- 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
6 I7 Q) U0 o4 N: h) kprecocious puberty (CPP), which is mediated0 U( ]: Y4 \+ o8 }
through the hypothalamic pituitary gonadal axis, has) m; t4 i9 \' e/ C8 P! J. A0 e+ m/ a
a higher incidence of organic central nervous system3 s4 \7 x: \# m
lesions in boys.1,2 Virilization in boys, as manifested( P( C8 I9 a* p6 _5 s
by enlargement of the penis, development of pubic4 @' |6 z E3 B, j5 U3 W& K) H
hair, and facial acne without enlargement of testi-
5 r/ g+ c7 d6 J2 w# z# Ocles, suggests peripheral or pseudopuberty.1-3 We
0 v! p& S) E/ c* Creport a 16-month-old boy who presented with the5 }7 r1 v' {+ _ a! W0 ~
enlargement of the phallus and pubic hair develop-% a" W( c# y7 L6 ^
ment without testicular enlargement, which was due
" Z! b! D) `0 g- O2 k. Z: q5 s. x. `to the unintentional exposure to androgen gel used by' K" Z6 }- ?& Z$ q& h/ L2 Q
the father. The family initially concealed this infor-
8 Y! V4 Y5 [+ xmation, resulting in an extensive work-up for this9 m2 f. v! e1 C9 m6 T
child. Given the widespread and easy availability of
- n6 |% h9 t& ]/ k! Ftestosterone gel and cream, we believe this is proba-8 x% f5 b0 K# m" F
bly more common than the rare case report in the _/ m% D' y o7 F( K& f7 g- k
literature.4
$ w- k; R" G& \9 [4 ePatient Report4 z& }2 W" I$ A4 x U
A 16-month-old white child was referred to the5 L% {& _1 N( j' |2 M, ]" q
endocrine clinic by his pediatrician with the concern
& y5 {8 Z9 `# Bof early sexual development. His mother noticed, ]$ Y8 u: F! b l
light colored pubic hair development when he was, j3 @# R$ g0 t0 v% w# W( F
From the 1Division of Pediatric Endocrinology, 2University of0 K+ \3 r% ~. s1 D# ?5 a
South Alabama Medical Center, Mobile, Alabama.0 x U% O) X: w* d4 `) N
Address correspondence to: Samar K. Bhowmick, MD, FACE,
$ J% H2 P. C- G: {, r% _Professor of Pediatrics, University of South Alabama, College of5 S& |0 v7 g9 G( m) k
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;6 d' n! e" w- h ^* [5 x
e-mail: [email protected].
2 e6 d0 m2 a2 u0 R, }about 6 to 7 months old, which progressively became* J& ], N% R' u% Z! D
darker. She was also concerned about the enlarge-( ]" L8 P5 F& [$ J1 y
ment of his penis and frequent erections. The child( p( U% h/ N/ l/ E% a2 u# h
was the product of a full-term normal delivery, with
" }( V2 n5 _' u. b# H2 q* v. @a birth weight of 7 lb 14 oz, and birth length of
5 g* L0 d* T% ^$ V8 M0 a20 inches. He was breast-fed throughout the first year
X: W4 j. R L" lof life and was still receiving breast milk along with
0 V# [3 p+ p [solid food. He had no hospitalizations or surgery," N9 X! b* q/ K& ?
and his psychosocial and psychomotor development
/ q8 ?, t. m: ^. b) awas age appropriate.
6 X! \2 l' Y) g9 A% h; tThe family history was remarkable for the father,5 s7 l2 @* a7 y- W2 ~! I7 d5 l. g s9 G
who was diagnosed with hypothyroidism at age 16,5 D( w6 B3 H/ V8 p
which was treated with thyroxine. The father’s2 t) Q* `: @- S# M
height was 6 feet, and he went through a somewhat
1 R/ [9 l" W0 b$ Q- H& \early puberty and had stopped growing by age 14.1 r! K# _4 k$ I0 m1 u( R. h+ \
The father denied taking any other medication. The
5 U/ i2 T* }3 ?6 R% O2 R: v1 Lchild’s mother was in good health. Her menarche
9 x/ F2 |. w& O+ v @" L: \was at 11 years of age, and her height was at 5 feet$ M/ P5 J l) [0 x. v) I5 G9 h8 {
5 inches. There was no other family history of pre-
- m7 I$ ]4 J; {! l9 o+ scocious sexual development in the first-degree rela-9 m q5 x/ W* f
tives. There were no siblings.
