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is a significant concern for physicians. Central' a+ _: Y2 _7 _ c% S2 X2 J
precocious puberty (CPP), which is mediated
& Y; X, K- e, L# {4 Jthrough the hypothalamic pituitary gonadal axis, has
: _" N' R; J3 V9 _a higher incidence of organic central nervous system
5 D+ f# ]- |* h( e& ^+ y+ Jlesions in boys.1,2 Virilization in boys, as manifested( ^5 X# |# g" r; n: q( P5 {' _
by enlargement of the penis, development of pubic i3 ?. u) Y/ K G
hair, and facial acne without enlargement of testi-- h. [* s7 P. ?" R: U
cles, suggests peripheral or pseudopuberty.1-3 We
0 L6 S* |" A n' S& K- M- mreport a 16-month-old boy who presented with the
0 D1 u% ~; I) g. t6 ~% Eenlargement of the phallus and pubic hair develop-0 j3 T) T+ z! Q3 p
ment without testicular enlargement, which was due5 T( w* I! c, ^. @9 i- M
to the unintentional exposure to androgen gel used by
1 L8 h9 e) P6 S) c6 _6 ?the father. The family initially concealed this infor-% H# \7 Q: ^! f0 c
mation, resulting in an extensive work-up for this
- `$ }! f. Y7 Bchild. Given the widespread and easy availability of3 _, v* N6 X/ [; l* D5 Q
testosterone gel and cream, we believe this is proba-
4 E) K J% f3 rbly more common than the rare case report in the
# k& \- Z2 t: ?% T7 X' Hliterature.4
8 y8 e/ T& P& b; P; s" Q GPatient Report
) C2 v0 o( j# _3 bA 16-month-old white child was referred to the
0 p. W2 a& x' j' n4 i! a! C6 kendocrine clinic by his pediatrician with the concern
! ^# B! p# {# |" y9 i# Tof early sexual development. His mother noticed
7 w- O9 L A1 h4 D2 z3 _light colored pubic hair development when he was
* R) u7 F3 n3 EFrom the 1Division of Pediatric Endocrinology, 2University of8 q9 J3 ^2 ~/ n& l! F) Y, J5 u
South Alabama Medical Center, Mobile, Alabama.$ I- w5 s, g" t- m9 ?8 [3 K& O' w
Address correspondence to: Samar K. Bhowmick, MD, FACE,
: K0 Q* y W2 B8 SProfessor of Pediatrics, University of South Alabama, College of
2 ^' D7 H6 P: sMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
, Q. A% R1 H/ a: de-mail: [email protected].
) W7 V2 h0 B) r# a: j2 Babout 6 to 7 months old, which progressively became
. h' P; ~; q" R4 m T/ bdarker. She was also concerned about the enlarge-2 @( w) e4 Q0 W3 B' d
ment of his penis and frequent erections. The child$ ?' Q& g9 F$ f+ }* m; ?. e$ `
was the product of a full-term normal delivery, with, Y: Y6 `( O8 e- Q
a birth weight of 7 lb 14 oz, and birth length of- q5 y( E/ Z# W9 r2 C- n o
20 inches. He was breast-fed throughout the first year
' K. U( ]- q2 q# g/ ?. |0 vof life and was still receiving breast milk along with
, i8 `4 G8 @1 `3 l- u3 M8 N- Xsolid food. He had no hospitalizations or surgery,+ t- a, ^. }, S8 g# { i
and his psychosocial and psychomotor development
Z0 O4 |8 x9 w8 h) l: Z8 w8 Mwas age appropriate.
- c W4 v! t$ o- g9 l( A! }The family history was remarkable for the father,0 \+ c0 h4 k+ X2 V8 g3 P# w8 h3 W7 U
who was diagnosed with hypothyroidism at age 16,
i! u H# \7 Owhich was treated with thyroxine. The father’s7 H$ ^& D* J e5 C
height was 6 feet, and he went through a somewhat# z# S O% m- e+ U+ ]0 x
early puberty and had stopped growing by age 14.
1 d% C( o; A n0 y0 \The father denied taking any other medication. The4 l$ D; L1 C- v y. f
child’s mother was in good health. Her menarche
& v8 T2 ?. v/ C; _; q) I( Gwas at 11 years of age, and her height was at 5 feet2 }* {! O# f4 t' [
5 inches. There was no other family history of pre-
; P( U) V0 Y6 lcocious sexual development in the first-degree rela-0 I q& z0 t. m( c" D+ K
tives. There were no siblings.
