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Sexual Precocity in a 16-Month-Old. a3 y* Q3 i# _% O% q9 l
Boy Induced by Indirect Topical
" b; q, v" z, T8 w) HExposure to Testosterone
3 h0 A6 j6 E, _Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2. v5 H" L7 } v( T
and Kenneth R. Rettig, MD1$ m3 j" T* C! s$ Z/ ?. _3 M
Clinical Pediatrics4 I; r- u, L3 B
Volume 46 Number 64 j5 d4 U0 T/ @' b: G
July 2007 540-543
8 }0 S: n) N D1 O }© 2007 Sage Publications
, ?4 X' }, r; D" @3 r10.1177/0009922806296651& ^, o: M) E1 Q m9 h/ J
http://clp.sagepub.com A- g% V: I6 ?, {1 b; C
hosted at
. G4 I+ o2 c/ A( l2 Ohttp://online.sagepub.com
1 H2 `+ B% D* k6 VPrecocious puberty in boys, central or peripheral,8 t' K# g: o6 d
is a significant concern for physicians. Central
7 |4 z- i1 n: A& D7 }) gprecocious puberty (CPP), which is mediated' T& l/ |0 i0 H" z# ^1 N4 ~
through the hypothalamic pituitary gonadal axis, has N+ l" ]9 p1 M
a higher incidence of organic central nervous system
- d% I3 g) H; ~4 P. h. llesions in boys.1,2 Virilization in boys, as manifested
1 \# H0 e# f& x/ s9 Uby enlargement of the penis, development of pubic2 k5 N, ~0 E3 r, [2 J3 {3 D, c
hair, and facial acne without enlargement of testi-/ y/ n I) G4 e& v2 n* u, U% C$ ?
cles, suggests peripheral or pseudopuberty.1-3 We
: D! d- _- N0 ?8 D$ O, L" |report a 16-month-old boy who presented with the2 ]- f: ]5 u: b. Q! O7 h
enlargement of the phallus and pubic hair develop-. f' E: d! B' b6 s
ment without testicular enlargement, which was due. r4 b/ s: e1 _) m
to the unintentional exposure to androgen gel used by
5 V* Y* A* m8 C8 P# u% Jthe father. The family initially concealed this infor-5 I0 l' }" U- b
mation, resulting in an extensive work-up for this
" K) S, Z5 `$ K, r; j/ G* |child. Given the widespread and easy availability of
: ?+ l+ j8 t) B/ jtestosterone gel and cream, we believe this is proba-
" G" k8 G6 k! n/ K0 h, f8 ?bly more common than the rare case report in the9 x' S# j: e' I- u; N( F8 U0 t2 o
literature.4# e& u! ^4 P& l8 F: B# Q3 L
Patient Report
1 ]' v/ S1 J- D8 z/ y- u$ uA 16-month-old white child was referred to the K( i9 N1 N# V4 _5 @; G( F
endocrine clinic by his pediatrician with the concern
3 o5 v8 ?1 l7 I$ @of early sexual development. His mother noticed1 N# ` x' m! W: G/ [* x3 M" E1 @! [
light colored pubic hair development when he was
2 t4 a- r5 k; Q0 N6 ?/ Y5 vFrom the 1Division of Pediatric Endocrinology, 2University of- q- { W7 f/ {2 Q
South Alabama Medical Center, Mobile, Alabama.