5 W$ ^5 v. \7 bPhysical Examination* W- ^. @) A# y, M
The physical examination revealed a very active,8 Q9 A! n7 s3 `' W* e
playful, and healthy boy. The vital signs documented' D, z- X6 N7 I C0 A2 q
a blood pressure of 85/50 mm Hg, his length was
+ t3 t. T0 q0 V. n4 `2 n" Y90 cm (>97th percentile), and his weight was 14.4 kg
~) v1 g8 s, q* o- b(also >97th percentile). The observed yearly growth
* F" x1 X' v! \* Dvelocity was 30 cm (12 inches). The examination of: j f; _4 W, W+ W! ?6 q
the neck revealed no thyroid enlargement.' x7 t5 _8 x( |3 B
The genitourinary examination was remarkable for1 w) P, W; l* ?! q/ y( @- s9 |
enlargement of the penis, with a stretched length of# U: {, f9 L; U7 m9 M
8 cm and a width of 2 cm. The glans penis was very well0 n# P. ^* x& ^3 q& U2 C. k3 t
developed. The pubic hair was Tanner II, mostly around6 J* C" k" ~, e% B
540# o0 h& S! m7 N4 E4 S% ]
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from4 p2 P+ I. W; S& L3 z
the base of the phallus and was dark and curled. The9 S, ]! S& ~/ _" F. L
testicular volume was prepubertal at 2 mL each.
& H2 v6 h+ ^2 H' ~9 _+ kThe skin was moist and smooth and somewhat
+ Y7 Y( S" Z7 ^' d+ A& l. Hoily. No axillary hair was noted. There were no/ R7 q3 g5 K$ |- N4 N" B
abnormal skin pigmentations or café-au-lait spots.
2 y5 ^9 J8 h( n" }% E; r2 w/ RNeurologic evaluation showed deep tendon reflex 2+
! n# n& }6 ^- ~3 X+ Pbilateral and symmetrical. There was no suggestion
2 ]) o6 ~2 K% Q. r% F+ c, rof papilledema.1 Q( `+ j6 V: p" z' ^+ X9 K
Laboratory Evaluation
8 B. Y9 X& ~' Y) v0 D, ]) ?The bone age was consistent with 28 months by# I# ?5 H- E8 C- b3 g( T
using the standard of Greulich and Pyle at a chrono-
$ U% q: X' W* J! u. W; y! @& e2 Tlogic age of 16 months (advanced).5 Chromosomal) V: f% f' I( Z2 ?0 K5 I% C
karyotype was 46XY. The thyroid function test
( s* Q4 S2 G3 i' K6 h" @0 `; Rshowed a free T4 of 1.69 ng/dL, and thyroid stimu-9 z9 Y' K( ?3 G4 I
lating hormone level was 1.3 µIU/mL (both normal).
