- 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) W+ U/ \6 T& T) ~& r& h0 K7 q* [0 H
precocious puberty (CPP), which is mediated
* f: z: ]* _5 M0 Y% H# [through the hypothalamic pituitary gonadal axis, has" e- _! N7 c) ~+ l1 k1 k
a higher incidence of organic central nervous system# M* u3 V% q( x! Z
lesions in boys.1,2 Virilization in boys, as manifested8 R6 T$ Y4 x: l# X( f
by enlargement of the penis, development of pubic5 g/ E9 L: I4 s- ` t9 w
hair, and facial acne without enlargement of testi-
; f) `& M Q2 s& t: D2 bcles, suggests peripheral or pseudopuberty.1-3 We
& z* F) G% i, Xreport a 16-month-old boy who presented with the: N5 m% l# N) p8 V/ }
enlargement of the phallus and pubic hair develop-
Q: h8 J) D' ^ A9 [4 q6 Pment without testicular enlargement, which was due
Z2 I- \- h! {* Z% |) Ito the unintentional exposure to androgen gel used by) Z0 d! v# |" l: a) l/ X
the father. The family initially concealed this infor-" w" J9 }' H; R) S% y& {8 i
mation, resulting in an extensive work-up for this8 F9 \" P# s& R8 h
child. Given the widespread and easy availability of- Z3 ^6 M6 | p! x' i
testosterone gel and cream, we believe this is proba-% f% R$ A! ]! H7 O- x
bly more common than the rare case report in the' L/ p& @& O6 l9 d! k3 m9 U
literature.4
+ R# _3 ]& G# j( QPatient Report
# Q8 O$ S* {! v% o" [; F- \A 16-month-old white child was referred to the* Z0 g* g) I# G& |
endocrine clinic by his pediatrician with the concern
: V2 h& m: \; }3 oof early sexual development. His mother noticed
8 Z2 W1 }7 o' clight colored pubic hair development when he was4 a1 `* W/ b* p, t% \; ?: N) _; s
From the 1Division of Pediatric Endocrinology, 2University of
- [1 |; B4 |" W WSouth Alabama Medical Center, Mobile, Alabama.- A7 `% |3 N5 L" Q# d# ]1 |# {
Address correspondence to: Samar K. Bhowmick, MD, FACE,
2 N6 m v* s4 h% |9 [. [Professor of Pediatrics, University of South Alabama, College of) {/ U. u; D( E) g: a5 J
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
; G" R+ v6 J- A' Re-mail: [email protected].
4 Z4 ?# m4 I0 W7 V! labout 6 to 7 months old, which progressively became9 q& p3 _# s5 p, C
darker. She was also concerned about the enlarge-# g3 ?2 i, N" \
ment of his penis and frequent erections. The child
1 g$ Z5 a$ X( n' o+ swas the product of a full-term normal delivery, with. D% a& k7 l' ~, w& @
a birth weight of 7 lb 14 oz, and birth length of
& ]. Q, O- M( C" p% x# ~ }4 q" I20 inches. He was breast-fed throughout the first year
6 \8 K. G6 p n7 d/ y# w6 [% ~of life and was still receiving breast milk along with9 V0 h* i1 F$ C+ r
solid food. He had no hospitalizations or surgery,! X- Z- Y y; S
and his psychosocial and psychomotor development; S' K& E+ v; v8 ]5 t
was age appropriate.
. z9 ?9 F( t0 n0 e, D0 x( _The family history was remarkable for the father,0 b2 j$ a# r& z3 n
who was diagnosed with hypothyroidism at age 16, x- X0 G5 `7 T# ]) K G
which was treated with thyroxine. The father’s# z7 c/ V% o8 }) w& G9 ]3 @
height was 6 feet, and he went through a somewhat' C, K/ A9 H3 G T' I5 F/ R" Q
early puberty and had stopped growing by age 14.
