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is a significant concern for physicians. Central9 |5 P) B2 R8 e$ M0 P7 K4 _7 |( W
precocious puberty (CPP), which is mediated
z1 P G, P/ Z: l5 P) @8 [1 ?through the hypothalamic pituitary gonadal axis, has9 c; p0 h. k# B$ B
a higher incidence of organic central nervous system( q% ]0 `) t! S; z
lesions in boys.1,2 Virilization in boys, as manifested
. o9 j2 x6 U9 `! `) Z8 nby enlargement of the penis, development of pubic
4 ]/ l1 Q* |0 v& _hair, and facial acne without enlargement of testi-* X/ `8 {/ P) E) w
cles, suggests peripheral or pseudopuberty.1-3 We4 d- e' \) U$ ]$ X4 L
report a 16-month-old boy who presented with the
- D7 m7 l& v1 E) Cenlargement of the phallus and pubic hair develop-3 ^& z9 ?7 S* }% i, p# n8 }4 G
ment without testicular enlargement, which was due4 Q. E1 x$ A3 C$ z0 |8 h
to the unintentional exposure to androgen gel used by0 q% p, ^. j% q3 S" [! _! l% z9 s. a
the father. The family initially concealed this infor-
$ D: F5 s1 V6 smation, resulting in an extensive work-up for this
7 s2 x( s( N! `7 K# b4 B u( o! M; \child. Given the widespread and easy availability of9 r1 t/ L/ g3 B2 m. P$ |1 u# j
testosterone gel and cream, we believe this is proba-: t p5 {$ V h8 g* C/ z* S4 k
bly more common than the rare case report in the
" Z3 \6 T4 {; F1 Y) M+ Z0 s" p! wliterature.4
" v r2 J% e! ]. ~: X9 pPatient Report0 l+ m1 |2 H {0 {4 l7 M
A 16-month-old white child was referred to the T4 W4 l* Z! E$ M. s4 s
endocrine clinic by his pediatrician with the concern# [2 P. [! e; W8 t
of early sexual development. His mother noticed
: } ^; g+ f& n2 d6 L0 Tlight colored pubic hair development when he was- C6 y' g" u; |
From the 1Division of Pediatric Endocrinology, 2University of
9 E7 }; L" r" {1 SSouth Alabama Medical Center, Mobile, Alabama.
! k" U$ L8 e" A5 Z& r/ hAddress correspondence to: Samar K. Bhowmick, MD, FACE,
& m9 q: ?- u# b; X/ B$ eProfessor of Pediatrics, University of South Alabama, College of
* l$ A( ~8 D% D" n- l# aMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297; y9 q. I; Z& q+ |/ ?9 G
e-mail: [email protected].
- h- s! {' ?) Z' }: [" Iabout 6 to 7 months old, which progressively became* P; `( M8 V/ Q7 ?
darker. She was also concerned about the enlarge-
4 g. O2 l3 D# r' V" Xment of his penis and frequent erections. The child3 Q6 e5 v8 b8 W2 Y) N3 j
was the product of a full-term normal delivery, with
3 w- J* ^& Q8 ^+ h( M w4 X6 C* I8 Ga birth weight of 7 lb 14 oz, and birth length of, F D* U$ J0 I7 U
20 inches. He was breast-fed throughout the first year0 `& M. N0 ]7 J, @% x& H* }1 C' b
of life and was still receiving breast milk along with9 Q/ G; U+ C% O, X
solid food. He had no hospitalizations or surgery,( `& Q6 v6 b0 \# w3 p" s7 b$ y
and his psychosocial and psychomotor development
" ` R! T6 J/ s# E- O# H; Ywas age appropriate.5 Q6 t0 T( j2 r9 a; {, a: [
The family history was remarkable for the father,
% Y. D1 G" C. _. A# A/ ^who was diagnosed with hypothyroidism at age 16,( E6 P. C4 t+ @ d
which was treated with thyroxine. The father’s. P& s3 V" ?& z) I$ U
height was 6 feet, and he went through a somewhat4 _& l8 u* S. J4 `7 o
early puberty and had stopped growing by age 14.
