- 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 _2 X2 G. A+ F; {1 s) |6 h
precocious puberty (CPP), which is mediated
% s- x+ A3 }& @9 K9 nthrough the hypothalamic pituitary gonadal axis, has
3 d0 V9 k8 t$ g. ha higher incidence of organic central nervous system
8 F% L5 q2 {2 N$ ?7 N; ]+ H( ~+ }' Clesions in boys.1,2 Virilization in boys, as manifested+ O c4 k) T; z! s6 L; i$ |; e8 B
by enlargement of the penis, development of pubic# d8 j* K* s. r u2 }9 R
hair, and facial acne without enlargement of testi-" C4 C/ w( q. j5 Y; t) K- }# V+ [
cles, suggests peripheral or pseudopuberty.1-3 We9 S/ S8 i3 {: I: D. d
report a 16-month-old boy who presented with the7 U+ w1 b3 @5 V$ p. Z7 H; {7 M
enlargement of the phallus and pubic hair develop-* C6 l# p4 W' m; f$ Z) F8 e: O6 J' C
ment without testicular enlargement, which was due
+ p2 g* o4 Y0 i1 b) q0 v# dto the unintentional exposure to androgen gel used by4 w" U4 [' Z; K+ J+ W K! |
the father. The family initially concealed this infor-
( m6 F5 n1 `9 m0 R; ]( Z$ ^4 f$ B* qmation, resulting in an extensive work-up for this3 |' r0 I" J+ s% e/ p, K/ [
child. Given the widespread and easy availability of
. a- a+ I+ |7 x( G$ d' rtestosterone gel and cream, we believe this is proba-
8 H' r$ Z0 C/ }( F" sbly more common than the rare case report in the+ p- u6 g/ o( l7 p
literature.4
! r& }/ k, k2 r" T9 Q7 Z4 sPatient Report& k8 W. o4 A3 O3 O1 A: u
A 16-month-old white child was referred to the; d9 z+ w/ _' \/ Q5 O
endocrine clinic by his pediatrician with the concern* h" G* Q% H2 R2 ~; J- Z
of early sexual development. His mother noticed' U, J. y3 o! {+ c+ q) r! G/ F" U
light colored pubic hair development when he was9 p4 S( }/ v% `- V
From the 1Division of Pediatric Endocrinology, 2University of3 J6 ~+ v; r& G% O8 M
South Alabama Medical Center, Mobile, Alabama. s$ g" }2 O$ b" `
Address correspondence to: Samar K. Bhowmick, MD, FACE,% m9 \) i$ h6 v- U
Professor of Pediatrics, University of South Alabama, College of
6 G6 g5 D# G5 T7 C& h0 ZMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297; S( |9 N; D! x B( P$ J9 G
e-mail: [email protected].
3 M9 y( J! `; }$ u' ~% Z7 w% labout 6 to 7 months old, which progressively became
% F9 e% U% K' Y) B+ Y' Tdarker. She was also concerned about the enlarge-( J$ C% S3 D6 }. t1 W$ X% U9 q/ W
ment of his penis and frequent erections. The child
' _/ R' \. ~( I0 b: O' Pwas the product of a full-term normal delivery, with& a& w0 t. M; a. p
a birth weight of 7 lb 14 oz, and birth length of
& u2 K, A) Z$ o6 K& }% I P; p/ K20 inches. He was breast-fed throughout the first year
2 n. ~2 N; V9 J: ~of life and was still receiving breast milk along with
# y, m N! h$ d! V) ]solid food. He had no hospitalizations or surgery,
* G" Q( m/ i5 B2 q) cand his psychosocial and psychomotor development7 d, D& Q# b- H8 P# H% F
was age appropriate.
* D0 B1 {$ e! ZThe family history was remarkable for the father,0 Y9 @7 H; i X1 X5 ]* j% y4 ?' `
who was diagnosed with hypothyroidism at age 16,( o% Y, u+ G* `5 q
which was treated with thyroxine. The father’s
% a0 k4 ~$ w9 W8 t0 P. dheight was 6 feet, and he went through a somewhat/ b, @0 R4 c9 b, b) x) a2 r' a
early puberty and had stopped growing by age 14.
