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is a significant concern for physicians. Central
: Z# K( z7 C: X7 d- s* U3 cprecocious puberty (CPP), which is mediated1 `7 I" |1 y1 e. c1 A" l: ^+ O
through the hypothalamic pituitary gonadal axis, has* S1 Q1 x; ?8 ~9 u; w
a higher incidence of organic central nervous system
3 T, E/ @+ c7 j1 q% nlesions in boys.1,2 Virilization in boys, as manifested7 ?1 _5 S! E: R. {5 u
by enlargement of the penis, development of pubic
& q5 h% Z6 W* T; D/ s2 z/ A8 q. ?1 Ohair, and facial acne without enlargement of testi-/ \* O P8 r8 l! Z
cles, suggests peripheral or pseudopuberty.1-3 We: @' L+ `4 ?# _; I3 Q$ K
report a 16-month-old boy who presented with the4 R% \# M; D4 p, v
enlargement of the phallus and pubic hair develop-
/ K+ K3 |. h0 H9 D7 d. ]) P% ~ment without testicular enlargement, which was due: D5 ^0 w# D6 y3 x; K- D- } E
to the unintentional exposure to androgen gel used by, a$ l) z& Z4 H; ]) O( O# C% A
the father. The family initially concealed this infor-
0 k5 b" F& {1 R" ?mation, resulting in an extensive work-up for this3 l$ r! v1 L0 B: y4 h) q8 c
child. Given the widespread and easy availability of
# H4 ^% F, W: ]9 A$ [* Q/ e8 rtestosterone gel and cream, we believe this is proba-/ R4 n( K. l& H. Z
bly more common than the rare case report in the
0 O% X8 J& ~/ D# d1 x- v+ P- rliterature.4! |+ }: t! c7 z o8 j
Patient Report
# A; g+ A% R% Y3 g2 b9 ^! UA 16-month-old white child was referred to the
+ [( L0 ~% B" ^7 sendocrine clinic by his pediatrician with the concern# B0 |. D! _; s/ P A
of early sexual development. His mother noticed& n4 d" o0 ]) x9 o0 K1 u! j* `
light colored pubic hair development when he was
: t* _' ]1 c7 L6 X; c @From the 1Division of Pediatric Endocrinology, 2University of
R0 i' _* [$ d5 u; uSouth Alabama Medical Center, Mobile, Alabama.3 r$ J' k X+ Z$ P& n V: d
Address correspondence to: Samar K. Bhowmick, MD, FACE,; X+ q0 [. W6 ]& H
Professor of Pediatrics, University of South Alabama, College of( U5 s# B0 b3 `% Z
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;* ?! G& B, @- L P+ A
e-mail: [email protected].
! n* F$ b' t5 n" u( N0 a, ?. T' z# Jabout 6 to 7 months old, which progressively became9 S* X' |! J: W y* c1 O
darker. She was also concerned about the enlarge-
- ]* k, K+ Z$ Q! qment of his penis and frequent erections. The child
, N- S) h' {, r; Y% q: Jwas the product of a full-term normal delivery, with2 G# b9 ~. k7 K! q/ h
a birth weight of 7 lb 14 oz, and birth length of/ E+ }1 H; e& P' i V# }9 ~4 f# o
20 inches. He was breast-fed throughout the first year8 ~( M& [ E/ L; D4 n) R5 j
of life and was still receiving breast milk along with4 J* r% E" e! z& d1 b
solid food. He had no hospitalizations or surgery,! Q z2 Q/ v/ q9 }9 Q
and his psychosocial and psychomotor development
- G8 p8 G1 @( ^% Pwas age appropriate.4 X) W5 s" O9 U7 Y$ T8 W# [
The family history was remarkable for the father,* _* B% R! \( v9 h3 ]2 B
who was diagnosed with hypothyroidism at age 16,
. ]: S7 [- f R* x+ ?which was treated with thyroxine. The father’s
0 [3 r* S0 H8 A. G0 _. pheight was 6 feet, and he went through a somewhat" Q8 y4 v& d' I" M
early puberty and had stopped growing by age 14.
0 h5 e$ t- r6 HThe father denied taking any other medication. The
9 d, m S7 m1 X# W8 Kchild’s mother was in good health. Her menarche
, o% E' b" \) j; V X* ^was at 11 years of age, and her height was at 5 feet
; {% R) M( v+ |7 ]6 b, j- x/ o4 D5 inches. There was no other family history of pre-
# D3 z, c: o# Z% {* S3 J {! ncocious sexual development in the first-degree rela-& r# Q' V) k8 e) a
tives. There were no siblings.
