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Sexual Precocity in a 16-Month-Old
% T+ m6 |3 b6 ?4 F3 O! r# I5 XBoy Induced by Indirect Topical$ n' |+ f/ t# d2 Q4 G
Exposure to Testosterone1 R( e! D3 b7 m' f# ^
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
' W) f# ^- Z& h- W0 F# |; \( u& `and Kenneth R. Rettig, MD1
1 f$ \, U# p8 l7 n% vClinical Pediatrics
6 l2 u' q* i9 b! X9 ], K9 g7 ^Volume 46 Number 6
m% k7 t9 P2 c* W+ D9 W8 b$ _July 2007 540-543
# n$ `: H$ B# T4 W/ T# E( i- N© 2007 Sage Publications
* y' M; D7 ?+ H9 r0 Z10.1177/0009922806296651
" ~ f* J7 I& c$ z5 E2 dhttp://clp.sagepub.com8 U* |' R! A/ v2 \) t s
hosted at# @ w+ |9 h5 G3 ]1 r
http://online.sagepub.com" O/ r9 b& W3 R4 m
Precocious puberty in boys, central or peripheral,( _ Q; W$ y1 ^ o8 r Z7 w
is a significant concern for physicians. Central7 v4 E2 @7 A# }7 l6 C) r5 t! Y. b! `
precocious puberty (CPP), which is mediated* T9 W9 i r: z. r: M$ p
through the hypothalamic pituitary gonadal axis, has( Y) O1 {/ q# k, _
a higher incidence of organic central nervous system( j3 D: k- @; W, [! l$ r1 x
lesions in boys.1,2 Virilization in boys, as manifested! P- p3 E1 m, N! C2 ~
by enlargement of the penis, development of pubic
2 ]! N) X' {* Z# m, yhair, and facial acne without enlargement of testi-
1 ?. }7 ?# [ ?8 a5 b8 gcles, suggests peripheral or pseudopuberty.1-3 We9 v, I$ j5 T* ]
report a 16-month-old boy who presented with the
9 p- T: p, D# N+ Wenlargement of the phallus and pubic hair develop-
+ ? X) U8 D8 j" c/ w. ?: kment without testicular enlargement, which was due0 N& g, y' y; g
to the unintentional exposure to androgen gel used by
0 v* q+ t" }) D$ K/ b+ ?, @5 \6 E! e( \the father. The family initially concealed this infor-; w1 N+ X9 C9 f" V5 r+ J
mation, resulting in an extensive work-up for this5 A/ f$ ^% y* J% Y8 m; s3 p8 P) x; J
child. Given the widespread and easy availability of
# z8 }0 ^/ ~8 v) J8 ]8 K/ a# N! k8 ptestosterone gel and cream, we believe this is proba-
0 [1 j) H5 }* k8 x1 g& jbly more common than the rare case report in the8 L5 `% [- U- S# C4 u) R
literature.4
' T7 d4 U( ]3 Q& ?$ lPatient Report! x& e. d+ q+ {
A 16-month-old white child was referred to the
; P8 [& ]6 E6 {3 q9 Tendocrine clinic by his pediatrician with the concern# M" ~7 V$ {, h" c; G" h
of early sexual development. His mother noticed" q% q' D8 ^' h4 J
light colored pubic hair development when he was
) T/ W4 z& ~2 D$ M8 t( t' l/ KFrom the 1Division of Pediatric Endocrinology, 2University of2 u' Y' G r+ t; ?0 F
South Alabama Medical Center, Mobile, Alabama.8 @" R7 m: x+ _5 [
Address correspondence to: Samar K. Bhowmick, MD, FACE,
5 M& Z) d" ^% @' t1 zProfessor of Pediatrics, University of South Alabama, College of8 }. Y- |' v7 p' K, j9 z
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;% P7 s0 z$ t% E: I
e-mail: [email protected].* r# @6 V3 o" g. _
about 6 to 7 months old, which progressively became
1 h- l4 ^" N$ e) J# wdarker. She was also concerned about the enlarge-9 h( C: f2 [" y
ment of his penis and frequent erections. The child; r J- G9 W- n% y) N9 U
was the product of a full-term normal delivery, with
" g$ U% F' g. O- Ja birth weight of 7 lb 14 oz, and birth length of. t, J' V& x c- R. R! J0 H
20 inches. He was breast-fed throughout the first year: ]$ y; Y+ S$ b) y0 T
of life and was still receiving breast milk along with Q1 _! s! w/ k' s5 {# @
solid food. He had no hospitalizations or surgery,
8 ~4 ?' r2 k T7 {2 ]( aand his psychosocial and psychomotor development$ g' P7 ~- T2 k, y
was age appropriate.$ ^/ W, d; B8 m9 _
The family history was remarkable for the father,
; a7 z) ]( D: z$ Q- y: e# I5 owho was diagnosed with hypothyroidism at age 16,$ h: _- b$ \9 O' t0 t2 ]5 g
which was treated with thyroxine. The father’s
( o9 o; g+ K7 N6 F; J4 T# sheight was 6 feet, and he went through a somewhat7 e! N3 F9 f- Q9 l. |
early puberty and had stopped growing by age 14.
