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Sexual Precocity in a 16-Month-Old
" A2 x( Q( c" H/ _# W0 WBoy Induced by Indirect Topical
g3 v" d) v; U" \% g2 ]0 a/ xExposure to Testosterone
9 `) E( s$ K$ e! _) n8 `Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
9 I8 Z6 G: |9 l# E* I1 Land Kenneth R. Rettig, MD1
0 M. y4 {5 u ?* j7 Q. Y NClinical Pediatrics) Y5 _/ c1 R ]6 E; T
Volume 46 Number 6
# I) B- W8 r. e) |July 2007 540-543# \ t& j; T/ _, ]# N! _# T5 c
© 2007 Sage Publications
" U6 \4 u+ F" Q( x; a10.1177/0009922806296651
9 o9 B( D% \! F* c- N2 H% I7 p/ C0 s; t( |http://clp.sagepub.com- l9 l. a @& s a
hosted at
: v+ P! L1 B1 Ihttp://online.sagepub.com" a$ x! i" L+ }& z3 J" N# e9 H
Precocious puberty in boys, central or peripheral,
1 t- J7 ^9 u* r: O8 zis a significant concern for physicians. Central; [4 V7 I3 L3 W/ y# N
precocious puberty (CPP), which is mediated6 V0 s4 P8 r# H; a5 O6 C. D. [
through the hypothalamic pituitary gonadal axis, has8 N$ R- @2 S- p7 ?; x/ a: p5 d
a higher incidence of organic central nervous system
& s) q. `1 ]# hlesions in boys.1,2 Virilization in boys, as manifested4 p5 [/ `9 m* {5 w R( V
by enlargement of the penis, development of pubic
- N" T8 a. I+ `7 x+ [2 Z4 Ghair, and facial acne without enlargement of testi-8 T7 F6 `3 s; [0 i9 r
cles, suggests peripheral or pseudopuberty.1-3 We' S1 [( h" B* D$ q
report a 16-month-old boy who presented with the
6 A4 P5 v. T0 _9 @, v; Xenlargement of the phallus and pubic hair develop-* V, G$ ]! M& g
ment without testicular enlargement, which was due* t" J0 _. r! C, n1 [& g1 b
to the unintentional exposure to androgen gel used by
% [) O$ |# ^$ r" G) N3 Athe father. The family initially concealed this infor-
0 u: k' K4 S9 C% v" imation, resulting in an extensive work-up for this
: e* Q5 n1 ?' y0 nchild. Given the widespread and easy availability of
) C/ Y# S: n1 [% z+ Vtestosterone gel and cream, we believe this is proba-! l1 t7 A) v( X$ G' o4 ~
bly more common than the rare case report in the) d6 o6 ^5 R5 P% }
literature.4
) b% O: R8 ?: Z; lPatient Report
" g7 A( E% F9 P' N s% t$ [ pA 16-month-old white child was referred to the( Q5 s) o# `" U5 X9 ^' `
endocrine clinic by his pediatrician with the concern
z% {; x0 s Y# C! r2 s- q( Jof early sexual development. His mother noticed
h) _ p* I! T% O( y& ` Mlight colored pubic hair development when he was) A4 j. W2 D5 ^5 W7 |+ a: r0 P
From the 1Division of Pediatric Endocrinology, 2University of
/ Q: Z: r) A d& h4 R* jSouth Alabama Medical Center, Mobile, Alabama." ^% u) w! c. M! e, V
Address correspondence to: Samar K. Bhowmick, MD, FACE,
4 a: o+ i2 M; O5 mProfessor of Pediatrics, University of South Alabama, College of( L& n7 N [8 U$ t0 c+ f. I
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
" t% d) _! |" L- m$ qe-mail: [email protected].
# A: @$ m2 w9 habout 6 to 7 months old, which progressively became( l1 t) w1 a P2 g0 y R* K* s
darker. She was also concerned about the enlarge-* H. D2 k$ G6 M4 Q$ V
ment of his penis and frequent erections. The child9 S( s3 M" i9 \4 p5 s$ I
was the product of a full-term normal delivery, with
, F# E+ K. s0 B9 T+ aa birth weight of 7 lb 14 oz, and birth length of
; l! @( [: C$ `5 w' U: u% z20 inches. He was breast-fed throughout the first year4 r, `- P& S& f% o
of life and was still receiving breast milk along with- ?: W' f# ^' _. @
solid food. He had no hospitalizations or surgery," }9 c. J [5 Q0 U% x. ~
and his psychosocial and psychomotor development; r8 w2 v2 U2 V M8 Y/ K
was age appropriate.
