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is a significant concern for physicians. Central. z% F |( @! Q" ]. T( T
precocious puberty (CPP), which is mediated
7 J6 v: C9 X# O+ @. `9 Athrough the hypothalamic pituitary gonadal axis, has1 \% T8 s2 W7 H5 q9 G# \
a higher incidence of organic central nervous system4 z @3 `5 O. z t1 C1 x& E
lesions in boys.1,2 Virilization in boys, as manifested9 {8 M- E/ ^4 h7 A
by enlargement of the penis, development of pubic* I3 v7 |" z7 [( w% {& s
hair, and facial acne without enlargement of testi-8 N q: O8 \( v5 @3 H1 k
cles, suggests peripheral or pseudopuberty.1-3 We. {1 F, O2 i, |; F& U" K; G
report a 16-month-old boy who presented with the
" z8 t8 V. X1 @& W+ e* Uenlargement of the phallus and pubic hair develop-
' L+ c% o0 r& X( ^8 Y0 p: x, Xment without testicular enlargement, which was due
' [" L8 {, L4 @) ~, L- F7 Tto the unintentional exposure to androgen gel used by
( ?: h9 k' p5 q# o" K' C0 ^9 Pthe father. The family initially concealed this infor-
& a, b6 s! L; {3 }mation, resulting in an extensive work-up for this
9 Y* j1 v" [2 J; Ochild. Given the widespread and easy availability of
, S% Z# T6 _2 ^' H9 K0 Ktestosterone gel and cream, we believe this is proba-
' T, M# H2 F1 Y# l2 pbly more common than the rare case report in the$ O+ n4 \3 f8 w4 Y3 w& R" }5 ^
literature.4! A9 ]- i& i3 ? t1 ~( T: r
Patient Report+ }: X0 G6 ]* R( e: r; e& g" Y
A 16-month-old white child was referred to the
1 Q& f. K; o2 I8 D. K8 L# j- ?endocrine clinic by his pediatrician with the concern% ?- N' A! O6 }0 b
of early sexual development. His mother noticed8 j5 c7 ]5 y1 J2 Z$ {' l
light colored pubic hair development when he was
, n; x+ I/ j. w0 ~) B; LFrom the 1Division of Pediatric Endocrinology, 2University of
- C) `+ d" K: FSouth Alabama Medical Center, Mobile, Alabama.
9 O# c! w5 `8 X2 yAddress correspondence to: Samar K. Bhowmick, MD, FACE,
7 C' q! m2 J/ [+ oProfessor of Pediatrics, University of South Alabama, College of
) M0 V+ r; ^- W- Q0 v/ n6 `0 R$ dMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;# E9 E* ^6 d9 k: }* z; \6 K
e-mail: [email protected].1 T) q7 P( S0 i
about 6 to 7 months old, which progressively became
T' D$ o' @! t0 ?& X7 q6 U/ H1 Gdarker. She was also concerned about the enlarge-
9 J9 Z" j7 w: I5 mment of his penis and frequent erections. The child
; ?8 }/ L- f2 Q+ V7 `was the product of a full-term normal delivery, with
. }; @* W' M: Y- y; x, k8 za birth weight of 7 lb 14 oz, and birth length of* ^5 n% W5 f* I/ w* `
20 inches. He was breast-fed throughout the first year) s- R5 `6 m/ {1 s; V4 H
of life and was still receiving breast milk along with
6 ]& ^1 P) B! W6 \solid food. He had no hospitalizations or surgery,2 b C8 _$ D! A; |" f
and his psychosocial and psychomotor development
8 w e$ T$ a# X" z$ y; Z; j0 Hwas age appropriate.
# P' X2 X# W. Y& q% jThe family history was remarkable for the father,9 L: m. b/ n* E# m0 f I
who was diagnosed with hypothyroidism at age 16,
/ G% `" ], ^* y9 h6 e# t& lwhich was treated with thyroxine. The father’s
" e! K$ O0 \1 s: H, K/ aheight was 6 feet, and he went through a somewhat9 |4 o, k1 q2 B- K! D3 V2 ~5 ^+ A' B
early puberty and had stopped growing by age 14.3 y2 A+ W4 O* W8 \7 d7 A% E0 H
The father denied taking any other medication. The
8 D0 o& E! X0 D8 I: n+ L' achild’s mother was in good health. Her menarche3 j; } g( ~ ?; g2 H- E3 W
was at 11 years of age, and her height was at 5 feet
) D) ?" m2 O7 O* Y3 c8 e2 t0 ^5 inches. There was no other family history of pre-
, V9 b6 i9 m; m# icocious sexual development in the first-degree rela-9 I8 v- R$ _5 J2 Z
tives. There were no siblings.