& F0 e% D( S) N+ s2 o* WPhysical Examination
9 i9 ?3 t9 s6 I- N0 e: t/ C3 sThe physical examination revealed a very active,
* t3 V* w! F- e) X. h$ Rplayful, and healthy boy. The vital signs documented$ U+ K" C# @5 `6 ?* ?
a blood pressure of 85/50 mm Hg, his length was
. [/ h+ ]0 I* l' z! I4 o/ v0 ~3 A2 z90 cm (>97th percentile), and his weight was 14.4 kg }; A5 j& g! X- x1 s( h; F
(also >97th percentile). The observed yearly growth
& j! K8 q$ U3 I6 g% [0 H& t& y+ Ovelocity was 30 cm (12 inches). The examination of
' V" `- l* F+ r4 R Xthe neck revealed no thyroid enlargement.5 i2 k8 t; q5 R9 I5 }
The genitourinary examination was remarkable for
5 `8 v9 f5 |0 S: Renlargement of the penis, with a stretched length of I; \4 Y W. s6 Z& s4 Z ?3 N6 {
8 cm and a width of 2 cm. The glans penis was very well
* r, | L. H, ^* O6 L* j0 i! |0 Vdeveloped. The pubic hair was Tanner II, mostly around, x7 G Z+ N+ l, G
540
/ z7 ~2 o# n' r% h/ d& Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
7 R" C" N; r! o' X- ]% mthe base of the phallus and was dark and curled. The; g3 q; Q5 j3 |2 \$ ]
testicular volume was prepubertal at 2 mL each.' @/ w, k7 U: y
The skin was moist and smooth and somewhat
2 L9 x, `1 M5 S- |oily. No axillary hair was noted. There were no" N- l3 V" ]* ]9 ]
abnormal skin pigmentations or café-au-lait spots.
) D( ^6 H0 f! j$ R: KNeurologic evaluation showed deep tendon reflex 2+* ]' I8 q4 I9 [! m
bilateral and symmetrical. There was no suggestion( a% B8 y6 H T. A3 R% Y, U
of papilledema.1 x/ a1 c' }% q5 y; G2 \ C& ~
Laboratory Evaluation. I: l; A. f" f. b1 X" ~8 L
The bone age was consistent with 28 months by- T* I5 V# A: L, z: N- u! R1 R9 w
using the standard of Greulich and Pyle at a chrono-! m, W- G! r; f2 e; D0 T" p
logic age of 16 months (advanced).5 Chromosomal
2 [; Z: }4 l: X+ T: f! Okaryotype was 46XY. The thyroid function test" {) ~. h P& P% n/ U5 e% F
showed a free T4 of 1.69 ng/dL, and thyroid stimu-5 h0 l: a* X9 m
lating hormone level was 1.3 µIU/mL (both normal).
0 C! A( O( a" @; c) ~The concentrations of serum electrolytes, blood
0 z, c7 @$ D1 kurea nitrogen, creatinine, and calcium all were6 W9 [: Z' ~, E& C: B- {8 r
within normal range for his age. The concentration
, E! ^5 v3 s% t; {of serum 17-hydroxyprogesterone was 16 ng/dL! ~! Z6 m" _4 V& }8 W7 d
(normal, 3 to 90 ng/dL), androstenedione was 209 [6 \. |* B# `; a c7 K
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
* q2 M1 {5 A/ k4 A mterone was 38 ng/dL (normal, 50 to 760 ng/dL),
5 I9 ~- s5 r6 L% Q. F8 v% kdesoxycorticosterone was 4.3 ng/dL (normal, 7 to; @: S- p7 P% m9 N1 b' U
49ng/dL), 11-desoxycortisol (specific compound S)
) f' H: [$ O3 X! ?: M& a5 nwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ S6 R8 s2 B( Itisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total; g$ n# D- v/ t; X
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
; |4 G# j' w ~+ O# K9 C/ q9 sand β-human chorionic gonadotropin was less than
8 g1 J. x* A# b3 f& U. r& z5 mIU/mL (normal <5 mIU/mL). Serum follicular
' A0 @7 s1 _4 ]& Y" ?/ M9 Bstimulating hormone and leuteinizing hormone/ s+ D0 E+ |% X& W! L" A
concentrations were less than 0.05 mIU/mL% I! ]) ~1 }! C# k
(prepubertal).# ]/ e0 Q9 A6 C9 t
The parents were notified about the laboratory6 u) b1 y' q/ m3 D# X7 h
results and were informed that all of the tests were
: m, f% F/ P, B0 [$ z9 pnormal except the testosterone level was high. The
/ i/ C+ Y6 t" R, U/ A/ i+ Qfollow-up visit was arranged within a few weeks to! `0 N% \* \+ t/ z0 b2 J7 X
obtain testicular and abdominal sonograms; how-9 `2 X w) A* l$ y; C" F
ever, the family did not return for 4 months.
