- 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 F5 ^5 n* N$ k) Rprecocious puberty (CPP), which is mediated- Y" O8 s# q! I7 {
through the hypothalamic pituitary gonadal axis, has/ a- ^, \; i& `: M/ M+ u' `: m' t
a higher incidence of organic central nervous system
/ \5 [9 E) r; rlesions in boys.1,2 Virilization in boys, as manifested" F5 j0 O; S0 a" A) D
by enlargement of the penis, development of pubic# D* ~/ T( h5 A1 S* E7 U1 m$ z
hair, and facial acne without enlargement of testi-) `& C3 r6 J! i, O" e
cles, suggests peripheral or pseudopuberty.1-3 We- O! N: V7 ?) g; P& j# [
report a 16-month-old boy who presented with the6 h( M2 e/ J" c; j k
enlargement of the phallus and pubic hair develop-0 y- s: E# x" X7 }+ b
ment without testicular enlargement, which was due7 y* I9 A' O, @3 }1 x7 M
to the unintentional exposure to androgen gel used by- k |' ~7 ^4 n) |
the father. The family initially concealed this infor-; M* C" ]) c) P6 }4 k4 B
mation, resulting in an extensive work-up for this
$ x8 `) `$ }5 b3 Gchild. Given the widespread and easy availability of* c' N" i$ G& w. Y9 u6 b' d4 W
testosterone gel and cream, we believe this is proba-
& {" w' }5 y* ?3 H8 d0 ^bly more common than the rare case report in the8 g% ]* ^/ y" J' |/ z0 ]6 ?
literature.4
! S! ^! O( _7 d9 _0 R/ f& q; [* BPatient Report
, g% X& e+ S' d- {A 16-month-old white child was referred to the7 T, O1 m8 p5 n! }: ^, n
endocrine clinic by his pediatrician with the concern% ?8 f7 W: g5 Q+ n, @3 m
of early sexual development. His mother noticed0 k/ P2 w0 V- ^; o$ k2 i" z8 e6 D
light colored pubic hair development when he was
2 @. l# O- A$ {3 D/ o) NFrom the 1Division of Pediatric Endocrinology, 2University of
! _# t g1 v: S1 O1 |South Alabama Medical Center, Mobile, Alabama.' r) ~# `$ k& W/ I
Address correspondence to: Samar K. Bhowmick, MD, FACE,
& ^6 B& s& h* k3 D) [" dProfessor of Pediatrics, University of South Alabama, College of, m" f) j1 |7 K* J, \3 U1 c! R. y8 ~
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
2 w# J3 g, C; K5 `% f# h) [e-mail: [email protected].; o" x1 Y$ V. S, G# q
about 6 to 7 months old, which progressively became
* x& i( p) a$ p+ O: l3 D: f$ c7 \1 vdarker. She was also concerned about the enlarge-; A8 m k! o3 W: q
ment of his penis and frequent erections. The child( q; h% a e. Q
was the product of a full-term normal delivery, with
$ `0 c- k/ F5 J6 f5 h+ C5 pa birth weight of 7 lb 14 oz, and birth length of
2 V8 E. |3 h# W0 [, x4 q20 inches. He was breast-fed throughout the first year6 I* B5 [+ P! x
of life and was still receiving breast milk along with/ ?& U7 ~5 C, t0 D; V) m% S; C
solid food. He had no hospitalizations or surgery,
* V/ y# c; r0 T+ e- H( ~( pand his psychosocial and psychomotor development4 ]; @1 ^6 t- t' R) s& o
was age appropriate.
