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is a significant concern for physicians. Central
; U Y) F. F& C+ Z) ]" Nprecocious puberty (CPP), which is mediated. r5 g( Y. W( z" B- P) M
through the hypothalamic pituitary gonadal axis, has
; P" j$ {9 h! }& n- Y+ X, u) ~5 ba higher incidence of organic central nervous system
) J0 k4 z5 w7 M0 `lesions in boys.1,2 Virilization in boys, as manifested
1 a, o8 h) l |& wby enlargement of the penis, development of pubic
* j6 W- m. B. H/ p( b$ Khair, and facial acne without enlargement of testi-
% Q7 q Z$ j2 C4 d7 tcles, suggests peripheral or pseudopuberty.1-3 We
3 n6 a" r" y; J# H5 T/ Y+ ^, vreport a 16-month-old boy who presented with the* b0 q, D4 J. V
enlargement of the phallus and pubic hair develop-( B& b- V! a4 t7 z% D+ P9 Y$ R
ment without testicular enlargement, which was due
9 A4 ^6 H0 Y: h. ito the unintentional exposure to androgen gel used by
6 `4 B- o0 C8 b3 Z6 O/ Lthe father. The family initially concealed this infor-
8 _9 o) U% k- m, i+ G Q rmation, resulting in an extensive work-up for this1 a2 m$ z% ]% T2 |2 C$ @
child. Given the widespread and easy availability of& k, Q+ S; f6 O7 a) m3 N% a. y
testosterone gel and cream, we believe this is proba-" z1 e/ W9 [5 W9 f& `3 ?
bly more common than the rare case report in the
' w; c+ d# t) t7 Tliterature.4; ?; W/ N8 q/ y8 A' h
Patient Report
9 z7 k- c% o; z [; m7 CA 16-month-old white child was referred to the
3 {+ k& O4 q& q# i5 ^endocrine clinic by his pediatrician with the concern& U1 Q& X0 l: M* M
of early sexual development. His mother noticed
/ I: N/ }9 ~8 H$ R: e2 Mlight colored pubic hair development when he was
( N# \; f3 x- ]% u) yFrom the 1Division of Pediatric Endocrinology, 2University of
0 W. P6 ?, L% bSouth Alabama Medical Center, Mobile, Alabama.6 p% y2 K4 f" t
Address correspondence to: Samar K. Bhowmick, MD, FACE,4 ?! O. t& _3 _- |. L/ u+ }$ b
Professor of Pediatrics, University of South Alabama, College of
$ j% N6 R/ f4 d0 R. eMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;2 ~6 X v9 n7 H% G8 [
e-mail: [email protected].
) i0 @1 B; d4 Z$ rabout 6 to 7 months old, which progressively became
! N( i) _* e1 a) o# ddarker. She was also concerned about the enlarge-
7 @" t, U7 Z# s6 B6 q8 Z: dment of his penis and frequent erections. The child6 u5 s5 s; _8 x: m2 A: Z+ a
was the product of a full-term normal delivery, with R8 p: J, r' u8 G
a birth weight of 7 lb 14 oz, and birth length of2 G- u; F4 G2 A4 @1 f
20 inches. He was breast-fed throughout the first year
Q8 P0 u V0 @6 T* |1 lof life and was still receiving breast milk along with; N) O# E6 q3 b/ R& k4 C) V
solid food. He had no hospitalizations or surgery,( S: f; y9 q7 ^5 a
and his psychosocial and psychomotor development6 d% E. S0 o3 i7 q! }
was age appropriate.7 v' {; T c# O4 F3 s
The family history was remarkable for the father,
0 r: l; l: g5 e8 Vwho was diagnosed with hypothyroidism at age 16,
( E, K6 v0 Q3 d. S# m: D9 o4 c# F% \which was treated with thyroxine. The father’s. v+ L$ V2 N! s8 x. g( v. Z
height was 6 feet, and he went through a somewhat
- o8 z# L' j3 x. ]early puberty and had stopped growing by age 14.* R* z! f' y6 C" K7 D* O3 z4 s1 r
The father denied taking any other medication. The
" F4 }: ~+ H f% _child’s mother was in good health. Her menarche3 P5 ^5 @/ [1 s; A$ N
was at 11 years of age, and her height was at 5 feet% q$ V4 w; p! w" P/ Y( e
