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Sexual Precocity in a 16-Month-Old
- z# n" s- r, O) x; g& y2 KBoy Induced by Indirect Topical5 v+ K0 _: [$ X
Exposure to Testosterone
! [8 p% z' S( P1 nSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
; s6 I" R0 G) j8 A+ U. @7 D" M7 mand Kenneth R. Rettig, MD1
3 p5 g$ I |# m. L6 P& a1 @# _. ]Clinical Pediatrics
# B& c: P1 D8 Y4 E" m5 T: a( L6 w9 qVolume 46 Number 6
2 a6 w$ c9 U) J* M5 r- c. YJuly 2007 540-5430 O: f& W; [4 X1 e8 f
© 2007 Sage Publications
% b6 G8 e! {, Y$ M, D10.1177/0009922806296651
$ ^) ?* S! |4 h1 whttp://clp.sagepub.com
- e9 e0 q$ A Y1 x W2 W4 Khosted at
R% q4 _% J7 ^ ^4 W) J0 [http://online.sagepub.com
( L" d+ N' R$ l, fPrecocious puberty in boys, central or peripheral,
2 w- @6 ^& l6 e! z" cis a significant concern for physicians. Central
% t& ~7 G# }5 Fprecocious puberty (CPP), which is mediated
# G2 c1 T% w R9 Ythrough the hypothalamic pituitary gonadal axis, has( I( n7 O; r7 g5 Q8 l$ o
a higher incidence of organic central nervous system
/ Q5 T1 ]3 _/ N3 j5 tlesions in boys.1,2 Virilization in boys, as manifested, p0 e# y q/ Z, |- y" ]0 ?* B3 f1 ?
by enlargement of the penis, development of pubic$ c6 ?1 g/ p; f6 h2 {2 [. C
hair, and facial acne without enlargement of testi-; h4 }& u/ D, J1 V
cles, suggests peripheral or pseudopuberty.1-3 We
/ l) g4 V# r5 d9 }( Zreport a 16-month-old boy who presented with the
: `. \) t: \7 A9 @0 @* r; oenlargement of the phallus and pubic hair develop-. P) n5 B2 Z0 t1 X
ment without testicular enlargement, which was due" s$ \: z3 Q! j6 o# y4 R6 \
to the unintentional exposure to androgen gel used by3 Z: E, s; l) C
the father. The family initially concealed this infor-; t, F( _0 X: q' \
mation, resulting in an extensive work-up for this
- }: m6 ?! ?) u! R6 Y) Qchild. Given the widespread and easy availability of) ?6 c- X- ]0 |: K
testosterone gel and cream, we believe this is proba-" w: \% h T# [; P
bly more common than the rare case report in the( W. q6 c* g: o+ f7 K2 i% h$ c
literature.46 x+ ^. Y- e# B& I/ @, i) w9 |
Patient Report
7 D O' Q, ?% H* a, E$ z7 L. @A 16-month-old white child was referred to the% F: V6 S2 R) V7 d9 E9 {) e" Z
endocrine clinic by his pediatrician with the concern( C6 G u) o( u2 M: ]
of early sexual development. His mother noticed; y/ p7 a% n2 x; b. \3 _" ^
light colored pubic hair development when he was) V7 \) q( g4 P3 }& I# |
From the 1Division of Pediatric Endocrinology, 2University of
& @ X1 N) t8 E6 Z& @: C# {South Alabama Medical Center, Mobile, Alabama.8 i6 h2 ?% K) s) g" @. O% i
Address correspondence to: Samar K. Bhowmick, MD, FACE,& W0 f |+ J# S- K
Professor of Pediatrics, University of South Alabama, College of" a d0 ?1 u% `, p+ G
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
' X, C. J b9 B, i9 E; B# B8 Ae-mail: [email protected].