& L$ t5 E; R& Y/ }' r, o. S hThe concentrations of serum electrolytes, blood& ^' o [+ ?9 a0 i. |) N/ B
urea nitrogen, creatinine, and calcium all were
d( `' u, z" `8 J" y# S" Iwithin normal range for his age. The concentration
& m; l; H& I0 \% f7 O% ]& yof serum 17-hydroxyprogesterone was 16 ng/dL. F9 L* v- ~! V+ O, L
(normal, 3 to 90 ng/dL), androstenedione was 207 D9 T& H& l2 Y% S& i0 a& Z% `+ B5 d
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
0 r5 s: l3 @1 L# C, a+ Fterone was 38 ng/dL (normal, 50 to 760 ng/dL),
9 [' w- Z0 m! n* q+ t9 Fdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
, n1 ] I7 n6 p. V! o, |5 ~1 _49ng/dL), 11-desoxycortisol (specific compound S)$ x/ X7 O, U; _3 o; C
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
% e# X# w/ @1 N6 T1 Qtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
. E5 M" x$ c7 i/ l6 m: ~( u" Htestosterone was 60 ng/dL (normal <3 to 10 ng/dL),2 n# i3 j7 x8 _9 s N
and β-human chorionic gonadotropin was less than
, l( e6 b Q: N/ L% W9 p6 G5 mIU/mL (normal <5 mIU/mL). Serum follicular g9 m, h9 f$ J* G9 n6 ~8 F( Y
stimulating hormone and leuteinizing hormone' T q7 ]4 f. T: t* p: J1 ^1 D
concentrations were less than 0.05 mIU/mL
. g# A+ B# F7 P, p$ \- a1 G. R(prepubertal).; D! t# q, q8 h' o; t) k! ]6 h
The parents were notified about the laboratory# z/ R. V! w. y
results and were informed that all of the tests were
$ y1 x, C/ ?# e- o* g$ y; `% V" i5 rnormal except the testosterone level was high. The
1 N9 v8 o& ~- h3 B( M8 B, Yfollow-up visit was arranged within a few weeks to
0 W g8 C! O! Zobtain testicular and abdominal sonograms; how-
( z$ F4 f6 j; @9 }' J3 eever, the family did not return for 4 months.8 b6 Q5 c( o9 t0 O4 P9 |5 e* h
Physical examination at this time revealed that the
; F* x* e2 v9 E' O l( v8 dchild had grown 2.5 cm in 4 months and had gained
7 f; C' v6 o0 {* B2 kg of weight. Physical examination remained
& C# ~' M6 I! u! s1 } a+ h, Nunchanged. Surprisingly, the pubic hair almost com-( M3 O% X1 c' X' U4 Q
pletely disappeared except for a few vellous hairs at6 m& C2 x5 T: W0 W! n7 J
the base of the phallus. Testicular volume was still 2
4 \3 L! d$ o; c3 l4 wmL, and the size of the penis remained unchanged.9 K2 p3 f' W7 l" X3 S
The mother also said that the boy was no longer hav-
; ^' r( x; N4 S; Xing frequent erections./ p2 B; @' t) V {
Both parents were again questioned about use of/ ]3 Q# D; Y* [9 e$ g% l
any ointment/creams that they may have applied to
4 b7 P' F5 _; g, @- l# V' zthe child’s skin. This time the father admitted the+ l" h3 g- E1 i1 ~4 L8 Z- h
Topical Testosterone Exposure / Bhowmick et al 541
, q) b ^% r$ T3 u8 tuse of testosterone gel twice daily that he was apply-( a6 S8 V* F" O, m
ing over his own shoulders, chest, and back area for" t* M: V1 }, N+ }% S# d! o7 Z; {
a year. The father also revealed he was embarrassed; }* K& w0 `+ z. G! I. Q- }7 D
to disclose that he was using a testosterone gel pre-
7 e/ v# y8 V! X: `" Jscribed by his family physician for decreased libido
; |2 w. c6 n/ Q( a4 ksecondary to depression.9 I4 e* _' V0 q$ m& h+ w
The child slept in the same bed with parents.
% Q+ Y6 @" Z r @The father would hug the baby and hold him on his
% S8 F. r5 e, ^# Tchest for a considerable period of time, causing sig-
- g! z( e4 {6 J2 Onificant bare skin contact between baby and father.
