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Sexual Precocity in a 16-Month-Old
' p! j0 \' |1 a, e$ Q$ uBoy Induced by Indirect Topical+ ? y1 u" v0 p$ Q0 L9 ^* o
Exposure to Testosterone
/ v i; t6 i3 l+ H# Z" y: P7 s! NSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2) g! S s8 d3 G' P
and Kenneth R. Rettig, MD1' l, C- H! {# x& E* L' a- r. M6 `
Clinical Pediatrics4 f- t6 p. m% ~ }4 k. ~" I
Volume 46 Number 6
' L9 |; ^: J- X0 k0 VJuly 2007 540-543
5 \' f& W( U8 K/ k& O% ~© 2007 Sage Publications
5 v- t6 N5 @( N# A10.1177/0009922806296651
7 o# B" e4 C. L( F& Q( yhttp://clp.sagepub.com+ g+ ?& \$ t' B W5 o' \" p
hosted at
+ z4 v. O2 J* N' Hhttp://online.sagepub.com* A" W. P: R% x# O- K! |5 C
Precocious puberty in boys, central or peripheral,6 J. M* i3 |+ E7 K5 W( \
is a significant concern for physicians. Central
3 ? m& q( z( yprecocious puberty (CPP), which is mediated q" _$ `5 ~( X# Y$ e0 d5 R
through the hypothalamic pituitary gonadal axis, has4 \6 `9 ^8 c, t w: }& `
a higher incidence of organic central nervous system
8 {* U# v2 \! S8 j9 t7 w: Ulesions in boys.1,2 Virilization in boys, as manifested
1 O& u4 @7 p O. c% m8 zby enlargement of the penis, development of pubic
$ _/ p4 S5 `# X3 ]hair, and facial acne without enlargement of testi-0 [: L- X; |6 o7 ]1 L2 u+ |2 |4 h
cles, suggests peripheral or pseudopuberty.1-3 We" p! |' n) Z( d: Y/ r8 U; M+ y. f2 e
report a 16-month-old boy who presented with the6 R4 E8 p4 g# {* W0 l0 q% g7 Q
enlargement of the phallus and pubic hair develop-6 z8 [) u5 k* e5 t1 N
ment without testicular enlargement, which was due
' x1 Y$ o" N3 ?; T: X1 Xto the unintentional exposure to androgen gel used by
& n6 O- s9 \+ P2 P5 D. a. Zthe father. The family initially concealed this infor-
. x% O* c# P" Qmation, resulting in an extensive work-up for this( ?$ Q% C4 c) q
child. Given the widespread and easy availability of
$ H8 w8 X5 }* C! c8 t4 B+ _1 `testosterone gel and cream, we believe this is proba-+ k" ~& T9 S$ o o+ X: w+ l3 K0 B3 f
bly more common than the rare case report in the9 ?* f# |, o5 Z8 C( i+ K Y7 |' a
literature.4( j/ e5 ~# i. N1 A3 v/ Y# e
Patient Report0 u: ~+ x, |+ W$ z- r
A 16-month-old white child was referred to the
: w B- L" ?: z0 r. Gendocrine clinic by his pediatrician with the concern4 C, D* Z- R# M0 U1 n
of early sexual development. His mother noticed
* k" Z! i/ p/ y' o+ {light colored pubic hair development when he was7 X: L5 X& u* U+ H# @5 ]
From the 1Division of Pediatric Endocrinology, 2University of. ^# T8 N& q' w; I1 s- @
South Alabama Medical Center, Mobile, Alabama.( J4 ]! C/ L9 }
Address correspondence to: Samar K. Bhowmick, MD, FACE,, {1 C4 l/ r8 g& [
Professor of Pediatrics, University of South Alabama, College of9 Q% U- n0 n: Z9 L! a
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;6 ?7 E% Y+ Z; P" Y) l: F3 l, G, X
e-mail: [email protected].
