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Sexual Precocity in a 16-Month-Old+ ?/ K; P( W( X$ R5 S) p' I+ ?
Boy Induced by Indirect Topical
$ H: _' {' |! iExposure to Testosterone
" j! R1 |0 c6 f8 ESamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2$ J, O6 s7 f9 f" B q. X
and Kenneth R. Rettig, MD19 S+ s1 _8 L7 J
Clinical Pediatrics2 c; ~- s0 Z3 M% m
Volume 46 Number 6: Z1 w. Z9 |0 W0 i4 U$ k
July 2007 540-5437 f: { O/ Y$ E! j# [
© 2007 Sage Publications
6 L; l: y. P: ^' i0 s9 x10.1177/0009922806296651
$ B# l* {& |2 p, G6 [+ uhttp://clp.sagepub.com6 x7 o/ Q' d+ t1 X2 w2 A
hosted at. s a& ~, Y1 R( E
http://online.sagepub.com( s$ M4 r; v: |+ d; p
Precocious puberty in boys, central or peripheral,% X! S$ `6 l( i$ b& u# } S ^
is a significant concern for physicians. Central
1 V$ e M2 f2 Kprecocious puberty (CPP), which is mediated
5 k; ~, k0 j, Bthrough the hypothalamic pituitary gonadal axis, has* \# S; @$ K! b6 C8 D3 t: E
a higher incidence of organic central nervous system
1 @: L9 b) b: Xlesions in boys.1,2 Virilization in boys, as manifested, s1 u# x% L: n" c! H! P4 Z' x( t$ f
by enlargement of the penis, development of pubic
, g1 P% q3 _. b) qhair, and facial acne without enlargement of testi-, L- j$ l# z$ P2 \4 G0 d
cles, suggests peripheral or pseudopuberty.1-3 We
3 Q1 U0 l( x; X$ i0 u5 I$ ~ Vreport a 16-month-old boy who presented with the
& ^0 }9 t% f5 T# l; w% `enlargement of the phallus and pubic hair develop-5 e( t; C% E. l
ment without testicular enlargement, which was due" w- j3 u p) J) V- f, C
to the unintentional exposure to androgen gel used by, d- s+ v% K3 w
the father. The family initially concealed this infor-; Y. ^0 C) |( }1 Z" G
mation, resulting in an extensive work-up for this2 O4 }( T4 H2 Q! I$ `% i( T5 G9 E
child. Given the widespread and easy availability of
' o. z: E2 e; Q' r; \( \testosterone gel and cream, we believe this is proba-* q, [! K0 q+ H( l! ^; h* k
bly more common than the rare case report in the
" M% c8 i. M; qliterature.4
, y8 i: O U4 t. k RPatient Report
( t, x% T) |& u% N7 uA 16-month-old white child was referred to the
3 k4 j# t! D2 W6 W" y& ~. ]# ]endocrine clinic by his pediatrician with the concern) c% c* W# v1 w- l* W5 V
of early sexual development. His mother noticed2 R5 Y/ z2 R" P. b, D
light colored pubic hair development when he was
& w) |; z% \' uFrom the 1Division of Pediatric Endocrinology, 2University of
; O1 y7 K; w2 Z1 p, v0 U7 USouth Alabama Medical Center, Mobile, Alabama.
. k' Z5 U* P+ N: s0 s: a+ V6 b$ _Address correspondence to: Samar K. Bhowmick, MD, FACE," Z* A9 n% N) R
Professor of Pediatrics, University of South Alabama, College of
& B: T u) D' x& r: a4 P( OMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
' p; g! T, ]( j b) o. \6 o1 |e-mail: [email protected].
