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Sexual Precocity in a 16-Month-Old9 i" z" f# A' N7 v
Boy Induced by Indirect Topical
' W3 U# \& i2 UExposure to Testosterone* m, O$ g- U* a3 u. N
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
7 a# @( e8 T! ~9 \" z- Zand Kenneth R. Rettig, MD1 H& q2 ~7 D; M# x
Clinical Pediatrics3 T9 j1 [. M H8 Y
Volume 46 Number 60 H! m" f" F) @, G; ?) a. d
July 2007 540-543
: r K/ R- H2 m; u© 2007 Sage Publications
: O6 x3 b) S% _# j) E( ~* b/ K' `10.1177/0009922806296651
& u4 y& }5 f: g7 [http://clp.sagepub.com3 c$ ~; W" {2 S7 P! y W
hosted at
! D% |8 W+ a7 }( i$ Phttp://online.sagepub.com
& B9 H9 A% t2 h' VPrecocious puberty in boys, central or peripheral,. ?( F* G r. d, ?! {
is a significant concern for physicians. Central
1 h2 D8 H1 O* i% K9 |precocious puberty (CPP), which is mediated) `+ \+ p& b2 A, S- ^- e
through the hypothalamic pituitary gonadal axis, has& l! h. N4 l0 z+ @! Q# g Z
a higher incidence of organic central nervous system, Q# ~$ {6 @9 u ]. s
lesions in boys.1,2 Virilization in boys, as manifested
5 v! @6 O0 Y7 ]by enlargement of the penis, development of pubic
e" K# p U8 w$ v* `hair, and facial acne without enlargement of testi-! f# g$ t' X2 U* H/ [$ ]( j
cles, suggests peripheral or pseudopuberty.1-3 We5 A% i+ I5 b9 B8 W- {
report a 16-month-old boy who presented with the# e& c( W D) r; B# t# W+ k3 [
enlargement of the phallus and pubic hair develop-
* ~ v* E6 \$ M' E! X# |# L" jment without testicular enlargement, which was due
' D4 o6 ^4 j4 r# W! Dto the unintentional exposure to androgen gel used by! M+ F& A% a' x1 `: H1 S
the father. The family initially concealed this infor-
6 ^0 T, V- I# A* }! ]4 Umation, resulting in an extensive work-up for this
6 G: W: l. S$ |# `; lchild. Given the widespread and easy availability of
- u. ^: M" {, {. @6 p* E4 Vtestosterone gel and cream, we believe this is proba-: i, s6 @! B- n" s
bly more common than the rare case report in the
/ l6 u& m$ S1 n% w4 s: y4 Jliterature.4
* @) Q" Z6 D2 j, @* P# r5 KPatient Report
5 h( K9 D. ^5 i' z) iA 16-month-old white child was referred to the% h6 e' B5 g# q
endocrine clinic by his pediatrician with the concern) O1 l h( e& M" G0 M
of early sexual development. His mother noticed
- A- t& K" [2 ~5 R \! x* e* blight colored pubic hair development when he was
! k- _. z3 ^) i; S1 v" N% RFrom the 1Division of Pediatric Endocrinology, 2University of
% b% P6 c j$ NSouth Alabama Medical Center, Mobile, Alabama. _* @9 F- v4 y8 ^5 w9 D
Address correspondence to: Samar K. Bhowmick, MD, FACE,/ _% z, N z r& [2 K1 g# c
Professor of Pediatrics, University of South Alabama, College of$ I& n4 S' i8 {$ t, Z/ x
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;1 j2 g# b) q7 {0 S% ]5 ~* z
e-mail: [email protected].
4 W8 `& `% R. _; U |0 C# ]about 6 to 7 months old, which progressively became
: d) g# a' U' D8 s3 W, ?( u# O; h- ?darker. She was also concerned about the enlarge-+ m: u1 M- B; N4 d$ u* D. \9 N% L
ment of his penis and frequent erections. The child4 C) f7 J1 P& F
was the product of a full-term normal delivery, with
0 C8 u- o) P& s8 qa birth weight of 7 lb 14 oz, and birth length of& s3 \+ Q+ h( _# N# l1 N
20 inches. He was breast-fed throughout the first year
" s6 T# T- C' q- V2 o. G+ V0 eof life and was still receiving breast milk along with/ Y# y/ ^' W) N% P
solid food. He had no hospitalizations or surgery,
9 e% d/ w9 J( @4 kand his psychosocial and psychomotor development' R4 X' x- h' I* a+ K( O3 ^
was age appropriate.
