- 註冊時間
- 2023-5-6
- 精華
- 在線時間
- 小時
- 米币
-
- 最後登錄
- 1970-1-1
累計簽到:5 天 連續簽到:1 天
|
發表於 2025-1-4 03:38:58
|
顯示全部樓層
is a significant concern for physicians. Central
3 e7 C5 P5 f) C/ C+ Xprecocious puberty (CPP), which is mediated" c% f4 z: K R# r$ `1 `
through the hypothalamic pituitary gonadal axis, has% i) r2 j( R3 A& w
a higher incidence of organic central nervous system. h& Z0 g/ H8 \: D
lesions in boys.1,2 Virilization in boys, as manifested# H+ v" u5 \" E$ j! @; z/ N
by enlargement of the penis, development of pubic
) C* b, e8 O& Bhair, and facial acne without enlargement of testi-
" K) S2 L! t8 K0 P+ n; v4 ecles, suggests peripheral or pseudopuberty.1-3 We
/ S$ Q. J$ J( ?: S' Kreport a 16-month-old boy who presented with the: D/ N, s0 o4 b x; a( c, A4 q! g, \3 [
enlargement of the phallus and pubic hair develop-
" L! v$ l& T: R/ d' O. o4 h' [ment without testicular enlargement, which was due
7 J( g4 H7 O4 W' A: s1 \0 Ito the unintentional exposure to androgen gel used by0 k# R8 R; e# f1 C2 e2 W4 ^6 |
the father. The family initially concealed this infor-
; C Z. R: f! Q; M) J1 L& h: Kmation, resulting in an extensive work-up for this
. L$ ~5 G+ u3 i- Xchild. Given the widespread and easy availability of
0 g' q% K! h5 A7 d4 M4 {7 ~3 Xtestosterone gel and cream, we believe this is proba-
$ j+ ^1 b# }, v# i9 Vbly more common than the rare case report in the5 f' p3 h* b6 g' o# h
literature.4% Z! o1 W) @, n! y4 H7 H4 y
Patient Report- x' v1 X' R$ R& T" D7 k( V
A 16-month-old white child was referred to the+ }8 V+ U; v0 Q" v
endocrine clinic by his pediatrician with the concern n4 B5 W! p$ ?* n! [
of early sexual development. His mother noticed+ M/ u- q3 ~7 _) f8 @
light colored pubic hair development when he was* A- |5 T. v$ } @
From the 1Division of Pediatric Endocrinology, 2University of
5 T3 Q- q0 a4 V( s4 e9 @3 KSouth Alabama Medical Center, Mobile, Alabama.. K( S5 ]5 W& \9 \
Address correspondence to: Samar K. Bhowmick, MD, FACE,: a5 W) y+ e! j, {. R# j( m+ w2 F
Professor of Pediatrics, University of South Alabama, College of2 d/ y" m, l Z1 y1 F
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
4 h) o* Z7 a, x# D; F2 `$ c* R% ke-mail: [email protected].
2 w; R( F! v( W! Rabout 6 to 7 months old, which progressively became
7 u e3 h: v4 Ydarker. She was also concerned about the enlarge-
+ P* K. \; A- Sment of his penis and frequent erections. The child
9 a, q$ F; |6 ^! d4 ^; \$ @was the product of a full-term normal delivery, with! T* A: `. k8 a) R1 a
a birth weight of 7 lb 14 oz, and birth length of
; g) z$ A Z+ e: [4 }20 inches. He was breast-fed throughout the first year( B2 l- V# ^+ U2 {) `2 C: Q; v
of life and was still receiving breast milk along with& h8 d* y) @2 t
solid food. He had no hospitalizations or surgery,
( V8 j+ q4 w' X' T: O& u9 h0 `and his psychosocial and psychomotor development/ j* j) p* @7 `0 v9 z$ h5 H8 b4 M
was age appropriate.
