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is a significant concern for physicians. Central
( i, S5 h6 `9 G$ ]' F9 kprecocious puberty (CPP), which is mediated; }1 ] |! C A
through the hypothalamic pituitary gonadal axis, has5 `& e4 V7 s4 E; M x2 X
a higher incidence of organic central nervous system y# o" a. o0 d4 Z# o2 ?$ f
lesions in boys.1,2 Virilization in boys, as manifested
8 f- d4 V3 u. M+ [by enlargement of the penis, development of pubic! |( N1 `& B, v- v; S. \
hair, and facial acne without enlargement of testi-) p& \4 h- p }# X$ O
cles, suggests peripheral or pseudopuberty.1-3 We
3 J! g) P. }2 F* B/ Preport a 16-month-old boy who presented with the4 M* h L5 V. y' S3 F5 n8 v7 ?( K* R' x
enlargement of the phallus and pubic hair develop-
+ x' n4 F& p% v3 M4 p( r: a: o7 tment without testicular enlargement, which was due
, k u# S ~: x" \$ K: Hto the unintentional exposure to androgen gel used by
) Y! }8 ^- x8 W2 G: b7 Dthe father. The family initially concealed this infor-
5 o* N, S+ u6 o3 P$ ?/ Dmation, resulting in an extensive work-up for this; O ?) |6 X) e. e% j( z5 v* j
child. Given the widespread and easy availability of0 W. i0 y3 a' k& Q
testosterone gel and cream, we believe this is proba-
9 A: B& [& m o% T+ Gbly more common than the rare case report in the% {& F0 s/ `& @2 S' q6 N
literature.4& `5 E% [( x, V8 W. D1 R
Patient Report0 d! O9 F' @' V) W
A 16-month-old white child was referred to the( `4 R" E0 x1 Q3 ]3 ]9 g% h
endocrine clinic by his pediatrician with the concern
5 }1 T3 h2 u. ?% qof early sexual development. His mother noticed8 s+ d2 P, l3 \" c. y4 U
light colored pubic hair development when he was
2 S) E% g- \: q: _From the 1Division of Pediatric Endocrinology, 2University of
8 D. q" U8 {+ f7 U- f$ O) W7 SSouth Alabama Medical Center, Mobile, Alabama.2 D/ P' e5 F9 s/ \% a" C: P
Address correspondence to: Samar K. Bhowmick, MD, FACE,& O0 J$ n' C6 ]8 V9 q* m
Professor of Pediatrics, University of South Alabama, College of. @4 i% o4 T2 B% W, O
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 e& l. g# m4 v* {2 {( me-mail: [email protected].4 A+ @) @$ j- X: K+ r% j
about 6 to 7 months old, which progressively became! e; c; a. N8 f3 s5 w1 L3 I4 E
darker. She was also concerned about the enlarge-
3 l1 A+ ^6 Y! F' r0 u, Mment of his penis and frequent erections. The child" c% G4 X6 O' J# q- A' H. u" y! _
was the product of a full-term normal delivery, with
5 N# ^( A5 }2 f- E( S. Ka birth weight of 7 lb 14 oz, and birth length of! ?; n0 Z% q, g) `( |! W! p
20 inches. He was breast-fed throughout the first year
; m" }0 n7 z- {/ T7 L' nof life and was still receiving breast milk along with
2 w1 ~. _+ j4 ]$ Bsolid food. He had no hospitalizations or surgery,
8 c; a& b: t8 n: @and his psychosocial and psychomotor development
! O8 U7 h, g% `+ Kwas age appropriate.
