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is a significant concern for physicians. Central
) w+ l g# f) O/ Nprecocious puberty (CPP), which is mediated" C+ Y7 @2 f' W c1 z/ C
through the hypothalamic pituitary gonadal axis, has
& N0 w/ V; j( O8 g+ Ma higher incidence of organic central nervous system
* p( E; U1 `. G0 N. }. {* ?6 Y! Llesions in boys.1,2 Virilization in boys, as manifested
& ?& E+ T2 x# v) D+ a2 Nby enlargement of the penis, development of pubic% b9 W1 T! ~ E4 C) g( S: m x
hair, and facial acne without enlargement of testi-3 ?( M9 U5 _0 n' h* w3 Q
cles, suggests peripheral or pseudopuberty.1-3 We/ C1 A6 g- D' d m! i( E4 l
report a 16-month-old boy who presented with the' Z+ p3 }2 x( ^" I1 I
enlargement of the phallus and pubic hair develop-8 A3 e# M& a5 P: ^& d
ment without testicular enlargement, which was due
$ U; u, ?* \, F* F2 fto the unintentional exposure to androgen gel used by% w6 x7 J- Y7 I9 o% @
the father. The family initially concealed this infor-
- Z6 }; I* N( K: Vmation, resulting in an extensive work-up for this9 p; D! H# v* z! e* E
child. Given the widespread and easy availability of- x% I( J: @' a' ~/ N0 N8 L4 I. N9 r
testosterone gel and cream, we believe this is proba-
! S; d. @. |/ i6 f9 Pbly more common than the rare case report in the
' r1 n) @4 f8 @' W6 Eliterature.4
; T" F" m" t" i5 }& g3 y `9 EPatient Report
' x0 h0 r/ }- B1 q" ]% eA 16-month-old white child was referred to the
* z3 P7 U" _. e2 Y8 }endocrine clinic by his pediatrician with the concern
: C4 d9 w- r( s; n8 Y& Cof early sexual development. His mother noticed
% Y+ }! G" @+ e7 F, Z5 [. G; slight colored pubic hair development when he was
4 Z- H& r# ?1 S3 L. C# mFrom the 1Division of Pediatric Endocrinology, 2University of9 C4 o% x& y1 m, U; n
South Alabama Medical Center, Mobile, Alabama.
( i# z& f9 ?' V: q. l. H) Y" t) n. CAddress correspondence to: Samar K. Bhowmick, MD, FACE,
% T5 `* `3 W6 M, O! J+ ]Professor of Pediatrics, University of South Alabama, College of
) U L; ^% W7 |: W5 h$ {Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
* i( j# K3 O( S T* Q6 C2 j7 Fe-mail: [email protected].
2 C! ^7 d4 G& _* Eabout 6 to 7 months old, which progressively became
- d2 [. H' M+ X5 B0 mdarker. She was also concerned about the enlarge- K% Z- {5 J$ Y7 |( r+ v
ment of his penis and frequent erections. The child C7 H: H& \' j4 A# q2 R4 _# b
was the product of a full-term normal delivery, with" M$ C7 @; ^& ~; d1 W3 i r1 F3 U
a birth weight of 7 lb 14 oz, and birth length of7 B1 y" h0 p, A. \1 K2 h' Y
20 inches. He was breast-fed throughout the first year
( T) c4 V4 E) R H ]+ q/ Bof life and was still receiving breast milk along with0 }" K# z; X P( k- q8 Z3 ~
solid food. He had no hospitalizations or surgery,# |5 P3 Y" [' n) w. |5 w! `
and his psychosocial and psychomotor development
' M9 o; U i" X$ s8 F. Iwas age appropriate.. a9 I; w; `( E; m0 t2 q* X
The family history was remarkable for the father,
( R+ {5 H% K; l; b4 e- Cwho was diagnosed with hypothyroidism at age 16,3 W. F/ |* p" L% D; M
which was treated with thyroxine. The father’s
6 E2 V* V# R4 G# Z: W Z3 o4 Dheight was 6 feet, and he went through a somewhat
6 `# y5 p1 l% Pearly puberty and had stopped growing by age 14.
