- 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. Central9 [7 L. w; n! f4 M, j0 q1 a
precocious puberty (CPP), which is mediated2 l; B/ w, r; v7 n+ V# l
through the hypothalamic pituitary gonadal axis, has4 L# L& Y* Y9 T Y/ Z: h
a higher incidence of organic central nervous system4 j$ ~8 m T. S+ f
lesions in boys.1,2 Virilization in boys, as manifested5 z0 {+ N Y# b- W, N1 o/ q
by enlargement of the penis, development of pubic
6 d( a! {; {) I, X* S+ y" k8 O. shair, and facial acne without enlargement of testi-
# |! o& o( ]* f$ O% Ecles, suggests peripheral or pseudopuberty.1-3 We/ D4 c' C/ a- F" w$ _. r9 D
report a 16-month-old boy who presented with the, ^1 ` l3 F# G8 L* X8 t
enlargement of the phallus and pubic hair develop-1 t. s6 m9 {( M0 C0 g2 o& W4 G3 S$ _
ment without testicular enlargement, which was due
* \9 Z& W5 w# g P! W" c5 ^0 x! sto the unintentional exposure to androgen gel used by
' e* t/ A, D- ^the father. The family initially concealed this infor-' b# T4 r8 X/ G& H" L
mation, resulting in an extensive work-up for this b9 l' W4 G4 }% H
child. Given the widespread and easy availability of' I7 X( x: C& ?: Z' q. I& x0 M
testosterone gel and cream, we believe this is proba-
2 B5 @# f( S- n) L' H! i c8 Jbly more common than the rare case report in the
7 C9 K2 |# ?% x4 ?literature.4
" o a E3 s2 j% p+ e' TPatient Report) h: J0 X, V5 b3 c* O9 A$ ]
A 16-month-old white child was referred to the% u& r1 Q* k+ u+ H
endocrine clinic by his pediatrician with the concern
3 l. O. E: p& E4 C4 a5 {of early sexual development. His mother noticed: @) z1 s0 L1 h' ~
light colored pubic hair development when he was
& D. j1 D9 n7 J, V5 k7 o8 OFrom the 1Division of Pediatric Endocrinology, 2University of4 W9 K0 I! C. V
South Alabama Medical Center, Mobile, Alabama.% C" Y$ l2 D' H
Address correspondence to: Samar K. Bhowmick, MD, FACE,
3 x( V1 k7 l0 |Professor of Pediatrics, University of South Alabama, College of# f) A5 ~5 d8 ~/ z
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
5 B, K0 J) O; H* P" w" H! Je-mail: [email protected].1 }: C+ ~; F! [$ r) L7 T7 R
about 6 to 7 months old, which progressively became
& C% x, _# G5 b9 |darker. She was also concerned about the enlarge-1 h) @$ S/ C6 S/ d1 E" \6 s
ment of his penis and frequent erections. The child
" v( Z3 M. O- ~6 cwas the product of a full-term normal delivery, with8 g* S3 ]# K" H6 l4 z3 Z/ y& R
a birth weight of 7 lb 14 oz, and birth length of
$ }- j9 Q2 e& F) X$ s20 inches. He was breast-fed throughout the first year
4 @) h2 Z d/ I+ S t7 Tof life and was still receiving breast milk along with
3 v1 o; \* A+ A/ J" `& Ysolid food. He had no hospitalizations or surgery,1 ^$ X# a6 A- R# F
and his psychosocial and psychomotor development
" j9 M& p* l0 R E! m) Mwas age appropriate.0 W3 y/ D0 J- Y1 w1 V) Y! n
The family history was remarkable for the father,
* P& G' p5 o: h# ywho was diagnosed with hypothyroidism at age 16,2 T2 ~1 i- P: V' l1 s% J
which was treated with thyroxine. The father’s! Q) c! l ^; `0 B; H) P! N5 V$ \7 @
height was 6 feet, and he went through a somewhat
8 ~2 D3 m H8 i1 _ c( F2 r9 vearly puberty and had stopped growing by age 14.: {' ]0 _8 U% P9 c5 m
