- 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
5 F7 W$ Z% Q+ O9 j a' r$ eprecocious puberty (CPP), which is mediated
F% ?% x: x$ |8 l! uthrough the hypothalamic pituitary gonadal axis, has
1 I& `# s$ X7 X4 Z5 y9 ca higher incidence of organic central nervous system
% p, R* d. L+ R: [' h* \$ K- plesions in boys.1,2 Virilization in boys, as manifested0 r, h$ e5 G5 I& |6 A
by enlargement of the penis, development of pubic
4 Q; _' i$ U* m# S1 [1 h7 K# }7 ehair, and facial acne without enlargement of testi-
: ~1 v j! A0 S `cles, suggests peripheral or pseudopuberty.1-3 We* r& E! H9 V9 ~& m0 I/ t0 v
report a 16-month-old boy who presented with the
' X% D8 q" [: m, y0 Q8 s& zenlargement of the phallus and pubic hair develop-. f0 j( z/ S V. ~1 z6 _4 O
ment without testicular enlargement, which was due6 x2 \2 d/ m+ G7 M8 E: H
to the unintentional exposure to androgen gel used by7 b9 c8 J) `: ]" S
the father. The family initially concealed this infor-6 R2 c, D6 u$ O
mation, resulting in an extensive work-up for this
) y8 Z' e2 P& \! j( k# X/ D) _; uchild. Given the widespread and easy availability of
- [ y/ c% C3 `9 S& g; _testosterone gel and cream, we believe this is proba-
9 ~& d% i5 ?" v7 ebly more common than the rare case report in the2 @5 t& g }% o S, }, J4 l
literature.4) d- Y0 |( a8 x9 d1 n# K5 R9 v y
Patient Report0 b- s4 f1 N( @* D1 W4 E
A 16-month-old white child was referred to the
/ F! b) M5 q: R9 }0 nendocrine clinic by his pediatrician with the concern
+ J4 v& ]) C) C. A! \) cof early sexual development. His mother noticed) p8 T* l$ b2 x, K I" `7 [
light colored pubic hair development when he was: |+ `2 t' S& ]: u
From the 1Division of Pediatric Endocrinology, 2University of, z* C$ M$ ~5 T8 X5 t
South Alabama Medical Center, Mobile, Alabama.* [/ B& W0 T8 X: {
Address correspondence to: Samar K. Bhowmick, MD, FACE,: }0 F) ~" L1 E
Professor of Pediatrics, University of South Alabama, College of
7 i" n0 m. d& ~# L; n) a& zMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
5 Y; ~, X+ m! `* ?. {+ Y( Re-mail: [email protected].6 F$ S: e! A8 U" @
about 6 to 7 months old, which progressively became& d9 ~5 {# Z9 ~
darker. She was also concerned about the enlarge-1 c$ {7 N0 |$ A! X9 f
ment of his penis and frequent erections. The child
. {5 V, ~9 l0 J' ]" t2 Awas the product of a full-term normal delivery, with
1 S j* v. ]3 Y% L8 o! z- u! p% Ba birth weight of 7 lb 14 oz, and birth length of
6 l) O: L9 Q" ~) T; ], k20 inches. He was breast-fed throughout the first year" @* ?& d- q' a; ? }1 A* M