& c% \$ `9 B* I; H: x0 bThe father denied taking any other medication. The2 L" |9 \; d" d% U5 O# p. U8 U1 V. D
child’s mother was in good health. Her menarche( t0 c& k1 ]! ^& U( C
was at 11 years of age, and her height was at 5 feet
/ N9 b: m: m" A2 b5 inches. There was no other family history of pre- H. m# b% T: h$ Z
cocious sexual development in the first-degree rela-
0 Y3 P; J& E: Y: P6 N) l0 Vtives. There were no siblings.8 i( {. u: W& Z5 Z p3 A: S0 ]
Physical Examination1 r: p2 f+ `% t% R) m' E' t: a
The physical examination revealed a very active,
# ?0 E/ u& x- }- M6 }( qplayful, and healthy boy. The vital signs documented
w$ G. ] E6 va blood pressure of 85/50 mm Hg, his length was
# h; N# a# B( ?( `+ f' n90 cm (>97th percentile), and his weight was 14.4 kg3 g8 X8 R! z$ s
(also >97th percentile). The observed yearly growth
+ [/ z# V* k+ I. [ g: Rvelocity was 30 cm (12 inches). The examination of: W# ^4 [% @4 D/ }7 X7 L. c
the neck revealed no thyroid enlargement.
; g+ O6 r0 M4 V1 ~4 ]The genitourinary examination was remarkable for& z, [; w" F; i8 E" Y, N
enlargement of the penis, with a stretched length of
. Q, a8 H+ n) g$ F) p% e9 q; n* k8 cm and a width of 2 cm. The glans penis was very well
0 \; {8 f5 k3 Z. P2 r: Udeveloped. The pubic hair was Tanner II, mostly around1 S. h# @, c( l9 F
540
" }3 x$ [0 X' K& ]2 d" X! Jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 Y$ p( y' X6 s9 p( r+ N3 l- d
the base of the phallus and was dark and curled. The3 P- I. r+ s: I( a8 v& w3 \* a
testicular volume was prepubertal at 2 mL each.5 e9 m+ ?0 K- Q' d
The skin was moist and smooth and somewhat* R( Z2 J; S3 K& P+ t
oily. No axillary hair was noted. There were no. d; R: Z5 C( H- z8 K- \6 V( G
abnormal skin pigmentations or café-au-lait spots.
0 r$ C- _% C% J' W3 C6 p! V/ dNeurologic evaluation showed deep tendon reflex 2++ V& ]& g2 l7 q3 N/ `
bilateral and symmetrical. There was no suggestion
" s" C& u# s3 [of papilledema.
& n. I; C/ q. Z; K! |' Q1 B. H1 FLaboratory Evaluation
+ l J, p1 i, F( F U+ O8 DThe bone age was consistent with 28 months by: ^+ q" y4 v) R S+ z' F9 N9 V! t7 U3 |
using the standard of Greulich and Pyle at a chrono-
+ l# L: J9 w; C. w; v& `logic age of 16 months (advanced).5 Chromosomal- H1 a: C! ?5 z! E, S
karyotype was 46XY. The thyroid function test5 y/ J3 O& t2 T% u( b
showed a free T4 of 1.69 ng/dL, and thyroid stimu-! G% d A8 M5 p4 d' h( a _
lating hormone level was 1.3 µIU/mL (both normal).' W H% h5 m" R! E: D a
The concentrations of serum electrolytes, blood- f# l( @$ x+ Y0 O
urea nitrogen, creatinine, and calcium all were% {0 c' w4 `9 ^ Q0 H7 ^% Y
within normal range for his age. The concentration! [! Q5 T+ G" f( Q- f) F- r
of serum 17-hydroxyprogesterone was 16 ng/dL) W# A; ?* F, t" l
(normal, 3 to 90 ng/dL), androstenedione was 20" f( V7 t6 D* F7 I4 L
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
% w. Q, P: n% {3 [5 `1 Rterone was 38 ng/dL (normal, 50 to 760 ng/dL),
* [6 A/ h, b1 t( C: v8 }desoxycorticosterone was 4.3 ng/dL (normal, 7 to
2 a3 \* u' C6 U% L& u49ng/dL), 11-desoxycortisol (specific compound S): L8 o$ H+ |) P3 t7 I4 ?
