- 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 T: _6 ^+ C/ h" h) D$ f& R
precocious puberty (CPP), which is mediated( @- W1 y9 h i; `5 { j
through the hypothalamic pituitary gonadal axis, has: Z0 j4 s5 L7 o% R# e# G, l
a higher incidence of organic central nervous system
1 c9 s( a2 a! a* e V& Nlesions in boys.1,2 Virilization in boys, as manifested
4 G k, A: l! Qby enlargement of the penis, development of pubic
: {( R/ \; B6 D+ t9 P8 ?hair, and facial acne without enlargement of testi-
' a+ W r6 t, |' b2 {* P6 @cles, suggests peripheral or pseudopuberty.1-3 We, e) C' C6 s% P' S6 U. v
report a 16-month-old boy who presented with the
2 [. B: H9 p( w: } @enlargement of the phallus and pubic hair develop-# L4 O: ~- }3 _" x1 p( J% E; @ L6 Q
ment without testicular enlargement, which was due
3 }, l+ \& W$ ], y# ]$ c: ]to the unintentional exposure to androgen gel used by k2 W+ N: z" n# K
the father. The family initially concealed this infor-
& g1 k) {( c4 r! b. kmation, resulting in an extensive work-up for this, Y/ O7 N+ f& O, Y; C: t4 C8 a2 _
child. Given the widespread and easy availability of
' t+ ?' i6 I n! K2 S+ S& f2 U) Itestosterone gel and cream, we believe this is proba-! Z0 u. `& X1 a6 o2 q
bly more common than the rare case report in the' ]& k5 e& J) X9 q X
literature.4
" F+ H4 y+ E' j, WPatient Report
( x" C, P" t# N s/ X: H( gA 16-month-old white child was referred to the
: n6 l# J5 ~0 x0 c, T2 tendocrine clinic by his pediatrician with the concern# F4 s8 G1 [# X
of early sexual development. His mother noticed
( r/ k2 H2 i: w" zlight colored pubic hair development when he was
! h- ` X# S4 Y7 }From the 1Division of Pediatric Endocrinology, 2University of/ i7 j* V! M7 |9 k
South Alabama Medical Center, Mobile, Alabama.( p" I6 G# z0 e6 @- ^0 | Z
Address correspondence to: Samar K. Bhowmick, MD, FACE,
% V! J' `+ k7 N7 f* qProfessor of Pediatrics, University of South Alabama, College of
0 M$ {8 }' V+ \6 B4 ~Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;% K$ H/ Y9 T. I4 H, H
e-mail: [email protected].
0 x: b( `/ |/ Z1 `: z5 ?about 6 to 7 months old, which progressively became+ J: J% I: |1 ~9 y: a
darker. She was also concerned about the enlarge-9 ^! ~2 B5 M; s9 } M' Q, a- w
ment of his penis and frequent erections. The child
3 c4 T+ o- b, E* s1 Z U- g% u$ Qwas the product of a full-term normal delivery, with1 I. M9 [4 a( K3 u: U) e: F% h! Y
a birth weight of 7 lb 14 oz, and birth length of( g$ \$ l* K) g! f8 m) x* C
20 inches. He was breast-fed throughout the first year, j& g7 n+ J; A! D* _& j
of life and was still receiving breast milk along with; Z) i m. J' |/ b
solid food. He had no hospitalizations or surgery,
' d9 i" w$ _, n0 r \8 _and his psychosocial and psychomotor development
! X) w3 T0 o; n+ M; @was age appropriate.