+ t" }% ]# _. J- y$ U; T! p/ GThe family history was remarkable for the father,
' O& W, s& |; b. x- f9 R! ^+ [who was diagnosed with hypothyroidism at age 16,+ Q- Q4 P8 M( K* S7 N7 W4 V" J
which was treated with thyroxine. The father’s
8 l- T1 o+ \$ f8 G5 aheight was 6 feet, and he went through a somewhat
4 Y" K* \5 x8 ^0 Aearly puberty and had stopped growing by age 14.- c" U& q6 w, c1 M
The father denied taking any other medication. The7 j" d/ o4 I1 s( I Y5 |# p" ?
child’s mother was in good health. Her menarche
: k/ z6 y" l5 O/ T bwas at 11 years of age, and her height was at 5 feet8 r; g4 p% S! `# m+ v3 k
5 inches. There was no other family history of pre-: n1 U; K r* ]
cocious sexual development in the first-degree rela-3 v' R' |$ ]0 u3 c; [9 F9 R y2 u
tives. There were no siblings.
% ]+ `0 l/ }9 D. rPhysical Examination
: k8 x2 g3 ^2 x* l3 \The physical examination revealed a very active,
. u4 w3 z; g2 @5 H6 u6 b" R# eplayful, and healthy boy. The vital signs documented
6 E2 E& a# k7 y; C2 U1 Xa blood pressure of 85/50 mm Hg, his length was1 I8 Y( { C2 ^; G+ C4 O, {& \
90 cm (>97th percentile), and his weight was 14.4 kg. o; @( h) l, A# q
(also >97th percentile). The observed yearly growth
# Z# V6 w( K* k2 Y, G& b yvelocity was 30 cm (12 inches). The examination of
: W/ k1 s2 Q- p# |the neck revealed no thyroid enlargement.
6 x& g: T/ }9 J9 z4 ^! k& N- U' H( NThe genitourinary examination was remarkable for
# t; o$ k) n8 X0 cenlargement of the penis, with a stretched length of
9 @4 G; E. H$ E# `1 r8 cm and a width of 2 cm. The glans penis was very well* N6 d3 k! J- {
developed. The pubic hair was Tanner II, mostly around) \) T1 S4 f' _7 d
540
1 X& e* p3 q5 qat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from5 W `3 g5 u: u# X# `1 \
the base of the phallus and was dark and curled. The6 ^+ H, D8 X2 N4 a7 E8 V" g i( _* @
testicular volume was prepubertal at 2 mL each.
1 L" O& X: w1 u6 bThe skin was moist and smooth and somewhat
8 e0 w; k8 X$ K$ {! S- a/ hoily. No axillary hair was noted. There were no
$ r5 Q( a* m; J# L' l9 K# Labnormal skin pigmentations or café-au-lait spots.2 }- ~7 F. |# D! [4 o5 h
Neurologic evaluation showed deep tendon reflex 2+
0 z1 s& I0 N. ]9 s6 p1 b: obilateral and symmetrical. There was no suggestion! }7 \2 @. M0 d# e/ [
of papilledema. H% a( ]: J) L j8 L
Laboratory Evaluation% o8 J" L1 D7 T3 ~. b
The bone age was consistent with 28 months by
+ o7 r( V: c) l! s$ }using the standard of Greulich and Pyle at a chrono-
& \# `' _8 m, `, Z& alogic age of 16 months (advanced).5 Chromosomal
6 {' {0 S4 j. f) |karyotype was 46XY. The thyroid function test' z( B" J5 p9 S; `' @+ ^
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
% q, Q0 w/ u+ g) ?$ M- D1 {# ~; Mlating hormone level was 1.3 µIU/mL (both normal).
" w1 |4 f' S' _3 O( NThe concentrations of serum electrolytes, blood
, k7 ^- G! x7 K; L4 Y% m: Turea nitrogen, creatinine, and calcium all were
: i6 S2 }4 L0 _+ T; Iwithin normal range for his age. The concentration
. p% g0 D( H# d7 ?of serum 17-hydroxyprogesterone was 16 ng/dL
n, y' P' z9 x: c(normal, 3 to 90 ng/dL), androstenedione was 20' d- b3 ?- u3 x! n2 C8 l7 O
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-5 o9 h; ]+ x) s) o; o' g# Z9 J
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
) j9 L1 |5 P) }: ]' e$ r7 a, Udesoxycorticosterone was 4.3 ng/dL (normal, 7 to
/ [/ @* Y3 j e49ng/dL), 11-desoxycortisol (specific compound S)
) ], f6 B' U! u+ V# B( Ewas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-! l4 A6 |6 ^! t3 n6 W* ?
