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is a significant concern for physicians. Central0 c: g5 d- U7 v" U/ |
precocious puberty (CPP), which is mediated
1 f% O& j! v5 X% Pthrough the hypothalamic pituitary gonadal axis, has
& c4 t h% S2 aa higher incidence of organic central nervous system# y5 D+ c% h& m4 t6 y+ t
lesions in boys.1,2 Virilization in boys, as manifested; J& Y: M8 C7 E
by enlargement of the penis, development of pubic5 B# f& C* [. Z1 I9 `
hair, and facial acne without enlargement of testi-9 I4 Z3 |/ B/ z+ F% o" m: [
cles, suggests peripheral or pseudopuberty.1-3 We4 {% f' O5 |" W a5 j d# m6 D
report a 16-month-old boy who presented with the* Q7 a2 z9 j6 N
enlargement of the phallus and pubic hair develop-# j) S/ V6 P, y% N# I. s( e3 ?
ment without testicular enlargement, which was due
5 g/ a0 B2 F* S+ f8 G: e+ Pto the unintentional exposure to androgen gel used by
8 I$ g8 E" A" k+ E1 x% Ethe father. The family initially concealed this infor-, t+ f3 n" P C- p& C- T* @1 _
mation, resulting in an extensive work-up for this
% Z, A2 ]% V# x' y7 Mchild. Given the widespread and easy availability of, g* S K) J' U4 O0 x& O
testosterone gel and cream, we believe this is proba-* M/ h8 m0 F/ L6 E
bly more common than the rare case report in the
* ]) G! k) C; i5 Y9 vliterature.4* A% R9 | T" a; }0 g
Patient Report) u( P) a _! |# M- q0 ` C7 {9 q
A 16-month-old white child was referred to the
* }$ H+ x# Y5 Q) U8 }9 Pendocrine clinic by his pediatrician with the concern
0 s, f; W( [) o, N9 Jof early sexual development. His mother noticed9 x4 S7 W+ {# _+ E& s7 E
light colored pubic hair development when he was& s+ G# h% S9 ^. k5 S5 @8 D
From the 1Division of Pediatric Endocrinology, 2University of4 R: M2 e; o/ K3 M1 p. C" i
South Alabama Medical Center, Mobile, Alabama.( o2 A( ]" k9 V& ^- {
Address correspondence to: Samar K. Bhowmick, MD, FACE,
$ j+ p5 ]8 o. C; bProfessor of Pediatrics, University of South Alabama, College of2 A; U6 ?& M, h+ T) Z' ^
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;5 s6 h- C" U0 R' A- B0 _# p4 w
e-mail: [email protected].
( ]7 l. U. W/ C( Q5 a; E1 V4 D# V1 rabout 6 to 7 months old, which progressively became
4 G: b* u7 F+ K) ~9 P6 Odarker. She was also concerned about the enlarge-
' A0 z) h: v+ v: Y6 S2 u$ T+ ~ment of his penis and frequent erections. The child
3 x% _7 p% i3 E2 h }was the product of a full-term normal delivery, with
5 k6 p, E! L/ ?1 a! Fa birth weight of 7 lb 14 oz, and birth length of' p$ c' J* r. G" }
20 inches. He was breast-fed throughout the first year
: v" C, Y6 E0 |of life and was still receiving breast milk along with
) q& o+ b8 ]4 V$ i4 ]' K4 Bsolid food. He had no hospitalizations or surgery,7 k7 B7 d* o0 F0 _6 U7 k
and his psychosocial and psychomotor development4 l7 [7 D, s% Z/ w. o1 D& W4 x
was age appropriate.
; u S v7 T3 \0 r5 t$ G7 i% T! wThe family history was remarkable for the father,
, X- @6 M3 I! f8 twho was diagnosed with hypothyroidism at age 16,- E, d3 L. f1 P& f
which was treated with thyroxine. The father’s
% L2 b0 b, W U, Q! Z& Zheight was 6 feet, and he went through a somewhat
. U" P6 w# H1 f4 Tearly puberty and had stopped growing by age 14.
