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Sexual Precocity in a 16-Month-Old! W# ^/ E1 y" g5 y4 h5 v$ T5 ?
Boy Induced by Indirect Topical% [; ~" H7 D/ O6 I4 U. r. i/ ?2 r
Exposure to Testosterone1 k: Y8 ]4 W) @8 P( L/ E
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
5 j2 a6 d# P5 K- a1 V. z) gand Kenneth R. Rettig, MD18 Y$ u' h- I- M, W0 r4 ^( x
Clinical Pediatrics6 X% A# |" v: p9 ?$ L
Volume 46 Number 6( Z6 J$ x8 v4 L( B8 h
July 2007 540-5432 |5 n8 ^" J7 x: K) C
© 2007 Sage Publications+ _: I! Y! x6 d0 e: H3 u
10.1177/0009922806296651
1 E! d) w6 Q' X& n5 b6 o9 U6 A/ Phttp://clp.sagepub.com! v& |4 A1 {0 y: d8 C' Y: Y2 Z! o
hosted at1 _( R# E' ~- [: g3 g
http://online.sagepub.com
& ?! @$ S9 t: O* O1 ^Precocious puberty in boys, central or peripheral,
' `( E0 w3 Q2 b# u; h+ g. o3 G! W2 Vis a significant concern for physicians. Central
3 R T. a0 H# T' y- Hprecocious puberty (CPP), which is mediated
- X: F3 L" S, A( g0 n6 t7 n4 ~6 U* wthrough the hypothalamic pituitary gonadal axis, has7 s# [; \6 y, `& P' x9 T
a higher incidence of organic central nervous system
" r. s' Y/ B/ slesions in boys.1,2 Virilization in boys, as manifested
. |' N; `5 ^: {7 N# Q( {3 E5 Sby enlargement of the penis, development of pubic
8 I1 y5 H4 v* W" b* hhair, and facial acne without enlargement of testi-
1 Z( R! P! ]3 _3 K- g9 a, vcles, suggests peripheral or pseudopuberty.1-3 We
/ V6 y' a$ E2 Z7 R+ m8 K/ w' Treport a 16-month-old boy who presented with the
" H! S5 e* T2 V5 Henlargement of the phallus and pubic hair develop-
, y/ {. h. q @3 w( c' d% _ment without testicular enlargement, which was due
! ]7 X" I4 x. ^1 p4 `, P* gto the unintentional exposure to androgen gel used by. F6 `$ Z5 a e1 ^) i1 L) x2 z: h, E9 K
the father. The family initially concealed this infor-" A- K( w7 @# S2 k8 h; o6 y
mation, resulting in an extensive work-up for this4 u2 ?2 o9 z+ e5 m% ^' n8 T
child. Given the widespread and easy availability of
8 _- X8 ^# I' H) l2 [* Q1 Qtestosterone gel and cream, we believe this is proba-& b" M4 l- I% d2 E
bly more common than the rare case report in the
2 Z# A: z6 R' ]; x$ u1 Cliterature.4
( t% X8 G. `) w" `4 J, D7 \Patient Report X: S3 F6 N1 @- v8 V& B7 |
A 16-month-old white child was referred to the
# _+ G3 d" y9 j0 Y4 g" Z( rendocrine clinic by his pediatrician with the concern
( ^/ y3 n2 s& A! F9 [of early sexual development. His mother noticed
5 ]3 u! J: h4 V9 E8 ^8 H! elight colored pubic hair development when he was" m f; j8 l5 J. p) h& i
From the 1Division of Pediatric Endocrinology, 2University of! L4 J1 ^, D* x" e, j- ^" w
South Alabama Medical Center, Mobile, Alabama.0 l. m5 Z' d9 ~1 t4 b! R
Address correspondence to: Samar K. Bhowmick, MD, FACE,
; P, [( p$ [6 Z0 g1 cProfessor of Pediatrics, University of South Alabama, College of
/ Z F* T+ O9 ^& `* ]% L$ @ w* ZMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
& O- I& Y! z: u8 B0 H$ E1 ?e-mail: [email protected].