" J7 _" L+ g3 E; SThe family history was remarkable for the father,
+ [; v1 H1 x# j1 e* B+ j) n7 pwho was diagnosed with hypothyroidism at age 16,
% N6 E" Y# S9 Owhich was treated with thyroxine. The father’s
0 V+ x; o- Y7 z: D( g/ ?) Nheight was 6 feet, and he went through a somewhat+ \) u% Z, S9 }/ D
early puberty and had stopped growing by age 14.
: c9 V: n; I7 `) q0 R KThe father denied taking any other medication. The
" E7 t- K$ k6 G' Xchild’s mother was in good health. Her menarche$ B0 k _/ |# ?7 J2 p, \1 i4 v
was at 11 years of age, and her height was at 5 feet
5 q D3 Y8 k2 U/ n5 inches. There was no other family history of pre-
8 A: n, s. q7 g X8 ?cocious sexual development in the first-degree rela-
$ h9 C0 L$ J4 r; W mtives. There were no siblings.; N3 p0 H8 ^% J
Physical Examination
. P' a0 R' `* K7 d4 R! ZThe physical examination revealed a very active,
4 v2 V" Q3 c7 k Tplayful, and healthy boy. The vital signs documented) t" Y; n' H3 ^1 ?: Y. v/ ]0 g
a blood pressure of 85/50 mm Hg, his length was
& N6 }2 N# m! [: _6 I90 cm (>97th percentile), and his weight was 14.4 kg
1 Q& m2 K( M5 j6 I. W5 ]" n) G* |(also >97th percentile). The observed yearly growth
/ D. K/ r" f. ?/ Evelocity was 30 cm (12 inches). The examination of: V# X5 h4 ?5 a5 k1 ~3 z6 m
the neck revealed no thyroid enlargement.6 S/ N. T2 q: f
The genitourinary examination was remarkable for8 u0 ~0 a0 l! R' Z* J- Z4 A
enlargement of the penis, with a stretched length of
. H. ~) t" c- t# [/ U, m' C$ G5 e2 K8 cm and a width of 2 cm. The glans penis was very well
* V& ?" k% q2 Z S% A3 [developed. The pubic hair was Tanner II, mostly around2 ] q; {/ z6 k" t
540
7 d2 P6 s. b2 Jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ Y) m; J+ ?+ S* B2 Z h" ?
the base of the phallus and was dark and curled. The1 U, D& u2 Z7 W# O7 w4 U
testicular volume was prepubertal at 2 mL each." ~ o9 t8 i# h) e8 }& e- a
The skin was moist and smooth and somewhat0 F+ [1 I8 Q# X+ c8 ?% C' n% I
oily. No axillary hair was noted. There were no
2 d4 ^& z& Z" m& x( d( u, wabnormal skin pigmentations or café-au-lait spots.