of life and was still receiving breast milk along with
2 r' N3 ^& L7 a( I5 X( O. gsolid food. He had no hospitalizations or surgery,
5 {$ f# T4 `, \5 ]1 L! h& G" Oand his psychosocial and psychomotor development
5 M `% J6 }* Q2 w3 R8 dwas age appropriate.
4 ~4 y2 }1 x! v% ~The family history was remarkable for the father,
# s& h5 R" ]; @$ N1 t |who was diagnosed with hypothyroidism at age 16,( d2 i: K. V9 Q7 A
which was treated with thyroxine. The father’s
5 ~8 O+ s( Z# \% L% q/ Hheight was 6 feet, and he went through a somewhat
1 S: T$ |1 I# r. {0 _early puberty and had stopped growing by age 14.
' O5 k, z- m o* e# o, l: GThe father denied taking any other medication. The$ L, o6 ]2 G" e
child’s mother was in good health. Her menarche
" h) {' {3 c& }/ q$ fwas at 11 years of age, and her height was at 5 feet& n1 q6 `% [4 b% z( e
5 inches. There was no other family history of pre-
4 U$ T0 y' G2 H4 P4 Jcocious sexual development in the first-degree rela-
7 k/ v7 c8 a% X; F) s% W4 H3 |1 Qtives. There were no siblings.0 l$ V# Q9 L0 X9 L4 Y- m
Physical Examination
2 g& `. ^2 a: Y, s* Y/ Q! O) kThe physical examination revealed a very active,; l6 a6 n" L4 N L- {
playful, and healthy boy. The vital signs documented
7 v& x' {6 A9 ^+ j3 ea blood pressure of 85/50 mm Hg, his length was
; B- J: p# J* ^- R. N2 \, L90 cm (>97th percentile), and his weight was 14.4 kg" E# @5 H2 }2 Q/ f3 f
(also >97th percentile). The observed yearly growth8 F& T; J; L2 G. g7 }4 c# W9 ~: l
velocity was 30 cm (12 inches). The examination of
4 G+ Z7 h, z9 L* o! Jthe neck revealed no thyroid enlargement.
- a4 n, s( B q" s' M* p3 hThe genitourinary examination was remarkable for# L( B& H3 H9 ~, Y, s! J* T
enlargement of the penis, with a stretched length of8 C; H$ P; ~6 x
8 cm and a width of 2 cm. The glans penis was very well% T6 H% i; [2 f' ?* ?, K4 [
developed. The pubic hair was Tanner II, mostly around; U9 M! P% }/ h3 V+ Z
5401 h5 s8 H( `+ G* S& e0 J) N
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 _/ [+ y6 Q6 l; X3 v( t: E
the base of the phallus and was dark and curled. The
/ B; m- }$ _- }. w* \% [8 C7 X/ @testicular volume was prepubertal at 2 mL each.+ c5 n2 j* @' z* J( G
The skin was moist and smooth and somewhat6 i: z8 |+ F& D
oily. No axillary hair was noted. There were no
: [, ]1 C6 g1 g: z. E3 A; Mabnormal skin pigmentations or café-au-lait spots.4 ~; N2 T2 i$ H" m6 _2 |
Neurologic evaluation showed deep tendon reflex 2+
3 @9 L6 }- r! p' ^+ w$ b- V, J2 v, {& bbilateral and symmetrical. There was no suggestion8 R8 j4 \& V+ o
of papilledema., N# \0 H) c2 M2 M6 A5 T
Laboratory Evaluation
. y: }/ R! q6 z0 PThe bone age was consistent with 28 months by
, o# I( e5 u* O, ^. qusing the standard of Greulich and Pyle at a chrono-7 \6 j/ ?& A* X
logic age of 16 months (advanced).5 Chromosomal
j9 b% h+ w% K0 \* |karyotype was 46XY. The thyroid function test, P2 J0 q$ J9 l) Q: F
showed a free T4 of 1.69 ng/dL, and thyroid stimu-# @& Y! X5 |0 N; i; R" ^! b
lating hormone level was 1.3 µIU/mL (both normal).