O% \5 d3 g1 {about 6 to 7 months old, which progressively became
6 ?) h+ E* N# L0 b. Q; D# fdarker. She was also concerned about the enlarge-
: M P" o+ p. B; [. B# G, v7 mment of his penis and frequent erections. The child
2 |/ f M+ T8 @+ L, A ?1 V' iwas the product of a full-term normal delivery, with7 h* a' \. e/ r0 E) W8 F+ J
a birth weight of 7 lb 14 oz, and birth length of
4 Y; i" {: ` U/ L20 inches. He was breast-fed throughout the first year! ~* T8 s6 p1 ?7 Y- \" b
of life and was still receiving breast milk along with
6 }5 U5 ~) I# Osolid food. He had no hospitalizations or surgery,
$ [/ y/ V* e; S Y" J4 \and his psychosocial and psychomotor development) z6 S) B8 D8 Z4 q& ^# t
was age appropriate.: j/ u1 b9 J8 F/ P
The family history was remarkable for the father,
$ i& z9 E2 D& v) {who was diagnosed with hypothyroidism at age 16,
C6 f$ ^ ?- [- ~: T/ u. e1 ]which was treated with thyroxine. The father’s+ }$ R& X+ I: E. l8 ]
height was 6 feet, and he went through a somewhat. x- S/ E! c- |& M3 i' X6 o# w$ z/ H
early puberty and had stopped growing by age 14./ N8 E6 o/ U" {7 v
The father denied taking any other medication. The
3 V8 _5 ^* H* O6 b# s5 Ochild’s mother was in good health. Her menarche M$ ~; s+ D& j/ v8 H* V' R9 e) j9 Y
was at 11 years of age, and her height was at 5 feet6 f- t4 v# [- o( K* J
5 inches. There was no other family history of pre-
% r3 f# w: G% i$ Q# ~: p ucocious sexual development in the first-degree rela-
6 R# s0 g& \4 g. Dtives. There were no siblings." D, d& ?! b: |7 t! d9 Q/ u0 }
Physical Examination% j( o2 b4 Q0 w
The physical examination revealed a very active,5 S4 c! ], m6 [- ?
playful, and healthy boy. The vital signs documented) |4 y% ?5 U3 r/ B" X
a blood pressure of 85/50 mm Hg, his length was
! J& I8 ~7 ?" V90 cm (>97th percentile), and his weight was 14.4 kg
, r/ {* R( Z& C6 L(also >97th percentile). The observed yearly growth* ]; I9 o' X4 V
velocity was 30 cm (12 inches). The examination of
1 F5 v$ c, Z8 {1 X$ P( Tthe neck revealed no thyroid enlargement.' A. I$ L5 C9 K& _( E" v0 o& A
The genitourinary examination was remarkable for' D- L: V9 h/ Y( [ F; X e
enlargement of the penis, with a stretched length of H- t5 q) c* G5 z2 a: ?; l7 P
8 cm and a width of 2 cm. The glans penis was very well- F; P/ X: k+ ^" F. N2 U# I, p0 V
developed. The pubic hair was Tanner II, mostly around$ P' Q5 n0 O' Q" Z4 H& x3 Z' x: w
540" w+ q* B" I, b# o& J# v+ H' ^
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
; j6 n& q* o6 {the base of the phallus and was dark and curled. The% Y( y" T) T; x7 Q
testicular volume was prepubertal at 2 mL each." {+ |. h/ v2 s/ O0 O/ y2 g. [
The skin was moist and smooth and somewhat
# H! S3 {9 z6 V$ M) Q+ xoily. No axillary hair was noted. There were no- u4 {( V8 N" F8 f
abnormal skin pigmentations or café-au-lait spots.
# u: z% J8 F) z* ^9 V" ?1 S+ _; JNeurologic evaluation showed deep tendon reflex 2+
* R/ \; C# S+ r/ s' V3 s, rbilateral and symmetrical. There was no suggestion6 K5 ]1 N! C/ c
of papilledema.6 A' `8 i; ?, L, g* R" {
Laboratory Evaluation
! d0 ?) O/ D* y7 Z; f( Z- iThe bone age was consistent with 28 months by
0 z. B$ a6 @3 P5 ousing the standard of Greulich and Pyle at a chrono-+ P% l# u& n, v9 z0 T ]$ M
logic age of 16 months (advanced).5 Chromosomal8 i& g, h" P6 S# J$ U
karyotype was 46XY. The thyroid function test
* l3 \$ a) p q' }* L ]showed a free T4 of 1.69 ng/dL, and thyroid stimu-) {# i: L5 q3 J, ]) A5 U
lating hormone level was 1.3 µIU/mL (both normal).