! A9 S# |/ [3 [. I. H4 o- G7 |The father denied taking any other medication. The# y$ y! v; e9 m8 m8 c: f
child’s mother was in good health. Her menarche& {- |: [) }9 X1 K. [5 J/ q
was at 11 years of age, and her height was at 5 feet
+ P0 u- n: j- \9 [% D5 inches. There was no other family history of pre-
0 G4 s8 m0 }% B, A7 S6 r- bcocious sexual development in the first-degree rela-6 A* d0 b3 Q$ J' @& r9 o' X
tives. There were no siblings.
# P0 ]2 T* o1 F# e, B+ CPhysical Examination
, S, R5 M& a6 {$ ?The physical examination revealed a very active,
+ D! ]3 o+ {# F& j; ?playful, and healthy boy. The vital signs documented
/ q% t; U2 z4 v6 R8 Ra blood pressure of 85/50 mm Hg, his length was1 y' e0 \0 m7 P
90 cm (>97th percentile), and his weight was 14.4 kg' a2 E0 o% F6 U. F/ ?
(also >97th percentile). The observed yearly growth
, ^: W k( w2 c; uvelocity was 30 cm (12 inches). The examination of9 q0 K4 a1 I7 v0 l% M
the neck revealed no thyroid enlargement.# e0 c- J' k) r2 \. w" U
The genitourinary examination was remarkable for
) j' G, b& b( {+ Tenlargement of the penis, with a stretched length of
+ U; E) V, ? K8 cm and a width of 2 cm. The glans penis was very well
H, o9 g) N( M! }: Udeveloped. The pubic hair was Tanner II, mostly around
- {/ @/ c6 L4 f# j0 f* M540
# u. p2 @% s7 j' Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 u& x6 F0 y+ F6 n" D
the base of the phallus and was dark and curled. The
6 n0 f+ I7 ?% T; C( A* \3 `testicular volume was prepubertal at 2 mL each.( V+ t" v( R" T9 Q
The skin was moist and smooth and somewhat6 d; S' q" V$ K: l3 w L1 b
oily. No axillary hair was noted. There were no8 V/ a8 S& c# m. h0 o2 F6 i$ i# O8 m3 @
abnormal skin pigmentations or café-au-lait spots.
- W0 x9 {; R5 v7 N. h8 u# \+ GNeurologic evaluation showed deep tendon reflex 2+
( i4 S: @- p; F7 Qbilateral and symmetrical. There was no suggestion
* `! P- c0 q$ J$ ~" X3 |of papilledema.- U! o( R; k7 C
Laboratory Evaluation
1 t- {! c/ T! eThe bone age was consistent with 28 months by% j/ v( O! W! Q8 R6 h" c! Z
using the standard of Greulich and Pyle at a chrono-
* J1 _+ Y, l, a: Alogic age of 16 months (advanced).5 Chromosomal% w5 }, |! L( U# g
karyotype was 46XY. The thyroid function test
! U @2 C' b: F# e8 A+ S! ~: Pshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
6 G* ~- f. F5 d1 B& ~lating hormone level was 1.3 µIU/mL (both normal).2 C$ [1 d$ l/ B/ x" o% \
The concentrations of serum electrolytes, blood
7 V/ ~$ N; a9 J3 E# t+ v. ~urea nitrogen, creatinine, and calcium all were
; S4 _ g2 V4 h; Fwithin normal range for his age. The concentration
' W! T- n. X: O7 t7 s: X1 @of serum 17-hydroxyprogesterone was 16 ng/dL0 u0 `8 C/ k, K. m$ ~) @) k
(normal, 3 to 90 ng/dL), androstenedione was 20
6 M8 ~ P7 C0 U9 j8 R8 Y; R5 D% Ung/dL (normal, 18 to 80 ng/dL), dehydroepiandros-+ k2 O, z" `- I7 y
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
5 j3 a2 s2 f h% }desoxycorticosterone was 4.3 ng/dL (normal, 7 to1 H1 P* Q) p) e* j9 p6 K
49ng/dL), 11-desoxycortisol (specific compound S)2 E A9 j+ R3 m, L
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
: V8 c5 P2 o6 N* m* `" Ctisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