9 r0 A }4 e! Z6 iThe concentrations of serum electrolytes, blood% V P5 K; v* U. Z; q d* g/ }9 q3 U
urea nitrogen, creatinine, and calcium all were
+ g. T4 I& ~. b4 twithin normal range for his age. The concentration
4 D# w2 G8 s+ L% @0 _' Nof serum 17-hydroxyprogesterone was 16 ng/dL
+ i9 ?9 J" D- l: o: |6 j5 `(normal, 3 to 90 ng/dL), androstenedione was 20
* Y5 o" F" H0 a- r* }5 F6 Mng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-8 E% k8 S" n& }7 j
terone was 38 ng/dL (normal, 50 to 760 ng/dL),- a, m: b9 y& p& X4 f% d) H8 ~
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
1 n ]# y. _; o$ A9 @6 B5 H( Z! e49ng/dL), 11-desoxycortisol (specific compound S)
8 a& K. b3 m, s# h1 ]" A7 pwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-3 ?& L! ]8 _) z
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total/ [. T$ O# ?, _- ? V
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),( O& W) O8 [" h! w
and β-human chorionic gonadotropin was less than
; h' b$ A. c: P9 e5 mIU/mL (normal <5 mIU/mL). Serum follicular! S0 @1 c! x% X- N1 ^/ O! l
stimulating hormone and leuteinizing hormone: D" ~$ M% b; y' x' R {; f$ [
concentrations were less than 0.05 mIU/mL
$ P$ `4 ]) i6 O1 }(prepubertal).( D+ \& ^2 m- q" u1 u
The parents were notified about the laboratory$ H6 l e6 a ^* B% [# u
results and were informed that all of the tests were2 \) q- g" T; p8 r& h
normal except the testosterone level was high. The
: }& J$ p$ t ?follow-up visit was arranged within a few weeks to& O2 l+ |* G$ a3 K2 T$ L0 b
obtain testicular and abdominal sonograms; how-
C3 _$ O9 T5 R2 Mever, the family did not return for 4 months.
& w7 B( n: @1 x- m$ YPhysical examination at this time revealed that the
6 ]! p4 n4 b0 C {: k( N. jchild had grown 2.5 cm in 4 months and had gained
, s8 B) t6 {, H2 kg of weight. Physical examination remained
# `& i, V- T# f" U3 aunchanged. Surprisingly, the pubic hair almost com-, c! ^$ J- X/ u# l1 U3 ?( d: T
pletely disappeared except for a few vellous hairs at: E$ e* }# X, M6 i$ Z7 C$ G
the base of the phallus. Testicular volume was still 2
7 l1 a N$ H' f- n- J; ^& LmL, and the size of the penis remained unchanged.- X" s0 `- |- b/ }$ N+ g$ n
The mother also said that the boy was no longer hav-
2 |% R5 k( h0 |' B! iing frequent erections.
* _8 q; v. ~; C' s1 KBoth parents were again questioned about use of
4 k8 i; e3 _: I' w( I& u* a& Xany ointment/creams that they may have applied to
* v# f( e5 n( X7 othe child’s skin. This time the father admitted the
) z1 k0 X4 i! ZTopical Testosterone Exposure / Bhowmick et al 541
% P9 X1 j( M) duse of testosterone gel twice daily that he was apply-
+ Q8 j/ i" }& s( x: wing over his own shoulders, chest, and back area for
' r1 E- i& p7 @- J3 q3 ga year. The father also revealed he was embarrassed
8 M# C0 |1 G" z0 f7 ~* ]$ lto disclose that he was using a testosterone gel pre-
3 ~& W2 `2 D% c4 e9 Y7 o+ `0 R; Zscribed by his family physician for decreased libido
3 E+ m! f# m2 w: d/ p- u# R! usecondary to depression.( }* ~3 c5 x( z7 R5 I1 `
The child slept in the same bed with parents.
5 O9 J! B( f; T2 AThe father would hug the baby and hold him on his
3 ^9 d& S; W- b4 k2 U. F/ ochest for a considerable period of time, causing sig-$ L' A, R: Z5 u" }
nificant bare skin contact between baby and father.
