first year' }' W, L! \4 M0 _" P
of life and was still receiving breast milk along with
& s( F% g$ H% D% E: |' h, Ysolid food. He had no hospitalizations or surgery,
2 \5 a5 ?( }3 b! a. j0 Qand his psychosocial and psychomotor development
& v2 z) N; }5 Y3 v7 i+ cwas age appropriate.
3 V7 o2 r8 v: r/ Q+ S& IThe family history was remarkable for the father,$ ]! s4 D' _7 T9 w# m
who was diagnosed with hypothyroidism at age 16,
+ ^' Z2 F& B# m& ]( twhich was treated with thyroxine. The father’s
6 Q0 H; d" N/ q& h0 N7 rheight was 6 feet, and he went through a somewhat/ ?8 ~6 D& q. N
early puberty and had stopped growing by age 14.7 W( J* O4 j" v6 j V; ?
The father denied taking any other medication. The$ f$ U4 w1 H7 b& t$ e
child’s mother was in good health. Her menarche
* _& ^+ a$ x% B4 J6 p2 Mwas at 11 years of age, and her height was at 5 feet5 e7 V) u6 ^+ l* U6 O; H; D1 [
5 inches. There was no other family history of pre-
- a; Q( e/ a$ ecocious sexual development in the first-degree rela-; [& W1 B% t. O+ Q7 ~# `% y
tives. There were no siblings.
* y- q# z- e+ ~$ WPhysical Examination
7 }. B0 F9 g- p) j0 m2 PThe physical examination revealed a very active,) o j$ S* H2 _: i3 h) Y/ z
playful, and healthy boy. The vital signs documented7 V" h. R% G7 D4 P1 s8 k" t$ G. H. _
a blood pressure of 85/50 mm Hg, his length was
+ b5 a9 a. S! D5 V90 cm (>97th percentile), and his weight was 14.4 kg" H, V" e% N! M* |4 \* H
(also >97th percentile). The observed yearly growth
' S. V1 T( F4 F+ B, c. l1 pvelocity was 30 cm (12 inches). The examination of2 W8 D1 B/ U4 _+ Z6 Z
the neck revealed no thyroid enlargement.
! f0 v& d$ g$ R0 FThe genitourinary examination was remarkable for
( |) E) z; x- e( n0 Y, o+ i: B6 k( henlargement of the penis, with a stretched length of" e, T; ]( V1 @& ?
8 cm and a width of 2 cm. The glans penis was very well
1 O; u( J" G1 _5 U! t% f2 zdeveloped. The pubic hair was Tanner II, mostly around
6 L/ W* Z F; W8 r! G% U- s: w* s+ s540
$ Q* p: E6 H* l4 v$ A$ oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; i$ ~0 m, H1 b5 e
the base of the phallus and was dark and curled. The
( o% F f; ?4 a& o# w* |8 K5 ]testicular volume was prepubertal at 2 mL each.- T! u5 ~3 g6 `5 w# J
The skin was moist and smooth and somewhat3 y% [7 q; e- J
oily. No axillary hair was noted. There were no$ m0 _) z. l* P7 B3 I3 i
abnormal skin pigmentations or café-au-lait spots.* q8 k. q! [/ ~# C7 p0 R
Neurologic evaluation showed deep tendon reflex 2+ @, j1 @0 s. a8 U
bilateral and symmetrical. There was no suggestion
6 n/ P( d i, O1 wof papilledema.
; C; k {% i* _/ ` L cLaboratory Evaluation
$ J* J& A1 m7 o+ x+ o( ?. VThe bone age was consistent with 28 months by1 k; O1 D" h" C q$ k8 C Q