, H8 Q: i$ Q" R! d$ `/ Sabout 6 to 7 months old, which progressively became& `, d [: H& n7 V& M
darker. She was also concerned about the enlarge-
7 _* V' A/ q1 v6 Pment of his penis and frequent erections. The child0 c7 w% S" j7 r! E8 `
was the product of a full-term normal delivery, with
; r5 T' b* n7 {- Fa birth weight of 7 lb 14 oz, and birth length of
& E9 e3 Z" p" P2 O- b' X20 inches. He was breast-fed throughout the first year
) v& V: ^+ F3 E: q$ T4 Jof life and was still receiving breast milk along with
- m5 p7 |& X5 H1 ?solid food. He had no hospitalizations or surgery,
/ M5 k! h, m/ H' x ]5 _0 A) Land his psychosocial and psychomotor development
- j/ V4 b! R' f& n: Jwas age appropriate.
- q3 X! S+ i5 f: DThe family history was remarkable for the father,
+ z5 V, _7 w, a/ Y' L$ owho was diagnosed with hypothyroidism at age 16,, \8 l& E, s4 F( k. y
which was treated with thyroxine. The father’s
) o7 B6 a- _" g0 e5 C% k4 ~height was 6 feet, and he went through a somewhat
8 J- D: |0 l ]5 |early puberty and had stopped growing by age 14.# h& i4 g- p$ I
The father denied taking any other medication. The
# o) R0 m1 t' p9 v. K3 k4 _" l9 schild’s mother was in good health. Her menarche7 L! [$ M+ t9 c/ e8 b6 B& ]
was at 11 years of age, and her height was at 5 feet7 v8 o; S$ _' N" j z/ [- K
5 inches. There was no other family history of pre-3 ]6 \5 D% z! v& s/ o
cocious sexual development in the first-degree rela-. v$ }- ~5 L* `) ?! @# h
tives. There were no siblings.
) {2 F4 [1 B$ n9 G! e1 KPhysical Examination( q2 r7 G! v* g# q/ a
The physical examination revealed a very active,
! \/ J6 S9 O% z Xplayful, and healthy boy. The vital signs documented Y+ w; C9 i1 v
a blood pressure of 85/50 mm Hg, his length was7 a4 P! M' Z$ ~% D
90 cm (>97th percentile), and his weight was 14.4 kg, r$ r# X3 @. E0 Z/ b
(also >97th percentile). The observed yearly growth
* L' } s B8 v* a% n$ R' wvelocity was 30 cm (12 inches). The examination of
" v9 a( J/ p6 U" d; }& b) \, fthe neck revealed no thyroid enlargement.% D! M* H |' p5 w! }+ O: M
The genitourinary examination was remarkable for
E& E& r* A" zenlargement of the penis, with a stretched length of1 v6 j& l* P/ x u# Q5 o, D
8 cm and a width of 2 cm. The glans penis was very well
. O# P9 Z6 q' ]' q: t& Y8 Ldeveloped. The pubic hair was Tanner II, mostly around
1 Z; \9 C; c4 p6 ], |540
9 {9 O) o& W! d! H* Dat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ z) Q& x9 s- L/ U! o( u
the base of the phallus and was dark and curled. The, N% c8 r4 ^+ \' O4 q, h5 ]
testicular volume was prepubertal at 2 mL each.7 ^1 i* C5 ]5 w' s# c
The skin was moist and smooth and somewhat) U6 F3 }- J. x# U
oily. No axillary hair was noted. There were no' h$ M! `* B, {- l% }! H" T3 [: @3 p
abnormal skin pigmentations or café-au-lait spots.% J9 G; I- h; F+ z" n! m" e% n
Neurologic evaluation showed deep tendon reflex 2+, C, B8 \! l% \5 L
bilateral and symmetrical. There was no suggestion
& J( v" A" i% S! S. v0 ~ } Rof papilledema." c$ a" f6 y& |* G5 y
Laboratory Evaluation- m) c+ i; e# S# J
The bone age was consistent with 28 months by
/ S* a# z7 a* e* V: `/ [using the standard of Greulich and Pyle at a chrono-
3 E. f7 e* w" ^( V8 ~logic age of 16 months (advanced).5 Chromosomal
& h* b; v3 k( v2 p& V qkaryotype was 46XY. The thyroid function test
: T8 C4 Y+ |1 C+ e! L6 n9 r/ h2 {showed a free T4 of 1.69 ng/dL, and thyroid stimu-
