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is a significant concern for physicians. Central
' w# [7 [9 T' s$ O. O6 {precocious puberty (CPP), which is mediated- C6 K# c6 r0 |. m+ G. x5 p5 r
through the hypothalamic pituitary gonadal axis, has
5 c7 s3 U2 F& E: X0 o8 T& Y2 sa higher incidence of organic central nervous system
* H( o6 F$ |% D( b! slesions in boys.1,2 Virilization in boys, as manifested! @# H% m3 s1 a4 G/ g* }3 |' U
by enlargement of the penis, development of pubic
$ J/ d w0 u3 F9 ~& D3 _; O* qhair, and facial acne without enlargement of testi-1 W+ i5 W T9 m- {
cles, suggests peripheral or pseudopuberty.1-3 We2 z) V4 A+ s8 T8 b) [2 M$ ~+ K
report a 16-month-old boy who presented with the) ~4 D2 M; x2 f7 {
enlargement of the phallus and pubic hair develop-' J' {3 s% u. H! J; e
ment without testicular enlargement, which was due
$ {6 U. o6 @7 {- U, ^3 i4 { k& |to the unintentional exposure to androgen gel used by
4 f# u" u1 `( H3 o; E1 `the father. The family initially concealed this infor-
6 M( V: i% }& P+ J" q* b7 Y$ g hmation, resulting in an extensive work-up for this
4 U5 k6 b. L7 q! V1 @5 T$ Schild. Given the widespread and easy availability of) I# @% f/ U" b, t
testosterone gel and cream, we believe this is proba-- ~6 S6 n. h$ g8 Q. y% m
bly more common than the rare case report in the
c4 J9 i7 Q$ S* Vliterature.4
, {# _: S4 Y) XPatient Report
5 ~8 k' R' Q7 s) v' D, I1 t* z4 O0 t: sA 16-month-old white child was referred to the
2 E8 e0 T7 `% S8 @" C+ Q! Oendocrine clinic by his pediatrician with the concern! \' q6 ?: f6 @8 i6 g: p
of early sexual development. His mother noticed" s8 O; ~6 }! z- [. g) L: L
light colored pubic hair development when he was
$ N0 P$ ?- b9 r" X" }4 q( gFrom the 1Division of Pediatric Endocrinology, 2University of
+ H0 ?& F" R2 T6 p) ASouth Alabama Medical Center, Mobile, Alabama.
1 n& g; ?1 {2 N4 D, S: mAddress correspondence to: Samar K. Bhowmick, MD, FACE,8 R0 A) T; j; r- Q. d. w
Professor of Pediatrics, University of South Alabama, College of
$ K) Y2 g7 S- _2 C( w& vMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;3 I6 a7 j' _) H3 z& \4 ^9 o
e-mail: [email protected].
" B1 d- v9 ^( @. o* vabout 6 to 7 months old, which progressively became: ^0 Y7 ?- R4 l2 H; U
darker. She was also concerned about the enlarge- z! W" F0 a1 y, _: o
ment of his penis and frequent erections. The child
' ^2 [" R" [0 \. o! D- _% I8 N+ cwas the product of a full-term normal delivery, with
% j7 I7 a `$ g9 c' V7 z9 Ca birth weight of 7 lb 14 oz, and birth length of$ G6 _6 H: R- G" p9 I/ R' Y
20 inches. He was breast-fed throughout the first year' y. a y1 x5 ^2 |* n
of life and was still receiving breast milk along with M! R/ J, s) e. Q
solid food. He had no hospitalizations or surgery,% k$ i& `0 A; y' Z9 p
and his psychosocial and psychomotor development' d# u( K/ o _! R
was age appropriate.
/ s7 A: j! z: {( u* uThe family history was remarkable for the father,
I6 D1 q5 t/ B3 Dwho was diagnosed with hypothyroidism at age 16,
( E. x1 _" Y: R8 d4 i6 ?8 C7 Y- ~which was treated with thyroxine. The father’s" W2 n5 u9 @0 ?0 F+ i
height was 6 feet, and he went through a somewhat
8 ^0 [, e% b( o. a( _3 D( oearly puberty and had stopped growing by age 14.
