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is a significant concern for physicians. Central
4 @* F3 p8 u9 l0 A- p3 K( lprecocious puberty (CPP), which is mediated
/ u/ g( H( c8 c# Z2 t b: Kthrough the hypothalamic pituitary gonadal axis, has
$ t; L9 N; B& G4 |, {0 Ea higher incidence of organic central nervous system
$ Q9 W, r2 U6 n) zlesions in boys.1,2 Virilization in boys, as manifested U3 D+ q% }. E
by enlargement of the penis, development of pubic( y! c9 L, _: t8 s/ x+ O" P" D
hair, and facial acne without enlargement of testi-* V4 u( B$ |. r/ F# m8 w) a5 E
cles, suggests peripheral or pseudopuberty.1-3 We. T7 O/ P) D2 r; P' c/ J
report a 16-month-old boy who presented with the
, e. I! }4 F6 n' ?* }+ Venlargement of the phallus and pubic hair develop-% ?( q# ?. V6 e( X, P7 o- l6 A& Z
ment without testicular enlargement, which was due
! E7 V* d2 p5 b6 j2 Cto the unintentional exposure to androgen gel used by
6 Q2 ]! f& f2 a. mthe father. The family initially concealed this infor-5 i1 ]: [! H5 M4 Z& S% f! ^
mation, resulting in an extensive work-up for this" B$ j3 E: z6 n* m& c
child. Given the widespread and easy availability of. _2 b1 ]" [. U. a5 s" l: \
testosterone gel and cream, we believe this is proba-+ ]1 Q$ [! `4 }1 G. t
bly more common than the rare case report in the
5 p/ @5 m: X, B* i: R3 d0 eliterature.45 F* k. `8 J* g% |
Patient Report9 g6 }; Q6 u# O' S1 n
A 16-month-old white child was referred to the
9 D- Z! N5 `4 i+ I! Eendocrine clinic by his pediatrician with the concern
) q" q9 P2 R. hof early sexual development. His mother noticed
* ]/ [- c x9 i8 F! ]light colored pubic hair development when he was
/ K# m7 G; C5 \From the 1Division of Pediatric Endocrinology, 2University of
j$ K, Q2 g4 N, n3 k2 U+ g; k) ESouth Alabama Medical Center, Mobile, Alabama.
7 [7 x J. l: @2 L% s# ~! G/ mAddress correspondence to: Samar K. Bhowmick, MD, FACE,7 j: J9 P, b% n8 E8 m, j
Professor of Pediatrics, University of South Alabama, College of
( j! H s9 v" E) J/ D0 }1 v7 _7 E! ^Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
2 d+ a) G* N' n+ ]3 ?3 T4 f2 a. Ze-mail: [email protected].
$ _4 H) J" g* Z6 ]' } jabout 6 to 7 months old, which progressively became
$ T; t" I: L: H& ]$ y* Wdarker. She was also concerned about the enlarge-! s8 c* |) y0 }, }* c* N
ment of his penis and frequent erections. The child
) V5 t$ Y+ b4 t* @& @; lwas the product of a full-term normal delivery, with6 w( W; i, R" g1 D6 q' s% Z
a birth weight of 7 lb 14 oz, and birth length of K% l6 q1 w+ c: c1 r
20 inches. He was breast-fed throughout the first year
9 J) S: E. N$ P( Z% nof life and was still receiving breast milk along with
9 t( L( g3 B. D9 K3 csolid food. He had no hospitalizations or surgery,, j! d* N1 {5 }
and his psychosocial and psychomotor development
/ Q' u9 H) }! D: `- _, J. ]0 vwas age appropriate.
9 o5 Z4 x N* f2 C4 _The family history was remarkable for the father, ]* ]/ I1 p; v1 H
who was diagnosed with hypothyroidism at age 16,
$ h; }- o4 P6 j: x4 ewhich was treated with thyroxine. The father’s
7 q$ i9 k0 S: u: ?" vheight was 6 feet, and he went through a somewhat; T' R: P _6 g( }* {
early puberty and had stopped growing by age 14.2 `1 T; U7 e; G/ Y
The father denied taking any other medication. The/ J# a2 o9 p* G4 d: O7 D$ U
child’s mother was in good health. Her menarche; J5 d; q7 v, ~1 U; w
was at 11 years of age, and her height was at 5 feet
( Q! |- v, J6 m$ r5 }) n5 inches. There was no other family history of pre-
$ p: E2 u! G( \/ j, m. Gcocious sexual development in the first-degree rela-4 x1 T6 \) m/ z& b9 F( x' H
tives. There were no siblings.