0 A8 ~" I+ e1 Y9 P; n Wabout 6 to 7 months old, which progressively became
& j# E# P. C8 _- t* ldarker. She was also concerned about the enlarge-
6 P8 b5 u: J( s. zment of his penis and frequent erections. The child/ A) ?, ]1 _" X8 z" i
was the product of a full-term normal delivery, with' V9 P$ V& r; G
a birth weight of 7 lb 14 oz, and birth length of. N" z( Z5 N# H( S k! w" ]" m3 e- [
20 inches. He was breast-fed throughout the first year6 A- U) z. l, N( B R- `" d8 j# s5 X
of life and was still receiving breast milk along with
( _3 p2 n6 O4 esolid food. He had no hospitalizations or surgery,
' e7 F. \7 F0 mand his psychosocial and psychomotor development
) ]% X& u8 W, ywas age appropriate.9 m- V; P0 R* k) q& {
The family history was remarkable for the father,1 U f4 s# M ^' Y O
who was diagnosed with hypothyroidism at age 16,
8 a. Z O* q/ s' C" Ewhich was treated with thyroxine. The father’s) W# m9 T4 z- F+ |- ]& d% f# U- w/ m
height was 6 feet, and he went through a somewhat! v A5 K' o2 j- k8 @/ m; M8 b* S
early puberty and had stopped growing by age 14.
0 k9 |+ }$ l' o. gThe father denied taking any other medication. The
$ H: y- V; f, _' [* E+ a. J! Lchild’s mother was in good health. Her menarche. r# _4 Z9 z2 H4 X( B: B
was at 11 years of age, and her height was at 5 feet
/ V" N# I f: @5 inches. There was no other family history of pre-6 `# t d5 \4 ]9 e8 x7 `; T; a
cocious sexual development in the first-degree rela-+ v! U: |/ U5 w1 i
tives. There were no siblings.
0 C+ e; J" n/ rPhysical Examination" N5 y2 F1 |5 h
The physical examination revealed a very active,
. R# B: d( ~+ U' P# m4 iplayful, and healthy boy. The vital signs documented
- f/ K1 d! u- f, c( y7 Z- Ka blood pressure of 85/50 mm Hg, his length was
& w1 b$ ?* Q4 @6 o" U; a6 w& j90 cm (>97th percentile), and his weight was 14.4 kg
6 C: k% Y/ ]% [- |( l(also >97th percentile). The observed yearly growth
" {" Y2 d) ~) q' e- kvelocity was 30 cm (12 inches). The examination of. w- P- @# t7 {8 |6 ~2 @; p+ K7 ?; C
the neck revealed no thyroid enlargement.* ^. m+ t* _* y5 d, m. i3 a
The genitourinary examination was remarkable for }, Y3 ~1 l/ E2 c- j4 Q" C
enlargement of the penis, with a stretched length of# y7 e: ]2 P/ E* v; ~# n: X! X8 _
8 cm and a width of 2 cm. The glans penis was very well
/ X& v( d# B! V& {& Zdeveloped. The pubic hair was Tanner II, mostly around8 m# a4 O# }( p: S: L$ \' C+ m
5405 j5 K* U9 J& c5 @3 p, ^4 E
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
% i& H! k( K+ ~3 Z3 pthe base of the phallus and was dark and curled. The9 d- j/ s; x$ g& W
testicular volume was prepubertal at 2 mL each.
0 y* n1 s' }" H+ W; N |4 BThe skin was moist and smooth and somewhat/ P, C. k o* ]/ a" V4 T3 c
oily. No axillary hair was noted. There were no
2 L1 ~8 |) S& A1 p7 c( vabnormal skin pigmentations or café-au-lait spots.- B. Y, P$ c, n; l
Neurologic evaluation showed deep tendon reflex 2+( E9 F5 Q# r; {* p7 V3 p
bilateral and symmetrical. There was no suggestion
. k! K) t+ g7 V3 p+ {of papilledema.2 _* e [/ b/ ^$ f c `+ _
Laboratory Evaluation
8 ?# `; u& F6 k+ M# e \0 @) UThe bone age was consistent with 28 months by
9 z& a1 y% J6 V" `! lusing the standard of Greulich and Pyle at a chrono-
7 W- i9 O9 l! v5 q- @! clogic age of 16 months (advanced).5 Chromosomal0 ~( ~) m7 ]# e# j5 Y
karyotype was 46XY. The thyroid function test
; D( l; o; T5 M4 g- ashowed a free T4 of 1.69 ng/dL, and thyroid stimu-
; G* _7 l' p6 @' \lating hormone level was 1.3 µIU/mL (both normal).