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-) Z1 q; x; s3 u+ Q- `$ a
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 ^& ?7 i8 P9 \- h' A( ^testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
% l3 D. d- n- ]! ?and β-human chorionic gonadotropin was less than
' Z4 n# S4 v* d, K3 I9 F- l5 mIU/mL (normal <5 mIU/mL). Serum follicular
# t9 ?+ t3 E6 U3 X8 S) w7 Qstimulating hormone and leuteinizing hormone
9 ~6 v' x. ]# ^" N% h9 pconcentrations were less than 0.05 mIU/mL1 v+ d# L, N1 g$ s. P3 ]0 X
(prepubertal).
1 g* u# H7 f9 n5 b% ?8 j# Y- bThe parents were notified about the laboratory
3 t4 i+ j% {2 S: k H4 k7 c& ]: Dresults and were informed that all of the tests were* }1 {7 P/ l) F
normal except the testosterone level was high. The' u8 F7 X! j( m. s3 l; e
follow-up visit was arranged within a few weeks to
! o; C+ c; L& h. |5 l. }# U1 Yobtain testicular and abdominal sonograms; how-
6 e% _2 [/ x7 Y% ]- b# Lever, the family did not return for 4 months.5 ?0 m# n9 y9 u g# a$ `0 k. x& c' k
Physical examination at this time revealed that the* G" u2 `7 h/ m
child had grown 2.5 cm in 4 months and had gained2 w% L O- C$ O+ r( J( Y! w9 [
2 kg of weight. Physical examination remained/ t8 i/ T2 B# ]
unchanged. Surprisingly, the pubic hair almost com-
5 f& X1 R( q: p8 L0 [pletely disappeared except for a few vellous hairs at
! p( d# K! D8 S+ e: Cthe base of the phallus. Testicular volume was still 23 I. c2 T1 Y4 B+ |- t
mL, and the size of the penis remained unchanged.
' K$ ^# s* }+ U+ D7 e4 q$ GThe mother also said that the boy was no longer hav-
4 J9 t1 x+ d! Eing frequent erections.
3 `. I# w# x6 RBoth parents were again questioned about use of
1 n& I7 P6 K, v" u( o. H- L3 rany ointment/creams that they may have applied to7 n- L0 `. Q( v7 D1 O" w% ?
the child’s skin. This time the father admitted the
$ }+ Y# R% z2 E. M, A# z/ q# OTopical Testosterone Exposure / Bhowmick et al 541
7 S, y `2 X7 G. I* A' N6 @" }. E$ Suse of testosterone gel twice daily that he was apply-
1 ^: _4 \) D) B; Zing over his own shoulders, chest, and back area for
: T4 v, l. R5 `* d8 {: s! D' Ma year. The father also revealed he was embarrassed: U# W5 D" s" ~. ?
to disclose that he was using a testosterone gel pre-
) a5 b: n8 p# m5 Z5 j' oscribed by his family physician for decreased libido
0 W+ G& U$ v$ N2 e. [% tsecondary to depression.5 u$ s4 K9 p3 l7 ?/ C
The child slept in the same bed with parents. Y! h( ]4 n1 X, p7 S+ |
The father would hug the baby and hold him on his
8 D0 |" E7 M, b# L4 [' cchest for a considerable period of time, causing sig-3 H; S& ^+ g0 M+ g: H- Z6 u+ ^
nificant bare skin contact between baby and father.
