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Sexual Precocity in a 16-Month-Old
5 q/ `% i( s- }1 s$ k# qBoy Induced by Indirect Topical
, H3 L: Z' I! ~3 J' S& iExposure to Testosterone
5 [( X7 `1 w* ?/ h8 Z% K6 s2 LSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2% ]9 \ J- }# v# u+ P2 o7 E$ k
and Kenneth R. Rettig, MD11 [- c9 Z* X$ V7 Z+ g: u
Clinical Pediatrics. ^3 b7 w$ N7 Q& `3 B$ j+ R! n; i" f& _8 R
Volume 46 Number 6" t. X8 Q, H0 v0 q0 a, Q1 U. v* t
July 2007 540-5433 {7 q+ `6 r, V2 w# m
© 2007 Sage Publications& ^% S5 ?' T6 f, q% Z/ Y! `3 w
10.1177/00099228062966511 r4 I. ~4 d* n
http://clp.sagepub.com
5 A; Y5 g6 |, K7 | P% u: dhosted at
! X w" c1 R/ H( \7 q% }* E; ]http://online.sagepub.com! n6 K: z- A( e2 `
Precocious puberty in boys, central or peripheral,
' D7 @0 V+ e8 u2 B+ u/ sis a significant concern for physicians. Central
( r( J6 h$ m0 }5 Q: \1 Qprecocious puberty (CPP), which is mediated w, `7 b5 C6 ^) y
through the hypothalamic pituitary gonadal axis, has5 }0 O, P7 h1 V* U
a higher incidence of organic central nervous system
- u" Z0 n- Z \5 a* K/ V% clesions in boys.1,2 Virilization in boys, as manifested4 Z' o4 U$ P* ]8 K( u: [% N2 a& i
by enlargement of the penis, development of pubic9 P9 R8 }% U( k3 ^6 z6 z$ Z } e
hair, and facial acne without enlargement of testi-3 G! E( v: K Z% [
cles, suggests peripheral or pseudopuberty.1-3 We* z0 ]9 R4 y& M3 e+ `, O& @
report a 16-month-old boy who presented with the
5 V- j, }' _$ zenlargement of the phallus and pubic hair develop-% M' A5 w7 t+ g, n5 R
ment without testicular enlargement, which was due
- J! h) ^, M% f" Y, S$ b" x5 ^/ Eto the unintentional exposure to androgen gel used by
" Q0 T" X z" {2 K6 f& Nthe father. The family initially concealed this infor-
) c$ @4 V6 y( Fmation, resulting in an extensive work-up for this
2 Q- F2 y0 L' A3 P4 rchild. Given the widespread and easy availability of! A$ l, N1 j8 O4 i9 Q: d/ c
testosterone gel and cream, we believe this is proba-
' O' j9 \, ^& e; Q/ cbly more common than the rare case report in the/ N X6 `4 V9 B) }0 y) P% s
literature.4 J- J$ D- o) D1 w N- Q
Patient Report9 ]9 v# z5 V9 I2 S' n
A 16-month-old white child was referred to the
+ y, g6 U8 F. R; |" v' z1 Kendocrine clinic by his pediatrician with the concern$ t: V, h3 @- y$ W/ S
of early sexual development. His mother noticed" E" `3 g9 t& E- d% W. ? s+ @: V
light colored pubic hair development when he was# T% g) k! z) w+ m
From the 1Division of Pediatric Endocrinology, 2University of) h; D2 p, t( O+ g% ]# w X
South Alabama Medical Center, Mobile, Alabama.& d# e8 n D$ p# Z3 V! d0 D
Address correspondence to: Samar K. Bhowmick, MD, FACE,9 {1 o- |+ J9 @: @+ V) q
Professor of Pediatrics, University of South Alabama, College of8 W& ]( b# c: Q( G3 x& j
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;! y- q4 M" V" U* T9 P; t
e-mail: [email protected].! X$ Y* \2 H+ ]6 D: K# J
about 6 to 7 months old, which progressively became, f7 h' h: U G6 f k
darker. She was also concerned about the enlarge-
# Q9 O! [9 i8 u6 oment of his penis and frequent erections. The child& y' }+ V% c* i2 b. m- ^
was the product of a full-term normal delivery, with
( c/ h3 o1 e2 n8 q% p0 ?0 Ia birth weight of 7 lb 14 oz, and birth length of) Q8 P V. i5 H) d1 L
20 inches. He was breast-fed throughout the first year
- m4 m, y/ A' W! }/ A$ i. N# _, kof life and was still receiving breast milk along with Q* F+ H: d$ k2 }, M
solid food. He had no hospitalizations or surgery,
, b1 m( R& Q* j5 s7 Zand his psychosocial and psychomotor development( T+ p" o$ m( [* X- T+ l* u
was age appropriate.