$ l! e' ~; _/ k- i8 v8 v; qThe father also admitted that after the phone call,
# R L- N4 W) L, h, q1 S% Uwhen he learned the testosterone level in the baby/ p: F5 \5 {; R9 ? {9 n2 Q
was high, he then read the product information
. B) C1 z/ V# m" m( R! O$ Mpacket and concluded that it was most likely the rea-
5 R/ o4 {; \2 q% }. [2 bson for the child’s virilization. At that time, they
% d0 f% F) T5 Z- Kdecided to put the baby in a separate bed, and the
4 ? H# H& P9 v/ P, Y3 ffather was not hugging him with bare skin and had
' I) h" I) a$ Y/ }- h8 k6 H0 tbeen using protective clothing. A repeat testosterone M- ~7 W$ B2 G* _# \$ N2 \1 w
test was ordered, but the family did not go to the. W% |& n- _' |" ]; L
laboratory to obtain the test.- G: Z1 |6 B% z" n
Discussion
! X0 A3 e6 Y- m H2 w' {Precocious puberty in boys is defined as secondary
1 @" l0 j6 k8 c, J* K" m! q% w% Hsexual development before 9 years of age.1,4
, @3 G5 J9 [% ]: LPrecocious puberty is termed as central (true) when
) J8 ?+ J6 K8 ~7 G6 ]5 lit is caused by the premature activation of hypo-# F3 h% j2 K) Q7 q
thalamic pituitary gonadal axis. CPP is more com-0 X) j9 n# s6 J) i" i
mon in girls than in boys.1,3 Most boys with CPP: f# V# L! v+ `
may have a central nervous system lesion that is6 I8 e% v- r, f
responsible for the early activation of the hypothal-' b# n+ d( G* ~" @3 b+ s
amic pituitary gonadal axis.1-3 Thus, greater empha-
0 Y: z' J3 S. N2 _sis has been given to neuroradiologic imaging in9 u4 L" R7 l6 E8 q# E2 h
boys with precocious puberty. In addition to viril-7 e8 ]1 q" V# c7 P `) c
ization, the clinical hallmark of CPP is the symmet-
9 @- A( u S, m9 j7 z/ F. Grical testicular growth secondary to stimulation by% s1 m G- x1 z+ K
gonadotropins.1,3$ m3 H8 U: y& K4 e# B# a
Gonadotropin-independent peripheral preco-
' t1 e [/ j7 icious puberty in boys also results from inappropriate
" B$ x3 |% p, F8 Yandrogenic stimulation from either endogenous or# N y) x3 P$ i. @! y
exogenous sources, nonpituitary gonadotropin stim-
5 b- |+ O+ x7 A8 P4 fulation, and rare activating mutations.3 Virilizing
& D5 n/ C/ F. v& r& j% C9 ycongenital adrenal hyperplasia producing excessive& R, k: C: R9 R5 v2 A) s3 V
adrenal androgens is a common cause of precocious0 U7 Q* `% o; ?6 W- _
puberty in boys.3,4
( J2 Q* n" H9 \6 G4 uThe most common form of congenital adrenal
2 u% [) z' D1 r# Q+ f3 [hyperplasia is the 21-hydroxylase enzyme deficiency.
$ s# y/ e7 @+ n( RThe 11-β hydroxylase deficiency may also result in
* y: @; K$ ~' Hexcessive adrenal androgen production, and rarely,
! q" S3 Z2 C: {( r; k' q. X9 dan adrenal tumor may also cause adrenal androgen
& ~- N( m* q1 m' e" j2 oexcess.1,3
( N8 s3 ]8 o' t: Y8 mat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; T y% `; S) \2 Y6 `
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007/ T% _& Z: |- B, q
A unique entity of male-limited gonadotropin-
$ F5 o: r. ?; m: U$ u4 B. `- lindependent precocious puberty, which is also known3 O2 O- \9 G' _+ L" R' O
as testotoxicosis, may cause precocious puberty at a
$ T1 V" a( ^2 P8 j5 avery young age. The physical findings in these boys. B G% _( n0 t5 ~1 T; N
with this disorder are full pubertal development,
! Z# K9 X2 D u8 P8 ]including bilateral testicular growth, similar to boys- Q8 X" l$ h+ p