" p: q: [' }, P3 M; O7 NNeurologic evaluation showed deep tendon reflex 2+
( N" s* v4 \; N! B$ b) ^bilateral and symmetrical. There was no suggestion
8 Y4 a2 `$ @3 Y% Qof papilledema., `1 ]2 v% w8 D: h7 l: r5 @
Laboratory Evaluation: s3 e# ?' D8 t" N
The bone age was consistent with 28 months by: h, [" K0 N3 o8 z# Q
using the standard of Greulich and Pyle at a chrono-0 g& L1 q" o8 x! W5 G3 n
logic age of 16 months (advanced).5 Chromosomal
& ^. ~" i. v6 n. U$ t# ?' lkaryotype was 46XY. The thyroid function test
: I3 |; I+ X- w( {3 r$ @showed a free T4 of 1.69 ng/dL, and thyroid stimu-
# _5 n, e, S) B& }0 U7 d% c U5 r3 I, Llating hormone level was 1.3 µIU/mL (both normal).
) r& G2 q9 \- R8 j" k6 jThe concentrations of serum electrolytes, blood$ I1 a8 g A- R1 R! k) I+ P
urea nitrogen, creatinine, and calcium all were" @% N5 b. f) M* z
within normal range for his age. The concentration
5 W: Q7 Q' T) |/ [7 x8 y: Uof serum 17-hydroxyprogesterone was 16 ng/dL: E) j' \. |5 u
(normal, 3 to 90 ng/dL), androstenedione was 20
8 F+ L! e1 Z2 c* J3 [5 b# x c% e& ang/dL (normal, 18 to 80 ng/dL), dehydroepiandros-6 K& l) ?& N4 x, ]6 Q. \
terone was 38 ng/dL (normal, 50 to 760 ng/dL),! ]5 v% [3 I* W
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
9 w. m8 _' n: l1 K- }7 Q# }49ng/dL), 11-desoxycortisol (specific compound S)- n5 J S. g, P; X
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
' x5 ?+ O5 X/ i7 v# R; htisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
( a. k7 W' N9 J- u# l, |: f2 Y7 ctestosterone was 60 ng/dL (normal <3 to 10 ng/dL), v, F" p5 t" ~6 k
and β-human chorionic gonadotropin was less than% g) y' k8 ^5 F8 F# z T% N* H% B
5 mIU/mL (normal <5 mIU/mL). Serum follicular8 t% A1 J" }- {! J
stimulating hormone and leuteinizing hormone
) L8 R& L) L# V% Oconcentrations were less than 0.05 mIU/mL
; D/ J# R( V; S' _(prepubertal). _% F/ P# U' F- t8 P
The parents were notified about the laboratory" Q- X' }' U/ ^" c" e+ U9 C
results and were informed that all of the tests were; ]! I+ u2 ^+ n# k
normal except the testosterone level was high. The
/ c% E4 {% T8 O0 v8 u; Rfollow-up visit was arranged within a few weeks to- W4 N3 `- T; ^9 _# [7 }1 B& @
obtain testicular and abdominal sonograms; how-$ p, X0 B3 q, G" P: V: o( A' a
ever, the family did not return for 4 months.
7 _/ t# x* d, _4 S" N' LPhysical examination at this time revealed that the
3 {: l& K8 W# q; k5 v' x, [child had grown 2.5 cm in 4 months and had gained0 T0 c" v( C3 n, F7 M
2 kg of weight. Physical examination remained
; ?( q( v3 x K. t2 i: B7 }: Bunchanged. Surprisingly, the pubic hair almost com-
; [( K2 _8 Y0 }pletely disappeared except for a few vellous hairs at! O, m5 B6 e( o; f; f
the base of the phallus. Testicular volume was still 2
' y( W9 }+ K. o* ?7 g( rmL, and the size of the penis remained unchanged./ w; O3 _0 F4 o' `- L2 U* M
The mother also said that the boy was no longer hav-
# | Z% c$ p# Y, wing frequent erections.
$ }7 C: [( q* X# j5 s% k! p( }( uBoth parents were again questioned about use of/ r N& h" z1 A2 c$ d3 R0 |
any ointment/creams that they may have applied to3 w! ]$ e2 k: e; x
the child’s skin. This time the father admitted the
6 n7 c# R+ C2 E, \Topical Testosterone Exposure / Bhowmick et al 541
6 Y; O, T# Z/ xuse of testosterone gel twice daily that he was apply-
# y C: o1 i) m7 T. p: Z1 bing over his own shoulders, chest, and back area for
# S9 l9 @1 X! D" u7 da year. The father also revealed he was embarrassed' n3 y" Y5 C2 j: y
to disclose that he was using a testosterone gel pre-
/ w1 X8 Z8 | G. fscribed by his family physician for decreased libido
) C4 u7 g4 p" c, Ksecondary to depression.- P2 z6 ^4 D: F
The child slept in the same bed with parents.
* e0 |- T4 p( H- V8 f% }The father would hug the baby and hold him on his- i- r( O% U8 G# d2 l5 N
chest for a considerable period of time, causing sig-6 j2 a' ?7 O* O; ~ R3 J* A
nificant bare skin contact between baby and father.
