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is a significant concern for physicians. Central
" T( G/ m6 a4 wprecocious puberty (CPP), which is mediated8 c; q1 A. p1 G5 x# |8 x
through the hypothalamic pituitary gonadal axis, has% U5 e0 C {. p/ U' o' I
a higher incidence of organic central nervous system$ }) m% N4 k# q3 F, B
lesions in boys.1,2 Virilization in boys, as manifested$ [+ ?( @3 P7 p9 W
by enlargement of the penis, development of pubic
* Z( s9 M* r- q/ Z9 s1 {3 ^0 f& [hair, and facial acne without enlargement of testi-
2 c" X( J$ ~) W" d$ fcles, suggests peripheral or pseudopuberty.1-3 We) p+ n1 l+ n; q( ?
report a 16-month-old boy who presented with the3 R* j: z6 ?! [0 s
enlargement of the phallus and pubic hair develop-. {' ]" O i$ Z& Q: h' ~
ment without testicular enlargement, which was due: F4 q3 J8 C6 ~% U) J" T% f
to the unintentional exposure to androgen gel used by6 r7 Z9 |% k) K* X
the father. The family initially concealed this infor-
2 Y ^0 P0 j- a/ | h: e% Umation, resulting in an extensive work-up for this$ r" B- S8 ?! L2 X
child. Given the widespread and easy availability of
4 l+ J8 Y. k+ Otestosterone gel and cream, we believe this is proba-
4 d# v, [ K8 {* ]bly more common than the rare case report in the
/ y$ E7 ^& p3 n! s& }# jliterature.4
) k% ?$ k) ~3 X( K5 e# Z' [9 GPatient Report# Z( d8 a9 W* n6 ~3 T
A 16-month-old white child was referred to the
# P7 v! t X+ { P; f3 A4 x, `endocrine clinic by his pediatrician with the concern _* e( P5 F9 t
of early sexual development. His mother noticed
1 T- d9 U# H$ ` A, Y( Y! blight colored pubic hair development when he was1 h/ ~+ @9 f0 k" P
From the 1Division of Pediatric Endocrinology, 2University of
- w9 q; r s7 Q0 `South Alabama Medical Center, Mobile, Alabama.
& p- n1 t& t, q' NAddress correspondence to: Samar K. Bhowmick, MD, FACE,% D k9 D& l4 f, F
Professor of Pediatrics, University of South Alabama, College of. X6 t# C; p: c/ v
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;, w3 o& V( s4 m, h' M1 e
e-mail: [email protected].9 V; ]- B) G* }' R& p9 o( j
about 6 to 7 months old, which progressively became& ~! w+ c, ?9 ]( C8 V
darker. She was also concerned about the enlarge-2 c5 L& h6 J& }9 S# Q, A
ment of his penis and frequent erections. The child+ l% ^/ r! _1 y
was the product of a full-term normal delivery, with# U# X( |, j0 q5 g1 Y
a birth weight of 7 lb 14 oz, and birth length of
7 q4 ^1 ^ b7 }; l4 |2 f20 inches. He was breast-fed throughout the first year
0 q' ?( { e m) _3 ^% F2 k$ rof life and was still receiving breast milk along with
+ A* J& g2 e7 X$ t6 V1 F, ]" {solid food. He had no hospitalizations or surgery,& x2 [% Z! a7 I t- \
and his psychosocial and psychomotor development
8 I7 ]. w8 W4 j9 k, N0 Vwas age appropriate., I9 k4 b2 |$ X' ], j1 L( Q! \
The family history was remarkable for the father,1 o3 V' V6 |) l' {# H
who was diagnosed with hypothyroidism at age 16,) D) d7 ?: L0 G2 m' Y
which was treated with thyroxine. The father’s1 }3 u3 H& G0 }* O' s* N+ H
height was 6 feet, and he went through a somewhat) l& Y1 W* P) e3 R" b
early puberty and had stopped growing by age 14.5 A9 m* F7 f9 X7 c+ n1 Y# f' N: G, \
The father denied taking any other medication. The: Y3 W2 j W' ~5 Z
child’s mother was in good health. Her menarche
/ g# Z& D* _9 K( g4 Y& pwas at 11 years of age, and her height was at 5 feet
. m5 U9 z( d: B* P# l5 inches. There was no other family history of pre-
$ v h/ Z6 x8 j( O+ D, Ncocious sexual development in the first-degree rela-
( ]0 C# b: B8 htives. There were no siblings.