5 M, b3 W* b4 L7 {1 G! D9 XThe family history was remarkable for the father,
; u' v2 v3 X6 z6 C+ p5 m( Ywho was diagnosed with hypothyroidism at age 16,
1 }6 C' A6 `' s& ? f+ n9 i2 {which was treated with thyroxine. The father’s* o8 H+ [& i5 T
height was 6 feet, and he went through a somewhat& P p# T: S/ o, [0 e2 a# s
early puberty and had stopped growing by age 14.& @! ^7 V1 G* @+ U9 Y7 z
The father denied taking any other medication. The- @" i8 Y' x$ k# J1 e2 V
child’s mother was in good health. Her menarche% P1 Q3 j- X, M1 K$ E4 \
was at 11 years of age, and her height was at 5 feet7 j% k: s! i. r# S+ A
5 inches. There was no other family history of pre- C; x, m0 h4 M, H
cocious sexual development in the first-degree rela-
. N% t4 p( c! p+ j1 [$ ytives. There were no siblings.7 [7 ]* h2 O8 V6 |
Physical Examination& A0 f1 H$ I" E- a) h& P
The physical examination revealed a very active,
% d8 v1 _$ i o* F( Vplayful, and healthy boy. The vital signs documented
- d0 l3 C. H3 s2 `! i, D/ Wa blood pressure of 85/50 mm Hg, his length was( X# R/ n; \7 o& e* D" J6 ]) F/ j& u
90 cm (>97th percentile), and his weight was 14.4 kg1 ^6 a5 B6 Y4 w1 G7 Y1 n
(also >97th percentile). The observed yearly growth
! b) x, H3 G1 u! w- lvelocity was 30 cm (12 inches). The examination of* F C8 X8 C% P( d7 [/ h
the neck revealed no thyroid enlargement.
) `$ q+ W: ^5 i/ sThe genitourinary examination was remarkable for
( @( v: x4 h8 m0 i. l! x; e4 e, ^enlargement of the penis, with a stretched length of$ @ |3 h' X6 m
8 cm and a width of 2 cm. The glans penis was very well
d, @+ M$ L4 Q3 \; D0 F$ c/ Wdeveloped. The pubic hair was Tanner II, mostly around
/ w! t' o5 M9 U540
; A) |( h4 n* B, D7 M: Z Zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
6 a, C* s" J9 C; K$ wthe base of the phallus and was dark and curled. The
]( o: m" D2 Y9 r' i* etesticular volume was prepubertal at 2 mL each.( E7 g. s0 U: z, n& x& ]9 a
The skin was moist and smooth and somewhat
+ |5 h' S3 C0 Q) a G! {9 g4 foily. No axillary hair was noted. There were no
4 f' ^6 @; D P6 g7 V% xabnormal skin pigmentations or café-au-lait spots.
3 w$ f" d# ]' e+ E# bNeurologic evaluation showed deep tendon reflex 2+* x5 ?% [( Y% s4 ~- e1 Q! y
bilateral and symmetrical. There was no suggestion
f- \& n& r2 |. p' Aof papilledema.6 }( x9 G7 [$ s) O' N0 p, a
Laboratory Evaluation" k5 l8 O0 } t1 r) x G9 ~
The bone age was consistent with 28 months by
& a( e* m$ V; A% m9 I0 Rusing the standard of Greulich and Pyle at a chrono-
! Y l: |/ ]+ B8 f- y/ `1 n/ qlogic age of 16 months (advanced).5 Chromosomal
0 R: l; Z6 \7 }6 E. o) e* }$ F0 N2 Rkaryotype was 46XY. The thyroid function test, B( i/ |9 }6 f# v C1 F3 I; z8 H1 W5 a
showed a free T4 of 1.69 ng/dL, and thyroid stimu-1 @# n) ?& m y! l) i J' w
lating hormone level was 1.3 µIU/mL (both normal).