; ~' [% G* M$ Z$ t/ O( lThe family history was remarkable for the father,/ `) G* Y1 W, b* b2 y! k5 ~* O
who was diagnosed with hypothyroidism at age 16,
" ~' b) O4 F4 u" Z, u! Dwhich was treated with thyroxine. The father’s" d7 T) j; ~. }4 j' y* z; @7 n/ S
height was 6 feet, and he went through a somewhat! }( ]* M; q ~4 U; Q! p
early puberty and had stopped growing by age 14.2 g! l; h% |! {6 B3 }
The father denied taking any other medication. The# d; N* A1 b: Y
child’s mother was in good health. Her menarche' H& |1 k2 {+ F' H6 d
was at 11 years of age, and her height was at 5 feet* o1 i. L! F9 i
5 inches. There was no other family history of pre-& |9 a4 A! s9 h5 c+ }3 `7 P/ C
cocious sexual development in the first-degree rela-- A( w9 K+ ~% v; _( U- U
tives. There were no siblings.7 p, N3 z" E. T5 T) n
Physical Examination
+ o) \' `; V$ [7 eThe physical examination revealed a very active,1 d! w0 a% V1 k0 a! d( w t% _
playful, and healthy boy. The vital signs documented1 F- c. R! o N4 g- [+ N( R$ K8 e
a blood pressure of 85/50 mm Hg, his length was
- i) q i4 D, m* K$ q# p& z' V/ R# j90 cm (>97th percentile), and his weight was 14.4 kg
# `- p4 ^$ ~$ |1 p1 p, n6 D(also >97th percentile). The observed yearly growth% Z( H2 O' R9 [
velocity was 30 cm (12 inches). The examination of
) o6 [( e( e6 z2 ?" Rthe neck revealed no thyroid enlargement.
) w6 f B; k( K& ZThe genitourinary examination was remarkable for I3 `/ n* {2 j3 z- P2 K M
enlargement of the penis, with a stretched length of
# g! q B$ L9 c* ^/ J4 e2 D8 cm and a width of 2 cm. The glans penis was very well: }3 I/ j" W% f. H
developed. The pubic hair was Tanner II, mostly around+ @1 g! j8 P4 K. n0 [. ]
540
" w# |- [5 F7 N- j4 ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; I6 f- \3 Z: s% ?$ ~( i, @: S
the base of the phallus and was dark and curled. The
" x& ^9 w: ~* r/ Ptesticular volume was prepubertal at 2 mL each.
0 i' m- G" S- c b/ f: LThe skin was moist and smooth and somewhat
5 b7 v$ p; g, u- w2 f( poily. No axillary hair was noted. There were no
( Z' B8 @+ l% E- j) D. rabnormal skin pigmentations or café-au-lait spots.9 L- y6 z$ b+ V6 G9 g5 ~) e1 C
Neurologic evaluation showed deep tendon reflex 2+
, Y" t0 x2 _* s: F+ t8 fbilateral and symmetrical. There was no suggestion k3 |0 V+ S; }# o: V
of papilledema.