! \( A" s. G. o. t9 E/ @7 xThe father denied taking any other medication. The
" Z; L7 |2 K8 W! E3 B* [! k8 Z5 uchild’s mother was in good health. Her menarche
/ f6 f9 K3 p; \: W6 Nwas at 11 years of age, and her height was at 5 feet
1 b3 ~; u7 N6 a5 inches. There was no other family history of pre-8 T" X8 n G. ]: ^ x
cocious sexual development in the first-degree rela-4 c/ d% P6 n/ R* @/ C! P/ a/ m
tives. There were no siblings.* h1 I4 R& Z. u. l- j
Physical Examination
# D/ }! T# M1 I5 ?/ I* p! YThe physical examination revealed a very active,
( O5 V9 \# I5 ~- V+ z$ V0 N# R( D: pplayful, and healthy boy. The vital signs documented, t3 j: A1 i+ |" D6 j2 m) A3 Y; @2 K
a blood pressure of 85/50 mm Hg, his length was
: i1 F9 S7 @8 f. c90 cm (>97th percentile), and his weight was 14.4 kg
2 O. o* Z8 s5 K. Z @; G& g(also >97th percentile). The observed yearly growth, C; @& X$ V* ~7 R
velocity was 30 cm (12 inches). The examination of* N# O! y X' D) Z0 y+ [1 s: U
the neck revealed no thyroid enlargement.4 M3 Q$ C; s5 n' B) `9 n/ Q
The genitourinary examination was remarkable for* m( U3 |5 x( w3 f
enlargement of the penis, with a stretched length of- ^* l5 {* ^' I: H; A
8 cm and a width of 2 cm. The glans penis was very well
" _. U* ]% Z1 _- Z4 k V) ^developed. The pubic hair was Tanner II, mostly around8 r7 D& d( U+ g4 M
540. z, y; z7 q2 ^. z6 |+ I
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x Y1 g, k3 P' c" Fthe base of the phallus and was dark and curled. The
. Z; `1 ]% M: atesticular volume was prepubertal at 2 mL each.: f% q7 [4 V7 }% O: R& ~
The skin was moist and smooth and somewhat2 s/ V# ~% o5 o; M. s* P5 f2 o5 n
oily. No axillary hair was noted. There were no! E' @. h7 p( d1 {3 \
abnormal skin pigmentations or café-au-lait spots.
$ k6 F- i$ X% S5 {: ]/ c% zNeurologic evaluation showed deep tendon reflex 2+
* J* @+ @4 ~: f3 S- B9 Q' @bilateral and symmetrical. There was no suggestion# B5 z( A# Y/ L; I
of papilledema.& B( F" Q" ?' P4 }. _
Laboratory Evaluation+ H- _6 |4 H$ I& h
The bone age was consistent with 28 months by
) } C, a% N( t1 m; d6 i9 rusing the standard of Greulich and Pyle at a chrono-; a+ l1 I t( }/ f6 o
logic age of 16 months (advanced).5 Chromosomal7 d& O6 m$ N4 V/ e. ^$ N
karyotype was 46XY. The thyroid function test0 X$ v" j; X2 W p3 ~; t9 c7 r0 L# ~
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
. c5 l" ?- T. s* q6 T8 d3 @lating hormone level was 1.3 µIU/mL (both normal)." j# f# {% M7 g/ J/ ]
The concentrations of serum electrolytes, blood
4 c0 r, }' D' xurea nitrogen, creatinine, and calcium all were
, e8 M! A" o6 }$ U3 E; {within normal range for his age. The concentration
+ E7 Y6 R" j, V8 l, W8 @$ \8 jof serum 17-hydroxyprogesterone was 16 ng/dL
2 l$ g' O1 S. u6 G(normal, 3 to 90 ng/dL), androstenedione was 20* T* @% K% c/ O3 z+ E/ n# h& u
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
( n% u5 G. `: k: ]1 Vterone was 38 ng/dL (normal, 50 to 760 ng/dL),
$ h2 }! u+ F/ m$ g8 A4 kdesoxycorticosterone was 4.3 ng/dL (normal, 7 to# m3 D8 ?0 ^- K4 s, C$ o" g) k' V* a
49ng/dL), 11-desoxycortisol (specific compound S); W/ {: f- L; Y4 O0 x* K
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
! W; e1 v2 e0 O5 ^/ f" k. L: ?tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total- k0 @& r/ s# ?. R/ I2 E
testosterone was 60 ng/dL (normal <3 to 10 ng/dL), P3 Q) S& e i* q2 A( C( X+ t
and β-human chorionic gonadotropin was less than# J! h- m; Q$ B& [' T+ g; u( B
5 mIU/mL (normal <5 mIU/mL). Serum follicular
$ q6 t! ]5 ~5 u9 Q# }stimulating hormone and leuteinizing hormone
9 i% k; W; a$ O) {0 E' P, z/ L1 oconcentrations were less than 0.05 mIU/mL
' R6 k3 i" q7 x7 U" R(prepubertal).
