- 註冊時間
- 2023-5-6
- 精華
- 在線時間
- 小時
- 米币
-
- 最後登錄
- 1970-1-1
累計簽到:5 天 連續簽到:1 天
|
發表於 2025-1-4 03:25:35
|
顯示全部樓層
Sexual Precocity in a 16-Month-Old, o. Q7 y* n. ^7 t o2 S
Boy Induced by Indirect Topical! { ^6 R* W1 Q5 q4 }
Exposure to Testosterone
@* N& u' g- U) T$ s3 K: o6 K& a) LSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
5 m$ n$ F% t4 wand Kenneth R. Rettig, MD12 T/ L' k5 h: p6 o) J+ i) W3 ^
Clinical Pediatrics
* v7 \1 S) ^8 |4 D6 m5 _8 q: g3 oVolume 46 Number 66 r8 ]$ H7 t8 \4 _
July 2007 540-5430 t; u5 Z/ b; _ l
© 2007 Sage Publications. ]% [6 n: Z$ y7 D2 I; I! h
10.1177/0009922806296651
+ p6 l, t" u& e! q, P5 |, s4 | I$ U5 vhttp://clp.sagepub.com/ B$ k: I8 e: } D" P
hosted at. U9 l& r1 V/ C" S4 H# B1 O
http://online.sagepub.com o3 g2 O8 k$ @
Precocious puberty in boys, central or peripheral,
' i" t0 @; {1 J+ pis a significant concern for physicians. Central
3 K" b6 c @, H3 I) L& C; Lprecocious puberty (CPP), which is mediated8 w, i: T: g; O! p
through the hypothalamic pituitary gonadal axis, has
* V) O B9 U+ b! m2 Ia higher incidence of organic central nervous system1 [ {: V) v* b) l( b' t
lesions in boys.1,2 Virilization in boys, as manifested9 T. _, v: ?% a% W0 R) k
by enlargement of the penis, development of pubic
9 w2 \9 ?1 K* Q& o, ~hair, and facial acne without enlargement of testi-
9 r* P1 Q1 h# }& ~6 ycles, suggests peripheral or pseudopuberty.1-3 We
2 p% F* c) u3 F! U8 ]: N3 Nreport a 16-month-old boy who presented with the B, J" K" n# P2 N! U$ X5 A
enlargement of the phallus and pubic hair develop-
: ?- z- S9 a2 H5 R- L- Y( {ment without testicular enlargement, which was due
- O$ q/ T3 i) s2 S; o1 X5 O8 {# Wto the unintentional exposure to androgen gel used by
; ?) a5 x' I4 k- H; ~2 w; C: Jthe father. The family initially concealed this infor-4 Z8 b5 ?4 e) T, N
mation, resulting in an extensive work-up for this* w7 w# l# B5 ]+ s2 n
child. Given the widespread and easy availability of
. E) {6 Y" W" N0 B- v# etestosterone gel and cream, we believe this is proba-
+ I) S5 `( S4 ?: w4 {6 \- fbly more common than the rare case report in the
) q" S3 C" E) O- G5 \6 z, eliterature.4
0 f2 W0 p* G* ~( Y. [' tPatient Report6 q" h/ u/ D/ V1 H& I$ F
A 16-month-old white child was referred to the( f- l# E/ [3 I% L% s/ }0 s
endocrine clinic by his pediatrician with the concern
, l! I/ e: u' l; ~% X4 M# {* H- kof early sexual development. His mother noticed
7 q z. M V+ _1 P# s, xlight colored pubic hair development when he was
/ q1 `+ N2 b* U) q! U) }+ XFrom the 1Division of Pediatric Endocrinology, 2University of
+ |# K0 M. F& u, y4 j/ N; w! FSouth Alabama Medical Center, Mobile, Alabama.$ k3 A; m) n1 d& q+ @7 ?