2 {' ]' T0 S9 ]1 J+ J% ^The concentrations of serum electrolytes, blood( b* h# N: Q9 f; {$ S$ m
urea nitrogen, creatinine, and calcium all were
\/ S D: e* A1 s2 s" B' ^0 _, ~within normal range for his age. The concentration# }$ w: C+ Q8 g
of serum 17-hydroxyprogesterone was 16 ng/dL
& p0 R" t. C" ^- X1 B(normal, 3 to 90 ng/dL), androstenedione was 20
2 |: G; f8 W9 T1 Hng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
8 Y; \+ h0 S R6 W/ c3 @terone was 38 ng/dL (normal, 50 to 760 ng/dL),
5 T- ?# m5 k( h$ sdesoxycorticosterone was 4.3 ng/dL (normal, 7 to! v4 `; T2 ^2 f, K+ S9 l: P+ m
49ng/dL), 11-desoxycortisol (specific compound S): Q! d0 N. p; [2 R
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
: F+ F- P8 B/ K% _8 [tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
7 e, y% U. z9 ltestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
5 |. Y' _: i9 gand β-human chorionic gonadotropin was less than
/ i; ?/ a* B) Q5 mIU/mL (normal <5 mIU/mL). Serum follicular% Q y3 k( w, B$ n- t. D y
stimulating hormone and leuteinizing hormone# e4 I1 q3 A4 j
concentrations were less than 0.05 mIU/mL
5 r3 W, c- K# Q: j# _/ O q(prepubertal).
3 W- C, t0 ?+ b& K7 T- NThe parents were notified about the laboratory
* h. L5 y! m* V& p" eresults and were informed that all of the tests were% F4 {% G* T H1 ?5 Q- w9 L
normal except the testosterone level was high. The
7 u* D* M5 }/ W6 i& w! u" `follow-up visit was arranged within a few weeks to4 x* [1 y3 j$ F X0 _% ^
obtain testicular and abdominal sonograms; how-
. {: ~" _! o% H1 ?ever, the family did not return for 4 months.
6 N5 u$ Y: h% E0 c2 u8 r5 WPhysical examination at this time revealed that the$ S" P+ q3 r7 g
child had grown 2.5 cm in 4 months and had gained
; z/ u$ \) t& E2 kg of weight. Physical examination remained" I+ t, E) N7 j5 @9 F
unchanged. Surprisingly, the pubic hair almost com-; p8 ?) r( X7 R
pletely disappeared except for a few vellous hairs at
5 W- ^( {6 s" p0 j, k: cthe base of the phallus. Testicular volume was still 2& w7 w! Q0 Q* P2 n( J8 p
mL, and the size of the penis remained unchanged.( F6 L4 _& z, E0 E5 l
The mother also said that the boy was no longer hav-6 E0 H8 i$ Z1 `( J; y/ c
ing frequent erections.2 j4 [; y) c/ n7 O$ u
Both parents were again questioned about use of5 h. {! j1 V' R6 o
any ointment/creams that they may have applied to
+ p# _4 t% K) _the child’s skin. This time the father admitted the, z3 F; V" ^% `! F
Topical Testosterone Exposure / Bhowmick et al 5413 W1 c. [- |: T
use of testosterone gel twice daily that he was apply-
8 A- d- I7 \! y7 e/ ring over his own shoulders, chest, and back area for* o$ n& U/ M# l. m8 O
a year. The father also revealed he was embarrassed: H4 W/ X+ t+ M4 l5 }
to disclose that he was using a testosterone gel pre-: C( y4 ?& r" _1 c
scribed by his family physician for decreased libido
2 f, g, i: V( `4 vsecondary to depression.
* i: G5 H2 s7 A" F$ L; sThe child slept in the same bed with parents.- |8 Z P, h1 L3 M) _) `. {
The father would hug the baby and hold him on his
% c O9 N, j9 R; Gchest for a considerable period of time, causing sig-; `5 `' a+ a' \
nificant bare skin contact between baby and father.