2 P0 k4 F- P# q3 X0 gThe father denied taking any other medication. The: ?& B/ O( J1 z: f& N
child’s mother was in good health. Her menarche
1 ?, x' Q5 `# V- N0 Y, Z6 A9 x/ ]was at 11 years of age, and her height was at 5 feet9 Y I3 m: c$ s: g; c: F
5 inches. There was no other family history of pre-% T* o# _- m8 b m. j
cocious sexual development in the first-degree rela-6 r9 k$ ]8 S1 d. t: S/ H* k
tives. There were no siblings.
3 V8 y( O! G, u) j. E7 n5 s6 `Physical Examination4 l( R( `, U( R4 R! f) X
The physical examination revealed a very active,
- l( N7 U& U9 z0 E. bplayful, and healthy boy. The vital signs documented
h+ [, \+ A3 j% F0 p) a& Ua blood pressure of 85/50 mm Hg, his length was' Q% a5 z2 X) w" ]' P7 t; A' p) f) Q
90 cm (>97th percentile), and his weight was 14.4 kg, t- l% ]8 O, X9 U
(also >97th percentile). The observed yearly growth
# y% ~8 O9 B, R5 \( F- Svelocity was 30 cm (12 inches). The examination of* C0 l& G. p5 {1 o* r! u, N! ]
the neck revealed no thyroid enlargement.
! ]9 c8 r# o: \( F6 I2 ~) vThe genitourinary examination was remarkable for
+ z7 g- p* f( Fenlargement of the penis, with a stretched length of
; K& U: s9 C( I$ [3 H6 J; @8 cm and a width of 2 cm. The glans penis was very well
( h/ g. u4 `7 m tdeveloped. The pubic hair was Tanner II, mostly around
& s. L" ?& _! `4 T9 B' J) K5400 S) ^+ l5 Z, H3 d8 ?
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 ^8 R+ E3 z& }the base of the phallus and was dark and curled. The* k+ B" m0 J7 F. L
testicular volume was prepubertal at 2 mL each.- K, C7 L" y. w* p6 [/ f- C! J
The skin was moist and smooth and somewhat
% K3 |$ x( F4 P: Loily. No axillary hair was noted. There were no! H/ I$ s; O3 [ k- i# T
abnormal skin pigmentations or café-au-lait spots.
# C5 v7 J2 K! o4 w, q) VNeurologic evaluation showed deep tendon reflex 2+( U- F3 b! W9 O
bilateral and symmetrical. There was no suggestion
% O# R4 c) o! X1 z7 P9 Yof papilledema.
