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Sexual Precocity in a 16-Month-Old
) E* e; ` Y8 K1 }, y4 ?$ f; H* XBoy Induced by Indirect Topical* ~, p; @! o4 l1 |1 r$ j$ Y2 Z
Exposure to Testosterone7 O/ N# }. v# n* V4 c
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2# C% B, Y* x; Q, b/ I" @
and Kenneth R. Rettig, MD1
' {! Z; `! f1 x7 s8 zClinical Pediatrics
2 b, E. ]" _5 D9 O' w# c3 iVolume 46 Number 6
% p! x! G! Z% j" p! _ Y! gJuly 2007 540-543. A" U6 n9 t" _' |
© 2007 Sage Publications
8 `7 Y/ g$ l4 \2 D% X, x: ~3 Y10.1177/0009922806296651
- f9 R% X. N# z6 C, dhttp://clp.sagepub.com
0 h' j; d; X8 {: a4 Rhosted at
* `/ M. T2 k1 Q; D% Chttp://online.sagepub.com) I" p8 W' r- n
Precocious puberty in boys, central or peripheral,8 t1 x0 c! ?4 T6 @, d+ I
is a significant concern for physicians. Central
$ y: Z! P, R& o" T' Uprecocious puberty (CPP), which is mediated! [, G6 P* x2 L& g0 e* X( e& h
through the hypothalamic pituitary gonadal axis, has
; n, o( s( n6 f9 \& {a higher incidence of organic central nervous system
t6 k0 f7 Z! Y. {2 U# rlesions in boys.1,2 Virilization in boys, as manifested6 T& H6 A' t7 W* x) e
by enlargement of the penis, development of pubic' J5 D" F1 T7 \8 Y
hair, and facial acne without enlargement of testi-1 M0 {7 X; b( J) l$ Z! A( k
cles, suggests peripheral or pseudopuberty.1-3 We, P7 @: G' I: W& E
report a 16-month-old boy who presented with the
& e; E P; H8 z. N1 w8 p" e" Penlargement of the phallus and pubic hair develop-
* `; @" @6 K/ X' E' Cment without testicular enlargement, which was due; X7 Q1 _- {( y2 T
to the unintentional exposure to androgen gel used by& S3 O( A3 r' W( B2 z- M3 N$ k
the father. The family initially concealed this infor-8 G- \3 H- x b: ]
mation, resulting in an extensive work-up for this
) z$ J, Y. u0 Q" }child. Given the widespread and easy availability of
0 F4 |0 T; \9 B7 j6 q; x& Etestosterone gel and cream, we believe this is proba-! \" i! z$ _* I/ P! X
bly more common than the rare case report in the0 s2 N6 \1 q' X! X+ W+ i
literature.4
]- l' Y3 a( q. hPatient Report
$ L" ]7 z! v* GA 16-month-old white child was referred to the0 J2 |- _3 j! Z. N" r+ A" L
endocrine clinic by his pediatrician with the concern4 ]1 H. M6 ]1 ?7 E D i! G r
of early sexual development. His mother noticed+ c6 i. C& D2 y& O: j( u
light colored pubic hair development when he was3 I$ j" J3 z0 A" F! x
From the 1Division of Pediatric Endocrinology, 2University of
! J+ L, U5 l1 E! d' USouth Alabama Medical Center, Mobile, Alabama.' \: g9 f% F" a6 a" G
Address correspondence to: Samar K. Bhowmick, MD, FACE,' U; ], H9 r: f2 w! P( |# H
Professor of Pediatrics, University of South Alabama, College of
r8 P% j; m2 w9 n2 @6 eMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;$ H5 d0 A" l" r/ J) d
e-mail: [email protected].; E1 W- Z! N5 L$ v" `6 g! Y: x
about 6 to 7 months old, which progressively became
1 q: D7 S: _: C$ Mdarker. She was also concerned about the enlarge-
7 \/ h; b% n Ument of his penis and frequent erections. The child0 o+ ^5 N. w3 C, k: D. q
was the product of a full-term normal delivery, with8 y" a$ ` M2 H P
a birth weight of 7 lb 14 oz, and birth length of
2 Y% {( x4 ~, q/ e0 p2 Y20 inches. He was breast-fed throughout the first year! o" q: | v( {2 U9 q
of life and was still receiving breast milk along with
- ^* z) @2 a( Msolid food. He had no hospitalizations or surgery,; H# o' @6 P9 l# F# Z( a' {/ e
and his psychosocial and psychomotor development
\% q6 N C' Rwas age appropriate.