7 c" n* Z9 I; i% e* P, |" I: LThe parents were notified about the laboratory/ `6 H6 g I, R) q
results and were informed that all of the tests were8 g! K4 o6 E8 t0 i
normal except the testosterone level was high. The0 c6 l6 X; _3 m) q
follow-up visit was arranged within a few weeks to" h* d- N. R2 u4 n# F. x+ l" q
obtain testicular and abdominal sonograms; how-
8 P, N8 S, [4 n% cever, the family did not return for 4 months.' g! i; I$ n: c) \: r0 ^
Physical examination at this time revealed that the
2 s* ^& D& z- kchild had grown 2.5 cm in 4 months and had gained
& A* g3 {4 w' o0 k, Y2 kg of weight. Physical examination remained* B; Z% I; m& }/ r- M$ o$ @2 C
unchanged. Surprisingly, the pubic hair almost com-2 X1 l' l" d: r$ C% t
pletely disappeared except for a few vellous hairs at
- n- w* N4 ]& k' T. y* ~; V; c( {the base of the phallus. Testicular volume was still 21 m3 E2 x, W: z" t
mL, and the size of the penis remained unchanged., L' @( n* o% _" O6 I: p
The mother also said that the boy was no longer hav-
2 j' F' V2 ]" h; m) {, ving frequent erections.. J8 |0 ]! V# z9 t- t, I ~
Both parents were again questioned about use of) C1 n2 p- _) T+ W- |# }
any ointment/creams that they may have applied to
$ c' s* P, p% |' n: ?* F# A7 dthe child’s skin. This time the father admitted the
+ S# d) a3 ~) PTopical Testosterone Exposure / Bhowmick et al 5414 Z( y( [; W3 j9 U5 E4 T' M
use of testosterone gel twice daily that he was apply-
+ M: v8 v( [9 y3 b+ y* O) m5 Qing over his own shoulders, chest, and back area for6 q `9 l- G( \0 ^. }# i
a year. The father also revealed he was embarrassed' K a1 l! c! r' E! Z( O2 d
to disclose that he was using a testosterone gel pre-
* O/ E$ f, T6 [# T) U/ s0 rscribed by his family physician for decreased libido% A) @2 g6 w: I( M
secondary to depression.! q* t' s5 U2 j3 C1 f, I6 ]/ \0 s
The child slept in the same bed with parents.
- _0 K1 Z& |7 q1 M$ NThe father would hug the baby and hold him on his2 U! ?) f3 z4 n3 K& K A
chest for a considerable period of time, causing sig-
" @. O) @; N; X% knificant bare skin contact between baby and father.
4 z9 Q) @( e9 z- zThe father also admitted that after the phone call,
K3 H" E9 M1 ?# u5 E( V$ \. `when he learned the testosterone level in the baby
. i6 e% j$ w' G* Mwas high, he then read the product information
6 {% a8 ?1 e2 N0 tpacket and concluded that it was most likely the rea-% i7 s7 J& l; x6 e: U4 f
son for the child’s virilization. At that time, they
( r% r+ g& D" r& t" Vdecided to put the baby in a separate bed, and the; f$ y! a( ~, l! n. y" r
father was not hugging him with bare skin and had
5 \* E7 h" K6 A7 W( c! o7 b/ u) c3 z* R7 wbeen using protective clothing. A repeat testosterone3 X. o/ n, H: O) h
test was ordered, but the family did not go to the
' |* f1 j( M: S- G, m* Qlaboratory to obtain the test.% ?( [4 p7 x2 P& G, u* |
Discussion* }! |) a$ X; [. @ Y0 F
Precocious puberty in boys is defined as secondary
3 r) L( q5 v: asexual development before 9 years of age.1,4
3 ^/ O+ l- F+ M1 g( f; h4 K3 m$ FPrecocious puberty is termed as central (true) when
% {$ {" q3 |; ~" m% E& x8 Ait is caused by the premature activation of hypo-: n% V! i. s2 ^9 j0 l4 @
thalamic pituitary gonadal axis. CPP is more com-
" ~, v3 M& T! U& j" P/ Umon in girls than in boys.1,3 Most boys with CPP
4 c) x9 w- j& P2 D+ b# Nmay have a central nervous system lesion that is