with CPP. The gonadotropin levels in this disorder1 f3 b! R+ U$ H& U3 _
are suppressed to prepubertal levels and do not show
. l( l: A+ G% a [% L! `pubertal response of gonadotropin after gonadotropin-& Z& R/ r9 H4 z
releasing hormone stimulation. This is a sex-linked
* M% @7 A4 M8 q- rautosomal dominant disorder that affects only$ o- w ^" |, e1 F- y0 F
males; therefore, other male members of the family, t6 t5 H8 H, b! z5 ~& u! n
may have similar precocious puberty.3 S4 E [- h# p6 a+ e- n
In our patient, physical examination was incon-
8 R$ t2 x/ H- u$ b( S+ lsistent with true precocious puberty since his testi-8 Q4 H; T1 B _$ c/ O
cles were prepubertal in size. However, testotoxicosis
/ G7 ^2 P- W% y# T4 Ywas in the differential diagnosis because his father' S4 t7 f4 n, G6 q0 T3 {+ Q' D+ g
started puberty somewhat early, and occasionally,
' S' z5 S) \9 b# S5 s& b' g9 p- ]testicular enlargement is not that evident in the; v% U0 u2 y- l) m+ w
beginning of this process.1 In the absence of a neg-
' H- m; ? s6 G* ~* S+ H0 }/ Fative initial history of androgen exposure, our
" i1 ?1 Y e. ?biggest concern was virilizing adrenal hyperplasia,& a9 l" P! T+ i. r. N
either 21-hydroxylase deficiency or 11-β hydroxylase
5 @( E! P# j; H1 Y0 Y7 cdeficiency. Those diagnoses were excluded by find-
3 S5 K+ ?2 O- b' z9 h/ Ning the normal level of adrenal steroids.2 I6 W! a8 q. a0 D6 S& ^ H
The diagnosis of exogenous androgens was strongly9 l# n: d2 f9 }# Q9 V2 M$ R" {
suspected in a follow-up visit after 4 months because
: w4 i9 [) |# i9 n* q' Qthe physical examination revealed the complete disap-
$ l6 d( B6 e: r5 \9 Npearance of pubic hair, normal growth velocity, and
+ k1 z1 B5 g# E2 V# {% Wdecreased erections. The father admitted using a testos-
/ x5 l& P+ }: c4 p0 X, C+ _terone gel, which he concealed at first visit. He was* D7 G+ }) c# G( j, W1 l* F8 A* d
using it rather frequently, twice a day. The Physicians’- `6 i0 |2 ?2 S9 x
Desk Reference, or package insert of this product, gel or) f0 l3 E$ G7 S8 z. B, |+ F
cream, cautions about dermal testosterone transfer to
0 E: A, i3 d/ a2 yunprotected females through direct skin exposure.
3 T8 l+ E6 h% z8 z, S" XSerum testosterone level was found to be 2 times the" Q% ^/ s" C! H! l W8 O$ g
baseline value in those females who were exposed to) [9 P$ F, F! c5 ]1 [4 ^, O
even 15 minutes of direct skin contact with their male
0 P) V' ^% E% {, w5 [$ a8 T4 w7 Npartners.6 However, when a shirt covered the applica-1 Z* V( H4 E1 O2 T8 M6 e
tion site, this testosterone transfer was prevented.# c& [; ]" W3 _9 |
Our patient’s testosterone level was 60 ng/mL,
6 i4 t# B$ l3 G# n1 N6 v+ O5 Kwhich was clearly high. Some studies suggest that. } G2 Y, [& N/ B, I. _, l
dermal conversion of testosterone to dihydrotestos-
1 B$ ^- O( _; e) [+ Z8 nterone, which is a more potent metabolite, is more
6 A% d2 [; B4 r$ ?7 s% Jactive in young children exposed to testosterone
3 Y; N( i: }6 V, {0 M! W y; w+ sexogenously7; however, we did not measure a dihy-% V/ L) J7 C- C
drotestosterone level in our patient. In addition to1 S0 S2 x# q4 |& l% N P; U# t, R
virilization, exposure to exogenous testosterone in
' ^% M: C1 b. [children results in an increase in growth velocity and# r: U3 n% l$ j5 g# @
advanced bone age, as seen in our patient.