& f* k9 Q& s+ r6 q sThe father also admitted that after the phone call,
* J0 X0 V, z2 k; A! Iwhen he learned the testosterone level in the baby* A# z* u2 Q1 `% Y t
was high, he then read the product information7 j& |& d, u0 y; f9 Y# t, t
packet and concluded that it was most likely the rea-
1 \" ~1 `/ x' x, W k, rson for the child’s virilization. At that time, they3 k8 c" Q4 n0 c+ b1 O) B# t# Q( P
decided to put the baby in a separate bed, and the
( g4 x1 H1 g" W+ {- Lfather was not hugging him with bare skin and had
# x" R+ b- g: F' o+ gbeen using protective clothing. A repeat testosterone' j' z* N, o* ~' P
test was ordered, but the family did not go to the& _" `4 F q5 ~' {! x
laboratory to obtain the test.
7 S' W) A0 a( K) LDiscussion
3 B% L7 X' B$ E9 Q& WPrecocious puberty in boys is defined as secondary
# P" q+ u7 \* ^7 V, x& Msexual development before 9 years of age.1,4
4 b+ H# v* U6 a* W& k" v% g0 F+ D# PPrecocious puberty is termed as central (true) when4 O1 R9 a' l- |) |: ]( X
it is caused by the premature activation of hypo-
& S U( G: W3 B; j" ]( F8 U/ P' Dthalamic pituitary gonadal axis. CPP is more com-
) ]; C( {, J" R/ r, U9 j% ]2 Qmon in girls than in boys.1,3 Most boys with CPP6 w% b, v5 n5 ?: H# w7 Q# R) ?# j
may have a central nervous system lesion that is6 h- }' z' v8 O6 k
responsible for the early activation of the hypothal-
" u+ ]$ ~$ _" J2 a5 Yamic pituitary gonadal axis.1-3 Thus, greater empha-; \- n" m) P: q3 p5 H5 [+ ^# H0 {
sis has been given to neuroradiologic imaging in
" K( S& g4 q/ w) x% C: S5 q# kboys with precocious puberty. In addition to viril-9 [5 T1 Q/ d% Y/ E
ization, the clinical hallmark of CPP is the symmet-2 n& f- Q z$ e' {' W7 s
rical testicular growth secondary to stimulation by! y& \! o; Q' B! Y+ F9 ~& F
gonadotropins.1,3
$ G; ]# R- r. R1 w; `* RGonadotropin-independent peripheral preco-) _) }+ j$ s% n L
cious puberty in boys also results from inappropriate
# U' T' U1 |8 {% r: P$ qandrogenic stimulation from either endogenous or
' t: G& p5 p9 Sexogenous sources, nonpituitary gonadotropin stim-, ?* a6 Q) V1 h% M
ulation, and rare activating mutations.3 Virilizing
" x3 ?5 I- s) U$ F5 C+ Icongenital adrenal hyperplasia producing excessive
1 }8 [, [& `5 w: Jadrenal androgens is a common cause of precocious
8 q; i7 ~0 f* o9 T1 vpuberty in boys.3,4
1 T: R4 t5 Q# N$ oThe most common form of congenital adrenal
- K/ m$ o8 _& x( M' }4 w$ Shyperplasia is the 21-hydroxylase enzyme deficiency.
) I8 y5 O$ R! c3 m. H: [2 \7 e! lThe 11-β hydroxylase deficiency may also result in
. i& e2 ?9 g0 k7 xexcessive adrenal androgen production, and rarely,3 [' O* s {( `$ ?