& N2 M! T, @% \" L0 ~7 @ WThe father denied taking any other medication. The& b! u" w( h3 o, b
child’s mother was in good health. Her menarche' q; T! T! o# |# E( o
was at 11 years of age, and her height was at 5 feet0 F& @( d1 w2 s% Z2 o( z
5 inches. There was no other family history of pre-
9 m* l' q7 Y- x" S" I3 @3 J9 x9 dcocious sexual development in the first-degree rela-
! D! y0 ?2 p& L3 E$ Otives. There were no siblings.7 R9 X- F: {- ]8 F5 S
Physical Examination x- L1 u5 i8 K6 H0 ~* \
The physical examination revealed a very active,& t, n/ V0 w( u: ^$ P% ]
playful, and healthy boy. The vital signs documented
/ G( Y2 V$ n; k. ^& C# ya blood pressure of 85/50 mm Hg, his length was5 Y+ _( ?1 S, T
90 cm (>97th percentile), and his weight was 14.4 kg0 ~$ M7 T5 @! Y: R3 n& ]4 O" g7 E& P
(also >97th percentile). The observed yearly growth$ o9 Z: N& O- b% J8 V) J
velocity was 30 cm (12 inches). The examination of* z( [$ t5 e+ {3 @9 T* y; q( p
the neck revealed no thyroid enlargement.
# R* X" Y# h1 ^& B) T& a0 xThe genitourinary examination was remarkable for5 t( Z( b6 R) @7 T1 f( f; l
enlargement of the penis, with a stretched length of
% O q& H. \) b. D" M8 cm and a width of 2 cm. The glans penis was very well
# d) H! u4 H% M( e g5 F' u9 ydeveloped. The pubic hair was Tanner II, mostly around
% w N- S: k+ [9 T# D' E- P/ L% E0 {540
N) L/ e4 w6 w# \at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 n& h# N; P {3 N0 D( w1 w) [the base of the phallus and was dark and curled. The
1 f* H5 j+ E3 f3 ktesticular volume was prepubertal at 2 mL each.
, A+ d1 ?" Q% r- k5 W0 J% xThe skin was moist and smooth and somewhat: N- a; }3 y R# _" L
oily. No axillary hair was noted. There were no7 k9 N% b T! s
abnormal skin pigmentations or café-au-lait spots.
2 W, C# {4 R% u3 a2 [1 u% M2 ENeurologic evaluation showed deep tendon reflex 2+- V, _# z" G4 A
bilateral and symmetrical. There was no suggestion# c! h1 E9 n: J( }3 T" I% z
of papilledema.
3 ~2 l/ W9 \ I6 iLaboratory Evaluation* C# V6 n; A+ E8 b L7 p/ P' p! ~
The bone age was consistent with 28 months by/ ]- G" Q. i% X
using the standard of Greulich and Pyle at a chrono- Z- B! @! F; D5 e
logic age of 16 months (advanced).5 Chromosomal
6 @7 z% [5 o! _! R, F$ ^' _karyotype was 46XY. The thyroid function test
5 R) E( C8 g0 zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
) R, {& U& o' V+ m5 E, J1 q; Llating hormone level was 1.3 µIU/mL (both normal).
6 U1 b2 z6 r3 r; [The concentrations of serum electrolytes, blood
( F' s- z; K" A$ Y1 o9 aurea nitrogen, creatinine, and calcium all were5 @. ~9 j! Z7 v2 J
within normal range for his age. The concentration( ?5 c) t" Z+ u7 R; R
of serum 17-hydroxyprogesterone was 16 ng/dL; n/ G9 M; o7 i) q$ T: D$ ~
(normal, 3 to 90 ng/dL), androstenedione was 20" z, O6 P0 M% d, p% d) ?
