- 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
8 j- D3 X5 f. Q( x! Kprecocious puberty (CPP), which is mediated
$ `5 y* `8 [' ^% y& ~$ c# K* l' Z C+ nthrough the hypothalamic pituitary gonadal axis, has6 k. X8 u1 p2 g: E: x
a higher incidence of organic central nervous system+ a' I+ P1 H& d
lesions in boys.1,2 Virilization in boys, as manifested
0 x) D" G3 T! wby enlargement of the penis, development of pubic u! J2 Q% Y* u7 e; u
hair, and facial acne without enlargement of testi-
2 p9 J9 S2 i/ B- ecles, suggests peripheral or pseudopuberty.1-3 We
$ ^( R7 _2 @* l% L0 Ireport a 16-month-old boy who presented with the3 H) H* n8 c% C3 ?- }5 k
enlargement of the phallus and pubic hair develop-
e# V; w+ [; i6 K* |. {ment without testicular enlargement, which was due* L/ K2 c3 c* ?- P. h
to the unintentional exposure to androgen gel used by
" @! ?$ ]0 F& O2 z& B8 F$ d" N4 vthe father. The family initially concealed this infor-
; j) O: f0 z4 k: n( lmation, resulting in an extensive work-up for this" A& r, {( h; |8 [$ S+ ?% N9 m
child. Given the widespread and easy availability of! H v# N! O/ h
testosterone gel and cream, we believe this is proba-
o0 O6 f. W/ k: p/ @- dbly more common than the rare case report in the+ E( s& W8 C4 ]2 t$ `
literature.4
1 V3 R: |/ l) zPatient Report
) P2 j( m7 t" f/ C: nA 16-month-old white child was referred to the
2 u H$ l7 M2 W7 d9 `endocrine clinic by his pediatrician with the concern4 x- K5 `/ d9 m! P
of early sexual development. His mother noticed
5 j* X8 r# p/ s3 Zlight colored pubic hair development when he was$ X0 y- Z2 v$ Q, _) @
From the 1Division of Pediatric Endocrinology, 2University of
1 w- y- X2 I6 H! B8 JSouth Alabama Medical Center, Mobile, Alabama.
6 S; [ i" L' ]0 p$ n( L" `Address correspondence to: Samar K. Bhowmick, MD, FACE,9 ]& P7 t/ c6 v0 u7 c) l4 |
Professor of Pediatrics, University of South Alabama, College of
/ q" L, D9 C) mMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;% h0 [5 J5 ]9 W$ f& q6 ~
e-mail: [email protected].
' L9 ^/ y3 E7 Aabout 6 to 7 months old, which progressively became6 h1 d: `" }2 y$ n$ u
darker. She was also concerned about the enlarge-& ~& {% C5 Z' D
ment of his penis and frequent erections. The child+ x& L/ i& p! X; n3 v! r
was the product of a full-term normal delivery, with; ^# N# e# J: U& m
a birth weight of 7 lb 14 oz, and birth length of
( S1 V* _1 l8 g' z) _7 Y20 inches. He was breast-fed throughout the first year% I/ z0 ?3 h5 ~+ H
of life and was still receiving breast milk along with
" [2 N7 ~1 ~7 T2 k# vsolid food. He had no hospitalizations or surgery,
" e; N/ G$ r4 sand his psychosocial and psychomotor development! S: r) t2 F* K- V# X' N S8 y4 r7 t
was age appropriate.