using the standard of Greulich and Pyle at a chrono-% O" Z) W, `+ }
logic age of 16 months (advanced).5 Chromosomal5 `* }7 e2 }+ `2 ~5 b( k
karyotype was 46XY. The thyroid function test/ z; e2 @9 d# n5 F* i7 O8 ?* I
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
0 G' P+ z+ ~( p- O \lating hormone level was 1.3 µIU/mL (both normal).
! n$ v$ d- x* e, l5 T, @The concentrations of serum electrolytes, blood
8 K) Y' v& }2 m& Z+ T* qurea nitrogen, creatinine, and calcium all were
9 K0 [6 T& a& `within normal range for his age. The concentration
6 c2 L0 T* v+ _* \6 _of serum 17-hydroxyprogesterone was 16 ng/dL( n' _- ?# y) g- B8 P7 V
(normal, 3 to 90 ng/dL), androstenedione was 20
! @( m: G2 [+ T7 r( |. X& ]ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-! L9 S2 F9 T+ G; g
terone was 38 ng/dL (normal, 50 to 760 ng/dL),5 Q" p) ^, Q' `9 z6 M6 B2 c
desoxycorticosterone was 4.3 ng/dL (normal, 7 to5 ?3 E; {6 [# J8 c( D$ s/ E5 U2 ]4 @
49ng/dL), 11-desoxycortisol (specific compound S)
& W- V6 X% _7 Wwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-% [. ~6 i' ]/ _3 g4 [* N3 L- r
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total! y* f" d1 n4 ^1 a2 r. h% n1 c
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
% E. C! L; g- n4 O# y; e1 R- Hand β-human chorionic gonadotropin was less than" |% K# w( C O0 M
5 mIU/mL (normal <5 mIU/mL). Serum follicular
/ V) } i0 @: D& t/ l- nstimulating hormone and leuteinizing hormone
6 }, f: {% y D! P6 A# `' n4 |concentrations were less than 0.05 mIU/mL
& b% i2 w& O" w1 B8 L(prepubertal).
. ]- M( N( C" W, _The parents were notified about the laboratory" M4 c( B& G- f k# _( Y$ a
results and were informed that all of the tests were3 o' i' k5 s* H: V/ J" N
normal except the testosterone level was high. The
8 i0 q+ |# E. E4 v" ?# rfollow-up visit was arranged within a few weeks to9 D; @- _, L4 o k
obtain testicular and abdominal sonograms; how-% J* s, M8 l* K! b4 T, Y
ever, the family did not return for 4 months.
/ F. r! P. Y* j0 o, zPhysical examination at this time revealed that the
& j+ M5 R; y0 I0 h6 y7 l' Achild had grown 2.5 cm in 4 months and had gained% t c! L! f: c- s- H# t
2 kg of weight. Physical examination remained4 }! G2 e7 Y3 r
unchanged. Surprisingly, the pubic hair almost com-
' W5 F5 u: I) T2 z8 Y3 Y1 j8 Q0 Npletely disappeared except for a few vellous hairs at Z: w* }; G! A1 B: \$ W
the base of the phallus. Testicular volume was still 2! T2 k( C* S& Z* T1 C% Q
mL, and the size of the penis remained unchanged.
1 t: b G2 o. ]The mother also said that the boy was no longer hav-: g* g* c& T3 q0 A
ing frequent erections.9 {9 c; T8 w0 X# G, b
Both parents were again questioned about use of% T5 g: I' q: f. G/ J9 o
any ointment/creams that they may have applied to) z1 d, `% v1 g) K: K& g
the child’s skin. This time the father admitted the$ N: ?+ l( C/ A6 d
Topical Testosterone Exposure / Bhowmick et al 5411 {% ]1 K! N) D6 \; I* ~' k
use of testosterone gel twice daily that he was apply-
" J9 x% [$ V+ x$ [6 _ing over his own shoulders, chest, and back area for; e- h3 T- a: b$ s
a year. The father also revealed he was embarrassed4 V5 t/ M. l9 u% W3 b2 `5 y6 \6 K
to disclose that he was using a testosterone gel pre-
3 y6 m& {$ c0 @scribed by his family physician for decreased libido
) i" `9 w: F8 Gsecondary to depression.; w# x" j U+ T
The child slept in the same bed with parents.