' p$ F5 k) e% y) m) y* X) K0 q; Z1 oLaboratory Evaluation
( t* ^2 I. u& s2 j( oThe bone age was consistent with 28 months by
* t# a; N" T( p h" s! N( Zusing the standard of Greulich and Pyle at a chrono-2 x: y+ J$ R/ {. }- u1 |
logic age of 16 months (advanced).5 Chromosomal
0 u6 b4 V6 W% ckaryotype was 46XY. The thyroid function test
$ U- r6 O3 p0 P9 A0 B+ n1 |* Hshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
) o7 P' T" c$ J% Q/ Ylating hormone level was 1.3 µIU/mL (both normal).! Q) A( m, B2 a8 }0 P3 {) i
The concentrations of serum electrolytes, blood" B- u: d1 o, P: J4 m* Z
urea nitrogen, creatinine, and calcium all were
A7 L# U f1 Z" n; Qwithin normal range for his age. The concentration
& D8 d1 U% @# y9 Rof serum 17-hydroxyprogesterone was 16 ng/dL% @2 j& ^. z) k6 \" U
(normal, 3 to 90 ng/dL), androstenedione was 205 u8 `' v7 ]" h$ H2 m
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
! d7 V" m6 \( { @/ P: Mterone was 38 ng/dL (normal, 50 to 760 ng/dL),
$ k W( p* p: y6 Y3 Tdesoxycorticosterone was 4.3 ng/dL (normal, 7 to; V5 x+ Y [7 }2 ]- j
49ng/dL), 11-desoxycortisol (specific compound S)+ {7 H) y+ C2 M1 P% B
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-. s; R( ^+ e8 `& P+ G- _ {3 t/ z+ l
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& i3 a5 r( O1 ]3 @
testosterone was 60 ng/dL (normal <3 to 10 ng/dL), N1 {7 k' z, z% m" t; o
and β-human chorionic gonadotropin was less than: b4 P7 d o: o
5 mIU/mL (normal <5 mIU/mL). Serum follicular1 v! _8 D% L6 ^1 M% v! c
stimulating hormone and leuteinizing hormone* }4 R( n* j0 |5 D1 u
concentrations were less than 0.05 mIU/mL4 }6 X- j9 _$ m1 M9 X$ Z
(prepubertal).
" ^" Y- T) w/ M* S; }0 n1 |; uThe parents were notified about the laboratory/ H6 L, @& ^: O, g% g# n
results and were informed that all of the tests were' N% x6 T9 R3 }; S9 h
normal except the testosterone level was high. The
. z; h0 P z/ n4 n- I% H- Dfollow-up visit was arranged within a few weeks to! @9 I1 E* u& h3 R; S9 s
obtain testicular and abdominal sonograms; how-
2 @ Y) @* e5 Y, i( v8 F5 c7 ]ever, the family did not return for 4 months.. w6 `) `5 J& v: E4 m
Physical examination at this time revealed that the
, P+ Q* i3 {5 _$ p3 I( _8 f+ ~child had grown 2.5 cm in 4 months and had gained
( z3 A# |/ K3 _* d2 kg of weight. Physical examination remained
! y0 x2 I7 O6 K# \unchanged. Surprisingly, the pubic hair almost com-+ `8 b# t, L. B+ A) {" I
pletely disappeared except for a few vellous hairs at
! j8 \, C: j, Q: J& p Nthe base of the phallus. Testicular volume was still 23 i, f. z3 h. I* s% E/ p* v' x
mL, and the size of the penis remained unchanged.- P; Q3 }5 x5 Q& E; V+ ~2 L
The mother also said that the boy was no longer hav-
8 p. z2 T/ E7 c" c1 sing frequent erections.* p6 }+ y* I& e2 s
Both parents were again questioned about use of: ?$ p) H9 j: p( E0 s$ K
any ointment/creams that they may have applied to( X5 B1 h) }" k6 ?
the child’s skin. This time the father admitted the% u# b9 \: m5 `; x* M" H1 i' G
Topical Testosterone Exposure / Bhowmick et al 541" n/ D# ~, M4 T' }& D
use of testosterone gel twice daily that he was apply-/ D# F! h2 }* }) T5 P( m& h# E8 k6 n, ^' A
ing over his own shoulders, chest, and back area for! x; e% s8 o% Q& q9 j
a year. The father also revealed he was embarrassed* \% N$ t D( j/ |$ R( c6 h! A
to disclose that he was using a testosterone gel pre-
- M9 D5 o& r& K4 ?scribed by his family physician for decreased libido
2 o" z5 i& w" Gsecondary to depression.: G6 k7 d- y2 f! A F
The child slept in the same bed with parents.; { K/ |. n/ e$ u" Z
The father would hug the baby and hold him on his( O! F I5 b, r% _) D6 N: }! R
chest for a considerable period of time, causing sig-3 T- V5 `* E8 J' W% {' ]0 z2 [! }( S1 f) y
nificant bare skin contact between baby and father.
