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Sexual Precocity in a 16-Month-Old a* [( {& j9 f
Boy Induced by Indirect Topical. }- @ h- k8 S& l' G9 F) \
Exposure to Testosterone, m. p, s2 k: H( Q/ v6 J* ^ n% d
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,26 d$ q( c5 n: B0 n' T
and Kenneth R. Rettig, MD1# Z% M) N1 j6 b
Clinical Pediatrics/ x+ L0 E* w; d+ \) g0 h
Volume 46 Number 61 o; L4 X4 x8 H7 e; G; X! ?
July 2007 540-543
6 e+ p3 `9 }7 Q* }% u© 2007 Sage Publications Q2 d* w9 [4 h2 Y
10.1177/00099228062966515 y3 E7 X5 a8 ?
http://clp.sagepub.com
; Q9 m' I P% |/ c& n- C! Zhosted at
# B* R6 e6 @" ?8 g b: z% }http://online.sagepub.com
9 K- X& U2 B7 APrecocious puberty in boys, central or peripheral,7 s2 D7 o# v1 i% b% [8 j
is a significant concern for physicians. Central$ \6 ~' }: ^- n: n
precocious puberty (CPP), which is mediated
; j e8 N0 o5 I% [( pthrough the hypothalamic pituitary gonadal axis, has
( P8 b2 @0 \* k6 c8 ?+ D( ~8 Aa higher incidence of organic central nervous system! ?% R5 W5 l% i4 ?" }4 ]
lesions in boys.1,2 Virilization in boys, as manifested. o# M. \- ^/ n. I7 Y6 j( t
by enlargement of the penis, development of pubic
, H3 R# F) ?, Hhair, and facial acne without enlargement of testi-
9 g( ^: o' `+ y- ~cles, suggests peripheral or pseudopuberty.1-3 We
+ \& O+ o2 A: Jreport a 16-month-old boy who presented with the! l0 B$ p$ f" p# D; Y. m9 m6 e
enlargement of the phallus and pubic hair develop-
/ t$ o3 m4 o, A/ x5 `! A% N lment without testicular enlargement, which was due
# f0 P9 Z- _2 Tto the unintentional exposure to androgen gel used by
* C& n4 E. G+ w& e" ?the father. The family initially concealed this infor-
: o! `5 ^ u0 e0 r) fmation, resulting in an extensive work-up for this# |( q, j! l' L; m9 N D7 Y! E# P
child. Given the widespread and easy availability of" C% u6 M" p7 f& T3 e/ T
testosterone gel and cream, we believe this is proba-
. m7 c4 P9 C2 x& sbly more common than the rare case report in the
2 l7 l7 G: c5 G* Yliterature.4+ [- z( B. K( Y
Patient Report
8 l# \3 o5 r. [$ E; V) DA 16-month-old white child was referred to the
( L. B0 r4 R; ^, l% N7 R/ u0 n/ S/ ]endocrine clinic by his pediatrician with the concern; T# L- j1 i% L$ p4 w2 b
of early sexual development. His mother noticed
) e4 D& g; U0 Plight colored pubic hair development when he was
y, Q0 D$ O5 @" JFrom the 1Division of Pediatric Endocrinology, 2University of& V/ I0 b7 B; u0 p v' ]5 k( p, I
South Alabama Medical Center, Mobile, Alabama.
" T8 N, @/ t0 ?# wAddress correspondence to: Samar K. Bhowmick, MD, FACE,
7 U. k% E1 E( ]6 Q6 r8 F& ]Professor of Pediatrics, University of South Alabama, College of, B1 M8 _4 U: j+ K
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
' ~+ B. y; c+ c: t" pe-mail: [email protected].# o! ]& l3 ^! {, H. w8 n
about 6 to 7 months old, which progressively became
0 o( i* P5 D5 u9 G Odarker. She was also concerned about the enlarge-; J2 c3 w8 L) M+ D1 V3 ]( h6 \# F
ment of his penis and frequent erections. The child
3 h! c5 N f( X$ U2 M; p) s: Vwas the product of a full-term normal delivery, with
# p) T% I" {: G7 Q" H: l' C; Da birth weight of 7 lb 14 oz, and birth length of
3 t S# K) v& U8 z20 inches. He was breast-fed throughout the first year! g2 ~% q6 Y4 U" k, L' I: c% Y
of life and was still receiving breast milk along with
' a! B) y: | U( `/ ]8 E6 W' a3 I9 ksolid food. He had no hospitalizations or surgery,1 }% a7 P0 a" ?2 j
and his psychosocial and psychomotor development
9 p) L f, i, l5 K3 y% e8 Q0 M9 r+ Z" gwas age appropriate.& T% C* p6 G3 A; v% X- Z# V1 ?& T! `
The family history was remarkable for the father,$ M G2 _/ M5 Y7 t) Z6 ?
