- 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. Central2 \$ } V- Q. M3 X
precocious puberty (CPP), which is mediated, o' s6 ]) ]. n! s3 C' _/ p% s
through the hypothalamic pituitary gonadal axis, has9 P$ _- ~" x5 \4 e8 s+ m, Y9 x
a higher incidence of organic central nervous system
, r5 u. @: r+ v- r! F+ l4 h4 Rlesions in boys.1,2 Virilization in boys, as manifested
5 j# ` z4 a# y4 D8 v% W9 Yby enlargement of the penis, development of pubic3 i0 D1 e. @4 y6 e6 y' t+ h W3 S
hair, and facial acne without enlargement of testi-+ y7 o4 o" r/ t3 B5 s
cles, suggests peripheral or pseudopuberty.1-3 We! ?- ^" G- J/ X6 @: Z$ ?, I" f
report a 16-month-old boy who presented with the! k) w, X& k# K `
enlargement of the phallus and pubic hair develop-
/ d. A; ~5 b- K* I1 M- iment without testicular enlargement, which was due
, h- Q. f* f# r, v$ hto the unintentional exposure to androgen gel used by" x7 l; |8 ~8 b+ j& ]
the father. The family initially concealed this infor-
# f% W6 v6 K i; qmation, resulting in an extensive work-up for this
6 z' K& S8 z8 [, T7 A6 kchild. Given the widespread and easy availability of
& O9 T; \" F+ ~# i. ]testosterone gel and cream, we believe this is proba-7 \, d1 z; k: A D$ ]/ I& f, \
bly more common than the rare case report in the
4 H, u$ m# B2 T- Z9 z+ c) Lliterature.4
7 }. \, x# S7 X. N% VPatient Report
1 U" G# t1 D, [8 F, x; SA 16-month-old white child was referred to the
# M) V" h- X# }2 rendocrine clinic by his pediatrician with the concern; m: j7 _( b) U6 ~0 Q
of early sexual development. His mother noticed$ B* l) a8 i6 E2 ^
light colored pubic hair development when he was8 m, Z7 u: r& }4 j$ r4 K' X! p
From the 1Division of Pediatric Endocrinology, 2University of
* a! P% y0 q4 Z2 G) `3 @0 uSouth Alabama Medical Center, Mobile, Alabama.
' K+ p% H" P: x0 Q2 c' ]9 N4 {Address correspondence to: Samar K. Bhowmick, MD, FACE,
5 W3 k4 O/ N' Z, rProfessor of Pediatrics, University of South Alabama, College of
6 r8 l' _! y! b$ a/ I2 f H9 SMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
. H, ` z, f' J# u) r3 B1 fe-mail: [email protected].
6 N7 s. S( z4 yabout 6 to 7 months old, which progressively became
% a9 _. v7 i3 w8 K3 H ldarker. She was also concerned about the enlarge-/ S& g+ X9 A- x" _4 j- `# Z, T
ment of his penis and frequent erections. The child" n1 |2 y9 ~. ?* u1 U
was the product of a full-term normal delivery, with
- ]! Z$ m* Z- l* X1 ja birth weight of 7 lb 14 oz, and birth length of/ ^* p$ _; o D& p6 w. Y4 Z
20 inches. He was breast-fed throughout the first year
8 U: t. T$ ~5 _& ?0 b5 q0 Q6 t3 c pof life and was still receiving breast milk along with, s) c9 _3 q" Y! H) G! I9 g
solid food. He had no hospitalizations or surgery,
* }: c/ ? g/ |and his psychosocial and psychomotor development, d4 E; q0 q$ `5 M
was age appropriate.
