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is a significant concern for physicians. Central
7 l, H4 e7 O6 X. b: E- g$ ~9 o y" Rprecocious puberty (CPP), which is mediated
. { m$ J- [& P% _3 A+ o+ Dthrough the hypothalamic pituitary gonadal axis, has% E; A" U( f/ E6 N6 s
a higher incidence of organic central nervous system
0 f. @) D8 B! k$ T0 C, D7 M/ Klesions in boys.1,2 Virilization in boys, as manifested& _) r/ D6 P" y2 Q! S
by enlargement of the penis, development of pubic
: V# R7 Q$ f! {. u4 q3 A% Thair, and facial acne without enlargement of testi-7 S" v! B, I& r- n* \+ M v4 S9 [
cles, suggests peripheral or pseudopuberty.1-3 We, V- B( W+ m2 m' c7 O& c
report a 16-month-old boy who presented with the
* \$ @9 Z6 a- I5 K% `enlargement of the phallus and pubic hair develop-
" H M- \! V) K: i& k% q, ~5 m1 Yment without testicular enlargement, which was due' ~, Z0 F M9 a* C
to the unintentional exposure to androgen gel used by
9 V) w" w% Y6 k, `" Q, `, [) L" m4 Rthe father. The family initially concealed this infor-+ E) C7 N" D- W+ P9 l
mation, resulting in an extensive work-up for this
) o4 L0 Y, \. vchild. Given the widespread and easy availability of
& x- z) _3 [# jtestosterone gel and cream, we believe this is proba-2 T1 b4 b. h- s% I
bly more common than the rare case report in the
# g3 |; C* [8 h7 y4 x- I: Kliterature.4" X, T8 A4 B% Q
Patient Report8 {* \; Q$ P+ i+ G- b( d
A 16-month-old white child was referred to the; v8 X' W. T6 E4 b% ^
endocrine clinic by his pediatrician with the concern
( y9 B0 f# U. [* l6 F( Q* O/ Tof early sexual development. His mother noticed% I1 U. M! ~3 G9 _2 k! D! J( e# j
light colored pubic hair development when he was
# h) p8 h' i( a. K2 M% n. O, RFrom the 1Division of Pediatric Endocrinology, 2University of
/ i9 v$ c6 r. @South Alabama Medical Center, Mobile, Alabama.
" f' R$ y% Q9 p/ wAddress correspondence to: Samar K. Bhowmick, MD, FACE,) R2 }2 o4 O& u' X/ P7 D- {8 z1 J
Professor of Pediatrics, University of South Alabama, College of: @6 B4 I/ z2 V: L4 ]/ H& Y; i
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
7 [: E$ @* V9 M5 |9 z0 ^3 }3 Oe-mail: [email protected].5 w. q9 \, Z T5 G. O" k# `
about 6 to 7 months old, which progressively became9 Z8 _6 |4 |4 r$ Z6 D; Q
darker. She was also concerned about the enlarge-
. I$ \8 N2 } f* P: ]# {. t" ^ment of his penis and frequent erections. The child
& T$ s: N% r5 B% awas the product of a full-term normal delivery, with+ j9 z, C$ W# f& _' J
a birth weight of 7 lb 14 oz, and birth length of
; c9 \: I" x! p$ z/ j/ r5 d0 u20 inches. He was breast-fed throughout the first year
8 W9 {! f# n& e9 Hof life and was still receiving breast milk along with
, Q+ A$ x9 O7 n: Wsolid food. He had no hospitalizations or surgery,
: r; J2 L' o2 c4 u0 Y+ @and his psychosocial and psychomotor development
! e4 x; _- P8 J" K) uwas age appropriate.: h# \8 A |2 K- a7 I, ?
The family history was remarkable for the father,
, r2 P* b$ o- rwho was diagnosed with hypothyroidism at age 16,+ d7 q4 o$ B: E% s1 M
which was treated with thyroxine. The father’s; I S2 x6 t- `
height was 6 feet, and he went through a somewhat# l$ t/ Y6 K" W5 N* C. o
early puberty and had stopped growing by age 14.. }# g+ R8 m6 M* T1 z( _$ P
The father denied taking any other medication. The
; m0 b6 b. |, { }child’s mother was in good health. Her menarche& W/ E% Y5 Y: a$ ^& T2 x& e
was at 11 years of age, and her height was at 5 feet( y! \# H! m8 k# q. T
5 inches. There was no other family history of pre-2 G; J7 G9 _% @8 M) T6 ^
cocious sexual development in the first-degree rela-
$ J) |, i# t8 q# S/ a8 ]tives. There were no siblings.