+ U* c4 e0 S5 ?# F, t6 ~The father also admitted that after the phone call,
6 u7 q% l) n- N Pwhen he learned the testosterone level in the baby1 p, G/ B3 Y6 o' r1 D1 `% h
was high, he then read the product information% y; F& S' P8 V% b9 k
packet and concluded that it was most likely the rea-4 V5 _- f4 ]2 a* @1 I' I: b. W
son for the child’s virilization. At that time, they
$ O+ d) p2 |* f: Z jdecided to put the baby in a separate bed, and the" P, r& G5 X# Y b- l! ?% b8 K
father was not hugging him with bare skin and had2 p2 o( P- c$ r% b, v7 f. N
been using protective clothing. A repeat testosterone
' D# _; [& n7 i) c) ~6 }test was ordered, but the family did not go to the
* a8 g* C& M& S4 E1 s ], vlaboratory to obtain the test.8 q( J0 Y& F h- O- t
Discussion
- ~5 K" s3 i0 v% \Precocious puberty in boys is defined as secondary
W" @( d ~4 ^8 R* s1 tsexual development before 9 years of age.1,4! W1 C3 j: f. D. x# Z* U
Precocious puberty is termed as central (true) when
7 ~, Q' |) [6 A% Z" k* @7 Wit is caused by the premature activation of hypo-7 u" f/ H6 Z' i
thalamic pituitary gonadal axis. CPP is more com-* z/ ?8 T/ o& M6 K, |2 ~8 ^
mon in girls than in boys.1,3 Most boys with CPP% k( u3 U5 J& o* [: G: ^
may have a central nervous system lesion that is0 X: g+ x/ ^2 \0 e" F
responsible for the early activation of the hypothal-4 G7 y" r1 j$ o: Q2 W4 r) x
amic pituitary gonadal axis.1-3 Thus, greater empha-
. Z% a3 Q0 X1 f. w( e4 Msis has been given to neuroradiologic imaging in/ s) o0 [$ M/ n$ @0 f4 H8 @
boys with precocious puberty. In addition to viril- a% d8 I0 @3 j, S, @( l" Y, }' `- M
ization, the clinical hallmark of CPP is the symmet-4 @) j( d/ |; F7 z' h. f. N/ u# {
rical testicular growth secondary to stimulation by
; w8 G w; e9 k+ O7 rgonadotropins.1,3% L) A$ n5 z+ _- c( B1 B& r
Gonadotropin-independent peripheral preco-/ ?! N& P& S: J
cious puberty in boys also results from inappropriate8 T, m6 f3 N- g
androgenic stimulation from either endogenous or
" {' K2 @7 b4 uexogenous sources, nonpituitary gonadotropin stim-
1 ~' s% _6 E0 M) j) l4 B$ V) vulation, and rare activating mutations.3 Virilizing
& f4 ]3 u: j5 t0 G# ~8 Ucongenital adrenal hyperplasia producing excessive
3 B5 q; b& f q0 Madrenal androgens is a common cause of precocious
# q: W m( ?) H" y6 M3 Hpuberty in boys.3,4
! L% C) x+ y. F! WThe most common form of congenital adrenal) F$ E! L! p4 C" j7 F V" l
hyperplasia is the 21-hydroxylase enzyme deficiency.
1 p$ o& a9 v* h+ B5 z5 D1 M. Y1 nThe 11-β hydroxylase deficiency may also result in) U. [4 i1 o* A9 t; U+ P D
excessive adrenal androgen production, and rarely,# Q9 [: z- Y7 I, Q2 ~! h* B f2 \
an adrenal tumor may also cause adrenal androgen
1 i6 x8 S' }9 k7 ~. z+ Z7 Kexcess.1,3& M. e" j) d0 }
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" `0 |3 E; a7 H5 o8 ^3 I. K# L542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
' o0 H9 I0 n n. lA unique entity of male-limited gonadotropin-) K6 v+ W; H# W* U% N8 T