who was diagnosed with hypothyroidism at age 16,$ T5 A3 \1 t, m" B/ S
which was treated with thyroxine. The father’s
) G8 d4 a+ v, @# _height was 6 feet, and he went through a somewhat
2 @7 L0 H6 m; Q) |+ v0 ?; \early puberty and had stopped growing by age 14./ A' y8 S' b# l) v8 a4 V
The father denied taking any other medication. The& l7 ^4 c9 ~3 M
child’s mother was in good health. Her menarche2 z( W) f! _8 G
was at 11 years of age, and her height was at 5 feet
2 b/ H7 e3 Y* |6 ?! p1 H: B5 inches. There was no other family history of pre-
$ b' Y$ A* J d5 [cocious sexual development in the first-degree rela-
8 _$ r! F% A0 N# htives. There were no siblings.3 m7 z/ b8 d1 M6 g" E
Physical Examination# p9 d: f9 x/ f: C, q
The physical examination revealed a very active,+ M. G. w$ q# q+ B ^ V+ [7 w; r4 M* s
playful, and healthy boy. The vital signs documented4 t& d1 W. t: U0 O5 ~% [
a blood pressure of 85/50 mm Hg, his length was
6 }3 I i2 t( c7 f90 cm (>97th percentile), and his weight was 14.4 kg
8 N! B p) s7 Y; w5 i, m: G(also >97th percentile). The observed yearly growth( }! e7 N& s/ L2 L0 h, x
velocity was 30 cm (12 inches). The examination of$ x0 i% s* @7 B* E/ Q! D: `# i/ F
the neck revealed no thyroid enlargement.
) n! x3 S) M. c3 z7 P4 EThe genitourinary examination was remarkable for
- P- j# y) ~' n( _enlargement of the penis, with a stretched length of
+ U1 K; |& z& U4 n5 M# Q' t! W6 O5 N8 cm and a width of 2 cm. The glans penis was very well9 R( Z* u! o, {, g
developed. The pubic hair was Tanner II, mostly around: M v) @- M+ u4 F, T# G1 n+ X
540
) |( e! _4 Z+ z3 t- d& }at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. P7 c$ w( c9 N
the base of the phallus and was dark and curled. The
: D$ t* G- L! _" D9 n1 Stesticular volume was prepubertal at 2 mL each., o! H) X7 x/ r/ y
The skin was moist and smooth and somewhat" a! X. N* } }1 r+ J e8 o
oily. No axillary hair was noted. There were no
0 b7 \/ Y+ ^2 H N8 U5 Oabnormal skin pigmentations or café-au-lait spots.* z5 F5 h& N4 c7 m d
Neurologic evaluation showed deep tendon reflex 2+- J# g' x+ b$ ~# x8 d D6 |+ T
bilateral and symmetrical. There was no suggestion/ `: Q6 V; ?4 i2 u9 I& Q
of papilledema.- y0 J3 `% L1 a) g3 I) H/ _
Laboratory Evaluation" K& s$ E2 @- ~* B
The bone age was consistent with 28 months by- ~, ^0 j6 x3 G& o9 C
using the standard of Greulich and Pyle at a chrono-
2 I1 w; Z7 u% Q( z# glogic age of 16 months (advanced).5 Chromosomal- o ?- J/ o" g6 p) e7 v# K
karyotype was 46XY. The thyroid function test! v- Q- @7 K. m) ~
showed a free T4 of 1.69 ng/dL, and thyroid stimu-" H0 ?; S! R( D1 T0 {
lating hormone level was 1.3 µIU/mL (both normal).: N8 [8 R# m. i5 _
The concentrations of serum electrolytes, blood
4 |+ ?5 l, S# `6 `urea nitrogen, creatinine, and calcium all were
3 O6 l# {+ ~# [* h1 uwithin normal range for his age. The concentration* B, n$ M) J1 w. v0 P
of serum 17-hydroxyprogesterone was 16 ng/dL% ^4 L( B/ t4 C0 X) z
(normal, 3 to 90 ng/dL), androstenedione was 20
. M) f% D( ^$ R7 c9 sng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
! m% f0 m6 ?1 {3 c/ gterone was 38 ng/dL (normal, 50 to 760 ng/dL),( Y3 j4 c4 m: Z" J
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
! n# D$ s: r3 c0 k5 C f- h49ng/dL), 11-desoxycortisol (specific compound S)