- b1 d# p& g3 |Physical examination at this time revealed that the8 i$ k/ m* \7 a: B6 d' \6 |; v
child had grown 2.5 cm in 4 months and had gained
4 l0 l4 a' z7 i; J! j2 kg of weight. Physical examination remained
1 b4 {' G! T. _unchanged. Surprisingly, the pubic hair almost com-1 R2 Y$ L! C! H3 u& s( V
pletely disappeared except for a few vellous hairs at
2 ?) _1 b* [" V+ I& Bthe base of the phallus. Testicular volume was still 2* t8 s/ u) @2 V6 ?4 W/ i0 d# X
mL, and the size of the penis remained unchanged.$ ~, i# s( B) J2 m2 \; B
The mother also said that the boy was no longer hav-
3 ~6 x* Z: O+ F' ving frequent erections." p! c6 g9 {" G( \) ~
Both parents were again questioned about use of- x/ ^- S8 {/ P( [9 G5 r0 K# }
any ointment/creams that they may have applied to
9 R, u& O9 ?! `; r' H! ~2 Jthe child’s skin. This time the father admitted the) J, p# t& c& f5 k# D0 | y3 f
Topical Testosterone Exposure / Bhowmick et al 541# G, X3 ^9 _2 U
use of testosterone gel twice daily that he was apply-
; N* z6 k! g1 D$ Ming over his own shoulders, chest, and back area for% a! ] T, d9 m2 j! V9 M/ _
a year. The father also revealed he was embarrassed
$ s& ^$ S2 Y0 |5 t; ~. C. }to disclose that he was using a testosterone gel pre-
* }- T. b& k6 }1 S, xscribed by his family physician for decreased libido8 ]8 N x0 U% V& t; B- \
secondary to depression.6 [- z1 ^+ u3 t/ w: D5 m
The child slept in the same bed with parents.
, k$ I# V5 A$ k, `2 U/ YThe father would hug the baby and hold him on his/ e" [; I A- J" f# ~8 W
chest for a considerable period of time, causing sig-( F( {" ~' Q( M; a2 ~5 ?: E
nificant bare skin contact between baby and father.+ w3 V) W* F$ H
The father also admitted that after the phone call,
/ V3 W4 F9 a p7 @when he learned the testosterone level in the baby
9 I% [1 a1 D4 u! S! Ywas high, he then read the product information
- a* l1 V V/ ^( C% D% cpacket and concluded that it was most likely the rea-* f: y; S! I0 \. ]8 z
son for the child’s virilization. At that time, they8 A' ~* e7 }+ ?4 e
decided to put the baby in a separate bed, and the z& }) ^3 ]' `+ u* Z8 x7 j
father was not hugging him with bare skin and had
* V6 L6 ~1 C' E* A3 S9 \been using protective clothing. A repeat testosterone
' D$ q2 U" l/ c( Y* Gtest was ordered, but the family did not go to the6 u, \- z; o; S' H v, r7 {/ K* i
laboratory to obtain the test., {6 h) l! S" W; C" V$ |
Discussion( ^5 Q) }: } `* z& k5 S0 p8 P
Precocious puberty in boys is defined as secondary
. ]- h% K" t9 Bsexual development before 9 years of age.1,45 ^2 S6 U e, N
Precocious puberty is termed as central (true) when
; y% f$ E1 m+ [/ v1 }) }it is caused by the premature activation of hypo-
( g5 R+ U- S; \0 b1 W. H$ gthalamic pituitary gonadal axis. CPP is more com-
" S) c2 ~3 q8 ^2 [mon in girls than in boys.1,3 Most boys with CPP
* p/ w3 J. T* q% C9 b- e% {8 G) Lmay have a central nervous system lesion that is
- @) j; O1 Z' N" C4 Y$ U$ gresponsible for the early activation of the hypothal-7 v$ D' }( m, n: i1 T" E
amic pituitary gonadal axis.1-3 Thus, greater empha-$ U k! n3 n. z" h. A
sis has been given to neuroradiologic imaging in0 E2 `1 m- F6 Y; H1 U8 j" f" Q
boys with precocious puberty. In addition to viril-- H2 ]7 k- n* U G c/ `
ization, the clinical hallmark of CPP is the symmet-/ q* T |0 V- b( h- J
rical testicular growth secondary to stimulation by
% Y" v8 d1 c; z- ~2 H+ vgonadotropins.1,3
4 k/ p# @' z$ T9 [) t" tGonadotropin-independent peripheral preco-
5 o! H& M3 m4 |" S( }/ j; K% J% }* `cious puberty in boys also results from inappropriate
7 @0 M7 V( e y2 D% i! O4 oandrogenic stimulation from either endogenous or) _2 J) l. Y* Q9 [6 ?