3 B2 b* K" b! s4 x7 n; E4 dThe father would hug the baby and hold him on his
7 H+ Q2 C! X- g8 Cchest for a considerable period of time, causing sig-+ k! `8 B- w' B- T8 p- d
nificant bare skin contact between baby and father.) U) f+ s4 ~* f' J. a8 A
The father also admitted that after the phone call,5 E6 q8 y$ _( _$ E2 I) s9 W9 E
when he learned the testosterone level in the baby
, `0 R, ^ |. N! m! G( g) {was high, he then read the product information( \, R+ l; F9 W" A! u: }
packet and concluded that it was most likely the rea-3 K+ V# o! ]6 p+ I7 |
son for the child’s virilization. At that time, they
+ G+ i7 \. H" U5 B8 x) }' v- C* {decided to put the baby in a separate bed, and the8 H: q( Z, i$ Q2 m) ?- L1 ^
father was not hugging him with bare skin and had& p. j$ l U) J. O7 l, u7 A
been using protective clothing. A repeat testosterone
& z$ z1 I- C+ G* \test was ordered, but the family did not go to the0 F( X0 I- n3 v5 a% V8 x/ P t' U
laboratory to obtain the test.% Y* e1 W# P/ Z9 b' L
Discussion
6 \- J5 J2 u7 J9 KPrecocious puberty in boys is defined as secondary1 B. {% p' \' i( M$ J7 B
sexual development before 9 years of age.1,4
6 G8 K1 z) U2 h/ D! WPrecocious puberty is termed as central (true) when$ `7 J1 w* O, e& O( }
it is caused by the premature activation of hypo- l' F2 o: Q) }8 `/ c1 w' E
thalamic pituitary gonadal axis. CPP is more com-
; `! L/ m3 r( e0 h/ o5 x( |mon in girls than in boys.1,3 Most boys with CPP
4 K9 j1 d' W& f! W5 ymay have a central nervous system lesion that is
) u9 s. s. E/ ]' V1 } Rresponsible for the early activation of the hypothal-
1 O. f- c+ S; O1 [1 F0 kamic pituitary gonadal axis.1-3 Thus, greater empha-
9 c* b, z, e+ o- G8 B' Ksis has been given to neuroradiologic imaging in: j1 \; B4 Y% b2 K y
boys with precocious puberty. In addition to viril-
. ?6 w* H/ W2 w; @ization, the clinical hallmark of CPP is the symmet-
/ z) Z. Z5 ~4 s. s% C9 k$ rrical testicular growth secondary to stimulation by2 q* {+ e1 V7 j- P
gonadotropins.1,3
( p( C" h4 q; j% _0 Z6 U1 {Gonadotropin-independent peripheral preco-
& i% W5 F! F5 C# k$ L5 p5 n( hcious puberty in boys also results from inappropriate8 d1 b1 T& Y3 ?# n: M1 W. a
androgenic stimulation from either endogenous or4 t5 k$ i% q+ E4 F n6 q
exogenous sources, nonpituitary gonadotropin stim-+ S p3 H0 \$ G0 P
ulation, and rare activating mutations.3 Virilizing
i2 l3 a+ J8 p/ e6 P7 n, ~- bcongenital adrenal hyperplasia producing excessive2 Q3 O& p9 i4 `
adrenal androgens is a common cause of precocious, S ]& \# H1 ?' h% ]7 t3 D3 F
puberty in boys.3,4* p; P- A9 I' Z
The most common form of congenital adrenal
" h4 k: |5 D5 d9 Y5 ^3 _% Ehyperplasia is the 21-hydroxylase enzyme deficiency., S4 o, `" }6 f8 r4 o/ L% Q
The 11-β hydroxylase deficiency may also result in
- F5 |$ i3 n& |# G' uexcessive adrenal androgen production, and rarely,
7 W8 t$ j. n5 k% T$ B: G: d% Lan adrenal tumor may also cause adrenal androgen8 g; I% x$ L% s7 u8 F K
excess.1,3
X* E& v; B- z3 z% K6 oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 \: w" t0 ]' F$ [+ ]+ L542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
, h. d9 S& a9 A5 [A unique entity of male-limited gonadotropin-
: ]" Y: V& ~. u% o; mindependent precocious puberty, which is also known
, v5 I8 c$ `7 V' }+ r2 \0 das testotoxicosis, may cause precocious puberty at a
( n& A* u3 k+ S( z; l6 kvery young age. The physical findings in these boys