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
" b* k6 R) g0 e( ]( W" Jterone was 38 ng/dL (normal, 50 to 760 ng/dL),# i. E4 Y, U+ }1 i, ?4 _, f: X
desoxycorticosterone was 4.3 ng/dL (normal, 7 to/ B% p, A' z# p, B
49ng/dL), 11-desoxycortisol (specific compound S)/ _* b2 V7 R# H7 n! Y' b# }
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
0 b0 R4 Y% X5 d* ztisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
$ P) Z# n2 W$ i( Ptestosterone was 60 ng/dL (normal <3 to 10 ng/dL),/ g6 A z2 D0 P7 d3 [0 ]
and β-human chorionic gonadotropin was less than
$ q8 u( K- \( V. t* ~5 mIU/mL (normal <5 mIU/mL). Serum follicular( I% U3 e; M. V! i9 ]
stimulating hormone and leuteinizing hormone; E6 Y0 L" v! _' j! w
concentrations were less than 0.05 mIU/mL* |- G9 |( @/ d) h0 p; q
(prepubertal).
9 `0 ^# V; m" I3 W9 W8 r8 uThe parents were notified about the laboratory
! r7 B0 l7 e+ s4 W0 Q, u9 oresults and were informed that all of the tests were
" Y, D$ q" m! V, j' N1 ]! k( o' rnormal except the testosterone level was high. The
+ W2 v( i+ Q* J& b/ \$ t( c- @follow-up visit was arranged within a few weeks to
; x6 ^% T7 l; Z* Robtain testicular and abdominal sonograms; how-
" N, t- Z* z4 e! F9 a9 ?ever, the family did not return for 4 months.% M- T; ~6 r- ~! q! v3 i
Physical examination at this time revealed that the
( l7 m7 ?- Y4 d! ?# H8 O! F& Uchild had grown 2.5 cm in 4 months and had gained Q0 E% ?8 A0 z1 j3 b8 g- o: J, q
2 kg of weight. Physical examination remained
A4 d! J% g x% n( C* munchanged. Surprisingly, the pubic hair almost com-
* @& X2 E& T @4 e3 a f4 npletely disappeared except for a few vellous hairs at
j" H! A5 q! w1 x+ W) Qthe base of the phallus. Testicular volume was still 2# w7 c. W! j5 a6 w; Y
mL, and the size of the penis remained unchanged.! S6 a/ w. } J% C
The mother also said that the boy was no longer hav-
( T* F; `3 ?; ?- R' ~; V, _/ A, j7 ging frequent erections.
7 d T* W. N1 d2 u3 b' I. bBoth parents were again questioned about use of. X# b* l a2 M( v! R
any ointment/creams that they may have applied to
& p1 m4 {2 A4 g$ Vthe child’s skin. This time the father admitted the
0 I( K9 E6 j: d7 I: ~6 vTopical Testosterone Exposure / Bhowmick et al 541 i6 _& G/ X1 O$ ]) \$ y
use of testosterone gel twice daily that he was apply-7 S7 y8 n' k8 ~1 }
ing over his own shoulders, chest, and back area for
7 g' V$ k- l F7 `+ _* @a year. The father also revealed he was embarrassed
- @, w7 A6 C" x; Q# _4 N1 Vto disclose that he was using a testosterone gel pre-
% K a& t# Y! \+ \" R# E" w pscribed by his family physician for decreased libido5 V" z2 }% b% \
secondary to depression.
, x' i: P( m Y7 x9 ZThe child slept in the same bed with parents.
5 Z+ Q1 n' v$ [8 ^0 o( I" t R- GThe father would hug the baby and hold him on his
& i. O* r' |( D& j2 Y8 Kchest for a considerable period of time, causing sig-8 W" ]/ M3 A) }5 z6 [. L- a/ _! Q
nificant bare skin contact between baby and father.
