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is a significant concern for physicians. Central
4 E+ P" M! J) n( [0 Bprecocious puberty (CPP), which is mediated0 [7 {5 V& o1 W7 A' r8 g0 f5 {
through the hypothalamic pituitary gonadal axis, has f& y4 G- P& y; g& n3 H% ^. e# v7 t
a higher incidence of organic central nervous system, R6 M4 h$ y* v
lesions in boys.1,2 Virilization in boys, as manifested
8 I: r# ^1 H) G4 D4 iby enlargement of the penis, development of pubic; e, N% l2 B6 N3 B
hair, and facial acne without enlargement of testi-: B5 ~0 J4 a3 D' H" P
cles, suggests peripheral or pseudopuberty.1-3 We0 z6 r5 C* M) ~7 O O; S: L
report a 16-month-old boy who presented with the
8 K$ T8 N1 [' ~enlargement of the phallus and pubic hair develop-
$ c- s1 t3 O2 n1 v6 {ment without testicular enlargement, which was due
+ h. p/ k2 j0 T0 u: r; W1 X1 @to the unintentional exposure to androgen gel used by& Y' Y# K/ Y! G( _. n
the father. The family initially concealed this infor-. f4 i5 E W6 V- w" r
mation, resulting in an extensive work-up for this! w' k% `. z+ l/ }: x
child. Given the widespread and easy availability of
$ Z; w' ^9 R8 J) M: k: q/ Atestosterone gel and cream, we believe this is proba-/ K6 Z9 T8 u2 \4 w: N, j/ {7 g
bly more common than the rare case report in the L) }2 t) O5 o( C. F6 Y% j% X% v
literature.4$ T5 C( y1 g7 L0 s* ^$ {
Patient Report P1 c- ?# P; X/ H9 O6 z* D
A 16-month-old white child was referred to the
/ T, u( x. f' x( V1 \# @) c5 U+ A6 }endocrine clinic by his pediatrician with the concern
4 L& B) O, k9 Q7 I. qof early sexual development. His mother noticed
6 m3 G; j! p1 ?* z0 slight colored pubic hair development when he was( b- Q9 f' \+ `9 @
From the 1Division of Pediatric Endocrinology, 2University of
3 ]- Z* u( t9 D9 [. {# U) f& uSouth Alabama Medical Center, Mobile, Alabama.
; {0 a7 d) k5 z' n% Z0 g' {4 U& \/ `Address correspondence to: Samar K. Bhowmick, MD, FACE,
3 f( ]/ X7 I- o. @/ S$ h2 yProfessor of Pediatrics, University of South Alabama, College of/ V9 H% C8 M4 o/ m
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
0 e {; L- y# `! \3 ~) h7 oe-mail: [email protected]./ ~+ x* U& G: b6 s6 R8 ~
about 6 to 7 months old, which progressively became
8 B# S& a* R- F4 I" Sdarker. She was also concerned about the enlarge-8 Q' v$ c- r$ Q
ment of his penis and frequent erections. The child
, W# O' D; U0 Zwas the product of a full-term normal delivery, with* C6 y2 ?7 t3 R5 Q* v. H
a birth weight of 7 lb 14 oz, and birth length of% B# o- r# h( |8 ^
20 inches. He was breast-fed throughout the first year
; ~" I2 u0 o' A" Y+ Rof life and was still receiving breast milk along with
# ]% t! y$ M% l1 t+ T5 \$ Qsolid food. He had no hospitalizations or surgery,- d( f7 c/ }7 M) N
and his psychosocial and psychomotor development
: z2 g: J. r( d) S; w# awas age appropriate.
9 _ _4 a" B# H" I# Y; j$ vThe family history was remarkable for the father,1 R! a- P. L7 j
who was diagnosed with hypothyroidism at age 16,
% @6 R$ B8 X2 X* H! U, jwhich was treated with thyroxine. The father’s
7 |7 Z0 K( m7 D& E% }height was 6 feet, and he went through a somewhat
$ Z2 d$ M; S$ Q! a4 o- u8 fearly puberty and had stopped growing by age 14.