9 T: ^! h; c3 X- n1 qwith this disorder are full pubertal development,! m8 A# d: d* h1 i# V
including bilateral testicular growth, similar to boys
7 _; T0 k$ o! Q/ M Q0 ^with CPP. The gonadotropin levels in this disorder
4 k& R; O6 F" X3 H6 r% Care suppressed to prepubertal levels and do not show
5 U% k; G1 W' N8 _1 j- V7 fpubertal response of gonadotropin after gonadotropin-
$ u9 k' T6 A) [( y: K* {$ w- V- zreleasing hormone stimulation. This is a sex-linked
/ ?2 B3 i. K nautosomal dominant disorder that affects only
; l# U' p) j+ E: gmales; therefore, other male members of the family% y- k; V5 z2 K: d( r
may have similar precocious puberty.3
- y/ S/ Z: O/ c# M3 W9 BIn our patient, physical examination was incon-
- s7 ~6 L, l M; ?9 Vsistent with true precocious puberty since his testi-% c& i9 `' G. z( }, w/ W, |5 [
cles were prepubertal in size. However, testotoxicosis
+ R$ J; X3 V6 T. E1 D) X4 pwas in the differential diagnosis because his father6 W7 }: j+ l+ i* R r* c
started puberty somewhat early, and occasionally,
; \) ?9 A6 e: |1 ptesticular enlargement is not that evident in the: m' \+ _& G; ?/ |6 m
beginning of this process.1 In the absence of a neg-2 Z/ P. l, m, l2 {
ative initial history of androgen exposure, our8 q9 o- W- @, k/ b% o2 d2 B
biggest concern was virilizing adrenal hyperplasia,
5 P) u, u3 O+ r' A! teither 21-hydroxylase deficiency or 11-β hydroxylase1 j+ R2 f' `# L0 |4 s i
deficiency. Those diagnoses were excluded by find-% G* P& E0 x; i0 Q$ P) \
ing the normal level of adrenal steroids.
* Y# O/ ^; Q: }The diagnosis of exogenous androgens was strongly
( S4 @% k' a. X7 ~% Q0 qsuspected in a follow-up visit after 4 months because# `! [3 ~# `2 U9 t
the physical examination revealed the complete disap-( `* r: i9 i+ y, X
pearance of pubic hair, normal growth velocity, and0 f$ n9 T* X* Y: g1 J) ?
decreased erections. The father admitted using a testos-
) }( c; w. |$ n. t3 y. O8 r& Vterone gel, which he concealed at first visit. He was
& N7 t! x0 x) c2 ~using it rather frequently, twice a day. The Physicians’) b1 i3 O3 L3 h& g
Desk Reference, or package insert of this product, gel or0 m9 b8 q. t0 @
cream, cautions about dermal testosterone transfer to
- S* C- A( I# Cunprotected females through direct skin exposure.) ^( ~! g" N! a
Serum testosterone level was found to be 2 times the7 X7 ` u2 `! a) E
baseline value in those females who were exposed to d1 M8 _/ E/ T1 L r
even 15 minutes of direct skin contact with their male
8 R& ~- v1 P6 f$ Tpartners.6 However, when a shirt covered the applica-
^. I/ A8 _ x' ~# }tion site, this testosterone transfer was prevented.
7 Z h( ~* a; U xOur patient’s testosterone level was 60 ng/mL,
- o1 B* j3 q0 O! bwhich was clearly high. Some studies suggest that
8 K' a7 X, [, b4 `7 `8 h! M) Tdermal conversion of testosterone to dihydrotestos-
* Y9 F% v: q1 B/ K. A6 z/ ~5 @ mterone, which is a more potent metabolite, is more
8 ?' R7 c8 L% f3 z/ t+ }9 eactive in young children exposed to testosterone
9 H, h4 ^$ ~0 s/ Y/ t' \$ N9 d% y0 xexogenously7; however, we did not measure a dihy-
3 B( O2 u. t- `7 n2 T- Bdrotestosterone level in our patient. In addition to1 _) C d! v" C+ }
virilization, exposure to exogenous testosterone in
: k+ @) m4 ~( c) [* `4 d" g8 Wchildren results in an increase in growth velocity and
: H' d7 J3 Q/ w) I, v8 padvanced bone age, as seen in our patient.