/ f4 k! f; B5 M v5 R) Atestosterone was 60 ng/dL (normal <3 to 10 ng/dL),. D. p+ [+ s6 n% E4 ~9 X
and β-human chorionic gonadotropin was less than8 T9 l+ K" s' E3 ]; c) t
5 mIU/mL (normal <5 mIU/mL). Serum follicular
4 e0 q7 X, f* b. Vstimulating hormone and leuteinizing hormone( @8 T. A7 F/ p3 K
concentrations were less than 0.05 mIU/mL
& c7 f1 {( d/ B' y(prepubertal)./ s1 ?; \$ k s& p) Y- ]
The parents were notified about the laboratory
4 w' ~9 P+ {2 `; K1 hresults and were informed that all of the tests were
2 m5 H1 p7 X7 D9 ?) P: ^normal except the testosterone level was high. The8 j& p0 \ V, B
follow-up visit was arranged within a few weeks to( K, a# K# \, O6 U- _
obtain testicular and abdominal sonograms; how-" [& c, Z1 O* U8 h# ]( p! k
ever, the family did not return for 4 months.% @4 T4 Y- h6 d! U$ t9 o2 P
Physical examination at this time revealed that the
- g9 u' H. X4 f2 f5 |child had grown 2.5 cm in 4 months and had gained3 j0 N, U. e5 T! n# A3 F
2 kg of weight. Physical examination remained- }) x4 ~) A6 g3 ^$ t0 D* Q
unchanged. Surprisingly, the pubic hair almost com-
) u* Q# ^- z6 M0 U W: wpletely disappeared except for a few vellous hairs at
; X# @& S6 j! kthe base of the phallus. Testicular volume was still 2
# |& w8 \9 q' E" ^0 k9 [mL, and the size of the penis remained unchanged.
/ c$ I, ?, k% x5 s' \0 [1 RThe mother also said that the boy was no longer hav-, V; k' K3 ]- w
ing frequent erections. ]5 k' |3 U2 Z% g! g* g2 A8 w
Both parents were again questioned about use of
! ^: H. {# Z0 @. i' W( T9 m, e+ ~any ointment/creams that they may have applied to* j. [' A4 _, t9 ~4 U
the child’s skin. This time the father admitted the! X Y1 R( D6 I$ v' h/ }
Topical Testosterone Exposure / Bhowmick et al 5419 Q& L1 a4 h/ Y2 u7 u( y
use of testosterone gel twice daily that he was apply-5 x t' m9 V( a3 c0 _* D8 I& b
ing over his own shoulders, chest, and back area for
8 C. s; |9 [6 }' u; F! E7 K- I+ e) H9 D" Wa year. The father also revealed he was embarrassed
# H9 x$ ?% m9 w) z; `9 ~# Mto disclose that he was using a testosterone gel pre-1 v" M4 m/ C; I' c' h
scribed by his family physician for decreased libido# ~# g0 ]5 S3 B; E2 w# a
secondary to depression.
0 Q- G7 W! g) @! x2 [The child slept in the same bed with parents.
& @ w* ]! R3 ?" J/ CThe father would hug the baby and hold him on his
: C, T& \7 J$ I# N1 Y9 B; {- o$ bchest for a considerable period of time, causing sig-# x# m3 F& M8 j0 f1 x% G0 ?6 g+ d
nificant bare skin contact between baby and father.
$ y/ s3 I' G/ o; K2 |1 h0 R+ WThe father also admitted that after the phone call,) }6 \# N1 S- d$ S6 g7 ?
when he learned the testosterone level in the baby
, g* x8 u) Z; o/ |was high, he then read the product information
/ c3 x, B: K/ \7 Q0 L' Ppacket and concluded that it was most likely the rea-
9 C$ F6 ^; v4 h' Xson for the child’s virilization. At that time, they) R6 d( b+ B; L' p N* O
decided to put the baby in a separate bed, and the
% J# Z' \" _, M4 o5 Vfather was not hugging him with bare skin and had$ d" s6 d& i8 z4 K8 N; x2 r3 F" L, @
been using protective clothing. A repeat testosterone
5 }/ c- r8 S7 k) r6 [& Ktest was ordered, but the family did not go to the
t9 S* X8 p$ }, }% L% @laboratory to obtain the test.