Address correspondence to: Samar K. Bhowmick, MD, FACE,
2 d! s7 n. n; y0 g1 e1 W" zProfessor of Pediatrics, University of South Alabama, College of
8 c1 M ^! U$ e' w& x% C. \Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;$ G( u+ q) ?+ V- b( R+ z
e-mail: [email protected].$ Q! e# d, |( {0 b( V
about 6 to 7 months old, which progressively became2 \" g- _2 Y% O9 a
darker. She was also concerned about the enlarge-
! W+ P0 J$ V0 U; T4 I/ A' O# D6 ^ment of his penis and frequent erections. The child3 c4 x' N8 C# U, O8 o' N, _- S
was the product of a full-term normal delivery, with/ u4 N* t3 y# C9 S2 u
a birth weight of 7 lb 14 oz, and birth length of
9 u/ L0 O1 S; K% k- t20 inches. He was breast-fed throughout the first year9 V* M6 I9 y6 j- J3 R: K6 t
of life and was still receiving breast milk along with
; i* X9 K8 \( E: nsolid food. He had no hospitalizations or surgery,$ s( Y' W& D0 p) m$ ?2 H: v
and his psychosocial and psychomotor development
) L x0 ]2 p' bwas age appropriate.
) A" H2 N/ ]# q! ?) A3 |The family history was remarkable for the father,
9 f' i" c" y, |: R Ywho was diagnosed with hypothyroidism at age 16,/ T5 x! h) ^$ e* A* Y% c
which was treated with thyroxine. The father’s* O7 M: e# ~7 ?! X: Y) c
height was 6 feet, and he went through a somewhat
5 v' i# O+ i9 \( S Aearly puberty and had stopped growing by age 14.
7 ]$ F5 ?+ [* u, n8 V4 gThe father denied taking any other medication. The3 U% y5 q4 }7 r! S8 x
child’s mother was in good health. Her menarche
0 t. }" c8 p) B7 ~was at 11 years of age, and her height was at 5 feet
2 I+ R' [5 _. \) `8 Z; C! g5 inches. There was no other family history of pre-. k. M' B% ]7 @- I U" k4 y
cocious sexual development in the first-degree rela-
5 ]- M2 U, s" S( stives. There were no siblings.
# D8 C9 W. `2 K6 D; z2 |3 W. R' {Physical Examination) L" x; a m ^1 [9 S
The physical examination revealed a very active,
& ?( m: w! C. j! n+ o1 uplayful, and healthy boy. The vital signs documented
- M% V0 H; I' `0 d; o4 n/ oa blood pressure of 85/50 mm Hg, his length was
: H" K& q# s. M& n7 G90 cm (>97th percentile), and his weight was 14.4 kg/ u4 j! v0 \* L1 }- g( q1 M+ T; ]% ~
(also >97th percentile). The observed yearly growth
& G% c, v. Z8 v- Ovelocity was 30 cm (12 inches). The examination of' |" ?& j, y: w8 {) ^1 D) s
the neck revealed no thyroid enlargement.
( L: y! J2 }- @* b* o! nThe genitourinary examination was remarkable for
6 H! o1 W) f, b+ L' O$ M) t4 ? Denlargement of the penis, with a stretched length of" D/ d+ ]* c1 h
8 cm and a width of 2 cm. The glans penis was very well
" j' s& A. B) R6 S Edeveloped. The pubic hair was Tanner II, mostly around
% x8 ~8 p3 C$ s; J5404 i5 m% h' O8 ]1 t- w2 k* b
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from/ @/ I2 [2 j% K
the base of the phallus and was dark and curled. The
1 n( Z4 J7 m2 A5 H, j4 \testicular volume was prepubertal at 2 mL each.( H, e0 {: ?' F5 e2 S; d5 x, Y' m5 w u
The skin was moist and smooth and somewhat
( d+ o/ | y8 I9 V8 g$ M8 o- Foily. No axillary hair was noted. There were no, D' j) E2 B: B3 ~; T
abnormal skin pigmentations or café-au-lait spots.
4 E( f/ M- v6 NNeurologic evaluation showed deep tendon reflex 2+
" `3 ^5 L, w2 J5 ~$ i% d% y& i& Rbilateral and symmetrical. There was no suggestion
4 n! `# U C" E5 |; E) Rof papilledema.
0 }7 D& @4 ^7 k8 F1 jLaboratory Evaluation
" I% R5 u: B% P/ T D2 y' h% CThe bone age was consistent with 28 months by% j B3 q# x2 g: `0 l! S5 v
using the standard of Greulich and Pyle at a chrono-
* q5 H4 L+ W3 b5 alogic age of 16 months (advanced).5 Chromosomal2 s* z( G* F, c9 P7 \; {, b
karyotype was 46XY. The thyroid function test8 g" P& V! p5 j
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
, D) y6 Z& P2 Flating hormone level was 1.3 µIU/mL (both normal).