& q0 [+ F" |% v/ dAddress correspondence to: Samar K. Bhowmick, MD, FACE,
/ O) l! A- }, ~6 E+ j) \Professor of Pediatrics, University of South Alabama, College of
5 F- z2 O; k, g9 oMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;1 R" p& m# C+ ]0 T/ O
e-mail: [email protected].3 {) \; [' O: E! U9 T2 {
about 6 to 7 months old, which progressively became6 |4 L- m- h+ O% U) W
darker. She was also concerned about the enlarge-5 ]+ r6 Z& B# Q) b
ment of his penis and frequent erections. The child
& D& ^: f( e; mwas the product of a full-term normal delivery, with/ v8 M( V. c7 E D1 b/ S5 {! X. }
a birth weight of 7 lb 14 oz, and birth length of
- w! H+ H" w. U. a6 e7 J20 inches. He was breast-fed throughout the first year W) a0 B2 o+ s2 X5 o; B
of life and was still receiving breast milk along with+ \, R6 F; `. s& w5 G
solid food. He had no hospitalizations or surgery,; I% a* _1 w0 C- G. y# I( m0 s
and his psychosocial and psychomotor development
- `4 C& O5 C: R8 j$ \ E- Twas age appropriate. k* Q r' K" N; ]% S
The family history was remarkable for the father,
1 {& E7 M- d: R6 V- P: w, lwho was diagnosed with hypothyroidism at age 16,8 k; h" J- I1 N' k5 C8 ^" K
which was treated with thyroxine. The father’s0 r4 {6 G5 W" J, S, X$ U
height was 6 feet, and he went through a somewhat2 p5 n/ e. Y9 a. e) S
early puberty and had stopped growing by age 14.4 u [% C4 d D
The father denied taking any other medication. The0 I# t2 I% h. o8 J( a- z
child’s mother was in good health. Her menarche( w- N( V& v _& h5 E. L
was at 11 years of age, and her height was at 5 feet
( c$ V" d% r4 s6 H5 inches. There was no other family history of pre-1 F) ]: N# A" {
cocious sexual development in the first-degree rela-
% |8 \5 N; \: d! T/ O& c( ftives. There were no siblings." H' V7 O: u! a8 P; X! ^; ]5 @
Physical Examination9 A* [1 J8 G- H& s
The physical examination revealed a very active,
' K5 v6 ?7 N' v6 z6 u5 }9 ?playful, and healthy boy. The vital signs documented8 p- U! d2 t) ~8 `$ U* Z
a blood pressure of 85/50 mm Hg, his length was
6 V1 ^6 [- T) v; m! j90 cm (>97th percentile), and his weight was 14.4 kg5 P$ W0 {2 R$ d# p6 R( S% D
(also >97th percentile). The observed yearly growth5 {* y$ G: t9 Z, b7 ]
velocity was 30 cm (12 inches). The examination of
' z; @5 U2 U2 @0 R s2 {; Q- c* Othe neck revealed no thyroid enlargement.) N a) T) W/ L. D/ z
The genitourinary examination was remarkable for
+ z ~* _# E% m. C/ f6 fenlargement of the penis, with a stretched length of% E0 g" ^* q4 H2 }7 s' y% _
8 cm and a width of 2 cm. The glans penis was very well
4 f) r- Z1 U5 Q$ f$ u; c' u% Kdeveloped. The pubic hair was Tanner II, mostly around$ L3 z& C }1 I
5401 _& c' l' c A: G- |. N; Y p2 g
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) s4 ?7 G7 `5 q% p ~! i& [
the base of the phallus and was dark and curled. The
# Z! I: d9 M( ^( Rtesticular volume was prepubertal at 2 mL each.9 l9 [# T" Z% w* f/ a- X$ v
The skin was moist and smooth and somewhat+ d/ d' d1 ?# j" v0 }( {
oily. No axillary hair was noted. There were no
/ q2 p) u" `& F/ t; A4 i* T. sabnormal skin pigmentations or café-au-lait spots.( G Y0 y' R) S; K0 ?
Neurologic evaluation showed deep tendon reflex 2+- E' G& [$ ~0 l$ ^) f( U
bilateral and symmetrical. There was no suggestion: L4 |, V S8 ]/ k
of papilledema.
$ P6 Z, U9 @8 ?, y2 ?Laboratory Evaluation
! ^1 o4 a. @+ P0 o4 n7 NThe bone age was consistent with 28 months by% X8 G2 {5 X$ s( s3 N2 k1 O
using the standard of Greulich and Pyle at a chrono-( v% X, d9 ]( p3 g/ t/ }/ p0 a
logic age of 16 months (advanced).5 Chromosomal
1 E! h0 n& {! C, Nkaryotype was 46XY. The thyroid function test
( t4 ~& i# ?: N$ ]% z; Fshowed a free T4 of 1.69 ng/dL, and thyroid stimu-2 ^& ?, o- Q8 F0 T
lating hormone level was 1.3 µIU/mL (both normal).