. f' n3 k3 B& t/ B- uThe father denied taking any other medication. The% b5 K, f+ n# f% h7 @& B$ ]0 Y
child’s mother was in good health. Her menarche
: g( N; F% y4 Y6 ^! E( \; o' Xwas at 11 years of age, and her height was at 5 feet
c5 j$ ~1 ^7 V$ ^6 N& @9 z1 O( h5 inches. There was no other family history of pre-
' y6 W4 q9 z, A; j# K# fcocious sexual development in the first-degree rela-* `% n* N& T7 ]* ?
tives. There were no siblings.8 R1 e0 j' X% J3 ~, O
Physical Examination
# l" w3 i: ^. l0 C- uThe physical examination revealed a very active,# v! p, c8 I0 H; x$ c F( M1 j* `' W
playful, and healthy boy. The vital signs documented" B# e) t; r4 d
a blood pressure of 85/50 mm Hg, his length was1 {4 | J9 B* j
90 cm (>97th percentile), and his weight was 14.4 kg
* H% }3 V, L% x3 c; R. p5 K(also >97th percentile). The observed yearly growth
" R3 W& Y& x' qvelocity was 30 cm (12 inches). The examination of& V+ Y$ ` O, M
the neck revealed no thyroid enlargement.9 k! ~/ D$ h: e; [, W+ F- ]
The genitourinary examination was remarkable for
9 A1 D, _- R5 B& E$ Henlargement of the penis, with a stretched length of9 J. r+ d9 r( y9 R" U% ^/ D
8 cm and a width of 2 cm. The glans penis was very well
2 m; U' e1 f$ }1 _developed. The pubic hair was Tanner II, mostly around
" O5 u4 C5 r6 L+ g1 d0 R5408 N! ]+ B* z) Y- E+ [
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. f" Y5 ~) ] F5 O" [( C I+ }the base of the phallus and was dark and curled. The
' S4 U7 N) O) ]2 u6 G' ~5 Dtesticular volume was prepubertal at 2 mL each.
) z- s; Z( N6 R$ _ Z$ BThe skin was moist and smooth and somewhat) Z- P9 A# A6 F
oily. No axillary hair was noted. There were no
' i, x( h ^/ G/ |5 U( ` \7 ]abnormal skin pigmentations or café-au-lait spots.
9 e+ M1 i2 I5 I. U% S2 i( p$ O0 p ~Neurologic evaluation showed deep tendon reflex 2+0 c+ n/ k& ]! m+ F0 e, y5 G
bilateral and symmetrical. There was no suggestion
8 b" \# w% E- k& c: H5 i6 oof papilledema.0 h2 u0 |- _3 q6 m" i
Laboratory Evaluation- \" I! F1 v0 B" d; O! \3 S
The bone age was consistent with 28 months by% Y5 n( w/ n; N6 T
using the standard of Greulich and Pyle at a chrono-) D$ w2 T: y! D$ q( S
logic age of 16 months (advanced).5 Chromosomal
2 n: n, q* }1 [ u3 C# \karyotype was 46XY. The thyroid function test
( X# J+ R, ]" |% M; ^! a" Lshowed a free T4 of 1.69 ng/dL, and thyroid stimu-4 b, d/ D/ x! `1 C
lating hormone level was 1.3 µIU/mL (both normal).3 \5 c3 M% e. l5 p
The concentrations of serum electrolytes, blood3 C4 @% ~3 d2 Z; ~4 p. Y8 Q0 K
urea nitrogen, creatinine, and calcium all were# N8 p! Y! U0 d4 ^1 j
within normal range for his age. The concentration4 n- L8 K4 S, O. e2 u
of serum 17-hydroxyprogesterone was 16 ng/dL9 F+ @. ~% @9 }" _( ?