% s' @' R$ [! \" c5 DPhysical Examination: c8 E3 v1 [/ v( n* H
The physical examination revealed a very active,& s- U+ F' ~! {7 p( O. N3 D
playful, and healthy boy. The vital signs documented
& m! Q7 ?3 z" N* ba blood pressure of 85/50 mm Hg, his length was
! o2 h9 h7 r; ]/ Y9 J N7 c+ D3 l90 cm (>97th percentile), and his weight was 14.4 kg$ ?' M; g8 `' F) d0 r8 z# |
(also >97th percentile). The observed yearly growth
' q" a/ }0 x' A9 y3 Evelocity was 30 cm (12 inches). The examination of# r, e e) E w N( G
the neck revealed no thyroid enlargement.
- M1 I" O, ]/ AThe genitourinary examination was remarkable for/ A8 B% @; R9 d) V% ~
enlargement of the penis, with a stretched length of
; Z8 w2 U ~/ M8 K) x: t: j. R8 cm and a width of 2 cm. The glans penis was very well
2 e* J8 ]" n% Hdeveloped. The pubic hair was Tanner II, mostly around/ N" a/ L: @! L6 N
540 i" G# I4 B0 A( O$ x
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" F! o( b+ v2 g& W2 f' tthe base of the phallus and was dark and curled. The
& n5 C# m: }2 l3 A, S/ Ftesticular volume was prepubertal at 2 mL each.6 P! k1 `2 f% q9 E# z
The skin was moist and smooth and somewhat
d7 L2 [. b3 f4 R/ moily. No axillary hair was noted. There were no! l. V D$ |6 R! I1 q6 d# ^
abnormal skin pigmentations or café-au-lait spots.
: ~7 I6 R, o# E. g! A5 INeurologic evaluation showed deep tendon reflex 2+' L/ C* D6 r$ E$ i* M0 i) l
bilateral and symmetrical. There was no suggestion; A. p; v1 ~* V- o% I' W
of papilledema.* X+ _, e& L* f% F' g$ D$ p
Laboratory Evaluation$ x+ Q# ?" m: B8 M u) Q+ |
The bone age was consistent with 28 months by; O: \5 M) w! Y0 P4 B2 u5 y
using the standard of Greulich and Pyle at a chrono-
/ M& m6 P+ k" ilogic age of 16 months (advanced).5 Chromosomal0 k, T p' x5 b5 c$ K- M4 a4 S( p
karyotype was 46XY. The thyroid function test( w3 {5 r- I0 d; S3 M, g
showed a free T4 of 1.69 ng/dL, and thyroid stimu-* k& }+ k, W8 O' h& [, ], E+ C$ v
lating hormone level was 1.3 µIU/mL (both normal).+ K4 Z+ }9 N$ o( Y* R
The concentrations of serum electrolytes, blood
' j1 u( E4 F: `$ O8 A) hurea nitrogen, creatinine, and calcium all were2 a, F4 `. E/ S9 n) u3 x$ C" E
within normal range for his age. The concentration" A: u6 k2 ^+ r5 t
of serum 17-hydroxyprogesterone was 16 ng/dL/ q0 e: f* f) L7 Q/ A2 G' Q
(normal, 3 to 90 ng/dL), androstenedione was 20: }+ E3 L3 E. X0 e; k
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
: d# E5 k7 ~7 F* [; Gterone was 38 ng/dL (normal, 50 to 760 ng/dL),
- z! Y2 i3 [; n/ ~ `desoxycorticosterone was 4.3 ng/dL (normal, 7 to
3 e0 D6 B" S% d4 L49ng/dL), 11-desoxycortisol (specific compound S)
; j. Y) l( W; S T1 Uwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-2 _9 [+ v0 I+ C9 O3 n
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total: S7 @7 v& l4 [8 D; t3 P# l6 `0 {
testosterone was 60 ng/dL (normal <3 to 10 ng/dL), P' e1 q- c" L' J/ ], |7 h
and β-human chorionic gonadotropin was less than
0 i+ Z; g# k, K; }0 ]5 mIU/mL (normal <5 mIU/mL). Serum follicular
5 ]: ?# _9 H4 L# r' P hstimulating hormone and leuteinizing hormone
$ k- }( ~! y2 l4 [8 e% D0 r& m+ N1 @concentrations were less than 0.05 mIU/mL
- h3 H; H; ~% t. R5 ? G(prepubertal).