% L( l6 U8 f% L4 Z, y$ G; d; gThe long-term effect of androgen exposure during% {1 n5 k& R' H1 [4 \8 i* E
early childhood on pubertal development and final, `9 M4 E# I$ K5 L
adult height are not fully known and always remain
/ e7 t3 I( |% m: z! V. W( c- Sa concern. Children treated with short-term testos-" @) p& r/ L0 h/ M
terone injection or topical androgen may exhibit some
) ]' _; D. I$ b8 Gacceleration of the skeletal maturation; however, after9 K5 @0 A. G" y$ o; {$ }# ^
cessation of treatment, the rate of bone maturation- ~# V# A" ?/ V% M
decelerates and gradually returns to normal.8,9, }+ @9 a& p( R5 O6 \7 h7 N
There are conflicting reports and controversy& s- |# ], x& c9 H; y) C
over the effect of early androgen exposure on adult
% e2 `# _5 s6 _% Hpenile length.10,11 Some reports suggest subnormal$ q5 ?. c7 }, L" z( p
adult penile length, apparently because of downreg-
$ O$ v0 I/ r1 \# }# d7 @6 H6 Aulation of androgen receptor number.10,12 However,
; N$ y/ @- w, ASutherland et al13 did not find a correlation between
5 Y2 ^9 u, k" Z, t. g2 schildhood testosterone exposure and reduced adult
* r" p0 Q+ T3 Q+ w2 `9 rpenile length in clinical studies.! o" N4 Z4 ^ M& `" M( ^3 V
Nonetheless, we do not believe our patient is
- a y4 o4 P, J# O9 O( ?& t; Egoing to experience any of the untoward effects from
* D/ [/ S! u% o9 D% ?' u$ `testosterone exposure as mentioned earlier because0 N! `5 N" X4 B! |( h* @
the exposure was not for a prolonged period of time.5 q+ X5 c* Q& L
Although the bone age was advanced at the time of( \; Q8 a. S9 t/ ^4 \
diagnosis, the child had a normal growth velocity at
* f: y8 G% s6 e+ L. R$ p" ethe follow-up visit. It is hoped that his final adult
, T$ }) ?3 t! N! b8 m" S. f% r( theight will not be affected./ L' D6 T3 H% V( F& G
Although rarely reported, the widespread avail- F: X: h7 B/ Y& o7 t, K
ability of androgen products in our society may
( w. r/ S0 F% ^# w& E0 C# Xindeed cause more virilization in male or female
9 Q2 U5 Z/ z6 U" echildren than one would realize. Exposure to andro-. a) i5 u/ H* c' M
gen products must be considered and specific ques-# J( Q% c; o8 s% i3 l
tioning about the use of a testosterone product or0 h! y$ s4 F; _/ D( t# W" p5 b/ b
gel should be asked of the family members during$ f# w/ @: G! s9 d; S/ p7 c5 `% ]5 D
the evaluation of any children who present with vir-
1 u( @4 g1 P! Z: J! H& Cilization or peripheral precocious puberty. The diag-
# _$ @* r: U* u. L/ X6 Y, J7 m; R) jnosis can be established by just a few tests and by4 W$ @6 r( c" y2 u) g) v5 e1 a3 z
appropriate history. The inability to obtain such a/ Y" w* H1 Z& y: b
history, or failure to ask the specific questions, may/ K( k: G) ?' y" Z+ a9 v/ v6 X
result in extensive, unnecessary, and expensive+ r K% s: `- e3 c: [2 c% W
investigation. The primary care physician should be
, A; ^- |' \3 N2 b- Paware of this fact, because most of these children. f0 q3 y" D& Z% z3 I8 a& @9 c
may initially present in their practice. The Physicians’
) T+ f3 D& K6 _Desk Reference and package insert should also put a% N5 X" Q6 }3 M0 g; a9 Q! t
warning about the virilizing effect on a male or3 j7 c# u) [& t2 b* |0 _( t
female child who might come in contact with some-7 m' w# Y0 H9 c7 M; \
one using any of these products.