- X+ ?0 U' K4 ~& \The family history was remarkable for the father,
7 c* M5 A% `5 e# I. T. S( dwho was diagnosed with hypothyroidism at age 16,! N; i: ^# X7 X& x9 A* q
which was treated with thyroxine. The father’s1 z8 X% X) G: h, f7 K
height was 6 feet, and he went through a somewhat/ L% a- |7 b% E# @7 K
early puberty and had stopped growing by age 14.. b$ e. ?7 I, R
The father denied taking any other medication. The
$ o& @9 ] A; \6 k: Y! Zchild’s mother was in good health. Her menarche
+ H4 h. X& \+ {, fwas at 11 years of age, and her height was at 5 feet$ ?4 P$ y+ F" {2 Y, e
5 inches. There was no other family history of pre-
4 Q- n u- _; ^; u1 ecocious sexual development in the first-degree rela-
$ e/ f7 B0 T. r" v% Stives. There were no siblings.' W$ x! @- O: w& ^, D
Physical Examination$ K* ^7 X! p3 f
The physical examination revealed a very active,2 \. P! O& K5 v) ]: T
playful, and healthy boy. The vital signs documented
1 q8 Q8 a4 J, d9 f. k+ pa blood pressure of 85/50 mm Hg, his length was. t; K: H3 \* m/ S* j
90 cm (>97th percentile), and his weight was 14.4 kg
1 C3 g4 q# t0 u- W! _$ W) t(also >97th percentile). The observed yearly growth
* v" N; p! A: Pvelocity was 30 cm (12 inches). The examination of
1 S7 G. P" o: p, I- f0 _the neck revealed no thyroid enlargement.
+ l! h& M2 L. _8 `0 iThe genitourinary examination was remarkable for- A1 h s& s6 s! n
enlargement of the penis, with a stretched length of. o6 N- i0 n7 C, Z) v' f
8 cm and a width of 2 cm. The glans penis was very well
9 X7 T/ z3 e7 l; e$ P. M ^$ ydeveloped. The pubic hair was Tanner II, mostly around% K+ Q9 x' d+ n( l. d- P$ w5 _
540
( h1 Q+ l# c7 `4 V& c. C) o+ w+ Vat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
9 @, A, k l. ~- O4 c1 W. tthe base of the phallus and was dark and curled. The
2 _+ z$ g' {( G* ztesticular volume was prepubertal at 2 mL each.
+ |! s/ @& v- K1 U2 uThe skin was moist and smooth and somewhat4 i' h5 U/ \8 e) g ]6 Z4 J
oily. No axillary hair was noted. There were no5 y8 _' ?6 H2 y$ Q
abnormal skin pigmentations or café-au-lait spots.) [: y& g& N3 z9 |' d. F
Neurologic evaluation showed deep tendon reflex 2+, \4 n: v$ m5 t) D7 J
bilateral and symmetrical. There was no suggestion* A; k* z8 J% X: }
of papilledema.
( S4 j+ }8 G9 l1 Q& aLaboratory Evaluation
H1 G* B. ?5 BThe bone age was consistent with 28 months by& r: v, t+ _- u7 c% v
using the standard of Greulich and Pyle at a chrono-
& l! |( N b, M' h/ slogic age of 16 months (advanced).5 Chromosomal, T F7 o9 D( J1 @, K7 h& P- f
karyotype was 46XY. The thyroid function test0 v0 t; [, L# V& p' T, ]
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
e9 v+ F( ^ S7 ^5 [lating hormone level was 1.3 µIU/mL (both normal).