5 T$ i) Q' _3 y- g7 B- |6 DThe father also admitted that after the phone call,5 z, n/ y0 w/ G
when he learned the testosterone level in the baby# e+ R1 k, } L# G0 L& O
was high, he then read the product information
7 N+ {0 w. y. V. Opacket and concluded that it was most likely the rea-
2 r& F0 M. z; o) Gson for the child’s virilization. At that time, they7 Q, p; F0 q! H. H
decided to put the baby in a separate bed, and the: g, k. e7 g1 r- {
father was not hugging him with bare skin and had
( ?2 B1 P# `8 t u- V9 R8 Pbeen using protective clothing. A repeat testosterone9 L* v! P, B# U- U7 |3 K3 M) \
test was ordered, but the family did not go to the
E! |7 t. Y9 n- D% [laboratory to obtain the test.
' M9 J( P$ }; c, N5 b6 tDiscussion6 w) d- x3 t6 Z: Z9 z* I* n9 e
Precocious puberty in boys is defined as secondary
. ?0 o' ], x' k4 E2 Jsexual development before 9 years of age.1,47 E( @8 H9 l: i* [
Precocious puberty is termed as central (true) when, m4 W9 B7 ~$ v4 T' e4 H9 T
it is caused by the premature activation of hypo-
& b% x* o' a4 z# x' ythalamic pituitary gonadal axis. CPP is more com-
$ S8 i7 ?; u4 y$ R8 M5 x* w2 jmon in girls than in boys.1,3 Most boys with CPP
3 y! t: [+ _7 H' N; tmay have a central nervous system lesion that is3 f3 z) O; o% J/ G/ }: n9 [3 P
responsible for the early activation of the hypothal-0 d5 Z# p, Q) M, f
amic pituitary gonadal axis.1-3 Thus, greater empha-
5 S1 `7 q# g! a1 r8 ysis has been given to neuroradiologic imaging in
" e- M2 m* G5 q% {- u/ Eboys with precocious puberty. In addition to viril-
! I5 k& ~- D* ?& m9 B- Q6 Q7 f5 aization, the clinical hallmark of CPP is the symmet-% p' J/ ~$ N9 B/ s" ]$ r' q- O
rical testicular growth secondary to stimulation by
5 H! o; e5 g5 {9 Fgonadotropins.1,3& K7 F" l& g4 Y) m, ]3 h# `0 i) ~
Gonadotropin-independent peripheral preco-
# Y2 }5 Z- I( e% N7 Wcious puberty in boys also results from inappropriate
5 r3 Q0 K) y5 K! jandrogenic stimulation from either endogenous or. X0 T' e: t# w; h
exogenous sources, nonpituitary gonadotropin stim-
. W. s* h- i& L+ K8 l6 lulation, and rare activating mutations.3 Virilizing
9 P6 H) D8 F F* `congenital adrenal hyperplasia producing excessive' G: P/ I$ F. K6 y8 Z
adrenal androgens is a common cause of precocious
& ^6 L+ w4 M/ i0 r4 u6 m' l' b6 Epuberty in boys.3,4+ K0 m% O3 k$ h4 D- o2 K
The most common form of congenital adrenal1 q' u/ v! h2 G4 _, `1 m
hyperplasia is the 21-hydroxylase enzyme deficiency.