( a, N8 d! z. ~3 N: d7 b3 wThe concentrations of serum electrolytes, blood% L0 M/ c1 |8 k; k2 y0 b
urea nitrogen, creatinine, and calcium all were
5 Y# T1 e: B2 n! a6 Kwithin normal range for his age. The concentration) f& F9 V9 W* n4 E' n; j
of serum 17-hydroxyprogesterone was 16 ng/dL L! B1 ~' {' H5 `' |# e
(normal, 3 to 90 ng/dL), androstenedione was 201 \. B9 M7 N2 v' T1 L1 @: o/ Q+ k
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& E4 C: M; t' u1 a( d' Sterone was 38 ng/dL (normal, 50 to 760 ng/dL),- _4 u8 r# n9 V! x @
desoxycorticosterone was 4.3 ng/dL (normal, 7 to+ {$ }) ]3 R0 {7 i/ j, d; Z, P
49ng/dL), 11-desoxycortisol (specific compound S)4 ^! L. h3 E8 A3 i) ~6 g8 b8 u
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
; f A- t9 o* b+ v: Dtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
* g$ x" z/ J8 Stestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
4 i- j! ]7 P0 z. xand β-human chorionic gonadotropin was less than
/ q. H# Q& E w9 S& A5 mIU/mL (normal <5 mIU/mL). Serum follicular2 j& a* c$ o6 e) ]) Z
stimulating hormone and leuteinizing hormone0 }, V, [6 S2 m1 [
concentrations were less than 0.05 mIU/mL
6 ^4 T" `3 c7 @7 i(prepubertal).8 ?' N8 ^* F+ X& v
The parents were notified about the laboratory; H# R/ m/ q) K) p! |5 n
results and were informed that all of the tests were
2 t5 ^9 g5 o l g0 enormal except the testosterone level was high. The
9 P0 I( N0 o. o! d5 }' r }- h. t& Dfollow-up visit was arranged within a few weeks to& `7 I+ y8 \( B
obtain testicular and abdominal sonograms; how-
+ X9 B( E5 Z8 U1 Oever, the family did not return for 4 months.
3 ^7 C; N; w2 r9 U: CPhysical examination at this time revealed that the
6 P7 ~( U! _0 K9 n; ?child had grown 2.5 cm in 4 months and had gained
6 I1 v9 H. c8 d) [2 kg of weight. Physical examination remained
* A" h7 ]& ?; Lunchanged. Surprisingly, the pubic hair almost com-% ]- u7 Y& o+ O1 B l$ V+ D
pletely disappeared except for a few vellous hairs at
7 R, d8 r" y1 a1 M1 |: D# pthe base of the phallus. Testicular volume was still 2" |' e( I3 l& u$ O+ `3 g
mL, and the size of the penis remained unchanged.7 [/ L$ c& A) G( }
The mother also said that the boy was no longer hav-% s& }4 o2 g3 W8 I$ N- K
ing frequent erections.
6 m; f2 ]8 S; w* B( A) @Both parents were again questioned about use of
" D; |8 ]" i- x0 H# U% ^) Q/ C: many ointment/creams that they may have applied to
- z) J# w5 G/ D9 a) Hthe child’s skin. This time the father admitted the
2 M: p D1 `2 e( O/ c8 mTopical Testosterone Exposure / Bhowmick et al 541' M. e% J/ G( a" ~3 X2 R. w
use of testosterone gel twice daily that he was apply-
% y V" A) F4 l' J, `& A3 ming over his own shoulders, chest, and back area for
/ K/ ?' q- E2 Wa year. The father also revealed he was embarrassed
9 a5 [0 B. @1 M/ A, Bto disclose that he was using a testosterone gel pre-6 k2 a8 Z: [) g/ Y. r- j
scribed by his family physician for decreased libido% [; |" @ n: l, N' Q2 L- }
secondary to depression.% X' {0 c% b5 ~* }4 a* R5 m! @: m
The child slept in the same bed with parents.