- ?& R0 v d. b6 w( K8 ]Laboratory Evaluation
6 E, v( w% V; ?1 X7 eThe bone age was consistent with 28 months by
; o+ N# c# g, Zusing the standard of Greulich and Pyle at a chrono-; W7 E) K$ X1 j w; k( S
logic age of 16 months (advanced).5 Chromosomal4 A( o$ d% J6 {8 s0 l3 ~
karyotype was 46XY. The thyroid function test+ e. ?6 |2 q0 _
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
+ w$ B. n c* a; S5 O& Dlating hormone level was 1.3 µIU/mL (both normal).% @5 o' P: d2 Z& W9 Y$ j
The concentrations of serum electrolytes, blood
! Q3 n. o: I! h1 e7 g* @urea nitrogen, creatinine, and calcium all were, U6 y0 \8 H1 J. J2 R
within normal range for his age. The concentration3 @4 u; a. r- e/ J
of serum 17-hydroxyprogesterone was 16 ng/dL
. N# w5 `( A! X(normal, 3 to 90 ng/dL), androstenedione was 20+ A9 @" {& J4 S/ b! s7 p, X/ e
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
: c3 q. ]* u/ wterone was 38 ng/dL (normal, 50 to 760 ng/dL),
+ P. j4 h; }9 V8 O6 {desoxycorticosterone was 4.3 ng/dL (normal, 7 to6 X, c/ e( L2 e: C
49ng/dL), 11-desoxycortisol (specific compound S)
' E/ T0 S) T% d* zwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
0 Q+ H& s" D6 C0 {2 E, @$ rtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
# y% J; w5 o9 L/ _7 l5 N7 F0 o0 ftestosterone was 60 ng/dL (normal <3 to 10 ng/dL), {* B- q3 o; e- c& x
and β-human chorionic gonadotropin was less than
) M0 ]! s7 U/ C2 i& i5 mIU/mL (normal <5 mIU/mL). Serum follicular
' G( m8 M+ {# U- L3 R- W' Y: R+ V/ _stimulating hormone and leuteinizing hormone
6 L" h6 S& J" \concentrations were less than 0.05 mIU/mL; D3 f, P1 A& I
(prepubertal).
* V0 x% _6 u0 C4 t! a, K/ Q# FThe parents were notified about the laboratory E. D2 c( c& ` S/ ^ N) e
results and were informed that all of the tests were$ L8 R! _$ u' G: l) L0 j
normal except the testosterone level was high. The9 c4 M8 J2 x6 C9 ?, g% @2 o
follow-up visit was arranged within a few weeks to
" j5 A$ r9 s8 v' S- F$ gobtain testicular and abdominal sonograms; how-
1 |3 c1 J3 R: hever, the family did not return for 4 months.' x/ f- Z5 [+ l& I: `+ \
Physical examination at this time revealed that the
& o2 w# F6 F' u, W5 l# |2 `child had grown 2.5 cm in 4 months and had gained, x" U/ k5 g8 y& A G
2 kg of weight. Physical examination remained
/ w2 n" c. b- Q* F+ R2 r4 ]unchanged. Surprisingly, the pubic hair almost com-# i& T/ ~: c9 [/ B
pletely disappeared except for a few vellous hairs at
1 a* \6 l1 K! e3 m5 rthe base of the phallus. Testicular volume was still 2
6 B8 \/ I1 P. `! g9 `- imL, and the size of the penis remained unchanged.0 f# \# H5 t% U1 o! t
The mother also said that the boy was no longer hav-$ f: {2 G) E" [. \( i) y
ing frequent erections.
: p0 ^1 X6 _) e7 }! |+ C4 ^Both parents were again questioned about use of: r7 T. R/ E1 \' Z' C6 `2 s
any ointment/creams that they may have applied to! j: \8 Y3 h2 h& n7 g3 ~5 |/ a
the child’s skin. This time the father admitted the8 `+ {* f% [1 \
Topical Testosterone Exposure / Bhowmick et al 541
3 l! M5 v9 G- H0 B9 F f$ @' Cuse of testosterone gel twice daily that he was apply- B% T+ m. }+ \) A O- q( t
ing over his own shoulders, chest, and back area for2 G8 f9 U' y) o# J$ V
a year. The father also revealed he was embarrassed
& N; F( \ m1 N4 cto disclose that he was using a testosterone gel pre-
8 ]2 g& t3 `6 \/ G* o$ {. mscribed by his family physician for decreased libido
3 B7 I x9 A+ L( E' l7 q" O0 [secondary to depression.
: W* y. E9 A. j9 a' ]; nThe child slept in the same bed with parents.
5 o/ P7 w2 K4 b, bThe father would hug the baby and hold him on his: n1 p% I8 R" _1 u
chest for a considerable period of time, causing sig-
% u4 Z9 m! Y" k3 W) N! d2 C1 Jnificant bare skin contact between baby and father.