' ~. P" e) d/ ^/ I6 dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
5 j/ M [9 I0 w0 V4 }' o: U! Ktisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total# C! Q! i8 l B! K
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),+ s# ]4 y9 X( `) C
and β-human chorionic gonadotropin was less than9 x! q- k0 M2 Q: Q: D0 J$ c* h0 _
5 mIU/mL (normal <5 mIU/mL). Serum follicular
) R& B: C* y1 d6 P# ~* Zstimulating hormone and leuteinizing hormone
& [; L6 R ]% \) \/ ], xconcentrations were less than 0.05 mIU/mL2 `5 c+ X# [, n3 d. E* [
(prepubertal).* v/ A8 f) R: a% v/ @) l: k
The parents were notified about the laboratory- U4 K) i+ A0 T
results and were informed that all of the tests were/ A* e7 z0 ~2 ~6 }! `5 r# Z
normal except the testosterone level was high. The' S* {& E- T- ]- y
follow-up visit was arranged within a few weeks to
4 ^& ?! N) U9 [8 Xobtain testicular and abdominal sonograms; how-
# C1 e9 {1 e; K1 l* J. N/ Bever, the family did not return for 4 months.
6 M2 U% n, S- W3 IPhysical examination at this time revealed that the; a. ^, q$ }3 O
child had grown 2.5 cm in 4 months and had gained
. z w* B `. E1 M: C$ _8 a# c2 kg of weight. Physical examination remained
, B0 k9 V2 D9 z& Z# j; iunchanged. Surprisingly, the pubic hair almost com-
[9 w( r3 O% ~1 W' ^pletely disappeared except for a few vellous hairs at; |7 a* G0 c( o3 l
the base of the phallus. Testicular volume was still 21 n3 i" A6 I0 F( [$ `$ g: }0 M
mL, and the size of the penis remained unchanged." Z- N) ?- H& u
The mother also said that the boy was no longer hav-8 J6 q( p1 i3 `; b
ing frequent erections.
$ |) u4 R' ?# K5 W: S7 d" ZBoth parents were again questioned about use of
* m7 ^# O6 R3 U" r1 W& H% K! kany ointment/creams that they may have applied to/ H" Q, E) x# W* N4 u
the child’s skin. This time the father admitted the6 `2 B* I6 }, w* h; `+ B( X
Topical Testosterone Exposure / Bhowmick et al 541
; b# p( Z* q) Z4 u; juse of testosterone gel twice daily that he was apply-5 s4 a$ A8 y' W, K0 j
ing over his own shoulders, chest, and back area for0 M# w- U1 o1 \# @5 O5 b- J
a year. The father also revealed he was embarrassed
7 h5 C- v; M' J- V, J% Kto disclose that he was using a testosterone gel pre-
/ \ P% B- c7 T' escribed by his family physician for decreased libido& m) i7 _6 s+ U! |
secondary to depression.
o* [, u8 {/ J1 SThe child slept in the same bed with parents.
, Y% g6 w% D( K7 I: t: O \The father would hug the baby and hold him on his/ D; @, N, P, ^
chest for a considerable period of time, causing sig-
/ _! q, G8 _3 p5 M/ g5 ~nificant bare skin contact between baby and father.9 u$ v9 `. w @5 ^8 {
The father also admitted that after the phone call,
9 E- U" \$ f+ X6 Cwhen he learned the testosterone level in the baby
1 x% [2 e; l( Fwas high, he then read the product information
1 t2 ~" O' ^- o9 z6 ^packet and concluded that it was most likely the rea-
# v3 w3 U5 F9 x0 [: Lson for the child’s virilization. At that time, they
0 U6 B0 C. Y6 C( Y1 ldecided to put the baby in a separate bed, and the
Q* ^- W3 z3 n" Rfather was not hugging him with bare skin and had
- b3 y% L# b9 w3 {- M! Vbeen using protective clothing. A repeat testosterone
2 O4 M# l0 I: q6 ?- I& r0 ?1 ~$ [test was ordered, but the family did not go to the
( F. l# s* C& \" X1 z9 z. @laboratory to obtain the test.