% V0 B* ?9 l: u6 `The father would hug the baby and hold him on his
+ }: o* ^5 @& ], K3 pchest for a considerable period of time, causing sig-: |+ \' k0 Y+ R# |7 T' t2 H v
nificant bare skin contact between baby and father.
5 M* s1 y; j3 FThe father also admitted that after the phone call," ?! l7 T! Q% L
when he learned the testosterone level in the baby
. Q! U" e* B9 n- gwas high, he then read the product information
' L( N, F, R5 h5 g# Ppacket and concluded that it was most likely the rea-
! q5 k: `% ?" l! O+ Fson for the child’s virilization. At that time, they$ T% x7 M$ X6 s) ]$ }
decided to put the baby in a separate bed, and the& T: d8 d6 x( e) Y' j
father was not hugging him with bare skin and had' k- o4 d5 t7 p: s
been using protective clothing. A repeat testosterone
# r3 F0 X& a; n5 G& z$ c6 Q9 Otest was ordered, but the family did not go to the0 T: t# O: D* ~& z1 f) L4 I
laboratory to obtain the test.& I) P9 l; f- @/ u6 z5 v5 s* }
Discussion
2 n8 F, K9 u7 |* dPrecocious puberty in boys is defined as secondary
9 u* _* E" v& ?9 X4 r7 Tsexual development before 9 years of age.1,4: H. C* d* ]" O7 q7 G
Precocious puberty is termed as central (true) when
2 F; O& \0 A0 yit is caused by the premature activation of hypo-! c7 E& u+ I. P+ a5 F
thalamic pituitary gonadal axis. CPP is more com-
1 n# F: T4 ?: }. m. [: i. ^" Mmon in girls than in boys.1,3 Most boys with CPP
; s' t: { n* D: `* x5 I& Fmay have a central nervous system lesion that is
* D( t' S7 b( `responsible for the early activation of the hypothal-) E' t6 g3 V, A
amic pituitary gonadal axis.1-3 Thus, greater empha-
x7 B [) a3 tsis has been given to neuroradiologic imaging in
+ Z7 I# I! }6 r* zboys with precocious puberty. In addition to viril-0 n7 ^7 `, \" B3 Z
ization, the clinical hallmark of CPP is the symmet-8 T! C) F# `: I& W; X. H1 S% m6 A
rical testicular growth secondary to stimulation by+ z" b$ ~2 E4 d7 d4 _, b
gonadotropins.1,3
( ^9 k" _% Z, ^1 V7 RGonadotropin-independent peripheral preco- u* U l, w7 @
cious puberty in boys also results from inappropriate# c: E2 c' D* p# w' T/ r' N
androgenic stimulation from either endogenous or+ b; R* [4 k6 {' h( O. l9 k
exogenous sources, nonpituitary gonadotropin stim-! R6 C$ ?0 p- C: ]
ulation, and rare activating mutations.3 Virilizing
8 w' Q! e" w4 Econgenital adrenal hyperplasia producing excessive3 D4 H6 t2 J, f+ o/ O
adrenal androgens is a common cause of precocious; {; s( V5 {5 X; C3 b% K- r
puberty in boys.3,44 `' ^8 `/ v/ c! U9 h6 k# U
The most common form of congenital adrenal7 x% c' w& r1 W' E
hyperplasia is the 21-hydroxylase enzyme deficiency.# A( B5 Y) _. `
The 11-β hydroxylase deficiency may also result in. \/ z, x: S9 B1 k f
excessive adrenal androgen production, and rarely,
: P0 _$ }! d1 N% A- Jan adrenal tumor may also cause adrenal androgen
" r' W" I4 w/ m# P4 Cexcess.1,31 U9 O P& \ J& C/ s
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! u% @9 H/ E; g3 @" D
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
# F" [; H, P! ?# o, YA unique entity of male-limited gonadotropin-
& r0 K3 O# e& h V7 D0 @ B$ m6 zindependent precocious puberty, which is also known
3 Z# a2 E( I" \& R0 Y- X1 K0 @as testotoxicosis, may cause precocious puberty at a* @) L, |* x& ^* m8 R. x% q; k# O6 o
very young age. The physical findings in these boys
) o* b8 D8 e8 Y3 gwith this disorder are full pubertal development,
1 _. ^- K& a# q- yincluding bilateral testicular growth, similar to boys; E* v: Z4 U. ~4 S' K
with CPP. The gonadotropin levels in this disorder
& z+ \, V: S" i5 j- h3 F: Oare suppressed to prepubertal levels and do not show
# ?& o+ p: [9 B! o( z5 \# p: m4 Opubertal response of gonadotropin after gonadotropin-
* B' W- O3 d( N/ U; Lreleasing hormone stimulation. This is a sex-linked# e( |8 ?% N, ]$ r% E. ?