6 T5 R I, `5 R* v: ^ K! ZThe concentrations of serum electrolytes, blood
9 A5 A& r; E! I2 l% L9 \3 P$ Wurea nitrogen, creatinine, and calcium all were+ r2 ]! [9 f+ { y% N& ^8 E
within normal range for his age. The concentration
+ a& R4 ?1 n( m5 M( X3 Vof serum 17-hydroxyprogesterone was 16 ng/dL
E' S6 @ D$ ]7 x(normal, 3 to 90 ng/dL), androstenedione was 20
9 x' y1 V/ b- `; lng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-- z5 t* }7 x7 T) n
terone was 38 ng/dL (normal, 50 to 760 ng/dL),* D3 d3 {: o+ p
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
( u% z, ?0 @1 D1 }! c7 ^. X* G49ng/dL), 11-desoxycortisol (specific compound S)% ?6 a3 o: V3 H3 L% b4 v
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
3 B3 n( r8 v4 k5 @" l" h8 c8 ntisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total$ p3 ^ w" @) n6 H9 P# U: k
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
* @& i: ]1 l! A) I' jand β-human chorionic gonadotropin was less than
# J4 H: c" k' G- x$ h5 mIU/mL (normal <5 mIU/mL). Serum follicular- m6 s u: \$ `/ L. |7 P1 ]! b
stimulating hormone and leuteinizing hormone
2 ]1 b) U; n- M: e0 U. }concentrations were less than 0.05 mIU/mL
7 {* o# E% T! {, U |$ W# M- i+ b(prepubertal).
/ u! S/ |% W* b/ O3 S0 x; bThe parents were notified about the laboratory% d: s l0 z3 A3 j
results and were informed that all of the tests were
8 U, i% ^6 U4 tnormal except the testosterone level was high. The
6 i0 C3 Y* w2 I, H4 G0 y7 ufollow-up visit was arranged within a few weeks to$ K, O; y/ X0 L" D
obtain testicular and abdominal sonograms; how-
( p, G3 F2 I# [) p3 W7 e, qever, the family did not return for 4 months.: _1 \' F" u+ A8 \: ?. S
Physical examination at this time revealed that the
& j: C- u/ X" D) b/ Mchild had grown 2.5 cm in 4 months and had gained6 u4 d/ n0 v. P4 `, q' w
2 kg of weight. Physical examination remained/ f9 |: H4 ?& r% k- A8 O. e# a
unchanged. Surprisingly, the pubic hair almost com-
6 e3 W8 m h$ A, i- |pletely disappeared except for a few vellous hairs at; X6 F! Y. b* m; g
the base of the phallus. Testicular volume was still 2
, P# t! a" N4 T C$ P8 JmL, and the size of the penis remained unchanged.* w, R# x3 W! X1 L+ A4 d! N
The mother also said that the boy was no longer hav-
( n. J- |! R# A) I& p7 ving frequent erections.8 x& R0 {: L9 b3 R4 C v
Both parents were again questioned about use of9 ?9 [4 N9 q) R) j) c
any ointment/creams that they may have applied to
' b' |) o( |( V% bthe child’s skin. This time the father admitted the
; q4 Z3 }8 F7 N9 _1 Y) ]- HTopical Testosterone Exposure / Bhowmick et al 541
: G0 }/ f; v) S$ U T2 Fuse of testosterone gel twice daily that he was apply-. I" L b+ Z3 o. S+ ]- U% K
ing over his own shoulders, chest, and back area for2 a/ _2 u4 m9 M6 x# X) b
a year. The father also revealed he was embarrassed
1 M' E) r& a* H% r6 b( Ito disclose that he was using a testosterone gel pre-
* t2 z- A) @$ _" N2 P$ Z3 h$ Lscribed by his family physician for decreased libido; E. q! N; K, U& i, r- D' U
secondary to depression.
6 {+ a, O- c eThe child slept in the same bed with parents.