H9 a: T$ d$ e, s8 J' `Discussion# R4 H4 c; k! P9 B% \- m
Precocious puberty in boys is defined as secondary% l% D' R% ^+ h* b" t% }; c
sexual development before 9 years of age.1,4
# H' \- x O; {' b/ w+ C2 f5 `: jPrecocious puberty is termed as central (true) when6 ]6 T# K+ c( m& A6 W# O' V0 y. z
it is caused by the premature activation of hypo-
, V o- P7 C, E1 b* Gthalamic pituitary gonadal axis. CPP is more com-
9 V2 F( u$ Y' T0 Y% Mmon in girls than in boys.1,3 Most boys with CPP
2 q; ^0 Z: |, M, y7 D: R. {% r3 X7 Imay have a central nervous system lesion that is% N% T" X9 i' D- V+ c l* ]
responsible for the early activation of the hypothal-
+ _. o W: K0 z, l: U5 O5 gamic pituitary gonadal axis.1-3 Thus, greater empha-- B4 z, [# N7 l$ Y0 F8 G0 f/ d/ G
sis has been given to neuroradiologic imaging in
3 f, Q+ }. {, D( d4 Jboys with precocious puberty. In addition to viril-
% q z. ]( C$ L, U% q% T5 pization, the clinical hallmark of CPP is the symmet-
) Y- q+ Y; T7 k1 \/ |& |rical testicular growth secondary to stimulation by
4 }/ d5 S: }- ?" |" e" U% U1 pgonadotropins.1,3
: l, ?2 x. K2 f. \6 E! J+ m+ W3 oGonadotropin-independent peripheral preco-
8 k8 E; F9 L0 Q- Ecious puberty in boys also results from inappropriate4 b% B8 ]6 L6 X3 O
androgenic stimulation from either endogenous or
1 a1 q2 O. P" K1 nexogenous sources, nonpituitary gonadotropin stim-5 E7 R$ L* C7 I" ]
ulation, and rare activating mutations.3 Virilizing
% A8 E& ]4 u, q/ L9 f" Z& U9 }% G7 P( ucongenital adrenal hyperplasia producing excessive
8 _ W& P* C5 Hadrenal androgens is a common cause of precocious
4 W( E5 l* L- A6 X, W4 d6 f% ^puberty in boys.3,4
/ P5 w) V6 w! d% v" WThe most common form of congenital adrenal% E# i# U$ r9 v+ U
hyperplasia is the 21-hydroxylase enzyme deficiency.# \/ B" Q% I$ @: }- R$ \/ ^4 g8 n
The 11-β hydroxylase deficiency may also result in# }+ K9 w+ g! x% K1 r7 S: N
excessive adrenal androgen production, and rarely,4 x3 ]) |% S* l% @, y. p5 V f
an adrenal tumor may also cause adrenal androgen* W) E* |; J) K. B" A& ?