5 inches. There was no other family history of pre-
, ]" s/ K: G1 r# @2 f8 b6 ccocious sexual development in the first-degree rela-! c0 R9 f, k7 S* N0 [% F
tives. There were no siblings.; [4 I$ |5 C! \( C) R4 S+ E
Physical Examination6 o% [4 c P& u u6 ?. d8 ^
The physical examination revealed a very active,
+ Y/ [: p) `; ^! K0 l, Splayful, and healthy boy. The vital signs documented
. P: p. j% j' C0 R4 H9 qa blood pressure of 85/50 mm Hg, his length was
7 A8 R s7 k0 o2 N7 ^90 cm (>97th percentile), and his weight was 14.4 kg
, Y- l) m1 u8 A8 n. N(also >97th percentile). The observed yearly growth+ x' S5 D4 `) d5 o) d" m) G% {
velocity was 30 cm (12 inches). The examination of
, c! A7 l3 [0 G& v8 nthe neck revealed no thyroid enlargement.6 v6 _/ j9 ?9 F% ?9 m% ~2 S9 X
The genitourinary examination was remarkable for2 Q, ^* m( x) N! e' [8 Z
enlargement of the penis, with a stretched length of1 }& }) }) C$ `" b
8 cm and a width of 2 cm. The glans penis was very well
- I# b& C3 p' N, @1 Wdeveloped. The pubic hair was Tanner II, mostly around
$ O# I6 h- g9 K3 H: p) |; Y( k540
; t- O, p3 z7 |$ ~( Sat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from0 f7 I) B6 m; }4 u
the base of the phallus and was dark and curled. The
/ i0 G2 C# y, I0 @3 B) i% Otesticular volume was prepubertal at 2 mL each." P/ o+ s" D' V6 ]+ y* c4 c
The skin was moist and smooth and somewhat
1 Z& j/ d7 X+ F7 u' ioily. No axillary hair was noted. There were no2 R4 N6 B' m! p
abnormal skin pigmentations or café-au-lait spots.8 m5 Y* ^* m. i* M* [3 _* D7 s% i
Neurologic evaluation showed deep tendon reflex 2+6 F; x4 K, y& {( }
bilateral and symmetrical. There was no suggestion# @1 u6 G& l# L9 D. c& I3 S
of papilledema.
) X- j( `( e7 W" R- e' i# S \Laboratory Evaluation8 c5 N3 C$ n/ r% z1 x
The bone age was consistent with 28 months by! N( |# s$ n- b4 g& o v" M
using the standard of Greulich and Pyle at a chrono-+ ]# a, g' P0 C% g; k1 S
logic age of 16 months (advanced).5 Chromosomal2 k( r- [! L0 c. Z6 O( B
karyotype was 46XY. The thyroid function test7 {' q4 x7 O/ @+ Z+ h9 Z- \6 d( _$ a2 G
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
( E; W( L" w8 llating hormone level was 1.3 µIU/mL (both normal).3 G# }& ]8 K9 U7 J
The concentrations of serum electrolytes, blood: a# U: t2 }$ A! {" q _$ y! c
urea nitrogen, creatinine, and calcium all were( [$ O& `0 [3 x) A4 ]1 a
within normal range for his age. The concentration! z n9 J$ m0 r8 c3 ]! A
of serum 17-hydroxyprogesterone was 16 ng/dL+ E7 W: _. h3 m7 `3 S2 t% @3 G
(normal, 3 to 90 ng/dL), androstenedione was 20( s2 ], ?1 r4 R4 W- v6 B
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-" Q0 t/ }1 c1 j# d$ v
terone was 38 ng/dL (normal, 50 to 760 ng/dL),: Z8 u- n5 w" I7 H+ I' @* A
desoxycorticosterone was 4.3 ng/dL (normal, 7 to& d6 x8 A! ^4 j' I# [) [! T
49ng/dL), 11-desoxycortisol (specific compound S)5 m" j' V: D y& p
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-. J$ Y G a |2 W0 d; R- h- s
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total) |3 t9 Z- g1 f3 s
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),4 M- \/ p( Z* z# S. k- e' j+ y' I- f9 B
and β-human chorionic gonadotropin was less than
% l8 D7 F0 q) M- f4 c& e5 mIU/mL (normal <5 mIU/mL). Serum follicular
% y8 |5 O' |( qstimulating hormone and leuteinizing hormone8 g- e6 u& t9 B' Z& V2 m0 }$ K: w