The father denied taking any other medication. The. R/ \( d4 m' A7 r5 L& M
child’s mother was in good health. Her menarche+ _1 H' S$ i: n! b
was at 11 years of age, and her height was at 5 feet3 C" R2 X* F1 {) s9 l
5 inches. There was no other family history of pre-
" w$ K. u! V, G0 Ucocious sexual development in the first-degree rela-
1 Y0 T0 H4 ~4 M9 H+ w+ L* u4 x8 Etives. There were no siblings.1 v- B% v+ N9 {$ x$ F
Physical Examination- I. R/ R- E- ?) n
The physical examination revealed a very active, y9 {+ A/ \; y4 v( ?; t M9 |$ i, o7 j
playful, and healthy boy. The vital signs documented0 ?1 i0 @( r) h0 h9 N5 J- ?9 b
a blood pressure of 85/50 mm Hg, his length was
' x* Y3 }5 ]1 d. b1 i* F90 cm (>97th percentile), and his weight was 14.4 kg
( G. V$ ` H, O, c6 d9 N(also >97th percentile). The observed yearly growth
" @ D; d5 y0 D: m! G7 C7 x& Nvelocity was 30 cm (12 inches). The examination of8 h: ~& w2 C( J& e @6 t- V, k
the neck revealed no thyroid enlargement.* j, X* E) @6 Z" @0 { z2 Z5 A
The genitourinary examination was remarkable for5 K, O& N$ W9 b8 n7 A
enlargement of the penis, with a stretched length of4 O$ e3 u; J" R7 S4 Q
8 cm and a width of 2 cm. The glans penis was very well' D. N* @3 t: ?
developed. The pubic hair was Tanner II, mostly around) G7 R% `' h- H0 V
540" b/ i7 e3 l0 S' \5 P: T# q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from4 a2 m. } k' i3 Y
the base of the phallus and was dark and curled. The
1 e! ]# [ f$ J: x- b& Ctesticular volume was prepubertal at 2 mL each.
7 _8 `* N) }) G( g# i( s! sThe skin was moist and smooth and somewhat
1 P+ D3 O6 D( D8 poily. No axillary hair was noted. There were no
1 Q" x- n! m+ o! r8 O& w ~! v9 Wabnormal skin pigmentations or café-au-lait spots.8 E. A9 H+ c$ I+ |) A
Neurologic evaluation showed deep tendon reflex 2+% i t m' p/ k& n, C
bilateral and symmetrical. There was no suggestion- T5 ^6 B& e" t) ^5 k. R8 Z
of papilledema.
7 O: A/ {* [# U# ?6 E8 L' YLaboratory Evaluation
' D- _" c* p% M, \: t+ m/ `/ XThe bone age was consistent with 28 months by$ O* C D+ K0 ~4 Q: a% a& }. P6 {
using the standard of Greulich and Pyle at a chrono-3 ^ R. R& V5 u* S& G6 _
logic age of 16 months (advanced).5 Chromosomal. A" Q- ]9 Z% S5 B+ U' e( T: m
karyotype was 46XY. The thyroid function test
, N8 ]! z3 a7 }' B- nshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
; M8 a( R: m' T4 `, N2 L" ~. H Dlating hormone level was 1.3 µIU/mL (both normal).2 v8 }: @- `1 K8 I1 Y
The concentrations of serum electrolytes, blood
4 A% X6 L L# x1 h8 M$ ^- _urea nitrogen, creatinine, and calcium all were$ T5 O- s" [1 o, }
within normal range for his age. The concentration
$ W: u) ^, q3 v( Q+ Aof serum 17-hydroxyprogesterone was 16 ng/dL! z: _5 D$ m7 } S
(normal, 3 to 90 ng/dL), androstenedione was 203 c, W# f! h; _6 f) n0 {
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
+ Y2 g; e$ R' m; b' Gterone was 38 ng/dL (normal, 50 to 760 ng/dL),
9 v6 }$ a1 n# r7 n- M- T, @: Pdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
8 R( n0 ]( D. H ]) c& ]+ y+ t49ng/dL), 11-desoxycortisol (specific compound S)
2 ~. G# q6 c8 r9 W. G. e0 I1 zwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ y4 l, @" k. atisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total9 [& f* x* H7 a4 f2 s