3 p6 S/ r4 H4 F4 ^ ?* A! B% ?The concentrations of serum electrolytes, blood, |& ]3 P, q2 O9 _
urea nitrogen, creatinine, and calcium all were
' _ V1 T8 F+ r- {, P. gwithin normal range for his age. The concentration/ r3 E+ o( J" F6 l9 F K5 i9 b
of serum 17-hydroxyprogesterone was 16 ng/dL" P1 O3 Y% n5 t5 G) F* G$ N6 i
(normal, 3 to 90 ng/dL), androstenedione was 20
& Z K. _ x( O% E! {ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-. [6 _0 ?6 U9 ?
terone was 38 ng/dL (normal, 50 to 760 ng/dL),4 I- {" I. L( b- n2 `; V" p5 D
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
6 ~% @" i- _) R# ~9 W. l% v. H. E49ng/dL), 11-desoxycortisol (specific compound S). S$ S6 d- z, J' R3 T* m
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
* v2 Y; T3 I* {7 ]3 p2 Ltisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total- v0 ]# k1 R4 }8 l j% J) ~5 v
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
/ U4 M: g: r, q5 M O3 land β-human chorionic gonadotropin was less than; K( J1 P! E7 ] W% I: W
5 mIU/mL (normal <5 mIU/mL). Serum follicular5 Q& V% {8 [5 `% i; O6 L5 z$ N& }
stimulating hormone and leuteinizing hormone) C2 ~: Y4 u7 I0 s" Q8 z
concentrations were less than 0.05 mIU/mL
0 P0 t3 z# j5 v5 h" g2 J( x0 P(prepubertal).
! z5 j: C; Z+ f7 d* T# d, K$ X) W) MThe parents were notified about the laboratory* E- M3 x8 ~3 z! T. M, E5 S
results and were informed that all of the tests were" A) \9 ]# H" B3 S% ~
normal except the testosterone level was high. The2 ]0 c" N3 {" y( X' d) Q: b: S
follow-up visit was arranged within a few weeks to
7 }0 @ S. ]/ Uobtain testicular and abdominal sonograms; how-+ a% L; {6 t: V+ c. H
ever, the family did not return for 4 months.2 y5 p; B8 y+ R; ?: A Z8 F
Physical examination at this time revealed that the5 e) F+ J9 n; ?
child had grown 2.5 cm in 4 months and had gained3 Z$ X5 J3 w) w& q; f- e6 t
2 kg of weight. Physical examination remained7 F& h& d' {7 M' s8 @3 l, |' k
unchanged. Surprisingly, the pubic hair almost com-* C+ U: u) B3 {
pletely disappeared except for a few vellous hairs at" q- p) v1 Q( Y& s9 s
the base of the phallus. Testicular volume was still 2
/ K5 S1 O8 K; d9 i$ T! b( h) n" umL, and the size of the penis remained unchanged.( Q1 W* I* P l8 }3 l- Z. O/ D* h) ?+ I$ {
The mother also said that the boy was no longer hav-
5 Z. S, |0 L& [9 s% A0 J9 m* M' sing frequent erections.: ?5 u# Y. s! ^8 r- X4 U8 [+ W
Both parents were again questioned about use of/ v* s( E1 u, c! _6 ~4 ~6 c0 S
any ointment/creams that they may have applied to
" }( [" g W4 _( y8 r# v$ a3 J7 Bthe child’s skin. This time the father admitted the
" n3 }( ^$ |& W" v, uTopical Testosterone Exposure / Bhowmick et al 5419 x# l% F1 ^* k( k' V' H: E
use of testosterone gel twice daily that he was apply-
8 Q# B1 P8 L* X8 o! a+ S+ p, Xing over his own shoulders, chest, and back area for
1 G8 w9 O Y& ?, X. ha year. The father also revealed he was embarrassed
. A9 S* O) e& b3 Wto disclose that he was using a testosterone gel pre-7 h" a0 Z/ A0 |6 z
scribed by his family physician for decreased libido2 @4 _2 D7 H( a0 r# c9 V& R
secondary to depression.
3 i3 \; r( J2 U2 O0 R i( b) N+ RThe child slept in the same bed with parents.