- b4 }7 b5 X8 |7 }$ VThe father denied taking any other medication. The3 k! ]6 m" i- N4 V# A
child’s mother was in good health. Her menarche
) S; y( L3 h3 Bwas at 11 years of age, and her height was at 5 feet
/ \; D; T! x# R/ w/ W7 o- H5 inches. There was no other family history of pre-
" K$ F! _) B' V! u) c6 _+ |cocious sexual development in the first-degree rela-
. J6 `5 A! u4 Z. G/ ^5 Ttives. There were no siblings., V4 E5 @( Y* A4 K8 q
Physical Examination% I3 K8 y8 S( O5 @9 b* B5 _' S
The physical examination revealed a very active,1 f( h. M: i7 n% E
playful, and healthy boy. The vital signs documented
# Y) `( }% M' ^% G: y' W% U7 f, Ba blood pressure of 85/50 mm Hg, his length was. J7 V7 g& n' L: e. _
90 cm (>97th percentile), and his weight was 14.4 kg
/ {! f o% ^0 @; u/ _(also >97th percentile). The observed yearly growth3 ]0 H6 `5 u: F# K ^9 L1 p
velocity was 30 cm (12 inches). The examination of0 W q% [$ m8 }# p) }7 E
the neck revealed no thyroid enlargement.
, q0 v2 ~. t, U8 {* b4 U: l7 N' qThe genitourinary examination was remarkable for5 k% b" k8 H+ H$ m
enlargement of the penis, with a stretched length of
% D0 h. o- }$ P; A8 cm and a width of 2 cm. The glans penis was very well- q. a! B4 I6 n8 g; m4 X9 p
developed. The pubic hair was Tanner II, mostly around8 I5 d, I6 @; U# u+ l1 ^
540% E7 |. B. ~$ v3 a; i
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
9 c) E9 o1 Z* s* O$ {: v6 m5 _the base of the phallus and was dark and curled. The
7 b3 |- l$ `) j+ z0 Ztesticular volume was prepubertal at 2 mL each.
- y/ \. s/ j5 T2 M9 O" S4 w# f; w# w: j3 AThe skin was moist and smooth and somewhat
- q7 k' j- e# i: g3 i# ]oily. No axillary hair was noted. There were no
$ m- j, y5 Y, n; C0 jabnormal skin pigmentations or café-au-lait spots.! ?- u) e3 ~2 O# h! m# [
Neurologic evaluation showed deep tendon reflex 2+
& J; n) V v: m: ebilateral and symmetrical. There was no suggestion; i. s; X B/ Z, H6 v7 {
of papilledema.
6 g5 g& S8 a+ D/ l) \Laboratory Evaluation& x7 `! t) Q' m h& [7 D2 A2 Z
The bone age was consistent with 28 months by. g* s6 [( _* ^9 L: X, }
using the standard of Greulich and Pyle at a chrono-
+ t, @, p$ g6 O0 R( f9 g# Mlogic age of 16 months (advanced).5 Chromosomal8 T& i0 }$ S; ^) m
karyotype was 46XY. The thyroid function test. ]5 Y( L& I5 L; f8 v+ E' j& A
showed a free T4 of 1.69 ng/dL, and thyroid stimu-" k+ P+ R" V6 f! v9 q9 x8 w8 |5 J
lating hormone level was 1.3 µIU/mL (both normal).
( S3 m- S5 L: \The concentrations of serum electrolytes, blood4 E& y" H6 A" x6 N+ C
urea nitrogen, creatinine, and calcium all were
' I& G C3 V. p+ N9 u R2 s0 Vwithin normal range for his age. The concentration6 ?* J: y- k% X
of serum 17-hydroxyprogesterone was 16 ng/dL
: ~; L0 R4 c" T) `+ w! a(normal, 3 to 90 ng/dL), androstenedione was 20
8 n) G2 p- {2 f3 S* r/ Rng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
3 F2 d/ E5 T; N9 o8 uterone was 38 ng/dL (normal, 50 to 760 ng/dL),
! N: f- j' @( V; x+ U& xdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
* O) \4 Y5 U9 `& ]3 V49ng/dL), 11-desoxycortisol (specific compound S)
1 o2 z4 J0 F( t* M# j a4 awas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
5 W, G. L. s+ i$ f) R# B3 b; f) Ntisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
6 T/ o! X2 t# [7 y3 O; @testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
: t2 @- M' W/ }8 z, a+ hand β-human chorionic gonadotropin was less than1 y4 l( g3 I: j( m! p9 k
5 mIU/mL (normal <5 mIU/mL). Serum follicular" R7 D8 l; V1 R$ L% H+ n
stimulating hormone and leuteinizing hormone* K$ E0 F$ m+ D/ J6 p( o; s
concentrations were less than 0.05 mIU/mL
8 s) ?- @* e% s% {(prepubertal).9 Z4 ^6 d) [# m9 b, _# S3 L+ `
The parents were notified about the laboratory
6 f B" H) x ]: b* bresults and were informed that all of the tests were3 Q; s" p! p1 D# G/ i
normal except the testosterone level was high. The
% k1 X' K$ I4 V" ^$ H% R5 gfollow-up visit was arranged within a few weeks to, z8 S* Y+ U* \; s" k
obtain testicular and abdominal sonograms; how-; ?& R4 x; |5 W# B" V) B2 P2 w
ever, the family did not return for 4 months.