/ k/ P' s) A, U: f1 ^; r) n2 yThe concentrations of serum electrolytes, blood
: k' s8 ^& d$ S3 z: aurea nitrogen, creatinine, and calcium all were7 v/ ~3 A$ p- `
within normal range for his age. The concentration9 A& }- Q. T% L
of serum 17-hydroxyprogesterone was 16 ng/dL
0 P- }1 A" S+ o9 ?(normal, 3 to 90 ng/dL), androstenedione was 204 C- s2 I% s3 x+ I8 U$ J* i
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
7 l% _2 d1 J/ y) Q, c* K3 T* \5 uterone was 38 ng/dL (normal, 50 to 760 ng/dL),
9 d; }4 K( L0 ]desoxycorticosterone was 4.3 ng/dL (normal, 7 to) B1 K9 @- r9 Y% r4 @5 o. r/ z
49ng/dL), 11-desoxycortisol (specific compound S)
. u7 D |1 G9 f& Qwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
" |2 O; b) G8 Xtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& ?* T4 U, _4 n4 g9 K
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
+ n6 n3 F% F7 R* J( iand β-human chorionic gonadotropin was less than
: ]- ?$ i! X! O% M- i7 s$ H5 mIU/mL (normal <5 mIU/mL). Serum follicular# o6 R- a) h5 g: G7 v E
stimulating hormone and leuteinizing hormone
1 S: B& n* K) w" ]* Econcentrations were less than 0.05 mIU/mL y( P: d" J) c3 O7 e
(prepubertal).% U7 ^' l8 _! E1 c' w( I' z
The parents were notified about the laboratory& h1 w8 Q. \+ j6 j
results and were informed that all of the tests were
6 f4 }; ]" O: L# n3 anormal except the testosterone level was high. The$ W" h! D, a8 T% O! d% x0 J! \" J! c# W
follow-up visit was arranged within a few weeks to6 d3 S$ M6 B( x) c2 q
obtain testicular and abdominal sonograms; how-* z! q& A" E- g" j" A: n
ever, the family did not return for 4 months.
# Z& ]0 o7 z" x" ]Physical examination at this time revealed that the1 X V* t2 e' m- O$ U
child had grown 2.5 cm in 4 months and had gained
( [2 V8 B- F5 c* y; W2 kg of weight. Physical examination remained
* O! L% @6 d5 D' R1 tunchanged. Surprisingly, the pubic hair almost com-' |0 p* f2 C& e5 z% s7 ?
pletely disappeared except for a few vellous hairs at
; u4 X, D# y# b9 ?! pthe base of the phallus. Testicular volume was still 2
1 Q& R+ B- ^- \# p+ imL, and the size of the penis remained unchanged.
' L$ Z2 Q6 f; M8 dThe mother also said that the boy was no longer hav-
& y" [& {: v. b9 e% t2 A, p& c8 D+ Ping frequent erections.
: U! ]( L6 U/ lBoth parents were again questioned about use of% [; D* t8 J7 [0 }( d. K
any ointment/creams that they may have applied to
: |" K6 g% R7 o2 Sthe child’s skin. This time the father admitted the
; N% F' L9 c7 k2 b+ g R7 UTopical Testosterone Exposure / Bhowmick et al 541
. y( h2 z( w1 x. buse of testosterone gel twice daily that he was apply-- J- o7 g! J T/ g- X" i0 B
ing over his own shoulders, chest, and back area for
( x! i4 _" }' X9 U" v0 O6 a) x- na year. The father also revealed he was embarrassed
4 G( e9 u* q- X. b, k! Z" sto disclose that he was using a testosterone gel pre-: \- G. f0 o1 F( o. W3 _5 ~8 J
scribed by his family physician for decreased libido; k7 Z& m5 b7 e7 n g: }
secondary to depression.
$ B* U& E' W4 B. I- a* |; RThe child slept in the same bed with parents.8 {: H* x7 c7 R+ ?
The father would hug the baby and hold him on his
# |/ Z- U0 v8 O3 B# k0 Mchest for a considerable period of time, causing sig-% {3 S8 }- X. ?8 L) o
nificant bare skin contact between baby and father.
0 P. Y) _0 C- i: H* RThe father also admitted that after the phone call,
! ]" _# i& [: O* n4 c; g+ Pwhen he learned the testosterone level in the baby: n5 m% r7 [* N1 h- C, }
was high, he then read the product information9 I' ?2 }* ^3 {; Y# f9 B
packet and concluded that it was most likely the rea-
3 j: g! f4 n/ L/ _ B: J2 Bson for the child’s virilization. At that time, they
8 f; i9 s8 n- ?decided to put the baby in a separate bed, and the- N9 e# L0 ?" I! z