8 Q7 o9 T4 v P3 XThe parents were notified about the laboratory
; R! Q- b" g" f* ~results and were informed that all of the tests were% x; Q A" s0 D# p
normal except the testosterone level was high. The, p( K" H. O+ L9 y; q8 g i1 B
follow-up visit was arranged within a few weeks to5 o/ p( d/ s+ U5 x8 q
obtain testicular and abdominal sonograms; how-
* R3 {; P5 g1 Uever, the family did not return for 4 months.
$ U1 l% ]; z% u# T$ w% SPhysical examination at this time revealed that the
8 C# r0 H1 A d2 p9 u% Lchild had grown 2.5 cm in 4 months and had gained) `3 C( }- ]. Q- ?
2 kg of weight. Physical examination remained
( t- _. R2 r1 Junchanged. Surprisingly, the pubic hair almost com-
, Z' U5 m# w6 {3 U1 c# bpletely disappeared except for a few vellous hairs at+ y5 O( l" p/ q% H! B- A
the base of the phallus. Testicular volume was still 2
3 ^. K1 z, q( E* zmL, and the size of the penis remained unchanged.
0 e: T3 ^! w. ]2 X) F" f6 `The mother also said that the boy was no longer hav-/ z, x8 L* D; B5 s
ing frequent erections.& i e. u- }; ~$ j3 I1 t) I1 _
Both parents were again questioned about use of
: c$ \$ p& s, c! \) T9 h7 Many ointment/creams that they may have applied to. c" b* v" V" J; w+ G0 i# M' V, b1 b# }
the child’s skin. This time the father admitted the
; L6 [* {' z" Z- RTopical Testosterone Exposure / Bhowmick et al 541# `4 l1 e u" S9 l
use of testosterone gel twice daily that he was apply-3 q6 E& {0 x# N- P; _
ing over his own shoulders, chest, and back area for! }3 b2 S( @" b y* ^* m4 E
a year. The father also revealed he was embarrassed7 g& ]' N4 W5 | B9 ^
to disclose that he was using a testosterone gel pre-
/ N6 T: m# v$ r0 } c# d# I# lscribed by his family physician for decreased libido/ O4 ]/ s1 T9 f
secondary to depression.* G3 s; i R+ ?( W
The child slept in the same bed with parents.5 @" P4 k8 t* c. C
The father would hug the baby and hold him on his1 B( A2 ~# ]) {! q/ _% M, m
chest for a considerable period of time, causing sig-
! W, q6 E! ]$ L; R1 Bnificant bare skin contact between baby and father." y' E5 u2 h6 A
The father also admitted that after the phone call,7 w Y" C! n1 L+ Q* J2 _
when he learned the testosterone level in the baby0 R! Z2 h; a; f. Z& |" g7 d! V
was high, he then read the product information
_$ ^* ^1 v) r2 N, t! r2 o/ Q, ppacket and concluded that it was most likely the rea-6 s; Y( x4 f6 `4 F& [5 U$ H
son for the child’s virilization. At that time, they
. _5 m- M( I, A+ |, }1 Ndecided to put the baby in a separate bed, and the
& k; J" \/ @# m6 I, U& |father was not hugging him with bare skin and had
4 @* Y2 k& q% {been using protective clothing. A repeat testosterone+ S# P+ E, C/ `4 ~
test was ordered, but the family did not go to the
, f' c" }5 s, Y- ]! h: ]8 s) q3 [laboratory to obtain the test.