9 _* F3 h1 I% p5 x/ sThe family history was remarkable for the father,
, ]8 u8 r7 o2 S& swho was diagnosed with hypothyroidism at age 16,6 u* i9 \( a( Z( j1 j7 r
which was treated with thyroxine. The father’s, S- k# V0 P6 @
height was 6 feet, and he went through a somewhat
7 K5 w4 X+ T& b4 vearly puberty and had stopped growing by age 14.
1 V# S+ V z" h1 z5 |The father denied taking any other medication. The
5 c% |2 W/ [ m( }child’s mother was in good health. Her menarche
4 W4 i0 U) N+ I: R/ m" }was at 11 years of age, and her height was at 5 feet
) Y+ m# {& j. R' ]8 D( ^: R, o7 X5 inches. There was no other family history of pre-: _. P$ E. j: `! [2 ^% C
cocious sexual development in the first-degree rela-
9 |. s" L) D# V( ttives. There were no siblings.
+ X l' x) [( W; E# \4 ~Physical Examination2 o& w( l9 f, O& X& Y6 `* ~" U- X/ H
The physical examination revealed a very active,2 U5 ?+ c% L, w9 _5 }
playful, and healthy boy. The vital signs documented+ N1 |- v" c2 y! d3 n$ {
a blood pressure of 85/50 mm Hg, his length was4 {, v% _9 z5 A- k* y
90 cm (>97th percentile), and his weight was 14.4 kg/ H+ G: @% |8 i$ v9 F: z
(also >97th percentile). The observed yearly growth! b% ^" z$ U% N6 G( C9 r' ^* u* n
velocity was 30 cm (12 inches). The examination of1 E7 U! h) s8 E% s$ e& c0 J* _
the neck revealed no thyroid enlargement.7 ]0 [ Y |+ `" h2 }
The genitourinary examination was remarkable for. p: S+ w. W/ ~0 ] k' k4 u
enlargement of the penis, with a stretched length of; R4 E, m7 K5 l4 N" g
8 cm and a width of 2 cm. The glans penis was very well! q" f) d5 r: Q ^6 f, j* |5 p
developed. The pubic hair was Tanner II, mostly around4 ]/ E4 p3 e0 ?, D7 l! s" o: h
540
' B# r2 d1 [; _) g( L) Hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ l1 x+ d" }# m0 X
the base of the phallus and was dark and curled. The
1 d* M- b& z2 H1 g0 Rtesticular volume was prepubertal at 2 mL each.' `( M) Y0 @* y4 z; Q6 _# z! a
The skin was moist and smooth and somewhat
! d |8 v7 e2 g+ qoily. No axillary hair was noted. There were no5 A- {& |( N a4 T2 S
abnormal skin pigmentations or café-au-lait spots.6 k( P) g& [* I$ B7 x
Neurologic evaluation showed deep tendon reflex 2+# `4 a2 }: J' p$ q+ e* w
bilateral and symmetrical. There was no suggestion
0 ]6 b. A# w0 [% g" [of papilledema.
0 \( t; h4 q, V9 RLaboratory Evaluation
. S4 {3 U- a' W, jThe bone age was consistent with 28 months by
3 e; [( a3 n5 \5 u# T' wusing the standard of Greulich and Pyle at a chrono-/ f- j+ T1 [" P1 K
logic age of 16 months (advanced).5 Chromosomal
( Y; ~/ |9 J# V- d% Ukaryotype was 46XY. The thyroid function test
7 q3 p" `7 V, ~showed a free T4 of 1.69 ng/dL, and thyroid stimu-1 G% h$ N" J( a
lating hormone level was 1.3 µIU/mL (both normal). a, ~: d9 o0 @
The concentrations of serum electrolytes, blood+ k% p3 k L I
urea nitrogen, creatinine, and calcium all were
. t9 o. ?& y: N- R) Iwithin normal range for his age. The concentration: [7 x: ]8 E# ~7 h* _* Y+ N) Z/ }3 g
of serum 17-hydroxyprogesterone was 16 ng/dL
8 h: {/ F& O5 ^! g5 h& {4 p(normal, 3 to 90 ng/dL), androstenedione was 20
! S/ X/ ?: d1 L* l7 g2 d1 d* Cng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-% N! O ^3 D/ v- E
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
8 o* G0 w% g4 e* ^/ I% z$ Pdesoxycorticosterone was 4.3 ng/dL (normal, 7 to" G/ s! N8 @) x% d1 S1 N$ F
49ng/dL), 11-desoxycortisol (specific compound S)
" O8 b2 d. h" m) Z# V6 Qwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-5 l2 B$ ]( c3 X! I
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
1 C1 a7 p. I! l! c4 v# xtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
; _* l, K; h( d0 R2 ^9 p' p- |5 Mand β-human chorionic gonadotropin was less than
, d( f- m* c1 z) q5 mIU/mL (normal <5 mIU/mL). Serum follicular
/ F* _( R, u5 T5 M5 h3 z, ?9 cstimulating hormone and leuteinizing hormone
4 \6 s7 C1 C' C* \* I. N6 K8 e* econcentrations were less than 0.05 mIU/mL
! y P5 ]5 j; |4 q2 E* L3 E(prepubertal).