1 t t8 F5 J0 m8 _$ QThe father also admitted that after the phone call,& K) Z8 a' T( b
when he learned the testosterone level in the baby
5 {7 Y5 Z2 c9 ewas high, he then read the product information
2 w) v- S9 s1 X+ r. zpacket and concluded that it was most likely the rea-+ b& S% {9 B) `4 Y# e6 h$ \: n
son for the child’s virilization. At that time, they& v4 H7 H$ ^% ^& \' E- L2 c" {8 [7 Q
decided to put the baby in a separate bed, and the+ }" x: j2 W) D# R& w. w& Y* m
father was not hugging him with bare skin and had' Y. U4 V( T4 l: P0 \: C% M
been using protective clothing. A repeat testosterone
4 r# S7 R8 G' R- y8 itest was ordered, but the family did not go to the
$ \3 h J) m7 V( u) x+ S3 F: plaboratory to obtain the test.- S. E. c/ Q5 z7 ?/ j
Discussion
- Z9 N. x8 z6 ~8 D. ^, bPrecocious puberty in boys is defined as secondary
& O5 C' \8 S- ~4 m$ Csexual development before 9 years of age.1,45 @$ ], Y1 H1 T2 g9 f
Precocious puberty is termed as central (true) when
1 V7 r2 a, B. n5 e4 x" ~0 pit is caused by the premature activation of hypo-
7 ~6 Y' F3 Z0 `6 i& H: [thalamic pituitary gonadal axis. CPP is more com-# U* f& P0 i$ L& y: `$ t
mon in girls than in boys.1,3 Most boys with CPP7 w/ }9 M9 S' d) O
may have a central nervous system lesion that is( Z1 ?+ k9 ^/ {- g3 {
responsible for the early activation of the hypothal-1 t8 O) p( w6 @( `- g4 V+ y
amic pituitary gonadal axis.1-3 Thus, greater empha-
' h: v3 K7 v% y, Wsis has been given to neuroradiologic imaging in
6 n- A7 ~! g, b6 P& U. S- T3 k, yboys with precocious puberty. In addition to viril-0 K# p4 |* G1 d% w
ization, the clinical hallmark of CPP is the symmet-
- }3 j q7 a) e8 ~: a* wrical testicular growth secondary to stimulation by0 | K5 R) b5 X& x
gonadotropins.1,35 ^- S( c* w# i$ d! \& Q: P
Gonadotropin-independent peripheral preco-
7 l- H7 w8 l' U' k/ o) R% C0 qcious puberty in boys also results from inappropriate
6 t e. E/ N7 y1 f, z1 r) }androgenic stimulation from either endogenous or( v/ [: ?0 _0 i& c
exogenous sources, nonpituitary gonadotropin stim-$ o2 Q: n* q5 P- D
ulation, and rare activating mutations.3 Virilizing' y2 ]4 T6 Y! D; j* D% Q! r: s
congenital adrenal hyperplasia producing excessive1 A) i2 H# Z# [( c* B' D9 h/ A
adrenal androgens is a common cause of precocious, E6 H$ M9 `0 Q+ B V7 }
puberty in boys.3,4
6 e' a l3 I- ^4 bThe most common form of congenital adrenal4 _- c# E+ n' }4 P
hyperplasia is the 21-hydroxylase enzyme deficiency.