7 Q# ^( I1 H: M8 KThe family history was remarkable for the father,/ G3 g/ f$ A2 H- F3 s, S* L+ o
who was diagnosed with hypothyroidism at age 16,
1 b6 O; u L- S% p7 ^which was treated with thyroxine. The father’s3 @9 C2 Z4 s% H7 s
height was 6 feet, and he went through a somewhat8 d3 Z# v1 F4 j7 y4 f
early puberty and had stopped growing by age 14.& b, g, Y# g" U/ F t! b8 W
The father denied taking any other medication. The. u% g& W# g1 H8 V6 l4 [4 y
child’s mother was in good health. Her menarche" P5 r7 I: D/ b2 J4 O: Q
was at 11 years of age, and her height was at 5 feet
1 V) S& i9 u& a5 inches. There was no other family history of pre-/ Q: G1 {# b( c- S3 A0 r3 m. B# f8 H
cocious sexual development in the first-degree rela-
1 Y, |$ C7 z2 h! {/ {+ y. h5 j! X& etives. There were no siblings.% ~& g3 ?; |1 A
Physical Examination& f$ _ S. K- G* P, a# K. T# C2 G! {8 H
The physical examination revealed a very active,
& m6 Z0 y5 v1 x% L% b! Iplayful, and healthy boy. The vital signs documented+ _6 O) }; X0 O' F; s. x% ]' Q% l
a blood pressure of 85/50 mm Hg, his length was' `, C1 @7 U Q" p4 t. {
90 cm (>97th percentile), and his weight was 14.4 kg/ S8 W9 I6 h$ \2 U
(also >97th percentile). The observed yearly growth
2 g8 G3 p3 C& _. Cvelocity was 30 cm (12 inches). The examination of
5 ]: g6 ` f; {7 z6 Jthe neck revealed no thyroid enlargement.
- k" [& k- l: b9 h& }The genitourinary examination was remarkable for3 j& H! {. I: X4 t& j
enlargement of the penis, with a stretched length of9 {6 j0 u5 y; l# Q$ c, t3 {
8 cm and a width of 2 cm. The glans penis was very well
! V; V$ H" X+ [- x$ {: o. hdeveloped. The pubic hair was Tanner II, mostly around
; i& H" t) b8 k540* v' f& e6 r) L7 v: ~4 V- x2 j
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from/ ]+ C. A; c. s& S7 `* B% s: O
the base of the phallus and was dark and curled. The
, o" q1 L/ f$ Ftesticular volume was prepubertal at 2 mL each.
; R; `! ?2 {. a; H; w& p% Y |# \% xThe skin was moist and smooth and somewhat9 i( B8 C1 ?/ F9 w8 d6 |
oily. No axillary hair was noted. There were no* t' b* E8 q5 p% q( v% H* ]
abnormal skin pigmentations or café-au-lait spots.
, D, L4 z) \: l7 ?6 @ K( {Neurologic evaluation showed deep tendon reflex 2+
; W ?2 F! ~8 }. H5 fbilateral and symmetrical. There was no suggestion. ~/ Y5 @3 l7 {6 i
of papilledema.
2 f. t0 H" n, ~' f& Q# a) n: mLaboratory Evaluation+ i$ x; v! s2 K( g( [
The bone age was consistent with 28 months by
, M& i1 \# c# e3 g5 t) k2 N" H2 vusing the standard of Greulich and Pyle at a chrono-
4 E6 y. N; g& Dlogic age of 16 months (advanced).5 Chromosomal2 _/ E3 F$ Z' W3 `* o- P
karyotype was 46XY. The thyroid function test
& o% W0 C* D2 e4 \9 M2 Q! \showed a free T4 of 1.69 ng/dL, and thyroid stimu-* R3 ?0 T7 [ _2 _; A' X& m. x: U
lating hormone level was 1.3 µIU/mL (both normal).
4 }5 H7 ~8 \$ g" M& t" [The concentrations of serum electrolytes, blood" C% j2 G8 T3 |/ Y, Q
urea nitrogen, creatinine, and calcium all were. t8 q# V9 a4 ~3 _
within normal range for his age. The concentration; x, ~+ z. n4 X" K! q, ?