2 p# Y, T$ N- w3 b4 wThe family history was remarkable for the father,
% J$ k2 V9 e" u; `1 D( P: Zwho was diagnosed with hypothyroidism at age 16,
" k( {1 m( |0 ]) f( d# L; D: mwhich was treated with thyroxine. The father’s& {3 o9 m+ b; d( E/ @, \4 T
height was 6 feet, and he went through a somewhat# W% q2 h$ B: u5 v' F
early puberty and had stopped growing by age 14.+ e. O# K, e" w" f
The father denied taking any other medication. The
8 X1 B2 S0 k% s' w3 ~" E" pchild’s mother was in good health. Her menarche& b9 [% X: }& @& w6 k1 R: X9 W
was at 11 years of age, and her height was at 5 feet0 q7 O3 D- R" V* \+ v* G
5 inches. There was no other family history of pre-; O- V, Y/ v( Z X
cocious sexual development in the first-degree rela-- i" C2 y. S" w% E, R! X
tives. There were no siblings.# g; n8 y4 m& k5 }' H
Physical Examination
3 q* V: u: _: L& j! F1 f8 P6 h3 BThe physical examination revealed a very active,1 a3 `) U5 G; S7 M" U
playful, and healthy boy. The vital signs documented
) e/ c5 k9 c3 B. x+ p% fa blood pressure of 85/50 mm Hg, his length was
; |, E- @+ o! Q& c7 V v) u90 cm (>97th percentile), and his weight was 14.4 kg
, f7 o6 l9 d, ]4 J4 s' q( ?0 F(also >97th percentile). The observed yearly growth
* R' s: P: u8 d, jvelocity was 30 cm (12 inches). The examination of
' c# T6 P( V' Y2 I/ U: c. _% u4 [the neck revealed no thyroid enlargement.- W( a" n, Q+ a& {8 K* J9 F* e) q
The genitourinary examination was remarkable for3 g) j# k# B$ }; E, q1 Q" O
enlargement of the penis, with a stretched length of
0 Z9 E# |4 Z9 b( L' d4 ]3 l9 }8 cm and a width of 2 cm. The glans penis was very well
$ X$ w7 ~5 D' B& X/ r: K! J7 ?developed. The pubic hair was Tanner II, mostly around
/ _1 x5 O: V0 b5 d! K7 }& m! g540' p2 g2 o9 o/ i9 X3 R) V
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
5 A. H) p* w$ Z( d- v* Xthe base of the phallus and was dark and curled. The
" i) r j" c9 Z* Stesticular volume was prepubertal at 2 mL each.% \, P4 Y7 N' Q- b _; f9 y4 t6 ^
The skin was moist and smooth and somewhat
! |5 h$ I/ H6 i) k* Qoily. No axillary hair was noted. There were no4 p' X( C, Y# b
abnormal skin pigmentations or café-au-lait spots.
1 t3 ^( S6 w1 I. b9 X: r' VNeurologic evaluation showed deep tendon reflex 2+2 ]/ v0 F3 J( B+ q+ e
bilateral and symmetrical. There was no suggestion9 `# d9 s+ n, I; b7 s' `
of papilledema.
! |# n U: z; E. K- L/ m* xLaboratory Evaluation
3 n+ k6 t& ^7 U+ `. P% S6 DThe bone age was consistent with 28 months by# K9 k9 ^, \! v- y
using the standard of Greulich and Pyle at a chrono-
4 c Y4 y( x3 D8 N# v3 xlogic age of 16 months (advanced).5 Chromosomal* F+ }. X9 i* e. ~8 h. N* g
karyotype was 46XY. The thyroid function test
. |# d9 `0 q$ p0 ^showed a free T4 of 1.69 ng/dL, and thyroid stimu-2 |7 B, ?) [% Q/ j+ C& ?7 s
lating hormone level was 1.3 µIU/mL (both normal).