' u( k4 f) G2 |: |! R9 A6 _7 w! \The 11-β hydroxylase deficiency may also result in! F3 b X3 X- V5 u! V2 z
excessive adrenal androgen production, and rarely,2 y* l: t6 S/ f8 W
an adrenal tumor may also cause adrenal androgen# ?$ a: A$ t6 b
excess.1,3
( c T4 X. G. {2 M* `at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& b2 c) E& b5 o) P: }9 o542 Clinical Pediatrics / Vol. 46, No. 6, July 2007* j% }0 }& v: C! I. y9 {
A unique entity of male-limited gonadotropin-
1 i3 G4 m1 F' Sindependent precocious puberty, which is also known
9 P: ~1 o a8 L0 m5 R+ X, Z$ l. Bas testotoxicosis, may cause precocious puberty at a
5 \1 i. f2 n& n. \5 U) Z' g& \very young age. The physical findings in these boys, S; }; q2 C" k4 [ _0 r. T
with this disorder are full pubertal development,
; e, {* Q' S8 t( v8 W* qincluding bilateral testicular growth, similar to boys1 r8 ]# K2 d# s+ E' W/ N
with CPP. The gonadotropin levels in this disorder
: F( s, n7 n2 u: c: G5 K" ~! Pare suppressed to prepubertal levels and do not show
) b( f% S* [, g, L! o) npubertal response of gonadotropin after gonadotropin-( c7 {# `3 o0 i, J/ @! q( d$ P
releasing hormone stimulation. This is a sex-linked- Q& \9 @' I7 }; n3 C' s
autosomal dominant disorder that affects only
' y" O3 o: T3 v0 Q0 ^2 ^males; therefore, other male members of the family
$ L+ i7 g$ d$ d2 `3 fmay have similar precocious puberty.3
; w8 r( D4 A3 y( B; e' b& VIn our patient, physical examination was incon-
0 N: N8 w) H B" f1 M6 s6 osistent with true precocious puberty since his testi-$ i' Y! W2 b G( z" f- i8 x
cles were prepubertal in size. However, testotoxicosis
7 z6 P4 r0 [1 |- x! z+ {& E `was in the differential diagnosis because his father
, R) D' ~+ a3 c& \# T; C# Cstarted puberty somewhat early, and occasionally,
! r* o" _" a& Z) d- S: ytesticular enlargement is not that evident in the# j2 ^$ N2 ]8 }3 C' p
beginning of this process.1 In the absence of a neg- O. s: M. W' z/ h" I
ative initial history of androgen exposure, our
( R1 O. w9 O& f: p+ mbiggest concern was virilizing adrenal hyperplasia,
! G. R7 R* v- m& V! z+ Feither 21-hydroxylase deficiency or 11-β hydroxylase3 m% X A4 L$ u4 f
deficiency. Those diagnoses were excluded by find-
* c$ B0 a( D2 d; {. e, G oing the normal level of adrenal steroids.; j0 x n* r+ ~3 P
The diagnosis of exogenous androgens was strongly3 X1 v J& g( m4 }7 _4 l& W6 f
suspected in a follow-up visit after 4 months because; s8 u$ s* `, {# w+ ^( o4 r3 D
the physical examination revealed the complete disap-
9 B& S! D. `2 D3 Lpearance of pubic hair, normal growth velocity, and
8 O! b& X" C" b% i* Q- A2 J2 |decreased erections. The father admitted using a testos-
' S( c0 L4 t* @& Hterone gel, which he concealed at first visit. He was5 v8 v. ?1 v" S8 D. K& {. }
using it rather frequently, twice a day. The Physicians’1 W. V) k7 C! z
Desk Reference, or package insert of this product, gel or$ ]; r( V& \$ Z; c0 F
cream, cautions about dermal testosterone transfer to; X' Q; P1 M8 R/ d% N; N
unprotected females through direct skin exposure.) l+ E% @0 R9 [4 F) a
Serum testosterone level was found to be 2 times the! K1 T6 r5 F+ p! l, M* Y
baseline value in those females who were exposed to5 v# u/ x$ |# e" ~ H: p
even 15 minutes of direct skin contact with their male
; p& f- S& l3 ^5 Z( j1 }) F' cpartners.6 However, when a shirt covered the applica-, [! ^, ?" S1 w% b7 ?; a
tion site, this testosterone transfer was prevented.# R9 I9 {+ p3 }# @: \' M7 C2 ?1 a% @
Our patient’s testosterone level was 60 ng/mL,: z$ ^4 k* @% \8 A* s% p" x1 D* h
which was clearly high. Some studies suggest that
: {1 J% [8 z3 O! K2 @. A/ Ldermal conversion of testosterone to dihydrotestos-3 W" L. B- Z8 o/ N
terone, which is a more potent metabolite, is more3 @0 W. \3 A5 J8 A i& H3 i. C0 F6 ^
active in young children exposed to testosterone
$ L ^2 o" A. e9 texogenously7; however, we did not measure a dihy-& `( u8 j5 W+ e( T
drotestosterone level in our patient. In addition to1 s+ Y( G: ] [0 z4 n3 Q& V