' j% j b& ^' c, K+ Z, MPhysical Examination
; x+ P) ?( @& K0 n" PThe physical examination revealed a very active,- w, ^7 p% h1 R. h2 |/ n
playful, and healthy boy. The vital signs documented$ r" u" q( R$ S8 p+ e" K
a blood pressure of 85/50 mm Hg, his length was4 V/ w' G8 n2 f
90 cm (>97th percentile), and his weight was 14.4 kg3 g9 R9 _/ {# z; a
(also >97th percentile). The observed yearly growth- B6 P# f( I3 w; H1 a7 h) c
velocity was 30 cm (12 inches). The examination of& b- r/ Q% e: w6 j* j: T* s5 N
the neck revealed no thyroid enlargement.% I, q# L5 v3 Q) J" l- L7 u
The genitourinary examination was remarkable for
5 f' |# e; R& i3 V4 T7 B2 xenlargement of the penis, with a stretched length of
+ q" W: l; {2 D4 g3 Z8 cm and a width of 2 cm. The glans penis was very well
2 D7 x, _# z$ p# m8 C. W; j sdeveloped. The pubic hair was Tanner II, mostly around7 [+ K8 j( E3 X" n; u
540
: `/ n+ j$ x2 d5 W: P: |3 t' o! \) Xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ l& D- ~8 I2 d7 q+ I8 e
the base of the phallus and was dark and curled. The
# f: r0 I. y( h$ Ttesticular volume was prepubertal at 2 mL each.0 }. Q; ^0 d( a# C V" U
The skin was moist and smooth and somewhat
) E7 ?( R8 h( U2 |& D' yoily. No axillary hair was noted. There were no: u/ M+ w) A$ ^
abnormal skin pigmentations or café-au-lait spots." v2 b7 t% P$ O( _3 {. G, L% ~
Neurologic evaluation showed deep tendon reflex 2+
+ P) S: _" `" }) d) ` Q/ ubilateral and symmetrical. There was no suggestion9 C- r5 |. K" {8 x
of papilledema.; V7 O' P; O) ]% w2 Y/ {
Laboratory Evaluation
7 C7 C) R/ v7 d0 L( rThe bone age was consistent with 28 months by
- R, a2 u& V3 V# q8 S5 S7 yusing the standard of Greulich and Pyle at a chrono-
* R1 r/ j9 h5 e6 p) O8 Klogic age of 16 months (advanced).5 Chromosomal( K, b0 Y4 T) G
karyotype was 46XY. The thyroid function test5 F# r0 b$ F. l. K7 ?
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
# D8 s4 L3 w2 a. C0 E4 n: rlating hormone level was 1.3 µIU/mL (both normal).
* h S! Z# E& ^4 T. M* r nThe concentrations of serum electrolytes, blood' T y7 J3 r5 K7 S8 L0 g: Y, {
urea nitrogen, creatinine, and calcium all were$ k3 j$ Q# d) j: [
within normal range for his age. The concentration
2 t- I% U6 q7 g6 k& o; u2 R( q( yof serum 17-hydroxyprogesterone was 16 ng/dL
& ?, x, E3 R$ r& z(normal, 3 to 90 ng/dL), androstenedione was 20
0 @( y* D4 q, m7 H) E% fng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-+ I& W2 @, ?7 M$ S" t: S
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
1 J* s+ x$ F- B+ n9 i2 wdesoxycorticosterone was 4.3 ng/dL (normal, 7 to7 n P: D7 i, L
49ng/dL), 11-desoxycortisol (specific compound S)
! m3 |) g2 U# I7 r: u0 L/ w( Dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-6 \0 i8 Q, ^# ]" w
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total' f' ^. u0 _3 u: u$ u$ L
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
/ m* ]/ h% f2 s( xand β-human chorionic gonadotropin was less than
3 M; z2 u- `& P, w7 n% ` p5 mIU/mL (normal <5 mIU/mL). Serum follicular
* x- v" t9 Q# {, r* Z$ ?4 u0 ~stimulating hormone and leuteinizing hormone
0 {2 L* u! x' d9 xconcentrations were less than 0.05 mIU/mL
5 i% ]& ^! `3 ]8 r- i- a6 N* X! U% N(prepubertal).