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),7 ^4 v V5 R. M; t6 C5 E1 B+ h# z0 r
and β-human chorionic gonadotropin was less than$ h$ {4 D0 h( C
5 mIU/mL (normal <5 mIU/mL). Serum follicular- x) i1 Q( H9 T- i7 m
stimulating hormone and leuteinizing hormone
3 _2 U) u) r4 w* P; lconcentrations were less than 0.05 mIU/mL9 Y( n' H( b }8 n
(prepubertal).0 x' N% k3 r1 V8 G: ?: j0 p
The parents were notified about the laboratory8 P% X, N9 F+ v' @2 y8 p
results and were informed that all of the tests were7 a, z1 y; r0 g0 ] @- g+ U
normal except the testosterone level was high. The) Q f1 a- U, ?* K
follow-up visit was arranged within a few weeks to
6 ?* ^0 `; |0 T' p$ R. Tobtain testicular and abdominal sonograms; how-
9 L6 ^. {. S& d' r1 Z& a( Yever, the family did not return for 4 months.7 E6 r' `2 f7 F2 ?7 d+ B; k
Physical examination at this time revealed that the
- q+ J, @% Y# L. s6 Zchild had grown 2.5 cm in 4 months and had gained
: C# V8 `4 n! Q' a: ?2 kg of weight. Physical examination remained; U o5 A! x! j& z6 u
unchanged. Surprisingly, the pubic hair almost com-
( \# t/ [ }7 Y5 a7 Y& gpletely disappeared except for a few vellous hairs at
$ f: o3 e8 h" N" Q/ fthe base of the phallus. Testicular volume was still 2
- ~. i8 O# m O* R# C: ZmL, and the size of the penis remained unchanged.8 j" n; ~0 X$ k" h; j
The mother also said that the boy was no longer hav-0 ?" g$ T; }" c4 I, L* {
ing frequent erections.
3 I1 P2 k) X4 N8 u( f( |Both parents were again questioned about use of
4 D, h N9 _. M: @3 Kany ointment/creams that they may have applied to: e% r. O) e! U" d6 |& R- N* X/ C
the child’s skin. This time the father admitted the
5 C$ r- O5 J$ n% ]Topical Testosterone Exposure / Bhowmick et al 541
: M& [* @, r& }. t ^use of testosterone gel twice daily that he was apply-! a# _- r% A! l4 e% A
ing over his own shoulders, chest, and back area for
# m1 ]3 J# p' s; ?. za year. The father also revealed he was embarrassed
! J7 m( h: U; T) R# Q' z% F; Lto disclose that he was using a testosterone gel pre-9 K6 X; p6 \) S6 H: S6 |4 @
scribed by his family physician for decreased libido, V$ [ `% r" j$ {9 A2 D: X
secondary to depression.
( p9 J' W D- Q1 [: X" \The child slept in the same bed with parents.3 A: Z7 `5 B. i
The father would hug the baby and hold him on his& \* z5 }- @ @) P F$ O
chest for a considerable period of time, causing sig-4 s) I4 K! Z' ~
nificant bare skin contact between baby and father.
& q4 ?+ r! p* }' F9 Z- S i1 ZThe father also admitted that after the phone call,; c- s3 X6 B1 e, I" o4 j" U& n! W# H
when he learned the testosterone level in the baby
9 Y; a, W; k# ]7 ?: U2 bwas high, he then read the product information/ u2 a( }: e0 z! k% N9 ~/ h* X# D
packet and concluded that it was most likely the rea-
1 a. m+ {/ H( G. t2 R xson for the child’s virilization. At that time, they
2 G7 f: R1 P: q+ m( Wdecided to put the baby in a separate bed, and the
* Y- g& t; R& @+ h/ }/ _9 Lfather was not hugging him with bare skin and had
0 C$ V$ z" _8 u% abeen using protective clothing. A repeat testosterone
6 {$ c+ R! A8 T. i& htest was ordered, but the family did not go to the
+ e1 c# @8 o& h4 Tlaboratory to obtain the test.
