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is a significant concern for physicians. Central# d, C5 p3 ?$ `- I3 w# [2 A0 {
precocious puberty (CPP), which is mediated
, c, @3 u! v j( S- b6 Z! dthrough the hypothalamic pituitary gonadal axis, has
6 T& O- Q5 w6 M2 @3 {a higher incidence of organic central nervous system
0 X0 y* p2 g1 h9 F v3 \7 u% qlesions in boys.1,2 Virilization in boys, as manifested
& y1 s: V2 B9 q, z( Qby enlargement of the penis, development of pubic4 Q) d# H* c4 ^' C
hair, and facial acne without enlargement of testi-& t/ W+ `& O7 b/ O, U
cles, suggests peripheral or pseudopuberty.1-3 We
& W( n) z6 l: ]0 j' N6 Jreport a 16-month-old boy who presented with the3 b* c' X. ?" p! @
enlargement of the phallus and pubic hair develop-
: M, G5 g. Y# N* ^2 Kment without testicular enlargement, which was due! l \$ S0 D0 e+ Z+ G. W
to the unintentional exposure to androgen gel used by
0 e) N5 I) T* x8 N/ V0 kthe father. The family initially concealed this infor-
2 R, q, ?8 ]$ S' J4 M1 s: O ?mation, resulting in an extensive work-up for this/ A5 s6 ]. h8 A6 `6 q, L
child. Given the widespread and easy availability of, ?- n( e* [" Y m7 |5 t$ z& _. L& }
testosterone gel and cream, we believe this is proba-
; G. h) W! a$ u+ pbly more common than the rare case report in the' b" E( B" x+ n1 g6 F/ N
literature.45 I) B" N3 M* N B1 y+ l
Patient Report
* \5 Q# n. x1 j$ K5 i$ D5 C4 e6 eA 16-month-old white child was referred to the
% a2 Y, C$ T8 d: wendocrine clinic by his pediatrician with the concern! C. u0 `( @! {8 i
of early sexual development. His mother noticed
: I* L8 [; H8 \/ r, o1 A3 }light colored pubic hair development when he was- k1 r w# W7 b1 ]; [ Y
From the 1Division of Pediatric Endocrinology, 2University of
}; I/ }! m; D5 P- rSouth Alabama Medical Center, Mobile, Alabama.% o8 d* s& Y7 q& C- C% u
Address correspondence to: Samar K. Bhowmick, MD, FACE,
% {" K4 n+ W& r) uProfessor of Pediatrics, University of South Alabama, College of6 B( j* y4 E! P
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;5 x1 i( C2 G, n- w0 H. [/ ~% c& m* d
e-mail: [email protected].
. c! h# k3 i( M' m2 }& @about 6 to 7 months old, which progressively became% r- L9 M$ t1 K. ?% J
darker. She was also concerned about the enlarge-6 Q0 `& A3 m4 y* A/ w
ment of his penis and frequent erections. The child9 ]+ f% f/ ?$ O2 H9 l N. s2 _
was the product of a full-term normal delivery, with
4 a3 _5 s8 q9 D. N& U9 U. V" Ga birth weight of 7 lb 14 oz, and birth length of
; G& u7 m, B& I: K! n! |. x20 inches. He was breast-fed throughout the first year0 `8 S: R! M* i# e/ Q$ g1 ?
of life and was still receiving breast milk along with$ j- w. u$ O+ s
solid food. He had no hospitalizations or surgery,
) P/ V% O0 v6 M6 i- c7 y/ ^0 L: [and his psychosocial and psychomotor development
: R, B7 u& g! l+ H8 H1 a1 B7 Rwas age appropriate.
6 z" t4 V" P# Q/ kThe family history was remarkable for the father,4 O* a# P" i1 @3 m
who was diagnosed with hypothyroidism at age 16,. D) E2 H3 ~! W3 _. n" x$ @) b- h
which was treated with thyroxine. The father’s
( s6 N/ M2 E( x+ N% B# p, mheight was 6 feet, and he went through a somewhat0 H3 c2 e' B8 W4 A( `+ C" j4 ^7 w$ V
early puberty and had stopped growing by age 14.' W2 Q8 q5 I, W
The father denied taking any other medication. The
$ R# }0 e: s, `0 a, ichild’s mother was in good health. Her menarche2 z1 N' x$ u) M
was at 11 years of age, and her height was at 5 feet
8 Q3 G. Q. n Q r. b8 t5 inches. There was no other family history of pre-' ^( Q; x5 D% N7 l5 Z0 r1 \
cocious sexual development in the first-degree rela-
; D0 y, z' V( J1 [# Dtives. There were no siblings.