* ?( M/ A, V; J' t( r9 B6 _0 NThe father also admitted that after the phone call,
' U7 K2 Q6 f6 H* A2 e4 Xwhen he learned the testosterone level in the baby; ?: P+ E, d* t5 H# H; Y6 v8 |" h
was high, he then read the product information
" R) U" C3 M# F3 _packet and concluded that it was most likely the rea-3 Z: x1 v7 T* W0 L
son for the child’s virilization. At that time, they
4 X( H# e# K$ }! g" Odecided to put the baby in a separate bed, and the8 j* d1 h9 \% m. h& {
father was not hugging him with bare skin and had6 |5 e7 n3 [7 P, F7 _) d5 I( P: V
been using protective clothing. A repeat testosterone
* X' c8 D" C3 e5 Ltest was ordered, but the family did not go to the
/ I- G0 b; g( a! nlaboratory to obtain the test.' G1 U7 F! _2 C+ y+ V- o
Discussion
S) ?+ z) w4 `) j' X+ A# H6 ~Precocious puberty in boys is defined as secondary
+ Z8 e$ m& J5 G& d. d7 dsexual development before 9 years of age.1,46 C" h+ w, e% s' U; V8 M! l6 f/ f
Precocious puberty is termed as central (true) when7 d S" X. ^# E9 D6 m) [5 j
it is caused by the premature activation of hypo-
4 ^. g/ u2 L" Qthalamic pituitary gonadal axis. CPP is more com-& @$ N8 f9 J- I: O
mon in girls than in boys.1,3 Most boys with CPP4 t; F6 E2 ]8 \4 e$ A0 Y/ C; r
may have a central nervous system lesion that is
5 v8 S) K2 O, ]9 x& U- Eresponsible for the early activation of the hypothal-
* X( I0 F U/ h2 Kamic pituitary gonadal axis.1-3 Thus, greater empha-3 U4 |; J% ~/ |5 Q
sis has been given to neuroradiologic imaging in, N# B+ @6 U! ^& e9 t
boys with precocious puberty. In addition to viril-
# i. K+ x6 |" _ Cization, the clinical hallmark of CPP is the symmet-
) M6 f! e0 B) o( d% erical testicular growth secondary to stimulation by
3 i. b: i3 G: [gonadotropins.1,3
g# v1 a/ v. |8 B5 lGonadotropin-independent peripheral preco-2 O. _+ C2 S( C, W
cious puberty in boys also results from inappropriate
) v) \# n' r) P# c; nandrogenic stimulation from either endogenous or
5 t# }1 H4 l0 {0 B" s( vexogenous sources, nonpituitary gonadotropin stim-
3 @2 R. \4 N p) mulation, and rare activating mutations.3 Virilizing
5 Y7 P' @; q. s, ^congenital adrenal hyperplasia producing excessive$ N8 `% w5 e' Y+ v$ y2 U
adrenal androgens is a common cause of precocious8 g5 y! n/ }- }: }$ e9 h5 I
puberty in boys.3,4
3 {1 A* l$ D4 O g1 J" t% yThe most common form of congenital adrenal2 m- K. l1 K3 C6 Q
hyperplasia is the 21-hydroxylase enzyme deficiency.
& R- S% N+ _3 XThe 11-β hydroxylase deficiency may also result in
; |5 y8 v$ _; f9 ^& C/ hexcessive adrenal androgen production, and rarely,
2 b8 v! ~) p) |* y# fan adrenal tumor may also cause adrenal androgen
/ H2 P$ K Z# r# `# G$ ?excess.1,3( p& _! R, X" a( y- I8 F% @
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ B/ X' }( w/ d5 P% p
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 f N7 n% W" R
A unique entity of male-limited gonadotropin-
% n# s( E* X. T. h. u3 Mindependent precocious puberty, which is also known
1 S& F0 ]; |5 z1 J- g' Vas testotoxicosis, may cause precocious puberty at a$ A! s/ O" l) c; {" L
very young age. The physical findings in these boys" x, Z: g- i- ^+ L
with this disorder are full pubertal development,: p5 ~; y/ B: J& D1 L
including bilateral testicular growth, similar to boys5 z4 Q7 U3 Y4 [1 P* w
with CPP. The gonadotropin levels in this disorder4 `- F( ]7 o L7 V0 w
are suppressed to prepubertal levels and do not show% U' T- V' Y+ i$ z: d
pubertal response of gonadotropin after gonadotropin-# }: }8 \# X0 ~) b
releasing hormone stimulation. This is a sex-linked
$ X0 A! ]% Y1 E8 Y) w; ?autosomal dominant disorder that affects only- R3 I- c$ @8 s/ ^7 O8 u, h3 L; o
males; therefore, other male members of the family
* d6 A) e$ q% ~: a! a& Q. omay have similar precocious puberty.3
. k- S2 I# o. Y5 H$ g* |& ^In our patient, physical examination was incon-7 P3 x, d8 T; a/ J$ {- F6 W6 Y
sistent with true precocious puberty since his testi-
`% e$ n, j) V3 [! t. [% ncles were prepubertal in size. However, testotoxicosis' Z# \# D% p/ O7 q8 F