(normal, 3 to 90 ng/dL), androstenedione was 20* b5 o# M) {# \$ ?: Y0 d8 _) w
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
( k% s( d& q8 r' Z' bterone was 38 ng/dL (normal, 50 to 760 ng/dL),, B/ t3 T7 }8 A( ~8 J# v! ^
desoxycorticosterone was 4.3 ng/dL (normal, 7 to/ Z/ Z1 m1 }9 _- E6 r" I
49ng/dL), 11-desoxycortisol (specific compound S)
* E& d/ V n( C3 @, X' ?' C& Jwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-: x% n9 `3 P% y, L8 z- _/ U
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
$ G j- D U& k l& d7 u1 Xtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),( @- x1 s$ z2 d0 m4 Q; b2 M: p4 c: V' Z
and β-human chorionic gonadotropin was less than: w. ]+ q7 E9 l; G3 Y& @
5 mIU/mL (normal <5 mIU/mL). Serum follicular5 y4 {% K* Y2 h$ B# B7 W
stimulating hormone and leuteinizing hormone/ y" {- ~0 r3 \% J8 I5 U
concentrations were less than 0.05 mIU/mL
8 O( x& g' i' j* b* h$ q(prepubertal).3 b0 z% f5 B) _$ c/ E/ l
The parents were notified about the laboratory
8 Q$ }5 ~ N. w2 X& O& x* oresults and were informed that all of the tests were3 I/ s5 Q7 B- X( B0 G( Q7 T& U
normal except the testosterone level was high. The
" I7 L8 \% f9 K/ p: N3 K7 i( ffollow-up visit was arranged within a few weeks to& ~! B% h7 A. X" `! }
obtain testicular and abdominal sonograms; how-# b. c! X3 S, C7 n3 `
ever, the family did not return for 4 months.
6 n/ b. F# X( D4 yPhysical examination at this time revealed that the/ H8 {0 G7 S6 d8 ?1 k9 \
child had grown 2.5 cm in 4 months and had gained
3 |# L' @, X8 u' X4 p- ^2 kg of weight. Physical examination remained
3 }* k2 p3 l. M3 x8 `1 }unchanged. Surprisingly, the pubic hair almost com-. r/ f5 b9 O5 G- K) T
pletely disappeared except for a few vellous hairs at
# c/ ~3 C& x' r+ g3 q- u y% U1 Ithe base of the phallus. Testicular volume was still 2- G! b2 v- `+ [5 m
mL, and the size of the penis remained unchanged./ h/ p$ I: _0 O, m* f7 m
The mother also said that the boy was no longer hav-
2 B. T5 d4 _$ n" Y" V- z# E1 |ing frequent erections.
( K( }) U1 n ~8 }Both parents were again questioned about use of: L+ G8 `" t, }. F: Z! [4 C# N
any ointment/creams that they may have applied to8 i* z( B2 e5 @6 t- @" t% U1 C& u' D& d
the child’s skin. This time the father admitted the2 P& ~6 \/ Y' l5 [6 {
Topical Testosterone Exposure / Bhowmick et al 541
8 `1 E' x7 x+ }& guse of testosterone gel twice daily that he was apply-
' p3 Z0 }" C0 Z, a: t+ ]ing over his own shoulders, chest, and back area for
# N0 D6 f" _1 u {$ c0 sa year. The father also revealed he was embarrassed
& P* C& P9 G/ W% F7 fto disclose that he was using a testosterone gel pre-
! V. T$ P$ o" p" Y& \* }scribed by his family physician for decreased libido
3 C5 m2 L0 S' j* Y( J6 Gsecondary to depression.
. ?, W8 Q) z+ Q6 ]0 B! k# OThe child slept in the same bed with parents.) _6 Z( d/ b5 \
The father would hug the baby and hold him on his
# b7 K! i8 X4 vchest for a considerable period of time, causing sig-
; L& `- s$ {- |# w# U3 inificant bare skin contact between baby and father.- m; j/ j8 _! ~
The father also admitted that after the phone call,
" H: t5 V$ P# O+ N' J0 P$ Uwhen he learned the testosterone level in the baby
+ i g1 H0 W* M( ]( h+ L- Ywas high, he then read the product information" Z; Z8 ~+ A* P9 U7 |9 ?