2 |& j, J8 O, E- LPhysical Examination
4 j& ~- `1 u' kThe physical examination revealed a very active,
) y' o$ \; T S! h8 L% {' p) Yplayful, and healthy boy. The vital signs documented
# r M4 f% e' }; M5 N% }1 ga blood pressure of 85/50 mm Hg, his length was
7 k/ e5 W# }6 \% l- k90 cm (>97th percentile), and his weight was 14.4 kg
. w: S7 `' e3 H3 i3 |(also >97th percentile). The observed yearly growth: v! o( _0 F1 H% c3 Q
velocity was 30 cm (12 inches). The examination of; a; S5 P* Q" J6 s0 a. B
the neck revealed no thyroid enlargement.! i' Q: u0 v' h. v4 N
The genitourinary examination was remarkable for
/ F9 |* H+ P3 f' {) w+ {& oenlargement of the penis, with a stretched length of7 Z6 W/ b3 }- |% t# R' C
8 cm and a width of 2 cm. The glans penis was very well9 }0 x0 ?! ^$ r; F
developed. The pubic hair was Tanner II, mostly around+ A: n- I3 L* i
540
7 a6 W3 N- h" ~2 p3 P6 Jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
' ?. ?" A4 W! Q8 J6 N; z+ ]( Zthe base of the phallus and was dark and curled. The1 d' Y: w2 U$ U
testicular volume was prepubertal at 2 mL each.
" M3 N% H$ K- m$ e0 b) n) }The skin was moist and smooth and somewhat
- I9 M3 Y: ~8 U# d. Uoily. No axillary hair was noted. There were no5 A, B: W% \' o0 }9 m3 i; K: b
abnormal skin pigmentations or café-au-lait spots.7 c% z' J8 |- x5 n8 t
Neurologic evaluation showed deep tendon reflex 2+
7 h8 d/ G8 ~( m1 Xbilateral and symmetrical. There was no suggestion2 Z# ]2 R& Z+ e. I/ o+ p" Z
of papilledema.
) H! v6 O( g* S3 z7 uLaboratory Evaluation
- L! \, H0 e8 ^9 O& uThe bone age was consistent with 28 months by! B9 N$ l8 f8 {, O) O N7 O
using the standard of Greulich and Pyle at a chrono-* J6 r7 y" \2 I4 `
logic age of 16 months (advanced).5 Chromosomal
" W$ c0 ]& s3 S/ t0 w, Akaryotype was 46XY. The thyroid function test
5 |2 w3 v. F5 M4 T, Xshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
4 n0 g; d ]( s& Alating hormone level was 1.3 µIU/mL (both normal)./ A. K* _) b a* Q4 w! X5 l6 N
The concentrations of serum electrolytes, blood
3 Z* p5 r1 d, purea nitrogen, creatinine, and calcium all were
1 }1 I7 O/ ?. z! w6 R/ `" Y. U* ywithin normal range for his age. The concentration
5 K1 M( _% g7 ^4 H7 Yof serum 17-hydroxyprogesterone was 16 ng/dL; ]% e7 T' O! }! R* C' @* W8 w
(normal, 3 to 90 ng/dL), androstenedione was 20
9 p" k8 X9 J: N; rng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-. X: X- d: e8 f/ m$ g" ^5 H
terone was 38 ng/dL (normal, 50 to 760 ng/dL)," }- F$ D+ Z: e8 S% n
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
0 u0 l" V! W9 z% n- [/ x( ?49ng/dL), 11-desoxycortisol (specific compound S)9 u& J- O' a5 m1 U6 J
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-7 W' e0 ? I) J0 k9 k
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
% c3 ~: D; a2 t: O& _; o, g+ Ltestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
; t# C0 K3 d Jand β-human chorionic gonadotropin was less than% U5 c, W. y2 t% S2 g N! c6 ~( y
5 mIU/mL (normal <5 mIU/mL). Serum follicular% o0 E7 E" c4 c9 Q6 y5 [
stimulating hormone and leuteinizing hormone( R& T4 e4 v( h1 Z
concentrations were less than 0.05 mIU/mL/ h9 w7 @9 |- D5 D1 H
(prepubertal).6 L# j/ X0 _. W$ O( h. j$ u
The parents were notified about the laboratory& Q; N9 T: T* S3 @
results and were informed that all of the tests were6 h _! _) Y4 E; a* X# c
normal except the testosterone level was high. The% V- [* L" d2 i$ d: h) r6 {3 a
follow-up visit was arranged within a few weeks to' U) p. h" B# Y7 }
obtain testicular and abdominal sonograms; how-
i$ M1 b. W( ^; t+ @& Z( sever, the family did not return for 4 months.