+ w( I3 W" J5 D4 o) n6 U6 Q. m: pThe father denied taking any other medication. The8 N2 T! ~% _! w- f$ K
child’s mother was in good health. Her menarche
9 y( M, r* J% I% M( xwas at 11 years of age, and her height was at 5 feet
1 H6 ?$ s- G; a9 S% `% {5 M1 Z5 inches. There was no other family history of pre-
: b+ i! p+ i4 I. _, A% K: F; _cocious sexual development in the first-degree rela-
1 u* X3 o+ h' U8 Y# @tives. There were no siblings.4 v% X M+ B1 X* k5 x& o2 d
Physical Examination
# {* g: J7 m6 @The physical examination revealed a very active,' X4 D- z0 N- a( w3 S, _
playful, and healthy boy. The vital signs documented
* k# b: R- U/ s8 ~* j; } aa blood pressure of 85/50 mm Hg, his length was* G6 m% g7 m: ]+ K
90 cm (>97th percentile), and his weight was 14.4 kg
1 g! E; `. t: A4 S(also >97th percentile). The observed yearly growth
, ?# W" n+ ^" D3 K% E/ R) `% _- Gvelocity was 30 cm (12 inches). The examination of" [ g' p5 `% X* ]" F
the neck revealed no thyroid enlargement.2 n6 c5 \* e9 K) G$ z" V' b# Y
The genitourinary examination was remarkable for
; ]. M4 H2 ?6 ^2 k: Y) cenlargement of the penis, with a stretched length of( N" T, c8 W9 j) j; G
8 cm and a width of 2 cm. The glans penis was very well
; }# m Q3 G. @4 _- ^developed. The pubic hair was Tanner II, mostly around1 P$ F4 w' M5 s' A; r1 t. I
540
* o5 n6 Z: U R* R: F: z( Pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) D$ K h9 C! g2 A+ ]
the base of the phallus and was dark and curled. The
3 ?% f6 m, x% Vtesticular volume was prepubertal at 2 mL each.! F* Z* y, `2 k+ X# A
The skin was moist and smooth and somewhat
7 Q" [7 V; i% z4 Ooily. No axillary hair was noted. There were no. {5 p* l$ x! V0 }
abnormal skin pigmentations or café-au-lait spots.
( Y! n% M/ Y% l' F2 r' ^Neurologic evaluation showed deep tendon reflex 2+" q( ^, {& e( L$ k7 K# F+ Q
bilateral and symmetrical. There was no suggestion% z6 r; k- a ^1 a' F Q% H! d
of papilledema.( A @0 D* g7 ~: s' f7 Q; O
Laboratory Evaluation6 N% c- p$ f& y6 c% C- `6 @
The bone age was consistent with 28 months by
7 @; T( t5 w; h6 _' m6 {1 ~using the standard of Greulich and Pyle at a chrono-
& D7 {6 e: j% D6 ?logic age of 16 months (advanced).5 Chromosomal
2 i: Z( K% W6 t7 K" X& h" f# d5 Nkaryotype was 46XY. The thyroid function test Y0 ]: f3 N( ?( @2 g
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
4 J' S" t2 s2 _" i8 F7 F* Wlating hormone level was 1.3 µIU/mL (both normal).
+ \3 w, H# Q# oThe concentrations of serum electrolytes, blood( F: N8 h! M5 o8 ^
urea nitrogen, creatinine, and calcium all were
) `9 J( g" q! t8 gwithin normal range for his age. The concentration
3 W" ~. B4 U" [! A) |of serum 17-hydroxyprogesterone was 16 ng/dL
2 ~: C! d0 r6 e(normal, 3 to 90 ng/dL), androstenedione was 20$ L0 [: l5 q- y
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-! m/ l" Y( f1 H- B
terone was 38 ng/dL (normal, 50 to 760 ng/dL),* F- w% c8 n4 Y- r2 t( N. Q! ]
desoxycorticosterone was 4.3 ng/dL (normal, 7 to# A+ i2 E, x- H6 J
49ng/dL), 11-desoxycortisol (specific compound S)
3 s2 E/ l! }1 N( [% kwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
. L7 B6 l4 o4 R6 n) c- b" rtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
/ j& y: T8 k9 ^2 L+ X1 S1 \5 Ztestosterone was 60 ng/dL (normal <3 to 10 ng/dL),3 q F% u+ F. W% e: {
and β-human chorionic gonadotropin was less than
2 V0 Z4 ^9 P m6 O* }3 U- i+ Q9 \5 mIU/mL (normal <5 mIU/mL). Serum follicular$ Q" H9 d2 i; @& Y7 K; E9 @' ~& l
stimulating hormone and leuteinizing hormone
" o4 s3 Q+ V" D% f8 qconcentrations were less than 0.05 mIU/mL
8 u4 G. {6 B6 v. L(prepubertal).8 D: ~$ z0 @2 x; Y$ G( S; I% `
The parents were notified about the laboratory( J n! e F# E) @6 ~ J
results and were informed that all of the tests were
4 W* a+ i* ^5 K/ s) j" _) [normal except the testosterone level was high. The. L N0 s' m0 i2 r9 B& [7 Z
follow-up visit was arranged within a few weeks to" b/ ^# i% g9 m( n, t3 B
obtain testicular and abdominal sonograms; how-
0 s' `+ z% [/ k! g5 o0 P. oever, the family did not return for 4 months.