$ r b; `! g# M. y8 L( N: \8 qThe father also admitted that after the phone call,
0 u7 W: h& x- c/ U! Jwhen he learned the testosterone level in the baby
$ v+ J' @( h# m: }+ Dwas high, he then read the product information
# V% k2 }" l4 X0 ^packet and concluded that it was most likely the rea-
]7 C6 F7 |3 J ]) nson for the child’s virilization. At that time, they
3 b+ X2 _, _7 J4 c( C/ f! Ndecided to put the baby in a separate bed, and the) k' ?0 |9 V. _: @9 `* [3 ]4 V: |) K
father was not hugging him with bare skin and had* M) {5 }9 H8 l, x
been using protective clothing. A repeat testosterone# r9 Q- E. n ]" d+ e. P6 w
test was ordered, but the family did not go to the6 n9 A6 s, {& k! w
laboratory to obtain the test.
2 u2 @2 D8 C' p3 S8 iDiscussion
$ @' q7 x& e: n% c$ VPrecocious puberty in boys is defined as secondary
" k, H' F8 S7 F5 isexual development before 9 years of age.1,4
& w) {. |7 N& s1 {; G) u+ YPrecocious puberty is termed as central (true) when
. d7 Y. _/ W4 q, O6 h: I/ Y5 Qit is caused by the premature activation of hypo-% x5 }5 Y9 f' [! B* R" W. n% u9 X
thalamic pituitary gonadal axis. CPP is more com-
1 i, c/ C6 I- A7 ^6 Vmon in girls than in boys.1,3 Most boys with CPP
6 r2 Q, L& p% W- N0 Q& Xmay have a central nervous system lesion that is
$ k( J. w7 n* x9 N7 J& Lresponsible for the early activation of the hypothal-
H. `7 j% r, g0 J! ~amic pituitary gonadal axis.1-3 Thus, greater empha-! r8 j: {, R; u/ o# N+ f
sis has been given to neuroradiologic imaging in5 F1 {& f2 X: }, x: ~* j& m$ d
boys with precocious puberty. In addition to viril-' E/ K4 _- C; m% c7 b
ization, the clinical hallmark of CPP is the symmet-3 u* a" u' q8 }7 `: t5 g
rical testicular growth secondary to stimulation by# n4 ?& q0 @; e+ R+ m' e, n
gonadotropins.1,3% r7 S- s% e0 D
Gonadotropin-independent peripheral preco-3 t# C) W$ B) @# D, e& C* @6 G
cious puberty in boys also results from inappropriate6 P7 f( d, y* B* {2 y. e
androgenic stimulation from either endogenous or, n( I" P( h4 A/ P5 w- g6 |6 S
exogenous sources, nonpituitary gonadotropin stim-
) h2 d/ m& C( d" M6 o4 ?ulation, and rare activating mutations.3 Virilizing
. H" Y- [. O/ a5 |' Ucongenital adrenal hyperplasia producing excessive
+ L9 h. H2 z) }8 O5 \adrenal androgens is a common cause of precocious8 k! ]1 E; l& u1 W
puberty in boys.3,4! c# L B0 O" g8 V8 M" z% s9 y
The most common form of congenital adrenal
# N# X) C0 M# V! ~% |' dhyperplasia is the 21-hydroxylase enzyme deficiency.9 }! O' ^# X \# _" S( `; a
The 11-β hydroxylase deficiency may also result in
( K/ k% t3 S7 c- w* Hexcessive adrenal androgen production, and rarely,
9 m. U# \" E% G" D( tan adrenal tumor may also cause adrenal androgen
4 G- b: Q- G% N* mexcess.1,30 i$ H- A8 D2 Z/ V+ h2 x% x. x+ K" Q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
' T: Q( J' O( f, u- F5 R542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
' n% U8 w% b: F5 A' VA unique entity of male-limited gonadotropin-
& v8 ?; r) X' g) w* Vindependent precocious puberty, which is also known5 Z4 v. M- U _" Z" @+ C6 [
as testotoxicosis, may cause precocious puberty at a
C% ~- p1 ?: C( X% wvery young age. The physical findings in these boys
8 i/ h" n- }' M% \, e1 ?with this disorder are full pubertal development,