packet and concluded that it was most likely the rea-8 b6 I% k: U6 Z2 F9 W5 C
son for the child’s virilization. At that time, they# Y# T2 w t5 O" x# s( K
decided to put the baby in a separate bed, and the8 o$ k4 g. H9 A7 m: E
father was not hugging him with bare skin and had& K# H8 Z! C5 G4 S7 A# s$ D1 O
been using protective clothing. A repeat testosterone( L. G( l5 e5 r1 Q( K
test was ordered, but the family did not go to the
1 u4 d+ \9 |7 U, i glaboratory to obtain the test.3 [0 Q- P; J6 V
Discussion2 |* z) n" H8 @
Precocious puberty in boys is defined as secondary
) v8 D5 t3 x" ysexual development before 9 years of age.1,4
% Y2 P3 P; Z" k( z& MPrecocious puberty is termed as central (true) when
5 E b# `/ _; {; P/ B6 jit is caused by the premature activation of hypo-
* D G$ ~ ~0 d& |) {# Ythalamic pituitary gonadal axis. CPP is more com-8 V( c4 y. M$ _' }& e
mon in girls than in boys.1,3 Most boys with CPP
& c5 w7 C% d/ N8 z2 R& f+ K' ^may have a central nervous system lesion that is0 N' `- S) c, R1 D
responsible for the early activation of the hypothal-) u( |% w. ^, w4 \4 U
amic pituitary gonadal axis.1-3 Thus, greater empha-
! y# o& ?3 ~. ] ^4 fsis has been given to neuroradiologic imaging in
' ^6 P# Q+ o! W0 A' S( b( n" _boys with precocious puberty. In addition to viril-
1 G' a. D }9 Hization, the clinical hallmark of CPP is the symmet-5 G% G& s) F( j, V: r
rical testicular growth secondary to stimulation by3 z8 e+ y: q z% ?" G' R
gonadotropins.1,3
; l: M( |2 {3 T `' g C, |' c! I# AGonadotropin-independent peripheral preco-# k2 ]4 X0 [/ q* r1 ]) U. `+ ^/ q0 p
cious puberty in boys also results from inappropriate$ E% H) F$ r. I
androgenic stimulation from either endogenous or
) Z) J9 s6 p& e' ?/ Sexogenous sources, nonpituitary gonadotropin stim-) ?) p$ J3 b. E+ I9 R
ulation, and rare activating mutations.3 Virilizing: X" T& ~# O8 k# M& y* |! d
congenital adrenal hyperplasia producing excessive: R# ?, q! ?4 w, t: u# _# _2 c: o
adrenal androgens is a common cause of precocious
$ M9 t7 I& B# ?; ^& M7 D* Ipuberty in boys.3,4
9 L" w. [5 l0 nThe most common form of congenital adrenal7 o( l- E7 p- Q/ @$ v
hyperplasia is the 21-hydroxylase enzyme deficiency.7 e# G, y) F) r9 T# j2 B3 X
The 11-β hydroxylase deficiency may also result in
' t& a+ J# G E5 A" N& g Hexcessive adrenal androgen production, and rarely,4 |- U! B- w5 g
an adrenal tumor may also cause adrenal androgen
7 @+ p! G/ B1 ^, o1 [1 gexcess.1,3
3 c, n+ G7 N5 X0 V8 Pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 F4 D2 j w6 S
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007# L: ^/ M5 P7 g; A7 ^2 w3 N+ A
A unique entity of male-limited gonadotropin-
* t6 v m) h, R& \4 I- P6 ^- Z9 }independent precocious puberty, which is also known# v7 _" D, V5 C
as testotoxicosis, may cause precocious puberty at a* m" |" `" E( z8 W6 p# ` r
very young age. The physical findings in these boys0 i2 ?' S, a9 u9 L0 D( G9 N6 d
with this disorder are full pubertal development,3 W" b" i5 E+ @- y8 t( x2 T
including bilateral testicular growth, similar to boys% x( p% n0 ]" Q7 g! U7 [. P8 |
with CPP. The gonadotropin levels in this disorder
' U7 M9 @" ]( D/ H; eare suppressed to prepubertal levels and do not show9 F# w r0 a5 c3 x
