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is a significant concern for physicians. Central$ \- Z+ [' T$ r8 l; r: v/ k
precocious puberty (CPP), which is mediated. ?* t$ k/ e1 M% g V" ?6 p+ R
through the hypothalamic pituitary gonadal axis, has, @) m0 ]: v( e8 h! ^
a higher incidence of organic central nervous system3 h+ x2 S2 Y6 d* r* {8 c4 e
lesions in boys.1,2 Virilization in boys, as manifested
3 X- q. d# m$ k0 R: T4 Y: iby enlargement of the penis, development of pubic
$ D! s9 v( {( dhair, and facial acne without enlargement of testi-* ^% \$ C& I1 l% f- A
cles, suggests peripheral or pseudopuberty.1-3 We
! L( x) g* X/ m5 O( Y) |+ f; Rreport a 16-month-old boy who presented with the: n' J5 R9 X( y. p4 j+ f
enlargement of the phallus and pubic hair develop-5 m1 Z6 p6 _5 z
ment without testicular enlargement, which was due
0 n \/ n- |# Q ~8 h. k2 {to the unintentional exposure to androgen gel used by) n6 V4 I( \9 u) A3 G
the father. The family initially concealed this infor-3 h- `) {- j& ~9 @4 d: {% _
mation, resulting in an extensive work-up for this4 L; z- c: R0 d% |4 f0 D' l+ d
child. Given the widespread and easy availability of
; H9 _" m4 w% C0 rtestosterone gel and cream, we believe this is proba-; U9 G& v9 N' S6 v8 Y8 Q
bly more common than the rare case report in the
7 X; S8 w" N- U0 T& Nliterature.4% q$ G4 v; N+ D {) n* v% B k
Patient Report. C; u# x2 `) Z$ ?' t% u9 o# B! G
A 16-month-old white child was referred to the
/ [7 x" w1 P7 [/ [endocrine clinic by his pediatrician with the concern; C W% Z$ j3 u$ @
of early sexual development. His mother noticed
9 V/ W* T. [+ o# Clight colored pubic hair development when he was$ `8 G6 g9 A- X9 Q# F4 V; ]
From the 1Division of Pediatric Endocrinology, 2University of# `& Z+ ^; Z8 O8 @ H
South Alabama Medical Center, Mobile, Alabama.
* d6 F. X& G+ ]0 H% {+ |( k- eAddress correspondence to: Samar K. Bhowmick, MD, FACE,
' k z; P7 U! k: e5 s% K3 QProfessor of Pediatrics, University of South Alabama, College of' n6 \$ I, V- l" O7 I
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;1 [) {% ?# O5 B1 G5 o, |3 a* P
e-mail: [email protected].
/ A& {. K/ f) I$ dabout 6 to 7 months old, which progressively became& s g2 L; O) j' [; W
darker. She was also concerned about the enlarge-& V+ [' L! z7 s( u N# F, d
ment of his penis and frequent erections. The child
5 b$ ~( W2 B" \) c4 Fwas the product of a full-term normal delivery, with- s6 M0 o8 q8 t4 A/ N* R
a birth weight of 7 lb 14 oz, and birth length of+ L: P9 b& ^; ^. W
20 inches. He was breast-fed throughout the first year
. J* g& J( e4 Bof life and was still receiving breast milk along with2 v% s9 I9 i. F/ S! l- g0 F; c
solid food. He had no hospitalizations or surgery,
: Q, A8 L( i4 M& f# r/ F. oand his psychosocial and psychomotor development6 }$ s9 M% }! K$ I& p1 ~, @2 ?8 {
was age appropriate.9 v5 v$ \$ A, w8 }- S
The family history was remarkable for the father,
* {/ w, k: E- \$ X. Owho was diagnosed with hypothyroidism at age 16,
5 a& X W5 Z8 [6 }7 b9 ~: T/ Bwhich was treated with thyroxine. The father’s
3 k2 o, ~/ k$ Z8 W+ Y% ^, mheight was 6 feet, and he went through a somewhat
/ e) C. ]% e0 W4 o1 _! w; Iearly puberty and had stopped growing by age 14.$ V6 U; ]! w% S) l
