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is a significant concern for physicians. Central5 [+ M8 s* r! p0 v
precocious puberty (CPP), which is mediated4 O8 d0 g0 @! E, ~; |+ G
through the hypothalamic pituitary gonadal axis, has. d0 i! n2 m! Q! g: C3 L' H- |$ u
a higher incidence of organic central nervous system
" s- S8 W5 L; f( U( F9 M* W5 ]2 ?* hlesions in boys.1,2 Virilization in boys, as manifested9 h# R, g) v; w$ L+ a* J2 s
by enlargement of the penis, development of pubic
5 w7 i: X' W& M8 C3 E/ s! c4 Uhair, and facial acne without enlargement of testi-
' v; ]- b2 U" r) Zcles, suggests peripheral or pseudopuberty.1-3 We2 w# V m- z8 X
report a 16-month-old boy who presented with the3 p% W/ N' H6 k$ {/ ^4 P" u# O! Z
enlargement of the phallus and pubic hair develop-
8 z0 ]4 h9 ^" A% X: z7 v" Iment without testicular enlargement, which was due+ \- Y/ i0 @& |, e& X/ t7 r
to the unintentional exposure to androgen gel used by( u) \# ?0 d8 a B: w3 ^
the father. The family initially concealed this infor-
7 `6 m) S$ m+ H3 O. Mmation, resulting in an extensive work-up for this
; M+ o) N! F# Q; jchild. Given the widespread and easy availability of. Y& W4 @, i8 `& Q
testosterone gel and cream, we believe this is proba-
E# U+ [% O1 v6 _6 z3 I- Ibly more common than the rare case report in the
7 e$ O6 e# [4 j5 iliterature.47 p% Q5 R- G: j
Patient Report0 ?) y+ D5 Z( l$ g4 G5 C" s
A 16-month-old white child was referred to the; k/ e0 t9 @( u7 U- W( u
endocrine clinic by his pediatrician with the concern) g' Q6 [$ x) ^
of early sexual development. His mother noticed3 w4 h' H4 W& \4 m; O6 i
light colored pubic hair development when he was
0 J; L5 O) k6 c5 f* J1 p3 CFrom the 1Division of Pediatric Endocrinology, 2University of
6 z; `/ O3 Z% k# z6 v9 ]2 r! hSouth Alabama Medical Center, Mobile, Alabama.
- ?; w. K$ ]: W- |& U1 A0 j5 P5 _Address correspondence to: Samar K. Bhowmick, MD, FACE,5 m' U K/ |7 |% }
Professor of Pediatrics, University of South Alabama, College of
% o4 r" o" j1 W) uMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( T* ]6 b; T% _$ m) ^7 l6 v
e-mail: [email protected].
/ ]: T. Q9 d5 |; i/ Dabout 6 to 7 months old, which progressively became9 v" y0 w5 {* Y0 G- l
darker. She was also concerned about the enlarge-) a ]3 J4 ?' U! d3 Q T
ment of his penis and frequent erections. The child" C1 b3 M% A. S
was the product of a full-term normal delivery, with
0 n% Z! O" X( |% }+ |! F/ w5 Ua birth weight of 7 lb 14 oz, and birth length of
) x& Q `' {2 X7 W! H( ?7 Z20 inches. He was breast-fed throughout the first year6 h- n9 l# D1 { L
of life and was still receiving breast milk along with! ?# {" q8 e& \7 G5 M, C/ \
solid food. He had no hospitalizations or surgery,
' w0 o3 p) c& U+ s) Zand his psychosocial and psychomotor development
3 h, R: r- l. O& w( qwas age appropriate.
, X- u: U1 v# C7 d sThe family history was remarkable for the father,9 O' D7 E) n9 w6 C# b" t5 n2 i
who was diagnosed with hypothyroidism at age 16,
9 ]. v4 Q, P6 Z: z1 V2 X* Lwhich was treated with thyroxine. The father’s ~ @( F* e! \
height was 6 feet, and he went through a somewhat
) B5 F( E Y ]+ w6 Hearly puberty and had stopped growing by age 14.