pubertal response of gonadotropin after gonadotropin-
. l+ Z$ j, D9 @; K A. greleasing hormone stimulation. This is a sex-linked8 f* s/ Z5 {4 n6 U7 G! q+ b
autosomal dominant disorder that affects only9 N2 W7 W. Y, P1 F# P8 X
males; therefore, other male members of the family! w% Y) {% P2 q; S( q' M: C: T5 r
may have similar precocious puberty.3
- |% z- j! n. C4 _. |! T/ G- s @In our patient, physical examination was incon-) Q1 q9 K4 y5 b4 k! u0 t) h
sistent with true precocious puberty since his testi-
, I& A9 `7 T6 Gcles were prepubertal in size. However, testotoxicosis
8 y& m" r+ v- X qwas in the differential diagnosis because his father/ C' k* H% \6 L' d+ b
started puberty somewhat early, and occasionally,- {! W' M1 A/ T! W( b
testicular enlargement is not that evident in the
! }& R7 p- U( \& t& t' nbeginning of this process.1 In the absence of a neg-. R' O- E0 ?, R" G, I: r) c6 [; H( X6 R
ative initial history of androgen exposure, our3 K! f3 ] V8 g/ Y8 Z: C0 o
biggest concern was virilizing adrenal hyperplasia,2 O) j- C. h9 L1 P( s
either 21-hydroxylase deficiency or 11-β hydroxylase
4 Z4 @7 a. o C7 \# Adeficiency. Those diagnoses were excluded by find-
- E: L. [/ }. X( ^ing the normal level of adrenal steroids.7 L2 J, m# s8 o: y5 K3 V9 b" \9 K2 n
The diagnosis of exogenous androgens was strongly
2 B6 `- `5 x9 A2 j( s N% g7 W2 {suspected in a follow-up visit after 4 months because5 ?, X* L" E7 O4 I' O/ Y& D4 s1 G
the physical examination revealed the complete disap-
4 L0 {8 c. |5 M# fpearance of pubic hair, normal growth velocity, and
B* t# _( Y) I* Z+ K5 L7 j6 ^decreased erections. The father admitted using a testos-, U# U4 T" `* l, ?+ d1 p- s3 |3 `7 S
terone gel, which he concealed at first visit. He was
* r5 f5 b# z! M6 g. husing it rather frequently, twice a day. The Physicians’" Z& N6 c0 m( t- v
Desk Reference, or package insert of this product, gel or8 w8 E7 q' a2 t. M' h
cream, cautions about dermal testosterone transfer to5 S3 F% c# x+ Z+ f+ q, t
unprotected females through direct skin exposure.
0 y" H+ C+ p( t" q5 BSerum testosterone level was found to be 2 times the" `. d8 c. X [1 L% T
baseline value in those females who were exposed to
! K9 x* p0 L$ f+ _: veven 15 minutes of direct skin contact with their male5 ?8 [# o$ P# K& a
partners.6 However, when a shirt covered the applica-0 m* O4 ]- A: B2 A3 |6 V
tion site, this testosterone transfer was prevented.
9 B( h8 d, @: w: M4 a: _" EOur patient’s testosterone level was 60 ng/mL,
5 m7 d0 o S: k9 ~# u$ swhich was clearly high. Some studies suggest that
, w: o) m9 Y4 Edermal conversion of testosterone to dihydrotestos-1 F& }7 a, y: {% m; }% _. U% j: ?( c
terone, which is a more potent metabolite, is more
9 f% x) a0 m9 m" N& ^% x& ractive in young children exposed to testosterone
7 W/ u# l+ R$ A, S( kexogenously7; however, we did not measure a dihy-+ q2 l3 f K0 H7 @' [& @
drotestosterone level in our patient. In addition to
8 v+ {$ R$ G; `! Qvirilization, exposure to exogenous testosterone in
& x( |4 d" V# t* F' Tchildren results in an increase in growth velocity and
) W3 J. W- j" M Uadvanced bone age, as seen in our patient.