The father denied taking any other medication. The
; ^+ c& ^# J U: W# Q! ~ ?child’s mother was in good health. Her menarche
/ H- l2 Z5 p8 t j9 }4 Gwas at 11 years of age, and her height was at 5 feet
5 l" P/ H3 d7 W0 z w5 t- P5 inches. There was no other family history of pre-
4 P* U' k1 x5 V$ O4 X L4 Dcocious sexual development in the first-degree rela-
* n( ]" b# p+ {: V$ ^2 Otives. There were no siblings.4 V5 u$ G: B4 H( Q" @" |
Physical Examination2 B# z& y/ v) {( n, P
The physical examination revealed a very active,: X( q( @) W8 f; @
playful, and healthy boy. The vital signs documented& w( ]# m: w8 |+ i0 p
a blood pressure of 85/50 mm Hg, his length was
1 t* D; }; E4 }: ?7 }90 cm (>97th percentile), and his weight was 14.4 kg
. G- F# ^- v0 R9 C0 i(also >97th percentile). The observed yearly growth
8 b: \: h* Q1 g+ kvelocity was 30 cm (12 inches). The examination of
1 J3 s/ R s, k2 bthe neck revealed no thyroid enlargement.
8 d1 P* o. v/ V, y, ]The genitourinary examination was remarkable for5 g7 Z5 S6 _* S" |' k; _1 t8 t
enlargement of the penis, with a stretched length of' |( b: p+ B J1 |5 g0 p5 z
8 cm and a width of 2 cm. The glans penis was very well
" J& v' F& {1 S5 fdeveloped. The pubic hair was Tanner II, mostly around
5 \5 I' v" k2 H( n2 e% ?- B1 |540+ F# X! F, P3 k( q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, Y. |$ m l% z. C$ Q) g& K5 w+ ^! p
the base of the phallus and was dark and curled. The
% P7 @* m- _/ T. i8 `5 ^2 Ftesticular volume was prepubertal at 2 mL each.0 x7 [( Z# m( U4 |7 h& g- t
The skin was moist and smooth and somewhat
: X3 @: i: f& _: Q3 T( u9 m5 loily. No axillary hair was noted. There were no
7 T x) o: c6 [ d8 r; R9 I3 Cabnormal skin pigmentations or café-au-lait spots.
2 K9 b: k6 I! ?Neurologic evaluation showed deep tendon reflex 2+
9 `7 d* P1 f" h6 X4 Ibilateral and symmetrical. There was no suggestion t8 A2 y$ p1 s
of papilledema.
! }7 g4 \" k$ [6 L! B7 a4 uLaboratory Evaluation
3 a9 |; j0 k$ A8 s$ I: UThe bone age was consistent with 28 months by+ ]% A2 b# e& ?8 s6 r/ }. R: c3 t
using the standard of Greulich and Pyle at a chrono-
4 }; {9 H& @! v: q1 J& H7 ylogic age of 16 months (advanced).5 Chromosomal e( x6 H8 J; i* n: v* t7 |7 A# a
karyotype was 46XY. The thyroid function test
! I6 O% q3 R, U0 E4 dshowed a free T4 of 1.69 ng/dL, and thyroid stimu-6 k4 Q" M. N, C) F8 v# d) j$ S' q
lating hormone level was 1.3 µIU/mL (both normal).+ x3 Y# V" b# @9 G( Z7 q
The concentrations of serum electrolytes, blood
9 S% K5 h, M5 P+ m" k9 h. T6 ]urea nitrogen, creatinine, and calcium all were
' \0 s3 j% L+ Xwithin normal range for his age. The concentration
e* e+ B- p+ L' V! y! T. s( R4 ~( Mof serum 17-hydroxyprogesterone was 16 ng/dL! z+ `: h! @' ^. G+ a" Q+ T
(normal, 3 to 90 ng/dL), androstenedione was 20
8 W7 M! Y% a- h- w0 x+ b: @- M9 D" zng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
8 _9 ^% V/ F4 H, Aterone was 38 ng/dL (normal, 50 to 760 ng/dL),
: X1 R9 N* j% e- N5 W5 mdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
2 q% | ~! W! E0 g$ Q8 M49ng/dL), 11-desoxycortisol (specific compound S)
3 Y* P& |9 t0 i5 O+ _3 Ewas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
# s" g3 y7 g8 Etisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
" R6 I; u5 |# N L" Vtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
) P- s! _/ u: E! U. Rand β-human chorionic gonadotropin was less than6 @2 G0 n7 e9 U! T5 g+ U
5 mIU/mL (normal <5 mIU/mL). Serum follicular" T1 _% N% x* Q5 k' X) G
stimulating hormone and leuteinizing hormone
* X& f A* z& Nconcentrations were less than 0.05 mIU/mL7 d4 q+ [, W" K% v8 c y! S
(prepubertal).+ u3 _+ S, F- i+ m# o( C
The parents were notified about the laboratory2 T7 z* a/ J I
results and were informed that all of the tests were5 O# C3 _5 @, m7 c
normal except the testosterone level was high. The
. C0 F# M5 t; z. Zfollow-up visit was arranged within a few weeks to
/ B. A% ^: f- _3 p! pobtain testicular and abdominal sonograms; how-
U0 o. W9 h1 [ever, the family did not return for 4 months.