concentrations were less than 0.05 mIU/mL
1 G9 ~! j- O8 r3 ^9 s(prepubertal).
) O0 I* n, V. A3 p5 P6 N& ?The parents were notified about the laboratory, A4 H6 |# g) q2 K
results and were informed that all of the tests were4 e* r7 j5 Z+ Z( A5 [. d# m
normal except the testosterone level was high. The' {! ]! y3 D: E$ S3 N% Z
follow-up visit was arranged within a few weeks to; W. c, C1 u% A9 r% g! \" U
obtain testicular and abdominal sonograms; how-
* L8 B" i4 ?5 w* K9 bever, the family did not return for 4 months.' u9 b# v1 a1 H1 m. j
Physical examination at this time revealed that the
" E- B) v r& @" W( H- _* achild had grown 2.5 cm in 4 months and had gained! p$ V |2 @' O* q. ^. \, H% c2 Q
2 kg of weight. Physical examination remained# d* c* @- d, G. ~" T
unchanged. Surprisingly, the pubic hair almost com-, u0 E$ G0 N" c
pletely disappeared except for a few vellous hairs at( H1 x; q2 T4 B, `
the base of the phallus. Testicular volume was still 2; C/ f; F0 E C. c! M# ~
mL, and the size of the penis remained unchanged.
! \$ Q2 S! Y2 k6 IThe mother also said that the boy was no longer hav-% Z+ y/ e% a! y& P
ing frequent erections.
6 q' _8 D' @2 w: R3 Z+ v9 WBoth parents were again questioned about use of# C+ Y' J% W4 t. U
any ointment/creams that they may have applied to
/ L) B2 @7 e" t. [9 B3 J9 bthe child’s skin. This time the father admitted the0 h: F5 R$ i- X( Q' ]
Topical Testosterone Exposure / Bhowmick et al 541
6 W6 a3 @! J$ b( ^1 G# Huse of testosterone gel twice daily that he was apply-) L: H! m( S; W" F/ Z1 z
ing over his own shoulders, chest, and back area for
& i# S/ x0 u( _8 e; s" \( ]* g6 r) Ha year. The father also revealed he was embarrassed- p$ r9 ~# S O4 r0 h5 F( }. @
to disclose that he was using a testosterone gel pre-. I/ A. L) j, c9 h' a* k
scribed by his family physician for decreased libido
# O! U* d5 S, Hsecondary to depression.
( i3 X) P2 w8 i0 DThe child slept in the same bed with parents.4 F, k# x( B* U. X& w
The father would hug the baby and hold him on his
. @, ?, E1 V9 uchest for a considerable period of time, causing sig-
$ k9 O; A/ `9 j4 Jnificant bare skin contact between baby and father.
, @& ]6 O3 f+ A' k/ x! H NThe father also admitted that after the phone call,2 W8 n+ U! l* z! C( z7 p, M
when he learned the testosterone level in the baby! b# m; |/ {, a- |; ~+ Z: T8 a9 F
was high, he then read the product information M l- Q/ t: y3 _0 Y7 u \
packet and concluded that it was most likely the rea-' ^0 ^! }( c1 P/ y2 l# C: t. X) W
son for the child’s virilization. At that time, they7 e. l# l6 S' W5 H, M- u
decided to put the baby in a separate bed, and the
w, v. ~) m; Q) kfather was not hugging him with bare skin and had
2 @1 S' |2 ~3 [- u8 R6 rbeen using protective clothing. A repeat testosterone
& m, }: i1 l8 K- ^& y3 Y p3 c" Y. C; Etest was ordered, but the family did not go to the! M: g5 l: u3 U: ?4 }7 N' b8 _
laboratory to obtain the test.1 r: k! z# z4 M4 c
Discussion8 Z! X N x1 k \2 D/ o; b. [
Precocious puberty in boys is defined as secondary2 c6 }- j6 ~3 H$ e& I4 M
sexual development before 9 years of age.1,4
& w3 J9 v+ c D( K+ z6 YPrecocious puberty is termed as central (true) when% k6 q, Z* P n; n4 ]
it is caused by the premature activation of hypo-, e ~% e% n9 T; V0 j5 p4 Z
thalamic pituitary gonadal axis. CPP is more com-! R H. g2 C- G# e3 D
mon in girls than in boys.1,3 Most boys with CPP
9 c" t9 i( I+ q( F1 H: N1 Rmay have a central nervous system lesion that is
; C4 s, ^; d( C% u6 p1 ^responsible for the early activation of the hypothal-
& V& e0 k# D$ U6 m# m8 |6 lamic pituitary gonadal axis.1-3 Thus, greater empha-0 T l f& e5 Z% B4 H
sis has been given to neuroradiologic imaging in
& b) U9 j. x7 N- b0 U! \/ ~boys with precocious puberty. In addition to viril-' F: d3 D# m# T: M" r
ization, the clinical hallmark of CPP is the symmet-