7 e6 N1 ?0 \: a1 X- _0 GPhysical examination at this time revealed that the
0 _: B, @" x; G. x! Bchild had grown 2.5 cm in 4 months and had gained j% A: u5 W. f7 l8 v" f: \1 D6 |. _
2 kg of weight. Physical examination remained
% f# O7 Z* i+ Y3 u! {3 uunchanged. Surprisingly, the pubic hair almost com-* y0 s! D1 ^/ M3 C* g: `
pletely disappeared except for a few vellous hairs at
' F' L& h8 A$ p! othe base of the phallus. Testicular volume was still 2 S& m. w5 P7 N: B5 q4 t* N. y4 G
mL, and the size of the penis remained unchanged.( l2 g5 w& U& o" M7 w
The mother also said that the boy was no longer hav-
+ d6 Q# @5 I7 ling frequent erections.: o3 X6 C6 z; c3 E7 p
Both parents were again questioned about use of6 }8 \) a, r; l* l
any ointment/creams that they may have applied to* B( N+ Y/ C4 y9 P$ M* v
the child’s skin. This time the father admitted the
. W# F+ v' E" Z DTopical Testosterone Exposure / Bhowmick et al 541
1 x9 ^/ W- M9 ^6 ?use of testosterone gel twice daily that he was apply-5 v6 O0 b+ H% x# ]. L
ing over his own shoulders, chest, and back area for K) u; O) v. A6 g# |0 O$ j
a year. The father also revealed he was embarrassed; ~( Q% K' q* P
to disclose that he was using a testosterone gel pre-
7 q2 Z" F; j8 escribed by his family physician for decreased libido9 S9 s6 Q9 A3 ]) I) T% w
secondary to depression.) ]/ j2 R9 e! h- Y8 ]
The child slept in the same bed with parents.0 Z( `& z9 B" d3 i3 L2 x4 |
The father would hug the baby and hold him on his
; x9 o9 n4 I% qchest for a considerable period of time, causing sig-
$ h: z) H' ~8 L5 }4 C3 wnificant bare skin contact between baby and father.
, b$ R5 J# v) ]The father also admitted that after the phone call,
h2 T6 e6 C0 q# mwhen he learned the testosterone level in the baby
9 t' K9 B4 t" t, n5 b0 Jwas high, he then read the product information
9 b# n; k0 N( M5 I( V: _3 w Bpacket and concluded that it was most likely the rea-
, k# h. k; H+ K& Fson for the child’s virilization. At that time, they9 r, E4 ^4 u; {. E7 o
decided to put the baby in a separate bed, and the
9 R$ K( z, h' Hfather was not hugging him with bare skin and had* O0 V! l& A/ l, ~2 U
been using protective clothing. A repeat testosterone
0 L1 F/ e$ Z8 @: m0 G" Htest was ordered, but the family did not go to the
: [: m4 R8 f8 j S: wlaboratory to obtain the test.