) L, Y& |1 S7 `3 P' j9 L: K* a2 \The concentrations of serum electrolytes, blood, Y) B5 k! g6 Q O0 f
urea nitrogen, creatinine, and calcium all were
. r: [/ X- V; owithin normal range for his age. The concentration
$ G0 J9 U- l' e9 L6 lof serum 17-hydroxyprogesterone was 16 ng/dL* ]' r* d$ d* ^* E
(normal, 3 to 90 ng/dL), androstenedione was 20# s4 b Z( r, L, s4 [
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
$ H* q3 Y4 ]! w- A5 A& Fterone was 38 ng/dL (normal, 50 to 760 ng/dL),
6 k# P6 N7 I7 P( e. X, ]desoxycorticosterone was 4.3 ng/dL (normal, 7 to+ y6 x T; D5 R
49ng/dL), 11-desoxycortisol (specific compound S)
7 e6 D& |$ R9 @" Pwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-( u0 X9 O& l/ r. r
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
. x# j3 p( N2 p4 U* m: S9 rtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
8 [& K9 P, e3 t% W& F7 ]+ Iand β-human chorionic gonadotropin was less than
% w' l" L7 o* R9 A5 B5 mIU/mL (normal <5 mIU/mL). Serum follicular8 y& I" S4 f* T
stimulating hormone and leuteinizing hormone
3 H) Q3 h: g; kconcentrations were less than 0.05 mIU/mL
/ w# _- W0 j2 N" h3 s4 X2 N(prepubertal).
1 L( v3 G0 w o+ x6 W# TThe parents were notified about the laboratory3 p0 _4 f: O+ i
results and were informed that all of the tests were
, M# R" O; J$ ]) j fnormal except the testosterone level was high. The; G+ @+ q+ v2 _) A
follow-up visit was arranged within a few weeks to. _& ]$ U. k7 ~. u
obtain testicular and abdominal sonograms; how-0 o& H2 Z! y: o5 f( d7 r% D
ever, the family did not return for 4 months.2 ~+ r! }- V) N0 k8 s0 }
Physical examination at this time revealed that the
! R' }3 Z1 Z( ~4 c! F) ?- x; xchild had grown 2.5 cm in 4 months and had gained
Z9 _4 w( q( {. u. F; R+ O2 kg of weight. Physical examination remained% D7 c/ B* i, g" |$ n3 D: u
unchanged. Surprisingly, the pubic hair almost com-
% l/ x# @" E3 D. D- lpletely disappeared except for a few vellous hairs at
) v& o+ |! O- } ?" Hthe base of the phallus. Testicular volume was still 26 f6 L5 h; R( b7 h& \$ o
mL, and the size of the penis remained unchanged./ X: u2 n4 ]4 t8 S
The mother also said that the boy was no longer hav-
8 @- E* `: j2 s# g( d {" ring frequent erections.2 U* h+ S* y) c
Both parents were again questioned about use of
: {+ R5 \0 p& q% r, n2 Uany ointment/creams that they may have applied to
; F3 o4 v. R+ x: {. Pthe child’s skin. This time the father admitted the1 l, y# M! |! k C; D* \# D T* n
Topical Testosterone Exposure / Bhowmick et al 541
. I: s# w; c2 V9 t4 l0 E' R' f1 Guse of testosterone gel twice daily that he was apply-
" g9 Z' D- ~/ |/ Ling over his own shoulders, chest, and back area for1 Q6 K% V: p4 H6 Y B+ y& s
a year. The father also revealed he was embarrassed
, i. j3 U8 M) p% N% vto disclose that he was using a testosterone gel pre-7 Q" R! ? R3 U+ |2 E. Z+ i
scribed by his family physician for decreased libido1 ~. J6 T! q @8 e/ \
secondary to depression.7 t0 t/ b- `1 @2 x, [7 c
The child slept in the same bed with parents.3 v& y6 G7 P8 b: R; j- o
The father would hug the baby and hold him on his& ]( w( D4 z. A) J8 r
chest for a considerable period of time, causing sig-7 O; f% U6 m8 i& }8 j# _
nificant bare skin contact between baby and father.