0 t: X6 s6 F d4 H" ?4 `+ q& X3 rThe family history was remarkable for the father,
3 U, y7 K, p: ]: Wwho was diagnosed with hypothyroidism at age 16,
|4 F5 l! _, ?& Twhich was treated with thyroxine. The father’s5 ]3 a( ]! A! j5 l) o/ f
height was 6 feet, and he went through a somewhat' c; H& O s+ T+ K- t- H4 c* l
early puberty and had stopped growing by age 14.
2 N: m5 Z' }- }: [, IThe father denied taking any other medication. The
, [8 L. W- j& ^$ `child’s mother was in good health. Her menarche! i. o) P. k0 I- g% h
was at 11 years of age, and her height was at 5 feet0 M1 D) x! h+ }; e6 D+ f' a% M: `
5 inches. There was no other family history of pre-; P) Z4 A# [' i* `
cocious sexual development in the first-degree rela-
) z. ]; u2 }8 w( {. O, O Jtives. There were no siblings.
. B- Z3 Y! o: |' ?Physical Examination
% R8 w! N* t9 y& E4 DThe physical examination revealed a very active,9 K' @2 Z K1 w" e# @
playful, and healthy boy. The vital signs documented* j# `/ v& R( f
a blood pressure of 85/50 mm Hg, his length was
( q: p1 e& a7 z/ T! A90 cm (>97th percentile), and his weight was 14.4 kg
5 K- b% ^; L- D8 f- Y) p" `(also >97th percentile). The observed yearly growth5 l8 ?0 G: `1 ` k# b6 P: h
velocity was 30 cm (12 inches). The examination of
- B z/ H1 O2 a; n8 ithe neck revealed no thyroid enlargement.
, S$ O. w( _' b8 m( P2 hThe genitourinary examination was remarkable for- |9 I3 H- D" R/ m8 |
enlargement of the penis, with a stretched length of; C+ U6 @: O) Y
8 cm and a width of 2 cm. The glans penis was very well6 s! Q. Z0 O0 [/ w* K. Z
developed. The pubic hair was Tanner II, mostly around
9 L% [# A5 ^3 \# O! G' i2 ^9 i540
5 `/ d: o5 L" k* |& ?! C8 R( m; F. V% Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
2 l5 {, f' c! ^the base of the phallus and was dark and curled. The# N9 X3 M, w9 u( ^0 N
testicular volume was prepubertal at 2 mL each.
, t- g; }2 H, J0 J# u3 r S* M% Q- RThe skin was moist and smooth and somewhat
% y' Q0 h; N7 e/ I8 Doily. No axillary hair was noted. There were no! c! ^5 q" a! a. o
abnormal skin pigmentations or café-au-lait spots.
. M2 c. q5 A( f$ h% Q, @4 ?Neurologic evaluation showed deep tendon reflex 2+
- S) K( l3 k4 u! M0 Y }# lbilateral and symmetrical. There was no suggestion1 r. C2 W" G, x
of papilledema.
4 g6 t4 S( M. i# s% T# E1 ]& P! _7 SLaboratory Evaluation; H/ C8 c) ~% V
The bone age was consistent with 28 months by
) a* S6 N; S) _using the standard of Greulich and Pyle at a chrono-
2 j& F% R4 c+ g* Rlogic age of 16 months (advanced).5 Chromosomal' S6 ]6 L; O, I
karyotype was 46XY. The thyroid function test- i$ e" t2 W+ X. K {1 Q
showed a free T4 of 1.69 ng/dL, and thyroid stimu-% Y- e3 U# _( |/ T0 ]) S Q) u
lating hormone level was 1.3 µIU/mL (both normal).