& J0 \. c" F; A" m: APhysical examination at this time revealed that the! q9 R- L) l/ H% f! a. c
child had grown 2.5 cm in 4 months and had gained
( }, x9 N5 F4 e$ T& W6 C2 kg of weight. Physical examination remained
0 h) |* @0 _7 E. ]. k( _* aunchanged. Surprisingly, the pubic hair almost com-+ j1 v4 o2 z5 I6 |9 b. p' B
pletely disappeared except for a few vellous hairs at2 H7 F: M2 d( Z' ]4 {( h
the base of the phallus. Testicular volume was still 2
7 G6 k8 T* H$ k3 CmL, and the size of the penis remained unchanged.7 J& C. C; r2 z+ y# F5 C
The mother also said that the boy was no longer hav-( J& y) {& q4 T; W- N r9 u
ing frequent erections.
+ w/ N- \# ]& F; \2 U: E1 ]' JBoth parents were again questioned about use of
' S- [8 N: d8 p1 E9 m6 zany ointment/creams that they may have applied to
2 e( r2 r! b, O$ _2 D+ }the child’s skin. This time the father admitted the
8 k* f+ R; [! }! c0 G" v0 Q: @Topical Testosterone Exposure / Bhowmick et al 541
# Z/ C, c" l' W! Y! [use of testosterone gel twice daily that he was apply-. N# W3 r; P4 T
ing over his own shoulders, chest, and back area for
2 ~3 D$ \* g2 v, G% G, Ga year. The father also revealed he was embarrassed
' O0 H+ w4 n: W/ a: }to disclose that he was using a testosterone gel pre-
0 J) x3 c% J4 c( Q. P% b% b0 wscribed by his family physician for decreased libido( o- r" x7 j) c2 \( |
secondary to depression.
! l: q, ^/ N/ K1 S1 J( r' OThe child slept in the same bed with parents.
1 B! L4 J, y/ zThe father would hug the baby and hold him on his3 X' M1 w. |' j4 c
chest for a considerable period of time, causing sig-
: @# {& E: ?( J0 R# t% [* L/ unificant bare skin contact between baby and father.+ U6 a! _( ?5 g/ h
The father also admitted that after the phone call,
0 S; {6 T* ~, s$ V8 M7 F0 E2 p; \when he learned the testosterone level in the baby
5 J+ A* ~1 P7 j1 p: Y/ u. Zwas high, he then read the product information
3 X2 S3 s) P* \! Ipacket and concluded that it was most likely the rea-* A6 X* T# W: l1 }5 O
son for the child’s virilization. At that time, they
4 e1 m e7 |0 @, }decided to put the baby in a separate bed, and the
- N( z! j$ f( l2 g5 p" s5 S* u7 Ffather was not hugging him with bare skin and had
- O7 H4 |2 t2 W" w5 O9 Fbeen using protective clothing. A repeat testosterone2 w+ G0 V2 K1 Z7 m- {
test was ordered, but the family did not go to the5 y+ |1 g- J2 ?) [ b/ |# o
laboratory to obtain the test.
# O0 \ u Q7 K+ v3 Q ^Discussion8 v/ i* g- }+ y2 Z! j9 ^6 ~. K
Precocious puberty in boys is defined as secondary4 {1 B* H5 h3 w
sexual development before 9 years of age.1,4+ X6 D/ I$ c- G9 X
Precocious puberty is termed as central (true) when
8 a9 v. D' n) }$ Zit is caused by the premature activation of hypo-
0 b1 P, J2 g/ o2 G9 E. Q3 i4 `& Xthalamic pituitary gonadal axis. CPP is more com- B3 B; F! q' O, O/ b; ?