% ~; r2 Z( \5 ]" vThe father would hug the baby and hold him on his1 o) K7 x |( o
chest for a considerable period of time, causing sig-
& F1 G0 `) R( g; B L8 I/ n1 J7 Y% l! Knificant bare skin contact between baby and father.! c, c; c0 F" l$ a1 i( b
The father also admitted that after the phone call,
" Z C( ?$ ?, O8 h% |9 zwhen he learned the testosterone level in the baby
; D+ m3 o! X6 ?, T% j8 Ywas high, he then read the product information
! P9 f' X7 z1 a; d( `packet and concluded that it was most likely the rea-( @' }0 z8 E5 `7 ]2 ]4 s- q9 I
son for the child’s virilization. At that time, they
: |5 `# |3 @* Q7 K& l- xdecided to put the baby in a separate bed, and the
8 J( U' H" i" E6 A' u8 nfather was not hugging him with bare skin and had
; o8 p. f; c; }. Ebeen using protective clothing. A repeat testosterone9 n! S9 e6 t% o. z# k
test was ordered, but the family did not go to the6 ^ a: r% e' E h, U0 ?: u
laboratory to obtain the test.# k P" e- {2 ~; I9 R
Discussion( }+ f* a- t9 M0 E" L
Precocious puberty in boys is defined as secondary
& U$ X! W3 Y* g! s' s9 Esexual development before 9 years of age.1,4* H7 I" N1 I/ I- ~% j# ?
Precocious puberty is termed as central (true) when
4 J. d( P+ u; ]) Z6 K& qit is caused by the premature activation of hypo-
' R' p& p6 S, l, @& [thalamic pituitary gonadal axis. CPP is more com- Z6 B( C1 x4 H
mon in girls than in boys.1,3 Most boys with CPP/ H8 K! J c# V5 J, H
may have a central nervous system lesion that is5 y4 T' z$ |% y2 b# n; @
responsible for the early activation of the hypothal-
' H! q# w" Q7 {' O9 Iamic pituitary gonadal axis.1-3 Thus, greater empha-$ M' h6 u5 M9 `! _: B+ |- ~
sis has been given to neuroradiologic imaging in
3 z3 e2 h8 Y3 b+ t. l3 v0 }! i$ Iboys with precocious puberty. In addition to viril- @/ ~# O0 D' L) Q% e! B
ization, the clinical hallmark of CPP is the symmet-2 Z$ t) O+ {4 Z9 D! Y! _- ^
rical testicular growth secondary to stimulation by4 F: l% f/ {8 G9 {
gonadotropins.1,3$ b& A7 z% f. ~" A. \* R0 s
Gonadotropin-independent peripheral preco-) H6 y. o p9 L" W4 p
cious puberty in boys also results from inappropriate
0 J9 g* B9 C2 a, R$ Gandrogenic stimulation from either endogenous or: a9 r+ g& m: w0 U! j
exogenous sources, nonpituitary gonadotropin stim-) f8 K' X( @/ K% \* G) I/ S
ulation, and rare activating mutations.3 Virilizing8 o+ P3 n) D- V" r* D
congenital adrenal hyperplasia producing excessive- q, _# L6 ] X* U
adrenal androgens is a common cause of precocious
$ }1 _5 L* }- g. Upuberty in boys.3,4
; q5 n& |+ h$ b1 m) K4 a! wThe most common form of congenital adrenal
' ^5 Q% ]( l6 y* y3 L, }hyperplasia is the 21-hydroxylase enzyme deficiency.