) E( k1 [% \+ O2 q6 O0 L4 cabout 6 to 7 months old, which progressively became
0 P6 a0 B, l# }' G9 @, Wdarker. She was also concerned about the enlarge-
+ d7 ]/ R4 b5 J+ O" ^6 rment of his penis and frequent erections. The child4 F) v9 O) p8 B1 d
was the product of a full-term normal delivery, with
& Z- r' G: M: G5 Aa birth weight of 7 lb 14 oz, and birth length of
3 ]* ], u3 b5 \20 inches. He was breast-fed throughout the first year: _; w7 Z# `; c! v8 j3 B. D
of life and was still receiving breast milk along with6 E$ N* s$ V- Q |. f1 x4 d
solid food. He had no hospitalizations or surgery,
4 u* ? Z; R4 G z$ wand his psychosocial and psychomotor development
6 Y9 Y* A& [; C8 V' Xwas age appropriate.
" [6 l3 U7 ^9 @" a" g- F9 D' ]5 DThe family history was remarkable for the father,* G1 _7 J! m/ Q8 U- ]+ F9 A- X
who was diagnosed with hypothyroidism at age 16,
- _/ }( w, T3 _5 ?. Nwhich was treated with thyroxine. The father’s
, T# M. Q( d* Y! c. E& Vheight was 6 feet, and he went through a somewhat n" o/ l- j5 x5 h d1 r8 V
early puberty and had stopped growing by age 14.! u& k ~, X4 O; V
The father denied taking any other medication. The8 [0 ^) z G" G
child’s mother was in good health. Her menarche
- c0 }% N5 h" J4 @0 w$ {was at 11 years of age, and her height was at 5 feet* [; J, j% @* V: ^
5 inches. There was no other family history of pre-
4 ^; j. G& O0 Wcocious sexual development in the first-degree rela-
2 H" t0 r' u7 B$ @# ^- b; Q: ktives. There were no siblings.; x) ]4 Y5 Q+ L8 q% K. _
Physical Examination
( e0 w1 o# r0 F3 ]2 D' rThe physical examination revealed a very active,: F8 C4 l2 D ^4 J
playful, and healthy boy. The vital signs documented
7 V$ ?, S9 f( _, p( U3 y5 Ia blood pressure of 85/50 mm Hg, his length was0 U) n4 h! g2 j/ n6 Z
90 cm (>97th percentile), and his weight was 14.4 kg4 V# W1 ]6 ~8 } J
(also >97th percentile). The observed yearly growth
7 a4 p6 d R1 B. r( Hvelocity was 30 cm (12 inches). The examination of
7 m3 a! }# A" M. X$ l% Uthe neck revealed no thyroid enlargement.
" ]8 s4 p3 e5 w6 F2 |% ~" TThe genitourinary examination was remarkable for
9 f. }# M5 N. g" G" E1 q3 N2 Xenlargement of the penis, with a stretched length of& Y7 k5 N- d* M
8 cm and a width of 2 cm. The glans penis was very well6 S- s* }: i# x+ z& j- [ p4 j
developed. The pubic hair was Tanner II, mostly around: C- E' Q a: p
540) w% F3 [7 f5 E( U! f8 A! ?4 Z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* N q D/ O" p; ]
the base of the phallus and was dark and curled. The
& g7 Z, N7 d, @ n6 b4 ltesticular volume was prepubertal at 2 mL each.- r2 t+ `/ L, \0 X9 x2 T6 a" d
The skin was moist and smooth and somewhat
4 u5 h+ c1 ]# U$ |! \+ m( P9 P( c' zoily. No axillary hair was noted. There were no
, T7 Q) G- u' x. I9 e! X5 T4 _/ Jabnormal skin pigmentations or café-au-lait spots.8 V- M* I( Z9 B5 D
Neurologic evaluation showed deep tendon reflex 2+8 s# \" ?% B# ?4 L5 `1 g
bilateral and symmetrical. There was no suggestion
* p3 g3 H* N; t3 v; Sof papilledema.
" n% ]' v3 V* w( P7 _Laboratory Evaluation- s2 |- e" _" U, R3 `3 j( o
The bone age was consistent with 28 months by
h' O) b+ M. x* Qusing the standard of Greulich and Pyle at a chrono-$ I1 l! A6 y2 a% m0 B
logic age of 16 months (advanced).5 Chromosomal
6 q0 h# F# ~9 S0 B Lkaryotype was 46XY. The thyroid function test8 d. |; d' Q) w0 Z
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
* \1 H& S% m9 C3 X( alating hormone level was 1.3 µIU/mL (both normal).