* A- l* T: w( {' E3 \The family history was remarkable for the father,
p% D5 o9 f! M8 P3 owho was diagnosed with hypothyroidism at age 16,4 @# C1 ~* t( @8 `% ~
which was treated with thyroxine. The father’s
- ?2 i& O/ |# _ }# ]height was 6 feet, and he went through a somewhat: J. F5 l; d2 t
early puberty and had stopped growing by age 14.
1 x! _5 E5 V& k. |) s1 p- tThe father denied taking any other medication. The
6 X, q5 F1 ?* m0 M4 o: h, Cchild’s mother was in good health. Her menarche3 M' G3 v) m% j3 e7 f2 |! A
was at 11 years of age, and her height was at 5 feet: s/ |$ j7 J5 {: Q" E" S9 T
5 inches. There was no other family history of pre-
# v5 c5 L" ?- `7 P+ K; @cocious sexual development in the first-degree rela-
7 r0 g6 d7 [' J \. Mtives. There were no siblings.
2 W0 M& L3 S+ ^- N( T0 |) SPhysical Examination6 H9 n+ }: V4 R A: S
The physical examination revealed a very active,
" \$ u6 i5 r% P7 A: L7 b4 G% Q2 xplayful, and healthy boy. The vital signs documented$ h/ ^: |9 k9 c: E6 ^/ A% P
a blood pressure of 85/50 mm Hg, his length was
: L I7 D9 j/ H; M P9 O Z% Y0 n, \! [90 cm (>97th percentile), and his weight was 14.4 kg- m, k" P+ M( A7 V3 F
(also >97th percentile). The observed yearly growth V& q/ E3 J+ v# {5 l
velocity was 30 cm (12 inches). The examination of/ x9 x* k! e$ E* M, @) ]
the neck revealed no thyroid enlargement.! A# X. i% \/ L/ m( ]% g
The genitourinary examination was remarkable for& C) m: B' [6 M! _
enlargement of the penis, with a stretched length of
3 S' A6 i; `; F% A* ^$ S8 cm and a width of 2 cm. The glans penis was very well
) w. I8 M0 ~( s8 {' Fdeveloped. The pubic hair was Tanner II, mostly around9 L/ _; f$ [( b. I2 Z
540
( v n- b# q, O4 H% ^ Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 d! @$ i' l4 E: ]% v6 c% m3 x
the base of the phallus and was dark and curled. The
8 J' T1 u& y3 Dtesticular volume was prepubertal at 2 mL each.! ?! C# I N! O: P% Z
The skin was moist and smooth and somewhat! U8 X W1 i* W0 K5 I3 y3 n) t8 U
oily. No axillary hair was noted. There were no$ h% i0 l9 ~' J9 h+ R
abnormal skin pigmentations or café-au-lait spots.5 a% v- h. n3 H
Neurologic evaluation showed deep tendon reflex 2+
& W: ?% }" I4 i* [! [bilateral and symmetrical. There was no suggestion
' x, {9 {, m' |1 j6 Nof papilledema.