mon in girls than in boys.1,3 Most boys with CPP5 z) w% Z! ]. ^9 H9 j/ \
may have a central nervous system lesion that is$ a: V7 O2 y7 c) t. O
responsible for the early activation of the hypothal-
0 F/ m" }' Z/ R1 f: n7 V2 Kamic pituitary gonadal axis.1-3 Thus, greater empha-
2 \1 d, Y$ B" hsis has been given to neuroradiologic imaging in" ^3 u9 m! S" [ t" r O, [" h
boys with precocious puberty. In addition to viril-
0 B* Q1 W( R0 G/ u9 Gization, the clinical hallmark of CPP is the symmet-
( e$ y+ l( ^' \1 b/ Q3 m6 grical testicular growth secondary to stimulation by; M, R) n2 B9 D" M
gonadotropins.1,3
. D' ], m$ |' EGonadotropin-independent peripheral preco-( b! i9 d* J- h$ b v2 u6 k/ H1 r" H) e
cious puberty in boys also results from inappropriate
$ k# H0 y# a* F5 _$ Yandrogenic stimulation from either endogenous or) l/ N2 a" v6 y `' i
exogenous sources, nonpituitary gonadotropin stim-) D# u& E8 H# k/ P6 y( g
ulation, and rare activating mutations.3 Virilizing; L) X0 V l) V! l" U4 \* r. n
congenital adrenal hyperplasia producing excessive
% Z- c5 B) p$ K7 L( qadrenal androgens is a common cause of precocious
+ L2 p( {4 [; d/ `puberty in boys.3,4& |3 ~6 m8 c1 a1 f: z0 x
The most common form of congenital adrenal
6 N% V2 d: @6 v N1 r$ w( ihyperplasia is the 21-hydroxylase enzyme deficiency.
& q- u1 F$ ^% D0 x! gThe 11-β hydroxylase deficiency may also result in) h; j% X/ `4 M4 i* W8 Z& c
excessive adrenal androgen production, and rarely,
( ^$ D0 P; `% e" E6 U+ W: a3 Y+ }an adrenal tumor may also cause adrenal androgen5 D; p8 V8 D# ~1 {. D/ n( V
excess.1,3* w5 k5 B0 K& J* u' S2 ]
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from5 x/ Q; ~$ `% V
542 Clinical Pediatrics / Vol. 46, No. 6, July 20075 S3 [" |# [( E( H
A unique entity of male-limited gonadotropin-
/ P9 S& q# @# j1 t' x' Dindependent precocious puberty, which is also known6 q! x3 b, s4 e+ Y+ `) u: x, H
as testotoxicosis, may cause precocious puberty at a
( h) p! p% |( I" c9 l/ H6 ~& k0 nvery young age. The physical findings in these boys: X5 d! M, w/ P; U" g' t
with this disorder are full pubertal development,( N" Q( U: x l
including bilateral testicular growth, similar to boys
" Y* \+ `2 m; O" i: W, H$ m h9 ]with CPP. The gonadotropin levels in this disorder: Q6 m H- D& n% f
are suppressed to prepubertal levels and do not show
4 }% u# I: A1 V4 Tpubertal response of gonadotropin after gonadotropin-2 h7 P" \# p3 J) c8 s8 f" K
releasing hormone stimulation. This is a sex-linked/ \% ]( m0 [. \6 J- D9 s @
autosomal dominant disorder that affects only
6 H) d V8 x! D8 p' y% ]. Dmales; therefore, other male members of the family; {3 X% W# [3 B' J. @
may have similar precocious puberty.3
& k/ O' z2 P3 r. p0 y: oIn our patient, physical examination was incon-0 e. N3 R" t& g! d1 p
sistent with true precocious puberty since his testi-. J8 w" C5 [% T8 j: r* \/ F
cles were prepubertal in size. However, testotoxicosis3 R- n) Q3 b- R9 v7 f u
was in the differential diagnosis because his father
2 k$ j, P0 F3 {6 X. A! i* \9 Lstarted puberty somewhat early, and occasionally,0 k2 B+ K3 N/ f/ I0 ]- o) h5 C
testicular enlargement is not that evident in the
0 j0 Q. ^2 ?) ~9 n) F$ R1 Tbeginning of this process.1 In the absence of a neg-
% h* F: O1 x9 y2 M- @* s" y' Jative initial history of androgen exposure, our
2 @# j# b" n2 s: Q. qbiggest concern was virilizing adrenal hyperplasia,
) n5 S E- s! F$ @4 E6 Z/ zeither 21-hydroxylase deficiency or 11-β hydroxylase
|1 Z% U* E% T4 gdeficiency. Those diagnoses were excluded by find-! c9 `5 c9 O, m$ b( g
ing the normal level of adrenal steroids.