; M4 ~% M* N8 x1 s8 r; V4 llating hormone level was 1.3 µIU/mL (both normal).3 C6 N$ X; ?' l& k( U
The concentrations of serum electrolytes, blood' ~/ t- u" @4 Q
urea nitrogen, creatinine, and calcium all were' b: H& o1 w2 q4 _5 j/ G5 k- N
within normal range for his age. The concentration
5 P/ m% P. u1 T. i# [' pof serum 17-hydroxyprogesterone was 16 ng/dL z7 w8 e; A' X0 T* J5 l
(normal, 3 to 90 ng/dL), androstenedione was 208 U$ \0 A# l3 Z& g
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
5 c0 e( W4 \: B, {0 I& R/ P. Xterone was 38 ng/dL (normal, 50 to 760 ng/dL),2 J3 s; K8 c6 h" v: w) ^2 H
desoxycorticosterone was 4.3 ng/dL (normal, 7 to/ v. ~! o$ A7 U& x0 W% N
49ng/dL), 11-desoxycortisol (specific compound S)' h% D* n: j8 m3 |
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
! V+ o. R u' C4 z# utisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total+ ?7 i- U3 Q& Z/ a/ ^$ ?: H
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),- A0 E9 b, \1 o- t0 X S
and β-human chorionic gonadotropin was less than- W v. Y5 Y4 ^3 a: G+ P( \
5 mIU/mL (normal <5 mIU/mL). Serum follicular
- R, |/ y2 f) m( \ w- q, W, ^+ }stimulating hormone and leuteinizing hormone. X$ x) t+ P8 u- r5 v* T
concentrations were less than 0.05 mIU/mL& g; l7 e) w4 h1 N. ?* N+ z
(prepubertal).6 N4 L4 K' @+ T0 Q# ~* O
The parents were notified about the laboratory
. C5 k- n3 s5 }: E, Kresults and were informed that all of the tests were
- E0 v$ I( V1 K( n. E$ E) W2 onormal except the testosterone level was high. The
/ g! B+ x* g: R5 A; } mfollow-up visit was arranged within a few weeks to
4 E" I% k- o5 |$ m; Dobtain testicular and abdominal sonograms; how-
* F# a0 r l+ Y4 k# Hever, the family did not return for 4 months.
Q) Z2 G( d9 `7 `) T0 |Physical examination at this time revealed that the
: S2 N7 r7 r1 h4 zchild had grown 2.5 cm in 4 months and had gained
$ @% |$ R- v) @0 F4 g4 c6 A# c. g2 kg of weight. Physical examination remained* G4 q# ?2 ]: h) k5 [
unchanged. Surprisingly, the pubic hair almost com-
) e% x7 q% H. |3 k5 S; Z( P3 j5 Lpletely disappeared except for a few vellous hairs at
5 ^. Z, @7 _* @+ L3 u( Ethe base of the phallus. Testicular volume was still 2# y; a, `2 E# ~' `. E. |
mL, and the size of the penis remained unchanged.9 N% L5 C/ s! Z5 o/ E: [
The mother also said that the boy was no longer hav-# D( S7 Q. s# ~ u; X- C7 E* V
ing frequent erections., Y$ k9 D: u7 t. s0 R: ] c7 s+ P; o
Both parents were again questioned about use of$ R- C3 ~' v, _, O
any ointment/creams that they may have applied to
7 x5 V% E: T. Rthe child’s skin. This time the father admitted the
& T' _2 J+ Z0 yTopical Testosterone Exposure / Bhowmick et al 541
! {9 t/ m' K' E. P0 R, Y- c2 |, muse of testosterone gel twice daily that he was apply-
) I1 C* J6 `3 A" xing over his own shoulders, chest, and back area for h( n" E, p$ e7 I
a year. The father also revealed he was embarrassed
! K8 a. }1 S( H, }to disclose that he was using a testosterone gel pre-
' S6 j2 ?7 p: gscribed by his family physician for decreased libido5 I: I/ h/ ^( b
secondary to depression.7 g; O5 ^6 k2 l
The child slept in the same bed with parents.
7 m# m a: j+ h' k9 EThe father would hug the baby and hold him on his8 H, N3 E4 C/ ~# I8 K9 y* L3 i& A$ V6 I
chest for a considerable period of time, causing sig-5 V% Y& @) f4 d$ p7 @% V
nificant bare skin contact between baby and father.