4 W0 ?. X7 c G" I" MThe parents were notified about the laboratory
- ~: U& ]4 Q$ b" d0 O& k: \results and were informed that all of the tests were- a. l7 ^5 e3 D+ s$ G
normal except the testosterone level was high. The5 a1 k+ v! H, \7 {
follow-up visit was arranged within a few weeks to9 m2 |& @5 @ ^" M" W
obtain testicular and abdominal sonograms; how-
& h2 B8 ~1 M& j+ xever, the family did not return for 4 months.
( J8 B1 U" W6 H( c& fPhysical examination at this time revealed that the0 L7 W5 F6 w( Z7 F
child had grown 2.5 cm in 4 months and had gained
; C2 W V/ y$ |2 kg of weight. Physical examination remained
. O1 U: M# e, G- Punchanged. Surprisingly, the pubic hair almost com-
5 h( r; p# e4 N' i4 X; fpletely disappeared except for a few vellous hairs at
3 _! T' |& _$ {the base of the phallus. Testicular volume was still 2
' U: A2 }5 _! L! |! X' RmL, and the size of the penis remained unchanged.
% [* Q; c4 i/ @3 W. pThe mother also said that the boy was no longer hav-: U8 x# m/ `5 B
ing frequent erections.- }! z e& M3 X6 ?! U8 t
Both parents were again questioned about use of
! X" F1 `- D/ V. Eany ointment/creams that they may have applied to0 c8 ?" U9 ~" c( E6 C' |7 T
the child’s skin. This time the father admitted the
3 c- ]. l2 O3 i- S" m/ o' hTopical Testosterone Exposure / Bhowmick et al 541
; E$ V1 `2 ~: ]$ W1 `% ]6 P/ guse of testosterone gel twice daily that he was apply-
: v! N* q6 v9 y5 D0 xing over his own shoulders, chest, and back area for6 Q1 b$ B; K8 O+ v: ?& L4 \
a year. The father also revealed he was embarrassed
7 W4 ^. W" z7 E* D3 S* [to disclose that he was using a testosterone gel pre-+ G1 u* E5 e; n* v
scribed by his family physician for decreased libido" \. `* P4 ~6 B( ?$ K' w
secondary to depression.' F x' Q, b% A. d2 T/ x9 T
The child slept in the same bed with parents.( ~6 c3 i! ]% m" e0 d& W
The father would hug the baby and hold him on his1 I; |. C& W# m% y6 C) y
chest for a considerable period of time, causing sig-
2 t t" r A3 dnificant bare skin contact between baby and father.