autosomal dominant disorder that affects only9 p0 D: D5 O- w, c
males; therefore, other male members of the family( x6 G( k! A* V2 x' I
may have similar precocious puberty.3
' z+ [* Y! k! L. Z! E1 P7 |/ cIn our patient, physical examination was incon-
+ L# v1 i: B! X, p. `sistent with true precocious puberty since his testi-( d5 e' S' L+ G0 o. |6 x& `% z" S( o* N
cles were prepubertal in size. However, testotoxicosis- G- p% Q8 f" P a; P% b
was in the differential diagnosis because his father2 Z4 h1 g: ~- d: i) g# a
started puberty somewhat early, and occasionally,
: L1 c, _/ Z4 G. k- A4 H0 B" itesticular enlargement is not that evident in the) u# U1 x- ?* _. N
beginning of this process.1 In the absence of a neg-% ?: J* Y. [# R/ z3 H& ^# C
ative initial history of androgen exposure, our3 [. X& P; {/ ^1 r% S
biggest concern was virilizing adrenal hyperplasia,
2 S& r. J; _0 u! beither 21-hydroxylase deficiency or 11-β hydroxylase- @+ X: H/ G( [' g' q C; Y
deficiency. Those diagnoses were excluded by find-
9 e; E' w! X& _3 {; n* Aing the normal level of adrenal steroids.4 Q" J* }% O, @, q' B5 c! [
The diagnosis of exogenous androgens was strongly
6 m, l/ G( u. \* Lsuspected in a follow-up visit after 4 months because- L, w. K- a6 C4 A' `1 V Q
the physical examination revealed the complete disap-; T0 U% c: _; [% y; m
pearance of pubic hair, normal growth velocity, and
$ B, g) e0 E7 S9 H5 w" `3 d* W& Udecreased erections. The father admitted using a testos-
`) _: U8 q6 V7 n5 B, Rterone gel, which he concealed at first visit. He was: ^5 C" H9 n. g+ `8 s1 l% g* D# p
using it rather frequently, twice a day. The Physicians’$ w& {; m8 W) @- l6 h0 P# L4 _
Desk Reference, or package insert of this product, gel or" p# q7 g' S. `; Y7 m2 W4 Q
cream, cautions about dermal testosterone transfer to% S" b, @ q2 v7 H& {, ~
unprotected females through direct skin exposure.% m# }, w( d0 @9 l- L
Serum testosterone level was found to be 2 times the
) j) K) T* T1 @baseline value in those females who were exposed to
6 _& s. x, _- _! Neven 15 minutes of direct skin contact with their male3 j( T9 ~! v0 ]& t. l
partners.6 However, when a shirt covered the applica- r; r' u' O0 g/ O( ?( g
tion site, this testosterone transfer was prevented.