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total, h/ e8 M/ G' X5 l
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),, o9 t9 }# G8 D/ ~# \( R/ S, C
and β-human chorionic gonadotropin was less than; k3 d" o5 P+ d/ n, x" ~/ @
5 mIU/mL (normal <5 mIU/mL). Serum follicular
+ u' Q) v2 Z# R5 ` P2 Rstimulating hormone and leuteinizing hormone
4 n M( S2 c! D8 c) a, X: G! ^5 zconcentrations were less than 0.05 mIU/mL; Z" f, Z7 x4 S$ D* e4 G% C
(prepubertal).
+ y' t+ s0 r! U4 V1 t. |7 V& l# U, JThe parents were notified about the laboratory+ R: ^* F6 V/ E( ?: \( s
results and were informed that all of the tests were
1 W) U# `' g2 m9 B8 u$ jnormal except the testosterone level was high. The
* v6 B% B1 C6 S0 ^' Bfollow-up visit was arranged within a few weeks to2 X( n5 M, `) u! s% a% E6 y
obtain testicular and abdominal sonograms; how-
9 `3 y% ^. V9 D' Eever, the family did not return for 4 months.+ M9 E( p- Y2 y/ ~" Q
Physical examination at this time revealed that the
5 H4 ~! ?7 v4 _, Ichild had grown 2.5 cm in 4 months and had gained) m' b- l! l6 n( k
2 kg of weight. Physical examination remained6 o& g7 O$ {% o: j0 b) X6 ~: E
unchanged. Surprisingly, the pubic hair almost com-
3 d: q" m3 \& x+ h( epletely disappeared except for a few vellous hairs at2 h8 m9 }) s( [ ]$ Y+ y
the base of the phallus. Testicular volume was still 2! K1 w+ K: |+ m, }2 D
mL, and the size of the penis remained unchanged.& i+ I7 h: N& B9 U
The mother also said that the boy was no longer hav-
, `: K# r2 Y- Ving frequent erections.' L; f0 R/ B& v) h% ~
Both parents were again questioned about use of
8 a t+ D5 {* a- c' Fany ointment/creams that they may have applied to
2 d; E, {( J' q+ m/ z7 lthe child’s skin. This time the father admitted the! `/ Z h% _6 w
Topical Testosterone Exposure / Bhowmick et al 541' {4 K/ e/ C' ^7 K5 p5 @- E
use of testosterone gel twice daily that he was apply-7 ^/ M8 y) v& \9 B6 N2 u% C0 V
ing over his own shoulders, chest, and back area for! o3 Z. I/ w3 s' H* V) j$ x
a year. The father also revealed he was embarrassed
8 H" |5 M7 p, U! u( D' i& U, U8 \to disclose that he was using a testosterone gel pre-
+ e/ G/ a; c/ Z9 n! [* Ascribed by his family physician for decreased libido: W6 ~2 [3 x0 }1 f1 R9 J) S3 r: j
secondary to depression.
\# _, U& [+ d+ oThe child slept in the same bed with parents.6 f' K J# S! K
The father would hug the baby and hold him on his
6 ?4 N0 d* |7 ychest for a considerable period of time, causing sig-2 j$ X) s$ j, W z
nificant bare skin contact between baby and father.
+ A1 a5 q5 F7 aThe father also admitted that after the phone call,& ]: W9 G1 c) h
when he learned the testosterone level in the baby0 T6 X; W4 b( j9 b3 Q! ~4 C
was high, he then read the product information- g9 [% h9 c5 S; ?$ h% u
packet and concluded that it was most likely the rea-
$ h$ K- y0 D0 T. z7 M7 l3 w+ {son for the child’s virilization. At that time, they
, ?! O- G) V% _# {decided to put the baby in a separate bed, and the
5 p! L( m& K$ A3 j/ R& r0 efather was not hugging him with bare skin and had
M5 U" E, p2 }* ?/ Cbeen using protective clothing. A repeat testosterone0 G z; _% j& X* Y% R8 T
test was ordered, but the family did not go to the
% B& m/ N9 k9 t0 hlaboratory to obtain the test.