& D: k; P- K0 x; t$ Z; u$ x; h0 I* EThe 11-β hydroxylase deficiency may also result in
. a% ~3 o6 t% p1 ^: A) sexcessive adrenal androgen production, and rarely,
- p# N( i; U) S+ W6 d% Jan adrenal tumor may also cause adrenal androgen
6 D! \4 t6 q/ ~: Xexcess.1,33 D3 n( \, D; G
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, H( v/ L, g. r0 \3 u' r. _2 B
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
4 i1 k% n0 d1 l+ TA unique entity of male-limited gonadotropin-$ H/ _1 f" d+ h5 R0 S q( R( x* l$ a
independent precocious puberty, which is also known
5 B4 D7 V# ?) Mas testotoxicosis, may cause precocious puberty at a
3 E5 R4 s0 g% yvery young age. The physical findings in these boys2 W; V% s. P `/ J6 M' f
with this disorder are full pubertal development,
3 \5 d: {. k0 Z6 hincluding bilateral testicular growth, similar to boys
) ]4 e# B( g9 o" o5 v& hwith CPP. The gonadotropin levels in this disorder8 ^, g: S: ~: e
are suppressed to prepubertal levels and do not show
8 `1 ` Y" D- G6 Ppubertal response of gonadotropin after gonadotropin-
! F z0 X+ l2 E) freleasing hormone stimulation. This is a sex-linked" X3 ?+ x% G3 K2 Q( w1 ]' L4 a
autosomal dominant disorder that affects only p9 _1 ~. H! F. Z: F
males; therefore, other male members of the family
. O! `6 l" K& y( w: A. I4 A# Xmay have similar precocious puberty.3# |% T5 k2 n: S% h2 j2 T
In our patient, physical examination was incon-
: ^. L9 l q nsistent with true precocious puberty since his testi-/ r( e I* T& S' ^ L) T
cles were prepubertal in size. However, testotoxicosis, ^8 G& s- g+ v6 S$ b3 T
was in the differential diagnosis because his father
# w; M; @, `! e3 o% Ustarted puberty somewhat early, and occasionally,, w# s. T; [, O) G
testicular enlargement is not that evident in the
" y3 ]8 M# }" J ?; Pbeginning of this process.1 In the absence of a neg-
3 ^) V( V" x; dative initial history of androgen exposure, our2 S. x1 a5 W0 \9 C( e ?" |
biggest concern was virilizing adrenal hyperplasia,
( H1 ]; |; [! E; G: Z0 O% W4 ?& seither 21-hydroxylase deficiency or 11-β hydroxylase9 I5 L% a$ \- |3 Y& F4 ?
deficiency. Those diagnoses were excluded by find-7 a4 d, G# o/ F4 A/ [+ @% R
ing the normal level of adrenal steroids.
# l* z' \# s" |' i& m( S6 i. l# AThe diagnosis of exogenous androgens was strongly
' \& \8 Y$ }& u: r6 }) l/ rsuspected in a follow-up visit after 4 months because( Q& j1 w: k; J( {
the physical examination revealed the complete disap-9 U/ D; V; c" ^
pearance of pubic hair, normal growth velocity, and7 i) R' _: u. M! M( U4 n+ u" z
decreased erections. The father admitted using a testos-
% c' R' P D- ]7 Eterone gel, which he concealed at first visit. He was
: P# K, j j+ dusing it rather frequently, twice a day. The Physicians’3 F) I4 k. F. Q2 I: i
Desk Reference, or package insert of this product, gel or, Q" X& d: p# A* K2 f; B$ Y) k5 M
cream, cautions about dermal testosterone transfer to4 p, e, x- h) X1 ]3 f3 z
unprotected females through direct skin exposure.* ]8 i3 l' P, b6 V: b' `
Serum testosterone level was found to be 2 times the$ E# q. n5 X+ }7 D: F# x+ P
baseline value in those females who were exposed to. C9 e, \5 r8 p5 b+ w8 ~* k4 m# I
even 15 minutes of direct skin contact with their male$ |: p- C6 [6 z
partners.6 However, when a shirt covered the applica-0 |0 b6 T, y9 X' N% `
tion site, this testosterone transfer was prevented.
( X7 B4 Y2 v* ^# d% COur patient’s testosterone level was 60 ng/mL,0 O3 |( P& w9 P! @4 t
which was clearly high. Some studies suggest that
2 M, }0 I) ` R+ @$ N! [8 b) H2 rdermal conversion of testosterone to dihydrotestos-
b7 x# ^( Z* A0 s0 a! j" m2 hterone, which is a more potent metabolite, is more
6 R" e Q" |8 M* ~ m# Bactive in young children exposed to testosterone
0 l4 F8 ~- H' E2 Qexogenously7; however, we did not measure a dihy-! j- G. a8 B# ~
drotestosterone level in our patient. In addition to
6 C7 S2 M& ?, s* ]; N4 _% m2 rvirilization, exposure to exogenous testosterone in5 V) E% Y8 |* o0 {
children results in an increase in growth velocity and
. ]$ X6 @2 F# B. f1 Y8 r7 tadvanced bone age, as seen in our patient.