L- |2 J! Z t5 ]" K- {+ B- \The father also admitted that after the phone call,4 K( }4 G% _4 \$ B
when he learned the testosterone level in the baby9 W( |$ T6 w. e: t9 g( K G
was high, he then read the product information4 B% U4 Q; T/ P2 S, j3 q
packet and concluded that it was most likely the rea-% P& q5 q) u5 ]! d+ W
son for the child’s virilization. At that time, they
& |. p- G8 L' `. }( kdecided to put the baby in a separate bed, and the$ g. C2 `# o0 [7 u
father was not hugging him with bare skin and had
/ ^. C1 J; P+ A w: Vbeen using protective clothing. A repeat testosterone& @0 [7 ~; N3 k# O
test was ordered, but the family did not go to the
9 [9 I0 ]* t4 T; D, w: Q; T$ Jlaboratory to obtain the test.
: W8 H# K( ?+ z: |; n0 cDiscussion
( @( H! F/ C0 O! s; `$ o2 gPrecocious puberty in boys is defined as secondary
' k8 w9 a/ @* L9 V7 R, ysexual development before 9 years of age.1,4! y6 r) T& @! W+ {3 _! s4 Q+ C
Precocious puberty is termed as central (true) when# ~5 p! u: ~. M0 I
it is caused by the premature activation of hypo-- g! `1 r E" c
thalamic pituitary gonadal axis. CPP is more com-
3 S7 ^) F( P4 D& c- P+ `1 M! Y5 wmon in girls than in boys.1,3 Most boys with CPP+ n) w7 L6 N$ s9 V) h( c2 l
may have a central nervous system lesion that is7 v3 V+ T0 ?0 F1 @/ Y+ Q* h6 P
responsible for the early activation of the hypothal-
1 l- ^" k% v Z1 M3 W' `# j: Bamic pituitary gonadal axis.1-3 Thus, greater empha-3 `. H, @7 i8 P2 \
sis has been given to neuroradiologic imaging in7 @! r, P3 Z% [+ F" e3 {
boys with precocious puberty. In addition to viril-
8 H( }" y) c' q: Bization, the clinical hallmark of CPP is the symmet-
. R" y6 v. M0 H/ t& |% H/ ]rical testicular growth secondary to stimulation by
, T. j+ f2 d9 u" `7 Egonadotropins.1,3
" N' h: b& j# u# j8 }Gonadotropin-independent peripheral preco-9 _9 w% J8 X; ~2 G& r. @
cious puberty in boys also results from inappropriate5 Y6 y V1 M0 l$ f
androgenic stimulation from either endogenous or; o4 ~% w" h3 n9 I
exogenous sources, nonpituitary gonadotropin stim-5 E' w, \* Q, M$ S% F2 I g
ulation, and rare activating mutations.3 Virilizing& X, t3 n& U. H) c5 P0 \
congenital adrenal hyperplasia producing excessive
& U; f$ D+ a) {3 B- \6 L" Kadrenal androgens is a common cause of precocious
4 v+ {! K3 \4 ~* ~puberty in boys.3,43 g0 g- A6 X2 w
The most common form of congenital adrenal- d! V; P9 z9 R$ g# @/ p0 N
hyperplasia is the 21-hydroxylase enzyme deficiency.
S+ V- O) D- y- E) wThe 11-β hydroxylase deficiency may also result in* r2 ^ P% ^6 {4 Z: X5 M
excessive adrenal androgen production, and rarely,
2 a9 `; K7 `: V: A8 L5 t9 San adrenal tumor may also cause adrenal androgen' ~) P$ ]1 w, j% K# M) H' T9 }4 o
excess.1,3- d$ B4 ~3 G2 Q3 t- e
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, t- U/ F9 d9 q. g1 C542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
2 M# @8 r0 m& RA unique entity of male-limited gonadotropin- e$ F7 R4 r4 x- H# D
independent precocious puberty, which is also known5 J9 z4 A& L5 H! p+ ?