was in the differential diagnosis because his father, ^ h6 Y' i0 C* O' f- i5 O v
started puberty somewhat early, and occasionally,! R3 w Z2 A0 E$ T8 d( Z% ]0 Y
testicular enlargement is not that evident in the
( I6 `; M/ |6 |+ L$ zbeginning of this process.1 In the absence of a neg-
$ Y- O& d3 X {- Wative initial history of androgen exposure, our
4 j& a4 f* M5 z4 f% @$ U# Cbiggest concern was virilizing adrenal hyperplasia,- s' |7 E3 H- Q6 D2 G$ F" f
either 21-hydroxylase deficiency or 11-β hydroxylase- {* u4 E3 S& ?2 q2 T+ ~( H! b
deficiency. Those diagnoses were excluded by find-4 z+ K& g {7 { I
ing the normal level of adrenal steroids.- k; J4 R) K- A7 s
The diagnosis of exogenous androgens was strongly6 q! H& W& J) G3 V
suspected in a follow-up visit after 4 months because
! k: _5 X. C: h7 bthe physical examination revealed the complete disap-0 ~5 d2 X5 [& a
pearance of pubic hair, normal growth velocity, and. G5 W1 s T) R+ H; O8 H3 i( u
decreased erections. The father admitted using a testos-
7 x* ^6 b7 K, T, Nterone gel, which he concealed at first visit. He was
& X) k. V: K6 @ c; q3 a; ^* J! O, Susing it rather frequently, twice a day. The Physicians’
% `0 L1 B' G0 V% P- A! ~- a' C. C2 QDesk Reference, or package insert of this product, gel or
$ K" P7 S$ q4 V1 w; D# ?8 m0 u7 scream, cautions about dermal testosterone transfer to
6 K+ `% B v- ~unprotected females through direct skin exposure.
5 b# w1 K; z! m( F. Y4 uSerum testosterone level was found to be 2 times the
5 z* u2 G; C( v2 z7 Y4 nbaseline value in those females who were exposed to/ \7 B9 B" r" F* m! C
even 15 minutes of direct skin contact with their male
& ]4 ~( m( E$ L S8 w" q8 V9 H7 h% gpartners.6 However, when a shirt covered the applica-
6 P( U# U2 h4 r0 jtion site, this testosterone transfer was prevented.3 ~4 g0 K% Z8 j& ]8 t# K5 ]
Our patient’s testosterone level was 60 ng/mL,; z& o' U) b7 [( m7 G
which was clearly high. Some studies suggest that2 Y3 B2 [5 S% `
dermal conversion of testosterone to dihydrotestos-
. ^9 |* M. F# S. M: H' cterone, which is a more potent metabolite, is more
4 Q8 Y) K. P& r/ L+ G+ Lactive in young children exposed to testosterone7 P' c0 K" G3 ?) A1 V+ J! c
exogenously7; however, we did not measure a dihy-6 Q' I) ?- M. T: P7 [
drotestosterone level in our patient. In addition to, \& \0 p$ T; B4 p
virilization, exposure to exogenous testosterone in
5 {7 p; T! N: j3 Z$ |children results in an increase in growth velocity and: |( [7 D3 ^/ S' S# v
advanced bone age, as seen in our patient.- G& `4 i" z4 R! L' q2 L. g
The long-term effect of androgen exposure during" t# P2 b" d! S5 U$ q% c/ \
early childhood on pubertal development and final
6 j1 p+ X9 I8 {! M( y& y J# |adult height are not fully known and always remain
! E0 O$ |/ e$ Q) [( M( Za concern. Children treated with short-term testos-8 g( l, Z) B+ _4 {
terone injection or topical androgen may exhibit some
0 f% q4 c5 A6 p) J- yacceleration of the skeletal maturation; however, after0 {, k. h z' U. Q% l
cessation of treatment, the rate of bone maturation# _( g( w& c2 i1 |9 ~& \; W
decelerates and gradually returns to normal.8,98 x' W8 r7 Q7 o
There are conflicting reports and controversy% A, k" \+ Y- b* p' ?1 p% e
over the effect of early androgen exposure on adult( K! `4 T6 G# L
penile length.10,11 Some reports suggest subnormal: z$ P" C( m4 n1 A( w
adult penile length, apparently because of downreg-
3 o; i4 e6 C# O% p# B, julation of androgen receptor number.10,12 However,; G6 w3 ?) L# @4 _3 t! F
Sutherland et al13 did not find a correlation between
^& I0 ~0 d# l3 Uchildhood testosterone exposure and reduced adult7 C$ Q9 g. y: n' ?$ v
penile length in clinical studies.9 h& Q6 _8 y* s3 G
Nonetheless, we do not believe our patient is( y& w, W1 z Q( L. P
going to experience any of the untoward effects from4 V u# q+ r1 w/ p1 u( \
testosterone exposure as mentioned earlier because! d1 N3 A1 m+ C, D
the exposure was not for a prolonged period of time.