; u& z5 V9 r! w5 K) sDiscussion
& b2 R2 _+ P% }( H0 P! lPrecocious puberty in boys is defined as secondary8 e. p( _+ ^* h
sexual development before 9 years of age.1,4- w" v4 ?& Z5 k3 E3 q/ Z
Precocious puberty is termed as central (true) when* g" J% ]+ V+ \3 D. `
it is caused by the premature activation of hypo-
5 F& x% J' ?5 R0 e) s; U" D+ L# Lthalamic pituitary gonadal axis. CPP is more com- V. d* C. x$ H# n
mon in girls than in boys.1,3 Most boys with CPP3 M' k' Z- x7 W( L
may have a central nervous system lesion that is, [, W5 E \! \. T1 b( Z* t
responsible for the early activation of the hypothal-' D% Y( f# ]& Y
amic pituitary gonadal axis.1-3 Thus, greater empha-
* F, _: C2 p" q0 s- l* Fsis has been given to neuroradiologic imaging in
4 M3 H) u) q9 Fboys with precocious puberty. In addition to viril-, Z2 I4 |3 P; d1 X7 Z. g& j
ization, the clinical hallmark of CPP is the symmet-
$ X( g) [0 s0 ]5 {& v crical testicular growth secondary to stimulation by6 g! p0 M- y/ E$ M, P: s8 ]; t
gonadotropins.1,3+ q8 G, ?8 M: A$ j' T; U a/ G
Gonadotropin-independent peripheral preco-, e7 u i: R! n* ^8 S' l/ l
cious puberty in boys also results from inappropriate' ?& }9 `7 W+ E7 G) V( i
androgenic stimulation from either endogenous or
t/ O/ _# S/ G! w/ V7 i' [exogenous sources, nonpituitary gonadotropin stim-' r- ?2 v- H1 p3 N& ?
ulation, and rare activating mutations.3 Virilizing A: v+ c# Q0 [0 Y6 }0 K( p9 a
congenital adrenal hyperplasia producing excessive
$ @, Y2 M' Y2 j5 G: padrenal androgens is a common cause of precocious% [6 @4 C1 q/ K6 P/ ^4 N) c
puberty in boys.3,4
+ D) _3 t! f7 Z, [3 ~( bThe most common form of congenital adrenal
5 E; A# ^. D4 S* Rhyperplasia is the 21-hydroxylase enzyme deficiency.
/ ]) o; g4 @- a9 f& IThe 11-β hydroxylase deficiency may also result in
7 ~8 A' G$ d+ T" K7 H& pexcessive adrenal androgen production, and rarely,
) a" _9 Z9 `2 d9 wan adrenal tumor may also cause adrenal androgen
. |) Z( C: ~- g/ q- u0 uexcess.1,3* c; q) ?+ y% B' _; ~
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! H) m& }5 @1 p% G; R542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
3 y9 v% l1 S' d9 k9 m% PA unique entity of male-limited gonadotropin-
, o- |3 \( z( N& e: gindependent precocious puberty, which is also known5 s9 n) S6 [! Z" R9 c
as testotoxicosis, may cause precocious puberty at a, E/ M* H' m( S
very young age. The physical findings in these boys/ Q# w& U4 u* J, o* l
with this disorder are full pubertal development,
- _1 l- a% O: @# Fincluding bilateral testicular growth, similar to boys
* o; M$ }/ I. v) y& M/ r& c' ?5 Pwith CPP. The gonadotropin levels in this disorder
8 q* h; N: X$ I6 n9 E! H5 U2 kare suppressed to prepubertal levels and do not show
v4 k% S& \$ M. d2 _7 ypubertal response of gonadotropin after gonadotropin-
7 A7 I. X$ L: b% x$ Nreleasing hormone stimulation. This is a sex-linked0 q {9 d$ w2 `0 b
