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is a significant concern for physicians. Central
1 P" x1 I% Z! z) x& x5 Sprecocious puberty (CPP), which is mediated; ?/ u( }! v1 h f! Q5 j$ ~
through the hypothalamic pituitary gonadal axis, has4 |; a3 C4 L1 Q4 M
a higher incidence of organic central nervous system
* X) ^6 p: X- Y0 S! n0 b" elesions in boys.1,2 Virilization in boys, as manifested3 D9 T2 I; s1 G+ Q
by enlargement of the penis, development of pubic
. Q6 c4 n% Q! `hair, and facial acne without enlargement of testi-* o3 s( ~+ G* X- V# Z( M
cles, suggests peripheral or pseudopuberty.1-3 We/ U9 b( {/ Z% H8 H
report a 16-month-old boy who presented with the
4 z$ c$ r7 p+ f, r6 r8 Kenlargement of the phallus and pubic hair develop-0 N1 e6 y! z- W. z: s+ a) A. { S( `
ment without testicular enlargement, which was due# M; `& L0 a$ K$ Q# A8 R8 ^0 }8 O. |9 ]
to the unintentional exposure to androgen gel used by, u$ ^, w, `/ M; l; ]+ |3 v7 s
the father. The family initially concealed this infor-
9 V% b X9 h! w6 Y' U, _mation, resulting in an extensive work-up for this7 p6 ]5 K5 O( m/ X7 N4 C
child. Given the widespread and easy availability of4 B7 _6 `1 ^# G. l
testosterone gel and cream, we believe this is proba-7 y# {8 [- s' ^
bly more common than the rare case report in the8 ]# \9 K; R/ C! B6 x9 X, q2 r
literature.4
; v& u) k2 G1 T' Q* Z; x OPatient Report! F) T. y6 R4 S4 s" h
A 16-month-old white child was referred to the
+ X, F' |5 u1 c7 L4 J% Qendocrine clinic by his pediatrician with the concern
7 g8 I/ f' l7 A, P# @of early sexual development. His mother noticed
& s$ S1 V! |( \8 @9 Dlight colored pubic hair development when he was
2 f0 h& ]" q2 k( q- \9 WFrom the 1Division of Pediatric Endocrinology, 2University of
5 ^9 K. D, s. ySouth Alabama Medical Center, Mobile, Alabama.* l/ |7 D6 D& I* b2 Y/ q
Address correspondence to: Samar K. Bhowmick, MD, FACE, p6 |- W, Q1 q3 Y' N
Professor of Pediatrics, University of South Alabama, College of5 A: G8 _8 `- P5 G! j/ d/ M& e; F
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;) n# U, N a4 f v; E/ ]& F" p