6 T7 R" k! e: \responsible for the early activation of the hypothal-
7 t7 q6 n% F' U; Samic pituitary gonadal axis.1-3 Thus, greater empha-" Y5 T6 b: A3 f& J- b% O
sis has been given to neuroradiologic imaging in
+ ]3 c+ n4 {! Kboys with precocious puberty. In addition to viril-
/ O5 O" s( n( Zization, the clinical hallmark of CPP is the symmet-& ]2 \7 p2 X9 R# g3 ]
rical testicular growth secondary to stimulation by
) F3 d$ n2 _- N( O1 Ogonadotropins.1,3
g, O7 n9 Q/ @3 L8 u3 _: i; lGonadotropin-independent peripheral preco-8 g: S% D& _! H3 u( J
cious puberty in boys also results from inappropriate P j, L3 a B4 v! f% o3 ]
androgenic stimulation from either endogenous or1 }; J+ z9 [, @! W& _& D) s. t" r- a
exogenous sources, nonpituitary gonadotropin stim-1 O! J, a) \% y* r& N$ E, r
ulation, and rare activating mutations.3 Virilizing
8 [+ v% w7 }) _/ L( rcongenital adrenal hyperplasia producing excessive- M# {. x4 e$ s4 w. g
adrenal androgens is a common cause of precocious
9 w' C* p) {$ l0 L, \3 K9 N lpuberty in boys.3,4
! Z% D+ Y! H( B7 P4 F- y4 H* ^, sThe most common form of congenital adrenal
5 s5 x% j; T$ Xhyperplasia is the 21-hydroxylase enzyme deficiency.
! Y, \! p7 P" ~% L$ ?) H& CThe 11-β hydroxylase deficiency may also result in
) Y* @+ H% j X' \9 e3 y3 Fexcessive adrenal androgen production, and rarely,1 ]9 U/ I5 C. j' o! D3 b) m" ~
an adrenal tumor may also cause adrenal androgen8 _( X3 ~8 }5 e. S0 b
excess.1,3# I5 T5 Y2 [1 t2 d0 ]
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' o1 l" b% s: H) k8 n3 H8 v" c; u! q542 Clinical Pediatrics / Vol. 46, No. 6, July 2007 @# ?, i# q7 Z( Y& b/ i' `
A unique entity of male-limited gonadotropin-- H' ] A3 A+ V) A
independent precocious puberty, which is also known
" c: Z' p# I2 C, N1 {+ S( Nas testotoxicosis, may cause precocious puberty at a4 X5 Q0 w& A5 B8 ^3 F
very young age. The physical findings in these boys$ f( e1 |; y2 M# `+ O% q9 D
with this disorder are full pubertal development,
# m$ V- W) I8 `3 ?3 L. Cincluding bilateral testicular growth, similar to boys5 ]( S2 n6 i* H1 o8 w
with CPP. The gonadotropin levels in this disorder; |; q9 Z! H1 D# k: w
are suppressed to prepubertal levels and do not show
1 j* w1 U0 c7 epubertal response of gonadotropin after gonadotropin-. R$ v: f& d8 r2 S9 O4 v. _1 D& G' p
releasing hormone stimulation. This is a sex-linked
5 S- d7 W T1 a* J2 I, j6 E4 G8 Uautosomal dominant disorder that affects only5 t$ x* G' Q% h$ M
males; therefore, other male members of the family
* P0 W* h I: Xmay have similar precocious puberty.3+ Y5 G! c5 u1 u5 I( m; E
In our patient, physical examination was incon-6 U$ s5 V$ `: y9 x0 ^% T
sistent with true precocious puberty since his testi-3 ?* Z! o7 v l
cles were prepubertal in size. However, testotoxicosis
8 q2 i) }3 H+ p) Z2 c5 Xwas in the differential diagnosis because his father" e/ P9 P! b( c. }7 p3 m' \
started puberty somewhat early, and occasionally," p6 ^3 ~* R1 q8 k& D- }
testicular enlargement is not that evident in the7 ]" [9 q" b# Y: l9 s- U2 ~# n0 x
beginning of this process.1 In the absence of a neg-7 U9 t7 c: I0 p) U& h. Y' X
ative initial history of androgen exposure, our
7 J' s: m: |0 g9 B/ m. z1 Qbiggest concern was virilizing adrenal hyperplasia,2 e |7 R2 ?. }: K9 u, d) l' i: _% {
either 21-hydroxylase deficiency or 11-β hydroxylase