+ r) [; u# ?6 H PThe long-term effect of androgen exposure during5 i: ]; J& l2 e! ? W2 w$ ?3 N
early childhood on pubertal development and final: U3 L, A+ m0 B5 n% F) B- }
adult height are not fully known and always remain
9 y' [# \. R4 D$ Fa concern. Children treated with short-term testos-
( n$ Q9 |$ H- p0 l% f1 h+ z- Q! X8 iterone injection or topical androgen may exhibit some
6 o1 c$ T' ^, F* I/ eacceleration of the skeletal maturation; however, after4 v( D1 D# q' U- W
cessation of treatment, the rate of bone maturation( K7 d/ y( h7 g
decelerates and gradually returns to normal.8,9- J8 E7 D' \/ D
There are conflicting reports and controversy& `& z+ n* A, B3 M$ R$ y/ E- ]
over the effect of early androgen exposure on adult& j' g2 S# `! `6 ], R0 H. ?
penile length.10,11 Some reports suggest subnormal! z$ {. X* @% P
adult penile length, apparently because of downreg-. _1 j+ f( G) [' h9 c, D8 h
ulation of androgen receptor number.10,12 However,
% A j9 s5 G1 o/ _" M: s3 T4 \Sutherland et al13 did not find a correlation between
' c+ H8 w4 x ^7 d: d, _childhood testosterone exposure and reduced adult
- j0 j' K1 Z) G. K+ M, ]9 ]- ?penile length in clinical studies.
) H2 I4 h4 P0 B- r* F+ T8 K$ dNonetheless, we do not believe our patient is9 j. b; ]4 K# }! Y" C/ p% v3 t
going to experience any of the untoward effects from, l7 n5 C( I5 `0 L8 U
testosterone exposure as mentioned earlier because
6 g/ |4 J2 Y; d( I# ?- z+ ithe exposure was not for a prolonged period of time.
) v6 K* Z; l: m" O5 W! u# I. EAlthough the bone age was advanced at the time of: ?( y9 H; d& r" ~3 R1 D& ?+ ^
diagnosis, the child had a normal growth velocity at
9 s- |7 \$ O# S: m. othe follow-up visit. It is hoped that his final adult
* o5 t: J; |* V5 Cheight will not be affected.
' L4 Y" L( |1 I( c% t- `, \Although rarely reported, the widespread avail-
/ M1 K0 ~6 q7 T: ^& fability of androgen products in our society may( O. V* V; W0 [1 _% E
indeed cause more virilization in male or female; b! v2 X6 n1 B8 h2 h2 O) g
children than one would realize. Exposure to andro-* v% `5 q. a3 U9 Q9 x0 m$ H
gen products must be considered and specific ques-
$ T7 C1 i' H% g4 m& R9 htioning about the use of a testosterone product or
. A( m. ?% B6 ] c) Vgel should be asked of the family members during, d! N$ [0 W2 ^
the evaluation of any children who present with vir-/ y% R; k. R' n9 Z: ^7 D
ilization or peripheral precocious puberty. The diag-6 o4 c h8 X0 F9 g
nosis can be established by just a few tests and by& T9 a- F+ q. @ g1 |
appropriate history. The inability to obtain such a+ R/ E# D0 p# h4 V' {6 v1 r
history, or failure to ask the specific questions, may$ p8 q/ }; J4 X
result in extensive, unnecessary, and expensive
' t: ^. d* c: {" P6 h) Jinvestigation. The primary care physician should be/ c% e+ t9 N- U' w4 O" n6 b
aware of this fact, because most of these children
' @# h8 s7 S# d9 smay initially present in their practice. The Physicians’
, h% S @: h' A) C, H8 M% z7 TDesk Reference and package insert should also put a4 |5 ^! ?: S+ d* J, C: ?* `
warning about the virilizing effect on a male or
* L5 V8 G L4 q$ ]& _female child who might come in contact with some-2 ^; a% i5 ~7 J$ C
one using any of these products.