" L. \4 W* B- pThe concentrations of serum electrolytes, blood
6 S1 G2 q5 f: i; q6 ^urea nitrogen, creatinine, and calcium all were6 z) S3 Y K* H$ U8 |; V# E
within normal range for his age. The concentration- @4 b3 b2 H' y$ q8 X: K5 @
of serum 17-hydroxyprogesterone was 16 ng/dL
! O% m" ?" K+ O(normal, 3 to 90 ng/dL), androstenedione was 20
r4 P: K* Y- ?9 ~0 J* y3 Y& Bng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-$ o, Y3 G. F. M4 I( }
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
! t2 b( N9 X% v; n3 q& ldesoxycorticosterone was 4.3 ng/dL (normal, 7 to4 X* V. U' p* ^1 [% V
49ng/dL), 11-desoxycortisol (specific compound S): n+ t8 h: c6 U- N! H0 ?
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
/ u! i+ c( d. a" atisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
3 o6 ^* z O4 L8 E5 `testosterone was 60 ng/dL (normal <3 to 10 ng/dL),$ K' B/ \# u- }
and β-human chorionic gonadotropin was less than% A8 ~- z: k8 H5 }
5 mIU/mL (normal <5 mIU/mL). Serum follicular7 _/ g: Z) U# V. N+ N$ ?
stimulating hormone and leuteinizing hormone
6 O. C' ?! _: s: M @& uconcentrations were less than 0.05 mIU/mL
, b* [% B9 y* ?! H; N4 Y(prepubertal).
4 I$ W7 g" X. X$ C$ \The parents were notified about the laboratory
* h t4 ^7 l0 hresults and were informed that all of the tests were
/ z( [8 _7 C! \+ E% `normal except the testosterone level was high. The
) u: X6 e" @+ d: Cfollow-up visit was arranged within a few weeks to
3 `' |- K g0 R) B* g7 Tobtain testicular and abdominal sonograms; how-
3 z/ Z1 d0 j5 u' Iever, the family did not return for 4 months.
6 {1 h0 i g6 [9 w! KPhysical examination at this time revealed that the
) a# ]& C6 C; N% w. Y+ |child had grown 2.5 cm in 4 months and had gained2 J" K b; |2 W8 Y3 g! H& _) s( e
2 kg of weight. Physical examination remained
6 G% c6 I9 x3 e% R, wunchanged. Surprisingly, the pubic hair almost com-- z- F/ S1 `2 C: Y, l
pletely disappeared except for a few vellous hairs at
$ E* V. `4 C+ P$ d' i. G: k' ithe base of the phallus. Testicular volume was still 28 h" p) ?3 M, ~7 V7 Y
mL, and the size of the penis remained unchanged.
& q6 @. B% k4 O3 LThe mother also said that the boy was no longer hav-' E, M9 |, ]! r# U% D5 H% w
ing frequent erections.
7 t6 P2 i4 S" v2 G3 P' G. w8 EBoth parents were again questioned about use of
( k% G% L+ Y+ W! |% O, {) nany ointment/creams that they may have applied to) B2 n; X& p% W8 j' i
the child’s skin. This time the father admitted the, ]6 I+ b) S1 V( e+ ^. X4 P# ^: v7 u- t
Topical Testosterone Exposure / Bhowmick et al 541$ ]- k$ M: u8 @* h
use of testosterone gel twice daily that he was apply-
. I# o: ]" b: x7 ]! c- Ring over his own shoulders, chest, and back area for5 u% N6 g& I2 }0 F! r
a year. The father also revealed he was embarrassed9 h% ~. I. A& M
to disclose that he was using a testosterone gel pre-( j+ T1 _8 a/ o8 {
scribed by his family physician for decreased libido
, w, L. L1 `1 h, s0 L7 U( Nsecondary to depression.
" o# b0 L! q. e) S ^/ A8 Y. UThe child slept in the same bed with parents.+ s% J3 T0 n6 F% j1 p% N: m& j
The father would hug the baby and hold him on his, J! b& N+ G* x0 {* A) N
chest for a considerable period of time, causing sig-
k3 b8 O$ l% L0 ynificant bare skin contact between baby and father.