3 z" o: o+ N5 u" j% t; U0 U! EThe diagnosis of exogenous androgens was strongly
8 n; F) e* K! m! g z! ?suspected in a follow-up visit after 4 months because
* x5 {2 [2 F6 u8 e$ E# x+ s+ S( D* e3 Kthe physical examination revealed the complete disap-
1 c+ o, R) l3 m4 }/ @pearance of pubic hair, normal growth velocity, and
4 X% H8 a' y* P8 ddecreased erections. The father admitted using a testos-- h9 c* W) u1 ?
terone gel, which he concealed at first visit. He was
1 F8 c7 ~5 `3 V! r' Rusing it rather frequently, twice a day. The Physicians’
( @ d, I) ^$ w# QDesk Reference, or package insert of this product, gel or' m7 D8 N e" l5 Q3 V: ]
cream, cautions about dermal testosterone transfer to
9 M/ o2 S1 J% s% xunprotected females through direct skin exposure.! [9 p; I; u6 D' t
Serum testosterone level was found to be 2 times the
. j7 m4 \5 c; y% X, x& lbaseline value in those females who were exposed to: r' I+ N+ C. b. R
even 15 minutes of direct skin contact with their male
. U% h% ^7 J) s$ z. y" w8 I$ `; cpartners.6 However, when a shirt covered the applica-
# |6 _( i4 `2 E& btion site, this testosterone transfer was prevented.
4 |2 |( I+ u: }* n- E* L! v8 a5 MOur patient’s testosterone level was 60 ng/mL,
$ b9 A! n: s9 o6 Y0 Dwhich was clearly high. Some studies suggest that
) j& T4 w$ C7 z" Edermal conversion of testosterone to dihydrotestos-: b4 W) ?- A8 _, v! F
terone, which is a more potent metabolite, is more
- a$ r3 {( t7 _0 o' k+ q$ {0 Aactive in young children exposed to testosterone! U/ m" C) @9 p" G/ I0 x3 c, }7 K' S
exogenously7; however, we did not measure a dihy-
0 Y. N9 E5 R" ^2 ]& k ^6 Cdrotestosterone level in our patient. In addition to
( K }- f# u' _3 |virilization, exposure to exogenous testosterone in% D1 d9 D( e+ _, c" G" R
children results in an increase in growth velocity and6 ~5 ~0 u( T k
advanced bone age, as seen in our patient.
7 g' W- l0 ~9 e7 g2 cThe long-term effect of androgen exposure during
( |) B$ B; s5 T$ D) V+ @. hearly childhood on pubertal development and final* ^" L! W2 _8 M5 ]8 u
adult height are not fully known and always remain6 k+ }; l/ a4 C8 m
a concern. Children treated with short-term testos-
8 y! B: T0 x4 v qterone injection or topical androgen may exhibit some
& X+ w$ ]! `0 F$ Y5 L' J. }acceleration of the skeletal maturation; however, after
/ ]# c; K( [1 D$ Scessation of treatment, the rate of bone maturation/ u7 k- D6 _& @3 N5 C( V2 U8 w
decelerates and gradually returns to normal.8,9# g5 w+ k$ M1 ?& Y# _' ]
There are conflicting reports and controversy2 R; F7 G9 G' s* @/ _' U
over the effect of early androgen exposure on adult
9 z) n. U a6 Fpenile length.10,11 Some reports suggest subnormal
8 G, w8 m! d- z' F4 I8 sadult penile length, apparently because of downreg-
* b0 b) p% E/ D% }3 T+ Iulation of androgen receptor number.10,12 However,
5 [- I2 j% T% u) KSutherland et al13 did not find a correlation between, v3 H1 m) t, M b0 ]# I) A3 r
childhood testosterone exposure and reduced adult- l: ?9 J) E' x7 @8 U6 C8 q. y
penile length in clinical studies.
5 z; W: ^! _2 z) I, }* H3 U+ y1 TNonetheless, we do not believe our patient is8 g4 g3 [0 {+ C0 D
going to experience any of the untoward effects from8 x% \: d/ F: e6 B) @
testosterone exposure as mentioned earlier because
' L7 b V" R. n% X' ^8 ~5 cthe exposure was not for a prolonged period of time.