independent precocious puberty, which is also known3 E0 i+ }( v: m3 M# G8 `# t& a
as testotoxicosis, may cause precocious puberty at a9 M( b! \! k* _3 X+ l- @
very young age. The physical findings in these boys& Y2 x: q1 m: r+ [/ h) M6 p7 }
with this disorder are full pubertal development,
% O5 ^" D( u* o: K8 t$ C. Nincluding bilateral testicular growth, similar to boys! H- Q! x. f9 l. L5 x% C( H1 e8 a8 r
with CPP. The gonadotropin levels in this disorder
' P+ N+ X2 D8 J$ O6 I7 xare suppressed to prepubertal levels and do not show
1 K) N: D2 F& H) T6 `5 upubertal response of gonadotropin after gonadotropin-( ]$ \7 U3 O5 I& p/ c
releasing hormone stimulation. This is a sex-linked& @4 d( e; y, U
autosomal dominant disorder that affects only7 h2 }: @% Q( b9 \4 h0 t" U
males; therefore, other male members of the family7 Z2 a+ L+ h0 x6 H$ {0 j
may have similar precocious puberty.3
& b, J+ \; V) U% KIn our patient, physical examination was incon-+ _; B: I! C. I. h% x3 L
sistent with true precocious puberty since his testi- W: f% E8 u# H( E4 v; D" K' s3 N
cles were prepubertal in size. However, testotoxicosis0 ]2 z8 j% b1 Z! U6 K" M; K
was in the differential diagnosis because his father
; `& \; x6 ~5 a7 ystarted puberty somewhat early, and occasionally,
~$ x6 e9 F5 K8 ztesticular enlargement is not that evident in the
9 K: b) Y" F! R5 bbeginning of this process.1 In the absence of a neg-
+ T6 [+ k9 F7 H+ l$ G& uative initial history of androgen exposure, our0 @) \; C1 S* Q& }4 S
biggest concern was virilizing adrenal hyperplasia,
& [+ D; I; Y$ r9 H( X- [ ~either 21-hydroxylase deficiency or 11-β hydroxylase
4 R' I5 O9 o" M- N) N" v% a+ F' ]deficiency. Those diagnoses were excluded by find-4 u- P8 ~8 C4 y, c* |9 m
ing the normal level of adrenal steroids.
% T* Z' _0 A% ^+ B2 z4 D7 q j6 jThe diagnosis of exogenous androgens was strongly: K% L- @- a% B9 R2 W/ T! u" |
suspected in a follow-up visit after 4 months because/ v- M5 k+ c# ? h' Z) V
the physical examination revealed the complete disap- S" u2 }( K* O1 O$ H4 k; P+ z! D
pearance of pubic hair, normal growth velocity, and
; I4 K2 l4 r: A% U: _decreased erections. The father admitted using a testos-
2 _ ]' I3 p7 z0 Y% p. t! `terone gel, which he concealed at first visit. He was) N ~! P: X9 u
using it rather frequently, twice a day. The Physicians’8 m" Z4 l3 w6 N+ L) p
Desk Reference, or package insert of this product, gel or. E( @$ P6 n- N& {- `3 l, G/ S, q
cream, cautions about dermal testosterone transfer to
7 K9 N% Z1 v+ {: N/ E/ ~4 v/ }/ `unprotected females through direct skin exposure.% d( d& }! P) v" f l
Serum testosterone level was found to be 2 times the2 W; O8 Q6 g! i; @9 v- Y
baseline value in those females who were exposed to, B4 E3 Z# o# }# s x* S
even 15 minutes of direct skin contact with their male- m( b$ A7 g7 l0 ~
partners.6 However, when a shirt covered the applica-
% Z5 M8 \2 m `+ E ]# k$ a1 Ption site, this testosterone transfer was prevented.