1 L4 h# D* s. O" G% ^+ o6 aOur patient’s testosterone level was 60 ng/mL,- c7 H8 ~, ]% a- @+ b; S
which was clearly high. Some studies suggest that
6 F# q8 m8 E( w$ Ydermal conversion of testosterone to dihydrotestos-
& n+ k$ o+ Y* S: Lterone, which is a more potent metabolite, is more8 y* [% m7 j- A# t3 V1 `
active in young children exposed to testosterone) a1 i. ~. \' p j& N. \
exogenously7; however, we did not measure a dihy-
* M) a; i/ b6 r$ I) ydrotestosterone level in our patient. In addition to
' N7 _/ T8 ?2 A/ c: v' N) ]virilization, exposure to exogenous testosterone in
$ D% N; P$ K+ n7 @children results in an increase in growth velocity and
( `+ b3 \- `8 z1 Badvanced bone age, as seen in our patient.3 h. B; p7 |% o# l
The long-term effect of androgen exposure during( ~- G D* ?& z$ J( D
early childhood on pubertal development and final
: a+ ^1 x! o; Z, i: aadult height are not fully known and always remain
( x% `: E) b/ e$ t, p. o; Ha concern. Children treated with short-term testos-
; h6 V p: n( mterone injection or topical androgen may exhibit some
& A! t5 d5 d m6 [acceleration of the skeletal maturation; however, after
- |2 h' B$ `! l& e/ `cessation of treatment, the rate of bone maturation' i% U9 L4 ^9 `4 A& U$ G9 T
decelerates and gradually returns to normal.8,9
4 A. X" D3 n9 j8 K' h/ P6 {There are conflicting reports and controversy6 s8 u+ {+ e* o7 x4 V! l& J
over the effect of early androgen exposure on adult) s G/ n0 e8 p$ y$ i
penile length.10,11 Some reports suggest subnormal# B/ c e! O( T& o( L* W& X
adult penile length, apparently because of downreg-3 x& p. n0 K; y1 a
ulation of androgen receptor number.10,12 However,
" z9 Z, x0 \2 M5 @0 O1 `Sutherland et al13 did not find a correlation between, Y; k5 A' g8 L8 l
childhood testosterone exposure and reduced adult
; V1 O8 J% _0 M* ipenile length in clinical studies.
' }, Z u7 C. f! V1 |* s) _Nonetheless, we do not believe our patient is
1 X ], v* l- C5 U& C- `" i+ _% bgoing to experience any of the untoward effects from I% W( O: l) r. N9 E
testosterone exposure as mentioned earlier because
, N% @$ s: g1 q" zthe exposure was not for a prolonged period of time.
1 R8 t- T; \; U& Z' C& iAlthough the bone age was advanced at the time of
- \3 n) \) d0 K: ]7 p5 K9 E8 gdiagnosis, the child had a normal growth velocity at+ S/ G5 {' V5 F. B7 Q
the follow-up visit. It is hoped that his final adult
5 P% K' l2 X) [( k; `/ D" yheight will not be affected.. N' |% q; r& f1 F% v# v
Although rarely reported, the widespread avail-' h* M% X O" `+ p+ @
ability of androgen products in our society may; L6 U5 W" E3 R# ^& Q( o3 z
indeed cause more virilization in male or female! H4 r. z6 ^7 k: v/ l
children than one would realize. Exposure to andro-
p4 k( n* _/ J+ _gen products must be considered and specific ques-/ @* Q# H6 R7 r9 Z/ p+ ~9 {$ j
tioning about the use of a testosterone product or
/ V) d# e! _; ~$ G( bgel should be asked of the family members during
% R' j' \- {2 Q: _$ i# \the evaluation of any children who present with vir-
- R2 c! T1 \) G% Y# filization or peripheral precocious puberty. The diag-5 U; c2 R! y8 I" A
nosis can be established by just a few tests and by
# \" X9 P/ D1 Y0 r' Y, J; Z% Jappropriate history. The inability to obtain such a
0 y, l. t: t% g/ ~& jhistory, or failure to ask the specific questions, may
* g# @4 u6 ]# i R$ H' o/ A5 Yresult in extensive, unnecessary, and expensive8 j1 B: s: c5 h
investigation. The primary care physician should be
5 P& M& R: K; u! V6 taware of this fact, because most of these children% S+ Y1 u: o1 I7 |( o4 W2 ?& q
may initially present in their practice. The Physicians’
: G G9 T# f7 WDesk Reference and package insert should also put a
) U& \8 Z4 [1 H& b# r! G2 Dwarning about the virilizing effect on a male or
+ a4 J2 `$ _; ffemale child who might come in contact with some-3 o$ A+ }( q& o2 w! G- x0 _
one using any of these products." ^3 z4 s3 j k' {6 x6 }
References( A5 b/ Q4 R5 ~2 ^5 J* I1 c
1. Styne DM. The testes: disorder of sexual differentiation9 D2 Y2 I! b- Z o& Q$ y- `
and puberty in the male. In: Sperling MA, ed. Pediatric& n1 a9 f1 r& {, p6 M- o S2 ^
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
# V$ R: {! |2 F4 F2002: 565-628.0 N7 v! q* @/ G* c0 H5 b
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
/ d* K8 x5 o/ }. Upuberty in children with tumours of the suprasellar pineal |
|