/ L' ~3 ^: `* W# q0 kThe concentrations of serum electrolytes, blood
' ]) i% N8 E/ \9 N$ z" {, f3 E% furea nitrogen, creatinine, and calcium all were
I! Y6 ~( C$ v4 X5 A g4 `within normal range for his age. The concentration
5 G; N8 N3 r( O) n6 lof serum 17-hydroxyprogesterone was 16 ng/dL7 K/ @3 v4 ?* j
(normal, 3 to 90 ng/dL), androstenedione was 20
! [2 p$ s1 k: `- ong/dL (normal, 18 to 80 ng/dL), dehydroepiandros-& T& |+ w- G0 G5 |& m
terone was 38 ng/dL (normal, 50 to 760 ng/dL),( b( o. {! t! _- a7 h' \
desoxycorticosterone was 4.3 ng/dL (normal, 7 to. ^( U+ X- O; t1 C
49ng/dL), 11-desoxycortisol (specific compound S)
5 v9 n- d6 C. lwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-8 j# @8 a) z2 }1 ]( J" J) w; @
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
0 H" }1 X1 M' E* Gtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
5 _2 Z$ h) }" ?! gand β-human chorionic gonadotropin was less than
+ }6 T& J% M5 ]( I1 r) Z5 mIU/mL (normal <5 mIU/mL). Serum follicular
5 P3 q( k5 n% ]7 h+ Wstimulating hormone and leuteinizing hormone
7 o" R' c6 }7 Z# x3 `concentrations were less than 0.05 mIU/mL# X' l+ R9 x( H0 ?
(prepubertal).$ T6 V$ }1 a% Q5 E
The parents were notified about the laboratory
" D& u5 H4 d: Y9 `& ^results and were informed that all of the tests were7 K/ _. S# j* D! F! U, H. e
normal except the testosterone level was high. The7 ?1 F) _ C5 `/ d* T5 o
follow-up visit was arranged within a few weeks to# h w* Y( h" O! h0 D: }" o1 ]
obtain testicular and abdominal sonograms; how-
2 ^" L& @7 P* _, u5 u6 e, f6 G) |ever, the family did not return for 4 months.! U& L/ I: @% d
Physical examination at this time revealed that the ?8 N4 z! p( [8 M! r8 G ` I
child had grown 2.5 cm in 4 months and had gained5 ]* w5 P. B# k- z0 F
2 kg of weight. Physical examination remained6 q% ~; o$ U, \) Y' }
unchanged. Surprisingly, the pubic hair almost com-
2 d) I6 W7 r6 Tpletely disappeared except for a few vellous hairs at% ]+ C# {. u3 m# k& L+ M- w0 S
the base of the phallus. Testicular volume was still 2 y6 |, d0 o- Q9 r$ ^
mL, and the size of the penis remained unchanged.5 e4 @5 V, N3 x/ f$ B
The mother also said that the boy was no longer hav-
3 J+ f1 s9 T' Z+ b' _ing frequent erections.6 J6 s* @" ]4 {( @8 ~
Both parents were again questioned about use of6 _0 M* J6 _, k( C- P1 c/ P
any ointment/creams that they may have applied to
! d9 h( W9 N! P0 Q' [the child’s skin. This time the father admitted the3 @& [. U9 s B% {! U/ w2 W
Topical Testosterone Exposure / Bhowmick et al 541. J6 W2 J1 ?" d+ H
use of testosterone gel twice daily that he was apply-
: F% t6 ]- e; k! o0 ging over his own shoulders, chest, and back area for
( o& i' r5 N3 _0 C: Q0 ta year. The father also revealed he was embarrassed
! f) [, K# w' Y" n$ C' hto disclose that he was using a testosterone gel pre-
! ^$ H0 O) E$ V% H- z0 X9 Nscribed by his family physician for decreased libido
" V' S+ C: t0 b$ psecondary to depression.6 u# {+ B5 [. }5 H
The child slept in the same bed with parents.
; o) \' h3 ?. qThe father would hug the baby and hold him on his
! i$ ~' U& }8 Q, x0 F8 Rchest for a considerable period of time, causing sig-
1 ~% r8 s( o1 w+ d( ^( }9 W8 ?6 `nificant bare skin contact between baby and father.* @, e6 p; W! y; L2 N
The father also admitted that after the phone call,0 o6 g- s: p0 V% K. Y
when he learned the testosterone level in the baby
: \% P" Z3 L' G8 x0 |" Nwas high, he then read the product information
/ V7 q' L8 ^) q9 n, y1 T6 ]packet and concluded that it was most likely the rea-
2 n+ q, a8 X! n2 \; Q0 d6 Q+ q' json for the child’s virilization. At that time, they6 Z- k, G3 v2 M
decided to put the baby in a separate bed, and the( r# ?( p! b- ]) P+ n
father was not hugging him with bare skin and had/ D* w7 R3 D8 c$ r; ]3 |
been using protective clothing. A repeat testosterone
O1 Y* a3 O! Vtest was ordered, but the family did not go to the
7 i3 {/ e; y9 X) {* C ?. Olaboratory to obtain the test.