as testotoxicosis, may cause precocious puberty at a
7 K |( i: Q1 E4 N+ w4 g2 tvery young age. The physical findings in these boys
0 i" ^4 Z" M6 W' v' X8 _- s6 o6 twith this disorder are full pubertal development,' H$ d9 Z0 k0 P. t6 M
including bilateral testicular growth, similar to boys
8 c: S. t5 t$ k Jwith CPP. The gonadotropin levels in this disorder) I& a( ?* Q2 n j! o
are suppressed to prepubertal levels and do not show5 R- m: Q) h g: M0 q% u. l
pubertal response of gonadotropin after gonadotropin-
" Z. K. l* n8 C# Q7 C% I6 p9 [releasing hormone stimulation. This is a sex-linked
5 a) l: W$ [1 W, l$ yautosomal dominant disorder that affects only
" q; ? {8 Z4 _males; therefore, other male members of the family! \$ K& L2 m8 T
may have similar precocious puberty.3+ v9 a$ r& F; z
In our patient, physical examination was incon-
' b8 g3 p& x4 S! s# X$ o6 k" ^sistent with true precocious puberty since his testi-+ X3 v- o& D9 ^% N4 }* D9 l
cles were prepubertal in size. However, testotoxicosis
2 w) D& [7 O ^was in the differential diagnosis because his father# P: u1 {: A) w% W1 Y( S! X7 H
started puberty somewhat early, and occasionally,
- d1 M6 c) R, B) Btesticular enlargement is not that evident in the6 k/ B$ A7 {3 k% I% a$ r
beginning of this process.1 In the absence of a neg-7 {! t) ]6 Z3 E* _: }0 c
ative initial history of androgen exposure, our
+ ~$ ^+ E) E7 d- e* U2 X9 Sbiggest concern was virilizing adrenal hyperplasia,
- \/ Y: y& O j8 D& @& C* Deither 21-hydroxylase deficiency or 11-β hydroxylase+ P" A6 P* u2 s6 J
deficiency. Those diagnoses were excluded by find-
8 D4 V' }1 A3 E! y* [ s; }ing the normal level of adrenal steroids.% D& r- M) G: i$ N' `
The diagnosis of exogenous androgens was strongly
& ?8 A. n Q4 T0 Zsuspected in a follow-up visit after 4 months because
x3 J$ {% `& D* D4 A* r& xthe physical examination revealed the complete disap-! W( Q7 h2 z) P6 H4 r% y
pearance of pubic hair, normal growth velocity, and
' g( ?0 w, \ J1 J8 @6 l" v; mdecreased erections. The father admitted using a testos-2 n& ?/ h7 n9 @3 J
terone gel, which he concealed at first visit. He was
3 u: O" D% Z4 n0 {2 Busing it rather frequently, twice a day. The Physicians’
( F* d$ G7 f! M/ K `% ? r( ~Desk Reference, or package insert of this product, gel or
# [! Z @6 ~: S. \: Ncream, cautions about dermal testosterone transfer to5 }6 p+ B9 t7 O( l
unprotected females through direct skin exposure.7 ^2 \/ O4 I9 X, p
Serum testosterone level was found to be 2 times the
, k9 T6 K5 S2 \baseline value in those females who were exposed to& h1 m# Y; D8 |% _# b! h5 E& z9 @2 {+ y
even 15 minutes of direct skin contact with their male
$ F' N8 L! ~, S: _- |* `3 ipartners.6 However, when a shirt covered the applica-+ ~9 Z' j: d5 H
tion site, this testosterone transfer was prevented.