. I1 h& L- x. I, k; V* NThe father also admitted that after the phone call,) g' \, _* G( G; \2 a; J: b$ e7 J
when he learned the testosterone level in the baby
8 T1 p' ?: G! ^+ ?5 R5 c- rwas high, he then read the product information, F0 Y3 q; J2 l7 b3 E* \1 A
packet and concluded that it was most likely the rea-0 C& l; j/ d; E5 x# H/ |
son for the child’s virilization. At that time, they; Y% Z5 x8 l5 f! k6 P+ b
decided to put the baby in a separate bed, and the
- u/ Y* c' f2 v) a$ y* D3 F2 [father was not hugging him with bare skin and had
: g$ ~0 E6 u% z" e/ ~been using protective clothing. A repeat testosterone5 e) R" m# v6 h" W" f, C
test was ordered, but the family did not go to the
8 O9 O4 i, F5 a2 C( v" ulaboratory to obtain the test.5 F* d' R8 z; [+ M3 }$ z d
Discussion
& d) c: @8 N/ l: V" ~ m a0 m" gPrecocious puberty in boys is defined as secondary
- t/ ^( ~% ]& vsexual development before 9 years of age.1,4
7 M7 k) W5 T' YPrecocious puberty is termed as central (true) when! N* U% w3 a0 g, t. m G
it is caused by the premature activation of hypo-. m/ n6 k' _( U' u) X
thalamic pituitary gonadal axis. CPP is more com-
( p5 }6 t+ |/ |. S6 i) M" K( _/ Jmon in girls than in boys.1,3 Most boys with CPP% b! u/ l; K4 Z( U/ I
may have a central nervous system lesion that is
2 n' m( s7 `9 U, G$ p, q" ?responsible for the early activation of the hypothal-
, M$ u$ u6 r6 l+ K! Famic pituitary gonadal axis.1-3 Thus, greater empha-
1 `4 B3 Y4 ~$ C0 z7 C2 @2 ~sis has been given to neuroradiologic imaging in+ Y8 B" v7 B" y3 N7 j! [6 X
boys with precocious puberty. In addition to viril-
4 c! Y; z: Z, ]ization, the clinical hallmark of CPP is the symmet-
1 c( x9 h5 Y/ n' yrical testicular growth secondary to stimulation by
% s1 ]$ R7 f3 X0 g, A5 C1 |, f: fgonadotropins.1,3; \2 W- i8 |% B
Gonadotropin-independent peripheral preco-
' D% d" q9 d8 ]' {( s7 s8 c: Hcious puberty in boys also results from inappropriate# N, E4 b6 K2 v0 c
androgenic stimulation from either endogenous or
4 F+ ?, L$ w- v0 z2 S9 u: Jexogenous sources, nonpituitary gonadotropin stim-
, N, b i0 y6 n7 e& x9 F5 oulation, and rare activating mutations.3 Virilizing, C, c2 m4 p+ r. c3 x c
congenital adrenal hyperplasia producing excessive- f! W& t/ w7 k& F7 J9 r
adrenal androgens is a common cause of precocious4 r( S. ~" I& A& v
puberty in boys.3,4
. l: |& @( J; A1 G+ R6 `9 S5 a/ EThe most common form of congenital adrenal
* I B. b* ]- N5 Y* W2 X7 Ihyperplasia is the 21-hydroxylase enzyme deficiency.1 r1 L3 h$ |/ e3 {, W
The 11-β hydroxylase deficiency may also result in0 V8 u5 @& L% |8 D5 D' q
excessive adrenal androgen production, and rarely,
; r: P- [" H: R, W8 U# ban adrenal tumor may also cause adrenal androgen) R+ I2 P5 B" `9 a8 ~. m
excess.1,3
4 L1 m1 A7 \0 i9 {7 Wat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
Y3 D: j, z' R542 Clinical Pediatrics / Vol. 46, No. 6, July 20074 ~5 ?& `, o9 o9 y I/ c) r
A unique entity of male-limited gonadotropin-. ^- f: X' ~2 M8 s' C
independent precocious puberty, which is also known5 h4 H7 w0 ?0 K! y
as testotoxicosis, may cause precocious puberty at a
. M$ d0 C; X: }4 D- dvery young age. The physical findings in these boys
" k/ O* t" W1 swith this disorder are full pubertal development,4 H! Y# k% f6 L. K! ?1 N
including bilateral testicular growth, similar to boys
2 |2 O6 r! Z$ W, `1 k5 Owith CPP. The gonadotropin levels in this disorder
2 z6 _" b1 R8 z Mare suppressed to prepubertal levels and do not show
7 z- ]2 n# u( A P1 E5 I E6 xpubertal response of gonadotropin after gonadotropin-. ~$ A+ X, q' d$ t v
releasing hormone stimulation. This is a sex-linked9 d3 o( @& q) @8 }' d9 `
autosomal dominant disorder that affects only
3 j x8 M% _# E, E. pmales; therefore, other male members of the family
! E/ `0 @$ {& I, L# e0 n1 w* ?may have similar precocious puberty.3
+ G) U3 y+ |& }2 p; u8 B$ R* uIn our patient, physical examination was incon-