3 `# l2 o# b. C0 b* ]. t. ^& L, @2 VDiscussion3 F$ x& g9 ?, }6 @! y
Precocious puberty in boys is defined as secondary
$ s0 B* H+ _( f; h- `* a% Usexual development before 9 years of age.1,4
2 |7 b; Z5 J6 i5 OPrecocious puberty is termed as central (true) when2 H; n1 U3 }6 u2 L0 u
it is caused by the premature activation of hypo-0 L% Y; _8 {9 ^
thalamic pituitary gonadal axis. CPP is more com-' V1 t* a* i3 b, }; Q
mon in girls than in boys.1,3 Most boys with CPP2 t& T: c3 R$ ?0 T% p$ m/ O' I
may have a central nervous system lesion that is9 M- q) T- e% Y% ~- U5 U
responsible for the early activation of the hypothal-
1 _3 ~$ A4 J$ @1 k3 s }; h/ Famic pituitary gonadal axis.1-3 Thus, greater empha-
5 _; L) Y. k+ e$ x& i+ ^sis has been given to neuroradiologic imaging in
! t" V! u% ^6 O. |0 Wboys with precocious puberty. In addition to viril-
% d0 m6 u% w5 f( s6 J2 u9 r" uization, the clinical hallmark of CPP is the symmet-
* `/ a z' L, p! l1 }8 T. t+ @" jrical testicular growth secondary to stimulation by5 J _1 i' g# N* H
gonadotropins.1,3" N ] `! A6 {2 @
Gonadotropin-independent peripheral preco-
7 U6 `# W1 E1 t0 _; kcious puberty in boys also results from inappropriate
$ N! z* @3 U# o* n; B! Q% o' [androgenic stimulation from either endogenous or
' c: N/ z: T! x7 h: W/ l, Lexogenous sources, nonpituitary gonadotropin stim-7 w0 Q& `, u2 e. b( j5 h: |; ^
ulation, and rare activating mutations.3 Virilizing* h0 K/ S9 V( e8 K
congenital adrenal hyperplasia producing excessive. q8 F% Z; a) U( T4 g$ F+ f
adrenal androgens is a common cause of precocious
6 @- D# g3 v0 X/ G& _& l( n+ n( Mpuberty in boys.3,4
, o( P, B$ I, c: Q* FThe most common form of congenital adrenal
; x, r! O& L k. R, d: u2 s) e( Ihyperplasia is the 21-hydroxylase enzyme deficiency.
p" `2 O {5 _1 }The 11-β hydroxylase deficiency may also result in
+ B4 a: D$ ^; _5 F- wexcessive adrenal androgen production, and rarely,- k, U, p! s# m+ Z. `7 ~5 Q% B7 i
an adrenal tumor may also cause adrenal androgen! o. f. ?3 f. e0 z7 D0 _
excess.1,3' M& k1 z# G* V( W
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 M- Y$ \0 f% x/ \6 G542 Clinical Pediatrics / Vol. 46, No. 6, July 20075 C; G, R" L$ r$ `- l
A unique entity of male-limited gonadotropin-
( N& v1 \# M4 _' A7 tindependent precocious puberty, which is also known
# B$ M9 Y Q Z) x; has testotoxicosis, may cause precocious puberty at a' | k8 K9 Y& l; _ ]6 Z
very young age. The physical findings in these boys
, l S1 w% N+ w+ b: D% \0 ?8 Dwith this disorder are full pubertal development,4 u* M/ q: p- p( {, g Z4 K