; Z8 I# X" P" NThe father denied taking any other medication. The( n: k% k, _) f- F# F( G) x* u
child’s mother was in good health. Her menarche/ g. u) u% r, u" Z0 D5 U
was at 11 years of age, and her height was at 5 feet
( u3 X3 D- _' _$ B$ s& q* e5 inches. There was no other family history of pre-! v4 z! }% k! d, T. }
cocious sexual development in the first-degree rela-
5 p4 Y, L. z& \. _6 W) o8 Ftives. There were no siblings.
* A; B+ y# q. m E9 DPhysical Examination
0 n1 s4 y' z4 }3 c3 m( ^6 \4 `: N" ]+ MThe physical examination revealed a very active,1 g7 N# l) z3 N( _1 e# Y: _3 G5 M d
playful, and healthy boy. The vital signs documented
0 U0 k- g8 M) e3 U/ z; t5 r, `a blood pressure of 85/50 mm Hg, his length was
6 x& V2 w; c8 G8 M0 C, u$ D90 cm (>97th percentile), and his weight was 14.4 kg( o( T/ D5 \$ x( J- n
(also >97th percentile). The observed yearly growth: O- s: j- Z1 ]1 z7 h. i: }
velocity was 30 cm (12 inches). The examination of
4 z% K# M5 S! r/ H% q ~ Q7 a tthe neck revealed no thyroid enlargement.
& i' i8 |( d, y9 ?4 j8 @+ sThe genitourinary examination was remarkable for" j% h1 A4 H1 \* ]% \0 v
enlargement of the penis, with a stretched length of" _8 K6 T7 R# B/ b
8 cm and a width of 2 cm. The glans penis was very well7 D4 y7 x8 I2 f- Q- f0 E
developed. The pubic hair was Tanner II, mostly around
1 e/ {1 S% i& ?8 w3 g540! Q& l+ X, N2 |3 B9 z; l
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 s* u5 U) }( \
the base of the phallus and was dark and curled. The
; c% A4 Z$ f% U. ~7 M; r) n) Mtesticular volume was prepubertal at 2 mL each.
- X0 Z3 R# l0 n( JThe skin was moist and smooth and somewhat
3 W' r6 C6 t C/ e5 xoily. No axillary hair was noted. There were no
2 v* L5 o8 E; a0 W# ^abnormal skin pigmentations or café-au-lait spots.