$ X& H" X' R( v% p' LAlthough the bone age was advanced at the time of1 f" _( }8 E5 o! e
diagnosis, the child had a normal growth velocity at1 ?. M! x7 B: R+ i. F3 u
the follow-up visit. It is hoped that his final adult* R" \5 n/ o# `" @' A; T: j0 }+ @$ T
height will not be affected.
9 v/ n# j* E8 i0 uAlthough rarely reported, the widespread avail-
* M3 o/ r; Q: Rability of androgen products in our society may8 P5 K0 e2 L P& W2 w3 | j) |
indeed cause more virilization in male or female
0 T, _* c f- r# f# b+ y0 mchildren than one would realize. Exposure to andro-8 e9 A% R' X! Z }, A' s- z" ?
gen products must be considered and specific ques-: I1 c$ p$ D* ]! y
tioning about the use of a testosterone product or
" L* x6 l& {( B1 wgel should be asked of the family members during
# ?; D& v g7 x, ]7 _4 I8 c5 sthe evaluation of any children who present with vir-/ w5 z( ^( D N
ilization or peripheral precocious puberty. The diag-/ V& f ^' ]( l4 x0 Q& N
nosis can be established by just a few tests and by+ j4 h) j- z! J" T) n; @1 O
appropriate history. The inability to obtain such a% b: _- y9 }6 a1 H9 I
history, or failure to ask the specific questions, may
1 j/ }4 j$ c+ @- {1 Nresult in extensive, unnecessary, and expensive
4 `8 z# Z s0 r8 f/ Z& \2 {, ~investigation. The primary care physician should be
( t9 q8 U/ k4 T( c) aaware of this fact, because most of these children0 s$ I. X0 a( x& v$ Q
may initially present in their practice. The Physicians’
3 G: q, X) }: t+ l( i4 bDesk Reference and package insert should also put a
& w5 K( ]+ u9 S# kwarning about the virilizing effect on a male or# f3 W7 ]& T" j
female child who might come in contact with some-# d6 |$ _2 f8 a
one using any of these products.
' Z, m1 ?" B' r2 fReferences* ~7 y/ k7 W0 J$ n
1. Styne DM. The testes: disorder of sexual differentiation
, t& u$ N' M' @$ h" x6 }and puberty in the male. In: Sperling MA, ed. Pediatric8 m* m8 u4 l# z0 O7 j. L
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;- N) T- P9 C+ I5 X2 J( d; I0 N9 d
2002: 565-628.1 c7 R( W) R4 T( h0 q0 Y) y
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious' s* w3 x' J: H, h$ W% `0 [$ \" h
puberty in children with tumours of the suprasellar pineal H5 B' T" t! c' B2 C2 J j
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 {: |8 U8 Z7 T* M
Topical Testosterone Exposure / Bhowmick et al 543
4 Y% @3 Y6 A( s5 Zareas: organic central precocious puberty. Acta Paediatr.: @* w7 M1 Z! q0 z
2001;90:751-756.
4 _; B/ {/ s1 d' H3 p: C7 W3 \& ~" L3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed./ y! `# D; l6 r; e, j
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
* b& ?/ s' T1 I0 d7 i- RDekker Inc; 2003:211-238.
9 L( l$ B) ?2 q6 }4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual% N" ?' n7 n/ ?, k- ]9 _
development in a two-year-old boy induced by topical
' _# R+ q$ l9 Cexposure to testosterone. Pediatrics. 1999;104:e23.
# ?" F" q; ^ D. f* ~- K$ y: I! M5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
$ h. u) o+ n; j: A5 l% s2 ^* PSkeletal Development of the Hand and Wrist. 2nd ed.
2 g& j d2 H# d' CStanford, CA: Stanford University Press; 1959.) X% O( F' r- A
6. Physicians’ Desk Reference. Androgel 1% testosterone,
7 Z, _' `1 Q4 Z9 I8 X0 |) z1 gUnimed Pharmaceutical Inc. Montvale, NJ: Medical: {" y9 O+ @, Z
Economics Company, Inc; 2004:3239-3241.$ s5 U, \1 N5 U3 ^% m* b8 W
7. Klugo RC, Cerny JC. Response of micropenis to topical
$ f( S' [5 Z. ~testosterone and gonadotropin. J Urol. 1978;119:
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