father was not hugging him with bare skin and had6 z: J' P( B, P
been using protective clothing. A repeat testosterone
+ A8 u ] M* O1 t T+ E% [test was ordered, but the family did not go to the
1 Q0 t, m. v+ w6 l/ o$ A0 Olaboratory to obtain the test.
/ o3 o: ^) J' p! W8 ]' lDiscussion" y% s/ ^1 A) R6 k
Precocious puberty in boys is defined as secondary
9 V# X" Q9 ~' Dsexual development before 9 years of age.1,49 y4 E M8 J+ Y; t5 o% E: x5 D
Precocious puberty is termed as central (true) when
. G1 p( G) N8 V- Y. ]it is caused by the premature activation of hypo-+ V* c/ o7 f# K9 O+ ?5 }
thalamic pituitary gonadal axis. CPP is more com-
- f& j' ?. p% ^9 v' o! wmon in girls than in boys.1,3 Most boys with CPP
% Q0 C$ ~: b: Q2 smay have a central nervous system lesion that is1 l$ J! {+ E9 ]+ R* D- r
responsible for the early activation of the hypothal-" Z! N9 o, T5 Y( z/ R; V7 H" @
amic pituitary gonadal axis.1-3 Thus, greater empha-( l/ B% \% k$ ?: S6 E
sis has been given to neuroradiologic imaging in
8 c' F, \+ L- f/ ]9 T* tboys with precocious puberty. In addition to viril-& L: E& ~6 Y: Y6 g |8 R9 O. I
ization, the clinical hallmark of CPP is the symmet-
4 [3 C3 A+ x0 u! k$ f7 G$ mrical testicular growth secondary to stimulation by! ^, q1 r( @' _3 k3 [: X M
gonadotropins.1,3
) V' G0 [ x8 j9 qGonadotropin-independent peripheral preco-) k8 s- S' f q# z/ }. ]
cious puberty in boys also results from inappropriate7 j6 |4 c" c( a3 E
androgenic stimulation from either endogenous or9 c2 e/ A8 J N9 M' t; c% d. v
exogenous sources, nonpituitary gonadotropin stim-: K" @2 H0 v* K
ulation, and rare activating mutations.3 Virilizing& H, Y9 t: z8 |7 w0 c3 Z1 g
congenital adrenal hyperplasia producing excessive
! R7 M) r8 D' b' p8 V" t* Oadrenal androgens is a common cause of precocious
; r5 q6 o& U2 n$ bpuberty in boys.3,4
6 V: A" A! d1 F9 _, R0 g+ D& H% eThe most common form of congenital adrenal
: C( j/ G2 y" _0 h! Ahyperplasia is the 21-hydroxylase enzyme deficiency.
% l' |2 f6 r" H% pThe 11-β hydroxylase deficiency may also result in
8 Z: T# Q# ` U: |4 l8 Mexcessive adrenal androgen production, and rarely,
7 ]8 V' A7 \+ ]; k- u: h5 Van adrenal tumor may also cause adrenal androgen
; r C; S! N8 `3 uexcess.1,3
# ~+ R- x; N% O4 r9 Z9 ^at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
) D: d) d$ q" X7 S542 Clinical Pediatrics / Vol. 46, No. 6, July 2007: [/ L6 o `# Q& o$ g6 V# h
A unique entity of male-limited gonadotropin-& r) {% b9 i8 l! I6 }" o* n( g
independent precocious puberty, which is also known: z3 x- N( d! |# H0 M+ ?# o# j( _
as testotoxicosis, may cause precocious puberty at a
8 p- \( k# R# [very young age. The physical findings in these boys
* A0 G U8 f' K1 K8 O/ V4 Lwith this disorder are full pubertal development,
- M4 Q* H. o. H& w) x/ ] Bincluding bilateral testicular growth, similar to boys
6 j7 n+ m+ P" |6 I% Ywith CPP. The gonadotropin levels in this disorder
) k; y; U; O6 D! R$ v/ Care suppressed to prepubertal levels and do not show
8 O! g1 |" h; o7 \+ ], ~pubertal response of gonadotropin after gonadotropin-7 H+ [% g! N9 x
releasing hormone stimulation. This is a sex-linked- L7 f9 l# d/ K. K* j! s
autosomal dominant disorder that affects only# ]# t6 J; ?3 o: S. F) t" S
males; therefore, other male members of the family8 ?" ^+ ^5 ?6 S' {, ?