exogenous sources, nonpituitary gonadotropin stim-
* ] |/ ^ m' q6 x' c5 A$ @ulation, and rare activating mutations.3 Virilizing
4 G6 f' ?7 O- hcongenital adrenal hyperplasia producing excessive% k1 `4 ^: K& V: u* F
adrenal androgens is a common cause of precocious [4 y* v+ p2 l
puberty in boys.3,40 a' y9 ~. \) S
The most common form of congenital adrenal8 m7 [9 J& n: p: H
hyperplasia is the 21-hydroxylase enzyme deficiency.
0 L# W: S, T$ Y0 y5 H1 ~The 11-β hydroxylase deficiency may also result in
' @* {. i# [( a( X# Xexcessive adrenal androgen production, and rarely,, i, T6 C1 T+ b' P! L; e/ N
an adrenal tumor may also cause adrenal androgen0 |$ R* a- n6 z& h$ w
excess.1,3
/ I: e3 {/ }% g8 P0 E5 C% Tat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ {3 j6 N+ ~. x6 A- c: l
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 j) G) R# l, U2 H- @
A unique entity of male-limited gonadotropin-2 N9 p, P4 _: I" }9 `
independent precocious puberty, which is also known8 u: J0 {& i4 ~
as testotoxicosis, may cause precocious puberty at a" W1 X8 f2 K5 C" c# @
very young age. The physical findings in these boys5 I/ b0 i1 c# u, U5 y% H. l+ ^; c' ?
with this disorder are full pubertal development,
7 m6 b0 P# K3 q! k; s( Pincluding bilateral testicular growth, similar to boys
) @6 d3 ~* s; g; n5 S! jwith CPP. The gonadotropin levels in this disorder7 a/ |9 }# e, T9 P7 i
are suppressed to prepubertal levels and do not show
/ W2 V$ I, P7 h. e! rpubertal response of gonadotropin after gonadotropin-" e- v# n8 B' x
releasing hormone stimulation. This is a sex-linked4 u3 E4 L8 T) j$ i$ u
autosomal dominant disorder that affects only
/ i3 {, [7 f0 Z& \5 Zmales; therefore, other male members of the family
5 _# v1 g. V3 ]" z6 P! O2 Fmay have similar precocious puberty.3
' C2 [7 u) \' ^. W5 F5 QIn our patient, physical examination was incon-* t& F; g, i8 a- @: M, R! o9 d4 R
sistent with true precocious puberty since his testi-$ |; w$ x! @. ]
cles were prepubertal in size. However, testotoxicosis. j0 u, Z: C$ W- E
was in the differential diagnosis because his father' T( s+ R$ k0 C C* P4 E+ ^
started puberty somewhat early, and occasionally, l. h# M, Q# S: J' |$ |$ t" X" Y
testicular enlargement is not that evident in the9 W/ G4 |" }& N F+ ~. H
beginning of this process.1 In the absence of a neg-
+ Y; _* ]) a0 H: L2 O4 d7 oative initial history of androgen exposure, our6 m2 g4 B9 [& }; v2 |9 V/ F/ m; t
biggest concern was virilizing adrenal hyperplasia,
u: n+ N7 x8 K2 b4 u0 _' neither 21-hydroxylase deficiency or 11-β hydroxylase
: t' x* q; e. W- W' o: r1 Tdeficiency. Those diagnoses were excluded by find-6 A1 i7 Y& I* M0 ? f9 G9 F `
ing the normal level of adrenal steroids.1 ^$ r; k2 x' j" ^5 J; j$ O
The diagnosis of exogenous androgens was strongly3 I! ]' t; k# k8 ?% u2 [" V
suspected in a follow-up visit after 4 months because
0 m2 g5 ?5 b" E+ E8 c$ z1 xthe physical examination revealed the complete disap-
1 P: ]8 [/ g2 \3 ]1 Y1 e7 gpearance of pubic hair, normal growth velocity, and
! X/ _8 O# b9 @$ Ndecreased erections. The father admitted using a testos-8 @- K6 u! j5 u
terone gel, which he concealed at first visit. He was- X q( p& z7 w# j3 ]: R7 M
using it rather frequently, twice a day. The Physicians’$ H1 S3 e: Z* p5 ]# P; C, x4 m: N
Desk Reference, or package insert of this product, gel or
_3 ~4 V* \6 R, ^cream, cautions about dermal testosterone transfer to/ F' l6 r- s& H+ T! ^7 }" j
unprotected females through direct skin exposure.