* M' r/ g R8 m9 T. e, VPhysical examination at this time revealed that the3 e$ j; O# ^5 i' ^& z- n: \9 H2 S" S
child had grown 2.5 cm in 4 months and had gained
9 S5 F+ r8 f0 P& A; m& H2 kg of weight. Physical examination remained; l1 {& L& F: \5 [3 ^% u) P1 ^
unchanged. Surprisingly, the pubic hair almost com-, a3 U0 N" q% L# j9 x
pletely disappeared except for a few vellous hairs at
! @( x3 t; V$ t+ P! q" Ithe base of the phallus. Testicular volume was still 23 s& f, [* E8 o8 j
mL, and the size of the penis remained unchanged.
, g9 _, @" b7 W4 }: wThe mother also said that the boy was no longer hav-
* W8 G0 v% q, L' i+ s. k& Ying frequent erections.& \+ I' h( p# B2 q& U
Both parents were again questioned about use of
; {+ W; ~5 d) Xany ointment/creams that they may have applied to
" K6 O1 v+ g5 b9 w6 P" n: `- b5 {the child’s skin. This time the father admitted the$ w. [5 M' b0 v t6 A2 s2 V
Topical Testosterone Exposure / Bhowmick et al 541
! {9 o% t5 g0 Y' k: \+ Cuse of testosterone gel twice daily that he was apply-' f9 P4 X6 y8 M5 r! h
ing over his own shoulders, chest, and back area for
4 B2 I, l; c' v" ~a year. The father also revealed he was embarrassed
- S3 S! G5 ~0 d; w- d, qto disclose that he was using a testosterone gel pre-
% X- |$ F9 s) o+ I! }5 zscribed by his family physician for decreased libido
- n( L3 _% V9 {* D; y; Zsecondary to depression.- {) K: ^% j3 z4 ]
The child slept in the same bed with parents.& Y/ {' f4 M- {* P* H
The father would hug the baby and hold him on his$ J& C3 T! W6 r8 Q
chest for a considerable period of time, causing sig- s, i! m: N- V% Q; m: }5 _
nificant bare skin contact between baby and father.. s3 q8 a' s7 z% Q7 Z! f
The father also admitted that after the phone call,
9 _8 e6 x L# u1 mwhen he learned the testosterone level in the baby0 [& I4 {' R% z0 _
was high, he then read the product information8 J6 r/ Q+ P& m
packet and concluded that it was most likely the rea-
" r+ I6 }5 g# s% ]. cson for the child’s virilization. At that time, they
: z0 }" z& B6 C/ ^; C' o* R- I. Edecided to put the baby in a separate bed, and the2 y% h5 I# j& z
father was not hugging him with bare skin and had/ U- F5 ]' ^2 L
been using protective clothing. A repeat testosterone
" e5 p6 V' T2 dtest was ordered, but the family did not go to the, p) y# j$ s! f3 L: \9 b& o
laboratory to obtain the test.' r) Z, j1 m' G
Discussion1 p: D E0 G, V, l5 |3 j
Precocious puberty in boys is defined as secondary
* b" B# Z( F- f0 H Dsexual development before 9 years of age.1,4
. Y% c! a1 A1 e/ ?Precocious puberty is termed as central (true) when. p. K3 F8 A! c
it is caused by the premature activation of hypo-+ H$ _* {6 f+ W! |0 C/ o$ n
thalamic pituitary gonadal axis. CPP is more com-
* ?4 o- S4 a0 p P8 _$ Q, omon in girls than in boys.1,3 Most boys with CPP
2 x9 E+ b$ ^$ R* T. S" B8 x( j, Mmay have a central nervous system lesion that is& f7 L: C/ z2 x. Q" L
responsible for the early activation of the hypothal-0 r! F/ ]9 _0 C3 {- m) z0 k
amic pituitary gonadal axis.1-3 Thus, greater empha-$ R( s5 [3 \8 I# o2 l: p4 Z4 v+ m( Y& }
sis has been given to neuroradiologic imaging in7 `8 ~" z1 f( y- P6 Z