O4 _ W1 i! v6 b" F2 } tDiscussion3 C% o0 E: b f6 E: i) r
Precocious puberty in boys is defined as secondary
( x/ H) x( X4 g9 y: C5 jsexual development before 9 years of age.1,4
$ v9 `, V2 W: @# E1 NPrecocious puberty is termed as central (true) when
- X+ m& w' B) ?! D8 [/ Z6 _it is caused by the premature activation of hypo-: w- d8 @8 [5 B3 g i
thalamic pituitary gonadal axis. CPP is more com-8 S# ~6 r9 a+ |, ~
mon in girls than in boys.1,3 Most boys with CPP
5 N& d* s) S8 g! l5 omay have a central nervous system lesion that is
& ]+ Y* p1 Z4 S1 U" J, }! Nresponsible for the early activation of the hypothal-5 V6 M( |, N7 v
amic pituitary gonadal axis.1-3 Thus, greater empha-
4 b5 w% ?% \5 B; G# L- ?; c8 J( ~sis has been given to neuroradiologic imaging in
4 L* T8 A; [- C5 D# lboys with precocious puberty. In addition to viril-
4 I/ f% H9 H, \% [; g4 X# m2 Rization, the clinical hallmark of CPP is the symmet-
# T: t$ k% c6 U: O3 ], Mrical testicular growth secondary to stimulation by6 F _: ]) h- i/ n' Q
gonadotropins.1,3
; s6 m, [# }5 y1 h7 K; z6 UGonadotropin-independent peripheral preco-
2 ?+ `7 v8 d [% `4 ?1 m( i. h+ u! Jcious puberty in boys also results from inappropriate5 G+ t0 G! b2 O/ S; K
androgenic stimulation from either endogenous or
3 D9 g5 b4 M8 Sexogenous sources, nonpituitary gonadotropin stim-' c8 v7 L/ S* B4 V2 t' g
ulation, and rare activating mutations.3 Virilizing) X5 R8 {, P7 D; `1 }
congenital adrenal hyperplasia producing excessive7 E" q; o0 s$ a. Z, P5 a
adrenal androgens is a common cause of precocious- ?9 Z0 w; G! x% V6 ` ~! g) B2 H
puberty in boys.3,4
2 I1 v F' |7 |, d% O7 {- z0 ^The most common form of congenital adrenal
& N! ~$ M: B6 ]3 T. ~ vhyperplasia is the 21-hydroxylase enzyme deficiency.