' _8 p# j; o$ ~. V9 o: v4 gLaboratory Evaluation; Y3 {1 u, P3 _
The bone age was consistent with 28 months by
# }7 I4 D: L2 N/ b ^using the standard of Greulich and Pyle at a chrono-$ r. `) r m1 h! j* L
logic age of 16 months (advanced).5 Chromosomal8 D; `/ \/ ?& d# D4 A: _
karyotype was 46XY. The thyroid function test1 c4 a$ H" W5 l/ D, G
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
% J- ?+ s( ]6 s/ a3 ~: c; F8 q5 P clating hormone level was 1.3 µIU/mL (both normal).. n- I" A# C5 @ v/ R
The concentrations of serum electrolytes, blood
1 `$ G) m* Q1 l$ _# F( A6 Kurea nitrogen, creatinine, and calcium all were# r9 A6 S- T# p' f) {3 T+ V
within normal range for his age. The concentration1 c! ~9 `6 ~. s( p
of serum 17-hydroxyprogesterone was 16 ng/dL
% `2 b% y; X, T7 F6 c(normal, 3 to 90 ng/dL), androstenedione was 209 m+ X, W: v, l l( Q
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
* ?; t; _ t' O' Y5 ?- [/ Hterone was 38 ng/dL (normal, 50 to 760 ng/dL),+ l8 [$ ~6 b. E& _- j9 g
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
1 _9 d" [3 M4 O0 R% I" M& q4 J49ng/dL), 11-desoxycortisol (specific compound S)5 {! ~# v* n! s6 _- t/ [8 S
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
3 I; l( C: F# ~6 o$ ^ j" q2 Otisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 V) `7 }! E/ g8 b* Otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
6 R+ C7 g- S# P4 ~8 k: R$ ^0 sand β-human chorionic gonadotropin was less than
. b0 c( ?; m' C# @: G; z5 mIU/mL (normal <5 mIU/mL). Serum follicular
# V+ l' c7 R4 I( n1 z# O, ustimulating hormone and leuteinizing hormone8 K _2 ?/ e& }
concentrations were less than 0.05 mIU/mL( h. @, @3 \& t. c2 _) S
(prepubertal).
5 @4 w% l! l H3 ?* MThe parents were notified about the laboratory
% x0 ^& U2 ?& M, M1 tresults and were informed that all of the tests were
, G% H7 {8 L7 d& N5 `1 l; lnormal except the testosterone level was high. The
; P4 [1 T$ E( ]/ n. }; ffollow-up visit was arranged within a few weeks to8 ^6 F3 m+ `! A* p
obtain testicular and abdominal sonograms; how-+ S, A7 N: N# ^$ ?5 w, o
ever, the family did not return for 4 months.
# a) s3 p3 d$ `4 Z" KPhysical examination at this time revealed that the5 E D* M; d% x% V' T- o
child had grown 2.5 cm in 4 months and had gained/ V: u# t! R* D R9 g. U
2 kg of weight. Physical examination remained
" R, n* [# P$ ~7 ~1 ~6 }, l+ H' ^unchanged. Surprisingly, the pubic hair almost com-
) O& x; J( }* H3 _pletely disappeared except for a few vellous hairs at& [% Y) i/ U% n
the base of the phallus. Testicular volume was still 2
+ |5 ?+ h( P# ]) umL, and the size of the penis remained unchanged.. ]* Q7 ~* \7 F3 \' E' [0 j6 S
The mother also said that the boy was no longer hav-
9 L% r# C2 p9 R: k b: H% N5 R hing frequent erections.# \7 O1 g p/ v6 A; n* L
Both parents were again questioned about use of
$ u; X% _" w' M# Iany ointment/creams that they may have applied to
" Q8 ^( G ?4 a& a: u& Ithe child’s skin. This time the father admitted the, i, E3 T: K: b; i# z6 B( T) O3 u
Topical Testosterone Exposure / Bhowmick et al 541) q1 Q% L; C4 O7 l( t; v; T7 C- b/ k
use of testosterone gel twice daily that he was apply-
& o. O: |" Y- ?; }' ]ing over his own shoulders, chest, and back area for- V: s6 V a( \2 S; `) I
a year. The father also revealed he was embarrassed. ]! i/ {. o+ E! y1 m
to disclose that he was using a testosterone gel pre-
! R+ Q% U% K" h* Lscribed by his family physician for decreased libido3 J4 J5 Q1 [ ]: O# }
secondary to depression.
$ }, Y( v+ d! r& r2 @4 \) bThe child slept in the same bed with parents.
- W- z' R) L+ O# H- t# i5 d/ vThe father would hug the baby and hold him on his
8 ^3 G) k/ k( l% D" Q: ?7 v. zchest for a considerable period of time, causing sig-, k: Q7 A& A" r. O. t5 G
nificant bare skin contact between baby and father.