9 V* m# w' [% c* l& a$ _Physical Examination
# I' E, s9 \6 i% t) G% t6 rThe physical examination revealed a very active,' W( S! [+ K5 n% u# K( D
playful, and healthy boy. The vital signs documented! }# s F( M4 T* i2 Y" M" L
a blood pressure of 85/50 mm Hg, his length was
; c2 u8 e3 l; J4 b90 cm (>97th percentile), and his weight was 14.4 kg
0 X# ~) q1 A# m3 A& k1 a3 }3 y3 {(also >97th percentile). The observed yearly growth
) R# k" `6 Z) l6 Z( V4 vvelocity was 30 cm (12 inches). The examination of
! s: ^/ F$ O8 @8 I) ^0 Ithe neck revealed no thyroid enlargement.
; d: K+ L. o) O. R' UThe genitourinary examination was remarkable for
4 o8 B/ V& I" f$ a% t. @( denlargement of the penis, with a stretched length of
; Z6 Y: Z$ l4 D1 T" x8 cm and a width of 2 cm. The glans penis was very well
/ |) m2 x/ j. K! w7 v( ddeveloped. The pubic hair was Tanner II, mostly around
. i. E' U" x2 m3 E+ c( L5409 n$ A4 }9 [% H7 @
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 h U& y" L: g$ M5 `the base of the phallus and was dark and curled. The w: `4 |* M; v, I
testicular volume was prepubertal at 2 mL each.) Q& p( A0 V# P4 Q' {! K7 T
The skin was moist and smooth and somewhat
( R [! Y4 y7 X8 J( @oily. No axillary hair was noted. There were no
" k* q7 c) W/ o9 F! babnormal skin pigmentations or café-au-lait spots.1 V5 Q9 E7 y4 R7 w0 v
Neurologic evaluation showed deep tendon reflex 2+- l) q& I r8 p3 p2 O0 X4 p
bilateral and symmetrical. There was no suggestion
) ~7 F, j: A+ rof papilledema.
& f; u; L- K" _1 dLaboratory Evaluation
; i4 d1 c5 ~4 R1 x" cThe bone age was consistent with 28 months by
- x' n+ z) d+ C% v' ]using the standard of Greulich and Pyle at a chrono-" B9 @' P- o2 ^/ G9 ^) ]
logic age of 16 months (advanced).5 Chromosomal( W) O3 O3 b6 ~8 T- V: g0 L' u/ S( h6 t
karyotype was 46XY. The thyroid function test
$ q% P$ z9 h$ ishowed a free T4 of 1.69 ng/dL, and thyroid stimu- d! k# m8 S4 [2 R/ [
lating hormone level was 1.3 µIU/mL (both normal).. o, ]' r& z) X- ~% I: a' \% E
The concentrations of serum electrolytes, blood) n) R& k* E& [' f/ B! A' z' n7 F
urea nitrogen, creatinine, and calcium all were
% s3 d( ?9 e% swithin normal range for his age. The concentration$ E5 W& I7 H0 v" h+ S1 D, x
of serum 17-hydroxyprogesterone was 16 ng/dL
+ e$ `" z6 _$ l. E' `' X0 \+ Z(normal, 3 to 90 ng/dL), androstenedione was 20' J2 P6 G$ Q4 e2 ]( k" u- t9 g
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
) n8 ]: r4 [0 R. q$ b& v) [terone was 38 ng/dL (normal, 50 to 760 ng/dL),
4 j: q+ [0 m6 g+ T' Jdesoxycorticosterone was 4.3 ng/dL (normal, 7 to; `* u( k7 D, x$ |
49ng/dL), 11-desoxycortisol (specific compound S)5 }& w! m. s& _! Q6 q0 t( _
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
, p5 k, v6 t7 s9 H. W9 Ztisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
$ S1 h# `2 E4 J9 @; mtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
, w7 t6 W: J7 J6 D9 C! Z' ^and β-human chorionic gonadotropin was less than# p6 ?7 Y' v! B2 o7 c2 i! n0 V+ a4 o
5 mIU/mL (normal <5 mIU/mL). Serum follicular5 f9 g. Z. S. d/ o1 ^ O& ?
stimulating hormone and leuteinizing hormone! S; ~. N( t% t8 X6 c4 `
concentrations were less than 0.05 mIU/mL
/ U- }! ?7 Q6 k" j# c(prepubertal).