5 ^) g0 O$ Z, ?! g( a! G! t. K i7 CThe long-term effect of androgen exposure during
) G6 u- A9 k# t S8 _early childhood on pubertal development and final( N3 q! H3 p8 A# J* D& c! J( S+ P
adult height are not fully known and always remain
2 _9 `3 H+ g. M! @$ `8 _a concern. Children treated with short-term testos-
, D, ^" \3 R: x2 o" l6 [& tterone injection or topical androgen may exhibit some& G: b% @& M: q: y( i& e! h' R
acceleration of the skeletal maturation; however, after: ]$ @& g8 \: I9 d: Z
cessation of treatment, the rate of bone maturation
2 V# x: p' m7 R4 c; mdecelerates and gradually returns to normal.8,9
$ a& h2 v, i7 kThere are conflicting reports and controversy R$ n9 C- ~, W, y: D! H
over the effect of early androgen exposure on adult+ [9 Z, l6 G9 p
penile length.10,11 Some reports suggest subnormal
, W7 C4 Q7 \. H9 @- gadult penile length, apparently because of downreg-
# ~. H3 O( V1 w( Z2 ]* S. Nulation of androgen receptor number.10,12 However,# M8 Y- l5 u+ R1 G2 `
Sutherland et al13 did not find a correlation between: c+ G/ E$ p8 U) Q1 J' P/ L) ?
childhood testosterone exposure and reduced adult
. h$ d: Z5 W _) A; w) K( a Upenile length in clinical studies." {5 I8 T4 E; Y! m% y
Nonetheless, we do not believe our patient is! z7 b9 H# y. K0 r1 n; f# r
going to experience any of the untoward effects from
1 i! ]& O c; z7 q( V0 l1 E6 Ytestosterone exposure as mentioned earlier because
3 Y/ [; e- P( M) C3 F8 }the exposure was not for a prolonged period of time.4 B/ f0 E; k+ d. ]0 j
Although the bone age was advanced at the time of! e8 G0 n) R: g2 @/ `2 P
diagnosis, the child had a normal growth velocity at
! ~" q) c9 c* X xthe follow-up visit. It is hoped that his final adult
6 \' b7 ?$ y3 z9 s z& y# j/ q/ F+ `height will not be affected.
6 F! z" i9 N2 i, cAlthough rarely reported, the widespread avail-
. s5 P o' Z$ r6 Kability of androgen products in our society may
7 A8 P3 ~$ }2 N9 U5 T5 C6 P. bindeed cause more virilization in male or female
( E, K! d/ p$ c( f( i" }9 rchildren than one would realize. Exposure to andro-
2 v; I/ n) {$ E, }gen products must be considered and specific ques-
' Z1 F8 p l" i0 }/ F& j% btioning about the use of a testosterone product or/ H. k* o7 A$ ]5 x6 F
gel should be asked of the family members during9 V- j* `; p* Y0 ~3 o' R
the evaluation of any children who present with vir-* }9 R' [8 `1 J, {! D" M( u4 M0 ~
ilization or peripheral precocious puberty. The diag-3 i2 P2 \+ P1 ^, i9 }* l* u( a
nosis can be established by just a few tests and by! ~9 k! i0 ], @9 M8 V& A _/ }
appropriate history. The inability to obtain such a
/ C5 h. C% T I( v1 |9 _history, or failure to ask the specific questions, may
: M A/ `9 x$ Mresult in extensive, unnecessary, and expensive" R8 f( g% l/ [' c( Q
investigation. The primary care physician should be) o) @& K/ w2 `, I
aware of this fact, because most of these children
' A! d; e U$ R# @( p" @$ k5 Smay initially present in their practice. The Physicians’
" N1 R& f3 O7 X, r% [. GDesk Reference and package insert should also put a
1 @% A2 T$ s0 vwarning about the virilizing effect on a male or5 V5 y; d- x x2 A" ] {2 x
female child who might come in contact with some-
4 e, d+ a( o% Y Z! ~1 ~' Pone using any of these products.8 y5 m ?) }/ d# i f+ B
References0 x0 b, z2 w) D* W/ t: o; X3 x
1. Styne DM. The testes: disorder of sexual differentiation
7 X* Q j" r$ a; C Zand puberty in the male. In: Sperling MA, ed. Pediatric! u3 ?* J R' D/ y/ ]
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;3 U! W& ^8 | D5 R/ R7 ^
2002: 565-628.# J. W$ P0 f' p7 [
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious s$ t: f: \; T7 `, h5 |
puberty in children with tumours of the suprasellar pineal |
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