* E3 R4 K% t- ^1 u2 t' EThe father also admitted that after the phone call,
# B8 G8 X4 v% S5 B6 j3 t. W0 {8 K8 Awhen he learned the testosterone level in the baby5 ?# {3 E. I7 @+ o! Y4 k9 k4 P
was high, he then read the product information* }" L& K+ B" ]7 H% J. E' l3 v
packet and concluded that it was most likely the rea-4 \# c/ J+ v$ M+ P3 ~4 M' _
son for the child’s virilization. At that time, they
& W/ k6 |, q0 s3 bdecided to put the baby in a separate bed, and the ?) P% ~$ r- b0 n4 T
father was not hugging him with bare skin and had
/ j5 g1 a3 s$ u! h3 m1 hbeen using protective clothing. A repeat testosterone6 f a% p# P+ u8 Z* h% O7 t
test was ordered, but the family did not go to the
% U+ _8 h9 Q. Q3 ?: n' blaboratory to obtain the test.5 n& U0 j% ~* y" F* R, L$ W
Discussion2 | O/ \. ~, k9 }. W% T" v2 k
Precocious puberty in boys is defined as secondary" x* d' s7 P1 s" n4 \" i. g0 m
sexual development before 9 years of age.1,4
3 I8 p7 L0 z+ h' t: BPrecocious puberty is termed as central (true) when
. c* _! a6 t& D& f; T) Eit is caused by the premature activation of hypo-
$ J+ G6 K) C Lthalamic pituitary gonadal axis. CPP is more com-
( I" H. z2 M8 n; Z3 b. Omon in girls than in boys.1,3 Most boys with CPP
/ [% r5 x2 e' v1 F3 hmay have a central nervous system lesion that is& V8 X; B' e G" `( _
responsible for the early activation of the hypothal-3 t3 y: y4 y+ p5 {
amic pituitary gonadal axis.1-3 Thus, greater empha-3 A/ ?, [4 |6 Z! H
sis has been given to neuroradiologic imaging in
8 V+ }: s) n0 U, k1 E# T( Fboys with precocious puberty. In addition to viril-
" O" l" b( B" e# Nization, the clinical hallmark of CPP is the symmet-
7 Q0 S2 {/ v& G- `- D1 T7 D6 ~2 Y; Nrical testicular growth secondary to stimulation by/ m' B5 c7 ?: E
gonadotropins.1,3* v2 c0 {! v: r, I _; [3 w0 p% y9 A
Gonadotropin-independent peripheral preco-
! A E! |! D; O$ H f5 Ucious puberty in boys also results from inappropriate* E1 ~, ?# f# y: r) ?
androgenic stimulation from either endogenous or
) s/ H! {0 W J; i/ N M0 e- O( J. Sexogenous sources, nonpituitary gonadotropin stim-
/ K5 F7 m! ~6 d' o5 Q* K! wulation, and rare activating mutations.3 Virilizing
$ y0 a" S6 U& N$ t0 i! x. Pcongenital adrenal hyperplasia producing excessive8 R' ]/ \" C5 q/ Q
adrenal androgens is a common cause of precocious
4 u# R& c" y; K! J( jpuberty in boys.3,4
: q( j6 A. Z3 h4 X6 A! x5 _# R, }The most common form of congenital adrenal
& |3 }% ]' u# O) ]0 l/ s0 U& B W1 e* rhyperplasia is the 21-hydroxylase enzyme deficiency.