- n. N8 d+ ?$ }5 l! l# hPhysical examination at this time revealed that the
: K% a& p. L/ |0 xchild had grown 2.5 cm in 4 months and had gained& _8 I2 ]' f( k. R' h+ J2 \
2 kg of weight. Physical examination remained& L2 i2 g3 R: x1 }2 L
unchanged. Surprisingly, the pubic hair almost com-
5 |: c- h0 e* b1 z, \5 h( H0 U( ?pletely disappeared except for a few vellous hairs at1 O% _$ R: j9 S$ y, J \6 G3 ~7 P' N
the base of the phallus. Testicular volume was still 2$ D f9 o3 m' y4 v0 b# w2 b7 O" \
mL, and the size of the penis remained unchanged.2 |- U9 I2 j M( L
The mother also said that the boy was no longer hav-
4 N. y% q. w9 hing frequent erections.9 X. @8 ~, V: Y& ^
Both parents were again questioned about use of
' J( @6 |# w& p, A0 Y7 U+ Aany ointment/creams that they may have applied to" ^- }2 E! t7 n# A5 u
the child’s skin. This time the father admitted the# A6 Q$ Q7 e9 ?
Topical Testosterone Exposure / Bhowmick et al 541! ?( Y* Q) {, K
use of testosterone gel twice daily that he was apply-; M! p" V+ n# G- G( {
ing over his own shoulders, chest, and back area for
" l9 Z6 B. C' p1 G2 pa year. The father also revealed he was embarrassed6 ^- e; }1 f- V- I7 T
to disclose that he was using a testosterone gel pre-5 W9 G& V- ^% ]7 m# d6 W: H+ k3 L
scribed by his family physician for decreased libido0 `& r% C* J/ A! v" P! z
secondary to depression.8 R, }0 g" O4 c% Y. q
The child slept in the same bed with parents.
0 ^! O# k% G. Z; f9 OThe father would hug the baby and hold him on his% I s8 T# A" P
chest for a considerable period of time, causing sig-, L2 Q5 s" `$ ^
nificant bare skin contact between baby and father.
! B) a- W y! W T0 }The father also admitted that after the phone call,
, e. L' |' G% _% M( L' xwhen he learned the testosterone level in the baby. `9 H. q* q$ q) z- e5 r( J2 X3 N
was high, he then read the product information2 f# ]6 s1 c. H9 Y9 P
packet and concluded that it was most likely the rea-
3 A8 v4 y, P" z2 B& I" G8 _' Bson for the child’s virilization. At that time, they; W% M, T7 V/ W9 Z9 L2 Q) R, x
decided to put the baby in a separate bed, and the
/ N: _7 l/ }! ^9 h+ V' g/ }' Ifather was not hugging him with bare skin and had
& m i# C! U3 Y0 v' E4 xbeen using protective clothing. A repeat testosterone# k+ ^7 l( t; M