may have similar precocious puberty.3
% C1 z- A- k( H% A* q% b3 }8 AIn our patient, physical examination was incon-
7 [+ }# Y8 L, Z8 m# `sistent with true precocious puberty since his testi-
6 T! `( l( f ~5 y4 I5 h! n7 _cles were prepubertal in size. However, testotoxicosis1 p. }- F: N8 e- L- S6 e
was in the differential diagnosis because his father
# `& S+ S8 x. y$ i8 |% B6 ^started puberty somewhat early, and occasionally,4 H3 a2 ^1 l6 C/ w+ z$ t. l
testicular enlargement is not that evident in the4 ^" p( H- A2 V) o
beginning of this process.1 In the absence of a neg-
/ b/ l# g! P$ p' {9 i( mative initial history of androgen exposure, our
M- `+ i7 O1 ]* }6 wbiggest concern was virilizing adrenal hyperplasia,& P0 c1 C6 i, c# x; W( p/ G5 Y
either 21-hydroxylase deficiency or 11-β hydroxylase" R9 S+ {& F9 A( V! Q' l. S! ]+ g
deficiency. Those diagnoses were excluded by find-* b; s6 x% r- C5 ?
ing the normal level of adrenal steroids.
6 d$ F! v- `7 _2 w2 X* hThe diagnosis of exogenous androgens was strongly+ S& r. M- t8 ~4 A3 O
suspected in a follow-up visit after 4 months because* s5 A X2 ?8 n! u- g/ F
the physical examination revealed the complete disap-' k' Q3 s/ x# Y9 X. y. ^
pearance of pubic hair, normal growth velocity, and
/ J" j4 V! J3 W7 h6 D0 J) d$ jdecreased erections. The father admitted using a testos-
! u5 W, ~9 T. j$ ], K3 c% mterone gel, which he concealed at first visit. He was* K" @+ p" ~$ ^- ?* |3 t, u. {2 O
using it rather frequently, twice a day. The Physicians’4 `* D# X1 f+ i3 r
Desk Reference, or package insert of this product, gel or- ]" W( z2 z9 u% t/ p* w
cream, cautions about dermal testosterone transfer to: a# ]5 e7 _* H7 t* Y5 N
unprotected females through direct skin exposure.9 B( t& |/ u( C- W3 ^7 Z0 [
Serum testosterone level was found to be 2 times the
" v# p2 v8 Z* V& H; C. w2 b \1 Fbaseline value in those females who were exposed to" Y5 N5 i; Z- M, R3 l
even 15 minutes of direct skin contact with their male g. M; X* }2 i& @. A. c- ~
partners.6 However, when a shirt covered the applica-% `0 [# _: z* V
tion site, this testosterone transfer was prevented.
0 Q2 A. f: h; g9 B9 K5 c5 [Our patient’s testosterone level was 60 ng/mL,$ }- S) B- v) b5 `+ E1 S
which was clearly high. Some studies suggest that
0 R4 A+ {/ _. T7 rdermal conversion of testosterone to dihydrotestos-& g" l7 D, b# b0 F9 t
terone, which is a more potent metabolite, is more
( ^3 ]' A. q8 E" G( k6 |active in young children exposed to testosterone
2 y% ?8 U$ T; r" m, j9 R( X2 Jexogenously7; however, we did not measure a dihy-0 i& s+ W- P$ Q& d2 A* C F) r
drotestosterone level in our patient. In addition to
5 p6 Q$ T6 f0 |5 m+ S- kvirilization, exposure to exogenous testosterone in
, S: Y: `7 b2 A& m) ichildren results in an increase in growth velocity and( `4 z5 `" Z) K
advanced bone age, as seen in our patient.