5 S2 D: T# |2 K- B: ?$ d/ C4 POur patient’s testosterone level was 60 ng/mL,
7 }* P8 ]- a/ q, F5 B" a0 Bwhich was clearly high. Some studies suggest that
$ D; b' z* M2 S7 ?. X, e% W" Bdermal conversion of testosterone to dihydrotestos-) o" _0 J7 S. k7 W, C$ _$ ^" E
terone, which is a more potent metabolite, is more& z& z2 m( T- Y# |4 O" c! \( s
active in young children exposed to testosterone
0 z5 B$ U$ r) e& O6 Z! q+ Nexogenously7; however, we did not measure a dihy- C! w1 e$ B% M# D( f/ N
drotestosterone level in our patient. In addition to
% Z* c% p0 f$ ^7 `& {' Q8 F7 e: Ovirilization, exposure to exogenous testosterone in
( x' I+ [5 q8 L, [( b! D* achildren results in an increase in growth velocity and/ V+ _; ^3 u% q" ]* k, }% p. r2 ?) F
advanced bone age, as seen in our patient.0 G2 z: @! z$ {6 i/ ^0 c* b) b2 H
The long-term effect of androgen exposure during
4 h3 H# }. I. X- f* A3 Rearly childhood on pubertal development and final
. I% g% W l: t6 F3 vadult height are not fully known and always remain( k9 _0 c, c0 \" N# M- U# d
a concern. Children treated with short-term testos-
" H# P- ]3 Q- H. t( bterone injection or topical androgen may exhibit some
( C) C, j- _0 {/ q9 Bacceleration of the skeletal maturation; however, after
( F F9 \9 f6 _ f: _cessation of treatment, the rate of bone maturation9 v/ `1 L8 k: B$ h* t& i
decelerates and gradually returns to normal.8,9' k" ^0 y4 ?6 [, l. d
There are conflicting reports and controversy) Y7 ^4 P# b& Z6 T* ?$ F: W
over the effect of early androgen exposure on adult1 n+ K2 Y/ \- s" y6 E7 o- [; [
penile length.10,11 Some reports suggest subnormal
2 j4 M# {8 q3 J) w4 @. Oadult penile length, apparently because of downreg-
6 Z8 m3 y! f: d( G) d! Kulation of androgen receptor number.10,12 However,
6 [) @$ q" e: _/ q- U7 ~Sutherland et al13 did not find a correlation between- [! m$ K. y% g2 L
childhood testosterone exposure and reduced adult
. b* ]. j' ]) J- N; xpenile length in clinical studies.4 U& p; W4 d3 }: g9 T( R& _
Nonetheless, we do not believe our patient is. M. x) ?% S" s
going to experience any of the untoward effects from
8 ^2 Q4 V1 g$ u/ v1 u8 Ztestosterone exposure as mentioned earlier because
/ S9 K9 Z8 a" t/ m3 @the exposure was not for a prolonged period of time.
% H. d, C/ o' N& s6 tAlthough the bone age was advanced at the time of
5 L& f1 B- ]$ m* cdiagnosis, the child had a normal growth velocity at& @! Y( _! R- ^0 u# U
the follow-up visit. It is hoped that his final adult+ ^( i5 f: }9 C0 [$ O& I/ c
height will not be affected.
. \1 Z7 O J6 i9 Z! L8 a1 ~5 aAlthough rarely reported, the widespread avail-; X) M" c4 x) C
ability of androgen products in our society may
8 g. ~' R! w* e! j; v2 Zindeed cause more virilization in male or female: h! {. |! e, R1 w
children than one would realize. Exposure to andro-
. I3 U- D2 {0 s$ V! \" p. Ygen products must be considered and specific ques-( Q3 D9 h7 F' |/ ]' n8 y3 y
tioning about the use of a testosterone product or8 s W) j& I: ?& v# N
gel should be asked of the family members during
5 A$ E( p( F- S3 P V, g$ nthe evaluation of any children who present with vir-+ X! q$ m" r4 Y) N
ilization or peripheral precocious puberty. The diag-- C+ N" g7 B" I1 h, d
nosis can be established by just a few tests and by2 H0 P' F! [, P, o
appropriate history. The inability to obtain such a* U( X5 T- T" |4 ?( r4 N
history, or failure to ask the specific questions, may( {- h L5 B" p( w4 B; c! B
result in extensive, unnecessary, and expensive! u2 W7 K4 h# \8 W4 s$ I5 X. [
investigation. The primary care physician should be7 H" ^+ m5 F9 A* ~
aware of this fact, because most of these children
' e' T# ^5 o" umay initially present in their practice. The Physicians’
: z$ w w* }4 rDesk Reference and package insert should also put a: E) X8 I: z# V/ ~
warning about the virilizing effect on a male or2 L( C! H% ^% v4 x4 ~4 }5 l
female child who might come in contact with some-
7 j: w, C1 d9 M9 f; \6 zone using any of these products.3 g; G* d: c& x6 G" ], j2 v( u0 ]