of serum 17-hydroxyprogesterone was 16 ng/dL$ P4 w, H$ v( U" ?5 T. T
(normal, 3 to 90 ng/dL), androstenedione was 20/ N* I$ j/ H$ N( l. } v$ R7 P5 ^
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-( y; Z) H: q' s4 x5 D& l
terone was 38 ng/dL (normal, 50 to 760 ng/dL),- D, U2 i$ S' N% u" J3 Z% n
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
9 Y, |0 L* [4 E6 ^49ng/dL), 11-desoxycortisol (specific compound S)0 I- Y ?+ |4 ^% q8 E2 h4 j! Q, Z5 N) o
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
1 O$ ]- l! l! ]# [tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
; W, O b! @" s6 \5 itestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
: N: U8 h p& Dand β-human chorionic gonadotropin was less than5 T: J0 W& u, `9 k6 O
5 mIU/mL (normal <5 mIU/mL). Serum follicular
) `- w9 J5 V' T0 l9 @+ Bstimulating hormone and leuteinizing hormone6 _" _6 K$ x/ ^! y& g5 h
concentrations were less than 0.05 mIU/mL1 ~- y n1 K/ H3 \ M/ O6 t
(prepubertal).( K/ k$ ^/ c1 f% p/ H6 F' X& h
The parents were notified about the laboratory
* M0 c3 f' B( z. S1 O9 A' xresults and were informed that all of the tests were
u! Q) A: ]' ^1 ]. Inormal except the testosterone level was high. The4 O. e: [: g2 V4 b! T: M" a5 O
follow-up visit was arranged within a few weeks to! F8 g$ D7 }" t
obtain testicular and abdominal sonograms; how-$ }3 n. j6 B7 P! E( @8 G
ever, the family did not return for 4 months.
) i; z2 Z1 u- |1 V. y R( v+ d2 _0 gPhysical examination at this time revealed that the4 N2 `: E, T4 L
child had grown 2.5 cm in 4 months and had gained3 E4 N2 _$ W8 g% \
2 kg of weight. Physical examination remained
) Q- g) P" c0 ?- r, aunchanged. Surprisingly, the pubic hair almost com-
5 |$ `3 \' P5 G, {3 _8 ]+ n9 D$ ?pletely disappeared except for a few vellous hairs at5 `0 U- @* V+ ~! g- o- F2 N* O
the base of the phallus. Testicular volume was still 21 A. i8 _; F0 ^+ O" d( r7 X7 l$ b
mL, and the size of the penis remained unchanged.
4 l( `6 a& n+ ^1 X7 IThe mother also said that the boy was no longer hav-
+ {) |; [0 Y' c5 C" ^ing frequent erections.+ J3 R5 ]1 P) p4 r- x9 g0 \
Both parents were again questioned about use of
) {8 K+ V7 U3 q2 X9 w2 Eany ointment/creams that they may have applied to
! l2 p9 {" l# \) Pthe child’s skin. This time the father admitted the
7 j) H0 @: o' TTopical Testosterone Exposure / Bhowmick et al 541
1 Z6 Q. X. k4 Y b [7 N5 Ruse of testosterone gel twice daily that he was apply-! E* W: k( E8 C& g1 g- M7 \
ing over his own shoulders, chest, and back area for
# N1 g$ d# N- G* w, N La year. The father also revealed he was embarrassed
9 L" G, Q2 {( a2 oto disclose that he was using a testosterone gel pre-5 E3 ^5 W/ R7 z7 f) H5 `. R
scribed by his family physician for decreased libido
3 S+ E0 N I9 a( e1 o7 I1 T5 Ysecondary to depression.
0 {, |$ M( w$ }- ZThe child slept in the same bed with parents.