, l* _+ O( V9 x+ J9 UThe father also admitted that after the phone call,6 X) Q3 _( L3 M0 w/ X
when he learned the testosterone level in the baby/ E0 p" q5 m0 c j. y
was high, he then read the product information
9 ^5 Y6 y: l2 y' r! a9 T0 k W9 gpacket and concluded that it was most likely the rea-
& }0 Z. K/ _0 Bson for the child’s virilization. At that time, they
' G9 @4 k, y3 B* cdecided to put the baby in a separate bed, and the
R* w' w+ w, ?5 ~7 Vfather was not hugging him with bare skin and had! i+ T) Y V4 r) a. Y# c, }; @/ r
been using protective clothing. A repeat testosterone' ]- x8 O+ ?( Y- {5 D
test was ordered, but the family did not go to the- N* H2 u& f6 O: I
laboratory to obtain the test.: r5 Z6 P7 ^5 A1 d$ T7 @2 k
Discussion) j' X ?& |0 p" b# g8 V- m7 g$ E
Precocious puberty in boys is defined as secondary
3 R' _) ~3 m, G. O2 N' O) nsexual development before 9 years of age.1,4
. j( c6 R" Q: }/ C0 \Precocious puberty is termed as central (true) when
5 C! j0 s* n' F5 Tit is caused by the premature activation of hypo-
) Z- Q: x5 k, u* J0 f, rthalamic pituitary gonadal axis. CPP is more com-
5 {7 |7 P6 w3 y' e6 N2 Pmon in girls than in boys.1,3 Most boys with CPP
, {6 B) V0 r; r qmay have a central nervous system lesion that is
7 e: o8 C2 t) k( g+ z" vresponsible for the early activation of the hypothal-
. c! h) I |6 d- L& \) W% E+ aamic pituitary gonadal axis.1-3 Thus, greater empha-
$ p( W5 _# C8 C8 jsis has been given to neuroradiologic imaging in3 Q+ u$ ]$ o" V
boys with precocious puberty. In addition to viril-
% V7 [, L# ?$ C4 a9 |& iization, the clinical hallmark of CPP is the symmet-
0 l4 {+ p/ K, q4 [" w9 ?& zrical testicular growth secondary to stimulation by4 ?5 o+ s0 i, n0 c2 [) M: F( D
gonadotropins.1,3! \5 b/ L' y" _% {* `
Gonadotropin-independent peripheral preco-7 r5 u, v: H. J3 o
cious puberty in boys also results from inappropriate
* V) W. {8 l& B+ F' q$ ~6 l/ R3 Tandrogenic stimulation from either endogenous or; Q8 {* U I7 w+ _
exogenous sources, nonpituitary gonadotropin stim-# u- d; U, G* S6 O6 R m
ulation, and rare activating mutations.3 Virilizing
. c9 \: p; m& K" v# Acongenital adrenal hyperplasia producing excessive9 }7 R( n' D8 c- D! D) x
adrenal androgens is a common cause of precocious
- Q9 V' q+ j2 V+ o7 m2 @# @puberty in boys.3,4% \1 ~) m3 H5 ?
The most common form of congenital adrenal/ k! K: r$ Z2 s, s$ H4 x U
hyperplasia is the 21-hydroxylase enzyme deficiency.8 _: g0 y' \2 K5 y' N
The 11-β hydroxylase deficiency may also result in4 B1 C$ v( w, `. j+ _
excessive adrenal androgen production, and rarely,8 ~( I2 s5 F- Q: h/ j
an adrenal tumor may also cause adrenal androgen6 y! h4 w# h0 C2 `% V, G6 t1 N
excess.1,3
1 }/ o! O% K! zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, o" f, e, E! c( B& X542 Clinical Pediatrics / Vol. 46, No. 6, July 20078 }1 H0 m3 P0 \/ C+ k8 `
A unique entity of male-limited gonadotropin-
: P0 [/ x7 k; Y2 u% iindependent precocious puberty, which is also known
) V6 y+ m/ O) x8 Bas testotoxicosis, may cause precocious puberty at a
" \$ K3 m5 J% T1 [: xvery young age. The physical findings in these boys/ ^1 N) W( d' ~
with this disorder are full pubertal development,8 k. t7 ^; R5 r9 g0 k+ Z. }
including bilateral testicular growth, similar to boys$ P. _8 O) y7 V8 ^
with CPP. The gonadotropin levels in this disorder
! i: ~+ M# u' F- P* u* U# Gare suppressed to prepubertal levels and do not show