' k# y0 E6 |5 v5 } s" |The 11-β hydroxylase deficiency may also result in' k9 K5 v) L' V, U. |4 R+ E
excessive adrenal androgen production, and rarely,
/ D$ n* W' n( G# s& _an adrenal tumor may also cause adrenal androgen
8 g7 j1 B5 M4 o7 }9 ]excess.1,3
0 }( }) a e3 kat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. u' h$ m {. ^$ T, C8 l542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
" z7 P. y2 _8 @: Y0 fA unique entity of male-limited gonadotropin-
5 V: x9 Z" H- V( i) k9 Zindependent precocious puberty, which is also known0 L* b% p- I7 p" ]0 }7 r
as testotoxicosis, may cause precocious puberty at a
$ I' A4 N( k: }very young age. The physical findings in these boys
6 d+ c9 }1 @( L) F# r5 j2 y0 hwith this disorder are full pubertal development,
' O8 I+ }* A5 ?+ B) f. jincluding bilateral testicular growth, similar to boys, s3 [9 [, a- ?4 N/ x# E1 t, s
with CPP. The gonadotropin levels in this disorder2 | P! s G0 l& y# Q
are suppressed to prepubertal levels and do not show
* `4 H" V2 {( \pubertal response of gonadotropin after gonadotropin-
$ C5 @6 j5 G& Z7 x2 V# freleasing hormone stimulation. This is a sex-linked7 B/ A: N/ D( A/ U
autosomal dominant disorder that affects only6 u! a9 ~( p) I8 Z% W" r& D
males; therefore, other male members of the family6 P, K o9 x1 d) f8 E
may have similar precocious puberty.3
2 C' R0 S6 a1 F1 CIn our patient, physical examination was incon-
- H' {, O9 A$ E& E' xsistent with true precocious puberty since his testi-' `- }: W& R8 W! G7 ^
cles were prepubertal in size. However, testotoxicosis( C) T0 x6 R& c9 C3 D0 K
was in the differential diagnosis because his father
6 f) J3 A3 X* | R0 Wstarted puberty somewhat early, and occasionally,
' a" b2 J3 _& e! p9 ]testicular enlargement is not that evident in the
5 v% P$ M- Z. T* q3 O+ b$ W% Ybeginning of this process.1 In the absence of a neg-
4 y% a" u/ K; ?0 P2 h8 ^ative initial history of androgen exposure, our
8 f# Z( p0 C& E, ?biggest concern was virilizing adrenal hyperplasia,4 _) b, F% w; m" P" N8 |* ?: L$ G
either 21-hydroxylase deficiency or 11-β hydroxylase2 A4 H z! P5 X* Z+ q
deficiency. Those diagnoses were excluded by find-$ ]* u c: e2 _
ing the normal level of adrenal steroids.' i7 \# L4 J; V6 X- ^, a7 ]* |
The diagnosis of exogenous androgens was strongly0 x8 ~$ V( N Z3 ~0 G! @
suspected in a follow-up visit after 4 months because
: R B* C- P4 othe physical examination revealed the complete disap-
& T' I& \/ w. w( q; \# ]7 Qpearance of pubic hair, normal growth velocity, and4 j! I# u; s$ J6 G' k5 n
decreased erections. The father admitted using a testos-
) n8 t$ v. f1 Q; [% Tterone gel, which he concealed at first visit. He was- ?6 t6 T7 g4 k* [
using it rather frequently, twice a day. The Physicians’
0 @- c7 L8 K3 QDesk Reference, or package insert of this product, gel or
, P* o! s& Z: x) {* T, G( n* d& Hcream, cautions about dermal testosterone transfer to
0 }& [, L7 j" m5 o sunprotected females through direct skin exposure.
, N; ?& L) E0 ^; s( N7 l* n0 |# m. \Serum testosterone level was found to be 2 times the
3 F2 [& s; q: t. I# L, y& J4 Xbaseline value in those females who were exposed to
; ]$ u' e& q. l, h% l0 O4 W4 _even 15 minutes of direct skin contact with their male" D! t8 g- Z: B6 Q6 i