V( a+ F) |, G$ G8 tPhysical Examination( [ S$ g) X! Q( a5 U& Q; z$ z
The physical examination revealed a very active,
3 ?/ _7 j8 u8 e# ]1 o* I( |playful, and healthy boy. The vital signs documented
- b: u( N/ R/ r' I$ Q1 Ca blood pressure of 85/50 mm Hg, his length was
/ ?3 g r) K7 _& u1 a90 cm (>97th percentile), and his weight was 14.4 kg
+ U( k- R! q% `+ T(also >97th percentile). The observed yearly growth/ @# r% M+ L' g" f; t% Q8 J
velocity was 30 cm (12 inches). The examination of, q/ U: f, h6 V( H. v! z
the neck revealed no thyroid enlargement./ T; \* J8 v+ J" X% I, z9 z
The genitourinary examination was remarkable for
4 ?/ J3 k( F- I5 A( L- Oenlargement of the penis, with a stretched length of E) i8 `# P6 _0 _, E( ] K: m
8 cm and a width of 2 cm. The glans penis was very well
- g! H& L5 x; R, `2 N5 l7 Bdeveloped. The pubic hair was Tanner II, mostly around
# s5 ]: m. y6 x$ o540* H) _7 k* t' X! ^9 o3 _
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% M1 d/ A* @! b3 I, V4 g8 Z
the base of the phallus and was dark and curled. The: r. R4 ?0 Z/ o% b" g
testicular volume was prepubertal at 2 mL each.; X! f4 G" d5 G4 {$ |) E) |
The skin was moist and smooth and somewhat+ v5 y/ Z4 e6 r" I+ K: ]
oily. No axillary hair was noted. There were no
6 l' `! b2 ]( M7 [) `/ ~' Tabnormal skin pigmentations or café-au-lait spots.
. C! E+ R+ B3 D1 C3 e& u+ f: zNeurologic evaluation showed deep tendon reflex 2+
" B/ b0 g4 K7 I1 l& d3 r3 p# s% l) \+ |bilateral and symmetrical. There was no suggestion
) ~% ^6 z$ i! vof papilledema.
1 F6 M3 ~$ v* L, RLaboratory Evaluation
- u3 k- w' L C1 H! |6 u1 eThe bone age was consistent with 28 months by
$ _2 N; b4 M" O0 n+ _using the standard of Greulich and Pyle at a chrono-5 `. L6 o& v$ Z" I7 s* t
logic age of 16 months (advanced).5 Chromosomal
7 O% c& f/ p0 |# lkaryotype was 46XY. The thyroid function test
+ A+ w3 S; |# D+ I+ O dshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
" q7 v' ]2 s- l. t2 @: O0 clating hormone level was 1.3 µIU/mL (both normal).
. K! j$ K1 c; H A' }4 gThe concentrations of serum electrolytes, blood
9 Z2 ~% a$ O' \ \6 ~+ Y8 o1 Durea nitrogen, creatinine, and calcium all were( F$ Q) j- B& S; b3 X4 M7 K$ }
within normal range for his age. The concentration; {' X) a& Z1 T/ U; a2 E
of serum 17-hydroxyprogesterone was 16 ng/dL {5 l8 F( ]5 A
(normal, 3 to 90 ng/dL), androstenedione was 20, t+ i) h4 T5 x; e9 _, u
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
- x( n) r: I) D: g7 u: B' bterone was 38 ng/dL (normal, 50 to 760 ng/dL),% j% d- _8 O* l/ o) m, ~
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
9 s+ R Z/ _/ N( C* w6 J# X49ng/dL), 11-desoxycortisol (specific compound S)9 ]0 d1 X1 C& Q- C+ M5 y
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
8 m( }% F. F- @2 e' I$ h! D2 V5 Ytisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total* V1 s s: C+ W
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
/ p" z5 d9 q2 h* K$ Q+ {and β-human chorionic gonadotropin was less than9 ]0 B( A+ O3 u3 G* w. T' Y