3 T/ p5 L; d9 }! |2 RThe parents were notified about the laboratory
I# }% B( @! ^# w. p9 t0 t3 Rresults and were informed that all of the tests were
* B6 B1 @* Y' w+ Qnormal except the testosterone level was high. The) Q" H; O/ ?' s0 j
follow-up visit was arranged within a few weeks to
9 q/ _" G0 L- v3 aobtain testicular and abdominal sonograms; how-& g0 T0 T' Z4 v" t# P+ o" x9 f
ever, the family did not return for 4 months.' W+ K4 X7 ?; M% U2 J
Physical examination at this time revealed that the
3 k3 e2 p. X# T5 W/ F6 _" @child had grown 2.5 cm in 4 months and had gained
( V; r4 A* N: I- l7 x2 kg of weight. Physical examination remained
0 O% w( u5 L, S$ W% ], d4 }) Z- P1 \unchanged. Surprisingly, the pubic hair almost com-5 b; u* b( J4 p7 N- t0 E
pletely disappeared except for a few vellous hairs at' b& P5 ~) M; p+ O. o2 z
the base of the phallus. Testicular volume was still 2
' s9 f8 w1 |+ J# C) [2 M: NmL, and the size of the penis remained unchanged.
7 y% `/ \/ @% u1 M) m3 XThe mother also said that the boy was no longer hav-/ \6 b$ E# C+ F
ing frequent erections.7 f4 l0 `& n4 O. `9 O
Both parents were again questioned about use of0 t7 W# {' }, _* C3 k) O
any ointment/creams that they may have applied to
. |$ E9 r- k# k8 J' ythe child’s skin. This time the father admitted the _$ V! Y" z) _4 O0 T
Topical Testosterone Exposure / Bhowmick et al 541
+ j* O5 B& s: Ruse of testosterone gel twice daily that he was apply-3 s! v9 e+ Y( |0 d6 x; y7 k' H8 X+ ?
ing over his own shoulders, chest, and back area for
' S$ I1 {" R0 V( Y2 S. Ma year. The father also revealed he was embarrassed
" M4 j z. _2 U W U \to disclose that he was using a testosterone gel pre- c1 t1 d# k: M& D
scribed by his family physician for decreased libido9 }% A. r" h7 {$ M
secondary to depression.
6 H( e0 {3 u1 B! z# R! KThe child slept in the same bed with parents.
, A: h( a; E8 m& D+ ]0 p9 ^- cThe father would hug the baby and hold him on his
0 g( o/ f/ C# ]+ f. g1 {2 g5 d- R0 nchest for a considerable period of time, causing sig-$ P! X8 i- ?: l
nificant bare skin contact between baby and father.) p9 g; W' k0 {# X: z4 ^. ]
The father also admitted that after the phone call,
* b; L7 \( D& x& @2 r) i# ?% cwhen he learned the testosterone level in the baby
7 u4 P1 E7 @7 x6 s. Rwas high, he then read the product information% p% I" T# F$ r; T; I8 n& A2 a
packet and concluded that it was most likely the rea-) r" I% @1 \5 E# K
son for the child’s virilization. At that time, they
0 x& S. _! [" s6 bdecided to put the baby in a separate bed, and the
! ]- \7 }5 @/ Pfather was not hugging him with bare skin and had
2 l/ f' ~2 u, t, V- @been using protective clothing. A repeat testosterone
/ \+ q) O4 D1 ]5 o/ Jtest was ordered, but the family did not go to the* P( }+ z0 Z& K7 C: S1 T* k6 J
laboratory to obtain the test.+ W7 p4 S# }& \) u; D" s3 G- L6 o: o! [
Discussion
8 Z( U$ M, `1 D5 Z4 ePrecocious puberty in boys is defined as secondary* \0 [9 ^' y" [1 E6 v# m* o/ m
sexual development before 9 years of age.1,4
# Z+ j2 H+ T& ~/ d& NPrecocious puberty is termed as central (true) when' W. [$ L# t5 Z
it is caused by the premature activation of hypo-
: G* Y3 M9 t$ E! P$ Rthalamic pituitary gonadal axis. CPP is more com-. W0 ]- {( r0 K7 h( P) N& N0 u# f
mon in girls than in boys.1,3 Most boys with CPP
# j: X" ?/ `5 A3 M. ~+ rmay have a central nervous system lesion that is4 w* G8 m N# K0 \4 X9 @9 h& o/ n
responsible for the early activation of the hypothal-