partners.6 However, when a shirt covered the applica-
3 U% ?3 z3 F4 y O+ i; mtion site, this testosterone transfer was prevented.
1 z% Q# z1 d' M( WOur patient’s testosterone level was 60 ng/mL,
6 Q1 m! |) I% T8 \$ V% ^6 Y" z( b, L4 qwhich was clearly high. Some studies suggest that) h2 s6 F7 b) M+ h' o
dermal conversion of testosterone to dihydrotestos-) I& C7 K, U/ Z. z. I
terone, which is a more potent metabolite, is more$ x9 @2 ^8 c$ L2 C7 Q+ ^; z
active in young children exposed to testosterone7 t: H" E7 k9 s5 {
exogenously7; however, we did not measure a dihy-% z8 \! {; R; s" U4 {' S' ~) B
drotestosterone level in our patient. In addition to* q( x+ \/ w; @2 l U
virilization, exposure to exogenous testosterone in9 |( E$ x% C; ^% X% z' L
children results in an increase in growth velocity and
. A+ i# R2 |: W2 R6 o$ ?9 Aadvanced bone age, as seen in our patient.8 J n, L5 Y' J
The long-term effect of androgen exposure during
; d3 R5 X+ `$ `0 f4 i6 J% G8 Xearly childhood on pubertal development and final
8 e& P8 q5 ^# nadult height are not fully known and always remain
% [2 O Q& a* s$ e- Ta concern. Children treated with short-term testos-3 s( ~; n6 J6 T: s j- L1 A: E
terone injection or topical androgen may exhibit some$ ]+ t3 }% J1 g/ l7 Z
acceleration of the skeletal maturation; however, after4 F( P+ G/ x' {' u- A
cessation of treatment, the rate of bone maturation& ~$ |# S. r( ^' j: J* x
decelerates and gradually returns to normal.8,9
) d6 k. r5 J3 K! SThere are conflicting reports and controversy
8 @' d6 z4 r2 H% d5 ~ L8 \3 yover the effect of early androgen exposure on adult; O. ^8 I. G. q0 {. C( {8 X
penile length.10,11 Some reports suggest subnormal
5 s( U& K/ {. v+ k0 uadult penile length, apparently because of downreg-! }& D+ C3 ~; h- }# p5 \
ulation of androgen receptor number.10,12 However,
: F8 O' \! {* vSutherland et al13 did not find a correlation between/ ?- ~ R2 V' p0 H
childhood testosterone exposure and reduced adult8 v# R2 |4 W4 l6 l4 B
penile length in clinical studies.
; R$ A4 I- h- y+ g. g# CNonetheless, we do not believe our patient is' \1 T3 f- _/ u- y
going to experience any of the untoward effects from7 q$ m" }( n# c6 U$ }+ h3 T
testosterone exposure as mentioned earlier because( J: |" Q3 S' o. Q! Q
the exposure was not for a prolonged period of time.
+ y& E$ ]: \3 Q+ m& bAlthough the bone age was advanced at the time of
& ]- i6 F; a# ~, u' Hdiagnosis, the child had a normal growth velocity at
5 N8 J H9 C% R. Dthe follow-up visit. It is hoped that his final adult7 X. L7 S6 }# w7 v, `2 H* P
height will not be affected.& ]" J& M8 G8 h8 r& u
Although rarely reported, the widespread avail-9 s8 Y7 V8 P: @1 g: H
ability of androgen products in our society may1 Z7 Z/ y- q! ?, Q
indeed cause more virilization in male or female
a4 @& j2 [$ M% r5 j+ W/ ochildren than one would realize. Exposure to andro-. K! p% v" V! e& T2 E. K) `
gen products must be considered and specific ques-; D0 H8 l# _" _8 b! d2 \
tioning about the use of a testosterone product or/ R9 j* u3 \& ~1 W
gel should be asked of the family members during; Q$ A; e1 w: l y1 v/ o
the evaluation of any children who present with vir-
$ s- j2 J5 t j- Silization or peripheral precocious puberty. The diag-9 I7 b' q, h3 M$ A- v
nosis can be established by just a few tests and by
( T9 S' n+ ~+ _4 v) g2 ]6 Kappropriate history. The inability to obtain such a
6 n: H' h7 E7 Nhistory, or failure to ask the specific questions, may4 k+ Z8 |% {0 E
result in extensive, unnecessary, and expensive m8 Q8 s/ f# J1 v |1 B, [2 v) c5 U( t
investigation. The primary care physician should be
$ J9 S2 {+ L& i, b( |# [aware of this fact, because most of these children E/ t( l |: y( E4 q1 e/ M
may initially present in their practice. The Physicians’3 J5 S) s+ U( U& n, q
Desk Reference and package insert should also put a
! R+ J; \: \. V3 J f/ n& Fwarning about the virilizing effect on a male or- `+ y. n4 K/ F- g! |! C
female child who might come in contact with some-3 g) T8 ?! r. G2 O$ P
one using any of these products.) W7 Y3 M, N: X$ r3 M# f, m
References/ n) f2 u9 t0 }" G, T9 p
1. Styne DM. The testes: disorder of sexual differentiation
% t: v7 K* K4 O8 tand puberty in the male. In: Sperling MA, ed. Pediatric
; I, D7 K. N4 f$ X5 s% f8 O |7 K6 j8 XEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
$ I$ d( l4 }% f) p+ c2002: 565-628." b2 r0 O* _: i8 [
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
( n( y& q( @, N- f) N) Gpuberty in children with tumours of the suprasellar pineal
. P/ F( D; r \' T2 {! Hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 {6 v! j1 T- O3 P, }& x, Y7 m6 HTopical Testosterone Exposure / Bhowmick et al 543
% B1 j+ ^- E" n5 Mareas: organic central precocious puberty. Acta Paediatr.