1 W# I. u% W5 Adeficiency. Those diagnoses were excluded by find-/ T i1 n' M% P- R) H% ]
ing the normal level of adrenal steroids.5 k# B8 ]6 d, u# Q! S
The diagnosis of exogenous androgens was strongly
7 @ K! J, y- g4 U; Vsuspected in a follow-up visit after 4 months because$ H( {8 q6 o$ g. } C3 C6 l
the physical examination revealed the complete disap-) ^; d B4 P& K6 P0 y& `. L4 H3 D
pearance of pubic hair, normal growth velocity, and- V6 y# u) ?% v9 m+ \ K3 d
decreased erections. The father admitted using a testos-
/ i% _8 E7 {8 U$ O, \1 `, \, [terone gel, which he concealed at first visit. He was7 M: c" O9 y+ R* ]/ ^/ m
using it rather frequently, twice a day. The Physicians’. y% x. C( I$ q7 P
Desk Reference, or package insert of this product, gel or
9 j, ]. `! Y' [8 V7 f7 Pcream, cautions about dermal testosterone transfer to9 N4 r( Q0 a5 ~) R
unprotected females through direct skin exposure.
2 |7 a) k1 b s) u" D- G2 m$ MSerum testosterone level was found to be 2 times the" S% S7 s. b5 R# S
baseline value in those females who were exposed to
, _6 h2 v) h$ [+ q1 Zeven 15 minutes of direct skin contact with their male
9 C3 K: H7 u% i; k- I! ypartners.6 However, when a shirt covered the applica-
3 u- P! R2 A% g9 r0 Etion site, this testosterone transfer was prevented.
$ D( T& |$ f: zOur patient’s testosterone level was 60 ng/mL,
' q% i" {4 y6 l3 h( Q- c, I$ dwhich was clearly high. Some studies suggest that
$ o5 A0 q0 t- h1 _dermal conversion of testosterone to dihydrotestos-+ V, P2 i% _" S7 N' A
terone, which is a more potent metabolite, is more
" {; ?& J$ V# pactive in young children exposed to testosterone
8 j! F, I+ F; a# Iexogenously7; however, we did not measure a dihy-0 B2 |! g* o( w, V6 }1 V' a
drotestosterone level in our patient. In addition to
% ]* k/ d) [; z M, C$ |3 Ovirilization, exposure to exogenous testosterone in
$ P" Q- ?2 M. f# Z8 @$ Wchildren results in an increase in growth velocity and
% L d) y, S' {; z7 k0 wadvanced bone age, as seen in our patient.* i5 w: L, }2 f$ t7 N' s( F& j- K
The long-term effect of androgen exposure during/ ?$ a, ~# s7 V
early childhood on pubertal development and final
# C2 g0 [: H$ A$ t. xadult height are not fully known and always remain
9 ~: k( N2 F8 O7 xa concern. Children treated with short-term testos-
7 z$ @) @* P: ]: s9 P! Iterone injection or topical androgen may exhibit some
1 t. A5 p4 m( C+ F) [" P1 sacceleration of the skeletal maturation; however, after2 V2 |0 z/ g; j, }8 }8 \: L" A
cessation of treatment, the rate of bone maturation P; q4 ?- |( P$ t
decelerates and gradually returns to normal.8,9
5 Z7 M v3 D# O1 GThere are conflicting reports and controversy' Z& J+ \' r# a2 G6 N( o. t
over the effect of early androgen exposure on adult
5 E4 A; H- N5 o! Ipenile length.10,11 Some reports suggest subnormal% U6 c/ W1 `9 |7 L* q/ Z! o
adult penile length, apparently because of downreg-* _4 M$ m2 _1 r" }: Z9 i
ulation of androgen receptor number.10,12 However,
: i6 |+ v$ F! g9 KSutherland et al13 did not find a correlation between
4 E. \! G" [' Z9 }# Q3 s# X' Cchildhood testosterone exposure and reduced adult
) t; Y9 m, k/ D) wpenile length in clinical studies.; q7 H6 [$ S: a) U% o' [' u& Q
Nonetheless, we do not believe our patient is( T9 c: l$ t7 Q* }& U( Z: D
going to experience any of the untoward effects from