5 mIU/mL (normal <5 mIU/mL). Serum follicular4 h; m3 X5 S# H5 }+ E
stimulating hormone and leuteinizing hormone
6 v; q( b! Y1 M) Hconcentrations were less than 0.05 mIU/mL
- L$ U$ \- Y- a: t9 r! e' m! m; a5 J(prepubertal).7 }4 c; [: `+ Y! q
The parents were notified about the laboratory x$ ]& d# T% ]- y
results and were informed that all of the tests were) B$ H+ m6 t. ]: |! G4 j: L& W) c
normal except the testosterone level was high. The
], T: {; j4 p5 x a& v9 r8 d2 H rfollow-up visit was arranged within a few weeks to+ u( g$ T4 Y0 f. N
obtain testicular and abdominal sonograms; how-/ c! U) n, a4 r1 F9 _, V
ever, the family did not return for 4 months./ s: Y+ @' }' p) d1 e0 ~1 r) z
Physical examination at this time revealed that the
% V; v8 n% m$ g# E9 |/ lchild had grown 2.5 cm in 4 months and had gained
* L7 P- e. P2 O. {: p, ]& T2 kg of weight. Physical examination remained8 f; G: @2 |" V: h2 \0 y3 Q
unchanged. Surprisingly, the pubic hair almost com-
/ c, } s# ]1 |" V# ]pletely disappeared except for a few vellous hairs at2 A' R5 ?. f8 H* Z
the base of the phallus. Testicular volume was still 2
+ T# L8 Y# P; x; `# A3 g! YmL, and the size of the penis remained unchanged.
W, S4 u' r: ZThe mother also said that the boy was no longer hav-
( V- F( _4 `. U6 n# I8 Ving frequent erections." x8 F' W+ [; |
Both parents were again questioned about use of9 G7 y" O0 p, K# P
any ointment/creams that they may have applied to
3 |) k; l& Z, L% P W$ ~5 f7 Dthe child’s skin. This time the father admitted the" \2 A5 g/ W4 u
Topical Testosterone Exposure / Bhowmick et al 541& \7 p% P& t0 O& E' J* ~
use of testosterone gel twice daily that he was apply-
7 N& |' ?1 g0 @ing over his own shoulders, chest, and back area for3 k( K9 j$ g; [* i* {0 p) ^
a year. The father also revealed he was embarrassed$ ~" A% V# q8 _& |$ L1 D
to disclose that he was using a testosterone gel pre-
. ~' }" u' |6 |9 u: k$ hscribed by his family physician for decreased libido
* B7 p+ ]- f h6 d1 o6 H9 msecondary to depression.
U8 X; m, a' `7 p: f% L6 D1 E+ qThe child slept in the same bed with parents.2 b7 J2 [5 h, M) U! k5 I' Y2 h
The father would hug the baby and hold him on his
6 u% I. y0 ~7 A- zchest for a considerable period of time, causing sig-
! N: {8 X4 Q2 K3 ^ p k1 E: M' Onificant bare skin contact between baby and father.. \& ^+ p7 f" u- B- R7 X
The father also admitted that after the phone call,
3 H0 N" I/ O" u8 w# X4 o% z' Jwhen he learned the testosterone level in the baby# K5 U! g$ n0 h) t( v7 b
was high, he then read the product information
+ I! I- ^$ O4 l# M8 s- ~" K- Apacket and concluded that it was most likely the rea- g3 Q0 _, D- i4 K0 o
son for the child’s virilization. At that time, they( T1 q, G, `2 J: Z
decided to put the baby in a separate bed, and the
, m8 D( g. Z. z' ^: bfather was not hugging him with bare skin and had
2 c5 [' V, o. ^9 ]0 Zbeen using protective clothing. A repeat testosterone$ K5 J/ y+ u( G; L0 ^" z
test was ordered, but the family did not go to the
4 m* S1 z1 u) ]9 hlaboratory to obtain the test.