boys with precocious puberty. In addition to viril-
* g0 Z& ~+ _ v t- @ization, the clinical hallmark of CPP is the symmet-
+ ^' a( }9 S" N) k* H2 e9 f2 vrical testicular growth secondary to stimulation by
; Z7 F d4 M; x! h/ _gonadotropins.1,3
5 t6 Z9 }, x" t v$ NGonadotropin-independent peripheral preco-
2 P; T+ f" n# N; ocious puberty in boys also results from inappropriate c7 S0 g r6 l: w
androgenic stimulation from either endogenous or7 D) U& m& g0 t5 a8 \3 J+ u
exogenous sources, nonpituitary gonadotropin stim-
4 j) T9 o0 K2 Zulation, and rare activating mutations.3 Virilizing
* V1 x4 M0 q7 A+ x# | k( ]; rcongenital adrenal hyperplasia producing excessive( ?' |7 {" S6 ^ S' C2 q
adrenal androgens is a common cause of precocious
6 V; ~- C: [, S: ]. E' ^6 Z6 Q/ Cpuberty in boys.3,47 i- w7 R$ ?$ G9 p7 O
The most common form of congenital adrenal
7 J9 `, V* k3 r. }) @2 Bhyperplasia is the 21-hydroxylase enzyme deficiency., \; p" f- q0 @4 ?' h1 x' {
The 11-β hydroxylase deficiency may also result in# k0 X/ a2 J+ E" P* C w1 @
excessive adrenal androgen production, and rarely,
: t; r7 ^3 Q* A: {. Q+ h0 N, M% R0 Pan adrenal tumor may also cause adrenal androgen" W4 E5 K* w" J( a6 V a/ u+ i
excess.1,3
& ~! O) F* `8 pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* i: ^7 _& I* z4 v- y: Q' Y( Z542 Clinical Pediatrics / Vol. 46, No. 6, July 2007 o4 f" e7 c. ~% X, ~8 g( L" h0 j
A unique entity of male-limited gonadotropin-$ ?" ^" W8 a+ H
independent precocious puberty, which is also known
& O( ]8 H# j* C& e8 O( N3 w" ras testotoxicosis, may cause precocious puberty at a" f+ I# X' I% T7 q
very young age. The physical findings in these boys
1 a3 R5 h% j* X; ]; Nwith this disorder are full pubertal development,
5 Z3 k2 E# A' E2 n. v0 v) K+ ]including bilateral testicular growth, similar to boys
. [: T# A8 P0 P& ?6 y: m7 wwith CPP. The gonadotropin levels in this disorder
" }% ?7 |, w8 ?/ l+ D5 o, Y$ z3 p! dare suppressed to prepubertal levels and do not show0 `% O: T7 X6 c7 F6 ^
pubertal response of gonadotropin after gonadotropin-
* w. v4 e" }4 T& treleasing hormone stimulation. This is a sex-linked
8 C1 P6 ^: R1 ]$ ]autosomal dominant disorder that affects only
+ \" z+ x! X1 tmales; therefore, other male members of the family1 C) L) {" u' `* r9 T& }
may have similar precocious puberty.32 x3 B0 ]* v0 _; f, Y- r6 O
In our patient, physical examination was incon-! r' i8 E% r3 N! l, `* `! n, x
sistent with true precocious puberty since his testi-
0 {# [- a1 l$ X( q* z& icles were prepubertal in size. However, testotoxicosis5 N% C& _! O, U. R3 Q
was in the differential diagnosis because his father) S3 o; O8 q. ]
started puberty somewhat early, and occasionally,0 g: A: d$ Y3 X7 e
testicular enlargement is not that evident in the
# c9 Y; R0 J7 m, tbeginning of this process.1 In the absence of a neg-
4 u; r% ] O0 C7 ]8 `% Mative initial history of androgen exposure, our
0 S) k3 _& S$ y" z* Z; o8 r! t+ Lbiggest concern was virilizing adrenal hyperplasia,0 `2 m" c, W) A
either 21-hydroxylase deficiency or 11-β hydroxylase8 Y; @' F% O8 Q y
deficiency. Those diagnoses were excluded by find-3 j0 A4 z( f* F1 I
ing the normal level of adrenal steroids.