9 y4 t) e; B2 L9 k/ }sistent with true precocious puberty since his testi-
' {0 O, W$ R Jcles were prepubertal in size. However, testotoxicosis
7 i! L6 w$ m% b) G9 w4 k. q5 P4 Rwas in the differential diagnosis because his father
" P/ T; a8 R7 }0 c2 g& y3 Y- ostarted puberty somewhat early, and occasionally,1 i6 `# p& z0 G$ Q/ y/ p( @
testicular enlargement is not that evident in the( A2 T- ~; M6 S
beginning of this process.1 In the absence of a neg-
( g! Y9 F. t' h! aative initial history of androgen exposure, our5 V( [+ {( o& p! k
biggest concern was virilizing adrenal hyperplasia,, [1 W7 t7 P0 L' P0 o7 Q
either 21-hydroxylase deficiency or 11-β hydroxylase
# x; c( F- O& wdeficiency. Those diagnoses were excluded by find-
7 T: g( a% R. K0 P- cing the normal level of adrenal steroids.5 j; b0 n* a5 r% p2 o0 F8 {
The diagnosis of exogenous androgens was strongly
1 e# W% [( R% x2 v1 Rsuspected in a follow-up visit after 4 months because
1 }) Z. O7 I; `7 u& o. O5 Ythe physical examination revealed the complete disap-
( c2 i) |2 m; f+ b9 \pearance of pubic hair, normal growth velocity, and5 Q1 K& s) g. q3 B% d: z
decreased erections. The father admitted using a testos-
. f+ Z! P# J3 I+ sterone gel, which he concealed at first visit. He was8 X. B1 G5 }( M) m8 j$ F
using it rather frequently, twice a day. The Physicians’2 A8 ~$ }" r3 j/ [
Desk Reference, or package insert of this product, gel or a4 ?; p- V6 d) ^9 A! K I z ~
cream, cautions about dermal testosterone transfer to
w3 e" d# v1 ~5 }( Xunprotected females through direct skin exposure.
) I/ v I! |8 ^( I* F& uSerum testosterone level was found to be 2 times the% g, c$ p3 ^! K5 X) V
baseline value in those females who were exposed to
' `* s1 N- C" T n0 T. R- ~+ F* \2 Aeven 15 minutes of direct skin contact with their male
! G: m; u4 T: rpartners.6 However, when a shirt covered the applica-$ ~& m- ^4 I# h- P$ C$ n6 Z6 K
tion site, this testosterone transfer was prevented.0 I U4 Y3 U" S" n0 j) p @
Our patient’s testosterone level was 60 ng/mL,
& T: @5 n, u+ r, Q6 vwhich was clearly high. Some studies suggest that
* h4 p/ X. H' U, y! W: n' `/ n. I, odermal conversion of testosterone to dihydrotestos-
* B/ l8 @8 [* d1 `% |2 q& uterone, which is a more potent metabolite, is more
# d' J/ ^' d. tactive in young children exposed to testosterone
# p' t: m4 X9 J W: Yexogenously7; however, we did not measure a dihy-
3 |' C1 y, O2 {' ddrotestosterone level in our patient. In addition to
7 ^, Q" n' C2 |/ F/ z! G( \) vvirilization, exposure to exogenous testosterone in! ]6 E. k' @) e0 U2 J- B
children results in an increase in growth velocity and
3 [ G' A& E0 J. M% {5 y* ~5 C5 Xadvanced bone age, as seen in our patient.% d4 ^/ d! t: l. o
The long-term effect of androgen exposure during
& P7 S8 M' {& `' q# c# F8 i. I: _early childhood on pubertal development and final
# o" C3 K9 e( R2 j$ padult height are not fully known and always remain
) w7 ^) a9 c$ g5 n# q7 c" Q5 g; ka concern. Children treated with short-term testos-
. M' `. Z6 J7 ]/ N) R9 u0 Nterone injection or topical androgen may exhibit some
9 L" c8 w2 a5 s; v8 X4 W, r, }acceleration of the skeletal maturation; however, after* t5 m/ a) G0 A; d/ `. L
cessation of treatment, the rate of bone maturation
4 M, p' q; [* Q- u" y# n! s; w. Odecelerates and gradually returns to normal.8,9
/ w" A7 F: T3 w5 c3 LThere are conflicting reports and controversy
: Z: d. a. j- O9 Y' _/ `over the effect of early androgen exposure on adult
7 H( P+ r# A4 B5 D) W3 r" Upenile length.10,11 Some reports suggest subnormal. L2 E3 ~) n9 ~
adult penile length, apparently because of downreg-3 E6 V7 I7 c1 ?$ k7 ^0 w6 {
ulation of androgen receptor number.10,12 However,
% q8 W3 f8 N9 u/ CSutherland et al13 did not find a correlation between# X5 D: N( ]& b& T7 s' W3 F2 Z
childhood testosterone exposure and reduced adult' B8 V6 T/ \! W/ u0 ~
penile length in clinical studies.