# M: Q, c2 a8 Uincluding bilateral testicular growth, similar to boys3 J. f7 W6 a% p9 @+ ~1 k$ I) {
with CPP. The gonadotropin levels in this disorder6 E3 @# c5 Z9 i( X- D) e
are suppressed to prepubertal levels and do not show
) T! y8 C# ?, {+ ?! E4 |. Ypubertal response of gonadotropin after gonadotropin-
% P2 q `. u; ^- Dreleasing hormone stimulation. This is a sex-linked
I& K' J: v' K) \& ~autosomal dominant disorder that affects only
5 i* L! p ?0 C$ H/ n, Ymales; therefore, other male members of the family
6 U4 G i4 ]6 U. omay have similar precocious puberty.3
9 u* q, k8 `& g% E( a- xIn our patient, physical examination was incon-( b- g- v c1 L3 @8 E5 M; ~
sistent with true precocious puberty since his testi-
6 ^8 N6 d+ q3 m4 w3 rcles were prepubertal in size. However, testotoxicosis) b- c; I1 W* Q# r
was in the differential diagnosis because his father
/ G- K1 t6 T1 ^- S4 |: c1 |started puberty somewhat early, and occasionally,# p. h( V) Y v( z: ?: j
testicular enlargement is not that evident in the
s, d) g" r' d: \4 \beginning of this process.1 In the absence of a neg-
% o. ], i8 B/ A, F5 c3 sative initial history of androgen exposure, our
7 l* x8 c m z5 V& m! ^3 `biggest concern was virilizing adrenal hyperplasia,4 ?# L r. a' s# X1 R/ L
either 21-hydroxylase deficiency or 11-β hydroxylase
" i6 }4 Z/ X4 t! F; _1 [deficiency. Those diagnoses were excluded by find-$ z# \' |4 D( j/ K! \
ing the normal level of adrenal steroids.
' ]- ]5 X- d9 [( z) n% rThe diagnosis of exogenous androgens was strongly* P j u# B! T
suspected in a follow-up visit after 4 months because, @; z! D; _* E" _% v
the physical examination revealed the complete disap-5 v( R+ ^3 @8 o8 b- y. _
pearance of pubic hair, normal growth velocity, and2 m! y+ V6 r% z x) j
decreased erections. The father admitted using a testos-
2 p0 e; p) ]7 K, x! Uterone gel, which he concealed at first visit. He was
( f; _. c. p6 \. ]using it rather frequently, twice a day. The Physicians’
4 G$ Z0 D0 t5 s' c& U8 QDesk Reference, or package insert of this product, gel or1 _9 m& K$ o- ~5 K6 _' m: ?
cream, cautions about dermal testosterone transfer to" `6 V' [8 n2 \, X/ O
unprotected females through direct skin exposure./ N- @7 b/ @ a$ J0 p) b
Serum testosterone level was found to be 2 times the" ~$ X, P7 D& |7 O
baseline value in those females who were exposed to& |8 Q7 E3 r. N! b1 h
even 15 minutes of direct skin contact with their male
# o( a' F5 R6 g4 t0 N) npartners.6 However, when a shirt covered the applica-* ?# U4 w; g4 _8 D+ q5 n& R
tion site, this testosterone transfer was prevented.
5 g' \9 L7 Z5 Q9 qOur patient’s testosterone level was 60 ng/mL,
8 n3 k& ?; h4 W/ \7 jwhich was clearly high. Some studies suggest that* E* [/ J$ Q: `: B4 f7 f' x+ G
dermal conversion of testosterone to dihydrotestos-
1 M- K: f) y; O; _+ y4 _( Iterone, which is a more potent metabolite, is more
& f3 c x4 O1 m5 G7 X6 G& }( V2 Xactive in young children exposed to testosterone& ^% S" I l2 Z: R, v
exogenously7; however, we did not measure a dihy-' S4 d: d( d( u4 z$ U/ z; p u
drotestosterone level in our patient. In addition to
6 `$ _$ o. D/ T* b& D' ^6 p4 P* o" svirilization, exposure to exogenous testosterone in5 m/ D2 `- x9 p. I
children results in an increase in growth velocity and- p4 M- Q* U5 q$ P2 u5 E, M9 ]4 X
advanced bone age, as seen in our patient.