. [3 r$ O; h% w/ o9 o ramic pituitary gonadal axis.1-3 Thus, greater empha-
5 m' `; K9 L- f; ]) E6 j0 fsis has been given to neuroradiologic imaging in) o+ o4 U* Q! t$ |# R, y
boys with precocious puberty. In addition to viril-! z, t% m! [" m; `
ization, the clinical hallmark of CPP is the symmet-
. t" t2 H' v1 W3 frical testicular growth secondary to stimulation by! H2 [' _1 m3 e" B$ R, y
gonadotropins.1,3
2 H5 }6 D3 ] s' V" s9 e: |Gonadotropin-independent peripheral preco-3 h9 j1 V- G$ L0 u6 @
cious puberty in boys also results from inappropriate
( k. M) K }" C# s! ^' bandrogenic stimulation from either endogenous or7 p+ }+ \; j9 ^$ v+ ^3 D
exogenous sources, nonpituitary gonadotropin stim-1 v5 s* s7 E. v& F* f
ulation, and rare activating mutations.3 Virilizing% p) {) i9 C8 f
congenital adrenal hyperplasia producing excessive
+ M# D8 ^) ]5 G& ^. w0 a) zadrenal androgens is a common cause of precocious6 { L) x. v0 I8 g
puberty in boys.3,4
8 q& m2 C4 d1 ]2 }! q0 l1 mThe most common form of congenital adrenal
" I8 Q0 Z* Z& r: I; z% ahyperplasia is the 21-hydroxylase enzyme deficiency. o4 o9 l3 ~- [* W
The 11-β hydroxylase deficiency may also result in F- t1 g: t5 Y0 e
excessive adrenal androgen production, and rarely,5 q; A' W8 l$ E: z% o
an adrenal tumor may also cause adrenal androgen7 x7 q- Q! v7 k% x: p. `; r
excess.1,3
3 Z! d a. ?, U# L/ U& N( N8 Uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
\9 s9 f$ S6 g3 e: i1 E542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
3 x2 V7 C4 p/ ~& S- ZA unique entity of male-limited gonadotropin-: H" f" l( {! r4 n: ]
independent precocious puberty, which is also known$ B4 d) a V8 m$ W V0 w
as testotoxicosis, may cause precocious puberty at a! s; y$ U- f0 C" u
very young age. The physical findings in these boys
/ V1 q& t' f }with this disorder are full pubertal development,
; L+ A+ Y! Y& z6 j( O# j4 Y4 O- \including bilateral testicular growth, similar to boys
+ Y5 @9 t" Q3 d* s( P& T0 nwith CPP. The gonadotropin levels in this disorder4 H( |" j6 F- S; {; M2 g
are suppressed to prepubertal levels and do not show; m0 ?3 k3 a- N
pubertal response of gonadotropin after gonadotropin-* z- r. j; i+ y9 j/ B2 l
releasing hormone stimulation. This is a sex-linked- l0 Q' r" a& H- H& Z I/ l3 i- C
autosomal dominant disorder that affects only
, U% l: c3 N5 F6 c: p/ K) Dmales; therefore, other male members of the family9 h! F3 ?& s7 p6 O5 C) W
may have similar precocious puberty.3: L5 B7 ]0 D {: s
In our patient, physical examination was incon-8 T; t# z4 _6 S6 j+ c0 W; H
sistent with true precocious puberty since his testi-7 N7 a, q$ e2 N' G6 p6 k1 F
cles were prepubertal in size. However, testotoxicosis
4 z( G3 i" r( W+ i! Y4 [was in the differential diagnosis because his father8 v( F' O2 G' h; T& q) P" |
started puberty somewhat early, and occasionally,, `) P/ L$ q; t8 H* y
testicular enlargement is not that evident in the
( d1 B; J/ g1 f0 T% }$ J8 sbeginning of this process.1 In the absence of a neg-
( j! D8 P. [) N/ Jative initial history of androgen exposure, our
4 c, g( x0 n8 l& _! ~( \* O( Hbiggest concern was virilizing adrenal hyperplasia,* u2 C% G O4 d" u! R2 y
either 21-hydroxylase deficiency or 11-β hydroxylase) Q" v3 w z c" O( K
deficiency. Those diagnoses were excluded by find-
& E6 u; K. M+ King the normal level of adrenal steroids.