6 v/ y2 `/ @( T1 a1 xThe father would hug the baby and hold him on his
0 U. N8 a2 P5 Q7 fchest for a considerable period of time, causing sig-3 g& ?! ] F$ m) T: ~, v
nificant bare skin contact between baby and father.3 n8 d5 o+ _- `& d* D
The father also admitted that after the phone call,; E' R2 ` d7 U0 S1 ?5 e3 ?( A
when he learned the testosterone level in the baby
" i% {3 n& D: Z' i* b# E* Y: ywas high, he then read the product information
s+ J# v/ Q# ]packet and concluded that it was most likely the rea-
/ `5 G" b% e0 O$ @2 m/ Uson for the child’s virilization. At that time, they
) {" ^6 L' f3 O) O( v. bdecided to put the baby in a separate bed, and the
' ^, A4 [+ m- }: d2 E( F1 zfather was not hugging him with bare skin and had9 a% Y+ g/ L& w& R$ g" t
been using protective clothing. A repeat testosterone
1 e7 x' n; C# Z, x$ Ztest was ordered, but the family did not go to the. z3 B6 j# Y4 m& d
laboratory to obtain the test.( @* ?/ Q5 X6 ?+ I2 b. O9 z
Discussion
& L) G$ ^- ]1 h* G# c' \0 |6 g) nPrecocious puberty in boys is defined as secondary
! i3 K% s# n6 Hsexual development before 9 years of age.1,4; Y Y4 Y) o- p J
Precocious puberty is termed as central (true) when
; M. W- N. d6 pit is caused by the premature activation of hypo-
_: Q, q- F' U M# _thalamic pituitary gonadal axis. CPP is more com-
! S! Y6 X# r6 _7 Pmon in girls than in boys.1,3 Most boys with CPP
5 {: r1 Y/ W; e+ e8 }% }may have a central nervous system lesion that is
9 ?: {' m7 j4 Q* |responsible for the early activation of the hypothal-6 z* _# q: Q- g3 q6 R7 J
amic pituitary gonadal axis.1-3 Thus, greater empha-
8 g4 m0 `( _9 ssis has been given to neuroradiologic imaging in
* W4 k+ q1 \* Z% `* pboys with precocious puberty. In addition to viril-
7 D! c. R3 [9 u% O. e" a3 Bization, the clinical hallmark of CPP is the symmet-# e+ D0 E7 w/ O5 c) ~- Q$ q
rical testicular growth secondary to stimulation by0 e/ D9 t$ w9 p1 D# \
gonadotropins.1,38 W3 h* H7 q4 N: F9 h
Gonadotropin-independent peripheral preco-; x$ p# u- {8 s# m
cious puberty in boys also results from inappropriate
7 |# @# {. U; @' u0 Z5 r3 wandrogenic stimulation from either endogenous or' b) |+ T# ? x4 v/ @, V
exogenous sources, nonpituitary gonadotropin stim-
& Q2 M }; R9 @3 g- j& _ulation, and rare activating mutations.3 Virilizing
6 ^, x( W) ^ ~, Fcongenital adrenal hyperplasia producing excessive$ X" I- m1 l( G9 g
adrenal androgens is a common cause of precocious
, l l- M7 ]& ]2 ypuberty in boys.3,4
) b, I$ D e* O2 c7 e. \/ i; w" B$ YThe most common form of congenital adrenal
- `0 ^: ?* }& c4 `* ?: v Phyperplasia is the 21-hydroxylase enzyme deficiency.