* z+ j. K& Z. }- {3 uDiscussion* u0 v. E; ]3 j1 F, s1 j
Precocious puberty in boys is defined as secondary
' ]8 G+ P' X- I9 Esexual development before 9 years of age.1,4 E- C: W8 ? v% n) ^- |, z
Precocious puberty is termed as central (true) when
6 v P5 F& X$ k. Oit is caused by the premature activation of hypo-
, B9 G# i1 a5 r- i9 Y/ m- uthalamic pituitary gonadal axis. CPP is more com-
* z! k# o0 G. i* c7 m7 H9 p% lmon in girls than in boys.1,3 Most boys with CPP: O1 {3 b8 k; I+ c; q5 e. {- J( x0 h
may have a central nervous system lesion that is
9 C0 d/ m% Z* s" P5 mresponsible for the early activation of the hypothal-$ I5 m& ]! B+ N/ Q
amic pituitary gonadal axis.1-3 Thus, greater empha-
# \3 O9 e: ] @# t$ h6 bsis has been given to neuroradiologic imaging in
( }7 K; B2 @4 U, Mboys with precocious puberty. In addition to viril-9 z. L& c& i' i7 T& v0 E9 }0 v" M% ~4 A
ization, the clinical hallmark of CPP is the symmet-2 O; ~$ e6 y) b ]
rical testicular growth secondary to stimulation by- v+ \+ K1 U) [+ b5 L+ z
gonadotropins.1,3, i* k. m% K7 u2 j9 ]* B
Gonadotropin-independent peripheral preco-
8 a, n" j0 J4 _' ]cious puberty in boys also results from inappropriate- c+ w0 M, D: B/ }/ e6 `% U2 k
androgenic stimulation from either endogenous or
+ `) J+ @ s" n# U, P5 Wexogenous sources, nonpituitary gonadotropin stim-$ O ^" y9 M+ t* z
ulation, and rare activating mutations.3 Virilizing" b) K) G; n+ b3 l1 }/ d3 m* [) }
congenital adrenal hyperplasia producing excessive! b! ]% q- Q- X
adrenal androgens is a common cause of precocious' Y8 s/ {0 v, c
puberty in boys.3,4
# B& ~- S0 L+ ]$ D" g4 SThe most common form of congenital adrenal$ [4 o! v* Z8 N5 q
hyperplasia is the 21-hydroxylase enzyme deficiency.* t5 y- r1 p8 o: G, @. O* f
The 11-β hydroxylase deficiency may also result in
9 L4 j, t+ q$ W6 K0 u3 l8 A( wexcessive adrenal androgen production, and rarely,) {" o) _* |( G' B; h# I4 Z
an adrenal tumor may also cause adrenal androgen1 | v& d5 _( e5 X. o
excess.1,3
+ Y3 x/ R# T, L; B6 c Pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- e9 u6 L$ u$ J/ @
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007$ _7 G( D6 ?: S$ h6 @* P
A unique entity of male-limited gonadotropin-9 X9 e0 x5 B- {: P* q& Y' Z
independent precocious puberty, which is also known
6 @# l1 ~& `) _+ J( |, Ias testotoxicosis, may cause precocious puberty at a
8 t/ _3 y6 H* ]6 ~very young age. The physical findings in these boys! o/ `$ t7 b$ b3 F' f
with this disorder are full pubertal development,
3 w2 p' @9 I1 y$ o. r: w% nincluding bilateral testicular growth, similar to boys# R' i6 x- B, W( R1 c) F- ]
with CPP. The gonadotropin levels in this disorder
/ ~1 c2 o4 L% t6 p, oare suppressed to prepubertal levels and do not show
) i+ E/ p* s' ^* u; ppubertal response of gonadotropin after gonadotropin-' N5 d/ j; B c0 W8 M3 H' m1 A
releasing hormone stimulation. This is a sex-linked9 B# M- r1 _+ w# y1 s) w! W3 A
autosomal dominant disorder that affects only+ c- {6 O# s9 g. a5 o& }1 C& c
males; therefore, other male members of the family8 u5 t/ H: D3 i) W3 o( E
may have similar precocious puberty.3
; x$ v3 n9 a X F( WIn our patient, physical examination was incon-. t4 j0 E% P* U6 n
sistent with true precocious puberty since his testi-8 Q8 k! u* S9 R4 t
cles were prepubertal in size. However, testotoxicosis
) m9 C, u# B4 |2 p2 F) iwas in the differential diagnosis because his father r/ _# v# }3 K% A
started puberty somewhat early, and occasionally,
1 g. D8 F8 _% F0 V- s% Ltesticular enlargement is not that evident in the0 T& F6 C6 S/ Y6 p
beginning of this process.1 In the absence of a neg-" s, e8 q1 R. o% u' ~% Y1 K# i
ative initial history of androgen exposure, our
. E( e7 ^: ]# j& ybiggest concern was virilizing adrenal hyperplasia,
) j; O4 L3 @1 Teither 21-hydroxylase deficiency or 11-β hydroxylase
! W9 Z8 [8 F) |$ l, V7 Adeficiency. Those diagnoses were excluded by find-6 `- J2 z, u: c: C. Y2 R/ Y8 A0 |
ing the normal level of adrenal steroids.2 S& U% `, Q/ @" I$ |* m
The diagnosis of exogenous androgens was strongly
) d2 ?5 }. M9 D/ xsuspected in a follow-up visit after 4 months because% { I2 Q, ^$ i' r- a
the physical examination revealed the complete disap-
5 r1 C: Z j& m3 [5 @9 Vpearance of pubic hair, normal growth velocity, and
( D3 m" x; V2 V2 adecreased erections. The father admitted using a testos-
( U y7 e, f; m! `" Z2 Fterone gel, which he concealed at first visit. He was1 F$ o, r$ o1 Q5 a6 V
using it rather frequently, twice a day. The Physicians’% E% I5 V6 S* C) a
Desk Reference, or package insert of this product, gel or! B" d4 u1 R i( J, s
cream, cautions about dermal testosterone transfer to, `3 R% s0 M1 l0 K% K' Y
unprotected females through direct skin exposure.