test was ordered, but the family did not go to the
# t4 L$ V8 y* s2 d; B) g' M' ^laboratory to obtain the test.
4 G# k* X3 |: U- k F# ^Discussion
/ p) \! j4 ?: }- EPrecocious puberty in boys is defined as secondary
4 T( T# [0 B0 N! o7 osexual development before 9 years of age.1,45 w1 P; f5 ^4 z* `6 B
Precocious puberty is termed as central (true) when
) d. Y7 F, l+ t7 T. A3 ?it is caused by the premature activation of hypo-
6 R7 G6 t& {+ D5 H, R S9 M/ ythalamic pituitary gonadal axis. CPP is more com-' u! U+ Q& s8 n
mon in girls than in boys.1,3 Most boys with CPP, ?# _# A# N3 E% I* J
may have a central nervous system lesion that is9 \ J/ D/ O) g4 z
responsible for the early activation of the hypothal-
6 C. `5 M9 D# K% w8 \3 ]5 k jamic pituitary gonadal axis.1-3 Thus, greater empha-4 \3 A9 ^# \8 S7 e2 h; v5 k& |# O
sis has been given to neuroradiologic imaging in# u. Q1 W0 v9 S1 \# t# {0 s
boys with precocious puberty. In addition to viril- ~" }: s% s$ Z* P
ization, the clinical hallmark of CPP is the symmet-7 m k l; n6 {$ u: X
rical testicular growth secondary to stimulation by/ }( u% O( R! v5 S5 J8 ~$ Z
gonadotropins.1,3$ @8 T1 X; b3 c: j, V' q# v
Gonadotropin-independent peripheral preco- r7 g8 r* Q: o& A" r
cious puberty in boys also results from inappropriate% O2 s) t+ h! `( F4 q
androgenic stimulation from either endogenous or
& I3 {. J Q* z' d4 ^# oexogenous sources, nonpituitary gonadotropin stim-- y2 y3 H+ S# F
ulation, and rare activating mutations.3 Virilizing
9 U: ~* k' x& J9 q, s" Pcongenital adrenal hyperplasia producing excessive( C0 C' b& H3 o0 I
adrenal androgens is a common cause of precocious
4 M- u/ B8 H# ~puberty in boys.3,4- v2 u6 D. r K [9 U) ~
The most common form of congenital adrenal
) C6 `( c5 g1 A3 X. G; U7 O. k5 Ahyperplasia is the 21-hydroxylase enzyme deficiency.
! t4 s1 ]) e( L& Y8 d9 M7 }The 11-β hydroxylase deficiency may also result in
7 U! Q/ o) `' \% E, ^2 d- fexcessive adrenal androgen production, and rarely,
4 R) t( G! U( F: ?an adrenal tumor may also cause adrenal androgen8 u7 ~! \1 J# B6 h0 I: U
excess.1,3
4 n# p; {) d6 j9 g8 c: w7 T/ ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ b. i1 w+ t& b5 B542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
8 l! O9 m* \8 \& Y( S: GA unique entity of male-limited gonadotropin-
. F# ?; }9 E) \independent precocious puberty, which is also known
6 `' n* m6 [" Y, M' q" kas testotoxicosis, may cause precocious puberty at a2 U' f: G. F3 K4 c0 Y* ?3 E3 ^
very young age. The physical findings in these boys$ e d D4 e# R1 d
with this disorder are full pubertal development," Q- y5 W4 u$ u3 [9 [$ ?' b6 r
including bilateral testicular growth, similar to boys
7 r% J9 }9 s2 L* t2 g7 d9 e1 D- Hwith CPP. The gonadotropin levels in this disorder* u9 ^/ }6 b6 P0 Q- X5 x3 R; u
are suppressed to prepubertal levels and do not show
* M# q' ]6 l" s5 s0 s# `1 upubertal response of gonadotropin after gonadotropin-
/ o& X) n o6 V5 d; ^3 G- j9 jreleasing hormone stimulation. This is a sex-linked
% ^- f( J7 D s# K# Eautosomal dominant disorder that affects only: S1 k! F! a6 A# t# b1 A' {( g) i
males; therefore, other male members of the family7 k9 D; N* n1 B! B
may have similar precocious puberty.3
4 d) C) V, n( Y6 _# Q H9 [In our patient, physical examination was incon-0 y# u; `" @6 S! P/ d% m& v
sistent with true precocious puberty since his testi-
$ G8 Y7 b6 \& v, y9 |cles were prepubertal in size. However, testotoxicosis
1 H# ^5 m8 [% x+ R5 O) Iwas in the differential diagnosis because his father
& h' [2 c7 s5 `: Y. xstarted puberty somewhat early, and occasionally,8 s7 p: N; z$ ?8 e3 S% S8 Y
testicular enlargement is not that evident in the
3 x5 X; ]8 F. I5 ubeginning of this process.1 In the absence of a neg-# ]2 v- h+ z4 A: Q6 G) m* U7 t
ative initial history of androgen exposure, our
& E, ^1 Z( n% B4 Y/ J$ Y. {7 Q+ Cbiggest concern was virilizing adrenal hyperplasia,+ u1 ^$ u9 w; T* Z2 ? z* S
either 21-hydroxylase deficiency or 11-β hydroxylase
* g% Z: ~. u- c0 \9 }" Qdeficiency. Those diagnoses were excluded by find-. w7 [" [4 k3 ~# p! F4 x, y
ing the normal level of adrenal steroids.) Y% Q+ h; }$ }
The diagnosis of exogenous androgens was strongly
. s; ~5 c0 I9 X7 b4 Jsuspected in a follow-up visit after 4 months because- n% S& K, O0 M3 L4 \7 l
the physical examination revealed the complete disap-8 ?9 D+ [' g5 B2 o- q
pearance of pubic hair, normal growth velocity, and+ L* D7 r% G& S* _
decreased erections. The father admitted using a testos-
; f8 y3 p. W9 Q/ W4 ^# R+ uterone gel, which he concealed at first visit. He was1 L% @1 O0 J! W8 X' ?