, x4 J: }4 d8 [/ h+ tDiscussion+ o3 x8 L" l2 |$ R& i
Precocious puberty in boys is defined as secondary6 a- C$ h( Z( I9 I
sexual development before 9 years of age.1,4
; F- _$ \* _- p! L/ H9 P$ S: kPrecocious puberty is termed as central (true) when
' ^. u* w4 W, z( Xit is caused by the premature activation of hypo-
4 `; f: c# M5 c0 vthalamic pituitary gonadal axis. CPP is more com-, v: `+ I7 G; J1 g6 _6 y* u5 a
mon in girls than in boys.1,3 Most boys with CPP, q1 u& j$ T3 K9 q0 B7 u0 `# i
may have a central nervous system lesion that is
1 I7 g2 h3 _. s a5 \& [responsible for the early activation of the hypothal-5 ]/ l" ? i2 ]* f0 _7 s' Q
amic pituitary gonadal axis.1-3 Thus, greater empha-
' g4 ]) O7 u' N/ o. a/ ^" q' wsis has been given to neuroradiologic imaging in
" q* E" n3 v2 Q6 G2 t% Hboys with precocious puberty. In addition to viril-
, U! i& n7 H! pization, the clinical hallmark of CPP is the symmet-0 v/ S; j" [% F* L6 o* \
rical testicular growth secondary to stimulation by o0 P9 C" u7 U' ^! `8 s! S
gonadotropins.1,3
- v3 G. I1 I- \$ ]' ~/ `/ gGonadotropin-independent peripheral preco-- A! {6 j1 o6 }/ B- W0 O# F' Y k
cious puberty in boys also results from inappropriate2 P1 _9 |% h: B& h# s: ]
androgenic stimulation from either endogenous or
( Z" @7 ?: w/ T- v4 s! uexogenous sources, nonpituitary gonadotropin stim-
1 M H1 Z; v2 ~; C1 Nulation, and rare activating mutations.3 Virilizing c7 ]. T, R' ~2 s5 F! f
congenital adrenal hyperplasia producing excessive
/ I4 n; R# M5 o8 Q- p- B' xadrenal androgens is a common cause of precocious) y+ `4 p+ A" D2 w
puberty in boys.3,4
]3 _5 X, t v7 G% T- ]The most common form of congenital adrenal9 k& i( }9 Q+ P- W: H% F2 W/ c% {
hyperplasia is the 21-hydroxylase enzyme deficiency.2 s+ T* c" c2 w) K
The 11-β hydroxylase deficiency may also result in& A% H, b2 J) d/ T1 r5 o) m# _
excessive adrenal androgen production, and rarely,
* y7 `& n% _' j1 Tan adrenal tumor may also cause adrenal androgen$ I7 U3 i6 {' F
excess.1,3
9 r$ c. x0 k% ^7 F c" O( _) V8 s+ Gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 g9 e% @% c i# A/ E542 Clinical Pediatrics / Vol. 46, No. 6, July 2007 I0 f5 B! f# d ]0 J9 G; y: \
A unique entity of male-limited gonadotropin-2 w% Y" X0 f* J ?* r/ G. y: ]
independent precocious puberty, which is also known
4 _/ T7 Y% P' ]2 p6 R* zas testotoxicosis, may cause precocious puberty at a
, F+ P! g& _+ f) }8 s; J {0 e% F! Uvery young age. The physical findings in these boys" |5 l7 I1 i2 @" ]7 S
with this disorder are full pubertal development,' K# U$ G/ `2 Y. l
including bilateral testicular growth, similar to boys5 _) K* \2 J& |1 }7 P
with CPP. The gonadotropin levels in this disorder
9 N; v5 ^9 m- M% V- c9 [3 J! p. _* e8 ware suppressed to prepubertal levels and do not show
, c" J6 e5 e$ v8 Y" j; Q. Apubertal response of gonadotropin after gonadotropin-
: ^* a& |7 a1 i& J/ m) E$ ?2 Jreleasing hormone stimulation. This is a sex-linked
* B# t; i8 R' O2 iautosomal dominant disorder that affects only
. |3 K3 t/ K F( \. M4 r, emales; therefore, other male members of the family
# h# W" z; g9 w, gmay have similar precocious puberty.3 _/ {& o& k; s; p% x o& ^
In our patient, physical examination was incon-
6 q; Z* f Z+ { u. m$ Z0 Isistent with true precocious puberty since his testi-
) U/ R& d# }* C+ Gcles were prepubertal in size. However, testotoxicosis( B% s& ]' a+ w7 n! N* w* p
was in the differential diagnosis because his father
2 m2 v& B! G8 O+ J5 m. g) `. Cstarted puberty somewhat early, and occasionally,
3 g) z* g# Y% A( j8 V) y9 W2 j- Ptesticular enlargement is not that evident in the& o0 U& r8 f0 O* ^% P/ H
beginning of this process.1 In the absence of a neg-
2 C7 ^5 z w' q# [, E; pative initial history of androgen exposure, our
5 k6 p6 U! }1 ^: u8 Z* |& b5 Abiggest concern was virilizing adrenal hyperplasia,2 C" c9 q+ V; c$ n
either 21-hydroxylase deficiency or 11-β hydroxylase
! b3 z* N+ X" w0 Udeficiency. Those diagnoses were excluded by find-7 p) }5 N. @# @$ R/ z& V6 I
ing the normal level of adrenal steroids.