including bilateral testicular growth, similar to boys
' T, |$ D3 C; F- ]( y x$ n, wwith CPP. The gonadotropin levels in this disorder
( L k7 I0 U$ q' iare suppressed to prepubertal levels and do not show3 X! J4 [: V6 s& d
pubertal response of gonadotropin after gonadotropin-
4 H; N: s: F, @# G4 A$ Areleasing hormone stimulation. This is a sex-linked
+ P% m- D) Y/ z/ Sautosomal dominant disorder that affects only6 k6 ~( F( R' a/ \3 G
males; therefore, other male members of the family
! K* a( Z3 p ^may have similar precocious puberty.3
2 U2 {5 f5 ]7 QIn our patient, physical examination was incon-0 `# h% G0 P) M
sistent with true precocious puberty since his testi-# }* _: E2 e1 \8 {9 w* }
cles were prepubertal in size. However, testotoxicosis8 M' w9 M. |/ T% k
was in the differential diagnosis because his father6 R2 M; \* f% g. o" W2 A
started puberty somewhat early, and occasionally,5 o. t% r* {7 B; S
testicular enlargement is not that evident in the
' B. \0 o: b/ Y$ |2 x# }beginning of this process.1 In the absence of a neg-
# w2 o6 H) x% D F7 K, fative initial history of androgen exposure, our
4 F: `2 C' J1 |5 o0 E$ n& R& a x1 {# ebiggest concern was virilizing adrenal hyperplasia,
$ q& ~/ l% c( E% l4 }4 H3 D8 reither 21-hydroxylase deficiency or 11-β hydroxylase
* c6 S& j2 ]7 I9 T _+ T( Jdeficiency. Those diagnoses were excluded by find-6 l& u* r2 l- ^: x
ing the normal level of adrenal steroids.
1 @$ S2 b1 L, A/ |$ B- C. SThe diagnosis of exogenous androgens was strongly
5 }% w7 W1 P$ [2 _suspected in a follow-up visit after 4 months because
1 H; r) _& l9 g! }. Xthe physical examination revealed the complete disap-6 V4 P4 O0 y, ^- c6 a- H8 T# A
pearance of pubic hair, normal growth velocity, and
- ]/ B" ]6 I" @8 ~. n. L0 A/ Kdecreased erections. The father admitted using a testos-0 D6 m7 h( I% e: W
terone gel, which he concealed at first visit. He was0 M% v& l: x& q s" A
using it rather frequently, twice a day. The Physicians’
1 s) B! h" z1 v; s7 `% W, cDesk Reference, or package insert of this product, gel or1 J# o8 M3 S* O
cream, cautions about dermal testosterone transfer to
3 }% ?6 a! o2 f/ d% nunprotected females through direct skin exposure. E0 S9 L0 r: C4 h0 t
Serum testosterone level was found to be 2 times the# e9 {. {& l3 b) o+ X' N5 A# b% b
baseline value in those females who were exposed to
+ S5 G& J7 n6 k% ]! J& s# E* a( m0 eeven 15 minutes of direct skin contact with their male$ G5 Q$ l/ s6 a @. Y
partners.6 However, when a shirt covered the applica-3 H- ?3 l$ w5 _3 i% @$ y$ g
tion site, this testosterone transfer was prevented.