an adrenal tumor may also cause adrenal androgen* o" [# M0 G* r5 {! Z$ ]
excess.1,34 d. `7 {9 E; J8 T
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. ^1 Y. d2 d" x- X8 X# ]7 c+ P
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
& h8 |7 K% s3 p" N. l5 qA unique entity of male-limited gonadotropin-
/ q* n# J8 L4 ] L9 b2 T9 Pindependent precocious puberty, which is also known
3 u* I9 E- a7 t. \5 zas testotoxicosis, may cause precocious puberty at a
$ d% t9 L3 A6 s4 N) Z4 I* S% xvery young age. The physical findings in these boys# k) t) l+ p, Z9 K3 q9 x
with this disorder are full pubertal development,
: L* H$ k# k S8 a" G Kincluding bilateral testicular growth, similar to boys8 @+ C p5 w7 ]8 h5 ]2 B/ q
with CPP. The gonadotropin levels in this disorder
- L, q+ N/ N! B( yare suppressed to prepubertal levels and do not show
( H4 |/ g; y5 i3 Ppubertal response of gonadotropin after gonadotropin-( z7 Z0 c+ I( V: Z* Q" g
releasing hormone stimulation. This is a sex-linked
( ?5 q8 d8 O! Y [$ m! I: T7 Wautosomal dominant disorder that affects only0 [" m! F1 g. N: A" w$ |' W' G
males; therefore, other male members of the family2 Z1 ?* ^$ L' F2 P3 f
may have similar precocious puberty.3& a% K, x( \1 X6 U0 M5 z' m
In our patient, physical examination was incon-
D4 }( S" s7 [$ _+ ysistent with true precocious puberty since his testi-
3 _" H3 f! M" G) Wcles were prepubertal in size. However, testotoxicosis4 [9 q# ]) W3 G; p, Y* m
was in the differential diagnosis because his father) a# A: l1 V% f: O
started puberty somewhat early, and occasionally,% r8 r+ x9 g. Z
testicular enlargement is not that evident in the- T3 o' u( p* O+ j# e/ h
beginning of this process.1 In the absence of a neg-* ^! a, z/ L2 Z# j+ K
ative initial history of androgen exposure, our, c5 n8 O+ [* X0 D. ~# S
biggest concern was virilizing adrenal hyperplasia,
. x i2 j$ |! E+ @* y' neither 21-hydroxylase deficiency or 11-β hydroxylase
8 L# x9 m( T$ Ndeficiency. Those diagnoses were excluded by find-' i, d( \" O7 H/ l3 c& E8 S
ing the normal level of adrenal steroids.2 z- C' e$ a& k* }6 B2 W) l1 x$ |
The diagnosis of exogenous androgens was strongly0 a( \/ `, u. F9 y% q$ q7 `5 ]3 \
suspected in a follow-up visit after 4 months because
9 ]: K- W" k3 n0 Othe physical examination revealed the complete disap-
* c) y% p& K) ipearance of pubic hair, normal growth velocity, and: x8 j/ j4 x0 U1 @
decreased erections. The father admitted using a testos-
" I5 A3 l- F5 @- o6 ?terone gel, which he concealed at first visit. He was' {" o' [% X4 e0 ?. }6 M- e% I/ B
using it rather frequently, twice a day. The Physicians’
, N% b& U7 _3 E6 E) K I5 pDesk Reference, or package insert of this product, gel or
- n/ J. R& ~, Acream, cautions about dermal testosterone transfer to
$ k& S. C+ H8 p& A! x( M* T; lunprotected females through direct skin exposure.. k0 ?, d0 p2 W2 w% @4 [7 K: ~
Serum testosterone level was found to be 2 times the
& l8 j8 l$ y8 i8 p4 ^; A8 D z6 [baseline value in those females who were exposed to! R: j$ J4 U; s* M' k. K