) ]# {, p% u( e$ J. rThe long-term effect of androgen exposure during- \3 T' z$ ~' I
early childhood on pubertal development and final' r( O/ b& B% U& \
adult height are not fully known and always remain
" E. T3 e2 K; G7 [9 L5 wa concern. Children treated with short-term testos-
/ M; O* E7 }) ?1 ?: a- vterone injection or topical androgen may exhibit some
. q, d/ Q' z1 [8 g1 O6 Eacceleration of the skeletal maturation; however, after
5 s0 z3 }2 l- hcessation of treatment, the rate of bone maturation ], |9 [8 `% ?) b2 q) m" i6 }; H
decelerates and gradually returns to normal.8,9) B7 Y! D( i* w* {
There are conflicting reports and controversy5 D: G" V. Q E; E4 b; p: a" c0 T
over the effect of early androgen exposure on adult3 c( O3 z: M0 F1 `, g
penile length.10,11 Some reports suggest subnormal+ ^0 _& u# `7 y F& [ `# B) j
adult penile length, apparently because of downreg-
# y1 s! {& V+ j P* Z; C% o: N3 n, iulation of androgen receptor number.10,12 However," f: t1 M1 s5 c: f- _
Sutherland et al13 did not find a correlation between
) K1 j+ Z( x0 q( z8 n& q4 Ychildhood testosterone exposure and reduced adult% z( v& A0 `$ Q2 `" K
penile length in clinical studies.- r0 \' J ?$ D6 F! n
Nonetheless, we do not believe our patient is
' S4 H) w! b, b5 j0 D4 C+ Dgoing to experience any of the untoward effects from
; A6 v! t' b. [6 v& P. M& Qtestosterone exposure as mentioned earlier because) w; n( C/ M: l8 P! J
the exposure was not for a prolonged period of time./ G& h& y% q& T7 ?/ c& {8 _! V( X& j
Although the bone age was advanced at the time of4 ^) a0 Y( k* C* d& m& T
diagnosis, the child had a normal growth velocity at
; t N2 y; v/ J! H( y! sthe follow-up visit. It is hoped that his final adult9 J( S8 V( }: }) Q7 a
height will not be affected.: N8 ^ U) E9 d# w
Although rarely reported, the widespread avail-& Y6 h! e8 Y$ A( N: {6 \4 Y
ability of androgen products in our society may
% _. X# K' J2 q/ S1 Iindeed cause more virilization in male or female+ B9 ~' l4 }0 K
children than one would realize. Exposure to andro-5 g; v9 V. _; ^0 {
gen products must be considered and specific ques-
/ B X5 k- V3 B: Z6 m& Xtioning about the use of a testosterone product or
+ [# \( Y$ _6 T, Z% t# ^gel should be asked of the family members during6 ~3 X) ^; H) E+ s; i4 w# p* E% x7 _8 @
the evaluation of any children who present with vir-" D$ q- j! f+ w9 w* C
ilization or peripheral precocious puberty. The diag-' m" m' n! G) s- p
nosis can be established by just a few tests and by7 G. @7 E5 t% Y4 d- O# p$ g; b
appropriate history. The inability to obtain such a
: y; ~6 ^& w* r1 z% c& u/ O. ~) m. q5 rhistory, or failure to ask the specific questions, may
8 |, Z& H! s' g2 y7 Iresult in extensive, unnecessary, and expensive
, S4 p' n, G! j5 Linvestigation. The primary care physician should be8 i0 z8 N8 G% r" m9 a
aware of this fact, because most of these children
* B' }- t5 N! wmay initially present in their practice. The Physicians’# m) ^: k' e: _% a* W
Desk Reference and package insert should also put a
7 T7 h9 U3 W2 v. qwarning about the virilizing effect on a male or
+ ~3 u; S* g4 `0 G- ^5 \female child who might come in contact with some-
$ p6 X# G: y9 _; V: Pone using any of these products.