5 h; a2 C. y# ]: n- H9 CThe long-term effect of androgen exposure during
6 i0 n; z3 g. J/ O9 Learly childhood on pubertal development and final
& \3 X4 \: w* h8 aadult height are not fully known and always remain# b g/ A* z- [, u" o- {
a concern. Children treated with short-term testos-/ @* [6 T( A+ q" Z5 ~8 R, \
terone injection or topical androgen may exhibit some
% q. L; \; d$ bacceleration of the skeletal maturation; however, after- q, m: @5 |3 q Q: S
cessation of treatment, the rate of bone maturation4 i1 W) @' S. o. C$ ?$ @
decelerates and gradually returns to normal.8,9 `1 o0 ~) Y/ O
There are conflicting reports and controversy
, K$ O# M% e5 Sover the effect of early androgen exposure on adult z4 V8 P* Q' A! O
penile length.10,11 Some reports suggest subnormal6 D# |1 ~3 e- @5 v v b% y& f) n
adult penile length, apparently because of downreg-1 ?; i5 j9 |3 C) d Z; L
ulation of androgen receptor number.10,12 However,9 w' ~- n; f! m1 C' D
Sutherland et al13 did not find a correlation between6 {$ A" P9 e5 @: l$ `) V2 ?' x
childhood testosterone exposure and reduced adult
6 I5 X; x: I0 d4 Hpenile length in clinical studies.. j2 J, Y$ o. U# T8 \5 `! t
Nonetheless, we do not believe our patient is
0 W, f) z' I; r2 `- F5 ? _going to experience any of the untoward effects from
/ x2 U1 B( v$ c/ c9 q. Y0 V" ttestosterone exposure as mentioned earlier because
2 t9 t* U4 F3 F& x" q$ d) wthe exposure was not for a prolonged period of time.9 Z* ~- l6 K# h# @* a5 s u! N5 X
Although the bone age was advanced at the time of
% ?. m j3 i0 A# wdiagnosis, the child had a normal growth velocity at9 X' V" d% Y/ }$ B7 [
the follow-up visit. It is hoped that his final adult) `7 A! x# P9 K4 j+ V, \1 p
height will not be affected.% K& t' @# g+ w- K7 x8 z6 U
Although rarely reported, the widespread avail-
5 R/ s/ s1 V ~ability of androgen products in our society may
0 ], m2 a3 k* U; _, O# m k% \' F' _indeed cause more virilization in male or female
; c; Z7 X& l( T) gchildren than one would realize. Exposure to andro-
1 U6 p N7 b6 {8 Lgen products must be considered and specific ques- E- @' x3 Y) g' Q h8 x" h7 t
tioning about the use of a testosterone product or; y- m$ }% J% a! `2 W5 p+ E
gel should be asked of the family members during
5 F. S9 l6 U' W, L2 T; Bthe evaluation of any children who present with vir-$ o U. O7 S7 C3 e
ilization or peripheral precocious puberty. The diag-
b, E* Y' t2 K8 V- } Qnosis can be established by just a few tests and by9 z5 {* o; m" B; w9 h0 b& j
appropriate history. The inability to obtain such a
- L' E7 |3 u* t, Lhistory, or failure to ask the specific questions, may! E4 p/ E8 }* [; u6 E
result in extensive, unnecessary, and expensive. p. [' [' N& @8 v9 \. `2 h
investigation. The primary care physician should be
- L2 }! b: i6 m$ i! E. _$ Taware of this fact, because most of these children0 f0 H# H) S' V# {( h4 C
may initially present in their practice. The Physicians’
& n1 @) X0 k6 [1 F9 @Desk Reference and package insert should also put a2 o, T2 b8 B% x! o' n3 P
warning about the virilizing effect on a male or ]; A9 M; T( U
female child who might come in contact with some-
( l4 Z5 K* l; ~. W; L! none using any of these products.* i2 W) W* ^7 z2 A
References
* K+ b# g8 c7 j, \; E5 [8 ^& Q2 C1. Styne DM. The testes: disorder of sexual differentiation
3 V: x# ~: y1 }2 M! Gand puberty in the male. In: Sperling MA, ed. Pediatric
; e! U* ?' [1 e! K3 o8 _5 QEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;, K; N! s% A& v. F# c" n1 e) j" _- X
2002: 565-628.
: H+ Z X! u# P! n1 u2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious6 `; @& Y4 g* e- E: x4 e
puberty in children with tumours of the suprasellar pineal |
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