W$ n5 Z$ Y( v/ e5 V+ l. uOur patient’s testosterone level was 60 ng/mL,, b5 @5 H- g, j
which was clearly high. Some studies suggest that
Y/ \' U5 h0 R+ j; [4 c4 edermal conversion of testosterone to dihydrotestos-
v; @& ?2 J, p# yterone, which is a more potent metabolite, is more P: l! m& Z; g/ r2 K
active in young children exposed to testosterone
2 t' S5 q$ u. x$ \5 vexogenously7; however, we did not measure a dihy-+ @& ~# Y: F' C4 w1 l
drotestosterone level in our patient. In addition to3 J2 Y. n& G* h
virilization, exposure to exogenous testosterone in
! {; l( |- z& i, M1 m, bchildren results in an increase in growth velocity and( t7 J/ a$ a1 M* a
advanced bone age, as seen in our patient.2 u, s2 ]1 s h" {+ |
The long-term effect of androgen exposure during
) B8 S3 O4 |4 n& Z( n. wearly childhood on pubertal development and final
8 v' y2 s' g2 k4 D( Iadult height are not fully known and always remain- f; k; A- O* `
a concern. Children treated with short-term testos-. k# P0 A1 F1 M5 G7 r
terone injection or topical androgen may exhibit some0 L" F5 h% {/ H: ^" ~ Q% }
acceleration of the skeletal maturation; however, after7 o/ D. y6 m/ P) \* e3 h* H
cessation of treatment, the rate of bone maturation
1 q" R; w* U. U8 k& kdecelerates and gradually returns to normal.8,9
- s) c1 w" L4 U9 a3 ]7 K dThere are conflicting reports and controversy. P0 ^! |' D5 v: q: r; K
over the effect of early androgen exposure on adult
+ w4 l- \8 Q0 z( k0 Rpenile length.10,11 Some reports suggest subnormal
! l" u1 d$ _2 k" \* k) Y) ]adult penile length, apparently because of downreg-
- O' t2 {! u$ E" x Zulation of androgen receptor number.10,12 However,
1 U; @) ~! L2 ~4 ]+ oSutherland et al13 did not find a correlation between
( ?6 C. u" R* J" N" [' V$ u& r# Achildhood testosterone exposure and reduced adult
, S+ t3 H, L/ Y. O6 q$ epenile length in clinical studies.
5 i/ O1 m5 f1 y+ A0 CNonetheless, we do not believe our patient is
) e) i/ u3 s' Zgoing to experience any of the untoward effects from
; ]& n, s- Y, m0 O7 l% P Ytestosterone exposure as mentioned earlier because5 {$ n7 B/ ^$ j5 P0 e' Y+ l7 _0 V
the exposure was not for a prolonged period of time.
$ m' C h9 @) vAlthough the bone age was advanced at the time of
2 W5 S; p6 E3 \: W: v% h% wdiagnosis, the child had a normal growth velocity at d& A" p6 x3 H2 W- ]) x. t
the follow-up visit. It is hoped that his final adult
. I" E# @* ]; u9 ?7 V- H2 \# P! Rheight will not be affected.% |& p3 m+ L0 O/ v3 T8 [: f4 ?
Although rarely reported, the widespread avail-1 ` U! g2 s5 e& A+ X* d) c7 R. ~# H
ability of androgen products in our society may R- E& g( y0 H5 W
indeed cause more virilization in male or female' I4 ]3 l. a+ m; e) a
children than one would realize. Exposure to andro-
0 O/ c9 s+ G# v. t6 _' w3 j2 Zgen products must be considered and specific ques-; R; ^ r& W# f1 m
tioning about the use of a testosterone product or" G! j/ R5 `) J8 l- N8 D% z; {& M
gel should be asked of the family members during/ N9 ?7 _* r$ p/ A8 J
the evaluation of any children who present with vir-
3 e: z# s* U& Q( xilization or peripheral precocious puberty. The diag-8 X7 v0 u, Y. N% d7 Y# C% R; v
nosis can be established by just a few tests and by
^+ \7 e! _5 o2 n) Wappropriate history. The inability to obtain such a
+ f3 U* X+ b8 Dhistory, or failure to ask the specific questions, may+ q( `7 a1 |; g1 i$ N
result in extensive, unnecessary, and expensive
3 L! {; @! B5 N. finvestigation. The primary care physician should be' {* w0 N0 B3 `3 Y1 X# ]
aware of this fact, because most of these children/ I1 [" C1 |$ ]: K8 P |! d5 w! x
may initially present in their practice. The Physicians’
: E& V7 ?5 g* c! ]Desk Reference and package insert should also put a9 Q& l: O9 ]' c
warning about the virilizing effect on a male or
2 l* D, ~$ z; E# s. Cfemale child who might come in contact with some-( _& g; n# u7 U$ }& B" Q
one using any of these products.
, J6 k: c5 J1 L" ^7 ZReferences
# Z" H# O. l" {3 P' b1. Styne DM. The testes: disorder of sexual differentiation
. _/ r: P$ \/ f" @: tand puberty in the male. In: Sperling MA, ed. Pediatric0 _% w7 K: k( Q
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
3 _ {) S& r: Z1 e% }% B) ~2002: 565-628.
2 U: {& C/ z9 k& M$ H4 V( b2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 t7 H7 r5 B& M4 k; j$ w( }* X3 v
puberty in children with tumours of the suprasellar pineal |
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