using it rather frequently, twice a day. The Physicians’
9 b3 ?( o" W" B cDesk Reference, or package insert of this product, gel or( [' G' v$ \0 n9 V1 {8 F, _
cream, cautions about dermal testosterone transfer to1 ~/ A) Z% r( ?7 p
unprotected females through direct skin exposure.
7 E s: ]4 C, P' |$ f) vSerum testosterone level was found to be 2 times the
2 S! r$ R5 v' y: B" X5 p7 A3 Zbaseline value in those females who were exposed to$ L( Y. d' q8 @8 s% t/ E G
even 15 minutes of direct skin contact with their male2 k' ]& ~) j' q- O D7 A4 ~6 P0 J
partners.6 However, when a shirt covered the applica-
9 R! C/ \, y5 B- ttion site, this testosterone transfer was prevented.
( q9 ]3 I# B$ M& ~Our patient’s testosterone level was 60 ng/mL,( l/ u7 x2 U8 i7 V0 i1 n
which was clearly high. Some studies suggest that
# P2 ]( w+ y0 [: bdermal conversion of testosterone to dihydrotestos-
7 q) I4 @5 h) f9 w" b4 Sterone, which is a more potent metabolite, is more J6 T$ k2 g3 k6 T; Z5 E
active in young children exposed to testosterone
& O y( F' G$ B2 f) |exogenously7; however, we did not measure a dihy-
1 Q3 u- k& f% @3 w. |1 D5 F1 Ddrotestosterone level in our patient. In addition to3 s6 u3 e( \% l) p9 U; w
virilization, exposure to exogenous testosterone in0 s/ Z/ v- z- {. t- m( i
children results in an increase in growth velocity and7 A* y9 W. ~) a! C6 M: D
advanced bone age, as seen in our patient.
" y* l* v3 R- L' ~! ]. lThe long-term effect of androgen exposure during
/ c0 r& ], _' e( @early childhood on pubertal development and final. v5 k0 [' q* c, O- W
adult height are not fully known and always remain
. _ L5 N4 m7 o4 w' ?6 U X1 U+ Ga concern. Children treated with short-term testos-/ a5 ~) n w* G5 c
terone injection or topical androgen may exhibit some2 ^9 `+ x) j+ ~
acceleration of the skeletal maturation; however, after& D! j, T3 m; Z4 V% [
cessation of treatment, the rate of bone maturation+ \, E! ] E* L! ?& L3 r1 ?