even 15 minutes of direct skin contact with their male5 T0 w8 X2 P0 p
partners.6 However, when a shirt covered the applica-
9 V( q1 ^; u9 L- Ftion site, this testosterone transfer was prevented.
+ D0 W* |! S# e+ w) KOur patient’s testosterone level was 60 ng/mL,
9 B# Q4 U# X1 ^. W$ Kwhich was clearly high. Some studies suggest that
8 N$ [ O2 E1 p6 _* Z# udermal conversion of testosterone to dihydrotestos-$ b$ D0 n; f/ W' X+ T
terone, which is a more potent metabolite, is more2 X B, g Z4 m$ L0 N
active in young children exposed to testosterone1 Z" }6 o$ Q8 ?1 X- r* O
exogenously7; however, we did not measure a dihy-
7 D1 L) O9 A" J$ ~( K% v0 A, ydrotestosterone level in our patient. In addition to
9 n1 B B, \) y6 nvirilization, exposure to exogenous testosterone in
8 l- y( O8 M# X/ k% i4 Echildren results in an increase in growth velocity and+ R- p+ o# x7 G
advanced bone age, as seen in our patient.. k: m; {- x' z# t) {0 o
The long-term effect of androgen exposure during3 X# f' ?1 k/ M: R x7 E
early childhood on pubertal development and final
4 _" [0 l0 B: {3 `: a+ Oadult height are not fully known and always remain
3 n6 O9 {8 [0 H+ xa concern. Children treated with short-term testos-
2 R" {! X9 F4 p+ ~terone injection or topical androgen may exhibit some6 m# \# Z9 I3 U5 [ B5 _. t1 `" _+ H
acceleration of the skeletal maturation; however, after
r# T5 w# R) r: V3 }+ Ccessation of treatment, the rate of bone maturation: h) A6 V: S, L& |0 z; h
decelerates and gradually returns to normal.8,9
, T2 v# G: |6 UThere are conflicting reports and controversy6 N) r; n3 [: u7 ^
over the effect of early androgen exposure on adult3 F, H$ Z( Z4 `3 [9 }
penile length.10,11 Some reports suggest subnormal0 D0 X! w! U w
adult penile length, apparently because of downreg-0 Z) f* r1 }$ w0 k: [+ c$ i
ulation of androgen receptor number.10,12 However,0 i) Y: U( l3 N) u( [/ c6 N; h
Sutherland et al13 did not find a correlation between
7 H: D$ T4 j$ W8 @; t6 T% tchildhood testosterone exposure and reduced adult
; N, r2 O$ _6 B8 T6 O5 @) M$ B$ Kpenile length in clinical studies.* V6 G1 d8 O' p2 o
Nonetheless, we do not believe our patient is) O- [2 D& A/ a5 R; p% a$ Y( ]: R, Z
going to experience any of the untoward effects from
+ K6 r- m: G( k/ Mtestosterone exposure as mentioned earlier because
7 w! w7 D6 A" M( U8 ~ ]2 @' }3 b: n: ythe exposure was not for a prolonged period of time.
U0 ?1 k9 i% P. ~, XAlthough the bone age was advanced at the time of+ ^4 b7 x& U+ s5 ~' c. P: P. B
diagnosis, the child had a normal growth velocity at
3 V1 T4 r. ^! i j* x8 E) ythe follow-up visit. It is hoped that his final adult
- L' Y2 K# ~* }; d9 b( r4 [1 T& r# wheight will not be affected.1 I1 f* D" U3 g. A! j
Although rarely reported, the widespread avail-9 ~9 c$ S0 T8 D* ?
ability of androgen products in our society may
& ?+ \7 U% G( ^, U lindeed cause more virilization in male or female
/ ^0 h1 t7 N. |children than one would realize. Exposure to andro-: v0 u& f- a+ h( I( K/ [ i
gen products must be considered and specific ques-. v1 `3 u: H$ O) A$ a
tioning about the use of a testosterone product or
* J) w n, E( P% i$ @/ i6 Hgel should be asked of the family members during
1 y& o) d% s8 S- w( D" E2 _& Cthe evaluation of any children who present with vir-
' s) n# c. Q/ V5 c; qilization or peripheral precocious puberty. The diag-
) ]8 U! h2 V* y" g" \0 V: xnosis can be established by just a few tests and by
+ e( T% s8 b0 W% f9 _; x% Iappropriate history. The inability to obtain such a
! N `5 r) |! h9 N4 b5 {, A! ?history, or failure to ask the specific questions, may; T' E' v, \; x' \
result in extensive, unnecessary, and expensive) X% ~( G1 E! q
investigation. The primary care physician should be
1 c$ w5 y+ f# [! h8 \% m; Vaware of this fact, because most of these children
0 y; U, x/ e4 L7 }- Q: c9 Y3 [, mmay initially present in their practice. The Physicians’2 h2 e' O* Q- d: }: Z% r/ X& H8 n
Desk Reference and package insert should also put a: C+ T/ Q8 y6 L
warning about the virilizing effect on a male or' E# M* _% \$ X" G
female child who might come in contact with some-
5 _3 F5 c& a2 T4 zone using any of these products.