* }7 o9 V1 M# N* F6 XThe diagnosis of exogenous androgens was strongly
' A( t" e) t" h8 q* Y& W; U+ V+ wsuspected in a follow-up visit after 4 months because
5 g+ u' s7 s3 @* E lthe physical examination revealed the complete disap-
( l/ ^( W. f R3 M6 \; g' Bpearance of pubic hair, normal growth velocity, and
) @3 Y$ Q- h& R! Q. cdecreased erections. The father admitted using a testos-
( {% X0 ?% A) r0 F) Z2 Y p) `terone gel, which he concealed at first visit. He was+ C1 S+ x) {% B r/ M7 w
using it rather frequently, twice a day. The Physicians’/ Q% x: n" F* n
Desk Reference, or package insert of this product, gel or8 G2 R% s/ x- Y/ s; E6 l% O
cream, cautions about dermal testosterone transfer to. n% r: Z. m8 m. D' V
unprotected females through direct skin exposure.
- a7 w6 i' v3 b0 k7 zSerum testosterone level was found to be 2 times the
4 x0 w2 s- x _; Dbaseline value in those females who were exposed to
: D( j% c! f+ D& K- T3 p" h( Q$ Aeven 15 minutes of direct skin contact with their male
I' A) G, f# o9 m2 k, X8 ~& zpartners.6 However, when a shirt covered the applica-
7 K, v! `% _; |3 v: ?tion site, this testosterone transfer was prevented.! O, [" V6 d9 a4 C4 G# A- R
Our patient’s testosterone level was 60 ng/mL,. _0 q3 Z+ \4 h4 O2 m
which was clearly high. Some studies suggest that
5 Z/ q3 R* E5 `) |' Mdermal conversion of testosterone to dihydrotestos-
! q9 g7 ]% B2 [. Hterone, which is a more potent metabolite, is more7 Y* u" H/ q* G: O3 `" i" Q- ~
active in young children exposed to testosterone
, }9 [- |7 d, K" p2 b0 w5 iexogenously7; however, we did not measure a dihy-! M- u1 ], M$ n* G* ^( h
drotestosterone level in our patient. In addition to
" V1 c1 z! `+ u6 R) A% Ovirilization, exposure to exogenous testosterone in+ H4 B+ S- e R. y) _
children results in an increase in growth velocity and
& f9 x7 k3 t$ a* D- G- radvanced bone age, as seen in our patient.0 T. v7 r! ]7 v0 A& J
The long-term effect of androgen exposure during
4 T* F! b( O' `+ c# e4 b, a( _early childhood on pubertal development and final$ g1 c% @) ^. N7 f' f
adult height are not fully known and always remain
5 F+ V( l6 @* }5 ~% y; ga concern. Children treated with short-term testos-
0 [) B. \- y7 I% y1 ~terone injection or topical androgen may exhibit some, w/ K, q) E% ]& g) |* P, v' q& L6 `5 z
acceleration of the skeletal maturation; however, after
* L: M2 t; M$ x3 ~5 q* x0 o- H/ fcessation of treatment, the rate of bone maturation6 @; {) }+ A8 e: D" m
decelerates and gradually returns to normal.8,9! |* ^* C& k$ y: a& E9 l
There are conflicting reports and controversy
& o7 |! C# x: e+ w tover the effect of early androgen exposure on adult
& D2 ^4 r* V3 D0 l( _/ R. v/ Xpenile length.10,11 Some reports suggest subnormal
8 I2 i9 X7 D6 v) t! A8 {4 _adult penile length, apparently because of downreg-( Q3 o z2 s1 ^4 f$ l! D
ulation of androgen receptor number.10,12 However,- G+ |3 S( s; o9 c0 L8 H; y
Sutherland et al13 did not find a correlation between! y2 J3 X, h% z( l' {" T2 h6 b
childhood testosterone exposure and reduced adult
8 b3 k- U5 W8 Y0 Kpenile length in clinical studies.