! ~2 Y9 ~& D* fThe parents were notified about the laboratory
' X, r( d( H0 \& \7 d/ m% Lresults and were informed that all of the tests were
* ^& a5 Y0 w7 k& Q6 fnormal except the testosterone level was high. The/ r# C* m; t% J# J8 J! O' l
follow-up visit was arranged within a few weeks to! V! W4 o9 U' M$ Z
obtain testicular and abdominal sonograms; how-" R9 L, q4 \- {/ L( U8 Q4 p
ever, the family did not return for 4 months. e: x, {/ }8 c8 A
Physical examination at this time revealed that the
0 Z* T2 ~. A* jchild had grown 2.5 cm in 4 months and had gained
# N3 h# S# _5 P0 @0 _4 ~2 kg of weight. Physical examination remained
# H3 S- K" c' k( yunchanged. Surprisingly, the pubic hair almost com-- [# ?0 M; T+ M4 a, @& c. a
pletely disappeared except for a few vellous hairs at6 n k: k0 t. F$ {2 l# c
the base of the phallus. Testicular volume was still 2 j3 v1 D: }( [& J b
mL, and the size of the penis remained unchanged.
) j: h X) e& s: U0 L" mThe mother also said that the boy was no longer hav-1 r1 G$ h8 F7 ^& E/ L4 s
ing frequent erections.
4 `0 ]% O) b0 @7 _Both parents were again questioned about use of
* t! [* Z0 C f# y2 Sany ointment/creams that they may have applied to9 x+ P! L# W0 D7 H
the child’s skin. This time the father admitted the* n g, H! n% c4 o* Z% [( O8 A
Topical Testosterone Exposure / Bhowmick et al 541
) s I- J* g: b5 Quse of testosterone gel twice daily that he was apply-
4 j5 J! c- O5 S, k1 [ing over his own shoulders, chest, and back area for2 Y) r5 B3 V e1 Y$ E' y, B
a year. The father also revealed he was embarrassed% _5 k: l8 }( t
to disclose that he was using a testosterone gel pre-
: w; G% R0 V( n6 Wscribed by his family physician for decreased libido
& X. {6 G/ U" c, P6 p& E: dsecondary to depression., Y6 E! x4 Z- f9 o, l
The child slept in the same bed with parents.6 }1 ~% P ^ p. c% j/ G
The father would hug the baby and hold him on his
: `" V* ~+ o8 }1 I& v5 }; E1 Qchest for a considerable period of time, causing sig-$ @4 s) X4 [0 A
nificant bare skin contact between baby and father.) |+ v7 x0 `% I; A: F; m* y& x/ Y
The father also admitted that after the phone call,3 G5 _3 C: o! O+ S3 |
when he learned the testosterone level in the baby, z+ u- h( V# l4 r5 @9 V
was high, he then read the product information
* v) a! v1 `5 I* D+ O! hpacket and concluded that it was most likely the rea-
" Y; M; Y! Q' j- Bson for the child’s virilization. At that time, they8 }. M3 {3 [1 g6 q b
decided to put the baby in a separate bed, and the1 D( u3 p. @' y1 i# H
father was not hugging him with bare skin and had
' K& ], o9 i# @been using protective clothing. A repeat testosterone
& x9 o# H( \0 R% V5 ~3 J0 Rtest was ordered, but the family did not go to the
" H- K' K: w7 y! S. \( l. X! h" qlaboratory to obtain the test.