excess.1,3/ l- |- ]# h. t; ]0 t
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" @6 \ D$ ^4 c. n/ S: J; F542 Clinical Pediatrics / Vol. 46, No. 6, July 20070 _& e+ f+ o: Y% U6 g, D- Z
A unique entity of male-limited gonadotropin-) ^8 l) q3 O: H5 w3 c' O! C
independent precocious puberty, which is also known
# K9 }% I' P4 P/ c, ?) was testotoxicosis, may cause precocious puberty at a
: P: @5 P1 D1 f2 U9 Rvery young age. The physical findings in these boys. e/ R3 ~8 f- d
with this disorder are full pubertal development,) v2 s% s1 L$ T' Z
including bilateral testicular growth, similar to boys
( n; \5 C' g9 }" b% |2 S- Y7 ?with CPP. The gonadotropin levels in this disorder
* V1 W! Q1 t7 w9 zare suppressed to prepubertal levels and do not show
" E& r6 K& e! H/ h0 H5 y" C* Zpubertal response of gonadotropin after gonadotropin-
7 p- h* g) b2 W! O1 Ireleasing hormone stimulation. This is a sex-linked% T& [) n: W. b- {3 z5 ^0 o
autosomal dominant disorder that affects only, V2 }6 w7 z" d f7 H
males; therefore, other male members of the family9 W% Y. K, o3 h
may have similar precocious puberty.3
- [4 P$ U, I3 V' PIn our patient, physical examination was incon-( ?# z; C" ^2 z. n( B( `
sistent with true precocious puberty since his testi-( t7 d) i! F6 l5 T" [, Y
cles were prepubertal in size. However, testotoxicosis
! S2 T/ }: G9 a5 ^1 x: _. _was in the differential diagnosis because his father
" B- J) `9 f+ p9 H3 W, {+ lstarted puberty somewhat early, and occasionally,
) E& e/ ?! e* P! A+ U/ `* Xtesticular enlargement is not that evident in the
3 L; {* y( e3 {9 H" Zbeginning of this process.1 In the absence of a neg-
( {7 Q; u4 m B$ Zative initial history of androgen exposure, our7 }( h( B4 @. R. ~4 X
biggest concern was virilizing adrenal hyperplasia,
+ W% R4 W7 w6 m7 Jeither 21-hydroxylase deficiency or 11-β hydroxylase
, }: K& J4 `" ^) `5 Xdeficiency. Those diagnoses were excluded by find-
/ j9 `( L4 F- Xing the normal level of adrenal steroids.* E+ H1 ?! a2 q, ^9 _% O# l
The diagnosis of exogenous androgens was strongly7 T: [! s+ k& }2 j: X/ v0 e
suspected in a follow-up visit after 4 months because7 r) s. q4 t8 e: ]/ p2 z
the physical examination revealed the complete disap-
5 H N7 A0 w* ppearance of pubic hair, normal growth velocity, and
0 y9 b$ c0 x A5 N- ?% d% cdecreased erections. The father admitted using a testos-( M- E. A5 F9 F1 ?% ~
terone gel, which he concealed at first visit. He was
, w. F6 Q8 d6 t3 h6 nusing it rather frequently, twice a day. The Physicians’
- C2 r- X4 ?0 G" f5 n4 f6 F: dDesk Reference, or package insert of this product, gel or2 s9 E8 K6 I @/ P; c- K( W. Q @0 a k& y
cream, cautions about dermal testosterone transfer to9 }! O* D2 S" B) S) \6 g9 I4 p. U
unprotected females through direct skin exposure.9 l2 k& R% ~6 T1 u
Serum testosterone level was found to be 2 times the
M" S& y) U8 O9 ybaseline value in those females who were exposed to+ S3 i+ M+ p# D( U7 |
even 15 minutes of direct skin contact with their male6 W" t% j# q8 t' w
partners.6 However, when a shirt covered the applica-
1 }3 g* P0 w$ a% a. r5 l3 Rtion site, this testosterone transfer was prevented.( s! h8 d. P' J! ?' [
Our patient’s testosterone level was 60 ng/mL,
+ S4 t- T- j. m0 Z4 e. J0 j' o' V, Vwhich was clearly high. Some studies suggest that& U+ m! S& J5 { k
dermal conversion of testosterone to dihydrotestos-5 f+ ^- i4 I' n& `
terone, which is a more potent metabolite, is more
5 X! F5 Q: f/ e( B) ]* O3 iactive in young children exposed to testosterone% ~( j, f4 a. a. e7 q Q
exogenously7; however, we did not measure a dihy-4 g. c* C$ H. z% V* ^" Y
drotestosterone level in our patient. In addition to
7 T( @; [+ `/ \' Lvirilization, exposure to exogenous testosterone in
5 F6 t6 N* w' hchildren results in an increase in growth velocity and
7 |5 @* Z8 G# O+ B0 r! F9 `advanced bone age, as seen in our patient.