* L" U j0 \9 V6 F, Y: PThe diagnosis of exogenous androgens was strongly
9 r, O: R- C+ I+ ~9 m1 jsuspected in a follow-up visit after 4 months because
2 w6 h g0 R$ p; d4 nthe physical examination revealed the complete disap-
) [% h: l8 V. X4 m: E9 `. epearance of pubic hair, normal growth velocity, and
$ O+ [, t' I( Pdecreased erections. The father admitted using a testos-0 g, X, v$ B3 a* B
terone gel, which he concealed at first visit. He was1 f$ C, n. |3 Q0 X
using it rather frequently, twice a day. The Physicians’
& I9 c5 S. k/ LDesk Reference, or package insert of this product, gel or
- H# U, } \& p' t9 fcream, cautions about dermal testosterone transfer to( r E% V, |% a' L
unprotected females through direct skin exposure.& K8 k4 J: W% |7 t
Serum testosterone level was found to be 2 times the! y" k; Y4 u9 K
baseline value in those females who were exposed to% Q* \9 R: t) y$ _
even 15 minutes of direct skin contact with their male
x0 h9 n& Z2 t& Kpartners.6 However, when a shirt covered the applica-
5 d6 v- v3 _9 w/ T! rtion site, this testosterone transfer was prevented.
" e4 ?/ ?6 x( G+ }Our patient’s testosterone level was 60 ng/mL,
1 l' f" p2 N1 Lwhich was clearly high. Some studies suggest that
8 r& c5 {- M8 g5 l: K9 Y8 ddermal conversion of testosterone to dihydrotestos-" Q5 B; T y% {; Q+ _
terone, which is a more potent metabolite, is more
. Y6 O e, u4 u K1 \" Bactive in young children exposed to testosterone
5 u* y- j5 C% | S' V& Uexogenously7; however, we did not measure a dihy- E# F, ^# f3 E- V3 R- N5 Y
drotestosterone level in our patient. In addition to# ~0 Q$ ?9 r+ x" w
virilization, exposure to exogenous testosterone in
- P* W/ ~/ I$ Z* H! Mchildren results in an increase in growth velocity and
$ y! q9 N& x+ ^: u3 }( n9 Oadvanced bone age, as seen in our patient.
- _. e& O( t/ ZThe long-term effect of androgen exposure during0 U' ?- r, M( G# O
early childhood on pubertal development and final
0 m+ g. Q/ h- p+ h5 ]1 ~adult height are not fully known and always remain, i& B: W- C2 h0 \
a concern. Children treated with short-term testos-
9 X% l8 c2 s+ m" B% {. }terone injection or topical androgen may exhibit some
$ D- i) C- E- u/ Q" }acceleration of the skeletal maturation; however, after3 \, L7 v6 C, x5 f5 P4 s# P H
cessation of treatment, the rate of bone maturation0 i2 H3 @9 y; `% a4 `& i! n
decelerates and gradually returns to normal.8,9$ M# I' R8 S+ c& y" S
There are conflicting reports and controversy2 n! F3 ?6 h6 M$ b1 P1 W1 y
over the effect of early androgen exposure on adult; _( [! [ k4 O0 v# E* y
penile length.10,11 Some reports suggest subnormal# K, `1 B$ |: H! x Z
adult penile length, apparently because of downreg-
2 ~; P9 G6 p" {+ T+ f) e3 Mulation of androgen receptor number.10,12 However,
! P6 j' l |4 b& c/ \Sutherland et al13 did not find a correlation between. T/ H9 H) q! W2 Q- |
childhood testosterone exposure and reduced adult
& S; B- B/ Q. q. s" R, \" @, D6 |penile length in clinical studies.