9 f" w+ x, t+ I: m, m/ {Discussion2 h9 O8 Q8 M" u( v9 u% z+ w
Precocious puberty in boys is defined as secondary
# k: t; K, x- q1 d: y$ i1 S; F( Tsexual development before 9 years of age.1,4
1 A% u i, Q( t7 Z3 W" KPrecocious puberty is termed as central (true) when
$ S* Z0 K6 O! I# Z" w* git is caused by the premature activation of hypo-
, W* m; h; W. Y7 F+ Ithalamic pituitary gonadal axis. CPP is more com-! W3 l/ |6 m8 w% M
mon in girls than in boys.1,3 Most boys with CPP
2 z- [+ n4 t7 [# n1 P/ v. \may have a central nervous system lesion that is( ^" q$ K: ?- F: M
responsible for the early activation of the hypothal-
0 u& U% |$ R" V' h( Pamic pituitary gonadal axis.1-3 Thus, greater empha-
3 a" T" z" C: Y7 |( zsis has been given to neuroradiologic imaging in) R9 N- r' ~, v, _; A* A
boys with precocious puberty. In addition to viril-/ |) j+ j7 E7 k' F
ization, the clinical hallmark of CPP is the symmet-4 K) C Y/ a% Z0 k( C3 i
rical testicular growth secondary to stimulation by
5 Q, [9 q" x$ p( A, X7 p, vgonadotropins.1,3
K; K( r3 \% m5 |9 QGonadotropin-independent peripheral preco-0 R3 a( T3 J; M& m+ q( U' Z0 \
cious puberty in boys also results from inappropriate
C- s7 o' Y: l& Mandrogenic stimulation from either endogenous or0 c- ^, M' V& p, {& `4 H+ A$ Z
exogenous sources, nonpituitary gonadotropin stim-
& Q- \4 W! M$ b& h# ?* z! [/ b! S/ qulation, and rare activating mutations.3 Virilizing
5 J$ _% q n! f& R6 R+ ^2 pcongenital adrenal hyperplasia producing excessive
$ B8 d2 z3 T9 c3 G2 Wadrenal androgens is a common cause of precocious
( D% u* y3 @* T @puberty in boys.3,4
8 m' C( Y+ Z- Z0 ^8 VThe most common form of congenital adrenal5 N4 ^0 _3 z' f/ V* B
hyperplasia is the 21-hydroxylase enzyme deficiency.6 @' a3 o/ e n. E
The 11-β hydroxylase deficiency may also result in& O3 l9 V) _/ f1 }0 H2 V7 k
excessive adrenal androgen production, and rarely,2 h; d! }" {0 h. i) P. v' g
an adrenal tumor may also cause adrenal androgen+ P, l. v5 @4 z6 Q
excess.1,3 W& `; D1 g. C1 o8 J- @5 V& I
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from2 `* c* E8 @6 \0 Y1 J2 p7 T
542 Clinical Pediatrics / Vol. 46, No. 6, July 20074 D O/ m/ I8 T: k
A unique entity of male-limited gonadotropin-6 N" _& ~$ F" ^
independent precocious puberty, which is also known
; S1 E: Q/ D* b, ]$ h& p! ~3 m! Nas testotoxicosis, may cause precocious puberty at a& `0 ?. I' b* o7 I
very young age. The physical findings in these boys( c& r$ i3 w: u+ v
with this disorder are full pubertal development,
1 U/ W, Y9 {6 Q0 M, u4 H! S. v; eincluding bilateral testicular growth, similar to boys; d+ K$ L) O; u+ ]
with CPP. The gonadotropin levels in this disorder
3 Z3 M) \# q+ M, Aare suppressed to prepubertal levels and do not show
* I' P d3 ?! s' r" Rpubertal response of gonadotropin after gonadotropin-
" Z# F! }% H5 y# {6 r4 `releasing hormone stimulation. This is a sex-linked
/ a. D% `# Q9 A& wautosomal dominant disorder that affects only
" Q! w: y& T$ t: G: F1 Amales; therefore, other male members of the family1 C1 d- p9 N5 Q; E# @6 e/ E
may have similar precocious puberty.32 {$ g" Q A( k8 s& I3 _- Q
In our patient, physical examination was incon-$ f/ H/ @6 E2 J8 u) J
sistent with true precocious puberty since his testi-
$ V9 c5 A1 r Zcles were prepubertal in size. However, testotoxicosis. W) p1 O4 U/ W8 w* U0 Q& r
was in the differential diagnosis because his father
3 `0 |8 @- {- |, M2 z/ `started puberty somewhat early, and occasionally,
$ |7 p7 k4 H [testicular enlargement is not that evident in the: S: U5 Y# W8 E- a" T$ W" \/ L$ U& I
beginning of this process.1 In the absence of a neg-! r) _5 D: Q) N/ P$ P0 g m
ative initial history of androgen exposure, our* G( l+ ~, G1 u2 r
biggest concern was virilizing adrenal hyperplasia,/ o9 K; T/ ?" [1 a" a; z: l1 h: |