6 o9 s! [& s% D8 f+ P$ F v/ ZPhysical Examination
* t7 N8 W: k3 G* ]% B x/ W# [The physical examination revealed a very active,
+ A; T+ ~1 S# T6 eplayful, and healthy boy. The vital signs documented
6 e( B5 Q }2 U; O& oa blood pressure of 85/50 mm Hg, his length was
7 N' M7 f8 k. h, h. _90 cm (>97th percentile), and his weight was 14.4 kg
% S" j; B* w4 @' m& b- h(also >97th percentile). The observed yearly growth! J! o. V, ]# z' A
velocity was 30 cm (12 inches). The examination of- |6 c* |" G; D, y7 t) [6 t2 H! s( @
the neck revealed no thyroid enlargement.2 x; G4 {# L" o. x% b& P$ \% d
The genitourinary examination was remarkable for; V' I* |' n* K8 | M: m
enlargement of the penis, with a stretched length of. Y, x/ z0 }, W/ h* l
8 cm and a width of 2 cm. The glans penis was very well9 V4 V( ?5 s/ d
developed. The pubic hair was Tanner II, mostly around6 X5 O( W: u; z' J# }' y
5400 n, ^0 C) s6 A% C2 k: D, s2 m
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, P- p* F; D4 D* l) f& @the base of the phallus and was dark and curled. The+ _5 c% ?7 S; ]2 j4 D6 `
testicular volume was prepubertal at 2 mL each.5 ^$ U3 H) n' h* C; w/ l
The skin was moist and smooth and somewhat
2 F, ~( i; ]2 z/ a Coily. No axillary hair was noted. There were no
3 @5 ~' Z& U* t g. g& ^6 eabnormal skin pigmentations or café-au-lait spots.7 ?. @2 Q, J! s- I& a7 e( p
Neurologic evaluation showed deep tendon reflex 2+
8 \4 |1 d( e( N1 [# a& C& Q$ Qbilateral and symmetrical. There was no suggestion2 p' v) e" ^8 f2 `( r
of papilledema.
$ p# X4 _' u' Y3 ]6 ]5 U' r) ELaboratory Evaluation8 t& Z9 U6 Y' O! M
The bone age was consistent with 28 months by
# k7 s9 f- z6 X1 N* cusing the standard of Greulich and Pyle at a chrono-
/ p) K2 y+ X' U3 ^" b# rlogic age of 16 months (advanced).5 Chromosomal
9 q P, h, @' r. D4 ~( xkaryotype was 46XY. The thyroid function test
& [5 C. A7 O7 ^% w3 g# S, c, O" T$ nshowed a free T4 of 1.69 ng/dL, and thyroid stimu-: V/ }6 F1 m; P7 g2 I: q
lating hormone level was 1.3 µIU/mL (both normal).* Z7 y) [$ K+ N( t$ L
The concentrations of serum electrolytes, blood0 K! i! e3 s# Z& ] p
urea nitrogen, creatinine, and calcium all were
) l* w% h r N$ x5 c) Ewithin normal range for his age. The concentration
8 X1 k K% s9 ?# t6 xof serum 17-hydroxyprogesterone was 16 ng/dL* p$ b/ f+ Y0 J4 K6 N
(normal, 3 to 90 ng/dL), androstenedione was 20
# G. m* j1 ^. e% [" z; Q/ yng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
o' }7 l* A9 Z5 H3 Iterone was 38 ng/dL (normal, 50 to 760 ng/dL),
0 u: {# H# `) q+ z5 Z, x+ ^& l, Y% hdesoxycorticosterone was 4.3 ng/dL (normal, 7 to7 n: |2 S) V& S/ Y
49ng/dL), 11-desoxycortisol (specific compound S)& Y5 Z( A0 t/ Q4 y1 j* U
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
2 E8 L7 i1 Y- L2 Ntisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total5 p- M5 X5 G6 H% |3 `7 B2 A4 S5 v
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
- O1 c( v! R% _2 j* U" U/ v! F; Pand β-human chorionic gonadotropin was less than/ x: I: } \) Z8 h0 O0 Q
5 mIU/mL (normal <5 mIU/mL). Serum follicular
+ A# `) @3 P/ J% c# K' a$ Xstimulating hormone and leuteinizing hormone3 W; ^5 N5 v9 s0 S5 N5 P
concentrations were less than 0.05 mIU/mL
6 h6 A+ t4 T: {* p(prepubertal).