) \0 F* Y/ M6 M! s7 l- @- f* xDiscussion
$ a8 o4 O+ t6 @6 [8 x6 g6 H" ?Precocious puberty in boys is defined as secondary, A3 h4 `# Q$ @, ]5 r7 k$ i
sexual development before 9 years of age.1,4: v" D( u2 c+ S. ^
Precocious puberty is termed as central (true) when# o% j' o1 m" J. }
it is caused by the premature activation of hypo-. m3 `' P2 c5 I6 m& o2 f
thalamic pituitary gonadal axis. CPP is more com-. B% \# B- ?& f2 T4 ?( T8 D
mon in girls than in boys.1,3 Most boys with CPP
& C" \- Q% u: P6 V$ M x7 M6 Vmay have a central nervous system lesion that is
T( o3 r, Z+ C; D! P( d0 [! b1 Fresponsible for the early activation of the hypothal-* B8 X0 ~# J# z
amic pituitary gonadal axis.1-3 Thus, greater empha-
6 H: y) Y+ X8 b% a' ~sis has been given to neuroradiologic imaging in
" A5 \5 n* v8 Bboys with precocious puberty. In addition to viril-
- }% Y) J! F" L$ D, n8 G: ^7 Qization, the clinical hallmark of CPP is the symmet-5 ~8 T% H2 K; x+ J9 E
rical testicular growth secondary to stimulation by
0 s( Z% i* @8 I( d2 e: Q& [, ygonadotropins.1,3; T3 V( [. @6 ]3 l E! S
Gonadotropin-independent peripheral preco-
$ p8 b6 t9 ^+ P( t" I. rcious puberty in boys also results from inappropriate# j7 H7 A! [ Z2 @2 ?
androgenic stimulation from either endogenous or
" ~* y# }% c ?+ ?$ l& }1 mexogenous sources, nonpituitary gonadotropin stim-
% _- ~$ l1 |# J( sulation, and rare activating mutations.3 Virilizing9 X c A4 x$ P( L6 X+ q
congenital adrenal hyperplasia producing excessive
6 L; Q/ I R6 Y1 ]6 ~7 Uadrenal androgens is a common cause of precocious
# N" C6 S: ^' M8 C+ Z4 Dpuberty in boys.3,4$ [+ F* [8 p6 Z- x
The most common form of congenital adrenal* X ~+ W* z1 d9 Y# d
hyperplasia is the 21-hydroxylase enzyme deficiency.