: P, O& z2 b! E1 I! k% ]6 s# MThe 11-β hydroxylase deficiency may also result in
, L$ v* Y* }# vexcessive adrenal androgen production, and rarely,
' N; }! B' U# I9 O$ [4 {an adrenal tumor may also cause adrenal androgen
M. B- c9 ^! v \2 B+ Z( g$ Zexcess.1,3
2 _! ~3 n; ?7 I( S. Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& N( J7 b9 d9 M5 z. M+ t" f542 Clinical Pediatrics / Vol. 46, No. 6, July 2007( g" @ @' _2 h
A unique entity of male-limited gonadotropin-7 ?: N- w% e. v* o
independent precocious puberty, which is also known+ N' G9 s) P. l6 Y" r# D
as testotoxicosis, may cause precocious puberty at a
* }" ]4 e1 n3 s0 o zvery young age. The physical findings in these boys8 F7 N# g. }+ L/ q, b; F. o
with this disorder are full pubertal development,; L9 i" d5 l: @( D
including bilateral testicular growth, similar to boys
5 h& _8 Q- _" Wwith CPP. The gonadotropin levels in this disorder0 T7 K& Q; d, j" y2 i3 r
are suppressed to prepubertal levels and do not show
) J- x2 z4 l- ]7 i8 W& Ppubertal response of gonadotropin after gonadotropin-
O! Q u! I* \5 Qreleasing hormone stimulation. This is a sex-linked
) i: X% O+ Z5 S' ]; H4 U9 @ K" Kautosomal dominant disorder that affects only
. c' U* x: s4 f) c/ P/ U) G. rmales; therefore, other male members of the family1 w/ X& U3 r8 g$ y' I e
may have similar precocious puberty.33 V4 X1 J% I# R
In our patient, physical examination was incon-1 \8 i/ Q5 @9 L+ q+ j# `/ e4 L
sistent with true precocious puberty since his testi-5 X( _5 _; A: ?6 i8 L
cles were prepubertal in size. However, testotoxicosis
, Q/ q* i+ m5 U$ b7 mwas in the differential diagnosis because his father6 q& O, \5 r( M S/ _3 x4 C
started puberty somewhat early, and occasionally,
2 K" B( ~/ w- J5 Mtesticular enlargement is not that evident in the
4 P$ H5 E( Q d- T3 U/ Tbeginning of this process.1 In the absence of a neg-! x3 d- T0 S: Y2 T3 k% S- N
ative initial history of androgen exposure, our
/ t2 S: k" ?1 ~1 P/ o0 Obiggest concern was virilizing adrenal hyperplasia,* b8 O$ t- D" V9 G+ X: e
either 21-hydroxylase deficiency or 11-β hydroxylase
9 q- u" a- k8 U4 A( _/ H# xdeficiency. Those diagnoses were excluded by find-& \# G4 @3 [& P0 r/ @# b
ing the normal level of adrenal steroids.9 q: c3 J1 d( T# ?* j, c
The diagnosis of exogenous androgens was strongly
- j; i, Y3 V0 o5 W5 esuspected in a follow-up visit after 4 months because
# ^5 ]/ E" a% C3 athe physical examination revealed the complete disap-6 b+ R1 B& G+ V
pearance of pubic hair, normal growth velocity, and
# p% T D( z& {: J" d- ~decreased erections. The father admitted using a testos-
+ o" b+ |: @6 G* o: @, Zterone gel, which he concealed at first visit. He was
* s8 j; w0 J, b% Fusing it rather frequently, twice a day. The Physicians’
7 x ]8 T7 r4 w2 g# D8 H& ?Desk Reference, or package insert of this product, gel or2 x0 r' d7 C% n5 R) j- u9 c
cream, cautions about dermal testosterone transfer to
% l- _; H% N2 s: `. Uunprotected females through direct skin exposure.1 n9 F0 C& s* N
Serum testosterone level was found to be 2 times the
" m' y! y3 X* v# |* Pbaseline value in those females who were exposed to
* M- S/ ^* v' D3 o5 Z8 Y* {) y8 O& Oeven 15 minutes of direct skin contact with their male. D% s% [$ C) ? ^; q% f
partners.6 However, when a shirt covered the applica-5 _" m+ D% ` i {
tion site, this testosterone transfer was prevented.5 m# r: X1 O( X# X! @5 O
Our patient’s testosterone level was 60 ng/mL,7 P# u2 W$ p9 o6 w; M
which was clearly high. Some studies suggest that
$ \1 l% f1 A& ]1 e$ b3 edermal conversion of testosterone to dihydrotestos-
2 @ F, T' U. A: U9 aterone, which is a more potent metabolite, is more* f7 G2 \9 U, k! ]5 f8 r
active in young children exposed to testosterone1 u3 v% ?1 ?- C, u$ C' {% h5 e
exogenously7; however, we did not measure a dihy-
5 H2 t4 w# v( Y, g7 G' M& }drotestosterone level in our patient. In addition to
4 }0 _! J' j M; E7 avirilization, exposure to exogenous testosterone in
$ d6 R; U" t4 y$ y+ e- D7 ?children results in an increase in growth velocity and
! _# n0 p. r; aadvanced bone age, as seen in our patient.