/ V2 r+ Z, [' P! t& ~The 11-β hydroxylase deficiency may also result in: E6 C+ }3 r8 V6 j
excessive adrenal androgen production, and rarely,/ z% ?* X: c* J
an adrenal tumor may also cause adrenal androgen9 ^3 e0 }, O1 E
excess.1,3
, t" ?% r* t+ \, ~# k5 W& ~$ B, fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 M& z6 s7 r+ A$ S0 }, i! L# U
542 Clinical Pediatrics / Vol. 46, No. 6, July 20077 x% Y5 _/ a8 e
A unique entity of male-limited gonadotropin-( _. k% l2 X( Y
independent precocious puberty, which is also known! F0 J; ?1 x- \ X
as testotoxicosis, may cause precocious puberty at a2 v7 ~8 L# N f5 i: G
very young age. The physical findings in these boys
; ?6 Z$ _- y3 u) n" b( |. x: ~& nwith this disorder are full pubertal development,1 T! B9 u3 Z! B R# r
including bilateral testicular growth, similar to boys8 f. z: Z5 a* B8 c7 `
with CPP. The gonadotropin levels in this disorder
( }+ F' g, q% V* aare suppressed to prepubertal levels and do not show/ p, x8 V$ s4 P+ ]# v/ a
pubertal response of gonadotropin after gonadotropin-
/ O: r* K: o5 W& |releasing hormone stimulation. This is a sex-linked1 Z3 a4 u0 e; j2 I J* S. [% Q
autosomal dominant disorder that affects only$ {5 {8 R. ~5 g; ~
males; therefore, other male members of the family
Y ~9 P g+ @+ o- O# y7 qmay have similar precocious puberty.3, P0 I# \. w, p* @0 |
In our patient, physical examination was incon-
, H- }( D0 N0 l+ a$ N. osistent with true precocious puberty since his testi-( ]. a9 E$ z, t' d7 ~
cles were prepubertal in size. However, testotoxicosis- P* m- _1 M0 c
was in the differential diagnosis because his father$ H/ M" k5 O/ H1 @& W/ o' o
started puberty somewhat early, and occasionally,/ G3 @( e7 E- W# }; V' Q' S) I+ }
testicular enlargement is not that evident in the
) u4 h. `4 T! X( L/ C; t6 Y1 [beginning of this process.1 In the absence of a neg-9 M o" b. u, a& {2 S
ative initial history of androgen exposure, our
. \ f& x' N y X+ Zbiggest concern was virilizing adrenal hyperplasia,# w- n4 W- j v9 v) C
either 21-hydroxylase deficiency or 11-β hydroxylase
4 x& Y8 \9 b( E. O4 b# m6 K7 vdeficiency. Those diagnoses were excluded by find-
. L" q& Y- E6 p3 R& G! Iing the normal level of adrenal steroids.
4 x- }4 a$ A2 L8 l L8 oThe diagnosis of exogenous androgens was strongly
. h, f/ T# X4 B: h% Psuspected in a follow-up visit after 4 months because
# H1 K9 y) B' i' [* j" ?2 l( ~the physical examination revealed the complete disap-
* e4 s# j: d0 n. _0 f2 {pearance of pubic hair, normal growth velocity, and/ N2 h3 ^+ [4 o0 g1 {
decreased erections. The father admitted using a testos-
4 ?! ^$ |! Y; rterone gel, which he concealed at first visit. He was) t& J- _7 _/ k& V# @2 B1 T
using it rather frequently, twice a day. The Physicians’
9 P5 o# Z! P1 V) fDesk Reference, or package insert of this product, gel or
+ g9 ^& S6 Q4 V5 A/ Q6 b7 bcream, cautions about dermal testosterone transfer to9 e& F$ W. z( f/ q' v' K5 z( O/ |
unprotected females through direct skin exposure.
1 O. w* e! F, [* LSerum testosterone level was found to be 2 times the
. Z) v! K( i* @2 |) w( obaseline value in those females who were exposed to' c4 U+ g/ B; z! s. h. k) h
even 15 minutes of direct skin contact with their male# t6 y) W, g+ s
partners.6 However, when a shirt covered the applica-% [3 y6 }; D5 [" U' P% K0 m
tion site, this testosterone transfer was prevented.
; t( A {2 O( l' A. q1 u5 q4 _Our patient’s testosterone level was 60 ng/mL,
o2 C& t' F" J) O7 fwhich was clearly high. Some studies suggest that& i z3 E8 m4 \1 W/ b0 C
dermal conversion of testosterone to dihydrotestos-" L, e8 Z# O) n. X. }4 K
terone, which is a more potent metabolite, is more
/ A$ U, n0 B- }$ ]( x! G& ~* n, Factive in young children exposed to testosterone
% t7 p# }; n9 r$ W3 B: Zexogenously7; however, we did not measure a dihy-+ B& v Z1 y. Q4 w2 d$ N) `
drotestosterone level in our patient. In addition to
3 d, O" s# x; d3 b+ w$ M2 r1 ]virilization, exposure to exogenous testosterone in2 w) T% y* N' @
children results in an increase in growth velocity and+ G- W9 l* h7 N" W% J
advanced bone age, as seen in our patient.