! [4 K; g! C. c6 fAlthough the bone age was advanced at the time of
0 Z" r9 Y" [9 O# f+ idiagnosis, the child had a normal growth velocity at$ X1 y q, o2 N& l
the follow-up visit. It is hoped that his final adult
: {4 X ^; G* y' T7 wheight will not be affected.
# v4 L1 D9 N* C t0 uAlthough rarely reported, the widespread avail-8 T2 ^1 s; u( x
ability of androgen products in our society may
7 w: H9 i" l3 f' }7 Zindeed cause more virilization in male or female. \# c9 j3 H; n% q) J R7 d8 |
children than one would realize. Exposure to andro-& z. G" H, l2 R1 u+ B7 f
gen products must be considered and specific ques-& Y0 e5 x- G8 m3 b9 x
tioning about the use of a testosterone product or
f9 Z$ v3 L( P$ Agel should be asked of the family members during0 d9 P; w& v( G: K
the evaluation of any children who present with vir-
, p9 Z/ B: p/ X) ~ilization or peripheral precocious puberty. The diag-3 h) o5 @( A6 u7 q* X
nosis can be established by just a few tests and by
9 r. p' D7 I+ E7 Uappropriate history. The inability to obtain such a
. p; d( G, X: y8 D( G: J1 i; B# z( Bhistory, or failure to ask the specific questions, may
* Z. {7 a1 w/ }8 T& x0 iresult in extensive, unnecessary, and expensive9 j" K6 b& C8 z; L, r
investigation. The primary care physician should be7 }; _4 d5 m, M' ^
aware of this fact, because most of these children
3 h! H* j8 N6 K. p: Imay initially present in their practice. The Physicians’% `! q* q5 g) `' d3 b0 ~- o1 ~/ U
Desk Reference and package insert should also put a2 k2 X! v* d9 [
warning about the virilizing effect on a male or: y$ G' I8 j7 f, v
female child who might come in contact with some-! q# ~) r4 x" U6 ~4 X- d* A+ I6 c; E
one using any of these products.
' x4 K' l4 i# I( g) I3 q6 P' fReferences# N, ]- m; t0 {9 m. K
1. Styne DM. The testes: disorder of sexual differentiation
9 `8 P; R2 Y1 [8 @: g E: Nand puberty in the male. In: Sperling MA, ed. Pediatric, N7 J' M8 ^: n+ n8 O$ z2 ~4 f
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;& z: f' }% K) t, E' e5 [! V! n, h
2002: 565-628.7 N7 _, y( p8 x/ A7 i+ ?# h8 s
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious0 A4 e& t9 X8 W) V A+ y
puberty in children with tumours of the suprasellar pineal, o" e3 H" @* L) x6 R6 `* v
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
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# m6 a* b3 T( Aareas: organic central precocious puberty. Acta Paediatr.7 h1 N) z1 O( Z3 A2 d0 x; Q
2001;90:751-756.8 P5 ~. B% Y" c, J
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
( H7 f* M p, R6 ^- q! UPediatric Endocrinology. 4th ed. New York, NY: Marcel5 |: L5 w, G z# v7 T4 u
Dekker Inc; 2003:211-238.
' ]) a2 g) z1 W! |4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
2 W& l. n0 V7 adevelopment in a two-year-old boy induced by topical
& s: M( H9 w6 i5 dexposure to testosterone. Pediatrics. 1999;104:e23.8 _* U! _" B3 O8 T* j
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
& P5 H0 l% ]5 Z7 B7 h; D" USkeletal Development of the Hand and Wrist. 2nd ed.+ S/ E: D: e8 |1 T8 W6 K; {
Stanford, CA: Stanford University Press; 1959.
, M* |' j/ R+ c% m& m& f6. Physicians’ Desk Reference. Androgel 1% testosterone,
& e4 q1 r: c" w Z8 ^; D( Q7 pUnimed Pharmaceutical Inc. Montvale, NJ: Medical/ a7 V: e0 E0 Z7 o/ ^ u5 e
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