& N( F( a4 w# i& D$ }% O1 `7 P. }The father also admitted that after the phone call,0 d! Q3 [6 b( A' L6 g
when he learned the testosterone level in the baby
: B) e3 v0 P5 ]was high, he then read the product information
, C$ I0 v+ ^, _3 Z" G; Zpacket and concluded that it was most likely the rea-: y& J7 X0 r0 ?: P9 _- k9 A
son for the child’s virilization. At that time, they
& I% V/ T/ D* l \6 R1 z. M- }decided to put the baby in a separate bed, and the9 |; e5 @+ u4 I4 h9 t
father was not hugging him with bare skin and had
! S* t/ S1 g6 N/ `5 t" l; ^+ cbeen using protective clothing. A repeat testosterone
) E7 V1 }. O0 M" G. [test was ordered, but the family did not go to the
- f3 E1 l- b% e4 Z2 M2 Xlaboratory to obtain the test.
' w! T. O5 }( [, |0 u3 XDiscussion* m u& r4 v% k8 {0 U+ D
Precocious puberty in boys is defined as secondary
+ r; |. W. T3 F7 zsexual development before 9 years of age.1,4' T; ^8 \4 ], \ f# g
Precocious puberty is termed as central (true) when
, q Q5 w7 L9 u4 y, A" zit is caused by the premature activation of hypo-7 |6 X4 m# N3 C5 Z) U
thalamic pituitary gonadal axis. CPP is more com-0 h1 i9 l9 V0 g
mon in girls than in boys.1,3 Most boys with CPP
; p7 `+ }8 k8 V# ^" lmay have a central nervous system lesion that is+ ]% C8 m0 M! N' V5 D
responsible for the early activation of the hypothal-
* u8 e, N" Q, X0 z6 Z0 i6 h$ damic pituitary gonadal axis.1-3 Thus, greater empha-$ O/ n2 H0 b/ k* T8 `2 A7 A
sis has been given to neuroradiologic imaging in- @: u8 Y: q& ?. {! X5 q; i' ?
boys with precocious puberty. In addition to viril-
, Q+ x) U7 W" X6 Yization, the clinical hallmark of CPP is the symmet-* O6 K: u0 }$ r
rical testicular growth secondary to stimulation by' f; z$ |+ W n# j; m0 F
gonadotropins.1,3
# I/ @/ X" D: Y- T8 BGonadotropin-independent peripheral preco-
( _ m1 v. v& a/ t, j. Qcious puberty in boys also results from inappropriate
' J6 G4 a0 Z5 j$ S$ Z& }androgenic stimulation from either endogenous or% c/ }( u3 N8 J$ h4 n
exogenous sources, nonpituitary gonadotropin stim-
8 ^) ?5 [8 c" W" N' {) i/ \7 Rulation, and rare activating mutations.3 Virilizing
( _$ Y9 A5 u/ ~/ I6 P; scongenital adrenal hyperplasia producing excessive- a( B0 ?) f4 ?3 l+ a
adrenal androgens is a common cause of precocious1 B$ \, D4 b# f
puberty in boys.3,4) {3 f2 a# D" y5 e- W3 H. N, O2 a% H
The most common form of congenital adrenal
& e; X% d0 u+ z7 Jhyperplasia is the 21-hydroxylase enzyme deficiency.$ D) T" q, J W9 Y+ b* T
The 11-β hydroxylase deficiency may also result in: ^5 }. E% S% l2 F4 x
excessive adrenal androgen production, and rarely,3 L+ }9 N0 y: K! B
an adrenal tumor may also cause adrenal androgen
, G2 h, K9 m! h0 G: H; F7 _excess.1,34 f/ X7 R7 Z% x2 P2 w2 H( v
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) L" b0 h+ K' X7 D0 J. j# ~
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
0 E' d8 u. ^9 K/ M( h0 tA unique entity of male-limited gonadotropin-: V! _4 \9 O" g3 ^: _& a7 a6 N
independent precocious puberty, which is also known9 N L$ `: u. I3 F* V& D