2 H% T2 ]( P9 A0 p" sReferences& K1 C. @2 j& O
1. Styne DM. The testes: disorder of sexual differentiation+ c( b/ I b/ a
and puberty in the male. In: Sperling MA, ed. Pediatric
2 t! `3 A) ]! P7 `0 G1 b. u6 UEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;" G6 _. ?, f* |1 l( t0 W5 l3 h
2002: 565-628.
( _4 }% ~4 G3 z* }- P2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious& b) k6 a* i& n6 D
puberty in children with tumours of the suprasellar pineal
. s: v7 Q9 m' j6 K6 lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from: ^0 }* C. a6 q- \
Topical Testosterone Exposure / Bhowmick et al 543- G1 ~4 Q" Y8 a/ y7 U# i8 q
areas: organic central precocious puberty. Acta Paediatr.9 ^: i ~! W" q: w2 U
2001;90:751-756.) ]( r1 [* s7 c% x3 |1 x/ D7 e- j
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.- {. n* z+ C# k$ R5 p9 U. C& H
Pediatric Endocrinology. 4th ed. New York, NY: Marcel9 S' r$ {( w9 t% Q* t2 P8 u
Dekker Inc; 2003:211-238.
. a( X' h& u& j/ B4 k. [- {$ {4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
$ @4 d1 M! H6 p1 Idevelopment in a two-year-old boy induced by topical9 O" G0 P! w/ \/ I% W @, J) r
exposure to testosterone. Pediatrics. 1999;104:e23.
& S8 w `' `' {5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
, L4 `. O7 Z- l& \. t) |Skeletal Development of the Hand and Wrist. 2nd ed.1 j5 ?9 g% U8 V( _) G& b( a% M5 f2 |# @
Stanford, CA: Stanford University Press; 1959.! E, o) G2 N* X- F
6. Physicians’ Desk Reference. Androgel 1% testosterone," m/ E2 _& _+ r% `2 O- l; W# W4 q
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
5 I& ?3 X$ Y( g: s5 gEconomics Company, Inc; 2004:3239-3241. x/ h7 R. X" v5 ~0 z8 ]4 i
7. Klugo RC, Cerny JC. Response of micropenis to topical- M9 C9 W6 z0 `: f& d, d
testosterone and gonadotropin. J Urol. 1978;119:2 Q% t& Q; U0 C- d$ B
667-668.
( T( s( S. |' X2 M* g7 m$ \8. Guthrie RD, Smith DW, Graham CB. Testosterone
! `& U7 a1 E4 u' q; ~; a* f) Vtreatment for micropenis during early childhood. J Pediatr.
* x G+ j3 m$ ]9 s1973;83:247-252.
. C% J5 l) K Q8 Q/ f" P7 ?9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone+ ^; x: W4 G& W6 i! _: B
therapy for penile growth. Urol. 1975;6:708-710.
0 {% B& Q Y% f& S! |10. Husmann DA, Cain MP. Microphallus: eventual phallic( M0 b9 M# a8 u% E& l
size is dependent on the timing of androgen administra-
- R' h E9 u J4 B8 ^* w ?tion. J Urol. 1994;152:734-739.
" `" g- Z1 x( Z% A$ `11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
/ f* n4 ^ s) a' Fdoes early treatment with testosterone do more harm- t9 K& [9 c+ T& g1 z3 g; F& @* n
than good? J Urol. 1995;154:825-829.& e' c3 K3 C8 T
12. Takane KK, George FW, Wilson JD. Androgen receptor B! O9 p2 B' x2 R5 U, J" e# _& d
of rat penis is down-regulated by androgen. Am J Physiol.0 v4 a5 u. \6 E( o7 z
1990;258:E46-E50.
- R+ o5 u: }& A8 w' H13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
6 g: Z7 d9 ~. Nof prepubertal androgen exposure on adult penile
6 P( h3 ]; Z0 q9 S% T6 tlength. J Urol. 1996;156:783-787. |
|