/ @* p/ k3 }6 x; p* X y* IReferences' m- o8 k% J* j, w) H9 Z# {
1. Styne DM. The testes: disorder of sexual differentiation
" @0 t+ l7 l H% c$ mand puberty in the male. In: Sperling MA, ed. Pediatric
. Q E. N* l% {5 T2 `) \$ h& FEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;- ~$ H* z3 d3 m" j S' Y3 v
2002: 565-628.2 a" @ N f1 ]2 S( j
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
# c2 E2 l3 M. o& h2 Fpuberty in children with tumours of the suprasellar pineal
' w! I/ L: g: V1 K9 L6 @$ gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 s7 c* a8 V. V$ r4 L
Topical Testosterone Exposure / Bhowmick et al 543
+ t* N$ W+ D8 _0 O; J5 ~/ ^areas: organic central precocious puberty. Acta Paediatr.! ?5 }8 G; Q3 `' e% [8 R4 g
2001;90:751-756.
- t" G+ v% B; y" W9 g+ z" X4 O }3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.2 B" c, y+ A3 K# F
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
( s* V6 O4 v' n2 A) f/ B/ rDekker Inc; 2003:211-238.( W7 Q$ Q5 b9 t" w
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual$ o: N4 v) ~6 K+ N4 w
development in a two-year-old boy induced by topical8 x" `% M1 `' g: j3 t8 @
exposure to testosterone. Pediatrics. 1999;104:e23.. k! c9 y2 G! ]8 H- t& v
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of6 k3 K) c4 y& V
Skeletal Development of the Hand and Wrist. 2nd ed.
8 d: I8 h+ }+ d% Q: t5 kStanford, CA: Stanford University Press; 1959.6 {, W7 `) M/ _4 z$ n
6. Physicians’ Desk Reference. Androgel 1% testosterone,$ w% E7 W% h% j9 f4 [
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
" O" L% H" ~9 U, b* s. `; mEconomics Company, Inc; 2004:3239-3241.- |9 H8 `2 g% g1 G
7. Klugo RC, Cerny JC. Response of micropenis to topical
; ?# U+ b$ d/ h+ R- S: rtestosterone and gonadotropin. J Urol. 1978;119:
4 o$ J, t8 i8 G x0 ]9 t667-668.
8 w. H5 T/ N6 T- l8. Guthrie RD, Smith DW, Graham CB. Testosterone9 s8 b) v8 t* k8 K# y- L
treatment for micropenis during early childhood. J Pediatr.2 g3 l! G; z' d0 Q9 z% I
1973;83:247-252.
$ X# I3 L' G0 C, E6 s) }) l( |/ }! s4 V9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone5 J) @) q+ R4 B0 ]' h. g
therapy for penile growth. Urol. 1975;6:708-710.
/ k3 h' @, o X, e10. Husmann DA, Cain MP. Microphallus: eventual phallic. j' ~1 {1 \9 e* \& [! r5 \
size is dependent on the timing of androgen administra-
7 T7 T9 G- a8 ^. G) ition. J Urol. 1994;152:734-739. Q# m) E6 i. n1 a
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
8 W6 {' x# \. x- Hdoes early treatment with testosterone do more harm! f1 m0 [# N# W, B% `1 [; G
than good? J Urol. 1995;154:825-829.
% k. V0 q! [$ p0 ?1 k1 ~12. Takane KK, George FW, Wilson JD. Androgen receptor
K8 j( J6 i, u) |" Y* t: N+ `of rat penis is down-regulated by androgen. Am J Physiol.5 O) _0 q' p- g; w
1990;258:E46-E50.& P! g. e$ v( ~8 S9 e3 J) t+ m
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
3 b5 f y% F2 W! m3 R/ Kof prepubertal androgen exposure on adult penile9 U+ d# T+ B. s b# B
length. J Urol. 1996;156:783-787. |
|