8 o6 |9 a7 E* _2 s, g0 `' CThe concentrations of serum electrolytes, blood
- v9 }* q. G" I4 p6 K+ wurea nitrogen, creatinine, and calcium all were
2 S- F& f& c1 ?/ k& t$ g' |within normal range for his age. The concentration* L U. [: V4 g% O3 ^, w
of serum 17-hydroxyprogesterone was 16 ng/dL A( ]: _( \6 t) R
(normal, 3 to 90 ng/dL), androstenedione was 20) y5 c; w% w9 d- {# M
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
% ]% I, E! |( o5 V0 Y) C" X3 lterone was 38 ng/dL (normal, 50 to 760 ng/dL),
0 U6 x& M: m+ H8 \: H% b' @desoxycorticosterone was 4.3 ng/dL (normal, 7 to0 p8 s& `- t" g) r
49ng/dL), 11-desoxycortisol (specific compound S)
9 x* {2 Q+ U- Y8 V# j: V# Uwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-9 S l3 U# o2 C* s4 \* D
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total) o8 n6 m: \- K! R* C
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),& v9 h9 O* k- V+ R2 h( z( l }+ F1 p$ K
and β-human chorionic gonadotropin was less than
$ d6 `9 \2 G% a! j/ i- `5 mIU/mL (normal <5 mIU/mL). Serum follicular# _) F3 H% i/ P$ U6 p6 }0 r; \% {
stimulating hormone and leuteinizing hormone
' V5 ?* V8 A7 F( ?* Y D6 |: Mconcentrations were less than 0.05 mIU/mL% ?, ` ^2 p/ [+ I$ X! c+ I
(prepubertal).
, a! R- k! T$ t+ l( nThe parents were notified about the laboratory, |' N5 p& i5 |3 M2 {4 z: y+ D
results and were informed that all of the tests were
% o$ c3 e# ?* @. {5 T" Knormal except the testosterone level was high. The
" d" o5 e. I3 H7 d) b; @5 `follow-up visit was arranged within a few weeks to8 K# O% k: a7 n# d% H4 E& e
obtain testicular and abdominal sonograms; how-
$ I( \5 X" l6 r7 F5 Zever, the family did not return for 4 months.
5 O- K1 b: Z3 LPhysical examination at this time revealed that the l9 w' `& C, j _: i
child had grown 2.5 cm in 4 months and had gained* z2 x* X# l* c6 M0 A, V4 U0 `
2 kg of weight. Physical examination remained( h+ b3 y/ E! o( Q9 R
unchanged. Surprisingly, the pubic hair almost com-
1 [9 F: W$ }' opletely disappeared except for a few vellous hairs at
* |4 h: V4 ?! J( hthe base of the phallus. Testicular volume was still 21 U" S: \4 X# w$ C1 D' s) S
mL, and the size of the penis remained unchanged. f U. X. [2 {. E
The mother also said that the boy was no longer hav-9 r" i7 Y M5 z
ing frequent erections.
0 @* D7 J8 [4 ?8 `Both parents were again questioned about use of* o/ f& @- z; k" L4 ~
any ointment/creams that they may have applied to
* C8 ]0 Z9 p7 h& k' Athe child’s skin. This time the father admitted the
( ~0 p- B. \1 W+ `Topical Testosterone Exposure / Bhowmick et al 541 ^+ m" D) m: V; J; u7 z8 m
use of testosterone gel twice daily that he was apply- B L6 Y& ` s& M) G- `
ing over his own shoulders, chest, and back area for
$ @4 f0 ^" v. Z6 u& Ta year. The father also revealed he was embarrassed f H) Y: g8 Z; Q8 V# A
to disclose that he was using a testosterone gel pre-; A1 ?: i3 h) E! }* |
scribed by his family physician for decreased libido+ X5 ?' _7 d* F7 U
secondary to depression.. E; k' h+ t `* K( ~# c8 y8 x) `
The child slept in the same bed with parents.
1 d/ B) T/ L5 GThe father would hug the baby and hold him on his
! d7 V/ p) j; N" k* \. Bchest for a considerable period of time, causing sig-
2 I1 Y. Q+ z6 znificant bare skin contact between baby and father.
5 S! B& @ ~0 h3 F& [The father also admitted that after the phone call,
9 q: K" R; R$ k; k* Bwhen he learned the testosterone level in the baby2 s* Q; F; m i' C* {: ~
was high, he then read the product information
, D2 v% Z+ z1 o: `9 Vpacket and concluded that it was most likely the rea-
" i. a4 P1 d& Rson for the child’s virilization. At that time, they& g1 p$ E+ ?2 _# |5 g$ S
decided to put the baby in a separate bed, and the
! b6 S% ?: t' P( E! Y# ?: {9 Ffather was not hugging him with bare skin and had
( z$ E" x3 z/ |been using protective clothing. A repeat testosterone
. ?( Q2 R2 w: o$ c" c& j) Itest was ordered, but the family did not go to the& e P7 P4 z8 _# |+ y
laboratory to obtain the test.