8 B% c" v( F. w; \Neurologic evaluation showed deep tendon reflex 2+3 h" d# W0 s( h s1 W# U. i
bilateral and symmetrical. There was no suggestion
; e: T) o" W- U7 p. `3 mof papilledema. r! O4 k) K7 Z& h: e% V
Laboratory Evaluation; K* Z, p8 _* O2 c5 j( A1 Z
The bone age was consistent with 28 months by
( B- l! R5 _ y0 k: p/ T! Zusing the standard of Greulich and Pyle at a chrono-
0 X) @, k$ f9 Y E1 }& n4 glogic age of 16 months (advanced).5 Chromosomal
) ]( N4 u% Q) t2 n& `% Kkaryotype was 46XY. The thyroid function test
- C1 Z0 h2 f$ s# w9 {# ]showed a free T4 of 1.69 ng/dL, and thyroid stimu-
# K: T( p6 t1 f3 ~$ tlating hormone level was 1.3 µIU/mL (both normal).
- x" g0 B+ e% a; tThe concentrations of serum electrolytes, blood9 n! I0 ^5 Y% V7 N6 w
urea nitrogen, creatinine, and calcium all were, m* R5 \+ t5 K: [
within normal range for his age. The concentration
# S. O- X* M1 tof serum 17-hydroxyprogesterone was 16 ng/dL. Y# |0 P, S/ S2 N# v A
(normal, 3 to 90 ng/dL), androstenedione was 20
2 Z; v# O/ L* p, D+ s* [. yng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& K: E) }$ H( e: Tterone was 38 ng/dL (normal, 50 to 760 ng/dL),
" T+ F* H& ^% f' E# r% i' rdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
+ D( N9 d1 \8 L" f49ng/dL), 11-desoxycortisol (specific compound S)
! m& C9 \3 S, l% hwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ e3 w% z& ? x# t( d! Y$ ftisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
# p. I# [$ a$ y9 stestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
# U8 W. |' r3 S! v" rand β-human chorionic gonadotropin was less than! Y% o$ J1 k0 u0 b7 B1 K) M
5 mIU/mL (normal <5 mIU/mL). Serum follicular( }, H; O5 ] M1 g
stimulating hormone and leuteinizing hormone2 S- t1 Z. j, t3 Y
concentrations were less than 0.05 mIU/mL- Z( t5 b7 U" g' g! K" v
(prepubertal).
5 ~/ W$ g4 `, A% f$ Z6 R4 cThe parents were notified about the laboratory T; B4 c3 ]) @
results and were informed that all of the tests were0 g) u# O6 t, i$ C4 U
normal except the testosterone level was high. The! D7 }! n( r( g
follow-up visit was arranged within a few weeks to3 g# p( o( i' `) C# C. z! `3 r
obtain testicular and abdominal sonograms; how-
6 b c6 y" h! v. C7 o8 z$ Uever, the family did not return for 4 months.
7 z) O- v: X$ mPhysical examination at this time revealed that the
. {% A6 |: B3 u2 Schild had grown 2.5 cm in 4 months and had gained
+ q. m( ^; u$ D3 J2 kg of weight. Physical examination remained
) i6 N: c( _9 `1 runchanged. Surprisingly, the pubic hair almost com-
* d" b& K8 E: z! t6 Npletely disappeared except for a few vellous hairs at- _, ^; G2 F) E) v
the base of the phallus. Testicular volume was still 2
8 R+ s; j& G* N v. N+ N9 [: G: DmL, and the size of the penis remained unchanged.2 Q6 |3 d6 [- N' `
The mother also said that the boy was no longer hav-0 {8 L" [' p. G4 m' x
ing frequent erections.
, g3 n$ A# p& K* J- q9 u' wBoth parents were again questioned about use of
" n* g$ N3 u) i- b) ^any ointment/creams that they may have applied to
& ?& [* n: S9 Q- g. O' P! ~# A9 [* athe child’s skin. This time the father admitted the1 O9 [4 N9 ?. e+ p& v
Topical Testosterone Exposure / Bhowmick et al 541& @ g3 y5 a! m
use of testosterone gel twice daily that he was apply-
. o7 |$ o6 K. f4 Y. Bing over his own shoulders, chest, and back area for
' a8 s: c. g# ^ G1 Ja year. The father also revealed he was embarrassed9 B8 L$ h/ x3 q9 g
to disclose that he was using a testosterone gel pre-