References! W; z/ I' E1 Z7 d$ e4 i* x
1. Styne DM. The testes: disorder of sexual differentiation1 Q' g* t% o& p4 i4 r4 ?
and puberty in the male. In: Sperling MA, ed. Pediatric
- w% ^2 w! ~5 m; g, I4 SEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
* K) L* O: Z, F2002: 565-628.+ G& R; N7 [. l4 U- g) j! ? B" _
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 c- Q0 n8 ?; X' v( W6 C
puberty in children with tumours of the suprasellar pineal
" _; X. r: x- Q& F; z9 zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
6 R h r8 }* b. G% LTopical Testosterone Exposure / Bhowmick et al 543
5 V9 g* _) j' _areas: organic central precocious puberty. Acta Paediatr./ q: _, z. k# ?, q! {" _$ _8 ]
2001;90:751-756.
4 i9 c6 F$ m6 }9 b ~3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
9 U- y" a# T0 N3 lPediatric Endocrinology. 4th ed. New York, NY: Marcel& u# p* W$ C9 @8 ]$ d4 r1 T
Dekker Inc; 2003:211-238.! q5 \9 R4 {. |# t8 i
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
$ s0 O# I6 j' @# ydevelopment in a two-year-old boy induced by topical
1 e" G* [7 |/ ~/ e# T, i0 Jexposure to testosterone. Pediatrics. 1999;104:e23.
' w, \2 z4 Z/ J5 I! i* c2 A5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
4 H' U$ F' t) Z5 v7 Z& XSkeletal Development of the Hand and Wrist. 2nd ed.
) O) @$ U h; d0 B/ H/ }Stanford, CA: Stanford University Press; 1959.
) v6 ~/ p! f0 I& y/ v* p6 q6. Physicians’ Desk Reference. Androgel 1% testosterone,
5 q' z$ q( A% q4 ZUnimed Pharmaceutical Inc. Montvale, NJ: Medical; ]% |- T% ] i& r; G$ O* j- \
Economics Company, Inc; 2004:3239-3241.( j, ^) ]8 R$ S( R0 ^8 }
7. Klugo RC, Cerny JC. Response of micropenis to topical
$ X' B+ _# s. k$ {+ Ltestosterone and gonadotropin. J Urol. 1978;119:: ~& Y* ]& l( B: A6 k# P! A) p3 l
667-668.
) t' V0 V: L! D. D2 }9 n8 R( g8. Guthrie RD, Smith DW, Graham CB. Testosterone$ ]+ y l2 ~7 F1 `
treatment for micropenis during early childhood. J Pediatr.
* C) h+ Z( \: e, U3 F1973;83:247-252.
1 w+ o c6 s2 ^8 E2 j, _9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone& t# U2 @4 L2 {- z; X
therapy for penile growth. Urol. 1975;6:708-710., w+ p. p9 e: f! _! ^, i$ b* O
10. Husmann DA, Cain MP. Microphallus: eventual phallic4 c" Q9 y3 F' X9 w( |! j
size is dependent on the timing of androgen administra-
8 F! y1 X/ V/ |5 Btion. J Urol. 1994;152:734-739.
7 v6 l: f5 T' c, q' a11. McMahon DR, Kramer SA, Husmann DA. Micropenis:4 Z8 O6 i) _* x* W. m
does early treatment with testosterone do more harm0 |; G( z" M# C, e8 g
than good? J Urol. 1995;154:825-829.+ s. z+ b% r2 c; V) v
12. Takane KK, George FW, Wilson JD. Androgen receptor5 ]: O6 X4 o8 a! \( ~; Y! E
of rat penis is down-regulated by androgen. Am J Physiol.: K' ~8 e5 t7 I% c8 w+ @- [
1990;258:E46-E50.
7 S6 F1 T5 h# j1 K$ j7 i13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
W6 F2 D# V5 H; G$ U8 ]% V8 t9 m. {of prepubertal androgen exposure on adult penile1 d: B" P7 Y6 n" H5 d: \: M
length. J Urol. 1996;156:783-787. |
|