, H5 H4 f, @. Z- D2 t4 h9 FThe 11-β hydroxylase deficiency may also result in% J+ z8 b- q0 _7 O7 l
excessive adrenal androgen production, and rarely,5 h# ?8 V$ i! k! i& R" k
an adrenal tumor may also cause adrenal androgen7 P' z0 a8 x$ Z* O: J. a$ y( e
excess.1,3
9 H$ E$ u3 N% A5 Q& B/ Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 `# y; \; f- E( t& k
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
% y5 }9 e: s/ w! p2 YA unique entity of male-limited gonadotropin-& Q3 R( T7 o2 y; t0 O% s
independent precocious puberty, which is also known
4 l( {4 V; @# }as testotoxicosis, may cause precocious puberty at a9 f6 r V: |8 ?: Q6 _6 Q
very young age. The physical findings in these boys. }5 {% w! D2 \
with this disorder are full pubertal development,
- W1 i3 l* B3 O' l8 U3 yincluding bilateral testicular growth, similar to boys6 e( g. f/ O' Y6 K" _, W! F
with CPP. The gonadotropin levels in this disorder
. Q2 J# _3 Y; ]' |, @are suppressed to prepubertal levels and do not show
; a& P9 R$ ]" C7 Spubertal response of gonadotropin after gonadotropin-. p: v8 q) t# [/ m' ]
releasing hormone stimulation. This is a sex-linked; I N$ N2 p! o: }5 K g
autosomal dominant disorder that affects only
* I3 [- \7 W2 b3 p; C$ Q9 emales; therefore, other male members of the family
% t6 U, D! U% l- V, P5 \may have similar precocious puberty.3% J" a5 {6 j' P; S3 i7 q' O
In our patient, physical examination was incon-, v" Y4 d$ o, l
sistent with true precocious puberty since his testi-
3 }- @$ X9 S6 I/ d% Y3 _3 jcles were prepubertal in size. However, testotoxicosis
8 o+ ^: }! [( @ Gwas in the differential diagnosis because his father
5 }1 b3 x" ~1 Z* a- wstarted puberty somewhat early, and occasionally,) M, w9 s6 x9 P/ ]) i% `
testicular enlargement is not that evident in the( ~7 o a g6 o8 F* T
beginning of this process.1 In the absence of a neg-
4 N4 B8 J1 S) n/ O. D( }" k4 h* I$ sative initial history of androgen exposure, our3 d3 T, ~8 q- a
biggest concern was virilizing adrenal hyperplasia,
+ Y, C" G. z, i: E, Geither 21-hydroxylase deficiency or 11-β hydroxylase
8 Y# H2 l& B3 I) w0 W$ Gdeficiency. Those diagnoses were excluded by find-
% n: Z6 u& o) p3 ping the normal level of adrenal steroids.
+ U8 C$ I% K7 GThe diagnosis of exogenous androgens was strongly
' x. d6 Y% B: T1 P9 f1 dsuspected in a follow-up visit after 4 months because
: [4 P& m N p. y& D3 V/ Ythe physical examination revealed the complete disap-
' g# a. @5 H" J5 q, Kpearance of pubic hair, normal growth velocity, and$ n3 i6 u8 T6 J, m2 X* b' V/ `
decreased erections. The father admitted using a testos-
8 p, e" r* G) u L" ^6 }' h$ rterone gel, which he concealed at first visit. He was4 U* Z! s1 y4 k
using it rather frequently, twice a day. The Physicians’( v( Y4 [* I$ L
Desk Reference, or package insert of this product, gel or
/ B% X+ S7 M/ e+ f# l- u6 K& Ucream, cautions about dermal testosterone transfer to
' y* Z" ^8 x2 s9 z7 b: Munprotected females through direct skin exposure.
' O1 H) ?; T; JSerum testosterone level was found to be 2 times the7 D4 l" F9 t0 l3 S" c5 [8 ?
baseline value in those females who were exposed to. E2 g! z( O2 [' V( M7 x0 S
even 15 minutes of direct skin contact with their male" E" [: i& B1 G! C+ I7 a' p- @