e-mail: [email protected].' D# `& n0 z+ V' N
about 6 to 7 months old, which progressively became
3 g2 J; Z% ?- e/ z1 C# t$ P$ Zdarker. She was also concerned about the enlarge-
3 Y4 Z5 {( p5 d }; [0 J4 hment of his penis and frequent erections. The child7 h7 n' {; f, C" {' Q
was the product of a full-term normal delivery, with9 V- R1 u6 c+ o/ p8 C
a birth weight of 7 lb 14 oz, and birth length of
8 K2 ^. T" X" D% Q4 ?20 inches. He was breast-fed throughout the first year% t8 u9 t8 g$ o3 R
of life and was still receiving breast milk along with
0 Y; ?5 u/ `) g" Wsolid food. He had no hospitalizations or surgery,3 b1 P: [: f7 [1 P! B
and his psychosocial and psychomotor development
: A2 U1 a3 _ i7 i6 Y5 r: T& [" ywas age appropriate.. D0 ?( w- ^7 D" c* g5 o+ }
The family history was remarkable for the father,
" u h' [% k; Ywho was diagnosed with hypothyroidism at age 16,
3 F' G! @+ ^% s/ J y* Bwhich was treated with thyroxine. The father’s
( ~! c. t, c6 q1 J6 dheight was 6 feet, and he went through a somewhat
# {; M9 e1 w3 g+ R$ vearly puberty and had stopped growing by age 14.
& g- z3 O7 p% F8 u5 YThe father denied taking any other medication. The/ ]3 g% `- t! s" b) O' x
child’s mother was in good health. Her menarche
8 c' G6 @2 q- h& ^3 _2 rwas at 11 years of age, and her height was at 5 feet: E/ c# W7 h; H. k+ c' L! O. z$ e
5 inches. There was no other family history of pre-
) F; k% i8 H g9 c- Ycocious sexual development in the first-degree rela-
* l* M4 E0 [2 `, b. H% l' P1 e# Itives. There were no siblings.2 _( }+ G: J. n6 l& I1 b
Physical Examination
4 a1 L8 i6 c/ N; {) x0 k. P. _The physical examination revealed a very active,
5 B9 _6 `4 Q) mplayful, and healthy boy. The vital signs documented
, s& ~* r5 l0 s8 t# m. ga blood pressure of 85/50 mm Hg, his length was
3 }& R b% u. i5 U9 L2 g90 cm (>97th percentile), and his weight was 14.4 kg
6 w4 ^ ]9 n7 `; h(also >97th percentile). The observed yearly growth2 |1 ~7 ]% f0 X! U; O3 C
velocity was 30 cm (12 inches). The examination of1 |# B) r* }/ {" ?
the neck revealed no thyroid enlargement.
6 t: y' [2 Z' M$ Z5 WThe genitourinary examination was remarkable for
1 Q0 a' {+ {' V* Tenlargement of the penis, with a stretched length of5 D/ F8 M+ B. G! f$ K8 F. G9 F
8 cm and a width of 2 cm. The glans penis was very well
1 T# Y- Y/ b# h: j7 w; ~developed. The pubic hair was Tanner II, mostly around
# J8 H) t E E540/ f& A/ Y: F& M$ K# @
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: }. C7 S& H X* G. [, e8 Sthe base of the phallus and was dark and curled. The
3 S+ Z* H6 F4 d0 ttesticular volume was prepubertal at 2 mL each.& x, a0 l9 @9 J, Z B N+ ]
The skin was moist and smooth and somewhat+ ~+ }; O P5 v7 L1 j a& F
oily. No axillary hair was noted. There were no
6 k- q6 k, Q6 A$ [) M; ?) X+ kabnormal skin pigmentations or café-au-lait spots.! D3 ^/ i5 ?% T" K- H8 L9 D
Neurologic evaluation showed deep tendon reflex 2+
2 U b# g' S( ^2 s4 mbilateral and symmetrical. There was no suggestion
1 C7 ~' Q2 S( S. @& U* z: Xof papilledema.
- h- W* Z* M" d" k1 Z/ ?% bLaboratory Evaluation0 }. b7 c7 [: ?) w
The bone age was consistent with 28 months by
9 g5 v* v; n( r! E: b% ousing the standard of Greulich and Pyle at a chrono-
- l0 ?) S1 ?% ~( x- B' u" i& vlogic age of 16 months (advanced).5 Chromosomal1 c5 Z* @! p" Y# d
karyotype was 46XY. The thyroid function test
# j: H1 }' g# D/ L1 X K4 j1 Wshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
0 ]. H. A- ~" K5 h' q9 \# o9 K6 Z/ [lating hormone level was 1.3 µIU/mL (both normal).
, L" \! B: r3 qThe concentrations of serum electrolytes, blood
. q) S; C% h) O: U8 ]7 Aurea nitrogen, creatinine, and calcium all were) w2 R8 P/ g; c$ v2 }
within normal range for his age. The concentration+ ?& \8 ~/ R% H) i. t2 b8 n
of serum 17-hydroxyprogesterone was 16 ng/dL5 j2 p: V8 z, S7 S& i
(normal, 3 to 90 ng/dL), androstenedione was 20+ Z% E# z% P4 J: W
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-( P$ F8 m# n6 {4 F1 s O# O
terone was 38 ng/dL (normal, 50 to 760 ng/dL),' ?) {1 I! |' [ T
desoxycorticosterone was 4.3 ng/dL (normal, 7 to* {/ V2 X( E* C5 W- G- o+ w
49ng/dL), 11-desoxycortisol (specific compound S)* x0 ^! C) F4 x& i
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-4 c: [; \! k/ ]- y/ K8 g* r1 r
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
. [' R1 h0 ^0 b/ f3 W" [testosterone was 60 ng/dL (normal <3 to 10 ng/dL),+ Y& f5 w W# u* ^1 O( d