4 J' S5 s# h6 c0 l9 F2 FThe 11-β hydroxylase deficiency may also result in* [4 }" x- c2 Y/ B6 [! h9 L
excessive adrenal androgen production, and rarely,1 o) Q) `- h2 Q) X! v
an adrenal tumor may also cause adrenal androgen
0 _6 m( j; G2 O/ i/ L/ c3 S7 Qexcess.1,30 C* _" t% J- k6 b9 @6 H n3 |; }
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 ]! a: t1 T6 |8 \542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
$ g t# A% N- d) W- z8 p: uA unique entity of male-limited gonadotropin-4 Y6 H1 M' O6 j
independent precocious puberty, which is also known
3 ~0 Y& W9 @( K( \& I; ]# `as testotoxicosis, may cause precocious puberty at a* J1 y0 M0 F$ x9 J7 k. W
very young age. The physical findings in these boys
8 t. I9 A3 J" _* twith this disorder are full pubertal development,
8 E- q% q6 n' q0 Y5 |including bilateral testicular growth, similar to boys
1 p+ A& l! o' w1 b9 }6 a$ hwith CPP. The gonadotropin levels in this disorder! j3 s3 E, b; r8 l1 h. W: f: f
are suppressed to prepubertal levels and do not show
% N5 F4 {6 L8 Npubertal response of gonadotropin after gonadotropin-
* u- X* Q- u/ R+ F! wreleasing hormone stimulation. This is a sex-linked z0 `; Y: I, D. k! S: n U
autosomal dominant disorder that affects only) c/ I0 {! S, H, u1 M. U; j$ o! K6 Z
males; therefore, other male members of the family$ L5 v3 Q n+ _3 b9 W
may have similar precocious puberty.3, a( n8 x! R# M& w
In our patient, physical examination was incon-
1 p0 V! I& | `9 |' d; bsistent with true precocious puberty since his testi-
, G" V2 e2 Q4 l' `cles were prepubertal in size. However, testotoxicosis
" w/ g8 j2 M2 R0 iwas in the differential diagnosis because his father
& T) y u. T4 Y: }- Istarted puberty somewhat early, and occasionally,
6 o. I4 D7 A6 ktesticular enlargement is not that evident in the, L. }( \2 y& o$ l3 E
beginning of this process.1 In the absence of a neg- r" m1 ^3 ]( y" z* w. O
ative initial history of androgen exposure, our
8 v* A( ~) l- v; G9 y! Q; E( lbiggest concern was virilizing adrenal hyperplasia,
3 m$ r% I% o5 U! P3 S- a& Oeither 21-hydroxylase deficiency or 11-β hydroxylase2 ]: h3 l# S1 }/ S5 L
deficiency. Those diagnoses were excluded by find-
2 r# e' [" f+ Q+ Z& p% M7 sing the normal level of adrenal steroids.: f. y+ I! U% q
The diagnosis of exogenous androgens was strongly9 S" h1 w* W7 Z6 ^+ ?8 q! K
suspected in a follow-up visit after 4 months because2 K6 O0 R5 \! E. v& n
the physical examination revealed the complete disap-. Z/ p) a0 T+ \# W9 q, |0 ^, t! o
pearance of pubic hair, normal growth velocity, and- r1 p; L* [1 G0 r+ B
decreased erections. The father admitted using a testos-
: J4 E' N) ?+ H3 oterone gel, which he concealed at first visit. He was
* T3 N: N0 l8 h3 f4 V+ Z: q" ?, Fusing it rather frequently, twice a day. The Physicians’- i$ ` q1 y( C- _3 v, t6 _
Desk Reference, or package insert of this product, gel or# C& t7 |$ C# k8 `" w
cream, cautions about dermal testosterone transfer to
2 i) Q* C' z# ]# e% p8 C# d2 ?- Wunprotected females through direct skin exposure.
" Q/ w6 ]" o* }( HSerum testosterone level was found to be 2 times the6 S! B8 u2 |8 r8 O
baseline value in those females who were exposed to" _, r3 t9 {& x; |3 E8 I% h1 R Q
even 15 minutes of direct skin contact with their male8 o3 R" Y+ h/ ~
partners.6 However, when a shirt covered the applica-6 J* y8 A, T- P
tion site, this testosterone transfer was prevented.
9 S6 f r; ^% y B1 V, F" yOur patient’s testosterone level was 60 ng/mL,
2 S+ X* x8 L0 mwhich was clearly high. Some studies suggest that
. [; w$ `. m. ^5 U) e+ z: Zdermal conversion of testosterone to dihydrotestos-& }0 F. L' F9 Y' t$ g2 C4 G: [2 w