s! C: n) z# _, z, x: j2001;90:751-756.3 F" H6 D7 q) e
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed., U3 `( L3 ~( y; b$ _- }, D) h
Pediatric Endocrinology. 4th ed. New York, NY: Marcel, ?2 \/ Q3 ?6 V3 I1 X9 J
Dekker Inc; 2003:211-238., o) H4 O: r1 M5 n' H* a
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual7 m- I( y, }9 N
development in a two-year-old boy induced by topical
$ e! a% A/ }, {# ^0 A$ }' ~& O V5 `) dexposure to testosterone. Pediatrics. 1999;104:e23.4 G% i/ f, ?) K/ w9 D# V
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
# D0 U$ o8 A8 y8 R8 S& GSkeletal Development of the Hand and Wrist. 2nd ed.+ x1 a% @1 A7 A* P* F
Stanford, CA: Stanford University Press; 1959.7 U2 ~( m/ T3 c; |- G) t/ r( k
6. Physicians’ Desk Reference. Androgel 1% testosterone,
1 z, `: k4 y9 f1 UUnimed Pharmaceutical Inc. Montvale, NJ: Medical
0 N4 u5 Z# u+ ~# }5 \Economics Company, Inc; 2004:3239-3241.5 {. a$ c* C0 C3 |# n" W' a! Q
7. Klugo RC, Cerny JC. Response of micropenis to topical
" W1 z ^# W' [# h5 W; k( f8 dtestosterone and gonadotropin. J Urol. 1978;119:1 y, U6 u8 g, B1 p
667-668.
/ b. R0 M% D$ t2 n4 L. U7 X8. Guthrie RD, Smith DW, Graham CB. Testosterone$ C3 S1 T) j- X4 P3 H
treatment for micropenis during early childhood. J Pediatr.
, J1 [7 H/ Q0 n7 A: ?+ P i. |1973;83:247-252.: ~' M! P! C, Y# N" K% n' R. O
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
& i# ^6 y. s7 P9 _therapy for penile growth. Urol. 1975;6:708-710.9 S7 G6 Y. ]& m+ n+ \4 b) U
10. Husmann DA, Cain MP. Microphallus: eventual phallic w" F8 k- _8 z& u
size is dependent on the timing of androgen administra-; B5 d$ r5 ~# e" x* }
tion. J Urol. 1994;152:734-739.
3 a6 |- p1 `- c11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
0 s) \8 \3 |0 x; U) `does early treatment with testosterone do more harm
$ B$ W4 `6 h% K4 t6 s ~than good? J Urol. 1995;154:825-829.
6 g% `1 f2 |7 W8 c# H9 i+ m' x% `* \12. Takane KK, George FW, Wilson JD. Androgen receptor" K, @6 t- h# x5 g3 j
of rat penis is down-regulated by androgen. Am J Physiol./ L' o% ]& x& s% f3 L+ c
1990;258:E46-E50.. @* R' x8 d J5 U6 p( U( g: u
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
1 H: Z" `: J4 @7 E n" w( G1 n3 Uof prepubertal androgen exposure on adult penile
3 f( E+ y8 T' mlength. J Urol. 1996;156:783-787. |
|