autosomal dominant disorder that affects only5 O* v5 p2 {0 Q9 W/ G% N
males; therefore, other male members of the family8 j9 B6 B9 h" m; {
may have similar precocious puberty.3" ^$ {8 _$ i: H) ?! _( Z
In our patient, physical examination was incon-
3 y' S4 X& U4 U ?sistent with true precocious puberty since his testi-# C% L/ W7 F1 Q# A5 A: X
cles were prepubertal in size. However, testotoxicosis- y# l7 k9 B4 f, B
was in the differential diagnosis because his father" Q# M0 m( K3 o8 D- U5 ]
started puberty somewhat early, and occasionally,2 {$ ]# O% S6 Q
testicular enlargement is not that evident in the
$ M1 m6 P9 y4 r7 k- H' Q4 Lbeginning of this process.1 In the absence of a neg-
! E' C* s4 }4 _* Oative initial history of androgen exposure, our; F7 Z7 p j, A& d
biggest concern was virilizing adrenal hyperplasia,/ @2 S7 P# G( a4 D
either 21-hydroxylase deficiency or 11-β hydroxylase& n' R7 F4 }: P4 r6 Q N
deficiency. Those diagnoses were excluded by find-
# k) M1 V1 B Ling the normal level of adrenal steroids.) Q7 Z! y2 K* @
The diagnosis of exogenous androgens was strongly9 w+ I, \! R' K! i$ U4 v
suspected in a follow-up visit after 4 months because% O- l! V) ~* S
the physical examination revealed the complete disap-
. U" z) i! b; hpearance of pubic hair, normal growth velocity, and
" |1 ~* T1 B' l. c/ D, jdecreased erections. The father admitted using a testos-
: @% z+ U: N) Q" h. uterone gel, which he concealed at first visit. He was
; N8 b4 E7 f/ Qusing it rather frequently, twice a day. The Physicians’6 Z0 ?; k8 A4 e1 W( g
Desk Reference, or package insert of this product, gel or$ ?2 F2 Z8 N. H4 H: ~% f; b4 t
cream, cautions about dermal testosterone transfer to
) e, [: L6 M7 T+ Z# `0 d& Hunprotected females through direct skin exposure.
. a4 N. U$ x) H1 q" e1 bSerum testosterone level was found to be 2 times the
' G) Q8 ^. c9 ibaseline value in those females who were exposed to
2 `% X1 X3 e- J+ g4 u* C7 Leven 15 minutes of direct skin contact with their male
( R" ]7 O; U. ~0 J. Z% p3 Ipartners.6 However, when a shirt covered the applica-- D- B' _! X) ^" h) |
tion site, this testosterone transfer was prevented.
, C+ @* C# K& V: x# |7 LOur patient’s testosterone level was 60 ng/mL,
, s; f' }2 p0 v6 i6 A3 e2 ]which was clearly high. Some studies suggest that
" [ p7 x2 @* ]1 J# t" K- [dermal conversion of testosterone to dihydrotestos-1 g" V& g0 q" h0 x C) |
terone, which is a more potent metabolite, is more
2 z. E. v0 N! N& nactive in young children exposed to testosterone: c& a% r+ c4 P: D, o) M h6 J
exogenously7; however, we did not measure a dihy-
0 x1 t2 U' L) V: i$ B/ N e9 w. Ldrotestosterone level in our patient. In addition to4 q! H. b; g( O1 w" |+ r0 N
virilization, exposure to exogenous testosterone in
! O$ `1 m8 Y! r; rchildren results in an increase in growth velocity and. i) F9 J: O$ T, }. E
advanced bone age, as seen in our patient.