+ C# A+ A7 R0 R2 `. L4 {" gThe parents were notified about the laboratory
) t7 R% U+ `5 X% ]/ tresults and were informed that all of the tests were2 l# w' ^( ]. m4 b
normal except the testosterone level was high. The
* v% T( s8 T- g O4 z6 efollow-up visit was arranged within a few weeks to3 W8 p! h/ w1 C* ^! D4 A
obtain testicular and abdominal sonograms; how-
2 d4 m/ X' Y: c5 ?% y$ c) fever, the family did not return for 4 months.' a$ a- r/ V6 U& |" u
Physical examination at this time revealed that the6 J8 X3 w# V3 k. K
child had grown 2.5 cm in 4 months and had gained
* i; X* p$ m3 f' T. h8 p5 `2 kg of weight. Physical examination remained) W; V' I$ s9 g5 @1 B
unchanged. Surprisingly, the pubic hair almost com-
8 ~* R7 E6 a6 D/ t9 z4 ?, F, Q; apletely disappeared except for a few vellous hairs at
; i# L. x8 B+ Zthe base of the phallus. Testicular volume was still 2
2 D: u4 V1 C6 L8 n7 N% \& NmL, and the size of the penis remained unchanged.
! ~* K1 n' `9 \The mother also said that the boy was no longer hav- X; b5 ?( X0 p; I& A1 Y9 s
ing frequent erections.3 q5 y& n8 O; p$ I
Both parents were again questioned about use of! d2 @; L0 Z: Y- O- _ F! c1 \
any ointment/creams that they may have applied to
6 H! E7 v- a2 _- |9 Bthe child’s skin. This time the father admitted the- @ b7 _+ p8 P# p( p/ S
Topical Testosterone Exposure / Bhowmick et al 541
/ P6 I9 r. V# m7 wuse of testosterone gel twice daily that he was apply-9 F$ W7 v ~' K3 ^( u2 o
ing over his own shoulders, chest, and back area for2 @3 G n9 } G! t
a year. The father also revealed he was embarrassed
, i; [6 V" n% ~9 {1 L4 J6 ]to disclose that he was using a testosterone gel pre-
* R/ O1 [; p3 x" ]- X! b- ]scribed by his family physician for decreased libido
6 G' G* N: Z9 k. Y6 L( Bsecondary to depression.; y1 S+ `+ m& U1 g: j1 y; |
The child slept in the same bed with parents.- \& d0 [, o9 l, \8 k( ?5 a! p
The father would hug the baby and hold him on his
$ _# z& S T3 m0 V. r* K: ~0 q5 dchest for a considerable period of time, causing sig-
& U3 _! |6 \. m; O+ g- `nificant bare skin contact between baby and father.
& y }) j# Y- ?4 mThe father also admitted that after the phone call,
' E: P% K2 f4 [when he learned the testosterone level in the baby
" U6 a4 ^( H) H. `; @ Pwas high, he then read the product information7 m7 j4 U) b5 d# ]8 ?( T
packet and concluded that it was most likely the rea-
9 C4 J% F- ^+ V {6 C# W3 {0 d6 s4 ~4 json for the child’s virilization. At that time, they9 D; V! W: n- B& g: v) g9 y
decided to put the baby in a separate bed, and the
; F; i0 {* R+ Z/ H: K! }& b6 wfather was not hugging him with bare skin and had
9 ]9 v$ T f" C2 B: b5 Z/ Xbeen using protective clothing. A repeat testosterone) \. L, f! h) j- @
test was ordered, but the family did not go to the
9 s; K$ v* R3 n3 \laboratory to obtain the test./ j2 B( Z! n& c& ~: h: y
Discussion
. @3 \" ]: Q, h( ~6 V, z# JPrecocious puberty in boys is defined as secondary
8 S% ^* [/ o) Tsexual development before 9 years of age.1,4+ ~ A% Q5 L6 P D7 s* F4 J( N
Precocious puberty is termed as central (true) when
9 J1 \4 d0 r1 N" x$ v7 rit is caused by the premature activation of hypo-
2 [* |% K4 i2 X7 ?. |% ethalamic pituitary gonadal axis. CPP is more com-0 `5 Q0 T. t: i% m& C1 \; f8 m
mon in girls than in boys.1,3 Most boys with CPP
( z d N; @( l7 vmay have a central nervous system lesion that is