# a/ y2 s& v, m7 I ?5 E/ S6 EDiscussion
" W* v" t0 s/ ~, H; o7 m: t6 xPrecocious puberty in boys is defined as secondary1 O1 i2 C6 m; [% G, ~7 i5 ^
sexual development before 9 years of age.1,4
* _& z. Q( p a3 N- ?4 c% t- APrecocious puberty is termed as central (true) when+ h8 R- n5 N8 R" q7 R
it is caused by the premature activation of hypo-+ y9 P" B* ]8 x" k$ d
thalamic pituitary gonadal axis. CPP is more com-
" i, x7 e* z1 ?8 m$ @mon in girls than in boys.1,3 Most boys with CPP% N. H L$ ^" E+ {* z. @1 ^! a
may have a central nervous system lesion that is
, C5 P( ]0 W" s$ o; Uresponsible for the early activation of the hypothal-
( v( Z8 U+ Y1 ]3 S# s4 W7 uamic pituitary gonadal axis.1-3 Thus, greater empha-; A7 T4 ~& R8 q1 h. a2 M, S# H
sis has been given to neuroradiologic imaging in. U: j9 Y& o/ F- ?
boys with precocious puberty. In addition to viril-
9 H% \& Q2 [1 f" {& E) S; Cization, the clinical hallmark of CPP is the symmet-
3 h3 ?, v# |, L, Jrical testicular growth secondary to stimulation by9 w( Z9 b$ B$ @! r
gonadotropins.1,3
( E4 a8 P3 _2 B& U; c: jGonadotropin-independent peripheral preco-
7 D- N2 J$ o2 F# J6 H: @cious puberty in boys also results from inappropriate% X% i6 G' o/ e2 ?" T
androgenic stimulation from either endogenous or% H$ w; y! _- [$ |7 T
exogenous sources, nonpituitary gonadotropin stim-
( U8 V2 s' n: {$ E8 b+ N" @ulation, and rare activating mutations.3 Virilizing1 x% T7 E I6 C5 a
congenital adrenal hyperplasia producing excessive, L, m% D$ R$ t1 x+ b
adrenal androgens is a common cause of precocious i1 T% a% Q. `- \6 c0 y
puberty in boys.3,4; m: Q3 X9 z) A. D8 p5 ~
The most common form of congenital adrenal
( P3 ^7 ?! Z/ T+ e8 ~- v6 Ahyperplasia is the 21-hydroxylase enzyme deficiency.+ {% N$ e, d; D5 M2 g6 v y% T
The 11-β hydroxylase deficiency may also result in
& K+ o+ H/ F) Q. qexcessive adrenal androgen production, and rarely,2 V, x* l6 L O. w8 z
an adrenal tumor may also cause adrenal androgen
+ F8 ?' M/ ]4 Pexcess.1,3/ ]9 ^3 w) B$ U0 p5 {( P; F
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 d( g& D" \( C$ r% _2 d542 Clinical Pediatrics / Vol. 46, No. 6, July 2007 C+ s4 |. {9 L! F
A unique entity of male-limited gonadotropin-
8 N; m! f2 P8 C' vindependent precocious puberty, which is also known
& `6 A% t+ o8 H! E; Pas testotoxicosis, may cause precocious puberty at a: a4 L) c6 p5 Y# U* ~0 A- \
very young age. The physical findings in these boys+ l# O. U; y- X
with this disorder are full pubertal development,* \' i* v9 [+ C, Y1 M9 u% W z
including bilateral testicular growth, similar to boys