. D* K6 y2 Z, S( N' g+ uThe father also admitted that after the phone call,
# p! j+ b6 F4 p* nwhen he learned the testosterone level in the baby/ L5 C7 {2 |# ?
was high, he then read the product information! d1 E) e K8 Z: _- O' |
packet and concluded that it was most likely the rea-6 T+ F# C; O! {6 F) x6 Q: S
son for the child’s virilization. At that time, they5 v2 ?" e, k3 f
decided to put the baby in a separate bed, and the
- B; I4 D o2 b6 _7 k% T7 Hfather was not hugging him with bare skin and had
5 U& @" u- c0 @$ M" u/ Ubeen using protective clothing. A repeat testosterone
' Z! ~( z; K- @3 otest was ordered, but the family did not go to the
. r5 Z3 f8 J' T$ N R6 A Jlaboratory to obtain the test.
/ O! {5 C% |9 e) PDiscussion+ s! N9 w! P1 P3 p
Precocious puberty in boys is defined as secondary( z- L1 M% r. J2 ]! T
sexual development before 9 years of age.1,4
- l0 C5 G" h+ J9 ^Precocious puberty is termed as central (true) when" V4 t$ |" s! n I5 b! ~9 I
it is caused by the premature activation of hypo-
! z, ~: u! y- A( Dthalamic pituitary gonadal axis. CPP is more com-; H& n! G, W3 Y. X' O4 ~5 O$ u; \
mon in girls than in boys.1,3 Most boys with CPP: D9 |( b) d- ~" i0 }. a, |
may have a central nervous system lesion that is
+ y$ V! S- f X5 ^0 u0 O8 aresponsible for the early activation of the hypothal-
C+ L$ m+ A+ k, C# `5 kamic pituitary gonadal axis.1-3 Thus, greater empha-: T3 [. S- I! K1 ~1 w7 O% [- x
sis has been given to neuroradiologic imaging in( n' [$ ?6 v1 r- y
boys with precocious puberty. In addition to viril-
9 J! ]% d. ~) }! P8 M% E8 q' K2 rization, the clinical hallmark of CPP is the symmet-
4 y3 b& h; E: F0 a1 T" Y5 ?; G7 ^rical testicular growth secondary to stimulation by: V: x# ~0 X7 V9 M3 e) b& n
gonadotropins.1,3
" @ d4 v7 b T- h9 m# L% JGonadotropin-independent peripheral preco-. h" _# }% }: l+ [7 H
cious puberty in boys also results from inappropriate& B/ L& v! r T$ t0 p, C
androgenic stimulation from either endogenous or
4 e( Y R# i* x1 }4 iexogenous sources, nonpituitary gonadotropin stim-1 Z" e# V1 q$ F# U' g
ulation, and rare activating mutations.3 Virilizing% Z7 R" {/ z& f8 L
congenital adrenal hyperplasia producing excessive
0 @% ?1 e2 b. q/ a! \# [adrenal androgens is a common cause of precocious
5 g* `* r: f/ ?" A) \ `puberty in boys.3,4) q3 R/ [2 B J! m& J
The most common form of congenital adrenal
! v; k* p1 U. F; _hyperplasia is the 21-hydroxylase enzyme deficiency.
1 T' F# p9 l; `: LThe 11-β hydroxylase deficiency may also result in5 k e- S: o' Z6 [
excessive adrenal androgen production, and rarely," a2 q1 Q( q; ]& B+ D/ M$ q
an adrenal tumor may also cause adrenal androgen
& u8 o# K1 L7 J4 f8 [excess.1,3( O2 }$ t/ }: w' Y3 `
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- D+ G, w) B7 r4 I% T542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
. u% b G" {6 V5 Y) M- uA unique entity of male-limited gonadotropin-( a! f! ?; x8 Q# G+ J, ] z
independent precocious puberty, which is also known
! Q% c) A& {% K oas testotoxicosis, may cause precocious puberty at a; R$ A) ~% a( Z" E5 P7 [
very young age. The physical findings in these boys9 b% z8 x1 b# e8 v/ d5 j
with this disorder are full pubertal development,