and β-human chorionic gonadotropin was less than
* p' W6 ^1 ^/ l, A5 mIU/mL (normal <5 mIU/mL). Serum follicular
3 f% d3 _4 v, x5 \stimulating hormone and leuteinizing hormone
% Y# b* Y! \9 k8 E$ sconcentrations were less than 0.05 mIU/mL5 c5 ~% z8 b. ?% x
(prepubertal).% a8 ~' [0 L7 L/ A( W
The parents were notified about the laboratory4 A8 a( i d6 ]! }6 r z9 h
results and were informed that all of the tests were
2 Q2 q& {+ H3 i, e& l/ B S9 y; z+ j! ^normal except the testosterone level was high. The. A( s) |+ X8 U8 y, Y
follow-up visit was arranged within a few weeks to
+ Z; \! a- [$ g7 r9 R! \! ^8 mobtain testicular and abdominal sonograms; how-
# N8 i1 W( {0 g/ a: L, D( i0 Bever, the family did not return for 4 months.
. x2 C" P' x% P/ cPhysical examination at this time revealed that the) w7 ]0 B. @* f% y3 Y* ?
child had grown 2.5 cm in 4 months and had gained
" g( z n1 @; i" ^2 P# t) |, F2 kg of weight. Physical examination remained, J7 d* H' n. Q- L' ^' x
unchanged. Surprisingly, the pubic hair almost com-
) A# _/ v( k, U) |% b7 rpletely disappeared except for a few vellous hairs at$ a. J- d& Q2 P2 u: S8 M
the base of the phallus. Testicular volume was still 2+ r/ O/ u3 h) V4 E# `0 e+ W
mL, and the size of the penis remained unchanged.( C6 m6 o1 c! ]. ~0 t! y
The mother also said that the boy was no longer hav-
' I* c0 d( S& |7 m% F0 F+ @# Ving frequent erections.
' L# e- t$ \4 YBoth parents were again questioned about use of
' d1 k4 T; Q0 P" D( b% Nany ointment/creams that they may have applied to& X& |4 L9 V E9 c0 k
the child’s skin. This time the father admitted the# v% Z2 p3 P- G
Topical Testosterone Exposure / Bhowmick et al 5415 U2 l. V. K0 i" J- z6 j8 Q
use of testosterone gel twice daily that he was apply-$ ]3 w& |4 F) o3 N; R7 {
ing over his own shoulders, chest, and back area for/ A2 H9 d( j$ j
a year. The father also revealed he was embarrassed6 U1 d# X- d. \- `, J9 M
to disclose that he was using a testosterone gel pre-
1 u* |3 ? x: ]; D+ {. Bscribed by his family physician for decreased libido4 P7 `3 C! J ?& D
secondary to depression.+ D. a3 ]! D |
The child slept in the same bed with parents.( c+ q7 r3 e+ ~3 r5 e) P! @
The father would hug the baby and hold him on his
- q2 M+ Z# P- ^- V3 ychest for a considerable period of time, causing sig-, ~, I7 b9 c4 n1 k, f+ U
nificant bare skin contact between baby and father.) R: m/ G6 B+ B; Y
The father also admitted that after the phone call,* j9 W& n* `! a7 l( F8 V% ^
when he learned the testosterone level in the baby9 ~ N+ J1 N' W D B; n& j) g E
was high, he then read the product information
; u& B. H1 M. }4 c9 I: {packet and concluded that it was most likely the rea-" n# v- G; V9 b, U( g
son for the child’s virilization. At that time, they
/ K: A( }" Z7 q! ?% n( i( K- ddecided to put the baby in a separate bed, and the
- r0 q9 a8 B" O4 ]+ C: h) r! Efather was not hugging him with bare skin and had
( e. o% b! h) l6 p7 ?been using protective clothing. A repeat testosterone/ F b5 b! x' g: g* o6 v2 i; E' [
test was ordered, but the family did not go to the! @$ a' {0 D v g
laboratory to obtain the test.8 ]1 t$ a6 R; V) |/ ]$ w4 Y. B
Discussion
$ {' Y* \0 P: ~+ I& }- TPrecocious puberty in boys is defined as secondary
/ [5 [) {% M- [6 P+ t: |- Rsexual development before 9 years of age.1,4# m2 |# m4 F: L; V0 F" m
Precocious puberty is termed as central (true) when