. u: |7 b# }/ B6 B% `Serum testosterone level was found to be 2 times the
2 K% Z' ?/ v5 J" C6 Qbaseline value in those females who were exposed to( z# |/ E$ I/ \9 l( x; i
even 15 minutes of direct skin contact with their male
`5 ~9 b: `" `( A. ~partners.6 However, when a shirt covered the applica-5 g7 Q" P! e' l! K0 q3 H
tion site, this testosterone transfer was prevented.
% S9 h2 p; P, d6 ^Our patient’s testosterone level was 60 ng/mL,; j9 X* c, h" r
which was clearly high. Some studies suggest that& O7 i2 V( E# H/ c) M
dermal conversion of testosterone to dihydrotestos-4 k. K& H5 q. C7 z9 ]( x3 Y
terone, which is a more potent metabolite, is more
; T- d3 e3 k, [# u7 [active in young children exposed to testosterone
4 p8 ^& |, x2 J$ g& Bexogenously7; however, we did not measure a dihy-7 e5 n9 h: h, E2 E: ?
drotestosterone level in our patient. In addition to B( n5 G3 w2 T4 c
virilization, exposure to exogenous testosterone in
' v# h+ e6 k4 F2 o# m, Rchildren results in an increase in growth velocity and
5 x1 ?* S; V8 t5 q) |advanced bone age, as seen in our patient.3 X6 X! [9 p' a, H) l
The long-term effect of androgen exposure during
; a0 y# Q$ i; w$ H8 Searly childhood on pubertal development and final) ]. A1 d3 v0 J0 c" M% R" A+ t
adult height are not fully known and always remain
2 y {2 s& j' W' M6 ga concern. Children treated with short-term testos-
0 m Q# o4 v. @6 nterone injection or topical androgen may exhibit some g. J' v& E$ {# n- i/ q
acceleration of the skeletal maturation; however, after
# t; s9 u4 W- s7 ~: h( ccessation of treatment, the rate of bone maturation8 c8 y9 T; C4 l+ a2 c) J, W
decelerates and gradually returns to normal.8,91 A- t; R8 ?$ D F$ p' B/ h
There are conflicting reports and controversy
0 X; f4 q+ b H1 Z: X2 A% V9 }over the effect of early androgen exposure on adult4 f V6 ]0 `+ G
penile length.10,11 Some reports suggest subnormal( M9 v4 k4 ]* D W! l
adult penile length, apparently because of downreg-0 e2 z+ F( Y& n" A; L8 T
ulation of androgen receptor number.10,12 However,
) K( F! V! S, ]/ I9 ASutherland et al13 did not find a correlation between
, p4 K# a; U2 Q3 r. d( @childhood testosterone exposure and reduced adult
& }$ |( q. M" Zpenile length in clinical studies.! Y2 v+ Y3 w/ j+ X7 H' z4 T
Nonetheless, we do not believe our patient is
6 V9 f3 p. q) S1 o [3 | h$ Kgoing to experience any of the untoward effects from" N" ^/ l0 n. d+ O, P" m% f6 ?
testosterone exposure as mentioned earlier because
8 l0 O3 z6 Y4 {3 S) V' ythe exposure was not for a prolonged period of time.