decelerates and gradually returns to normal.8,9
5 {4 Q! Z& C" d7 fThere are conflicting reports and controversy
( h% j9 o! ]9 W" T$ b0 A' {3 Uover the effect of early androgen exposure on adult% I2 q8 P7 e4 i- y
penile length.10,11 Some reports suggest subnormal" R: P/ L9 `; F, Y5 O
adult penile length, apparently because of downreg-+ G7 L" f4 R3 @4 F
ulation of androgen receptor number.10,12 However,
) R$ |2 M: I6 ~, |" vSutherland et al13 did not find a correlation between
7 |9 G+ _3 Q& t$ s1 b; Bchildhood testosterone exposure and reduced adult
$ U2 g6 O" ?1 j6 Q) e2 C0 lpenile length in clinical studies., l- |- K% H; T; K9 N
Nonetheless, we do not believe our patient is
S% Y/ ?) f7 ^7 x- Mgoing to experience any of the untoward effects from
. i9 B7 h' h7 g& Itestosterone exposure as mentioned earlier because; B( }: b, L/ e! ^. ^: Y
the exposure was not for a prolonged period of time.- y( M% H8 L3 r7 p% v: a
Although the bone age was advanced at the time of# H2 e' s- G+ L7 Q
diagnosis, the child had a normal growth velocity at
) Y$ c4 w7 R5 tthe follow-up visit. It is hoped that his final adult
% m' M9 x6 ?0 E* v: p5 L6 M) Eheight will not be affected.; E5 m; L6 d: q8 j+ F5 m |2 T$ q$ a, {
Although rarely reported, the widespread avail-
. d0 y7 b2 O2 K. J3 @# A0 s2 Aability of androgen products in our society may0 J* G* {; a9 n# ]
indeed cause more virilization in male or female
1 ^( Q' K, U; j0 _children than one would realize. Exposure to andro-4 n5 B1 H9 \! C3 n
gen products must be considered and specific ques-
5 h6 c& M) P; h( u! K9 s) A3 Ytioning about the use of a testosterone product or
3 I+ _& e5 _, D; P- A8 d2 U/ A7 dgel should be asked of the family members during
' K2 R# ?, e: q0 G% Zthe evaluation of any children who present with vir-; ^4 J7 j6 m5 i( W# v& R$ [
ilization or peripheral precocious puberty. The diag-
# n. J" T* h( K$ fnosis can be established by just a few tests and by+ @1 M. n* {" c3 p* M* m: y( f- z
appropriate history. The inability to obtain such a* h8 ~/ R3 W1 R) a( W& b% l/ J; N
history, or failure to ask the specific questions, may& ~8 {$ y+ J) Q) T/ U
result in extensive, unnecessary, and expensive4 X4 w& i" m: ?+ N& e
investigation. The primary care physician should be4 ?$ C2 b" q! s y- V" d
aware of this fact, because most of these children
G: P4 M2 i5 ?4 _8 emay initially present in their practice. The Physicians’
% P9 {# F" o1 @; Y/ BDesk Reference and package insert should also put a
- q2 R- o# `' |2 Zwarning about the virilizing effect on a male or* S" G% H: ~3 A2 E
female child who might come in contact with some-& S8 s' T0 A) V' g# M! P' k
one using any of these products.
# ]# Z ]( ^5 Z5 W/ ^References1 g1 v" Y k5 j% |1 n
1. Styne DM. The testes: disorder of sexual differentiation
0 t# ?5 Z$ ]9 ]and puberty in the male. In: Sperling MA, ed. Pediatric: C0 C7 G5 E4 c' O# G% @
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
4 v" ~( l/ f; ^7 D% T2002: 565-628.: a4 n+ |0 K+ e4 v" C
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious$ k+ b4 ^5 F6 X0 j" D
puberty in children with tumours of the suprasellar pineal
+ p& X4 E- u0 xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 z2 u2 `; K8 J) Q, pTopical Testosterone Exposure / Bhowmick et al 543
* U; O) G1 @; B u/ a& A0 Rareas: organic central precocious puberty. Acta Paediatr.( K9 t6 g% N+ L; e& z9 u0 b( ?1 P
2001;90:751-756.* V3 [# o( v' p3 V% N
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
% J; M7 q0 U' c0 i: X5 o- Q! EPediatric Endocrinology. 4th ed. New York, NY: Marcel! {2 C$ ?# I- D/ B4 [5 `+ U4 }
Dekker Inc; 2003:211-238.
) z0 X# A- s* _4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual/ S2 d' T/ g [0 ~1 w- m5 A
development in a two-year-old boy induced by topical
% r5 K1 [" P6 f4 r+ e) L Xexposure to testosterone. Pediatrics. 1999;104:e23.# T i. f' I$ S8 w; P0 ^
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of7 u* o4 P! H5 |4 u7 s
Skeletal Development of the Hand and Wrist. 2nd ed.) r! ]: E$ N& l( V, M0 r' T
Stanford, CA: Stanford University Press; 1959.
8 [( C7 t v: J3 m# n" p% N# J' S8 V6. Physicians’ Desk Reference. Androgel 1% testosterone,7 { }5 G A0 o, t
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
% S# z! y/ L& w+ V: k1 HEconomics Company, Inc; 2004:3239-3241.( }, K' g0 ]8 Z0 H
7. Klugo RC, Cerny JC. Response of micropenis to topical
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