]$ w- Q" v( q: H. L" q& NNonetheless, we do not believe our patient is
0 u; I( U, s! o/ M/ o, p) ?" Jgoing to experience any of the untoward effects from
( Q2 W7 m/ Z/ Q- g" j, Ytestosterone exposure as mentioned earlier because6 w2 w) {* T% I' Y/ [- F% ~
the exposure was not for a prolonged period of time.. T' @0 R% n. v: ]
Although the bone age was advanced at the time of( O2 W6 ~6 X! P* ^2 m
diagnosis, the child had a normal growth velocity at
/ ?# a+ ~) f; D* Z- w5 n$ o1 Uthe follow-up visit. It is hoped that his final adult1 t! P; V, `! F# r- P P
height will not be affected.
; a- A2 y4 a4 K$ f8 BAlthough rarely reported, the widespread avail-
* o; i+ ]& @- u: tability of androgen products in our society may
) t0 N5 V/ }0 u0 D4 ^indeed cause more virilization in male or female
" c' H" A+ _" O7 [% echildren than one would realize. Exposure to andro-; _. C5 B! W, Y* U: e7 N3 }
gen products must be considered and specific ques-
* L6 A2 r# e+ l" H$ J. _' W' T6 Ctioning about the use of a testosterone product or
' R& W- K2 r; z- ^6 d3 ^ _* Ugel should be asked of the family members during. N) V! i5 h( a+ G" I' {& F+ K
the evaluation of any children who present with vir-
* ~5 ?, `" n9 {ilization or peripheral precocious puberty. The diag-# e+ |( B- v2 T' C9 J# `, V% ?5 w. l# g
nosis can be established by just a few tests and by
, D" L7 T1 O: o+ l- Yappropriate history. The inability to obtain such a/ p, H& K! L0 P B: x8 z
history, or failure to ask the specific questions, may5 g2 ~, S: O5 x, g
result in extensive, unnecessary, and expensive
6 X* s1 A1 [- Z& T9 minvestigation. The primary care physician should be$ E! n; {) P) y( u- }; R" z2 p* r
aware of this fact, because most of these children
% E' m$ l( ~4 x8 H3 v) Gmay initially present in their practice. The Physicians’% F7 u/ h! i( t3 q) x/ Z* [
Desk Reference and package insert should also put a
) |! J0 Y9 p x) F- Q: p- dwarning about the virilizing effect on a male or5 g1 K1 ^3 x; }) T/ h# u# z5 R, g7 \5 i
female child who might come in contact with some-% ?' A/ @7 y( R0 W
one using any of these products.5 m% C9 _) Z( }( A. N
References2 P+ C/ {, a( q$ a m b
1. Styne DM. The testes: disorder of sexual differentiation) b. v2 g0 p& K) M, _7 y
and puberty in the male. In: Sperling MA, ed. Pediatric
/ v" p( g1 I0 [% O! T) O, A9 U# gEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;7 h& V0 I2 l; |' Q
2002: 565-628.+ g& r" d/ @( @3 O# |5 j( u
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious4 w' ]; e9 n! y _; O
puberty in children with tumours of the suprasellar pineal. a; v( Y+ S! I% S( W- N" ~
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Topical Testosterone Exposure / Bhowmick et al 543
" N; H( i4 o# J. z; A4 Rareas: organic central precocious puberty. Acta Paediatr.
- }; e7 s6 |3 h( p5 S& K2001;90:751-756.& p) e1 |! R# \6 d& U$ T) A
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
+ i( w& J. n' P' D j$ cPediatric Endocrinology. 4th ed. New York, NY: Marcel
; H, ~- y( E& D7 uDekker Inc; 2003:211-238.
' }, G3 A1 O, t$ B, T) @6 m1 n/ m; a4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
7 |/ C) C0 G; D9 B( C' }6 Rdevelopment in a two-year-old boy induced by topical
, c8 M& W, Q- Y7 c s& xexposure to testosterone. Pediatrics. 1999;104:e23.7 `- w! P5 w& e2 T6 k
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
# v+ f2 C5 U5 Z: n/ z0 @1 sSkeletal Development of the Hand and Wrist. 2nd ed.( J% i2 A3 Z% Q
Stanford, CA: Stanford University Press; 1959.
: b1 ^& g3 u( k; Q+ G: ~6. Physicians’ Desk Reference. Androgel 1% testosterone,5 i9 Y. Q4 R- V& x' _9 o/ R
Unimed Pharmaceutical Inc. Montvale, NJ: Medical8 p0 o/ }- h; ]9 T& z6 ~" g
Economics Company, Inc; 2004:3239-3241.+ ]) F9 _, x: t. B6 z
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