6 A8 N4 ]6 X3 r: Q, [rical testicular growth secondary to stimulation by7 Y3 b3 ^7 {/ M6 S4 s
gonadotropins.1,3, U4 k% @; I" p
Gonadotropin-independent peripheral preco-
2 y2 w) P r) c7 y! H9 Z$ z8 ncious puberty in boys also results from inappropriate2 B4 X4 |: C" r, {7 o
androgenic stimulation from either endogenous or1 z6 y6 u9 v* t% S- O) g0 O
exogenous sources, nonpituitary gonadotropin stim-
# a. O8 p7 r. i! G8 N2 nulation, and rare activating mutations.3 Virilizing9 t { o! {, X) E4 G
congenital adrenal hyperplasia producing excessive
. P6 n- |8 f9 V7 Y) Tadrenal androgens is a common cause of precocious
: Z+ L9 s: {& r* X7 Epuberty in boys.3,4% j& a4 k7 `4 N
The most common form of congenital adrenal! q$ V( P: X" G" y( o
hyperplasia is the 21-hydroxylase enzyme deficiency.
) q4 @ H$ B! |( g& b9 AThe 11-β hydroxylase deficiency may also result in
5 J# d+ s$ g; F! D# lexcessive adrenal androgen production, and rarely,
! L" ]8 z- W1 q6 [$ @$ }an adrenal tumor may also cause adrenal androgen
5 d3 H& ^3 y% ]8 T z' w) E& nexcess.1,3
5 t4 t: K' B; a5 O- r# zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from# O* ^/ h2 O' _ m; O! o& _
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007& Z) Y5 v% w" q5 U6 u9 _
A unique entity of male-limited gonadotropin-
7 l# s1 L. }' t; [6 a* r7 bindependent precocious puberty, which is also known
, N, I8 o! @( t. F4 U" N1 _' q. oas testotoxicosis, may cause precocious puberty at a' y4 d ?0 r4 c& R% r. h ?& e
very young age. The physical findings in these boys! b0 q; s0 Q. b3 B
with this disorder are full pubertal development,1 }# ?/ t% ?$ O' o* [! N
including bilateral testicular growth, similar to boys
5 `# n! R( N r* g4 l6 c* Awith CPP. The gonadotropin levels in this disorder
& L6 @ O E8 I8 mare suppressed to prepubertal levels and do not show$ m! q: O7 Q% A$ [1 d. W
pubertal response of gonadotropin after gonadotropin-' ^" _' |4 S V5 N5 j
releasing hormone stimulation. This is a sex-linked' K8 w- n q0 J( y
autosomal dominant disorder that affects only- O. P$ V4 ]/ P, h$ B
males; therefore, other male members of the family
; A6 u* Q( i# ~- pmay have similar precocious puberty.3
U* C; `4 e& Z8 v+ b9 |In our patient, physical examination was incon-. b- i: u8 X: ]" ^, U
sistent with true precocious puberty since his testi-
! `, q8 I1 L, X5 ~' h5 |1 ?cles were prepubertal in size. However, testotoxicosis' k8 o' Y' x) W$ L2 B
was in the differential diagnosis because his father0 ?) K# P" z; [: G. ~
started puberty somewhat early, and occasionally,
4 D& c( O( G- ]3 M" P0 `$ ptesticular enlargement is not that evident in the, ^8 l( q8 q" D$ o* g0 T' ]6 g
beginning of this process.1 In the absence of a neg-
5 A6 P9 s' l3 R- Yative initial history of androgen exposure, our
2 q4 z9 q' g, h8 y1 _. k7 Y/ N/ L; Hbiggest concern was virilizing adrenal hyperplasia,
8 W, f; t& ^; \ Veither 21-hydroxylase deficiency or 11-β hydroxylase
: Z3 `# |. O+ J6 O9 J* Z/ B3 n% ?' B: fdeficiency. Those diagnoses were excluded by find-4 U9 ^" r: V( n: ^, v- {: h
ing the normal level of adrenal steroids.. H. q; n, z8 l9 r4 v
The diagnosis of exogenous androgens was strongly1 H: I% N: w0 s6 Q* U; l" i
suspected in a follow-up visit after 4 months because
$ @4 Z# M4 {2 C% d5 b* v* d% j7 n6 Ithe physical examination revealed the complete disap-
: i' H/ W9 ^& l, d% R1 k6 tpearance of pubic hair, normal growth velocity, and
! h# D, }+ S( @+ K, qdecreased erections. The father admitted using a testos-
G0 G/ H4 x k. C C' U$ Yterone gel, which he concealed at first visit. He was
8 m$ i9 z& K. J6 Dusing it rather frequently, twice a day. The Physicians’" y5 ]) r5 `' a/ p
Desk Reference, or package insert of this product, gel or& P" {/ T6 D4 S6 @) P; R
cream, cautions about dermal testosterone transfer to1 j! ?! L8 \" D0 L- I% |7 K5 A
unprotected females through direct skin exposure.