- n8 g/ O4 O3 u$ z# mThe long-term effect of androgen exposure during5 L. a4 u0 _" y* B6 x
early childhood on pubertal development and final& U# E3 z% B0 b" K) {* ^$ U
adult height are not fully known and always remain; i: Y; ~- }# i5 o8 F6 R' C% `3 k2 b, t
a concern. Children treated with short-term testos-" R! o z: ?( Y# H+ U
terone injection or topical androgen may exhibit some
) D- T4 q4 q7 ?: t2 `, v( |9 ]acceleration of the skeletal maturation; however, after: c5 u$ E( H# G& E9 d3 E
cessation of treatment, the rate of bone maturation
9 }8 D6 E/ M) ]$ A& Pdecelerates and gradually returns to normal.8,99 a; k8 ?! g4 P3 y
There are conflicting reports and controversy
5 p# |% W) C, y; O/ E' ^6 yover the effect of early androgen exposure on adult
3 R# _3 \* K8 P0 E0 m% Npenile length.10,11 Some reports suggest subnormal' I6 V) } e7 W4 Q6 g2 D
adult penile length, apparently because of downreg-
' l$ `1 ], I8 x( T& }' Q# N8 f( Mulation of androgen receptor number.10,12 However,
2 F, c; u" x+ Z, j9 }7 LSutherland et al13 did not find a correlation between
7 w. b( s4 v3 t Y5 Bchildhood testosterone exposure and reduced adult9 d# h7 d" b+ T7 h& G/ I0 P+ C
penile length in clinical studies.
1 O0 k' l6 ^' h; B( H6 SNonetheless, we do not believe our patient is2 j: O* b' g3 k9 B! t8 ?* M
going to experience any of the untoward effects from/ z) f; o+ Z7 d# t( `9 l: \
testosterone exposure as mentioned earlier because7 _' Y% o( S, `2 _
the exposure was not for a prolonged period of time. m, v" F- o8 P: ^2 q8 Y# ?/ v$ _
Although the bone age was advanced at the time of
/ Z4 ], E) t8 D% H. |+ hdiagnosis, the child had a normal growth velocity at
& I8 Z0 K! y5 {3 m% w4 {9 K! }the follow-up visit. It is hoped that his final adult
6 w' K/ ~; k+ a! \5 Z4 }9 ~; d! ^height will not be affected.
' r6 B; C- k; ^$ _) _8 w% [( oAlthough rarely reported, the widespread avail-. h/ B% m; M* C0 Z( N6 P- {3 ^
ability of androgen products in our society may
8 D2 X. g# W3 f6 g5 N2 {0 {. `, L# a4 }3 aindeed cause more virilization in male or female
2 m5 m3 ?( k; C: Y- {children than one would realize. Exposure to andro-0 o {7 p$ x2 i1 v0 K! F$ x
gen products must be considered and specific ques-
! E+ e, F- Z1 D# t* l- ationing about the use of a testosterone product or
; i8 B0 v) }$ lgel should be asked of the family members during
1 [0 p( N) ^1 s- F" M6 zthe evaluation of any children who present with vir-+ `( M; D- |/ _* s, c# P) l) y' ]" @
ilization or peripheral precocious puberty. The diag-9 w+ E; S0 f8 Q. t
nosis can be established by just a few tests and by
8 N4 t: F6 j3 h) F8 S( @appropriate history. The inability to obtain such a
9 `2 e. i# Z: H7 c7 s C# s9 Bhistory, or failure to ask the specific questions, may
+ }* e. q( y) e( m* Jresult in extensive, unnecessary, and expensive- p* d& l H. p, R" \% N
investigation. The primary care physician should be
) _* a8 B6 W& r3 |7 Qaware of this fact, because most of these children) a0 s- w" V: c: X: B
may initially present in their practice. The Physicians’
" L0 x; A8 [5 p0 a0 vDesk Reference and package insert should also put a i2 _; @* h3 W& X% p
warning about the virilizing effect on a male or
8 b8 L; {: m, b3 j+ q( P, \female child who might come in contact with some-3 u' T+ S2 E% s5 W
one using any of these products. o6 t& O& |4 z7 y0 e
References% z9 W) B# a' d: i
1. Styne DM. The testes: disorder of sexual differentiation
3 q# w5 W, c5 J% D cand puberty in the male. In: Sperling MA, ed. Pediatric l/ [( j4 c `. G* f' s/ n
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;. ]# z* R: q1 C! ]8 m& ^* v6 j/ O
2002: 565-628. I s! f: ^, H4 e
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
! K. M, w+ E! Y# E1 zpuberty in children with tumours of the suprasellar pineal
3 a7 \6 n. H+ X5 f' jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, { O* e6 w, A) P/ k. {Topical Testosterone Exposure / Bhowmick et al 543
( Q6 J4 G: o: L/ ]. k- N- \8 Nareas: organic central precocious puberty. Acta Paediatr., h1 Q) R: ~5 s* N4 \8 v5 d, m
2001;90:751-756.