5 f. Q. z; w. X$ Y' \- d: L- ~it is caused by the premature activation of hypo-
6 ?- k0 T- j/ Z3 ]( G W% X1 Athalamic pituitary gonadal axis. CPP is more com-* K& r. M3 A2 t. G5 l$ b1 r" w
mon in girls than in boys.1,3 Most boys with CPP
2 _+ {2 H' Z7 P0 n1 T" X! z. Xmay have a central nervous system lesion that is- R; z% r8 k$ x: v+ B+ C
responsible for the early activation of the hypothal-
/ Y! R) Z. O! y' H* l# V, l* D2 xamic pituitary gonadal axis.1-3 Thus, greater empha-
6 `1 z5 |& T" usis has been given to neuroradiologic imaging in* @. ~$ u$ V9 O8 c' \
boys with precocious puberty. In addition to viril-
+ j8 `7 ^: P4 L% @" [1 iization, the clinical hallmark of CPP is the symmet- ]! y, X' V9 J% {' _
rical testicular growth secondary to stimulation by
" \4 K: h6 L" X7 U' Z0 |+ s' X+ ~3 kgonadotropins.1,3/ v% l8 c! p& f* Y# {1 I) x
Gonadotropin-independent peripheral preco-6 ?9 E7 i3 r3 }* u1 F2 _" Q: Q
cious puberty in boys also results from inappropriate4 w% ^. p0 I* [9 j
androgenic stimulation from either endogenous or
# b2 K* U0 S6 A) m: h2 E4 q9 E' f2 Aexogenous sources, nonpituitary gonadotropin stim-( y" ~* N' @& _2 e) T5 i
ulation, and rare activating mutations.3 Virilizing
6 L P* n% O" qcongenital adrenal hyperplasia producing excessive" N: Z! g9 J# ] j- q9 a( _
adrenal androgens is a common cause of precocious3 w& q/ H; [2 j2 f" x) X8 b1 a
puberty in boys.3,4
( c7 Q$ m% i8 f( m/ s' bThe most common form of congenital adrenal! Y% ^! o* Z9 @" p
hyperplasia is the 21-hydroxylase enzyme deficiency.
8 y& N, B! p" MThe 11-β hydroxylase deficiency may also result in
6 p: X0 [9 ]( Jexcessive adrenal androgen production, and rarely,
6 O. i7 _' d I. u Can adrenal tumor may also cause adrenal androgen
, {& ~- d* N; z# \& Fexcess.1,31 i, ^; I9 g; Q5 s
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from Z/ F, e( ~2 ?' K
542 Clinical Pediatrics / Vol. 46, No. 6, July 20079 y. B8 }) v' w
A unique entity of male-limited gonadotropin-5 s c0 K& d C* ~% t/ m, a) r. L
independent precocious puberty, which is also known& p: d F- P4 g& v+ s7 n O. F. O
as testotoxicosis, may cause precocious puberty at a% j$ C) ~& Y( r' e( A
very young age. The physical findings in these boys
; U- C2 S) P! ]with this disorder are full pubertal development,
% `3 _7 `: n( e( hincluding bilateral testicular growth, similar to boys
! ~+ _" B* s2 q+ s7 q- g* y @with CPP. The gonadotropin levels in this disorder% a$ O; |9 g' H6 b+ g
are suppressed to prepubertal levels and do not show
: F( K# K4 } ]: F* z0 \( |pubertal response of gonadotropin after gonadotropin-9 M! X4 J# d; B
releasing hormone stimulation. This is a sex-linked: d5 g1 ~4 i# S. l6 o. k2 w/ x
autosomal dominant disorder that affects only
7 z; [/ s; H# e; Cmales; therefore, other male members of the family
. Y- p1 W1 D, ^# ymay have similar precocious puberty.3
/ }7 T7 l* @6 t4 k$ kIn our patient, physical examination was incon-+ |2 ]* o/ \3 D5 \( n, ^+ e4 z8 [( A
sistent with true precocious puberty since his testi-# v) W! F4 M( E( Q; v8 {; r
cles were prepubertal in size. However, testotoxicosis
( ~8 Z% F1 e) M" U, }% n6 Rwas in the differential diagnosis because his father) ], x- A$ M" g0 ]/ h
started puberty somewhat early, and occasionally,
" e+ d, n- J" K' P8 Wtesticular enlargement is not that evident in the
5 n6 c5 j+ Q* ]. I6 a8 ?% Jbeginning of this process.1 In the absence of a neg-8 c0 s* M& d3 `' F% G