5 F- P3 A0 y# _+ N# VThe long-term effect of androgen exposure during
& P, e9 [; v4 w) M' P. V( u( O3 nearly childhood on pubertal development and final
& ]: F6 J: R: g" J$ R# o+ ~adult height are not fully known and always remain- h9 c( |$ e2 p
a concern. Children treated with short-term testos-
4 b9 n3 O _' Mterone injection or topical androgen may exhibit some
0 Z, H: }; `0 }/ w6 i% wacceleration of the skeletal maturation; however, after) q2 d9 A4 m$ ?# B: `3 C
cessation of treatment, the rate of bone maturation( y1 N- o3 z6 c* e8 ^% V0 j
decelerates and gradually returns to normal.8,9
& K8 ~% m( Q. ^5 M" p$ \) aThere are conflicting reports and controversy4 l! N9 y0 Y2 ^/ \3 V6 s- Y8 Q
over the effect of early androgen exposure on adult6 N2 M3 r5 X3 [+ Y/ Y8 z+ _% q, r& T
penile length.10,11 Some reports suggest subnormal g) ]* i5 r/ ^
adult penile length, apparently because of downreg-4 A$ f5 D5 [) w7 I# x9 a
ulation of androgen receptor number.10,12 However,
! A w2 @1 s" V- s) x2 P) S! [Sutherland et al13 did not find a correlation between6 ?# @5 ~1 ]1 H- c$ |
childhood testosterone exposure and reduced adult
, p3 r; b2 w8 G# Q! npenile length in clinical studies.! ^" p% a! a% P5 g: l: o' s
Nonetheless, we do not believe our patient is0 e5 n' T$ w8 I. m1 m3 v" O8 ~
going to experience any of the untoward effects from
( L# q! f, Y' k# o5 e7 H' l' \& W: \testosterone exposure as mentioned earlier because& |/ D" a9 ~9 _- x+ M# p
the exposure was not for a prolonged period of time.1 b* D8 V7 q% V0 J9 S5 n
Although the bone age was advanced at the time of
! _5 B7 w- Z: R9 ~9 q3 jdiagnosis, the child had a normal growth velocity at
7 F ^% }% i7 n9 ythe follow-up visit. It is hoped that his final adult+ A1 j r) {$ D y& M
height will not be affected.+ p& W4 d* `) {1 e* J3 d9 [ r
Although rarely reported, the widespread avail-3 o1 q. h( Y) l! N; h6 U' e9 g! ]
ability of androgen products in our society may
+ g4 k7 V8 ~1 h0 h9 ?9 sindeed cause more virilization in male or female
) K, w8 U1 e: tchildren than one would realize. Exposure to andro-8 I; J9 ^% {; T2 v. {' ?. }* r0 V p4 n/ \
gen products must be considered and specific ques-
" E. V7 F! z# K l1 E5 ktioning about the use of a testosterone product or
( `% T6 {: u+ } ~! Ngel should be asked of the family members during7 q$ y; U- V( r- L. S% r2 d
the evaluation of any children who present with vir-
& }! S$ S! e& n7 o' M' _/ P% }ilization or peripheral precocious puberty. The diag-
# T$ _9 d* [" E& W+ vnosis can be established by just a few tests and by
( \; ?" n/ X1 s% p5 E& O7 ^appropriate history. The inability to obtain such a
/ O3 A* ?" r+ Ihistory, or failure to ask the specific questions, may5 F/ [ H: k' t. _. h5 O, L
result in extensive, unnecessary, and expensive
8 u* A& e4 N; u/ |5 x6 ?' b8 x! Ginvestigation. The primary care physician should be
; m$ K( E8 ~$ Xaware of this fact, because most of these children/ G/ ^3 f9 {# ^2 T. J( v+ l
may initially present in their practice. The Physicians’' `( {4 J' m. O A5 m0 X
Desk Reference and package insert should also put a
b% a% p3 b4 \; Dwarning about the virilizing effect on a male or
; J8 ^4 K; ?* f zfemale child who might come in contact with some- d) a8 E$ x4 y: n I9 Y
one using any of these products.& Y: l4 t/ ?+ i q* e r
References2 h# p+ W! E2 a$ X4 M, G
1. Styne DM. The testes: disorder of sexual differentiation0 o% m* z* `) [- w( i& I9 d
and puberty in the male. In: Sperling MA, ed. Pediatric
$ C" q5 q0 ^' I6 _Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 j8 d/ w' M5 w0 \" C2002: 565-628.