3 `: B7 F' k$ @; Y. l. O5 V* Q$ O' _) @Nonetheless, we do not believe our patient is
5 E2 {, u' |+ Z4 ^/ rgoing to experience any of the untoward effects from
4 k+ Y% E. j* Dtestosterone exposure as mentioned earlier because
$ \; h( z7 T3 k/ t" Wthe exposure was not for a prolonged period of time.
# b' v8 s4 f; {9 xAlthough the bone age was advanced at the time of
4 W6 Q! d) W1 G1 a0 A1 \diagnosis, the child had a normal growth velocity at; ?; v* k4 |- u- n# S
the follow-up visit. It is hoped that his final adult1 [* r0 A2 `( O$ @7 u+ {& e+ r
height will not be affected.
; u+ z. E( x% k3 V& ]Although rarely reported, the widespread avail-
2 c- ]* X/ Z: w+ Oability of androgen products in our society may( ?5 y/ \! v I
indeed cause more virilization in male or female
# Z6 _3 X5 [0 v& y2 Y# _children than one would realize. Exposure to andro-! f, s( S; k* n. f
gen products must be considered and specific ques-
n& [+ U0 {: G( v2 ~) stioning about the use of a testosterone product or$ M. T" }2 N8 B
gel should be asked of the family members during
" g+ s5 n! Z4 R8 m! D( s3 f* ithe evaluation of any children who present with vir-
3 j3 Q; v: ^. kilization or peripheral precocious puberty. The diag-
. Z, t2 }2 }# o% \9 {! jnosis can be established by just a few tests and by
% ?% g C, T0 w4 L. oappropriate history. The inability to obtain such a
8 ^# j2 Q: Y% b B1 Yhistory, or failure to ask the specific questions, may5 M7 m3 m9 U) W6 b& E; F$ _
result in extensive, unnecessary, and expensive8 X. ]# n* h( j* d$ P* s. m
investigation. The primary care physician should be
. X0 x1 H, ?- A4 raware of this fact, because most of these children/ W( W/ u, D& {. @* }' F6 [
may initially present in their practice. The Physicians’
! ~; |( T( `' P2 Y! E, tDesk Reference and package insert should also put a1 F. p8 @! d; K! {& v& \; W
warning about the virilizing effect on a male or
/ n( v a" I. r: qfemale child who might come in contact with some-
" N' I& H5 o* ^ ^5 h H5 N8 uone using any of these products.
. i' z" f& l1 [4 vReferences4 P5 ?& H( Y6 r! C
1. Styne DM. The testes: disorder of sexual differentiation% ^# Y6 J* E, f% {+ B1 q$ M
and puberty in the male. In: Sperling MA, ed. Pediatric
' [: L+ `' A* z- o' }Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;/ m6 |+ Y1 y8 q; }9 R0 F+ f5 P# g
2002: 565-628.; ^* s/ \+ H4 a" _& B; p
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
* [+ O2 F% p4 [puberty in children with tumours of the suprasellar pineal
' K2 O# Y( @9 |$ ~9 [6 Y8 Aat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
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7 M# u* N. I, f7 v4 Nareas: organic central precocious puberty. Acta Paediatr.
n. q, ^! H; \2001;90:751-756.8 ?. d e' ?) b) @- k( C, p6 c
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Pediatric Endocrinology. 4th ed. New York, NY: Marcel
, x6 o1 S' s6 h5 @9 YDekker Inc; 2003:211-238.
+ x3 d1 e0 E1 a4 I4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
7 G6 g( i% k: ?7 Bdevelopment in a two-year-old boy induced by topical
2 d: K# y2 q9 w. ~/ z/ fexposure to testosterone. Pediatrics. 1999;104:e23.+ v* V8 }( H8 T5 o
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
$ M+ s2 D0 ~0 z5 ~Skeletal Development of the Hand and Wrist. 2nd ed.
( y$ v( d: X( Y! W, p% G% Y; BStanford, CA: Stanford University Press; 1959./ E+ m7 i; H7 E$ Y, X6 f/ n2 o- P
6. Physicians’ Desk Reference. Androgel 1% testosterone,
2 _& W* ~; C1 m0 zUnimed Pharmaceutical Inc. Montvale, NJ: Medical) r- c) p( T4 [
Economics Company, Inc; 2004:3239-3241.
, y. } o/ N' v, ?1 {! r7. Klugo RC, Cerny JC. Response of micropenis to topical
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