% T% j+ m( _! N5 d' L1 ^testosterone exposure as mentioned earlier because" W, Z0 i1 S% }
the exposure was not for a prolonged period of time.. ^+ s9 W% b$ E2 j6 J
Although the bone age was advanced at the time of
4 x" c* ]% E u- _) Vdiagnosis, the child had a normal growth velocity at) L- X; E: I$ m b5 s* C9 w
the follow-up visit. It is hoped that his final adult- b4 l- Z, @; _( S! W, |
height will not be affected.$ l% W+ J+ N1 O5 }0 G( @
Although rarely reported, the widespread avail-0 ^9 t6 v3 |8 B4 n
ability of androgen products in our society may
% I7 V* E. ^: p& M; |indeed cause more virilization in male or female
7 y i* f* h; O \children than one would realize. Exposure to andro-
, N* v c2 |0 v% vgen products must be considered and specific ques-
& f& H% f. I. S; ]) Xtioning about the use of a testosterone product or
: T6 W+ W" r: }+ |: D3 N0 l0 t3 Egel should be asked of the family members during
6 V. @/ @2 E; Sthe evaluation of any children who present with vir-6 s& S; I% z2 U2 R) S
ilization or peripheral precocious puberty. The diag-
8 I( h, B) j# y0 Znosis can be established by just a few tests and by
5 N9 Z+ f. x5 i3 d, I' ? E, pappropriate history. The inability to obtain such a
/ B. ~! X& g" P r. Whistory, or failure to ask the specific questions, may
5 L, ^0 U' H( c' Vresult in extensive, unnecessary, and expensive
% A8 {2 |4 V* }# M; a5 s8 K2 winvestigation. The primary care physician should be7 U" J( j8 p* _( f
aware of this fact, because most of these children
& r2 d* n* a) P* u6 b! x6 Lmay initially present in their practice. The Physicians’+ @; c. [% ]2 _3 G& U& O! N
Desk Reference and package insert should also put a
8 H1 N+ C3 F" \, r2 S5 Dwarning about the virilizing effect on a male or
# H& t4 _: R& |6 c3 Zfemale child who might come in contact with some-7 b8 o! k" ~: Y* H6 ?; n
one using any of these products.
1 ^# t, R' O# M' _$ K. C+ b, ?References' I4 K3 I3 s6 l- G$ R2 q+ J* P
1. Styne DM. The testes: disorder of sexual differentiation- f$ z, `) @" \9 Z3 C7 |
and puberty in the male. In: Sperling MA, ed. Pediatric
/ \( k1 g8 B( g# r4 b1 ZEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
& z$ E, V5 `/ |* T2002: 565-628.
4 k6 N5 `3 l9 M4 t1 E; U2 S2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
6 ?9 B j1 q. T- N# `puberty in children with tumours of the suprasellar pineal
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! O! c$ {9 X, qareas: organic central precocious puberty. Acta Paediatr.
( b1 c7 K$ a1 q. ?/ c2001;90:751-756.
. g8 P" e. u1 D6 E3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
6 V& `6 a v. [9 F$ bPediatric Endocrinology. 4th ed. New York, NY: Marcel
" T' |; k( L. u [Dekker Inc; 2003:211-238.
+ ^3 ~7 X% o+ _4 P) ?0 ~3 R4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual+ N0 R1 I& D- e1 o) G' C% s9 N; R
development in a two-year-old boy induced by topical9 v3 M7 W+ }0 e
exposure to testosterone. Pediatrics. 1999;104:e23.0 W: l f+ W6 o* V+ \8 j
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of- f' C; x9 X* d2 }) X, |( b% ~8 h
Skeletal Development of the Hand and Wrist. 2nd ed.$ F4 q) r0 J$ G. l
Stanford, CA: Stanford University Press; 1959.
2 n1 d9 [" G1 B$ O6. Physicians’ Desk Reference. Androgel 1% testosterone,
7 w$ [% }$ \9 T1 W8 m( zUnimed Pharmaceutical Inc. Montvale, NJ: Medical8 C$ ?$ p* a. I/ U5 P$ X3 h
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