terone, which is a more potent metabolite, is more% M$ o2 ?! w$ T* n$ i! M
active in young children exposed to testosterone# n5 w$ z( @& K/ @
exogenously7; however, we did not measure a dihy-6 N( u( O& U& x) f) ^/ F! i
drotestosterone level in our patient. In addition to& F; ^( C; @! h) z( L/ f' Q
virilization, exposure to exogenous testosterone in- u+ I' I- x/ A( [& M* Q; o
children results in an increase in growth velocity and
6 V2 k1 ?- j/ R/ k* R" Z1 T( ^advanced bone age, as seen in our patient.
Y' {; x2 d) n* F( Y- I8 cThe long-term effect of androgen exposure during
8 \: c. N3 ~- `% g9 Rearly childhood on pubertal development and final
; j( {, m6 }) Radult height are not fully known and always remain
& q- m5 u9 O; I& g, B" d7 ?* Ea concern. Children treated with short-term testos-! {% H* }. [# M5 a/ \. v/ o
terone injection or topical androgen may exhibit some
/ N& N. a/ F1 N, K5 |" _1 |acceleration of the skeletal maturation; however, after
; b- ]9 s* |1 O( F% qcessation of treatment, the rate of bone maturation
# x" _8 x" _' e8 S/ Ldecelerates and gradually returns to normal.8,9- m/ l9 L# P% ?
There are conflicting reports and controversy! D( |& a2 } Y' T) E+ F& L) D( q
over the effect of early androgen exposure on adult9 j* z, Z4 T' \. C
penile length.10,11 Some reports suggest subnormal7 ^. j6 i9 z0 \' l/ I: ^
adult penile length, apparently because of downreg-
( i' R/ `5 W; Y- w# Aulation of androgen receptor number.10,12 However,
: V1 w. w) M9 G1 x- aSutherland et al13 did not find a correlation between
6 n" s7 ^6 J2 W [# N, |( bchildhood testosterone exposure and reduced adult
1 S2 F6 @1 B Y# N7 L: Qpenile length in clinical studies.) Z* w$ m2 Z, E% A
Nonetheless, we do not believe our patient is
/ E F, {3 r/ r. X/ q5 fgoing to experience any of the untoward effects from
: W! e2 f$ L/ }9 o( ^% Mtestosterone exposure as mentioned earlier because; h( p- N+ u z! C3 s
the exposure was not for a prolonged period of time.6 H3 F6 `) }5 G+ ]6 P, q. H
Although the bone age was advanced at the time of
! h4 M& y; D5 I: h; Ndiagnosis, the child had a normal growth velocity at+ d( y/ `+ i6 @1 D- ?9 ]. M
the follow-up visit. It is hoped that his final adult
; u9 k$ ^. ]! \1 qheight will not be affected.
, C. M- U: u) E& G& c! sAlthough rarely reported, the widespread avail-* {3 X; Q% K$ l0 ?" Q
ability of androgen products in our society may
, A/ U; ]4 D4 a, T0 E4 }% hindeed cause more virilization in male or female
3 f7 z% v2 j9 x. r' nchildren than one would realize. Exposure to andro-; g$ m9 c6 ?8 G- a( ^* C% c9 ^# F
gen products must be considered and specific ques-
' \9 V9 D, |7 A# R' p$ `9 otioning about the use of a testosterone product or
7 }% [( _& Y' ~' agel should be asked of the family members during
) p- [, @: T" w$ nthe evaluation of any children who present with vir-
% A" p" c! R% c: \" r8 P0 H% Jilization or peripheral precocious puberty. The diag-
( y. q W% P3 V+ Qnosis can be established by just a few tests and by
: C2 t0 [" l# r5 _ q% Nappropriate history. The inability to obtain such a
$ t* } I g( r( z" Mhistory, or failure to ask the specific questions, may! c8 E: G7 `, {+ T5 G3 z+ Q
result in extensive, unnecessary, and expensive
4 T" \, W# u% C; Winvestigation. The primary care physician should be
0 g5 A& v2 ?% w( F# X$ ~aware of this fact, because most of these children
: W y4 F# O# ~$ Wmay initially present in their practice. The Physicians’. w+ ~9 k, m) y) z6 x( D' |
Desk Reference and package insert should also put a
; ?" i8 u3 q2 R- Awarning about the virilizing effect on a male or
/ t7 [- I8 o" X) z+ hfemale child who might come in contact with some-' x& z) [) ~" g' q! g+ Z0 c/ U
one using any of these products.
6 ~* L' O0 c! Q* g3 F- N r3 t) }References2 {. \8 a. M, ]3 g* H
1. Styne DM. The testes: disorder of sexual differentiation# y+ C/ K8 o) I( w: N b) b$ g; }
and puberty in the male. In: Sperling MA, ed. Pediatric
" w/ e* f0 i3 Y/ \. o% REndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
% t; o% ~, O$ Y1 ?+ g( p+ Y, k' @2002: 565-628.
% [, w2 V7 @4 |2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
" h+ U; T( s5 L( V+ j: m! N. tpuberty in children with tumours of the suprasellar pineal |
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