2 f K! K: k( q8 g, R$ S7 ASerum testosterone level was found to be 2 times the
8 X" N, r; j8 e/ Pbaseline value in those females who were exposed to
' r/ Y* t3 F \4 y t( K* {8 s# a, Weven 15 minutes of direct skin contact with their male
( P. D4 m+ S# d/ ppartners.6 However, when a shirt covered the applica-4 F4 y9 \8 v: Z U0 Z
tion site, this testosterone transfer was prevented.
, b; x: _! L% \" DOur patient’s testosterone level was 60 ng/mL,
' r% B! S( _1 f0 g/ x0 }/ fwhich was clearly high. Some studies suggest that; x+ \0 t! H k! r h; Y E2 }9 D) `
dermal conversion of testosterone to dihydrotestos-( X" U, y9 s2 C; B
terone, which is a more potent metabolite, is more4 B4 {! z% D/ ^
active in young children exposed to testosterone
' T1 {6 r9 v) Q' W7 K: Aexogenously7; however, we did not measure a dihy-
, B) e1 F* @1 ^, Y- }' v( j; Odrotestosterone level in our patient. In addition to7 \/ C. }$ `; c
virilization, exposure to exogenous testosterone in
* x- V8 X% [! ^) y: Gchildren results in an increase in growth velocity and
$ b2 Y* L4 o |advanced bone age, as seen in our patient.4 h0 |5 ^) M, W
The long-term effect of androgen exposure during
* o4 l f* ^5 `& fearly childhood on pubertal development and final6 W% {3 u; Y' {/ j7 |: q
adult height are not fully known and always remain2 I% K- P i/ W6 X6 U7 x
a concern. Children treated with short-term testos-
1 r$ \6 x6 d1 R" ]9 {terone injection or topical androgen may exhibit some
0 W- y& ^# @: h$ Sacceleration of the skeletal maturation; however, after
d" ?4 b6 t0 W' c" K, }; }/ dcessation of treatment, the rate of bone maturation1 u% s9 a& h5 s0 P& R2 B$ V
decelerates and gradually returns to normal.8,9
, n, e1 t+ v, u! W( z8 z6 ?There are conflicting reports and controversy
9 z' H( E0 A0 H5 q+ @5 @+ Uover the effect of early androgen exposure on adult+ x8 L! u/ D5 @6 p4 S
penile length.10,11 Some reports suggest subnormal
4 w0 ^( R% v- b; ladult penile length, apparently because of downreg-, @& a1 z+ m7 X0 S; P/ t
ulation of androgen receptor number.10,12 However,
' e0 t+ R* i* T4 Z% G& M, O3 XSutherland et al13 did not find a correlation between, `% d2 V6 u0 N0 o! ^# Y1 N' p
childhood testosterone exposure and reduced adult4 i& ~. C3 t% Y) Y
penile length in clinical studies.0 L' ]( J o! h- l0 K- r% y) ]
Nonetheless, we do not believe our patient is L9 z7 c2 ^, n" T: x1 s
going to experience any of the untoward effects from! L+ M1 {0 O, `2 l+ F+ {& ~
testosterone exposure as mentioned earlier because
+ b4 {( F+ q& y$ f3 K T6 s1 @the exposure was not for a prolonged period of time.