4 O" r/ g/ s1 ^" G' q8 ?The father would hug the baby and hold him on his( ~; c7 ^: M( |, h
chest for a considerable period of time, causing sig-
! J: b5 V6 @3 Y# m" xnificant bare skin contact between baby and father.! v4 o/ j4 I' O7 J: V) W
The father also admitted that after the phone call,% ^; t! F9 x; I9 r5 f* _- X, {
when he learned the testosterone level in the baby* z5 u {3 ^ J' X; X
was high, he then read the product information
% d, r8 E5 n5 x9 \( d: ipacket and concluded that it was most likely the rea-0 ]$ O* V+ e; f$ u5 C
son for the child’s virilization. At that time, they8 O' ~6 u3 Q: t5 e! z
decided to put the baby in a separate bed, and the) g$ r0 K* i8 J( Y3 R
father was not hugging him with bare skin and had
- m1 X3 \. A) d$ V. Y7 a- c8 U; Rbeen using protective clothing. A repeat testosterone4 D5 p7 S ?8 k# X
test was ordered, but the family did not go to the
- e/ D% V3 U' ?, h3 _+ x$ |laboratory to obtain the test.- o% B3 K3 [2 |' d; b7 O9 a
Discussion
! h2 X' b/ m# f7 k/ JPrecocious puberty in boys is defined as secondary+ z' P0 E: G4 @& i" d8 n3 W
sexual development before 9 years of age.1,42 o9 F9 z! Y9 F, w3 y8 @# X
Precocious puberty is termed as central (true) when5 u. X) ~# O6 d' y8 f# X9 V
it is caused by the premature activation of hypo-
- i! X' D1 ~, E1 U. w1 Uthalamic pituitary gonadal axis. CPP is more com-
B: H4 r9 y2 q0 Zmon in girls than in boys.1,3 Most boys with CPP; }# b: ^- S+ M4 c2 R. k: Y
may have a central nervous system lesion that is
- U# J8 q5 D$ C; N0 ?) rresponsible for the early activation of the hypothal-& i7 K5 S+ Y. K j
amic pituitary gonadal axis.1-3 Thus, greater empha-
' `! q7 `# M5 u8 @) [% @sis has been given to neuroradiologic imaging in
( y# p; ?) \& G: V- Cboys with precocious puberty. In addition to viril- r; B& M4 Q$ x
ization, the clinical hallmark of CPP is the symmet-
7 S. z9 E$ R% Nrical testicular growth secondary to stimulation by( ~( I+ u$ q- Q6 s' R# r
gonadotropins.1,3( D& Y; ^; Z0 F9 z
Gonadotropin-independent peripheral preco-# C A" m3 ^( G7 q4 l2 y
cious puberty in boys also results from inappropriate
: L$ L& P, k9 v5 k5 |9 vandrogenic stimulation from either endogenous or
. J% P: S& B; Z4 z" l: `exogenous sources, nonpituitary gonadotropin stim-; D6 K( V5 N* S
ulation, and rare activating mutations.3 Virilizing
2 p. d {, X& Y6 I1 Vcongenital adrenal hyperplasia producing excessive
- g' ~( B( [! j- _- o1 wadrenal androgens is a common cause of precocious+ }4 E! N+ @* i1 q1 w/ T
puberty in boys.3,42 W' I; B2 {! ^* Z8 T3 Q: E( R
The most common form of congenital adrenal& E) P# n/ p% W) |
hyperplasia is the 21-hydroxylase enzyme deficiency.% F3 J8 @. K# h8 d9 W, _. Y
The 11-β hydroxylase deficiency may also result in
! `7 m2 b: N5 w6 [9 D/ Xexcessive adrenal androgen production, and rarely,
* k, D& k! O& m7 G- T4 i9 t nan adrenal tumor may also cause adrenal androgen3 H7 v( a/ o' q0 [6 v( _
excess.1,3
1 P# ?8 v$ E: O: Tat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 P6 I2 c+ k3 R/ R+ ~+ Y9 ]
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
3 ^4 R& h+ v# R! _A unique entity of male-limited gonadotropin-
' u4 x8 l! U0 b- r: M# Uindependent precocious puberty, which is also known
5 k/ q6 H6 Y( m& Y- c: [* Yas testotoxicosis, may cause precocious puberty at a( E9 k# h; O( ?8 |! k0 a% V
very young age. The physical findings in these boys4 y; [# G$ K+ a& r