+ y0 T8 j7 _7 g! E2 D! NThe diagnosis of exogenous androgens was strongly# u8 |+ B8 J, P# V( a, n3 l
suspected in a follow-up visit after 4 months because z+ G& Y9 S8 _$ }9 V$ d
the physical examination revealed the complete disap-" z6 F, ~6 p5 o, _7 o- W/ E' v
pearance of pubic hair, normal growth velocity, and: T; u7 Y* n! Q$ }+ m3 A
decreased erections. The father admitted using a testos-$ V" A% Z+ ]3 M- k4 u
terone gel, which he concealed at first visit. He was
p4 {3 w. `: K8 Rusing it rather frequently, twice a day. The Physicians’: N, b. u0 T5 h7 N: P* M6 o
Desk Reference, or package insert of this product, gel or1 H- `8 `! L4 |" R+ i9 I
cream, cautions about dermal testosterone transfer to
5 B' g9 z+ \4 J( Funprotected females through direct skin exposure.& {8 \3 h! [1 q- f* Q! c. s
Serum testosterone level was found to be 2 times the8 D2 B( B9 s3 s9 H
baseline value in those females who were exposed to
: a: |# x7 _) ]/ `3 v. aeven 15 minutes of direct skin contact with their male
4 |" y/ |- W6 Q) _9 |* zpartners.6 However, when a shirt covered the applica-
( J7 `: {/ F, G" [0 s. \tion site, this testosterone transfer was prevented.
. ~, `+ [: o! J6 A5 Y4 lOur patient’s testosterone level was 60 ng/mL,
5 v2 b0 T5 C$ ? z' a4 [% y1 Fwhich was clearly high. Some studies suggest that
: z$ z& x& U. R7 o$ O o5 rdermal conversion of testosterone to dihydrotestos-
, K9 G3 V I$ F9 }( d8 h6 ~3 xterone, which is a more potent metabolite, is more
2 Y4 C3 `' A* B- f1 zactive in young children exposed to testosterone" s' J2 q7 Y9 J+ `4 N) u2 m' O m
exogenously7; however, we did not measure a dihy-( q0 z! Q4 h% H
drotestosterone level in our patient. In addition to- M7 q, C" P: E, t/ ?, A" w
virilization, exposure to exogenous testosterone in/ a8 [; ^4 H' z
children results in an increase in growth velocity and
- q8 u5 l1 |3 \ }7 zadvanced bone age, as seen in our patient.1 W+ r( k1 ^) y \
The long-term effect of androgen exposure during
& x; R# i# n' n% j- X1 cearly childhood on pubertal development and final( d$ [2 |; x0 j3 K8 s7 `: b, a
adult height are not fully known and always remain
0 ~3 [; A' L+ v( ba concern. Children treated with short-term testos-
5 n( X3 Y @7 bterone injection or topical androgen may exhibit some
+ g# B$ R' L$ q5 Y# R) \acceleration of the skeletal maturation; however, after- _& Q9 T4 m) B8 Q
cessation of treatment, the rate of bone maturation
" h& q' n j+ ]2 g4 zdecelerates and gradually returns to normal.8,9! d) H k4 ~/ G* ~0 Y
There are conflicting reports and controversy0 S" G, |4 L$ N* Q2 `* Y
over the effect of early androgen exposure on adult4 l8 t9 i' j2 K( N
penile length.10,11 Some reports suggest subnormal
# H% o a" z* U' n5 U6 xadult penile length, apparently because of downreg-
8 G& l+ M' E' a" b5 oulation of androgen receptor number.10,12 However," }" N! {% P9 u6 J* ~) d( x
Sutherland et al13 did not find a correlation between, r- [% u5 Q, N4 X- x& ]
childhood testosterone exposure and reduced adult8 Q- n# E* }& T: ]4 ?
penile length in clinical studies. N& D/ v* y( m: j
Nonetheless, we do not believe our patient is
4 [! i( n; T- _3 U; T1 sgoing to experience any of the untoward effects from4 X0 K4 N1 p5 p0 g/ N; U) `
testosterone exposure as mentioned earlier because
* R2 J- }+ l# Uthe exposure was not for a prolonged period of time.