1 B m8 |/ a) K$ V% t# fDiscussion
8 G; _3 r4 R- H6 i6 m: n' A+ |Precocious puberty in boys is defined as secondary" \7 r; f6 S. U9 @( N5 B! i6 q
sexual development before 9 years of age.1,4
: V$ e% j c0 O }Precocious puberty is termed as central (true) when
# q9 e1 ^4 ?/ B- z# Ait is caused by the premature activation of hypo-
+ P/ h3 x3 L0 d1 X( ^. w8 Q: [thalamic pituitary gonadal axis. CPP is more com-
8 ~7 H+ J0 I$ W- D' i4 w- l8 H* gmon in girls than in boys.1,3 Most boys with CPP! m' [5 q) ^7 n) L
may have a central nervous system lesion that is
3 y- F8 y, W* oresponsible for the early activation of the hypothal-
: c# r" A; U8 Zamic pituitary gonadal axis.1-3 Thus, greater empha-
3 \* _1 V- S! P; g1 A1 Qsis has been given to neuroradiologic imaging in e/ ?) x7 @8 n m
boys with precocious puberty. In addition to viril-# n$ u, A2 H* p* {8 E" M0 c3 H9 f
ization, the clinical hallmark of CPP is the symmet-8 w$ f7 K7 B" [- J- U, m. z
rical testicular growth secondary to stimulation by
) Z l# ~ G2 n- q9 S' U. ?5 ]9 Lgonadotropins.1,3
X1 H2 T& f6 e) W! E2 {7 ]Gonadotropin-independent peripheral preco-
7 Y- e& N# h% j. ncious puberty in boys also results from inappropriate
) r3 w4 i6 {1 [# g# pandrogenic stimulation from either endogenous or
% D6 ^. S* p0 o. ]3 ~1 Vexogenous sources, nonpituitary gonadotropin stim-
; K1 G5 {- D/ {% zulation, and rare activating mutations.3 Virilizing
s& ?- s; B* W- c* \, D( vcongenital adrenal hyperplasia producing excessive
9 @, n7 P; ^& E; ?" r$ ^8 Iadrenal androgens is a common cause of precocious9 m% p$ k: K s" I$ s y
puberty in boys.3,4
5 A- i% A6 W+ s" i aThe most common form of congenital adrenal' K" r. J4 O$ B0 @+ Q8 L
hyperplasia is the 21-hydroxylase enzyme deficiency.* l5 \, w: \' J* s
The 11-β hydroxylase deficiency may also result in
6 v; n: C k4 E2 `excessive adrenal androgen production, and rarely,4 o {2 N) {3 {+ u
an adrenal tumor may also cause adrenal androgen
3 q4 R! g$ R7 F; R( \excess.1,3: P+ @4 t2 s A4 A, k: t% E) {
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- ]( z( J, s' A" } O
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
9 \! o$ C9 y% F, k) I P. uA unique entity of male-limited gonadotropin-' d$ f% S3 b% R; P4 W$ b7 z
independent precocious puberty, which is also known/ e1 L8 K' }2 e z% @
as testotoxicosis, may cause precocious puberty at a! x; y3 k2 u' x6 x6 T, b6 Q
very young age. The physical findings in these boys
: ^& f$ x6 @0 d! J. |with this disorder are full pubertal development,8 Y- a; Z) q; a/ U1 M _
including bilateral testicular growth, similar to boys9 k: Y4 l$ K7 ?9 {
with CPP. The gonadotropin levels in this disorder
6 _9 ?! g% g# r, x; @) Xare suppressed to prepubertal levels and do not show
- z8 u- I5 a0 C* Z& S8 spubertal response of gonadotropin after gonadotropin-! B1 u s8 G/ [3 \/ {- M2 P0 X9 y9 z
releasing hormone stimulation. This is a sex-linked& I1 v; ~1 u1 E3 Q0 p9 I: a2 `3 N
autosomal dominant disorder that affects only
& @4 }: h: J& X. Zmales; therefore, other male members of the family
3 B9 @% o/ m2 I, Kmay have similar precocious puberty.3& S* _4 D1 Z: t5 X, n) Y
In our patient, physical examination was incon-( b5 C* {3 W! D; p% a: y
sistent with true precocious puberty since his testi-- i) y: i7 _$ F# B- o ~
cles were prepubertal in size. However, testotoxicosis
* C0 M$ V0 l0 C9 g r8 G' u% Twas in the differential diagnosis because his father
3 k; a y; |6 L/ @9 P' f4 bstarted puberty somewhat early, and occasionally,
& x# V" f7 G4 L+ A) mtesticular enlargement is not that evident in the
/ V9 p3 J* L% ?5 Ibeginning of this process.1 In the absence of a neg-! ~1 b9 Z& a& h; W
ative initial history of androgen exposure, our* d; B4 E0 T* X/ E3 S# e8 [
biggest concern was virilizing adrenal hyperplasia,
# U. v4 U( b- U7 R: Seither 21-hydroxylase deficiency or 11-β hydroxylase6 y; q% ~& {8 v. C W, m- f
deficiency. Those diagnoses were excluded by find-
; J7 s8 w2 Y. e$ \- h! ling the normal level of adrenal steroids.