7 F9 Q. d, Y: @4 `8 V2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
5 l6 |3 D' n) T9 A1 N5 Ppuberty in children with tumours of the suprasellar pineal
* C+ B0 b7 U; [' bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* l- Y" ^! p+ y" P
Topical Testosterone Exposure / Bhowmick et al 543$ j1 A( |% c( d
areas: organic central precocious puberty. Acta Paediatr.) M( ^* D) z/ W v; E; o/ }$ p- y
2001;90:751-756.' T: U1 a: p7 W# v s: x9 q
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed." ?% }" t2 M0 p3 k( B
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
9 {% T+ i0 r4 P. x' oDekker Inc; 2003:211-238.
* S4 g; ]' {7 v8 N' C& d4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
+ B6 ~8 g+ q; U& J! xdevelopment in a two-year-old boy induced by topical, r, R; J; v" z9 Y
exposure to testosterone. Pediatrics. 1999;104:e23.
$ P7 l9 s& E, f. p5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
9 l' N9 N% I E8 ?" [0 HSkeletal Development of the Hand and Wrist. 2nd ed.
9 e3 w" S0 E, x! E" x+ F! Y# W- `Stanford, CA: Stanford University Press; 1959.$ J" ]3 ?; y' O9 y$ F; s7 g+ d
6. Physicians’ Desk Reference. Androgel 1% testosterone,
$ n! H6 t) K& e' M* D1 qUnimed Pharmaceutical Inc. Montvale, NJ: Medical$ \+ C) Y0 i0 L, J. W
Economics Company, Inc; 2004:3239-3241.
2 `/ {; K# c8 c, X7. Klugo RC, Cerny JC. Response of micropenis to topical
I: s% z9 h! J6 Atestosterone and gonadotropin. J Urol. 1978;119:
$ K' h# p* M/ e+ O+ y8 |& u667-668.
& `' a1 e) G6 ~0 P7 X2 r- i/ b8. Guthrie RD, Smith DW, Graham CB. Testosterone
: B( q+ T, w- j0 ^* d+ Ctreatment for micropenis during early childhood. J Pediatr.
8 r/ k7 H* I6 _" x1973;83:247-252.! G! D4 u* ]6 W" r7 k! f% }
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
2 w+ \, O0 F! @9 [! Utherapy for penile growth. Urol. 1975;6:708-710.' }8 f1 A$ P* _! O0 r
10. Husmann DA, Cain MP. Microphallus: eventual phallic' n1 L* C, A1 T2 \ A: ^
size is dependent on the timing of androgen administra-
$ K. b6 T3 V, [tion. J Urol. 1994;152:734-739.0 X$ [) W6 l/ E# e @1 {
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:6 Z4 U4 t3 ^4 r6 B
does early treatment with testosterone do more harm
% }4 J2 J0 n4 a1 O6 ^5 R* v5 d6 Lthan good? J Urol. 1995;154:825-829.6 d# s7 F6 z0 y& v! i9 L: u
12. Takane KK, George FW, Wilson JD. Androgen receptor) b4 |. o/ n; T, M& D; u7 V8 f
of rat penis is down-regulated by androgen. Am J Physiol.
& K; D- R% v1 o% b( N1990;258:E46-E50. g p& ]7 o+ R, _
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
/ k; A# D2 E7 Yof prepubertal androgen exposure on adult penile
7 T( `7 k7 _' Tlength. J Urol. 1996;156:783-787. |
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