ative initial history of androgen exposure, our: Y1 } ~& t1 q) X4 R2 ~; ?! t- [
biggest concern was virilizing adrenal hyperplasia,# @* y( s0 u. L" N
either 21-hydroxylase deficiency or 11-β hydroxylase
b- }* i V# J' Q( wdeficiency. Those diagnoses were excluded by find-+ Q& V/ J9 v3 A B/ B M0 L
ing the normal level of adrenal steroids.. _/ v/ b3 u7 {0 P
The diagnosis of exogenous androgens was strongly
1 P! W0 b$ O, x1 Fsuspected in a follow-up visit after 4 months because; m- h3 c9 d- h; E7 Q
the physical examination revealed the complete disap-
+ Q/ [0 k) \0 k0 lpearance of pubic hair, normal growth velocity, and
/ V- g* Q7 V6 _* M2 bdecreased erections. The father admitted using a testos-
0 N" y6 h5 S. T: t1 A' ^terone gel, which he concealed at first visit. He was- R! h. u n+ y+ ~7 r
using it rather frequently, twice a day. The Physicians’
, A# d' f4 G# G5 O0 YDesk Reference, or package insert of this product, gel or
. @2 F* k/ m1 k5 K! bcream, cautions about dermal testosterone transfer to
# r4 T7 a, L5 D8 k& @unprotected females through direct skin exposure.9 X2 `2 s# D8 Y" c3 N' N, L
Serum testosterone level was found to be 2 times the
. F5 `! M3 [3 y) n! _; Tbaseline value in those females who were exposed to
2 O% n8 V6 Z6 @6 P1 s/ p7 w$ U/ Neven 15 minutes of direct skin contact with their male
7 t; L; m- j" b- L1 p7 C6 opartners.6 However, when a shirt covered the applica-( x! H5 }% t! W% B* o! }! _1 }
tion site, this testosterone transfer was prevented.
" i+ t/ R" x& e$ U: sOur patient’s testosterone level was 60 ng/mL,
: ]0 J# w# O3 D' Twhich was clearly high. Some studies suggest that
- ?0 u5 Q% s7 m5 y* X/ Kdermal conversion of testosterone to dihydrotestos-' N6 A6 c' J2 l3 U" L
terone, which is a more potent metabolite, is more4 r8 k5 u7 ]$ S, S# @
active in young children exposed to testosterone& r$ P' f+ ]$ [8 N A( V
exogenously7; however, we did not measure a dihy-/ G, J, G" }) e, H9 v( ]
drotestosterone level in our patient. In addition to8 u) I. P3 U; g* R
virilization, exposure to exogenous testosterone in8 A: L+ O6 f: C% v% C0 h% P3 C
children results in an increase in growth velocity and
' E( ^$ u! C l6 \4 ~advanced bone age, as seen in our patient.4 K' q+ n4 N4 j+ q5 H
The long-term effect of androgen exposure during; }" u' k2 u$ g+ e) f# k- K
early childhood on pubertal development and final. p% r. p& p% \+ g2 ^+ d1 z
adult height are not fully known and always remain5 {1 U* m5 Z3 u
a concern. Children treated with short-term testos-2 N6 g" h) r; ~( X8 W2 u+ Z
terone injection or topical androgen may exhibit some( H8 Y x- d5 ~6 {
acceleration of the skeletal maturation; however, after: ^) T* [% d7 }4 d5 i0 T* s% K5 b% z. R
cessation of treatment, the rate of bone maturation
1 Q: I% w R) I8 E% K3 Gdecelerates and gradually returns to normal.8,92 ~& o7 }% x6 z. v: X
There are conflicting reports and controversy
1 \) }6 F5 L: p9 |# P9 qover the effect of early androgen exposure on adult( \( Z q3 E$ e- d
penile length.10,11 Some reports suggest subnormal/ @8 d( F2 ~+ P6 q( N( Y
adult penile length, apparently because of downreg-; X7 o! z. T9 }; Z/ h
ulation of androgen receptor number.10,12 However,; h9 |. o9 P. y1 ~) F
Sutherland et al13 did not find a correlation between
2 m/ w% [( x y/ n! uchildhood testosterone exposure and reduced adult$ R3 e- N& d' f; w$ w) p! i/ P
penile length in clinical studies.