& Y8 j3 [3 a" b0 H/ DOur patient’s testosterone level was 60 ng/mL," n* c, Z2 N% }7 q8 d$ N
which was clearly high. Some studies suggest that' }; Z2 O6 a$ x: L
dermal conversion of testosterone to dihydrotestos-
0 \( \ T8 c3 r2 G# D" N0 d8 `terone, which is a more potent metabolite, is more
, H0 Z7 U4 ^9 m# f# N& zactive in young children exposed to testosterone( Y9 ^( h- Y p! |8 I3 d1 N
exogenously7; however, we did not measure a dihy-5 F$ c0 E+ a% C9 |. d: \) q/ E( u
drotestosterone level in our patient. In addition to
2 T. |; q2 H7 {- a2 xvirilization, exposure to exogenous testosterone in
' L6 k( s2 M( ?children results in an increase in growth velocity and
, Z9 B. z: e! Dadvanced bone age, as seen in our patient. y# I# I$ Z2 Q* \4 ~
The long-term effect of androgen exposure during
/ E% m, F: h' z+ T7 n$ pearly childhood on pubertal development and final
" _' d8 x, U, e( W% e. madult height are not fully known and always remain% X: \' ?: R K" f$ _% n+ G
a concern. Children treated with short-term testos-4 W/ `; ~4 r/ R D) W
terone injection or topical androgen may exhibit some/ ^+ z" Z E4 B( G' U
acceleration of the skeletal maturation; however, after2 Z) m3 } v2 U2 w ]" f, s1 Z
cessation of treatment, the rate of bone maturation& ]5 @1 D, ~% V$ R3 t+ e
decelerates and gradually returns to normal.8,9
* l2 z# e( G: r: |2 N% X6 fThere are conflicting reports and controversy
4 \7 U& r! T1 u) X, G# O! O: Y7 c9 V5 sover the effect of early androgen exposure on adult
% L; k3 d' t! s1 m3 v9 Dpenile length.10,11 Some reports suggest subnormal
1 n( D1 t3 S, r# H6 E5 oadult penile length, apparently because of downreg-' J3 y: K- S" m
ulation of androgen receptor number.10,12 However,
( w+ w0 ~0 x4 C( C4 v) h! n4 [Sutherland et al13 did not find a correlation between
" ?% |7 w+ g: T/ o5 ychildhood testosterone exposure and reduced adult+ F# f4 s* b4 n1 z: C* n
penile length in clinical studies.
9 B# S0 S) ^( N% y# BNonetheless, we do not believe our patient is
( h4 @+ A9 ` |+ B1 ?going to experience any of the untoward effects from
0 Z( z3 k$ R( h/ C+ Y/ Etestosterone exposure as mentioned earlier because X/ M2 |5 f/ b# a0 Y4 T2 Q; F# j
the exposure was not for a prolonged period of time.
' g r7 M3 ^5 w( x# KAlthough the bone age was advanced at the time of
. m1 i: Y: @" Q) z w+ e! E& |+ Gdiagnosis, the child had a normal growth velocity at
) l1 E Z0 Y R3 J# qthe follow-up visit. It is hoped that his final adult
) R' d9 H3 O O; }! R9 P. Vheight will not be affected." v' k6 V0 {; S1 Y0 ^0 K
Although rarely reported, the widespread avail-
9 B2 G, B C5 o6 _* Z0 Uability of androgen products in our society may- |/ S& E7 P/ ~3 M6 o
indeed cause more virilization in male or female
# }) ~6 M( C( U, V) ?- P, T1 ^. ychildren than one would realize. Exposure to andro-0 r5 B0 F$ M8 d8 u
gen products must be considered and specific ques-1 c5 b- Y+ K& }& T! w
tioning about the use of a testosterone product or
+ {8 j; D1 N# \) tgel should be asked of the family members during
2 N- L% X& c4 U U. hthe evaluation of any children who present with vir-
8 w! T6 u( W1 Y5 [ilization or peripheral precocious puberty. The diag-! k% m$ q& n7 P6 b: W7 ?
nosis can be established by just a few tests and by: t+ Y' u: ^% ^) h f" E' q
appropriate history. The inability to obtain such a
$ I) ]. C" }) `+ V+ C uhistory, or failure to ask the specific questions, may
8 g# H8 z$ b# e! ^ t% O2 w9 t1 @8 dresult in extensive, unnecessary, and expensive
* `; m9 D0 T/ ~1 x7 vinvestigation. The primary care physician should be. ~' X! j4 H" C
aware of this fact, because most of these children
- ~. T0 n! t: k( a* R* r- ^may initially present in their practice. The Physicians’9 t; i2 _' e& C8 x L7 c
Desk Reference and package insert should also put a
8 G+ P" h; z% t6 k% ?3 j2 ?warning about the virilizing effect on a male or( H( y; m: L5 l6 _' O/ A2 L
female child who might come in contact with some-
5 N+ i g2 V) H8 Y: a4 a+ oone using any of these products./ U0 M" @9 G5 `) ]0 U D2 h
References! }* C* G0 S9 {3 L, d$ n. j5 y& d; o
1. Styne DM. The testes: disorder of sexual differentiation
1 f# W& {5 L- Tand puberty in the male. In: Sperling MA, ed. Pediatric. {* ]( ?: B1 K1 u6 ?: `
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
- {2 _0 h2 y4 x& A; i2002: 565-628.