with this disorder are full pubertal development,! k/ m9 I W7 {/ X0 l- ^, s2 O
including bilateral testicular growth, similar to boys% r P4 j/ i3 l) N; J
with CPP. The gonadotropin levels in this disorder
8 p. a& u$ Q3 e3 nare suppressed to prepubertal levels and do not show
. n. k8 ~* S7 l* p! w8 \pubertal response of gonadotropin after gonadotropin-
9 Y9 C$ M8 w2 w! U Oreleasing hormone stimulation. This is a sex-linked
; D: P$ E) n2 J) Dautosomal dominant disorder that affects only- r$ ~; @# a5 J% j; d
males; therefore, other male members of the family
7 _3 t. p7 S8 e/ s1 _may have similar precocious puberty.3/ _; N7 Y8 [4 k( Z- f8 W
In our patient, physical examination was incon- l" C$ a$ X1 P% _
sistent with true precocious puberty since his testi-" ]6 E' G+ t. _9 R- k$ l0 M- j- m7 O
cles were prepubertal in size. However, testotoxicosis
0 B7 ]2 W* M' gwas in the differential diagnosis because his father
& y* x) M% f2 f v, T3 zstarted puberty somewhat early, and occasionally,
$ B2 M; p' R. b: atesticular enlargement is not that evident in the- ^6 z& h* G% u
beginning of this process.1 In the absence of a neg-
2 G% f+ U6 z( t Fative initial history of androgen exposure, our/ X0 v+ \" l. X$ z$ G% U4 ^
biggest concern was virilizing adrenal hyperplasia,' @1 _5 u' l, x/ s" T
either 21-hydroxylase deficiency or 11-β hydroxylase! k0 f* ^- E, H6 D# w f# E7 g- Z
deficiency. Those diagnoses were excluded by find-
: L' H5 R- R6 N) ? G) W/ j( Hing the normal level of adrenal steroids.1 H, K; }5 U2 Y# o( ^, [ U
The diagnosis of exogenous androgens was strongly* O# U; w# b/ |0 b* E) }. N1 k3 r
suspected in a follow-up visit after 4 months because
+ Y1 v* t3 M& K' n; g; L0 U( vthe physical examination revealed the complete disap-
6 M! l+ T' r9 Y; _8 w& O" V" Qpearance of pubic hair, normal growth velocity, and
; j" ~) k* m) b- Bdecreased erections. The father admitted using a testos-
$ O9 m: g, f' mterone gel, which he concealed at first visit. He was' F! Z" \: o8 ?0 o
using it rather frequently, twice a day. The Physicians’
% v) i+ U' d8 q" SDesk Reference, or package insert of this product, gel or4 [% ]0 D8 b+ p' _+ H0 e& c Y
cream, cautions about dermal testosterone transfer to
. L; U- z1 N, @# f4 `6 j/ }& \. Lunprotected females through direct skin exposure.
2 h1 H& [- K4 Q( G) ^" uSerum testosterone level was found to be 2 times the
6 s1 S6 o$ a& i5 F* _: ]baseline value in those females who were exposed to! P- G/ \' s: X$ g6 e5 M
even 15 minutes of direct skin contact with their male
! H" I! t% O$ N+ l8 H1 g) l5 {partners.6 However, when a shirt covered the applica-
" Y8 k, T, u7 Z. V% ~. X9 Ztion site, this testosterone transfer was prevented.
6 ~# Z0 g" F. W# fOur patient’s testosterone level was 60 ng/mL,) J/ J8 g$ r' E: q* f
which was clearly high. Some studies suggest that& {! j) a* [9 b' R) _/ T5 d, [% H
dermal conversion of testosterone to dihydrotestos- i7 c( B) |/ c; W6 I( R! |
terone, which is a more potent metabolite, is more
- I1 ^' ^ S9 ^. M* \! Kactive in young children exposed to testosterone
- K: L6 P$ @0 m- u7 P5 ^* Wexogenously7; however, we did not measure a dihy-$ y: k4 z/ _& ?9 \7 {# w
drotestosterone level in our patient. In addition to
2 C/ T; J% Z2 L" Z' E9 ^5 Ivirilization, exposure to exogenous testosterone in
/ p% d' ^( M7 i$ Zchildren results in an increase in growth velocity and8 Y6 L- @' a2 e
advanced bone age, as seen in our patient.