# B2 [" f1 L$ H* x5 r5 w% ]9 N: kincluding bilateral testicular growth, similar to boys8 }, b6 q+ w2 J; P# ^0 N
with CPP. The gonadotropin levels in this disorder7 e- K& N. b2 k
are suppressed to prepubertal levels and do not show6 l; Q0 F/ O# s; @: E
pubertal response of gonadotropin after gonadotropin-, R6 F0 X8 z/ M2 y. w; O7 u
releasing hormone stimulation. This is a sex-linked' I& }6 g$ ?$ s% @# i2 v3 }
autosomal dominant disorder that affects only
( p0 \7 K* v M+ ~males; therefore, other male members of the family
2 P8 z6 j5 C6 w' `$ Hmay have similar precocious puberty.3
. b) h! Z8 h2 MIn our patient, physical examination was incon-
4 _ |' ?6 \* v% Esistent with true precocious puberty since his testi-( q+ m6 F5 P7 X* q7 [" w/ ~% J
cles were prepubertal in size. However, testotoxicosis
! |5 i/ C6 h1 V- p8 h6 Q; Z' W1 Uwas in the differential diagnosis because his father# u2 O; }) h4 x
started puberty somewhat early, and occasionally,
9 c- Q8 v4 u4 e, V$ q6 otesticular enlargement is not that evident in the
* K& E7 a& Q/ X3 [6 N0 s& n1 s! x( u# zbeginning of this process.1 In the absence of a neg-5 }1 E( a: _ R7 g3 g- V) X
ative initial history of androgen exposure, our5 m6 f4 B; C7 @# r5 j! o
biggest concern was virilizing adrenal hyperplasia,0 b7 [3 n: M H" H+ _8 l9 J
either 21-hydroxylase deficiency or 11-β hydroxylase
9 X9 G. E8 H9 z6 k0 c; Q( sdeficiency. Those diagnoses were excluded by find-7 r7 V" c, N6 ]
ing the normal level of adrenal steroids. @- k! E& G- n4 x1 x8 ^
The diagnosis of exogenous androgens was strongly
$ k/ V( y, n. l/ g6 Rsuspected in a follow-up visit after 4 months because2 R% j& t( |3 b0 E+ F. @
the physical examination revealed the complete disap-
; @2 |* l7 _# ~8 ~pearance of pubic hair, normal growth velocity, and
8 ~+ C) A5 N) P9 O/ ~: W0 c5 Xdecreased erections. The father admitted using a testos-
# D8 L! y1 `3 F. Hterone gel, which he concealed at first visit. He was) F8 g- E, f+ h' B8 I
using it rather frequently, twice a day. The Physicians’4 V% j. r4 W& I/ @8 M
Desk Reference, or package insert of this product, gel or
/ U m+ U! F& z- Gcream, cautions about dermal testosterone transfer to' H4 R2 h8 P6 _6 `+ u8 R
unprotected females through direct skin exposure.
0 _3 f Q' d2 w& I! {4 RSerum testosterone level was found to be 2 times the" e, I+ J0 Q0 w7 W4 [0 K
baseline value in those females who were exposed to
3 V% r) _# O# Q5 Z8 b( ]% o3 `# ^( qeven 15 minutes of direct skin contact with their male
/ B$ Q+ Z1 }' G' Kpartners.6 However, when a shirt covered the applica-
; f H2 I, z4 r0 ]! otion site, this testosterone transfer was prevented.
4 L2 S8 p. v5 g+ w) n: a! ^$ a, \Our patient’s testosterone level was 60 ng/mL,7 D1 L& @+ A$ D; n( _% `8 a' z W
which was clearly high. Some studies suggest that# m, h2 Y$ Z* K
dermal conversion of testosterone to dihydrotestos-5 L3 V2 `- h* `8 }: `
terone, which is a more potent metabolite, is more
' M! Z, Y% D) F) `0 a+ Kactive in young children exposed to testosterone
- X$ {5 {' B8 c" Cexogenously7; however, we did not measure a dihy-
3 E# _* F( F9 Q, f0 ?5 |! |3 V* ]drotestosterone level in our patient. In addition to& ^- Q; ?/ a3 x3 n* x( a
virilization, exposure to exogenous testosterone in
4 F+ c' n0 C& Y6 ~/ dchildren results in an increase in growth velocity and4 _6 l- _! T% t/ a3 W
advanced bone age, as seen in our patient.