$ R$ z: D- {4 s( O" {Serum testosterone level was found to be 2 times the
. v7 X) B7 w) \/ w2 s* ^baseline value in those females who were exposed to* K4 l. l2 O" c" }0 }
even 15 minutes of direct skin contact with their male
0 C- }" j8 X* m2 v) Spartners.6 However, when a shirt covered the applica-, I4 L& ^3 t% d3 s0 k" F& |
tion site, this testosterone transfer was prevented.
, a. G5 `* @: b) k" M) QOur patient’s testosterone level was 60 ng/mL,
# U2 c# k- \% o2 h! l3 gwhich was clearly high. Some studies suggest that
' T9 f" T) N2 {! s) C, rdermal conversion of testosterone to dihydrotestos-
+ ]4 X1 `3 w. Q1 M8 r" k, ]terone, which is a more potent metabolite, is more
8 F1 V' ?, Q( Yactive in young children exposed to testosterone
) N* V( m E+ N2 qexogenously7; however, we did not measure a dihy-, o% }/ ^4 F) e) q( E; Q6 a: I: @: b
drotestosterone level in our patient. In addition to% R. F( N3 L9 ]
virilization, exposure to exogenous testosterone in9 P( {0 \0 E0 \6 E% q
children results in an increase in growth velocity and" Q0 ]7 t2 s# p: P5 y4 m* S
advanced bone age, as seen in our patient.
0 B, J/ L! G6 U" h+ kThe long-term effect of androgen exposure during
* [0 u- V* R9 ^' W5 u% Zearly childhood on pubertal development and final
! f, o j) `* }" s2 jadult height are not fully known and always remain
9 [, j- C! I0 k3 U- H G; w# @a concern. Children treated with short-term testos-9 ^0 o- F! K2 b' s) h
terone injection or topical androgen may exhibit some$ T0 i }4 V) S1 o( p8 S
acceleration of the skeletal maturation; however, after
* L3 k2 j; A9 S8 Z: ?cessation of treatment, the rate of bone maturation5 F& p, \4 e/ z$ D! f
decelerates and gradually returns to normal.8,9, u2 c: b; i0 [0 M l8 ~
There are conflicting reports and controversy2 j" |' ]0 x; D6 Y2 Y; x9 X6 k
over the effect of early androgen exposure on adult
- N; G) U* x, z8 m5 c+ {& Xpenile length.10,11 Some reports suggest subnormal
0 l& J3 b7 x: X3 jadult penile length, apparently because of downreg-
4 o; u! r* y( K3 v+ a# y+ {ulation of androgen receptor number.10,12 However,
) V7 h* q4 l& k& G2 _0 ~1 `Sutherland et al13 did not find a correlation between9 U2 r9 L( p9 X+ b
childhood testosterone exposure and reduced adult
. F* t' I1 _! V. x# L0 K# lpenile length in clinical studies.