partners.6 However, when a shirt covered the applica-
3 Z2 |2 K- | i0 |1 T7 Y" Vtion site, this testosterone transfer was prevented.
- ^- U9 e! @, ?Our patient’s testosterone level was 60 ng/mL,) K) v/ w4 E% }, y# ^ O
which was clearly high. Some studies suggest that$ m# o5 i3 n2 Y/ o4 ~& e0 q
dermal conversion of testosterone to dihydrotestos-0 J2 n7 h( G4 Y5 c& Y
terone, which is a more potent metabolite, is more
0 J+ |, q( A- Pactive in young children exposed to testosterone9 o2 N L3 o v: N. B
exogenously7; however, we did not measure a dihy-
0 U( t; y+ \' G# F8 |( M3 U' [" |drotestosterone level in our patient. In addition to) F+ K$ ]' S! _3 ^4 I' i& i
virilization, exposure to exogenous testosterone in
8 t, l% l5 @" Q% r' ?& t, Rchildren results in an increase in growth velocity and
+ O* ]8 B4 E7 Z& V+ o3 U4 Padvanced bone age, as seen in our patient.! F0 O0 Q( d* h7 X" l( G; o/ V
The long-term effect of androgen exposure during- l( U4 `8 Z& H
early childhood on pubertal development and final
7 l9 R/ A& ] o4 z! ?: oadult height are not fully known and always remain' i4 S2 Y3 W8 m+ `
a concern. Children treated with short-term testos-
8 E: c7 a2 |& D+ F hterone injection or topical androgen may exhibit some
( d: ?/ W6 q1 @ lacceleration of the skeletal maturation; however, after7 F' a5 ~1 m) W0 d6 \. c' A
cessation of treatment, the rate of bone maturation: j: S$ c' o- }
decelerates and gradually returns to normal.8,94 n2 Q& q* a& m( ]" L
There are conflicting reports and controversy0 D1 S5 v. s. A( V% B/ N% |
over the effect of early androgen exposure on adult8 f2 L$ X, V0 V1 o% D6 t
penile length.10,11 Some reports suggest subnormal7 l# Z& S% N* r, a3 j' ^4 R
adult penile length, apparently because of downreg-
0 }4 n' `0 r9 ] }0 D5 oulation of androgen receptor number.10,12 However,
( {, ?& o0 \! N2 dSutherland et al13 did not find a correlation between7 e1 w& Y- ?2 m" }' b5 g
childhood testosterone exposure and reduced adult
4 o' c# Z {4 npenile length in clinical studies.
" {. ~+ y+ h$ o& O8 YNonetheless, we do not believe our patient is' P: |/ b# a6 \4 c
going to experience any of the untoward effects from
) l$ ^/ J. \% w0 d3 Ytestosterone exposure as mentioned earlier because6 ~/ X" q+ ~/ y0 o
the exposure was not for a prolonged period of time.; k8 J" r( \" N$ M- z5 L
Although the bone age was advanced at the time of X1 i1 ^( u+ Q+ A h" W0 K# z& i
diagnosis, the child had a normal growth velocity at
5 |6 v8 a3 f$ ], [: m* vthe follow-up visit. It is hoped that his final adult
3 q. b: c+ v5 |4 t8 V. sheight will not be affected.
: P, k8 U3 E( f. v3 sAlthough rarely reported, the widespread avail-7 j2 |# b3 D7 i8 h% ?
ability of androgen products in our society may
' |1 W8 C# ^; M! [' Hindeed cause more virilization in male or female
! I' h6 I; z( `7 W; |- Tchildren than one would realize. Exposure to andro-$ V$ T i4 K- o
gen products must be considered and specific ques-
0 u3 R- Q& v. v0 B0 Q4 G; [! l6 U6 L4 Ptioning about the use of a testosterone product or& w/ S5 t. s. |5 n0 c9 n! g# {
gel should be asked of the family members during
, n, e \0 ^( M' dthe evaluation of any children who present with vir-
# A6 m' M1 d: h T- w0 Qilization or peripheral precocious puberty. The diag-
, c3 B/ {( M* s/ J' W( j5 i/ Snosis can be established by just a few tests and by9 |1 {6 {1 l& K
appropriate history. The inability to obtain such a
1 f3 ^4 Y' q% d8 Y: D) I0 u- ahistory, or failure to ask the specific questions, may" E" M$ ~0 v9 @! y2 v+ z" m
result in extensive, unnecessary, and expensive" W/ L) J' ~# l
investigation. The primary care physician should be
1 N! y; j7 u( n3 y7 Caware of this fact, because most of these children) k$ q2 s6 i% |3 X4 ?9 i/ z- T8 v# p
may initially present in their practice. The Physicians’
7 ?) h! g9 ^5 VDesk Reference and package insert should also put a! \5 A- c, j% x$ ]# E0 B
warning about the virilizing effect on a male or. J7 r$ K7 [) q! r; |/ u( ?1 |6 A
female child who might come in contact with some-/ t9 R4 o- V% y$ @0 a: \
one using any of these products.