) H6 D. [, v! @Nonetheless, we do not believe our patient is, q8 a/ g0 y h8 i9 z0 H0 U
going to experience any of the untoward effects from
1 P& I% K( N; C g8 Y N8 f" \testosterone exposure as mentioned earlier because( n# o0 h% \/ `" S" R$ L4 s
the exposure was not for a prolonged period of time.( V; f8 M& r2 y- Q- j
Although the bone age was advanced at the time of8 N- n4 C9 R5 \- O7 L/ F
diagnosis, the child had a normal growth velocity at6 y) r3 k) }& |; I& A. K1 f
the follow-up visit. It is hoped that his final adult
" e: d: @2 B& e5 kheight will not be affected.
, ?, M0 x" H; _5 X/ [, W" ~0 EAlthough rarely reported, the widespread avail-
" d8 L+ Z5 f5 l8 m8 I! Hability of androgen products in our society may
6 q8 b3 t1 ^% o- |( H. V4 g ^2 gindeed cause more virilization in male or female% n) U! B: v7 i3 ^2 H
children than one would realize. Exposure to andro-
, k# M7 B; }5 z- {) n2 [/ bgen products must be considered and specific ques-/ S5 Y' L6 i" d1 K( u6 n& }
tioning about the use of a testosterone product or
- V9 p, f4 Y0 r2 egel should be asked of the family members during, |# Y6 H* r/ f- W" }# Y+ S- l
the evaluation of any children who present with vir-+ k1 W6 u' T: g4 Y N
ilization or peripheral precocious puberty. The diag-
0 s9 z0 l* k: G; x8 Z+ \nosis can be established by just a few tests and by v# X: y( \' l! ^! @9 c
appropriate history. The inability to obtain such a# r/ ?9 v( N( ?" H7 V
history, or failure to ask the specific questions, may
; C L& b$ Z0 `result in extensive, unnecessary, and expensive5 a L2 {5 Y V6 m
investigation. The primary care physician should be P; ?+ ~! @' I. {2 f- L
aware of this fact, because most of these children
8 `! R& m8 L0 w2 w# u9 Hmay initially present in their practice. The Physicians’
6 ?3 e4 q5 R: o0 k( p% @9 ]: s# eDesk Reference and package insert should also put a
. b C9 `: @2 x) A4 Wwarning about the virilizing effect on a male or
* n8 Y, i) Q; C3 {: vfemale child who might come in contact with some-
4 W. L) g" \: V) ]% i: done using any of these products.6 n7 _) V" q; ?$ f
References
: e# {/ @/ W1 Y* o# V4 _9 |, y1. Styne DM. The testes: disorder of sexual differentiation' I$ X8 s- \1 f6 I
and puberty in the male. In: Sperling MA, ed. Pediatric9 w4 r0 T# {+ _3 A1 w
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;3 R0 E, a9 D0 r
2002: 565-628.
% q+ a# \1 Q- C* Y5 w6 M2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious/ j' I t$ K; ^2 q1 F
puberty in children with tumours of the suprasellar pineal |
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