# `7 c$ v/ _; s+ N d2 `, v% FThe diagnosis of exogenous androgens was strongly
, I/ ^0 r- @5 c7 k& \& r" zsuspected in a follow-up visit after 4 months because
# p3 a# P0 X. o1 mthe physical examination revealed the complete disap-* X- j3 q( A) \7 t6 h& X
pearance of pubic hair, normal growth velocity, and
0 f8 A) U1 M" p5 m/ G$ }/ edecreased erections. The father admitted using a testos-1 @0 m o0 L. Z8 i$ O
terone gel, which he concealed at first visit. He was
$ _# M: |" k u& Q2 Xusing it rather frequently, twice a day. The Physicians’
. f& X5 m( ] @Desk Reference, or package insert of this product, gel or4 }5 i; B2 i$ G K( h
cream, cautions about dermal testosterone transfer to& {0 {9 M# u7 J# {
unprotected females through direct skin exposure.
( f" {. u* B2 w- _2 P0 P% {2 \Serum testosterone level was found to be 2 times the
5 B, H" D: e& jbaseline value in those females who were exposed to
# z F1 L8 N# M3 e% g4 x: }! ^7 Geven 15 minutes of direct skin contact with their male
~& d- f; F6 V: k# U7 b# t' b$ X9 u" Spartners.6 However, when a shirt covered the applica-# A% ^# H& H: l! b* U* O
tion site, this testosterone transfer was prevented.
$ G. C; [5 ^0 P7 jOur patient’s testosterone level was 60 ng/mL,- P7 X( `$ Q/ V1 [
which was clearly high. Some studies suggest that
; V1 D( @6 l+ R+ Z L4 ?$ }% ?6 odermal conversion of testosterone to dihydrotestos-1 R# }4 `" w" y1 d% f# J2 M
terone, which is a more potent metabolite, is more5 W7 {# |. \- E) Q9 N6 I q6 ~" f
active in young children exposed to testosterone
& t( m. F# Q3 k" r; Mexogenously7; however, we did not measure a dihy-5 C. Q' h4 h# [# f( D, ]
drotestosterone level in our patient. In addition to
) C, a z- z8 \. U% cvirilization, exposure to exogenous testosterone in
+ V( _% j3 f6 M& B2 R# Xchildren results in an increase in growth velocity and
* F9 N7 w B) z! \0 L n0 ladvanced bone age, as seen in our patient.
! U2 T0 x. h- B+ xThe long-term effect of androgen exposure during
& `% M/ F) {0 Q8 S+ W6 x2 Fearly childhood on pubertal development and final! x2 Z6 Q2 r& _% Q
adult height are not fully known and always remain
" f7 c& ~( M6 x, k9 i0 O# ia concern. Children treated with short-term testos-
+ e1 g ^6 p4 rterone injection or topical androgen may exhibit some, a$ c- l3 _! @; L/ S6 u
acceleration of the skeletal maturation; however, after
8 R& x# h# |& m& i$ t+ {4 Ocessation of treatment, the rate of bone maturation
+ z4 x" E: V+ t4 ]decelerates and gradually returns to normal.8,9
+ W3 q4 I: { c% n# H$ s) i: d( PThere are conflicting reports and controversy) S; c2 N1 C# U# R8 C, _$ B
over the effect of early androgen exposure on adult9 O) \8 X6 D( J
penile length.10,11 Some reports suggest subnormal
" f7 H( |6 {& F& Gadult penile length, apparently because of downreg-
3 O7 P( X6 z. g# R" D( Pulation of androgen receptor number.10,12 However,. y, r% u: W% A, u" O
Sutherland et al13 did not find a correlation between
, B- S8 `% a# Z) y/ q9 s3 ~, Z6 ochildhood testosterone exposure and reduced adult* ?: j2 d9 P! U* D {
penile length in clinical studies.