" u4 G5 Z& j7 N( V8 dReferences
9 [5 m. g2 q; J3 l; I- I$ z1. Styne DM. The testes: disorder of sexual differentiation
, q: G7 \4 d+ X6 `and puberty in the male. In: Sperling MA, ed. Pediatric5 E) V8 Z2 `$ Z0 }" L6 \+ ?
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
2 n6 ~: c9 M& z1 ?7 d( h2002: 565-628.+ e3 r, T/ q6 T6 _) ^0 }9 G8 W$ H
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious2 `+ m+ A6 k- ?( e- R
puberty in children with tumours of the suprasellar pineal
4 b7 N/ h$ J) D! Q: N8 Nat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ Y( |: ]9 q( gTopical Testosterone Exposure / Bhowmick et al 543
- `( K# ?- h$ |% V( A/ n( s* Lareas: organic central precocious puberty. Acta Paediatr.. A( x( t" r! X y. B) [: P
2001;90:751-756.
3 w6 i) X/ P# I, k3 |' t/ y1 ?3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
, s- g p! V( W! t; h/ f+ d3 h7 IPediatric Endocrinology. 4th ed. New York, NY: Marcel
; t1 G+ O) C$ Y0 kDekker Inc; 2003:211-238.# d+ Q7 _* c" }! Q' |. I0 k
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual8 V/ \. s4 q5 h& D
development in a two-year-old boy induced by topical) ?" b* X5 \$ Z: q
exposure to testosterone. Pediatrics. 1999;104:e23.
1 j$ L1 o8 R6 V1 f! Y! w5. Greulich WW, Pyle SI, eds. Radiographic Atlas of5 q$ K7 @6 e4 u# A- v$ a
Skeletal Development of the Hand and Wrist. 2nd ed.& L* y1 x* F% S" m- ~7 e8 [
Stanford, CA: Stanford University Press; 1959.
- s6 t, Y$ r' A. d2 O7 N: O6. Physicians’ Desk Reference. Androgel 1% testosterone,# V7 ]! \3 b) Q- X
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
) A1 p( X0 I: @! [' REconomics Company, Inc; 2004:3239-3241.
& p: P0 W- N+ M2 _' K$ @7. Klugo RC, Cerny JC. Response of micropenis to topical
- P* w: x3 F7 L. u, V2 S! o4 n7 R4 Ftestosterone and gonadotropin. J Urol. 1978;119:9 m P! K0 e G2 m( l
667-668.
: Z1 [* e, n) V8. Guthrie RD, Smith DW, Graham CB. Testosterone
0 k s3 I2 D6 K( J7 h1 B$ i' x% V4 D- Atreatment for micropenis during early childhood. J Pediatr.0 F! w/ [8 D, q% l0 E
1973;83:247-252.. U' ?( |/ h; e9 Y
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone! }4 J+ c _$ @+ O, W
therapy for penile growth. Urol. 1975;6:708-710.
% r% S f2 q" M/ V) E10. Husmann DA, Cain MP. Microphallus: eventual phallic
$ G8 c2 `& ~3 T9 F7 @' N& i* k3 Gsize is dependent on the timing of androgen administra-
# {4 U9 I! z/ i1 [5 ction. J Urol. 1994;152:734-739.7 m) A' n9 ^' K6 S5 Z8 ~4 g, c# F
11. McMahon DR, Kramer SA, Husmann DA. Micropenis: L8 S3 P) X" K1 \5 C5 ^
does early treatment with testosterone do more harm% h) d% @" y+ _. d
than good? J Urol. 1995;154:825-829.
3 Y! W6 @+ c0 X+ y; Y12. Takane KK, George FW, Wilson JD. Androgen receptor2 Q6 h. ]" r$ X
of rat penis is down-regulated by androgen. Am J Physiol.0 C7 ` ?, m, s; e1 `6 s
1990;258:E46-E50.' Z* C* [8 f3 [
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect: q% W4 Q) n, }4 {& a0 C; n
of prepubertal androgen exposure on adult penile
( y8 e: {! y, Y6 ~length. J Urol. 1996;156:783-787. |
|