* W. j; ^) J6 ]: V, u" g2 w; nThe long-term effect of androgen exposure during
' U. d+ A+ L( s4 h7 f5 cearly childhood on pubertal development and final8 z: q0 T$ L, }: A8 x! P: n
adult height are not fully known and always remain2 W, i5 ?& Q& m9 \* N% }2 |
a concern. Children treated with short-term testos-
3 A! B2 \, ~( t; Z; \0 v7 pterone injection or topical androgen may exhibit some
3 Y. g% ~' T: W8 Qacceleration of the skeletal maturation; however, after
9 X0 J: V) Z8 g/ s3 `* i; _, i' |0 P" mcessation of treatment, the rate of bone maturation6 Y! r6 ?$ B, t/ I+ T9 Y8 a) R' Q
decelerates and gradually returns to normal.8,9/ r* j* H/ U, p2 M* S# Q0 @
There are conflicting reports and controversy% z/ X7 v: e+ K1 t# @: A$ T' G1 q2 J
over the effect of early androgen exposure on adult6 `- @. S) Q& K* q, g
penile length.10,11 Some reports suggest subnormal
( U6 G/ Z2 j+ R" ~+ \0 p5 {adult penile length, apparently because of downreg-
. M9 D. @6 \7 C% ^# g9 y+ T5 pulation of androgen receptor number.10,12 However,
2 }4 Q: G% H ~( {3 [! P5 vSutherland et al13 did not find a correlation between
G( C0 `/ d, A' L0 y: Xchildhood testosterone exposure and reduced adult
: v }( c3 D5 x: b/ d V; o$ epenile length in clinical studies.
$ o3 c( C( } G- |Nonetheless, we do not believe our patient is
% }& N. I5 m1 S/ S0 c( i. y. @going to experience any of the untoward effects from
, _; [5 u2 M5 x6 jtestosterone exposure as mentioned earlier because+ y' B/ M' q: g# p. m/ w
the exposure was not for a prolonged period of time.& L. {: z+ e1 l% g7 `' y& n) p+ z
Although the bone age was advanced at the time of
) Y f9 \! v. M) P2 E' Ddiagnosis, the child had a normal growth velocity at" C& J. d* H9 X o1 }3 q" u
the follow-up visit. It is hoped that his final adult0 w) |$ Y6 M+ w7 D% A
height will not be affected.
- ^3 |; o6 t' u6 E" K* G$ `Although rarely reported, the widespread avail-
4 r9 d$ |( ?' `/ a. n [0 vability of androgen products in our society may
) l' u- S( p1 G( q! _ Y2 L) |indeed cause more virilization in male or female$ \7 K+ b! p% A" W$ w9 T" h. F
children than one would realize. Exposure to andro-! K, m# ?4 r3 n+ S
gen products must be considered and specific ques-
7 c3 p2 c4 r+ {/ t8 Y! Ztioning about the use of a testosterone product or
- N6 q l2 \8 q& X8 M2 b; ?: ]gel should be asked of the family members during
l" L. @; \0 z4 ]! |& Othe evaluation of any children who present with vir-
+ A2 ?, u$ Y* q: x( ?ilization or peripheral precocious puberty. The diag-0 |: J% `& e2 {- v
nosis can be established by just a few tests and by
. M) }: q9 C, {' T" |- d+ {4 rappropriate history. The inability to obtain such a8 h5 J; e' O i: |! _7 G: V+ j
history, or failure to ask the specific questions, may% P: B! N* P1 Q" c' F
result in extensive, unnecessary, and expensive
& W9 z3 e9 a- a+ Uinvestigation. The primary care physician should be. X1 w9 h& ^, I% m6 n! v& ~7 G# M9 l6 ~
aware of this fact, because most of these children1 Y I( y: p9 N& L
may initially present in their practice. The Physicians’5 X9 i6 ]. t2 v r2 W9 l9 ?9 L
Desk Reference and package insert should also put a" p( I) F* l% ~7 `2 g
warning about the virilizing effect on a male or( H7 g3 Q# ]" S1 G( c* E
female child who might come in contact with some-
) r' C5 N' K% ?$ j3 p* W; Aone using any of these products.