9 H, j2 \+ H0 w' F, f# |! \Nonetheless, we do not believe our patient is# P# j( P5 `2 \5 m2 z6 c
going to experience any of the untoward effects from
- y+ v' A! V' t( U8 }! H* qtestosterone exposure as mentioned earlier because1 l* y9 }; i: p6 F# N5 t8 K. j" a6 k
the exposure was not for a prolonged period of time.$ a3 u8 c# k1 v) B" R6 |& l" Y7 X
Although the bone age was advanced at the time of2 X% O* M2 z" i; D) k6 Q
diagnosis, the child had a normal growth velocity at
4 v* z# X1 R `the follow-up visit. It is hoped that his final adult4 |1 n. f) t- l9 S4 }% b
height will not be affected.
( V& Z- j9 b$ x# a* A! S- |( FAlthough rarely reported, the widespread avail-
4 B# M7 s) n0 W* O" C gability of androgen products in our society may$ S9 F5 _( \6 K) M6 v/ w8 r
indeed cause more virilization in male or female0 c$ F% q5 P& S/ s& h
children than one would realize. Exposure to andro-
6 ~; i8 S5 I% C3 g! w8 c$ bgen products must be considered and specific ques-
. }( n9 `) g& y4 A. |3 F1 K# F' Ftioning about the use of a testosterone product or [# d5 K# V7 W! ~0 ]9 L
gel should be asked of the family members during
$ e7 v5 K0 d3 `! j% uthe evaluation of any children who present with vir-
4 P/ }2 g/ Q }0 f" l6 H8 O tilization or peripheral precocious puberty. The diag-: \' E3 Q6 o. m
nosis can be established by just a few tests and by
6 M* n, p1 ~2 W# J% Z( c% Qappropriate history. The inability to obtain such a o' x& B0 h3 @' Q+ b0 A- y$ r
history, or failure to ask the specific questions, may4 Z/ f7 W4 s) Y4 p
result in extensive, unnecessary, and expensive
8 y, G" @4 ?) W/ ?6 _- M5 f- W winvestigation. The primary care physician should be
6 I% g# b8 N# yaware of this fact, because most of these children$ D3 w. i7 r0 b
may initially present in their practice. The Physicians’
+ z; H' S/ ]# f2 L5 H2 ~) ~Desk Reference and package insert should also put a9 M. Y, p2 n* n% e5 ^8 Y& n# I
warning about the virilizing effect on a male or
( y7 m8 l( |0 K4 _% bfemale child who might come in contact with some-
: X% s2 X* V6 uone using any of these products.
; e O/ W( r9 u* PReferences( y0 I$ {% t2 S" [- x' I" ~
1. Styne DM. The testes: disorder of sexual differentiation' |* N0 P( M p- Y
and puberty in the male. In: Sperling MA, ed. Pediatric( A( s2 j0 C$ H+ a8 @# N: {- D
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;( y6 Z" x; O, z; W: c
2002: 565-628.
, j0 Y& k. K% r2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
! P( q$ Q# H$ a' D# Z( [& Z( X' hpuberty in children with tumours of the suprasellar pineal
( S, y, ^$ v/ zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: g# n. q% ~' W5 B$ i1 |Topical Testosterone Exposure / Bhowmick et al 543
) d% r; N* j; m4 n0 |! `areas: organic central precocious puberty. Acta Paediatr.
) h U) A, G( \- v- m7 ^2001;90:751-756.# L2 m \: S/ k, N, {: T- @
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
" x2 t4 ^6 V9 O7 N$ {Pediatric Endocrinology. 4th ed. New York, NY: Marcel
/ P4 D& k' D- l8 o. ]; m$ s6 _Dekker Inc; 2003:211-238.
+ k' O& b) s3 \2 r4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
1 M( s/ E# C' rdevelopment in a two-year-old boy induced by topical
3 |" P8 h/ v) aexposure to testosterone. Pediatrics. 1999;104:e23.
+ }- \ Y# b4 l% i+ a5 O' J# E5 Q5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
% q0 G& {. b5 g) A5 ]8 ~Skeletal Development of the Hand and Wrist. 2nd ed.' u, U. \/ m3 [% n' _
Stanford, CA: Stanford University Press; 1959.# H' N6 }3 s s& n0 J
6. Physicians’ Desk Reference. Androgel 1% testosterone,
" U9 _2 B; @$ h( G- BUnimed Pharmaceutical Inc. Montvale, NJ: Medical- F: i/ v# D/ L$ f# v4 F0 {: n
Economics Company, Inc; 2004:3239-3241.5 }1 G V, B w' f' e( f
7. Klugo RC, Cerny JC. Response of micropenis to topical
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