0 s) l1 d" \% g+ ?/ M7 r, Z4 XThe long-term effect of androgen exposure during
; O5 V5 o% t/ S' Z) ?! Fearly childhood on pubertal development and final7 T/ h4 [+ j6 X- |* z" P
adult height are not fully known and always remain
. I6 P$ \) |5 sa concern. Children treated with short-term testos-
+ A& M; u) a9 w; Kterone injection or topical androgen may exhibit some
7 n9 J: }3 y" l, O) q( Kacceleration of the skeletal maturation; however, after) D# R0 G3 x" M7 o
cessation of treatment, the rate of bone maturation
( e* L) u( f" I) `# xdecelerates and gradually returns to normal.8,9
/ H7 l+ L. @9 IThere are conflicting reports and controversy
" U% V, B8 M \, yover the effect of early androgen exposure on adult
6 L% M. u* h7 J; W' o4 G6 a, g+ p6 Qpenile length.10,11 Some reports suggest subnormal4 u& j+ ?6 P" H& [$ n$ ?
adult penile length, apparently because of downreg-
0 Z! P7 l8 d: a$ F5 K" v- y Y" T' t8 Yulation of androgen receptor number.10,12 However,
9 {4 v; T% r6 U- ~Sutherland et al13 did not find a correlation between2 G6 s/ y$ V+ F# T. J$ a6 A
childhood testosterone exposure and reduced adult) N! Q; Z5 P( P1 ?- d, e( V
penile length in clinical studies.
2 ?$ E/ q% _1 L7 iNonetheless, we do not believe our patient is$ x" G) v2 W2 ]
going to experience any of the untoward effects from* t U, L3 I) K3 J
testosterone exposure as mentioned earlier because
# E. r2 T* W( k# m" D$ `' w% n7 {the exposure was not for a prolonged period of time.
& R7 S+ d2 u* A. aAlthough the bone age was advanced at the time of+ d. C: L& z% G' L
diagnosis, the child had a normal growth velocity at& J& x/ x1 t R* z+ d+ {. X
the follow-up visit. It is hoped that his final adult
2 w% o4 n- q( sheight will not be affected.0 L8 P( y" E2 f7 y3 O: ]6 I4 E
Although rarely reported, the widespread avail-
: m: |3 D' p+ U# b+ F+ p9 o* rability of androgen products in our society may
) J4 F6 q8 }: |indeed cause more virilization in male or female
+ j: ?, }+ P7 ?2 echildren than one would realize. Exposure to andro-+ O: q" N8 W7 X: U
gen products must be considered and specific ques-
" b; p7 C$ [' B; s' r9 Ctioning about the use of a testosterone product or/ ?8 f4 F: B, u" G0 [6 ^5 W0 \& S
gel should be asked of the family members during
5 y, h' c# K; |) Y- t% ]2 ?the evaluation of any children who present with vir-8 h2 l+ C" U4 x" j0 e
ilization or peripheral precocious puberty. The diag-
. y) W% T# }* c- @nosis can be established by just a few tests and by: c( p) u' o- w! ?+ O
appropriate history. The inability to obtain such a6 f. p& ?' d$ _/ O0 e# [6 f9 t
history, or failure to ask the specific questions, may
$ b% }9 C3 t* \8 S I4 ?( Iresult in extensive, unnecessary, and expensive
7 Y$ q' T7 d! ?# E9 R' ` O8 K+ minvestigation. The primary care physician should be
* K l, T+ n8 ?! _. } uaware of this fact, because most of these children
; R% y, H7 R6 U- p4 w$ Ymay initially present in their practice. The Physicians’
! x- S6 b9 s7 B- I% x7 h8 BDesk Reference and package insert should also put a. O( l6 K# O% P: z
warning about the virilizing effect on a male or& Y# \( F9 t- ^+ S; B
female child who might come in contact with some-
( ^4 ^* T2 L4 {' L8 Bone using any of these products.+ R+ Q3 N1 V0 v% R+ n5 Z( g0 d3 @
References3 z* E. c1 U0 J' l8 f2 w: P+ @) b
1. Styne DM. The testes: disorder of sexual differentiation
* z5 q5 n$ i1 a% \" M& }5 d, q9 m2 uand puberty in the male. In: Sperling MA, ed. Pediatric
; M1 z: D7 \) @; c9 JEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
' s6 ?- ~+ T, \# h8 @! P7 R9 z2002: 565-628.
( S0 J5 [. l: c; s3 Z% H5 C2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
3 l1 m: V* E* N" `/ d7 Rpuberty in children with tumours of the suprasellar pineal |
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