3 v6 a: y& c' x& y/ D2 i+ lscribed by his family physician for decreased libido
6 x) b# G; T- i' [- C" Z6 xsecondary to depression.8 C& k, v/ q" e2 l P& [* W2 Q
The child slept in the same bed with parents.& O. X' x- @3 ]
The father would hug the baby and hold him on his. F k7 F+ a) L$ J6 T' ~7 H( [
chest for a considerable period of time, causing sig-
' M( ?" w, K' y6 N: c5 Unificant bare skin contact between baby and father.( j- [) j0 g. P4 U+ L
The father also admitted that after the phone call,
! A0 V" E0 s, U4 E2 F! n8 k9 g6 w8 ywhen he learned the testosterone level in the baby
# C x. k* K9 w0 P* Iwas high, he then read the product information7 r- O% U6 A. v$ \
packet and concluded that it was most likely the rea-
0 t. `8 m$ `6 Tson for the child’s virilization. At that time, they
5 V# ?+ `& `% vdecided to put the baby in a separate bed, and the; @6 ?( q0 v4 Y/ \
father was not hugging him with bare skin and had
1 I0 `7 \4 }9 @" qbeen using protective clothing. A repeat testosterone
2 _2 P+ [: I% J# L j, ^9 @test was ordered, but the family did not go to the
: k, T: O+ H+ B/ Q! v' E2 }- Nlaboratory to obtain the test.3 k. Q- f" C/ J! N' i
Discussion
7 w+ v9 _- k8 K; e/ F- f9 e. m1 EPrecocious puberty in boys is defined as secondary
. E& a8 O9 ~( G6 Y! Csexual development before 9 years of age.1,4
p; ~( p0 Z- sPrecocious puberty is termed as central (true) when% [( ^( e0 o2 K" S; u, t; p
it is caused by the premature activation of hypo-" W' L' |4 u, l5 i8 C" w$ e" F" S$ F
thalamic pituitary gonadal axis. CPP is more com-
2 J' L1 i& U/ fmon in girls than in boys.1,3 Most boys with CPP. |" K0 _" R& y7 \2 F7 G1 e. S* t
may have a central nervous system lesion that is
9 J# {# n2 {" J5 l* fresponsible for the early activation of the hypothal-
. E5 J+ r+ b: Samic pituitary gonadal axis.1-3 Thus, greater empha-& u( y* U$ f6 R8 G% K+ r
sis has been given to neuroradiologic imaging in
! @7 U; y( g4 A8 Kboys with precocious puberty. In addition to viril-
, E; d0 K9 U, nization, the clinical hallmark of CPP is the symmet-
! ]. \8 I, d* |rical testicular growth secondary to stimulation by
7 p9 n$ A/ A; o! `8 C, Bgonadotropins.1,3; R" P+ r0 m+ t- A# P
Gonadotropin-independent peripheral preco-
! D* |2 T" ]' U( Ccious puberty in boys also results from inappropriate; a. G; y3 ]4 F; K* t4 ^5 `% t
androgenic stimulation from either endogenous or
$ \& N/ R" Q8 k$ M5 ^( Y5 @exogenous sources, nonpituitary gonadotropin stim-
0 L1 k) }. E/ m7 \ulation, and rare activating mutations.3 Virilizing
# ~- }3 B0 r0 T4 W) rcongenital adrenal hyperplasia producing excessive+ l) T g. n2 [# C# X! H9 t
adrenal androgens is a common cause of precocious3 p; e9 B7 H' H# f' [$ | \! @
puberty in boys.3,4
# Y3 ]8 G; T. S' a/ WThe most common form of congenital adrenal. E0 D/ T+ m2 _ R% ]
hyperplasia is the 21-hydroxylase enzyme deficiency.2 P" Z- A1 u7 h* b. |
The 11-β hydroxylase deficiency may also result in
$ T* p t. R" l5 D% }! cexcessive adrenal androgen production, and rarely,1 {4 N, {: F- k( k( b
an adrenal tumor may also cause adrenal androgen
: i# F4 f& j/ K0 ~excess.1,3# u" i( m1 N% G3 F
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 Y6 v( [) M8 m" i/ T x0 I
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007) I [4 } v7 a% G
A unique entity of male-limited gonadotropin-/ M5 S( a5 q4 q: z& M( Q' F4 F8 m
independent precocious puberty, which is also known& k, |9 L8 _! t/ E9 _' m9 k
as testotoxicosis, may cause precocious puberty at a: f2 E5 x- H- m+ v: ?