virilization, exposure to exogenous testosterone in: N. [# E; H" t5 L
children results in an increase in growth velocity and
& E' `3 c2 C5 C/ U) i: X5 dadvanced bone age, as seen in our patient.0 o' B. k, w$ b9 g$ B8 l" f
The long-term effect of androgen exposure during+ D4 i* c8 [ e& x" v
early childhood on pubertal development and final9 D3 R+ B8 V; v0 x& v, W4 q2 ^& e
adult height are not fully known and always remain
9 B+ L+ i. n [* ^; H% i2 B. Ba concern. Children treated with short-term testos-
9 w6 U& G8 Z4 sterone injection or topical androgen may exhibit some3 i( _- q5 u1 @, |% z, J }
acceleration of the skeletal maturation; however, after
' f& O5 @# _, m2 Vcessation of treatment, the rate of bone maturation
8 G* N8 A. O3 ?4 Edecelerates and gradually returns to normal.8,9
: ^% p2 s `& O* j4 a) a& ?There are conflicting reports and controversy+ E! _& V/ [( C! m. Q: z
over the effect of early androgen exposure on adult( w* u3 o$ r: K. T; L& `0 Q" I
penile length.10,11 Some reports suggest subnormal
5 E1 R, ^) e0 b' U) i0 kadult penile length, apparently because of downreg-
: `) D3 r, [4 i% W$ ]4 r* |0 \. Kulation of androgen receptor number.10,12 However,
# p& |. y$ w' C& N$ A* m/ dSutherland et al13 did not find a correlation between
' v& M, Y8 @; d* uchildhood testosterone exposure and reduced adult
! @8 D. j4 G) C' @$ [. S- c: Npenile length in clinical studies.) e A8 a W/ i# A8 ? u; i
Nonetheless, we do not believe our patient is
: T/ u) e4 c7 @* q; j! Zgoing to experience any of the untoward effects from
/ R. G+ c8 I$ e$ Htestosterone exposure as mentioned earlier because- W M( M5 L/ R5 r2 t
the exposure was not for a prolonged period of time.3 Z0 g2 d+ k0 Q
Although the bone age was advanced at the time of
& t. @* X0 w0 K' d5 R5 ^diagnosis, the child had a normal growth velocity at# d" {* H$ \7 A- A4 w( K$ H
the follow-up visit. It is hoped that his final adult
$ p, v( S" G3 f/ j9 ` z# a( Qheight will not be affected.
7 ^" n3 t1 E& y1 A& i1 Q7 l5 K; JAlthough rarely reported, the widespread avail-
, [/ {% x; q1 o. J4 V! tability of androgen products in our society may. E$ h& t& Z; y6 }7 B( T8 G
indeed cause more virilization in male or female1 B* G/ X& l. A( r9 N& s" |
children than one would realize. Exposure to andro-
" F' S) }" {6 Q( P. fgen products must be considered and specific ques-6 d; S" R+ X. d- r3 ?8 B( h
tioning about the use of a testosterone product or% {. i4 e! \$ j8 r/ S U. u; c: A4 J
gel should be asked of the family members during
3 c+ F! {+ l3 A/ ?0 a/ ]the evaluation of any children who present with vir-
2 t, Z6 n9 _. q+ bilization or peripheral precocious puberty. The diag-
; Y" C( l9 A- t- \6 `: V0 k% T( [nosis can be established by just a few tests and by
0 @$ k. P+ |( C9 N/ aappropriate history. The inability to obtain such a
0 [* K }6 }9 Yhistory, or failure to ask the specific questions, may
% S! J+ L3 P9 a0 j( Yresult in extensive, unnecessary, and expensive
3 Q8 {$ S' `" z- Iinvestigation. The primary care physician should be7 a( j, d3 a* w" k2 x _% r8 Y
aware of this fact, because most of these children) V8 }% e& `1 k/ x0 S
may initially present in their practice. The Physicians’
! u& y1 J& T5 ^( ]Desk Reference and package insert should also put a6 n5 e7 I* K8 Q& Q
warning about the virilizing effect on a male or% a; L# @" f5 S* O( J
female child who might come in contact with some-
/ k& O% a4 T% f: [9 s7 hone using any of these products.
- ~' u* G% v! X( tReferences
$ P& D) k4 }) d8 l& m1. Styne DM. The testes: disorder of sexual differentiation
4 l8 I# m6 O; f/ Dand puberty in the male. In: Sperling MA, ed. Pediatric6 N: V+ g! R1 W9 f! u$ A6 c2 V# |
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
: C: |, s4 f: Q9 i& C2 r/ ~+ B' [2002: 565-628.
7 Q( {8 m6 v6 ]' N; L6 x3 v2 \2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious4 E/ H [, U' P7 h
puberty in children with tumours of the suprasellar pineal |
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