5 z y" E6 _: Q% c0 N+ `The long-term effect of androgen exposure during
( n, u/ I, Z1 g4 f. Z' Hearly childhood on pubertal development and final+ O# t1 E* C! r6 k* @2 g
adult height are not fully known and always remain1 ]( j0 L& G4 i; [4 ~# o( m* H
a concern. Children treated with short-term testos-
" d% E! W: C' ^terone injection or topical androgen may exhibit some; u0 r8 [( X( m# R
acceleration of the skeletal maturation; however, after4 I7 Z/ H, ?4 X' C
cessation of treatment, the rate of bone maturation. e( u8 R. N4 D0 L5 i F
decelerates and gradually returns to normal.8,9
' J9 O( L6 q: t+ Q5 oThere are conflicting reports and controversy
% o0 C# [2 E: B9 C$ D8 u, B5 bover the effect of early androgen exposure on adult8 ~3 @3 X- J5 C# q% _. S: [
penile length.10,11 Some reports suggest subnormal
! } U. D8 i* o0 D2 Fadult penile length, apparently because of downreg-
( e% p9 b' |! `$ _: i# h! w' Wulation of androgen receptor number.10,12 However,. l# m# e& T% e; [) J
Sutherland et al13 did not find a correlation between! @' Y2 A$ |! ]: _7 n
childhood testosterone exposure and reduced adult. x# ^. I) S% v# `
penile length in clinical studies.$ p: w. ~7 z* M1 G" n8 P$ b1 v' T
Nonetheless, we do not believe our patient is
' H8 e% O0 b5 W; s: K0 z- Z- Q9 ]! xgoing to experience any of the untoward effects from
8 N4 y/ u+ ]; T% a1 Qtestosterone exposure as mentioned earlier because# i, }- ]! m* J0 ^4 s! ?) T
the exposure was not for a prolonged period of time.
' M1 ~* F+ y$ C f8 BAlthough the bone age was advanced at the time of
( R' Y/ g+ N8 l- n3 I" g: W, Hdiagnosis, the child had a normal growth velocity at; d$ ]7 G1 l2 D1 R! C3 n( \
the follow-up visit. It is hoped that his final adult
3 L9 F* f3 i. b) F q' ? Mheight will not be affected." s B7 ]/ |' ?1 z5 N: M
Although rarely reported, the widespread avail-
$ n' ^, e4 H' I# Sability of androgen products in our society may
1 E8 \* H" X- q/ }, uindeed cause more virilization in male or female4 e5 ~, l+ g/ m$ u) m# z
children than one would realize. Exposure to andro-
4 s* l' T- f5 m5 Kgen products must be considered and specific ques-3 G( Q8 _" D. p" b
tioning about the use of a testosterone product or
: Y5 u; D7 k3 I' ugel should be asked of the family members during( m* @: K3 p1 w/ x3 E( D* B
the evaluation of any children who present with vir-3 ~! ^ q, C: b7 U# N' [$ t ]- c
ilization or peripheral precocious puberty. The diag-: E1 s8 l( h) z) K: X6 G
nosis can be established by just a few tests and by
" y( U( C! f2 Y) Uappropriate history. The inability to obtain such a8 g' H% b" O+ d% _6 O/ j4 q# x
history, or failure to ask the specific questions, may
5 E7 ]) F2 n* N( D- Uresult in extensive, unnecessary, and expensive
8 b4 `. }* D' H3 L1 V0 Sinvestigation. The primary care physician should be
1 P3 C1 j8 V4 j; o1 caware of this fact, because most of these children
2 k3 }5 {! }* U% Emay initially present in their practice. The Physicians’ k# t2 r" s, ?. H a, b
Desk Reference and package insert should also put a4 H# u4 i! ^) b
warning about the virilizing effect on a male or
$ H$ m) U+ C ~5 ]" q' v/ wfemale child who might come in contact with some-
( A/ u4 b, }' L1 eone using any of these products.