2 D9 m9 X$ i& V+ y2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
- T, v7 `% `! v) U8 a) V* `puberty in children with tumours of the suprasellar pineal
4 U: U$ O y2 M) C, O% Qat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
% }# r/ M" Q8 t" rTopical Testosterone Exposure / Bhowmick et al 543' j2 `, m0 V/ F& D6 Z+ }
areas: organic central precocious puberty. Acta Paediatr.
- P4 x: E3 e0 Z% z# j. _2001;90:751-756.
7 b* C* ]8 _3 ]3 K3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
& |" K! m: g3 M0 rPediatric Endocrinology. 4th ed. New York, NY: Marcel
0 K* E. U! N& JDekker Inc; 2003:211-238.
2 w8 J8 x) F1 }4 I4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
, c, ^2 K# A# Cdevelopment in a two-year-old boy induced by topical% k+ m0 _" z" g% |# x+ h0 F1 [' l
exposure to testosterone. Pediatrics. 1999;104:e23.
W6 S/ K7 O+ F5 k4 B2 r5. Greulich WW, Pyle SI, eds. Radiographic Atlas of) _$ n. S _/ Z
Skeletal Development of the Hand and Wrist. 2nd ed.: A! H# u4 F' }- E+ X" R
Stanford, CA: Stanford University Press; 1959.( b+ i+ P9 ~- V0 @) ^0 W5 A) L
6. Physicians’ Desk Reference. Androgel 1% testosterone,( u. g2 R/ B9 K2 _/ L1 A F# M
Unimed Pharmaceutical Inc. Montvale, NJ: Medical+ T6 Z& B, S3 f I9 h
Economics Company, Inc; 2004:3239-3241.1 F9 H# _. G8 O8 H# M* M
7. Klugo RC, Cerny JC. Response of micropenis to topical
4 {+ x9 ]. A2 C6 | etestosterone and gonadotropin. J Urol. 1978;119:
7 n9 W' W+ u1 r+ ^667-668." D2 u6 X- [$ C( j4 m6 s) R8 [
8. Guthrie RD, Smith DW, Graham CB. Testosterone8 v6 R( u- W" f7 Z8 x' f4 \
treatment for micropenis during early childhood. J Pediatr.4 p8 K2 Z( m M; j' F( k
1973;83:247-252." O9 O O0 `7 P, E/ T5 q- T
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone) {4 T8 v1 I! d' p ^$ X
therapy for penile growth. Urol. 1975;6:708-710.! h1 W* F8 a- x- z7 O0 R2 `
10. Husmann DA, Cain MP. Microphallus: eventual phallic
* p. e! C% u- {( j O$ v6 `size is dependent on the timing of androgen administra-
, E- x, N# Y1 L& n3 a, ^1 vtion. J Urol. 1994;152:734-739.
( g( o( ^; r9 t/ N+ b/ F1 H11. McMahon DR, Kramer SA, Husmann DA. Micropenis:$ j4 N- P9 C2 R$ t# {" h; v
does early treatment with testosterone do more harm
6 ^* f* } Y [5 I+ `than good? J Urol. 1995;154:825-829.2 C2 P" |; z& t" Z* h* w. O( t
12. Takane KK, George FW, Wilson JD. Androgen receptor+ F5 J; s6 f3 `5 ~& h0 Z2 i: y7 j
of rat penis is down-regulated by androgen. Am J Physiol.
8 R9 c+ ^8 {* V5 b1990;258:E46-E50.. A# [ y! {6 h, W
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect/ q& \4 B! Z# I, e( n
of prepubertal androgen exposure on adult penile+ I% p: n: J7 z8 I$ Z9 ~
length. J Urol. 1996;156:783-787. |
|