as testotoxicosis, may cause precocious puberty at a, U5 g6 a; C' `' w: e4 _
very young age. The physical findings in these boys1 I! r* ~% J$ C) A8 M& l
with this disorder are full pubertal development,
# u- P# e; F) D) Q* e7 iincluding bilateral testicular growth, similar to boys& r u- d; N) a0 A& {; U
with CPP. The gonadotropin levels in this disorder. j- q+ l. D* ]: z
are suppressed to prepubertal levels and do not show3 O' }, X \( n+ K, Z
pubertal response of gonadotropin after gonadotropin-
8 P! f3 g% R! K0 Q% D3 u' t7 h: dreleasing hormone stimulation. This is a sex-linked! j, n! V4 |2 {; `
autosomal dominant disorder that affects only
7 l- L) ?' N& d) I a* Wmales; therefore, other male members of the family
" U' U9 ?. F: E9 `8 amay have similar precocious puberty.3
9 I; N2 q0 t- d% S1 ~; n9 LIn our patient, physical examination was incon-
) r8 d o% N. f0 X% \$ n" u; d6 O, ksistent with true precocious puberty since his testi-) H6 K* q [! N* |2 W2 m( R
cles were prepubertal in size. However, testotoxicosis
' M) w; F& k! D. bwas in the differential diagnosis because his father
& {: R' [6 \' lstarted puberty somewhat early, and occasionally,2 E$ @' s* K2 c3 Y, b
testicular enlargement is not that evident in the
2 k8 f4 u7 J; M: U" @9 m7 nbeginning of this process.1 In the absence of a neg-
# S- M2 ~, ^5 ]/ [. o: U7 y, o0 Oative initial history of androgen exposure, our
H# L+ F5 j4 b7 \5 a9 C8 Nbiggest concern was virilizing adrenal hyperplasia,
6 g- v2 O, z" N$ E- Ueither 21-hydroxylase deficiency or 11-β hydroxylase! M/ t( k* \7 w3 }% O6 u) r) H3 e
deficiency. Those diagnoses were excluded by find-
! d4 N5 x- I+ n" Ming the normal level of adrenal steroids.
" K8 x: T* }" i: g& tThe diagnosis of exogenous androgens was strongly
- I) h9 R D) Q1 h8 n. Jsuspected in a follow-up visit after 4 months because
, m2 V1 j Y+ j: _4 gthe physical examination revealed the complete disap-8 F7 j( I' |& p# z2 q6 T& W
pearance of pubic hair, normal growth velocity, and; O! T$ B6 r) x G5 l! q) h
decreased erections. The father admitted using a testos-" G% o2 z2 w, u1 K8 T
terone gel, which he concealed at first visit. He was
( Y& v4 D- \' L( K2 z; p8 S* ?. `using it rather frequently, twice a day. The Physicians’
3 y1 v: X) F- \8 cDesk Reference, or package insert of this product, gel or
) k4 {8 [) Q. a$ J* A2 G; ocream, cautions about dermal testosterone transfer to, ?0 D3 c& x8 g" B2 u/ g
unprotected females through direct skin exposure.
$ }6 ~6 K: N2 e+ S& b6 {7 DSerum testosterone level was found to be 2 times the
1 C2 i# s4 _( c# \baseline value in those females who were exposed to1 m7 Z, W2 P5 P6 A
even 15 minutes of direct skin contact with their male
0 y6 G% P0 _6 f, L' c# w0 d& u! O3 opartners.6 However, when a shirt covered the applica-3 o0 ~' T0 J' t7 J4 ]
tion site, this testosterone transfer was prevented., y: Q# O) l3 u4 ^$ R
Our patient’s testosterone level was 60 ng/mL,
, @: `: S# {* twhich was clearly high. Some studies suggest that
- S( F! r7 g+ idermal conversion of testosterone to dihydrotestos-- m7 L/ ^3 w9 r% j/ ?