* L. O; K( k9 W9 Z3 b/ u! r' Z: KReferences
% a5 a! y0 |% J! t- t( Y+ T& p$ n7 m1. Styne DM. The testes: disorder of sexual differentiation# \9 s9 p0 X- A% Z. n
and puberty in the male. In: Sperling MA, ed. Pediatric. {3 e! P6 t1 O- @5 f
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
6 C2 Z( g- C2 T1 v! J3 K2002: 565-628. \( D! f% s% ]% }0 a
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
7 v8 }) ^/ y8 ~, Jpuberty in children with tumours of the suprasellar pineal
* s9 n9 I1 a: Q0 \2 A. Zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
+ ~8 g; S; T# T. J5 JTopical Testosterone Exposure / Bhowmick et al 543
! q/ z( p- S# A2 T5 J; {areas: organic central precocious puberty. Acta Paediatr.
" `8 K6 y3 h1 o. P; S% W6 h2001;90:751-756.
* n% T% w/ {2 ~0 w& }5 E3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.6 Y$ j2 O% f p0 c
Pediatric Endocrinology. 4th ed. New York, NY: Marcel F9 g9 O$ |* F# W; T C5 o
Dekker Inc; 2003:211-238.2 r& j) C) k: I
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
' n/ Z4 K, m6 g9 a; Udevelopment in a two-year-old boy induced by topical* Z7 `5 o: {8 F6 `4 }
exposure to testosterone. Pediatrics. 1999;104:e23." x3 R. o7 x* g: G5 F4 b% S
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
7 X& v( o5 t; ?( OSkeletal Development of the Hand and Wrist. 2nd ed.
. ?' c9 \5 _ B! x. j0 B5 Q" ZStanford, CA: Stanford University Press; 1959.2 x1 l9 T' g N2 C
6. Physicians’ Desk Reference. Androgel 1% testosterone,9 S1 b/ ?, b) a. X9 X- } z
Unimed Pharmaceutical Inc. Montvale, NJ: Medical2 ~: J$ {, G8 {4 ^: P/ J8 u
Economics Company, Inc; 2004:3239-3241.
$ r) Q' i& k; V) j* [0 y, P2 e7. Klugo RC, Cerny JC. Response of micropenis to topical
/ W# J; v% C) y: j p( ]. c% o+ ttestosterone and gonadotropin. J Urol. 1978;119:$ v2 r) G) Q% C. n# [ \8 _0 b4 F
667-668.
c+ y& s7 e5 l' U; Z8. Guthrie RD, Smith DW, Graham CB. Testosterone
2 |1 K( q8 T$ X I- j) {treatment for micropenis during early childhood. J Pediatr.
: g4 ?0 C' o5 s8 d, a/ n; }1973;83:247-252. m3 y& [! r& Z
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
+ j7 S3 W& X# D+ utherapy for penile growth. Urol. 1975;6:708-710.1 Q; e* M8 @5 a5 ]3 b+ _) _1 t
10. Husmann DA, Cain MP. Microphallus: eventual phallic W; l+ I- c& m- y8 l9 g% d
size is dependent on the timing of androgen administra-: |8 {% l. H% d8 e% C. v4 q& U' a% ~
tion. J Urol. 1994;152:734-739.
* q R6 [3 u4 M: l* ~. O- e) r, t8 y11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
6 F. {0 _0 j7 ndoes early treatment with testosterone do more harm" i4 d2 I q+ h+ Y$ m
than good? J Urol. 1995;154:825-829.9 G$ y% w0 P9 ?0 W
12. Takane KK, George FW, Wilson JD. Androgen receptor/ y1 \* K& W. o
of rat penis is down-regulated by androgen. Am J Physiol.
& V, ]. y$ u3 B0 n: e e$ d3 q1990;258:E46-E50.9 N$ S( e5 B9 w* o0 [1 n
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect5 U( B* a$ _: n, }" _( ~
of prepubertal androgen exposure on adult penile. X5 Q2 s' [" L- ?
length. J Urol. 1996;156:783-787. |
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