( k6 Q0 R& b2 ]- p' E0 fThe long-term effect of androgen exposure during
) z9 U9 |1 v# A! k1 [early childhood on pubertal development and final; n5 a4 C) Q" `" t A) s" o! x
adult height are not fully known and always remain9 X, r1 K6 n) @8 \2 K. ?
a concern. Children treated with short-term testos- Z8 _. B; u) Q8 c) Y
terone injection or topical androgen may exhibit some
# {; T+ L0 z Gacceleration of the skeletal maturation; however, after
/ ]) W- l* G. \ F3 scessation of treatment, the rate of bone maturation. T8 V. K+ ?" X* |6 l! L
decelerates and gradually returns to normal.8,9. U' A* f2 G& M+ [$ c" k7 N: Z
There are conflicting reports and controversy2 d* p+ u2 }$ Y
over the effect of early androgen exposure on adult
) c2 P1 N4 X* E9 z( Kpenile length.10,11 Some reports suggest subnormal! a0 J% T* x0 }7 M$ p
adult penile length, apparently because of downreg-
) k# n. R$ B' S# A! q, d0 ~ulation of androgen receptor number.10,12 However, L: _8 o& i4 T
Sutherland et al13 did not find a correlation between& c4 ]9 ]3 R2 A
childhood testosterone exposure and reduced adult, w7 z/ l9 X8 h7 W& D. S+ e
penile length in clinical studies.
8 w( \1 x( _0 R* b0 ]- h* I+ q' |( p5 KNonetheless, we do not believe our patient is% q, P; q, ]7 u N" e
going to experience any of the untoward effects from
# Y8 b' M9 L" I, ptestosterone exposure as mentioned earlier because
) a7 |# L1 \. G& o. s0 |the exposure was not for a prolonged period of time.
6 m% B# V% H$ ?Although the bone age was advanced at the time of* \2 o2 X) `) R7 _0 P3 W- F
diagnosis, the child had a normal growth velocity at* n3 n4 t1 Q" o9 u1 b
the follow-up visit. It is hoped that his final adult9 @; n$ T W" C$ g9 n* A& u
height will not be affected.
" J, H. r, R' D4 E* vAlthough rarely reported, the widespread avail-
! X3 r! G6 k" E; I( s# a8 U6 f+ \ability of androgen products in our society may
& @: U# w( P7 W5 V1 Q* cindeed cause more virilization in male or female3 {9 `7 N0 A4 }2 `
children than one would realize. Exposure to andro-7 ]. x; y* i1 u `5 E
gen products must be considered and specific ques-9 q. e- |" ^! B# S0 I
tioning about the use of a testosterone product or
; ^* |3 T. Z y( M% _( agel should be asked of the family members during4 A* p7 O7 s6 U' y. ~1 w5 X
the evaluation of any children who present with vir-
! A$ e9 Q' j% U' Oilization or peripheral precocious puberty. The diag-8 n4 H" N6 f! r
nosis can be established by just a few tests and by
. A1 y+ F+ n& L/ F J! B$ bappropriate history. The inability to obtain such a
) Q2 J M- g$ P* Q/ S: K5 phistory, or failure to ask the specific questions, may
0 A. e8 b* n: U4 i4 j- Tresult in extensive, unnecessary, and expensive% S% Z& L( b5 u; m
investigation. The primary care physician should be; L7 S* j$ O1 Y" t1 x* f% H Q
aware of this fact, because most of these children, z& I+ t1 G' O$ ]0 y
may initially present in their practice. The Physicians’, C N {" l4 b
Desk Reference and package insert should also put a
5 C) i2 d: g) T4 t& x; ]warning about the virilizing effect on a male or
: C- ]% K; R2 E" |female child who might come in contact with some-
' X' l8 i, B0 e# J1 \ R# vone using any of these products.