9 L* p6 d0 d) C* Dresponsible for the early activation of the hypothal-- \" k: A# [% @6 r9 Y" V
amic pituitary gonadal axis.1-3 Thus, greater empha-
2 G% J& c; _& e3 Fsis has been given to neuroradiologic imaging in
, {$ m. z' ~$ d- l0 C7 J2 g" gboys with precocious puberty. In addition to viril-
# g4 W" B) t/ l# _ization, the clinical hallmark of CPP is the symmet-! T7 I; @$ @/ O
rical testicular growth secondary to stimulation by
% _7 }# t9 {4 n8 z: K9 |3 P6 egonadotropins.1,34 e2 v& ?! w) z6 i
Gonadotropin-independent peripheral preco-
0 x1 ~& n: T5 k# A& \5 R, i. d$ Ocious puberty in boys also results from inappropriate" X; e! ?2 \# f' [' y6 x
androgenic stimulation from either endogenous or% o- x( b4 w) n+ f' Q
exogenous sources, nonpituitary gonadotropin stim-8 D7 a: `9 G$ h, X! L' d3 h$ g4 i6 z
ulation, and rare activating mutations.3 Virilizing& b7 e0 M4 @) I1 A' p
congenital adrenal hyperplasia producing excessive
0 H4 \6 B) V0 vadrenal androgens is a common cause of precocious& w1 V$ P* m* {* J) j9 X
puberty in boys.3,40 h" B/ W8 ?3 `% q% D
The most common form of congenital adrenal/ B9 D( ^& \3 T0 {
hyperplasia is the 21-hydroxylase enzyme deficiency.+ L5 d' _& m+ D/ ]/ [2 d' Q
The 11-β hydroxylase deficiency may also result in4 J0 Y- c* H+ B# d$ i
excessive adrenal androgen production, and rarely,
1 S0 p7 E% E& fan adrenal tumor may also cause adrenal androgen8 d0 R3 k/ T6 `- K0 F$ k
excess.1,3
1 }- S4 L4 a( Q3 Qat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 u6 I8 T. `) A2 X( m
542 Clinical Pediatrics / Vol. 46, No. 6, July 20072 i9 e7 K+ k' X; J h
A unique entity of male-limited gonadotropin-7 n& `- m; n" z9 q" D4 e
independent precocious puberty, which is also known. ]) |3 G0 j1 \8 `4 H8 E, R
as testotoxicosis, may cause precocious puberty at a
0 {$ N. @6 u. d) Lvery young age. The physical findings in these boys
8 n# L* j& ?) zwith this disorder are full pubertal development,/ T4 O7 `" |/ F0 k2 ~' f: [
including bilateral testicular growth, similar to boys
4 _* L, _( V5 c; Twith CPP. The gonadotropin levels in this disorder* P* @' I/ ?( X3 Y
are suppressed to prepubertal levels and do not show
0 U" z/ S+ Y# upubertal response of gonadotropin after gonadotropin-
' w0 G! {1 [+ r0 x- a& \releasing hormone stimulation. This is a sex-linked# {4 ^/ f8 q3 }) A+ u
autosomal dominant disorder that affects only
; D* d2 k- s7 y3 a' amales; therefore, other male members of the family; z+ |. j9 Z# d& z/ S
may have similar precocious puberty.30 A- k2 a W( F" G% l$ v3 o+ a! R
In our patient, physical examination was incon-9 ]+ l4 k$ Q4 w, H6 U! Y" O
sistent with true precocious puberty since his testi-
, s0 p" p0 ]" J- F4 ]+ dcles were prepubertal in size. However, testotoxicosis
' P3 q8 J; r% A9 V& A/ Rwas in the differential diagnosis because his father
' ~! h: I9 `# d# T r# Astarted puberty somewhat early, and occasionally,- v3 \. G; S; b
testicular enlargement is not that evident in the
0 H5 A; U4 a! p* I ^0 N, G3 Sbeginning of this process.1 In the absence of a neg-
" z6 }; ]5 H6 d. w! J7 J: }ative initial history of androgen exposure, our
/ N4 m' ]3 ?, s7 E% abiggest concern was virilizing adrenal hyperplasia,$ i% t2 z( L9 O& T: o' c+ z5 z
either 21-hydroxylase deficiency or 11-β hydroxylase
: F: b% ~2 j! e# `9 Sdeficiency. Those diagnoses were excluded by find-
, _; [8 V7 j1 T2 [" N3 L5 B' {ing the normal level of adrenal steroids.