very young age. The physical findings in these boys
4 G! F) s7 i5 {+ |5 dwith this disorder are full pubertal development, \5 h9 e6 ?% i0 G: l$ m
including bilateral testicular growth, similar to boys
# C: k7 O, r# S* f7 q9 {7 Ewith CPP. The gonadotropin levels in this disorder9 h# P$ c4 w1 p8 e8 k2 R
are suppressed to prepubertal levels and do not show1 I* m! v+ G& C& d
pubertal response of gonadotropin after gonadotropin- l6 s# B$ Z0 Y$ ]4 E. F
releasing hormone stimulation. This is a sex-linked5 l5 g, u6 w7 [/ @' h: F( @* p& ^
autosomal dominant disorder that affects only' a2 ?! K! g( ?, Y# B- v/ \: v
males; therefore, other male members of the family
5 u6 @! ?: Z2 J$ H8 ^/ L6 ?may have similar precocious puberty.3
# x( Q. v% b. P. y' L0 G( NIn our patient, physical examination was incon-
! ~0 I' p, ?! |& a6 Bsistent with true precocious puberty since his testi-
& U& i, @3 b8 W( t% k4 N4 jcles were prepubertal in size. However, testotoxicosis
8 X$ B" J6 ]. g+ A; |/ t( ^( qwas in the differential diagnosis because his father
, E! Z; I2 t( C6 Mstarted puberty somewhat early, and occasionally,* [' W1 _* ?: ?. k* d6 [2 z
testicular enlargement is not that evident in the
& ^6 `' H/ D, Q3 U2 Rbeginning of this process.1 In the absence of a neg-3 |8 g1 a% p9 T
ative initial history of androgen exposure, our
+ A/ B6 n- T. f7 Lbiggest concern was virilizing adrenal hyperplasia,
K' V9 T' M1 ` qeither 21-hydroxylase deficiency or 11-β hydroxylase
( {- Z l% q* H) k$ L8 Fdeficiency. Those diagnoses were excluded by find-
) h; a" F9 d9 `/ k0 {- y+ O1 a7 @ing the normal level of adrenal steroids." F a+ N% X' E5 m6 Q
The diagnosis of exogenous androgens was strongly
1 ?5 W% j! S* [; ssuspected in a follow-up visit after 4 months because
0 T9 G& R C: N/ |7 s( f, cthe physical examination revealed the complete disap-5 k0 L& `" n% ?
pearance of pubic hair, normal growth velocity, and
7 |9 E- A/ Q) N1 I4 A% X0 jdecreased erections. The father admitted using a testos-
; C; j" G; ~ ~terone gel, which he concealed at first visit. He was
5 N8 x# R1 z% y/ X; D5 Q( B7 T+ Jusing it rather frequently, twice a day. The Physicians’- a9 K3 [. R1 x. N! E
Desk Reference, or package insert of this product, gel or( z* J( B' y& p$ `! Q5 Y
cream, cautions about dermal testosterone transfer to( l; H# f5 ^6 b; W9 O' k% M t
unprotected females through direct skin exposure.* `8 o+ ^: }6 ^: \2 |
Serum testosterone level was found to be 2 times the
7 S6 R! b3 F* }% p. `baseline value in those females who were exposed to
. q6 |3 s& w3 e5 l1 B9 i& jeven 15 minutes of direct skin contact with their male
* l4 ?( D( y0 m5 G* I! R y% ?partners.6 However, when a shirt covered the applica-
6 g$ b9 O }" _* p9 k! @5 htion site, this testosterone transfer was prevented.
3 w; f# V6 K0 x' eOur patient’s testosterone level was 60 ng/mL,
/ E( i; t9 f( T/ U1 Z- v/ Ewhich was clearly high. Some studies suggest that
; O& G! Z- C! ?3 K6 ?dermal conversion of testosterone to dihydrotestos-
1 [7 V& v% s2 n4 f4 d5 xterone, which is a more potent metabolite, is more" N3 E( D9 u! o* |
active in young children exposed to testosterone. }2 S9 N/ h4 {) ~( e w$ g7 J! P7 u. o
exogenously7; however, we did not measure a dihy-' O) Y- `0 a8 y% h- i. c5 @
drotestosterone level in our patient. In addition to' i( ]1 z! o& R5 i! i
virilization, exposure to exogenous testosterone in" E& k9 x* J# z
children results in an increase in growth velocity and
' j' U* [' q" r1 Tadvanced bone age, as seen in our patient.