either 21-hydroxylase deficiency or 11-β hydroxylase
' r- l( z5 V6 o' G Z7 mdeficiency. Those diagnoses were excluded by find-
# b, u1 _ S& o# x& ^ing the normal level of adrenal steroids.
6 d* H W h- r4 h' b& U) R/ {The diagnosis of exogenous androgens was strongly
: d4 [1 N* j& i8 K3 Lsuspected in a follow-up visit after 4 months because
3 h& x8 U h( P+ w: R0 U) ithe physical examination revealed the complete disap-
" i0 j. W ^7 h6 ~0 u* G2 P& epearance of pubic hair, normal growth velocity, and( R3 O; U7 |# i) _/ z
decreased erections. The father admitted using a testos-
0 b+ o* J o$ f' |. c- O% xterone gel, which he concealed at first visit. He was, k, p4 G3 E: z7 C+ z9 y
using it rather frequently, twice a day. The Physicians’, g& v: p- U1 O2 _. x. F
Desk Reference, or package insert of this product, gel or
" |3 }" L2 \/ Q0 ]( Qcream, cautions about dermal testosterone transfer to( h4 N) F9 n7 _! [& T
unprotected females through direct skin exposure.
$ g7 z, A2 j8 OSerum testosterone level was found to be 2 times the
% M9 ~. d, [; ? x- g; z- f- Xbaseline value in those females who were exposed to( A# _8 Q3 Q& c4 S. ?& X
even 15 minutes of direct skin contact with their male' N' q( g" |' t$ s" I
partners.6 However, when a shirt covered the applica- g, o1 w1 @4 V* k% j4 H, D' f
tion site, this testosterone transfer was prevented.
& G6 I, T+ ~6 C: U# ]4 e& aOur patient’s testosterone level was 60 ng/mL,
6 S5 e$ }" k! x/ s' W- y7 r, Zwhich was clearly high. Some studies suggest that0 s+ j8 y2 k- i0 E- r
dermal conversion of testosterone to dihydrotestos-
' j2 j9 i3 b0 ^3 ]/ B/ jterone, which is a more potent metabolite, is more3 W' {7 K) z' [: T
active in young children exposed to testosterone
- E1 T- k0 q' F5 aexogenously7; however, we did not measure a dihy-+ e" w6 e/ L- @7 k. Z" A6 ]
drotestosterone level in our patient. In addition to* O* S& [! o' _' g9 @
virilization, exposure to exogenous testosterone in: W* H; q' O1 ]0 R5 F$ y: Z. \
children results in an increase in growth velocity and$ z* ]) n" w) p! \
advanced bone age, as seen in our patient.1 b6 h0 T% p0 m
The long-term effect of androgen exposure during
5 w& d: X# a7 {+ ` h9 cearly childhood on pubertal development and final/ W# i5 s, z5 G% ^& Q) U, w
adult height are not fully known and always remain
$ Z& ?9 y# e& X, i/ k: Ha concern. Children treated with short-term testos-
4 w/ L+ o! k$ V: g8 A7 zterone injection or topical androgen may exhibit some
" G; Q1 F+ c( |/ M+ q* i6 Sacceleration of the skeletal maturation; however, after; U$ K/ w0 ~% o+ f2 Q+ ?3 h
cessation of treatment, the rate of bone maturation
0 T: C4 [- L) |& ydecelerates and gradually returns to normal.8,96 T. }% x% ?, B7 P4 |5 \
There are conflicting reports and controversy
* \8 T ]- I* s6 k: |9 lover the effect of early androgen exposure on adult
" |( [( H# w; P4 |" w6 bpenile length.10,11 Some reports suggest subnormal2 {5 ]" m9 j6 A+ w! t
adult penile length, apparently because of downreg-" L% p) j$ u1 [- J {) ]
ulation of androgen receptor number.10,12 However,+ B* _4 T; e7 `# w8 |% j5 Q
Sutherland et al13 did not find a correlation between
7 c7 _3 G( s9 ychildhood testosterone exposure and reduced adult
7 s2 ?9 ?+ o, ?* ^' F: Epenile length in clinical studies.5 M7 J. `8 A9 `
Nonetheless, we do not believe our patient is* X' k& R& Q2 a, F T2 J1 V- o
going to experience any of the untoward effects from
% b: p$ j. J' t' L+ L' P1 ~testosterone exposure as mentioned earlier because