4 |# ?9 Z: r; Rwith CPP. The gonadotropin levels in this disorder' \7 ^9 C! [ I' d- b+ d' Y
are suppressed to prepubertal levels and do not show, h$ c" ~" z+ k3 D5 y
pubertal response of gonadotropin after gonadotropin-
2 j0 `: L- a( mreleasing hormone stimulation. This is a sex-linked
- o% g/ m1 F- q( s+ {0 M8 p% Uautosomal dominant disorder that affects only
; J, T7 a7 G {7 }& W7 E/ _males; therefore, other male members of the family
% o6 S/ \5 Z2 p, r6 v2 K- B. R M6 Emay have similar precocious puberty.3 }$ B. [7 q* @. k+ R, l
In our patient, physical examination was incon- O1 Y& e# y9 c4 J
sistent with true precocious puberty since his testi- }0 }1 ^& F& g
cles were prepubertal in size. However, testotoxicosis
! T/ O+ Q7 W& X' q! u8 x7 ]was in the differential diagnosis because his father
& f0 a; A' i- o, W( Q9 y% mstarted puberty somewhat early, and occasionally,
F, g1 D# N2 I9 x/ `1 Htesticular enlargement is not that evident in the! q& `- B9 l7 j0 f: I9 Y/ d
beginning of this process.1 In the absence of a neg-
) f c) J1 J7 ^" ~% i) m' qative initial history of androgen exposure, our, m& Q% N& P& d3 o$ v' A% s& F
biggest concern was virilizing adrenal hyperplasia,
, Z6 }$ L# }9 H$ i' Veither 21-hydroxylase deficiency or 11-β hydroxylase
- x2 g4 M5 B, r* Ndeficiency. Those diagnoses were excluded by find-( S0 p; [$ i* l3 ^7 U1 o' E3 p9 \7 j/ B# v
ing the normal level of adrenal steroids.
% E+ C/ g Z) E5 w7 U. K5 h+ tThe diagnosis of exogenous androgens was strongly
. k# Q$ |4 u) o% ~, Esuspected in a follow-up visit after 4 months because
" e9 u$ Z5 B& D3 ~; R D# M2 Dthe physical examination revealed the complete disap-
$ M- q5 ]: O; Z' y- o) v2 X% @pearance of pubic hair, normal growth velocity, and* \1 V! }2 D) l/ H3 p5 z* x
decreased erections. The father admitted using a testos-- M# e1 v& b& U# n7 x
terone gel, which he concealed at first visit. He was
& Z* C6 L/ ^% \) s: c$ e# Musing it rather frequently, twice a day. The Physicians’: v$ h' H) l0 O# X
Desk Reference, or package insert of this product, gel or! `$ S, P6 q( j" ?
cream, cautions about dermal testosterone transfer to1 L7 {, m: m% X$ E! M" O
unprotected females through direct skin exposure.' O; r+ T$ O: \/ `! L9 ?7 r
Serum testosterone level was found to be 2 times the
. y- ]9 u }* l0 D" ~baseline value in those females who were exposed to4 k. T7 F# t7 a# n
even 15 minutes of direct skin contact with their male. L; {' m. A- e
partners.6 However, when a shirt covered the applica-
/ G+ ?4 X0 v- p5 e: r/ Mtion site, this testosterone transfer was prevented.