, f8 @0 g n0 o* G( F# sThe diagnosis of exogenous androgens was strongly9 `4 v- @$ E, J8 e3 b+ ]& Z. n
suspected in a follow-up visit after 4 months because% j3 C3 [! t* P! R9 H" C
the physical examination revealed the complete disap-. _# V6 R# ]- a3 V% c* b( r
pearance of pubic hair, normal growth velocity, and
! ? C$ P6 d! e$ r& y" H9 ]decreased erections. The father admitted using a testos-
+ o! T$ J4 |) V) ?/ V- i3 S3 \terone gel, which he concealed at first visit. He was
/ v/ n9 ^8 [9 m, \, ~8 Iusing it rather frequently, twice a day. The Physicians’
* v& _2 ^0 A m7 C6 z7 n+ VDesk Reference, or package insert of this product, gel or
+ q6 u$ {3 l" w6 Qcream, cautions about dermal testosterone transfer to. x4 A2 C# k4 s$ @: r. y
unprotected females through direct skin exposure., K. E) ~. U" e6 B- P
Serum testosterone level was found to be 2 times the& I, H+ a1 i4 U8 S/ b7 e
baseline value in those females who were exposed to+ Z5 y4 _2 B; c, {
even 15 minutes of direct skin contact with their male
: Q4 t C& |' }: M4 R' } r6 b7 kpartners.6 However, when a shirt covered the applica-
5 m) U4 X7 e8 a- E' C( D, Ztion site, this testosterone transfer was prevented.& W- m# F- a- {/ d# s( {
Our patient’s testosterone level was 60 ng/mL,
* l0 P/ {$ U5 O1 p9 c1 r0 J) Rwhich was clearly high. Some studies suggest that
8 o1 _$ l2 G- a; \# ^% R& }6 Jdermal conversion of testosterone to dihydrotestos-
; X/ I4 j; M6 q; x* m8 C) Sterone, which is a more potent metabolite, is more/ b/ {: w8 q t# Q# r* F
active in young children exposed to testosterone
3 o& m: x# O+ z, S8 Hexogenously7; however, we did not measure a dihy-+ v4 o( J7 m) z& Q$ K' g5 o
drotestosterone level in our patient. In addition to0 m) _) f7 S3 Y8 F8 o; q+ a3 [
virilization, exposure to exogenous testosterone in
$ g: f- I `* _5 [. kchildren results in an increase in growth velocity and
, R+ a/ @; N6 g8 J) o/ Uadvanced bone age, as seen in our patient.& m7 z7 u. q$ m# \, m, [& ]
The long-term effect of androgen exposure during
3 ^ h- P* v" \7 q/ cearly childhood on pubertal development and final
% _) N {9 X+ O1 madult height are not fully known and always remain
$ {! k1 j& J- `a concern. Children treated with short-term testos-$ C6 b R7 y. M+ Z* x
terone injection or topical androgen may exhibit some
" e0 H: F2 ?3 o' J" ]3 @acceleration of the skeletal maturation; however, after0 q+ v! l8 ^8 m' E6 G: d
cessation of treatment, the rate of bone maturation
/ p5 u* H9 A, `% Q0 w# ^7 x+ ldecelerates and gradually returns to normal.8,9# p. H; r( v* K+ c- H
There are conflicting reports and controversy
z" O+ h' Q) n/ [+ `, r: j3 oover the effect of early androgen exposure on adult
- F/ { f! F+ X1 Rpenile length.10,11 Some reports suggest subnormal
+ [# o* W3 ^9 b; H F) P0 Gadult penile length, apparently because of downreg- ^# R% z0 @7 b/ H# [5 O) h! K# k
ulation of androgen receptor number.10,12 However,
, N* s* C3 E; F- V, a7 ]; y3 rSutherland et al13 did not find a correlation between7 ]: k& X7 @* ]/ T
childhood testosterone exposure and reduced adult9 ?) H" u! Z5 G8 y/ f4 c
penile length in clinical studies.* b4 i+ E) |8 ~
Nonetheless, we do not believe our patient is
; @* e" i5 x3 I- h. i* U+ w* t8 Hgoing to experience any of the untoward effects from
; a, e! M4 s* Y5 I; D7 h0 n! g# L2 z' ~testosterone exposure as mentioned earlier because
; [( j2 s3 f& Y* Pthe exposure was not for a prolonged period of time.; S2 E( I% [9 U/ V3 n' s; S
Although the bone age was advanced at the time of# W" s j2 w$ K8 F/ B
diagnosis, the child had a normal growth velocity at1 B z" Q) u! H. h
the follow-up visit. It is hoped that his final adult7 W& R9 A! w. u( d( X! E" v
height will not be affected.