9 m% T$ e9 A: I$ KReferences
0 m( P N1 Y/ i8 H( W1. Styne DM. The testes: disorder of sexual differentiation
2 i; a/ C- Q7 M0 Vand puberty in the male. In: Sperling MA, ed. Pediatric
3 O0 @) G; G/ c; [2 O- C# Z; K BEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
# G" n# }5 z6 | \2002: 565-628.
) {( `: [' U4 S& ^2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious4 J/ [3 i+ Q9 \* R3 K. ?# ~: h
puberty in children with tumours of the suprasellar pineal
0 k# N; Q( M$ u3 }2 _5 wat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, E ^# _8 b, v3 c# E6 K/ FTopical Testosterone Exposure / Bhowmick et al 543; v3 t) m; o6 j4 e( l! R% g+ D
areas: organic central precocious puberty. Acta Paediatr.
|; t, Z3 I) F, p! L+ a2001;90:751-756.2 c# l2 \) G( u( s8 l& r
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.( M4 u, j9 G/ t& z8 b) E2 L7 ]) f
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
8 D% x; p* G' g% VDekker Inc; 2003:211-238.; E" i! L+ u# e
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
: e) j* k# z! ^# Udevelopment in a two-year-old boy induced by topical8 T: O/ ^$ `/ p3 ~" r7 ? \
exposure to testosterone. Pediatrics. 1999;104:e23.; _6 A# ]7 |: j1 W
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of. G( a1 U: U% S2 \8 S1 M$ A
Skeletal Development of the Hand and Wrist. 2nd ed.
1 G W# L7 S, G2 U3 {Stanford, CA: Stanford University Press; 1959.- C0 E9 z# D6 Q% @. Y
6. Physicians’ Desk Reference. Androgel 1% testosterone,/ ^2 ?. Q$ D" J8 Z- o ?
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
0 G$ G+ R9 h! u ^8 ^* n, [Economics Company, Inc; 2004:3239-3241.
6 V# T. A7 s' Q+ ?; i7. Klugo RC, Cerny JC. Response of micropenis to topical/ N" v* b& e9 T1 n+ I1 Z, C/ x
testosterone and gonadotropin. J Urol. 1978;119:
3 g+ ?0 G8 C9 Q, K$ t667-668.
+ Y; a8 h0 ~( i* l! x3 d1 _$ @3 K8. Guthrie RD, Smith DW, Graham CB. Testosterone5 k/ {: f, o" F5 h2 b
treatment for micropenis during early childhood. J Pediatr.
6 z' s* o3 o6 T, h7 y/ @1973;83:247-252.
- h+ S' @9 K& \" S5 M1 n9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
5 E* ~: \5 i4 y4 Wtherapy for penile growth. Urol. 1975;6:708-710.8 H( a6 |. W3 V; ^
10. Husmann DA, Cain MP. Microphallus: eventual phallic/ K3 `; Z p8 f
size is dependent on the timing of androgen administra-/ i5 Y" n* X1 A$ ]+ B
tion. J Urol. 1994;152:734-739.
`2 ~/ c; R4 U% ~ {11. McMahon DR, Kramer SA, Husmann DA. Micropenis:0 p9 V4 j5 W& k. l
does early treatment with testosterone do more harm# N- |2 R) G) p: m
than good? J Urol. 1995;154:825-829.9 Y6 m" }/ g0 t0 O0 g
12. Takane KK, George FW, Wilson JD. Androgen receptor
. m) q& p: S+ Y" b- h: tof rat penis is down-regulated by androgen. Am J Physiol. G8 Z6 E! S q7 Q) ~' u* \
1990;258:E46-E50.
! _5 h6 S9 o; F* ^" ?3 K) _13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect8 i1 j+ x/ ~( {2 V9 U) [8 X1 p% v# ^
of prepubertal androgen exposure on adult penile
' `8 T- j; T5 @& x- K) X0 dlength. J Urol. 1996;156:783-787. |
|