3 @) b/ X7 w0 f, aThe long-term effect of androgen exposure during
4 M9 k, m0 `3 o: @9 H% n& T7 h! Nearly childhood on pubertal development and final! d( a% X5 h) s7 Y: Q6 Y
adult height are not fully known and always remain& ~' q6 q- e, j$ A, z" ?$ d# m
a concern. Children treated with short-term testos-2 B n3 V6 [+ R9 _
terone injection or topical androgen may exhibit some( {7 w# [! h; ~, |9 P5 p( ~
acceleration of the skeletal maturation; however, after
2 x5 u" v8 E) ?. s2 z* J$ l' gcessation of treatment, the rate of bone maturation! a% j) J' N, K3 x3 d2 E
decelerates and gradually returns to normal.8,9
+ I/ E( x) E$ ]9 T q0 rThere are conflicting reports and controversy8 n0 K* B+ h! h o/ w
over the effect of early androgen exposure on adult
N7 _( c7 F5 x8 _) \" G! N6 dpenile length.10,11 Some reports suggest subnormal
. _- D) Q+ j2 t, r8 ^% z$ Madult penile length, apparently because of downreg-8 o8 U# R5 _; t) E4 C( |
ulation of androgen receptor number.10,12 However,
Z" \6 @; c: WSutherland et al13 did not find a correlation between. N% g# j6 _) R+ H% H* x, a
childhood testosterone exposure and reduced adult
7 P4 B; w0 ?1 V" a3 o$ r zpenile length in clinical studies.
. L% a9 j/ u8 @$ A6 O3 _, ~5 CNonetheless, we do not believe our patient is [ d* F# H5 a/ N+ S8 A- U
going to experience any of the untoward effects from
4 w/ t4 B% b# Z% `. k8 ?- a7 Ktestosterone exposure as mentioned earlier because/ _ `, y" K2 R8 R. ^2 |& a
the exposure was not for a prolonged period of time., I6 P3 B4 L2 K! e3 _$ n
Although the bone age was advanced at the time of
5 }% u- M7 n" i5 X( q2 j- S+ Ediagnosis, the child had a normal growth velocity at
8 K$ P4 G8 |" J5 t1 C/ Qthe follow-up visit. It is hoped that his final adult
" r( p( k0 u0 @( ?: Theight will not be affected.: y3 ? u# I2 z9 M1 D' I
Although rarely reported, the widespread avail-
, v/ }# o4 W/ \2 ~5 a2 J, Bability of androgen products in our society may
. E1 i1 z) R; T5 C+ {7 d C" eindeed cause more virilization in male or female
( r& z6 v8 r) G/ S( j$ Tchildren than one would realize. Exposure to andro-
`) O) @$ \' I/ m) X4 p0 w/ dgen products must be considered and specific ques-$ h2 @: ?5 \$ g7 \; p
tioning about the use of a testosterone product or
- ^+ {, ~1 ~0 o. o" ~3 wgel should be asked of the family members during8 V% K6 M8 G8 z( r; X3 W# m& j/ ?
the evaluation of any children who present with vir-
; z/ D3 d- U' V$ ?# u& lilization or peripheral precocious puberty. The diag-
7 x( C9 Q' h. Ynosis can be established by just a few tests and by
. w5 n$ b( [5 d0 ~5 r( \4 P( nappropriate history. The inability to obtain such a x7 K8 A7 m0 H" \% P* C0 X2 X9 [
history, or failure to ask the specific questions, may
" h! \3 f$ m' j xresult in extensive, unnecessary, and expensive! A- [; C4 ~) M
investigation. The primary care physician should be
! X% g& g$ i% X1 W# s1 Qaware of this fact, because most of these children/ _% p6 u: X% a8 D4 C& ?6 M
may initially present in their practice. The Physicians’; T1 y. s) _: e6 w2 A5 _) u
Desk Reference and package insert should also put a9 O3 C9 {4 f* M2 y! D3 W f
warning about the virilizing effect on a male or
9 C% g0 w; m6 h- S) W/ [female child who might come in contact with some-
" C, v1 {4 x. ~one using any of these products.