+ m7 t( Y9 n; z$ t9 w9 W6 K2 M! x# @9 vReferences2 h: _1 [3 I% F0 N3 C' w$ D
1. Styne DM. The testes: disorder of sexual differentiation+ `( L* l* {% x& ]: b$ u; r
and puberty in the male. In: Sperling MA, ed. Pediatric \; l+ j. w( S/ y ^
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
3 `( y) l. t! R' R5 X' m2002: 565-628.
& [* D! P7 _$ V; p. P7 I2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious" r9 ]( l1 j; ?! A
puberty in children with tumours of the suprasellar pineal
/ H( a! Z8 w0 U* i% [1 l& f# Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. s2 Z1 m; r2 z1 [0 }Topical Testosterone Exposure / Bhowmick et al 5438 a+ j" q) Z5 g7 [
areas: organic central precocious puberty. Acta Paediatr.9 F, ]' ~! v8 X s" |
2001;90:751-756.
( B1 M7 i" H# [+ B( f# U3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
! Z5 ]/ Q' L: y- N( a( a, s' RPediatric Endocrinology. 4th ed. New York, NY: Marcel
2 Q$ ]1 m: r+ @6 | c2 k0 M* F0 QDekker Inc; 2003:211-238.* F) `4 d2 q: g- a% s- f
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
& c7 A" n2 g& l6 l) z) odevelopment in a two-year-old boy induced by topical
- b% D2 q! W3 w* ?/ lexposure to testosterone. Pediatrics. 1999;104:e23.' t5 a& s( M" y2 Y
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of& ]9 P$ o# H% n" m0 W' @. k
Skeletal Development of the Hand and Wrist. 2nd ed.
8 J6 T$ y4 \9 ^: _8 s: }. E! d7 ZStanford, CA: Stanford University Press; 1959.
/ R" W# y5 s9 m9 v( K6. Physicians’ Desk Reference. Androgel 1% testosterone,; x/ a, o5 j" l6 C" z% c. C
Unimed Pharmaceutical Inc. Montvale, NJ: Medical/ m# A s q; r1 n- c q. t: L
Economics Company, Inc; 2004:3239-3241.
- z. L5 F6 e2 l& I9 u4 H7. Klugo RC, Cerny JC. Response of micropenis to topical8 V" P' ]5 E6 e5 T% D
testosterone and gonadotropin. J Urol. 1978;119:
0 R' }# O. n, R' Q T667-668.
! O5 g; Z( N% @8. Guthrie RD, Smith DW, Graham CB. Testosterone' W6 C7 y2 p3 d$ N) o. ^
treatment for micropenis during early childhood. J Pediatr.
$ O& _' p6 ]2 R% r3 P4 f1973;83:247-252.
9 v8 K$ e/ y& q2 y9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone: ~( |9 g( F1 Q1 x
therapy for penile growth. Urol. 1975;6:708-710.
9 W* a5 i; d3 e0 X, q6 D- T! z10. Husmann DA, Cain MP. Microphallus: eventual phallic+ f7 f, q3 Q* j+ C/ x0 L
size is dependent on the timing of androgen administra-2 J' W- I O' r- v
tion. J Urol. 1994;152:734-739.6 P/ U: N: n0 J$ B1 o
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:6 i6 O. X- v9 W4 V$ F
does early treatment with testosterone do more harm
7 {0 s9 y2 N0 B4 R4 athan good? J Urol. 1995;154:825-829.5 b6 R/ Q/ n% ^2 t3 L
12. Takane KK, George FW, Wilson JD. Androgen receptor
, ]# r! I& ^. Vof rat penis is down-regulated by androgen. Am J Physiol.1 x1 l# M, ~3 g' S& `; [1 L2 n
1990;258:E46-E50.
# H7 a1 K/ [3 {( C13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
, C$ W; o& z5 i: T! l# Iof prepubertal androgen exposure on adult penile
B/ C& w: J7 V" Xlength. J Urol. 1996;156:783-787. |
|