# S: {6 q3 l y- B& H! L% I$ ]8 Lpubertal response of gonadotropin after gonadotropin-
$ ^1 e+ r) z' b \releasing hormone stimulation. This is a sex-linked
+ ]- v5 Y# M" j( J# [5 L: Yautosomal dominant disorder that affects only
$ ^9 ]) P, r7 j8 ?males; therefore, other male members of the family
( ?) N3 b) `4 J! `. l3 nmay have similar precocious puberty.3
& e% _7 l! F1 f& b, HIn our patient, physical examination was incon-$ z% V% S+ a8 v$ Q$ w8 y2 i
sistent with true precocious puberty since his testi-
3 d$ e7 B) ]' }& ocles were prepubertal in size. However, testotoxicosis
4 j# s5 q. r+ a& q: {1 swas in the differential diagnosis because his father2 P3 H7 r" e3 i0 s! m- T
started puberty somewhat early, and occasionally,
2 y4 g- D* F; q9 }4 l3 b5 @testicular enlargement is not that evident in the) _+ b9 @6 X* s
beginning of this process.1 In the absence of a neg-1 ` N- Y( H, E5 H% b, ~
ative initial history of androgen exposure, our
8 Y0 H5 C& q% ^" l" g1 v1 Cbiggest concern was virilizing adrenal hyperplasia,
% ~) p( P" }. ?9 ?either 21-hydroxylase deficiency or 11-β hydroxylase
2 U& |7 |5 e* S O3 k, bdeficiency. Those diagnoses were excluded by find-5 ?7 B8 T8 b/ u- \8 D
ing the normal level of adrenal steroids.
2 I& m: s$ V0 qThe diagnosis of exogenous androgens was strongly; s* _) E; s% K Q R
suspected in a follow-up visit after 4 months because
. \ A4 O' w' c$ G9 Gthe physical examination revealed the complete disap-7 V/ }3 L' U7 c1 p+ j0 s) D
pearance of pubic hair, normal growth velocity, and# \: f! X" d2 n, N$ W/ \& O; o1 e
decreased erections. The father admitted using a testos-( \& A; j+ b3 [ H) Z( b
terone gel, which he concealed at first visit. He was
6 r+ i* ^1 f9 ^5 `/ F/ N& T7 Lusing it rather frequently, twice a day. The Physicians’
3 j& w( J9 W- f% tDesk Reference, or package insert of this product, gel or6 g9 ]2 N X9 M6 Y8 j5 x* M
cream, cautions about dermal testosterone transfer to3 g7 [; }3 i3 U1 v1 T
unprotected females through direct skin exposure.
% I7 K; O8 o. y2 R5 ^Serum testosterone level was found to be 2 times the
/ V7 `* Y2 Z! S* |% X- k' ?baseline value in those females who were exposed to
& c/ N" b5 Y& y0 w, I! g& k, heven 15 minutes of direct skin contact with their male
3 u3 S( o! n1 h- C: f+ p+ P- N7 Cpartners.6 However, when a shirt covered the applica-% N+ B* s- o: z8 r
tion site, this testosterone transfer was prevented.+ `) U* _7 B- C% Y, ]( {% B9 q$ V
Our patient’s testosterone level was 60 ng/mL,
' o: P1 b- Y% O2 u+ ]: qwhich was clearly high. Some studies suggest that
+ K$ \& ] k& }3 O/ Mdermal conversion of testosterone to dihydrotestos-
+ l& A4 @; t: o- E2 |terone, which is a more potent metabolite, is more/ n9 X! m6 a" o
active in young children exposed to testosterone' b4 R8 X4 C X; x+ W
exogenously7; however, we did not measure a dihy-8 B1 r7 ?! W0 F8 k" z$ b# ]. g
drotestosterone level in our patient. In addition to- m; w% ~7 V' i2 j
virilization, exposure to exogenous testosterone in
+ u. a7 L# G+ T3 P/ Vchildren results in an increase in growth velocity and
$ f1 ]5 t" E- b* p. Sadvanced bone age, as seen in our patient.3 y/ G8 I) ^: |& J6 H
The long-term effect of androgen exposure during0 B( q6 v7 n/ {4 q0 e. R1 z
early childhood on pubertal development and final2 n& \1 O" k, f0 E) }
adult height are not fully known and always remain
- {3 }( W2 x% Y: Q: }: q- T2 G0 R2 Wa concern. Children treated with short-term testos-