/ \# x) N3 C' d7 Q7 q; W- n0 BReferences# a m3 z, Q. q& C1 H/ N% h
1. Styne DM. The testes: disorder of sexual differentiation$ o+ p3 J/ k9 \* m( b
and puberty in the male. In: Sperling MA, ed. Pediatric4 O! o' g% ~8 z% a% B4 @3 B5 i
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;9 r! ? |, `6 }: J
2002: 565-628.
) T3 j. `, C$ R3 ^" X2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious( X' y' o& r. y w
puberty in children with tumours of the suprasellar pineal; W' [8 w# j- i, o/ P" S
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. b2 L9 a$ T1 j* gTopical Testosterone Exposure / Bhowmick et al 543
9 d/ E0 `' p) N7 |1 T3 wareas: organic central precocious puberty. Acta Paediatr.
; ^9 ]+ i# Q- D/ G2001;90:751-756.0 q' o0 t9 v& ^+ e7 \2 ~: `+ V( {8 O
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
1 i& Y0 r; G3 s/ N3 Y! Z% pPediatric Endocrinology. 4th ed. New York, NY: Marcel6 ~5 r( P8 c$ k
Dekker Inc; 2003:211-238.
: p8 k/ X, X- K2 y, B4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
, e; |8 c9 \" z$ xdevelopment in a two-year-old boy induced by topical! V+ m+ }! ~$ W2 W9 L
exposure to testosterone. Pediatrics. 1999;104:e23.% h) y( G. h8 \6 |3 t- r4 |( N5 m
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
2 [. e7 [* L' a2 C. {( O5 E2 l5 lSkeletal Development of the Hand and Wrist. 2nd ed.
! w6 ?/ A6 \9 R9 M0 H( n/ L0 K( y/ OStanford, CA: Stanford University Press; 1959.
/ Y) |' [; {/ a1 Y, N4 [: V3 J6. Physicians’ Desk Reference. Androgel 1% testosterone,
: B8 G9 J2 D2 L* f7 {( X% QUnimed Pharmaceutical Inc. Montvale, NJ: Medical
) i" Y$ J S, X4 iEconomics Company, Inc; 2004:3239-3241.- i& Q3 U4 P1 Z Z
7. Klugo RC, Cerny JC. Response of micropenis to topical
- E, K* c( B2 wtestosterone and gonadotropin. J Urol. 1978;119:( ~+ M/ d+ c M7 N2 P0 z2 c% x
667-668.
/ [' p+ V% Y- {8. Guthrie RD, Smith DW, Graham CB. Testosterone
9 L8 t& D* d: V& ]- ?% S D9 ~* M+ W" _treatment for micropenis during early childhood. J Pediatr.
, r# x& n) S6 J# U2 c& s, y1973;83:247-252.
: N7 O9 {; U! C+ i4 f; k) H9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
+ Y( Z3 |0 |1 ?9 Y0 J Ftherapy for penile growth. Urol. 1975;6:708-710.
! H# F8 t" {) \& S# r0 S10. Husmann DA, Cain MP. Microphallus: eventual phallic
; ]2 I% s& |3 C \) m) d) gsize is dependent on the timing of androgen administra-3 I. j/ h# S2 ]! X; V$ W7 w6 F5 g
tion. J Urol. 1994;152:734-739.
) R- S; K/ ^+ z% a% Z% P6 |11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
! ?; R! R( n" Z' B( u! Cdoes early treatment with testosterone do more harm2 U+ X& @# S+ o
than good? J Urol. 1995;154:825-829.
( X# v6 q0 l. \$ V" r, P# M12. Takane KK, George FW, Wilson JD. Androgen receptor0 A8 v) D g# |$ y- Z" W; h
of rat penis is down-regulated by androgen. Am J Physiol.
7 {$ O- Y$ {! e8 D, v# z1990;258:E46-E50.2 o: S9 ~5 E, O9 H' I5 |
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
/ g8 [$ t# k/ x( @2 nof prepubertal androgen exposure on adult penile
) I& {2 {8 g- ]( Wlength. J Urol. 1996;156:783-787. |
|