# X" }& A0 |9 p0 B0 gThe long-term effect of androgen exposure during
4 \: c, a8 H X" kearly childhood on pubertal development and final
. }3 d- |' P! s; o/ T) k7 Dadult height are not fully known and always remain9 D# U- {& d# z6 e/ ]
a concern. Children treated with short-term testos-
* ~! r0 D( S0 l' q1 xterone injection or topical androgen may exhibit some
5 a* Z0 I1 P+ p- Z9 o& o( z% hacceleration of the skeletal maturation; however, after
/ b; {! i9 s+ b% s6 v, N3 [1 mcessation of treatment, the rate of bone maturation
/ V' [: {5 x* N& }; _decelerates and gradually returns to normal.8,91 b# F3 z$ t9 n% w$ P! J& U9 w
There are conflicting reports and controversy+ P V/ v7 y2 W) s7 I0 A
over the effect of early androgen exposure on adult
; z% T; r% F# F% d. Wpenile length.10,11 Some reports suggest subnormal
: w" [. u8 O6 g1 o- z9 [0 \adult penile length, apparently because of downreg-
, q- B9 }$ W& e3 T% ]ulation of androgen receptor number.10,12 However,; x* J0 m/ i3 I) |, C
Sutherland et al13 did not find a correlation between" U1 H- X6 A5 l F. j E
childhood testosterone exposure and reduced adult
! g o- r. v! L* X, @penile length in clinical studies.
F5 `9 ?' I8 tNonetheless, we do not believe our patient is
v/ j8 Y- V& r0 k+ f6 v) dgoing to experience any of the untoward effects from; Q$ S2 ?- [7 A/ C6 y- B/ B
testosterone exposure as mentioned earlier because
- q* d9 ~7 J$ kthe exposure was not for a prolonged period of time.
( o9 j3 e* V1 i9 ]5 x9 wAlthough the bone age was advanced at the time of
0 R9 N# w7 d, b6 q$ @% v( Idiagnosis, the child had a normal growth velocity at, b9 P4 D( c/ }8 V; A0 M
the follow-up visit. It is hoped that his final adult/ x q- D# c8 E& h6 Q! s
height will not be affected.) P7 ]4 r1 H& ^% R- w2 a
Although rarely reported, the widespread avail-
, x# y" `; l; N5 Iability of androgen products in our society may, M: R! t8 P+ I# S. I }: G
indeed cause more virilization in male or female
1 S* c; s5 j7 K$ j! dchildren than one would realize. Exposure to andro-
( d E8 q% u$ f' u, e5 p agen products must be considered and specific ques-1 f- C O2 Z/ O; L$ i' n5 B" C
tioning about the use of a testosterone product or
4 A* a7 F' J1 Dgel should be asked of the family members during
& a0 K6 U4 @- Z: M, v2 Rthe evaluation of any children who present with vir-# [6 T: T* c" F* f+ l5 C, P
ilization or peripheral precocious puberty. The diag-
$ w. k1 f% m# C4 N+ O) Qnosis can be established by just a few tests and by; R; S4 {& G7 ~& u2 }$ N2 f; K
appropriate history. The inability to obtain such a. t7 V F; Z) |7 G" I* K
history, or failure to ask the specific questions, may
- M) A9 X! q+ v' s% l5 Y# Presult in extensive, unnecessary, and expensive
" \ }. M9 b% linvestigation. The primary care physician should be1 D2 v$ r# N, Z b' m0 g7 D6 }' G8 _
aware of this fact, because most of these children$ h' I% g- d5 s( S$ }
may initially present in their practice. The Physicians’/ i z& e' H% C& L
Desk Reference and package insert should also put a$ y( l" f6 f0 ]# U
warning about the virilizing effect on a male or* ]2 @" Y' Y& F8 g" y; K
female child who might come in contact with some-/ z$ @7 \" F* [0 Z4 |+ o
one using any of these products.
% y+ {$ @1 S6 s- ~+ nReferences
# z+ C. p) B! V4 L6 T) X- [6 U1. Styne DM. The testes: disorder of sexual differentiation
3 B/ D; w9 O7 f. H$ W1 eand puberty in the male. In: Sperling MA, ed. Pediatric
) r& z, c3 n0 H% kEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;! T; b$ Q8 A$ L( l9 T& L+ u, c q
2002: 565-628.
0 Y. {& a8 ^1 d- }5 L' n5 p( H4 V2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
4 w" X8 Z ]: Y' g& q0 k- jpuberty in children with tumours of the suprasellar pineal |
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