, |: D8 U5 c/ x3 g3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
. R( @$ i; o( d. iPediatric Endocrinology. 4th ed. New York, NY: Marcel
- g5 L4 c- n, C% X; r, r/ b& K; BDekker Inc; 2003:211-238.: {% Y* _, D- Q( ~
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
; q/ y8 |2 l& t) Y) ^7 V' gdevelopment in a two-year-old boy induced by topical5 x) Z& H+ R( r' W! t1 R; A9 |
exposure to testosterone. Pediatrics. 1999;104:e23.5 G: B6 z% {2 S" S6 `
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
+ v2 h1 Y& L) ~+ MSkeletal Development of the Hand and Wrist. 2nd ed.- n- c/ X* f2 Q$ V# T: U }) E6 x) X6 X
Stanford, CA: Stanford University Press; 1959.% ~2 L9 z: v5 y1 k
6. Physicians’ Desk Reference. Androgel 1% testosterone,% {' q- k- M# D7 W
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
8 f/ v! L# @2 M' Y, D1 Q2 m0 bEconomics Company, Inc; 2004:3239-3241.: }9 _, f) y( N
7. Klugo RC, Cerny JC. Response of micropenis to topical+ F5 a6 [# c. j
testosterone and gonadotropin. J Urol. 1978;119:
; I! y9 e: b6 G3 c/ j7 f667-668.
5 X6 E; g8 c# B/ k7 Q& u8. Guthrie RD, Smith DW, Graham CB. Testosterone! r. y* K. Q% }* M) M0 @$ L/ P; q
treatment for micropenis during early childhood. J Pediatr.
, u: E- |4 I3 b. I/ a4 d6 U1973;83:247-252.
7 J$ ], z- U* ~: w0 l0 Y& k: x7 [3 ], m+ h9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone( z7 t" c5 U: E7 H% n) X
therapy for penile growth. Urol. 1975;6:708-710.
& b2 z* h9 d- a1 y( D10. Husmann DA, Cain MP. Microphallus: eventual phallic
: a! A. E" k4 L+ Rsize is dependent on the timing of androgen administra-0 N+ ]2 V, v$ ]4 v- s; ]1 G
tion. J Urol. 1994;152:734-739.4 Y! H$ H* e# h; L
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:5 r$ c; [( J4 w2 [. O: q, D9 r9 i7 o
does early treatment with testosterone do more harm
# y) P+ N' X! _ Ethan good? J Urol. 1995;154:825-829.
2 z: }1 s' U3 Y9 P: ^& \. S+ g% i12. Takane KK, George FW, Wilson JD. Androgen receptor
) {: F" ?6 V" t* Sof rat penis is down-regulated by androgen. Am J Physiol.: p( Q, M5 }; k# N- ?
1990;258:E46-E50.
( ?( L( U. y2 L+ V13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect& ?/ F6 o4 h8 i K9 k2 m6 J v
of prepubertal androgen exposure on adult penile4 N; J( J& C$ ?" v
length. J Urol. 1996;156:783-787. |
|