8 u9 G) o! L/ z. E( Y$ [Although rarely reported, the widespread avail-& V0 k6 g, C; G1 ]% {
ability of androgen products in our society may
5 |: [4 u+ V8 f) _indeed cause more virilization in male or female4 x5 U/ Q8 }$ c# h# Y1 K. C1 M3 K
children than one would realize. Exposure to andro-
3 V6 v, H7 ^1 S+ | L" Kgen products must be considered and specific ques-# V7 i6 L/ |8 c( A! i4 L! X
tioning about the use of a testosterone product or( H/ D3 B/ ~9 O3 P9 h4 v1 B; Q
gel should be asked of the family members during
1 m9 L9 `. m) P8 hthe evaluation of any children who present with vir-0 N0 z3 m$ O+ X* s
ilization or peripheral precocious puberty. The diag-5 ~2 {$ A0 e. \- S/ [3 i E
nosis can be established by just a few tests and by9 |4 _1 @( m) i9 k/ a
appropriate history. The inability to obtain such a
7 b( l& u: d. _* i( U* Lhistory, or failure to ask the specific questions, may3 h# `$ t* i3 g' }; o" t. ~3 u& M
result in extensive, unnecessary, and expensive" ?3 U. p9 P- Q1 p4 A0 } @
investigation. The primary care physician should be
o A; W9 P( c7 H7 b9 K; Taware of this fact, because most of these children3 o% F; Q6 s' N0 G
may initially present in their practice. The Physicians’3 m$ M- b1 r3 A/ f( R; F. n
Desk Reference and package insert should also put a4 O/ W# {$ e1 K0 ~. J( ^* j5 t0 S
warning about the virilizing effect on a male or0 H- `; R' R' Q: ~+ i& t% _1 u
female child who might come in contact with some-
8 U& Y! ^; d4 xone using any of these products.
8 W/ V, I' `: r" a8 o7 W4 a8 \7 _) UReferences
8 \+ V' n G$ ]. [1. Styne DM. The testes: disorder of sexual differentiation
. i) J* I6 O: ~% X, C; {% `% Jand puberty in the male. In: Sperling MA, ed. Pediatric# V0 Y2 e$ G' {0 ?! l# m
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
$ g4 F4 D0 p4 L; n4 d9 O2002: 565-628.
5 V7 S- S4 M& A( _# Z6 f9 K2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious( F( p% R& {- c3 E
puberty in children with tumours of the suprasellar pineal7 N7 g# { `- L0 d2 T
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2 q9 a: U( g& Q3 j/ _' Fareas: organic central precocious puberty. Acta Paediatr. W* o. X e8 ^$ j
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! d& X" i) q; ^% E" @. B, `9 \+ _8 n8 b3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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& z0 O' W6 J0 z3 w! Z) d$ u8 R: cDekker Inc; 2003:211-238.
( b5 E/ Y: Q$ j8 u5 O) s4 m4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
% ^& l7 m0 B5 D4 w% ?development in a two-year-old boy induced by topical% T( |6 g% W% z- B
exposure to testosterone. Pediatrics. 1999;104:e23.
6 w" l" m; h' _! ^. O' O* w5. Greulich WW, Pyle SI, eds. Radiographic Atlas of2 s- E+ K9 S& q* B3 v0 ?7 g, }
Skeletal Development of the Hand and Wrist. 2nd ed.. m, W, u6 N6 I7 J, M* w5 J
Stanford, CA: Stanford University Press; 1959. `9 I" Y7 w* F6 L2 L
6. Physicians’ Desk Reference. Androgel 1% testosterone,
+ S) v/ x. d; F' Z# s2 G1 kUnimed Pharmaceutical Inc. Montvale, NJ: Medical
! ~) X5 Q6 l" fEconomics Company, Inc; 2004:3239-3241.* E3 L+ p9 h' w) X& V( m: ~ W
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