1 [) u0 g' S) o7 h5 @terone injection or topical androgen may exhibit some$ K2 C- {0 g u$ n0 x
acceleration of the skeletal maturation; however, after
( x% z* m' Z( f5 X/ _cessation of treatment, the rate of bone maturation( ~- n. |7 H6 t# g0 f
decelerates and gradually returns to normal.8,9
( q$ c1 k# t- a* OThere are conflicting reports and controversy+ {* E! p0 e a7 b
over the effect of early androgen exposure on adult
5 G0 f; v; ? T1 ^$ {& @- qpenile length.10,11 Some reports suggest subnormal9 l7 ^8 k- W! M: p
adult penile length, apparently because of downreg-
6 C: y' R# [" e+ ]ulation of androgen receptor number.10,12 However,. R$ s& z! P$ z) x; z3 \. X
Sutherland et al13 did not find a correlation between
9 w0 Q5 n" B6 d: d, q# E" pchildhood testosterone exposure and reduced adult
4 F1 Q. p7 x- u& qpenile length in clinical studies.& b2 y& N' f( a( ]# `
Nonetheless, we do not believe our patient is) p, a x, `/ C5 ~
going to experience any of the untoward effects from
/ v8 s5 l. `4 }testosterone exposure as mentioned earlier because' x) B' Y4 z5 t3 ^; H( l$ _9 ~
the exposure was not for a prolonged period of time.
2 c+ z" x, O, z% {- X; t. `Although the bone age was advanced at the time of+ I% ?- }8 _- g) \4 C+ e
diagnosis, the child had a normal growth velocity at
/ Z) R7 E9 [5 F4 u3 ^2 Uthe follow-up visit. It is hoped that his final adult
" f; Z$ ]/ s( R, W6 ]height will not be affected.3 g! A' ~2 ^6 k# b8 d& `" x
Although rarely reported, the widespread avail-. T: F- U, L2 {. M
ability of androgen products in our society may, G8 k8 y+ A: L% c: [" P
indeed cause more virilization in male or female
( u' N! Z1 x' S% L Q, Rchildren than one would realize. Exposure to andro-
1 y! s& _ A' A9 I+ x- O, V& x8 Sgen products must be considered and specific ques-
6 q6 d! A% p$ d# ~: Y5 Stioning about the use of a testosterone product or
0 m/ _5 y7 ]7 jgel should be asked of the family members during
4 K+ y, T) I/ I" w3 Zthe evaluation of any children who present with vir-
; o5 Y( J b+ eilization or peripheral precocious puberty. The diag-+ p4 w1 z9 ]. j
nosis can be established by just a few tests and by
; J2 A* y( v' X/ d) Iappropriate history. The inability to obtain such a& o! P9 r" Z7 O3 \3 T! s5 O
history, or failure to ask the specific questions, may, E( {/ V* q( K6 m3 s
result in extensive, unnecessary, and expensive) g4 k0 o# j+ ^, f3 i& _
investigation. The primary care physician should be7 w8 m3 `. Y5 p: z+ q' W- i6 X9 I) J
aware of this fact, because most of these children
. D; x. z- M/ D9 b# Gmay initially present in their practice. The Physicians’+ s1 k5 L( W! k+ z; W' U h
Desk Reference and package insert should also put a
. k5 b( A- T$ W. J* b3 xwarning about the virilizing effect on a male or
0 U: L6 C4 C- w$ ufemale child who might come in contact with some- m2 L( V0 l. Q* q2 u, B6 K( e
one using any of these products., v9 V# j, F1 M( Z" M
References# Z7 _% O" q8 A0 O+ P. N% t
1. Styne DM. The testes: disorder of sexual differentiation
4 R7 x! L+ P$ [: c7 N) x; z- P8 S! Cand puberty in the male. In: Sperling MA, ed. Pediatric% L; n& n+ G) w' j
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;* M) E) r, |% j9 }8 w [ P% C2 Y
2002: 565-628.- l1 J) w" z3 z5 X
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious0 r3 |. Y; j+ |) `
puberty in children with tumours of the suprasellar pineal |
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