+ ?9 [5 }. A. X' zthe exposure was not for a prolonged period of time.- R: \( U' P; P: p* e
Although the bone age was advanced at the time of+ ~ T1 l7 x j9 o0 V. u( a- u
diagnosis, the child had a normal growth velocity at
; ^7 l! O) U- |# F8 t5 ythe follow-up visit. It is hoped that his final adult
' ^/ @( b- i7 F$ @% a4 N, `height will not be affected.$ I Z- h9 M; d9 Q9 w
Although rarely reported, the widespread avail-7 v# H, V7 V6 p0 D
ability of androgen products in our society may
6 h2 @; Y J; t( Dindeed cause more virilization in male or female
$ H0 q' X4 y$ a4 t# d; nchildren than one would realize. Exposure to andro-# Z4 C, K+ _8 o
gen products must be considered and specific ques-
8 _9 i1 o" ^% z$ u8 ?0 c. {1 ztioning about the use of a testosterone product or
3 k; Z2 w0 O$ [$ L- Ogel should be asked of the family members during8 e* v3 k C9 y+ f
the evaluation of any children who present with vir-5 C4 w. _' @9 S: a# ]. e
ilization or peripheral precocious puberty. The diag-/ E9 o1 T) j2 h$ R. A' I6 @
nosis can be established by just a few tests and by/ `0 e7 k& {, g2 e" s# z
appropriate history. The inability to obtain such a! s7 S8 G" ?% W! U) x
history, or failure to ask the specific questions, may
f0 C, y2 g2 n' X- e; Xresult in extensive, unnecessary, and expensive6 s9 M& |# L0 I5 n2 q
investigation. The primary care physician should be
" c- ~+ A6 F9 ?: }aware of this fact, because most of these children
: M5 D7 _. `: K& G$ K, ]5 ymay initially present in their practice. The Physicians’1 I) V+ M' K* `0 g/ w! e' @0 y3 t$ D
Desk Reference and package insert should also put a
7 n' n' l8 D8 c( [. A8 A3 cwarning about the virilizing effect on a male or
# c4 T2 Q$ ]3 Y1 f% k% G: R1 Q# ffemale child who might come in contact with some-: e# x- V, N/ |' h. ?( N
one using any of these products.
( Q! M' r! D0 l! |! l2 c$ h7 E; f/ [References
; G& w% I5 J1 v; ]$ [1. Styne DM. The testes: disorder of sexual differentiation
4 X# d, K1 C$ k$ O0 ]# {and puberty in the male. In: Sperling MA, ed. Pediatric4 q& E6 [( h- V9 C% Y0 j; |
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
5 `, T* `. `) m$ W2 U( H2002: 565-628.) |# ~6 `3 z- ]
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious) M. p% { t' U/ t
puberty in children with tumours of the suprasellar pineal
/ x) K5 `$ j- Q* {& l, V; Y* Uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 |; H) p+ A: F/ r6 N2 j
Topical Testosterone Exposure / Bhowmick et al 543
: n [( [4 f" w5 j9 s8 nareas: organic central precocious puberty. Acta Paediatr.
8 F& r3 \0 ]2 F9 o7 Q5 `- e+ A- r+ A2001;90:751-756.
( c+ S, ] |1 N G3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
. Y D+ o) U" ^# JPediatric Endocrinology. 4th ed. New York, NY: Marcel
% F6 j2 N5 F. k% a: w! K% p" tDekker Inc; 2003:211-238.* r f6 R3 q5 j( O& L
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
' W% K+ Z- e& ^5 B7 m7 }development in a two-year-old boy induced by topical7 e) J' M4 R( y4 ~& x. p3 @+ |
exposure to testosterone. Pediatrics. 1999;104:e23.: s' c* \$ t5 a1 \3 C
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
1 v$ h; _* i7 o2 \4 F4 W" WSkeletal Development of the Hand and Wrist. 2nd ed." Z+ Q" E9 n! b
Stanford, CA: Stanford University Press; 1959.; ~' Y1 I$ | w. ^3 Q) J) A2 r
6. Physicians’ Desk Reference. Androgel 1% testosterone,
3 c/ q& h G1 ^$ T1 R% y$ eUnimed Pharmaceutical Inc. Montvale, NJ: Medical
" }3 A \5 N& k3 ?. m6 {2 xEconomics Company, Inc; 2004:3239-3241.
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