) l$ @; v7 G: m/ x; y OOur patient’s testosterone level was 60 ng/mL,
0 T; d: G4 w# r) v, ?: Swhich was clearly high. Some studies suggest that
2 D( s( m- I2 b8 q! Ndermal conversion of testosterone to dihydrotestos-
! E5 C! z" Z7 u! Y4 bterone, which is a more potent metabolite, is more
: Y+ e2 i1 T3 p9 @3 zactive in young children exposed to testosterone7 g, y+ a& \4 R6 q K
exogenously7; however, we did not measure a dihy-
9 \, O, S, A F9 Pdrotestosterone level in our patient. In addition to7 v) ]/ E' q# A/ A4 ~. ~. }
virilization, exposure to exogenous testosterone in
* }* D: A$ d2 k& rchildren results in an increase in growth velocity and
6 B: ]8 e( L+ D, Badvanced bone age, as seen in our patient./ I( a4 W6 [/ `" d( G
The long-term effect of androgen exposure during
. z7 Z7 Y' C! N; ^. Jearly childhood on pubertal development and final& ^) J) D$ @) o+ }
adult height are not fully known and always remain
4 `2 [ O( W3 k5 Aa concern. Children treated with short-term testos-1 u4 \4 T9 n/ m
terone injection or topical androgen may exhibit some8 @1 ?1 T# B- {
acceleration of the skeletal maturation; however, after
4 Z/ T3 I$ Z$ H) S/ \cessation of treatment, the rate of bone maturation
: F. U9 g, L4 q6 |" t0 odecelerates and gradually returns to normal.8,9
% n2 W: [6 R0 F- z3 `& m5 ?7 f- }, RThere are conflicting reports and controversy* c, ? B# u8 F3 a! x/ z( x+ j, l
over the effect of early androgen exposure on adult
1 |4 V, ~ a. c/ m" r' ^& Ipenile length.10,11 Some reports suggest subnormal
2 o% X$ W T5 t* c, m4 qadult penile length, apparently because of downreg-8 x( `* c/ a3 N S( X4 R( v
ulation of androgen receptor number.10,12 However,
$ D# w5 P9 Y1 Q. l" d6 e, BSutherland et al13 did not find a correlation between
9 O" s# G* b* Y5 m7 |3 x+ {childhood testosterone exposure and reduced adult# {2 m9 x" G! l5 ~0 K3 _
penile length in clinical studies.+ w1 m/ x/ P0 ^* y h! e3 R. _
Nonetheless, we do not believe our patient is& {) z& s% [: H) ~1 U
going to experience any of the untoward effects from9 H. T; B6 L6 C/ Y4 n4 Q$ R
testosterone exposure as mentioned earlier because
; a+ Q3 J+ _# ]( Y$ Ythe exposure was not for a prolonged period of time.
) K% B+ [# ^2 M8 a: ^ }3 rAlthough the bone age was advanced at the time of' F. s$ Q, g; b8 K* {1 {/ |
diagnosis, the child had a normal growth velocity at* \% N$ j; Y* E# _( S' d+ t5 K
the follow-up visit. It is hoped that his final adult7 j7 a$ Y6 J. i7 F+ k9 Y
height will not be affected.% a2 R* x' U) ^
Although rarely reported, the widespread avail-! q, B$ ?. Y: c& e- D7 f
ability of androgen products in our society may
+ E( I" m& A0 Bindeed cause more virilization in male or female
& y+ n+ a4 W7 f/ b& {& o) ~& \children than one would realize. Exposure to andro-
+ V ?+ _: P# g/ z% w+ dgen products must be considered and specific ques-/ Y" \2 Q( r9 i$ s$ x
tioning about the use of a testosterone product or' Q+ Y! W, N% q% a+ U% d
gel should be asked of the family members during5 A! C! f, D. L) C
the evaluation of any children who present with vir-1 e4 B( K2 l& ]+ {
ilization or peripheral precocious puberty. The diag-
: G5 M$ G* ^, E, Cnosis can be established by just a few tests and by
& i0 b8 d, s. u, Aappropriate history. The inability to obtain such a& m5 n% H& g- `! x8 o
history, or failure to ask the specific questions, may# l6 y& f+ X; o6 ^: H$ T* L; N
result in extensive, unnecessary, and expensive+ Z- r, D5 P4 j P4 u( v! w, D
investigation. The primary care physician should be* t8 `/ j$ Y( V- L9 E* l
aware of this fact, because most of these children
2 t& j# K5 x* N0 v0 zmay initially present in their practice. The Physicians’/ w. q+ b/ F, K) z
Desk Reference and package insert should also put a8 A" t7 X- D1 L2 |$ _
warning about the virilizing effect on a male or' ]6 S( G8 ^& t" m C
female child who might come in contact with some-' `( k4 F( W" o5 F4 L
one using any of these products.
& _9 {4 v& H3 N1 B$ uReferences
% s( \% ~/ b3 g. @) W, N% H2 V% A. x1. Styne DM. The testes: disorder of sexual differentiation+ O7 i4 x, d1 W
and puberty in the male. In: Sperling MA, ed. Pediatric( B T `& \6 }
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
0 B/ ^( f2 ~/ S; H# A7 `3 m2002: 565-628.; T2 H7 R" v4 [9 k. l
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious0 }# I0 S& Z I1 i3 y+ @" d' r7 o
puberty in children with tumours of the suprasellar pineal |
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