2 h3 q5 i" J# Q3 P I0 h/ v4 G( dAlthough the bone age was advanced at the time of
# k8 W2 d" m b. Gdiagnosis, the child had a normal growth velocity at* k3 ]) y' t |, I7 I0 a0 ^5 F7 G
the follow-up visit. It is hoped that his final adult% P1 V8 d, ^1 {9 Z6 W+ o
height will not be affected.
1 h4 J. T% T* G3 kAlthough rarely reported, the widespread avail-3 {7 g$ b+ ?# y6 @" i
ability of androgen products in our society may
" J, ~ t1 ]9 A \0 Y. }6 Q/ Uindeed cause more virilization in male or female
7 N4 q" i% p a4 [% N# J2 ?children than one would realize. Exposure to andro-
8 M8 k5 |) a, [0 E" \2 r) k4 Rgen products must be considered and specific ques-9 q$ k& f1 O* y) V: o: I, z1 o& ?7 D
tioning about the use of a testosterone product or2 W6 @! w1 Y) b7 ]. l: L
gel should be asked of the family members during
& v+ Z* B6 x( W/ w) ~" v* Vthe evaluation of any children who present with vir-* `5 u. ~1 G! d+ H3 }( Q
ilization or peripheral precocious puberty. The diag-4 Q, K+ A0 l& M2 O) C
nosis can be established by just a few tests and by( z0 Q( @$ L" U
appropriate history. The inability to obtain such a0 w, u) b5 B% U0 ]
history, or failure to ask the specific questions, may% J. A; F% [$ p! e4 u& w
result in extensive, unnecessary, and expensive. X! v" ?7 i2 ]+ X) {9 L
investigation. The primary care physician should be' B; r* A- f C0 Y- p7 [& v r
aware of this fact, because most of these children: {7 J) Z0 S# D2 L9 Q; H) x. V" v2 V4 c
may initially present in their practice. The Physicians’
1 a: m# H0 x3 W4 W1 a0 sDesk Reference and package insert should also put a
7 c) r3 Q, `. Lwarning about the virilizing effect on a male or. U( ]* U D) V* e+ x3 m. |
female child who might come in contact with some-
+ |7 o! J1 P5 n8 I' _9 j, ione using any of these products.
( a5 v ^7 l$ U' ~$ cReferences! n w b- j$ {" {9 v8 B, ]
1. Styne DM. The testes: disorder of sexual differentiation6 n9 E$ e7 d- T$ T) \; d% n9 A
and puberty in the male. In: Sperling MA, ed. Pediatric' B: d3 V0 \& F; R; f7 n
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;2 J5 ^4 P+ f) s: `
2002: 565-628.9 N( J" n, q% T9 o
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious; C0 \( B2 G9 @6 A) l
puberty in children with tumours of the suprasellar pineal+ _4 }6 \0 U: X
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from0 [1 U2 K2 e* h" n3 w' G
Topical Testosterone Exposure / Bhowmick et al 5435 {5 D% r2 Z# |$ ^0 V- N! ~& p" c
areas: organic central precocious puberty. Acta Paediatr.
; F" x6 {" B; E M ~ V1 k2001;90:751-756.! h# t; G5 o" |+ U, P- g2 F, E
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.% e) e |% s& e2 B3 _+ I# k
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
5 i' s: [, E, L( e! k YDekker Inc; 2003:211-238.
2 H0 j$ E5 D: b( H& {4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual$ j: k- l, v; @+ {# F: v8 d5 e
development in a two-year-old boy induced by topical% x5 [. |3 h6 q1 O, h! ]6 l8 j
exposure to testosterone. Pediatrics. 1999;104:e23.
- @$ K# {/ z' E! h: x( F5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
% R8 Y# W* O/ zSkeletal Development of the Hand and Wrist. 2nd ed.
5 v+ v: B4 K5 _7 Y% ]) eStanford, CA: Stanford University Press; 1959.
" U0 R1 U: t. H8 u6. Physicians’ Desk Reference. Androgel 1% testosterone,) e6 ~6 q8 { v( o
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
( E3 a1 c. y8 R: s1 R" qEconomics Company, Inc; 2004:3239-3241.
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