1 w% Q" G) Z/ ?" QAlthough the bone age was advanced at the time of
' Q5 r, G& y2 @0 R6 W) z5 Pdiagnosis, the child had a normal growth velocity at: {3 O3 |( r9 L m: y) z
the follow-up visit. It is hoped that his final adult
6 h' o- R) F( ^/ N+ a) q* s. o: Hheight will not be affected.
$ F4 C9 u2 W! X9 u5 Q1 U+ NAlthough rarely reported, the widespread avail-5 @& }* i) @4 v p. ?0 _" D
ability of androgen products in our society may
8 o! W8 g; x7 z) E ~# Y ~indeed cause more virilization in male or female
& i/ p* q& w; |' Z: _4 X( y \children than one would realize. Exposure to andro-0 M! M3 i1 b' o$ |: f# {
gen products must be considered and specific ques-* D: k! d- I" x8 a
tioning about the use of a testosterone product or8 P1 Q- ?# z% e* o
gel should be asked of the family members during
; v# H9 L4 a, Y5 Zthe evaluation of any children who present with vir-
# q0 {* O9 o( c. B; [ilization or peripheral precocious puberty. The diag-5 h7 _. X5 S; \- h* U; N% d
nosis can be established by just a few tests and by
+ S2 R" w0 ~4 r [1 Gappropriate history. The inability to obtain such a- y$ @! C3 Z9 A, }
history, or failure to ask the specific questions, may
0 B, h1 l- L/ v, g8 Bresult in extensive, unnecessary, and expensive4 q% F, ~, I- u8 x( \7 l
investigation. The primary care physician should be& A# o' `8 M0 j v0 D; r7 x T! C
aware of this fact, because most of these children
( l- f, h* r$ i" v4 M: @; Vmay initially present in their practice. The Physicians’
* V4 j* }# E$ F2 u7 m+ mDesk Reference and package insert should also put a
: P% G8 s% \7 T% Twarning about the virilizing effect on a male or; G3 ]2 D; D4 R4 S
female child who might come in contact with some-+ Y4 X. ]* H3 H+ o J7 u% c X
one using any of these products.
6 |3 P: b+ s# p: z7 ~# ~References
$ T$ \, t: R8 S: G; R5 \8 |1. Styne DM. The testes: disorder of sexual differentiation
2 s, z0 F1 T: i9 a- V8 wand puberty in the male. In: Sperling MA, ed. Pediatric
% H8 c6 H5 V. ]3 A; tEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 f# o, H, n9 \7 t6 |& R- B2002: 565-628.7 f, F6 [* Z/ _0 x
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
9 O% |5 q6 Z- F+ r+ t& ^( Qpuberty in children with tumours of the suprasellar pineal+ d+ X( f8 K3 b& |
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 l" j6 _6 a" F4 S F: b
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! {4 i$ A" s3 {8 sareas: organic central precocious puberty. Acta Paediatr.4 |2 | H0 c: C
2001;90:751-756.
) M+ J, D9 ?3 e3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
' F( L0 K8 j! |/ D/ J2 c0 lPediatric Endocrinology. 4th ed. New York, NY: Marcel
* } x; l7 x. l! x2 bDekker Inc; 2003:211-238.
8 D) z+ D7 `. M$ a# H& c \' i4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual# t& ~, E2 c! i% @" K2 i
development in a two-year-old boy induced by topical0 G7 y+ v8 s3 X# v4 f% z
exposure to testosterone. Pediatrics. 1999;104:e23.
) _' O& _) {: ?5 K, f5. Greulich WW, Pyle SI, eds. Radiographic Atlas of! Q9 e; k: v% Y& _; x
Skeletal Development of the Hand and Wrist. 2nd ed.* W( n" o2 A+ P: s' N
Stanford, CA: Stanford University Press; 1959.; W' G2 ^1 H7 o
6. Physicians’ Desk Reference. Androgel 1% testosterone,
' o& y7 @% S9 Q1 UUnimed Pharmaceutical Inc. Montvale, NJ: Medical
( F( A1 m3 H* C! k$ m2 iEconomics Company, Inc; 2004:3239-3241.
' F u# t* p2 m' H5 }0 U# K7. Klugo RC, Cerny JC. Response of micropenis to topical
9 q5 ]( i4 q2 V# m9 ]# ttestosterone and gonadotropin. J Urol. 1978;119:
* p" v) R% b4 G) z0 Q; F* Z8 C667-668.
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