+ D: {& N. a4 CAlthough the bone age was advanced at the time of
9 v* k* C3 X- m& _% J, rdiagnosis, the child had a normal growth velocity at
9 D% [/ | H8 Bthe follow-up visit. It is hoped that his final adult
# [* }$ C0 S, O. vheight will not be affected.3 u( d3 c: z. V$ f4 S
Although rarely reported, the widespread avail-
1 x3 o4 z2 n& S! R8 @' N, k( m; jability of androgen products in our society may
! G, O/ u" B' C/ ?: Lindeed cause more virilization in male or female2 `5 a6 ^5 E2 a, S- d& E
children than one would realize. Exposure to andro-
0 w/ z* K: c) t) I3 E8 Y/ qgen products must be considered and specific ques-% n8 @# @2 D% A f" v. g# R
tioning about the use of a testosterone product or H0 U/ \6 I+ M$ N6 a
gel should be asked of the family members during
( x( I0 r$ _7 t2 `7 P. W% t$ kthe evaluation of any children who present with vir-
$ P# r& c2 g3 D2 G* S/ ~, hilization or peripheral precocious puberty. The diag-! v% a# l1 t6 ~8 C+ c3 P; y
nosis can be established by just a few tests and by
. T5 ]; u' [' I8 [appropriate history. The inability to obtain such a
$ a/ s5 @- l9 u) K$ Y, Q) x5 zhistory, or failure to ask the specific questions, may; f) ]' ^0 L! Y, m
result in extensive, unnecessary, and expensive% Y h$ H2 T) W7 Z0 n7 F
investigation. The primary care physician should be
: r; f) L! h; a/ m: z& }+ Z; e; j- ^aware of this fact, because most of these children
, k4 p5 T5 _- C( N; [" s1 smay initially present in their practice. The Physicians’
9 F) D( W/ B2 a2 ]' _* RDesk Reference and package insert should also put a* C( g. P( W2 u/ _
warning about the virilizing effect on a male or8 a* c, ?! o5 A5 F& {8 k7 }: @% ^
female child who might come in contact with some-
6 A6 ^' d0 u' {8 qone using any of these products.
z$ ^, Y5 r! \3 Y; C& WReferences# }2 G; B) `) M& \+ y; \
1. Styne DM. The testes: disorder of sexual differentiation4 v4 s( A' |" Q* T m- i( F
and puberty in the male. In: Sperling MA, ed. Pediatric1 [0 ]0 G: r7 I% F: ]! Q
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;+ [$ Y. Q' }+ j' o% h
2002: 565-628./ ~+ p. o* [& k8 y. I
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
% l/ I2 Y' u- a: C1 j$ ?0 Ipuberty in children with tumours of the suprasellar pineal+ o( `" d0 D0 w
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 h2 z- s. A; e* {
Topical Testosterone Exposure / Bhowmick et al 543" _3 N5 b) [. w: }& ]. e
areas: organic central precocious puberty. Acta Paediatr.- x! s+ b7 M: E z
2001;90:751-756.7 P' g+ P8 {6 n& X
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
! d' H/ q# R5 K9 V& xPediatric Endocrinology. 4th ed. New York, NY: Marcel3 g" E O- I% l* u- }# H/ |7 J
Dekker Inc; 2003:211-238.
5 Q9 h3 j; Z9 h, l4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual( r6 n, J! S! G/ m; K2 O0 V
development in a two-year-old boy induced by topical; z- [2 d4 A1 B( v
exposure to testosterone. Pediatrics. 1999;104:e23.& U' z; b0 U8 R n7 g8 d
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
% |+ ` c4 t0 w4 b! N; f: t- g S* c! \1 @! GSkeletal Development of the Hand and Wrist. 2nd ed.
( z f' U5 e0 y0 ~! yStanford, CA: Stanford University Press; 1959.1 p ?0 F1 s: H* F- O' A4 L/ P, R
6. Physicians’ Desk Reference. Androgel 1% testosterone,
, R$ S* x! I, f. @: S' E6 K8 X) B9 BUnimed Pharmaceutical Inc. Montvale, NJ: Medical
8 v8 b7 s6 V, b6 \2 G$ qEconomics Company, Inc; 2004:3239-3241.
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