) R/ U1 g% r) d" iReferences' i: D) |5 h5 b+ C) C# @2 S$ I3 Z* U
1. Styne DM. The testes: disorder of sexual differentiation( t ] M% z- q0 C8 J
and puberty in the male. In: Sperling MA, ed. Pediatric
) O2 b" w3 j; c9 vEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
. M' c) I7 V. j9 w2002: 565-628.
* V9 U+ C9 `9 v o6 v2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
0 \& M8 m, U3 mpuberty in children with tumours of the suprasellar pineal8 ]$ `; k0 M4 `3 `
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. y* `6 W. ?( H, r% g6 N
Topical Testosterone Exposure / Bhowmick et al 543
4 ~9 R3 a1 S! O) z Zareas: organic central precocious puberty. Acta Paediatr.
( b7 z& ?: \* Z7 y4 L- u2001;90:751-756.
/ m% ]3 s* ? H3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
' E4 t: y0 v0 {Pediatric Endocrinology. 4th ed. New York, NY: Marcel
?, M1 c, U' v K3 `. X6 }" LDekker Inc; 2003:211-238.
3 n4 F. Y1 J1 d4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
2 C; a0 Q, @6 y( W1 \0 G+ I% udevelopment in a two-year-old boy induced by topical
8 C% c2 E& R9 h3 G( U% w5 {7 Eexposure to testosterone. Pediatrics. 1999;104:e23.- J2 g- o6 z2 _* K9 }
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
: `) l8 a! C1 S% lSkeletal Development of the Hand and Wrist. 2nd ed.* ^8 d I( n d1 ]2 n6 @- q$ X" }
Stanford, CA: Stanford University Press; 1959.
; N$ Z' v5 O* R7 S7 g6. Physicians’ Desk Reference. Androgel 1% testosterone,
2 L0 a, H+ N0 S. p, f3 I- `Unimed Pharmaceutical Inc. Montvale, NJ: Medical% A3 z0 Y$ S6 _# [
Economics Company, Inc; 2004:3239-3241.$ w* ^5 U6 `) j
7. Klugo RC, Cerny JC. Response of micropenis to topical
; n1 Y! ~# K9 B( vtestosterone and gonadotropin. J Urol. 1978;119:
1 _! M4 q) }1 }# Y, U667-668.
. g: J; r/ J) I4 ~! h; q8. Guthrie RD, Smith DW, Graham CB. Testosterone3 d' E. y$ g) v" u- g/ m$ ]$ h
treatment for micropenis during early childhood. J Pediatr.
8 X; F, P+ A2 ?8 l* t1973;83:247-252.
( k- i9 D: R. P0 O% M9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone9 U+ Z0 G# w0 E; _) f
therapy for penile growth. Urol. 1975;6:708-710." ]+ O6 k% W8 Z& A* k( q7 h
10. Husmann DA, Cain MP. Microphallus: eventual phallic
' p& v% |( y2 g; m/ t3 b6 P1 ^size is dependent on the timing of androgen administra-+ I6 ~, Z0 E+ Y7 V. T0 D& q8 e
tion. J Urol. 1994;152:734-739.& i$ u$ A# M5 I8 Y! \! O5 ^1 f+ G
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:+ F R# s, \4 s
does early treatment with testosterone do more harm
# D/ T/ v% Y: Dthan good? J Urol. 1995;154:825-829.+ J! C7 i2 x5 O0 L/ w2 I
12. Takane KK, George FW, Wilson JD. Androgen receptor
& E I5 W" D2 n* d$ y( `of rat penis is down-regulated by androgen. Am J Physiol.
9 D8 V& ~/ P+ u2 I! P3 J* @1990;258:E46-E50.0 O" J, v. \% q1 t, l8 Q) Q& u/ F
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect/ G! i3 G7 k, U7 J6 e
of prepubertal androgen exposure on adult penile
! @& l9 |; d8 K) t7 elength. J Urol. 1996;156:783-787. |
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