( {. p8 H9 @1 G% \Nonetheless, we do not believe our patient is
- S I( J0 V) ?9 `1 H2 qgoing to experience any of the untoward effects from
9 t/ a$ g1 ^# h5 Ltestosterone exposure as mentioned earlier because
# T8 z6 F9 l: q- x" D/ l) lthe exposure was not for a prolonged period of time.' W/ v- C) {, X2 E, t
Although the bone age was advanced at the time of% |. d& X9 G# {3 f0 \
diagnosis, the child had a normal growth velocity at8 I* p# |& x, B' u! a
the follow-up visit. It is hoped that his final adult
* W# ~5 b9 b$ S7 ^, Vheight will not be affected.& e e4 x2 O& S# p7 {$ K; ~+ z
Although rarely reported, the widespread avail-
* ?2 Z# B& Z( I5 g8 p* x- Kability of androgen products in our society may. X v+ X2 P& O8 h$ ?
indeed cause more virilization in male or female
6 a! a1 l0 P4 t/ X0 C$ E: qchildren than one would realize. Exposure to andro-9 z( \- k7 A7 s5 S
gen products must be considered and specific ques-$ m3 q5 \- Y4 }! u9 @$ _4 l, H7 y
tioning about the use of a testosterone product or
0 ^3 U t; m; Z5 jgel should be asked of the family members during
" x# D6 P0 ~- m' y" Hthe evaluation of any children who present with vir-
" h$ s0 c( A2 t5 d% b' c$ Ailization or peripheral precocious puberty. The diag-3 M( K4 p; Q ~ ` i
nosis can be established by just a few tests and by
" w8 @5 U7 K. T' Dappropriate history. The inability to obtain such a# H) q6 ]% I0 H, D# N
history, or failure to ask the specific questions, may
& r$ L" h+ }/ P, e" w0 tresult in extensive, unnecessary, and expensive* U6 b3 y/ T8 G) b" p7 K
investigation. The primary care physician should be3 a/ p& B1 ~2 Y" v8 R% o
aware of this fact, because most of these children* ~- u6 `( ^. I+ ?2 g
may initially present in their practice. The Physicians’
8 g4 U! V7 r: x7 J! e* ADesk Reference and package insert should also put a& m6 l6 K, R/ g7 M5 z, k
warning about the virilizing effect on a male or
. B+ H: f6 @! R8 T$ Efemale child who might come in contact with some-
! y5 c# e3 U5 r6 G: c4 d/ i" Gone using any of these products.
7 ~3 q- W& p! O& y" HReferences5 v5 y) @0 H( F! a0 j& k' R
1. Styne DM. The testes: disorder of sexual differentiation
8 |" b7 i" r" U; ^and puberty in the male. In: Sperling MA, ed. Pediatric/ X9 s/ j. C$ H
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
8 W8 L/ d2 g9 @. p9 d6 ^2002: 565-628.
, Q+ S2 b% j* L3 A9 c2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
* s. P) A7 O+ D. \3 Bpuberty in children with tumours of the suprasellar pineal6 p5 T+ ^ p) a& ]- ]
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) O/ w z2 o8 D8 B
Topical Testosterone Exposure / Bhowmick et al 543. h1 f1 y6 R% k/ M1 }* q, O' [
areas: organic central precocious puberty. Acta Paediatr.
. j$ z+ ~3 m: @2 D8 |2 E! \2001;90:751-756.
" W* _; P5 i# W3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.3 X5 S, ~9 |* m* S1 N% C6 W
Pediatric Endocrinology. 4th ed. New York, NY: Marcel6 p4 v* V0 C2 U. y4 a
Dekker Inc; 2003:211-238./ j# r, s; ~% L# _: L
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual2 ?+ k5 g J: x5 z8 V4 R
development in a two-year-old boy induced by topical
4 G, ~: n( u" bexposure to testosterone. Pediatrics. 1999;104:e23." |8 E$ L \* E/ E; K
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
6 v4 d* W/ t/ L" w, S( ]Skeletal Development of the Hand and Wrist. 2nd ed.
) F3 @" K8 K$ _) @& aStanford, CA: Stanford University Press; 1959.
7 A, l$ I- H1 c' ~5 l$ B* s) x6. Physicians’ Desk Reference. Androgel 1% testosterone,; U, F! e: r( i6 o
Unimed Pharmaceutical Inc. Montvale, NJ: Medical& n; _" t5 ~- ^: G: S( r3 }9 i8 o
Economics Company, Inc; 2004:3239-3241.
/ ^. P% ^4 S8 X' ?7. Klugo RC, Cerny JC. Response of micropenis to topical* t8 W+ |; E/ r, A
testosterone and gonadotropin. J Urol. 1978;119:
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