, R! a0 n9 Z) J; G! [Nonetheless, we do not believe our patient is
" A! d+ @5 ^! D/ ~: A" |6 Pgoing to experience any of the untoward effects from
4 f& x& f; Z4 S9 O( Gtestosterone exposure as mentioned earlier because
+ f7 _ J- t0 a* H* B$ Dthe exposure was not for a prolonged period of time.
: i7 d- t0 G# g4 q; q) [8 qAlthough the bone age was advanced at the time of
2 e: ^$ K5 c4 g1 Qdiagnosis, the child had a normal growth velocity at
2 j1 C6 y6 C1 _# h2 j) W5 Y C& uthe follow-up visit. It is hoped that his final adult
1 j7 K, A% Q$ Q$ `- yheight will not be affected.& h$ B _) L8 {3 g# F
Although rarely reported, the widespread avail-4 V; n* a4 N( j( x k7 ~1 t8 T
ability of androgen products in our society may
7 Z$ x$ X9 x- I& P" windeed cause more virilization in male or female( W( A$ ]3 W+ h# m5 K& _, N( \* Q- s
children than one would realize. Exposure to andro-4 a! y" P0 m# ^! z) t$ S
gen products must be considered and specific ques-
3 t, n$ V1 x0 s& }! P) k4 p9 }tioning about the use of a testosterone product or! G q- I4 T; g: u
gel should be asked of the family members during
8 L6 H; o3 K! lthe evaluation of any children who present with vir-
( L( p. n6 J! Eilization or peripheral precocious puberty. The diag-4 d$ M/ p5 n: f1 g& @- |
nosis can be established by just a few tests and by9 I$ S9 u" B0 H4 f; [
appropriate history. The inability to obtain such a1 q6 {0 v5 L6 {) R. g& V1 W
history, or failure to ask the specific questions, may
+ k/ e! j2 H7 U. \result in extensive, unnecessary, and expensive
9 G/ q9 e. @2 d! p ninvestigation. The primary care physician should be6 `) G" l7 ]2 Q+ u1 K4 u$ Z1 R
aware of this fact, because most of these children
5 f/ P. N% O# ?) V" l0 ~5 e0 g6 zmay initially present in their practice. The Physicians’
0 {9 ?+ q; e7 X0 Q- z+ c: z2 wDesk Reference and package insert should also put a7 Z; G, Z$ L, g7 K
warning about the virilizing effect on a male or
6 Y6 q# r; K$ n) _% x; t- y# @female child who might come in contact with some-
' A# d D$ i' P0 w+ E) Hone using any of these products.
. M! C! b8 m6 o3 F9 M6 nReferences
" }( b# N7 B7 N2 ~. ~/ a3 a1. Styne DM. The testes: disorder of sexual differentiation* E+ M) j0 H, A! q) X0 e
and puberty in the male. In: Sperling MA, ed. Pediatric9 Y! S. j4 Y7 Y$ E. M
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
5 p x; ?9 y0 Y- [# z, w2002: 565-628." r0 D9 T" V' d5 a& Q" |
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious3 [3 k$ h% [. s3 e/ I/ ]
puberty in children with tumours of the suprasellar pineal. D! y1 q1 ^7 {
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 K7 [0 _( @/ d5 A3 @, PTopical Testosterone Exposure / Bhowmick et al 543
7 k$ J3 v" _$ p% Oareas: organic central precocious puberty. Acta Paediatr.
9 ]) s- h. U3 @! C: G* T2001;90:751-756.* W% d7 P k+ b! h
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
$ A" N/ b4 P' _7 z( o, UPediatric Endocrinology. 4th ed. New York, NY: Marcel
( l- z8 {3 E7 ^, F& qDekker Inc; 2003:211-238.
0 G% F) ]# T6 ^1 H4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual5 _& ^. Q$ ^0 A3 T C& m6 H- r
development in a two-year-old boy induced by topical/ s) o1 E& T1 ^% v( ~- |1 p
exposure to testosterone. Pediatrics. 1999;104:e23.6 F- M1 y- t+ o$ Z
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
8 W g r: o* C$ k5 s' bSkeletal Development of the Hand and Wrist. 2nd ed.
0 E( F; y" s b: cStanford, CA: Stanford University Press; 1959./ n; L0 p9 D9 W
6. Physicians’ Desk Reference. Androgel 1% testosterone,
6 S4 E+ _+ p: ^& V, k+ }Unimed Pharmaceutical Inc. Montvale, NJ: Medical8 a" W0 E! t) {" L% j
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