terone, which is a more potent metabolite, is more
C, l" A0 C& T( Aactive in young children exposed to testosterone
' e* @6 q- B! a1 l5 M- c) oexogenously7; however, we did not measure a dihy-
i! m- b# F9 U% F& ?3 Jdrotestosterone level in our patient. In addition to
6 r: r+ n3 `, Hvirilization, exposure to exogenous testosterone in
. L8 _6 \! w, ^8 Jchildren results in an increase in growth velocity and$ m. l# R3 }6 m; j" ~
advanced bone age, as seen in our patient. P9 j1 R7 B9 }+ s6 Z* H8 ~- E
The long-term effect of androgen exposure during. D; G2 T" a2 C/ |0 j
early childhood on pubertal development and final
1 b. W. P, C1 g& S0 O1 x x: G) padult height are not fully known and always remain4 h4 ]. [ ~" A k7 l+ G
a concern. Children treated with short-term testos-
- k+ p9 P3 {; l3 t9 }) tterone injection or topical androgen may exhibit some
9 J& r; x- \5 E. Cacceleration of the skeletal maturation; however, after
) A& c2 u) H! Q+ y; o+ m) J' \cessation of treatment, the rate of bone maturation5 f. D* r8 S U- O! }7 S: N' y4 M# V
decelerates and gradually returns to normal.8,93 G9 x; n6 ]0 {9 V6 q
There are conflicting reports and controversy: Z* D4 B' K2 h( Y4 d
over the effect of early androgen exposure on adult q* m' x+ {5 @: q7 C& l3 Z
penile length.10,11 Some reports suggest subnormal8 X- i2 E4 ~. w: |: m7 p
adult penile length, apparently because of downreg-/ ~3 o; u- [, |( K5 f1 U
ulation of androgen receptor number.10,12 However,- R% ]+ d9 b9 @! i$ q
Sutherland et al13 did not find a correlation between7 R$ w* A3 n+ O1 l
childhood testosterone exposure and reduced adult
$ v' Q0 o$ q1 T3 b2 _' B1 kpenile length in clinical studies.
1 `2 T ?! F& W7 MNonetheless, we do not believe our patient is
3 h! {) l& H! z& _7 Xgoing to experience any of the untoward effects from+ M! F" w& E+ d; {3 I% w
testosterone exposure as mentioned earlier because/ b* i3 \' g2 ~% c
the exposure was not for a prolonged period of time." y0 |4 Q4 h3 f) U1 E( H
Although the bone age was advanced at the time of% {9 v7 C4 e" l2 t1 L* R ]
diagnosis, the child had a normal growth velocity at
2 c: ?$ t; W5 t& b9 a7 A( X. r) c3 Ethe follow-up visit. It is hoped that his final adult
' T) N% M+ i5 ]0 wheight will not be affected.+ ]: B0 Z: I, p. M
Although rarely reported, the widespread avail-
; N2 y4 b5 g cability of androgen products in our society may+ v# E V- B0 W8 w& r3 @
indeed cause more virilization in male or female; c$ x% q5 \5 P2 U2 V, ]2 G
children than one would realize. Exposure to andro-
% n" o9 A# \& K6 |gen products must be considered and specific ques-
5 v: u3 U! n; a4 z" `! Y- s0 j) Vtioning about the use of a testosterone product or: c! q. S: U8 Y( \: S9 W* H7 h
gel should be asked of the family members during
, k1 h9 n4 W5 ?3 J' A1 Xthe evaluation of any children who present with vir-) T) x# ?, f( G9 u- f5 d7 W/ N
ilization or peripheral precocious puberty. The diag-
1 J/ e& [. l, v; X) U1 bnosis can be established by just a few tests and by
- `/ F: _* h+ B% M0 v2 {appropriate history. The inability to obtain such a* g d0 ~% w+ H/ i9 w
history, or failure to ask the specific questions, may. O: z: _0 K6 Z! C
result in extensive, unnecessary, and expensive1 q6 z1 o& }- n8 X$ N: K& T9 M
investigation. The primary care physician should be, L+ I" f5 m3 P2 C5 S, _; r3 h9 E
aware of this fact, because most of these children
, y+ [1 C3 r1 t* z0 h1 |may initially present in their practice. The Physicians’
* s! q- ?; @+ }* \Desk Reference and package insert should also put a
6 K& @5 [( X2 z: Jwarning about the virilizing effect on a male or
# l# D9 }: O; c# v. Dfemale child who might come in contact with some-& x: w+ u: u+ U0 ~9 M5 b( l9 ^
one using any of these products.
6 U, d, C1 A( ]' z- }References
; w0 Y1 j) a, U7 D- V4 ~1. Styne DM. The testes: disorder of sexual differentiation: q9 z- B0 |5 K
and puberty in the male. In: Sperling MA, ed. Pediatric
5 d/ C% f) [6 Y4 x$ n0 kEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;6 b1 G f# E% u0 n9 A i
2002: 565-628.& C. Z% I2 c( W+ c" d1 u* L
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious% i4 o$ |1 ^0 X) n! k1 L3 a7 e9 V
puberty in children with tumours of the suprasellar pineal |
|