! S5 i* b' a. b; M" J& C- xReferences
" ]; l: S' {! W& C7 H1. Styne DM. The testes: disorder of sexual differentiation" x1 g y" y1 e/ I( [
and puberty in the male. In: Sperling MA, ed. Pediatric
( P1 _) r* H; p. D- PEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;5 M; d7 G% K' O: v2 h- I( i& g
2002: 565-628.
+ p- D+ o/ ?3 Q$ o& s+ b3 j# o! P+ e2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
0 [: [) t o7 P) rpuberty in children with tumours of the suprasellar pineal
, |# |. O! h! i+ O' Y4 xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" Q' S# A! U" i; S& c- G$ N
Topical Testosterone Exposure / Bhowmick et al 543+ B8 W" G5 I. h- W6 s8 y
areas: organic central precocious puberty. Acta Paediatr." ^9 L, y7 j. q2 Y/ U
2001;90:751-756.$ X6 C" W8 N' j1 {+ f3 O
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.3 w, Y* a8 n% `2 x; X. T
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
: z. z7 O6 m. H! J2 ^3 p4 O# LDekker Inc; 2003:211-238.0 [0 @' D; s& ]
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual9 r9 o) `' P# S5 L' \
development in a two-year-old boy induced by topical; f) X- j j% C# j% s. C% }) w
exposure to testosterone. Pediatrics. 1999;104:e23.
. U- T8 c( @" h( G+ N5. Greulich WW, Pyle SI, eds. Radiographic Atlas of' m2 s' X I0 ?* V
Skeletal Development of the Hand and Wrist. 2nd ed.
6 x ^+ n5 F Z5 cStanford, CA: Stanford University Press; 1959.- r, \1 f" J& |; \1 O! c
6. Physicians’ Desk Reference. Androgel 1% testosterone,
( L* g+ A. E/ |6 ~- G" iUnimed Pharmaceutical Inc. Montvale, NJ: Medical
x# [/ h+ H: AEconomics Company, Inc; 2004:3239-3241., u. w9 C q3 \9 H5 @
7. Klugo RC, Cerny JC. Response of micropenis to topical
* S9 N6 |" h$ k/ Xtestosterone and gonadotropin. J Urol. 1978;119:
# l0 r' _3 U6 |2 P& S+ t$ L667-668.. t. l2 G4 W U5 R
8. Guthrie RD, Smith DW, Graham CB. Testosterone) U$ u# g( }/ a" b3 U
treatment for micropenis during early childhood. J Pediatr., l0 {2 l* Y" J6 h3 \1 Z' E
1973;83:247-252.
1 R8 X; `! f# q9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone6 }6 U2 i7 v0 h6 v
therapy for penile growth. Urol. 1975;6:708-710.0 Q# C, H0 X4 z" R6 d- S2 q
10. Husmann DA, Cain MP. Microphallus: eventual phallic
1 C7 d+ S/ L- l, U4 v3 ]size is dependent on the timing of androgen administra-
E4 A$ X. w5 L+ w3 otion. J Urol. 1994;152:734-739.9 v' m" e5 i& f0 ]7 j
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:( A! e& r' G0 z
does early treatment with testosterone do more harm$ G5 Y" K. Z: T* f0 r0 {
than good? J Urol. 1995;154:825-829./ [7 T3 i% o$ H6 V# H: R
12. Takane KK, George FW, Wilson JD. Androgen receptor
0 } s# w" Y; ?of rat penis is down-regulated by androgen. Am J Physiol.
8 j" p* s2 w/ g% T7 f1990;258:E46-E50.
6 S) u U6 g7 s7 C13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
- H. w, x/ W6 N+ g: nof prepubertal androgen exposure on adult penile: ?# [" C( U0 M Y9 S& s% ?
length. J Urol. 1996;156:783-787. |
|