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Sexual Precocity in a 16-Month-Old
5 v4 r! p1 U% l& o# ]Boy Induced by Indirect Topical9 P+ S' L. {$ u/ E+ z
Exposure to Testosterone' m; p0 J5 p& K4 u% J3 {# T$ J, V
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
) z' w2 P6 P# ~6 s2 n# band Kenneth R. Rettig, MD19 \+ j0 Z1 P4 b) l) a9 v
Clinical Pediatrics
+ B+ z# d: T. F7 e; eVolume 46 Number 63 C. a" \- |& \% \2 G
July 2007 540-543
! P5 W3 E" ?- Q© 2007 Sage Publications
6 ]# R0 O6 C1 Q. y0 ~10.1177/0009922806296651. e& E5 z1 E+ t! ^
http://clp.sagepub.com9 P) Q U7 t& P5 l
hosted at# J; B: S* n" P9 P& G* d
http://online.sagepub.com
$ I1 ]! ]4 h4 BPrecocious puberty in boys, central or peripheral,
- d% N3 G2 P: P* k" i( His a significant concern for physicians. Central( U' F [& i0 W! x& f3 S
precocious puberty (CPP), which is mediated
. G+ K# C) o3 c2 ]through the hypothalamic pituitary gonadal axis, has
4 E8 j6 X7 k- ^1 l0 H, _: W$ oa higher incidence of organic central nervous system
: `) }" P' s2 S* k3 j. O, D- \lesions in boys.1,2 Virilization in boys, as manifested3 ?4 a! A) O; ?4 L
by enlargement of the penis, development of pubic; ?/ F9 W; m/ r
hair, and facial acne without enlargement of testi-
, X: C* I0 Q9 n1 Hcles, suggests peripheral or pseudopuberty.1-3 We
2 u1 M7 [; r# Z- |* wreport a 16-month-old boy who presented with the
& b0 V5 }+ _9 a" _1 s) Xenlargement of the phallus and pubic hair develop-9 J, L, k* L3 G5 I* I3 m- J0 D* u+ s
ment without testicular enlargement, which was due( L# ?/ m+ g1 D
to the unintentional exposure to androgen gel used by
5 }% M+ j! ~6 ? Z/ o! [% @the father. The family initially concealed this infor-
+ h! e4 M% b2 }% z, J' a1 amation, resulting in an extensive work-up for this& G+ Y' ~5 L& P7 A
child. Given the widespread and easy availability of
- I& u- H8 [' g! `testosterone gel and cream, we believe this is proba-
{% D' Q* H, L: p8 Lbly more common than the rare case report in the% C* u3 B! B% ~$ \
literature.4
) A7 ?* o& a7 G! VPatient Report) M& Q) e( b& h4 |8 V2 R
A 16-month-old white child was referred to the
# L7 B' L$ U# G) Gendocrine clinic by his pediatrician with the concern
2 k$ G& X! r: `5 rof early sexual development. His mother noticed. p; ]$ g, n/ J) N, f5 ^8 ~( U
light colored pubic hair development when he was
1 @+ ?+ U5 W8 {From the 1Division of Pediatric Endocrinology, 2University of* ^3 B) G2 c3 x0 z+ R/ ^
South Alabama Medical Center, Mobile, Alabama.
p) o4 d% G1 j- f5 n; R/ {* jAddress correspondence to: Samar K. Bhowmick, MD, FACE,1 [- X- M9 z1 s
Professor of Pediatrics, University of South Alabama, College of% g: n" T8 D+ t1 X: e" K
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297; g$ K0 l9 W u8 J* O3 F/ {& W
e-mail: [email protected].
% H( ~( ]7 x# d" |' x3 S7 S- W/ Habout 6 to 7 months old, which progressively became, p/ w( K, x: F8 X8 j3 |4 U7 D$ d1 x
darker. She was also concerned about the enlarge-5 H. ^" E7 T' k+ |& }) A, y
ment of his penis and frequent erections. The child! A* h* `4 T# h+ |8 F J- s
was the product of a full-term normal delivery, with9 t7 ^$ {8 }& o+ Q
a birth weight of 7 lb 14 oz, and birth length of' F" ^! d. x9 z
20 inches. He was breast-fed throughout the first year
- V% k# |5 E/ ^7 K& R% aof life and was still receiving breast milk along with
: g% f' {4 N. y, w6 H" p! Dsolid food. He had no hospitalizations or surgery,
. n4 t5 o3 }3 q$ i8 L/ d+ Band his psychosocial and psychomotor development
7 Y; M$ t3 L, v6 A/ @5 lwas age appropriate.
( p' O: S+ b8 `5 _6 E! BThe family history was remarkable for the father,
/ V0 A. M' f, p! F8 j3 y1 Uwho was diagnosed with hypothyroidism at age 16,
?" F1 S, \% T2 X) _which was treated with thyroxine. The father’s
, d/ r0 Z" V) U& \- t$ ]height was 6 feet, and he went through a somewhat
% O h3 E' V. f) i' }early puberty and had stopped growing by age 14.
( z8 C# u8 M& h/ j, mThe father denied taking any other medication. The
) y+ K. s5 a, [6 r, F: ?child’s mother was in good health. Her menarche
- y) A; I2 z5 Y# k$ v; b+ N' Uwas at 11 years of age, and her height was at 5 feet
* G' t) }. ], L2 O4 ^7 E1 z6 [5 inches. There was no other family history of pre-1 N/ g' r0 V" ^. Q
cocious sexual development in the first-degree rela-1 z% y7 E/ Y6 f5 z9 D) X
tives. There were no siblings.
6 _7 b* L* z( C9 h) T% MPhysical Examination, X2 V# |- X9 f9 h, C( |9 s7 g
The physical examination revealed a very active,
3 K# j' ^7 e$ l" f/ b& _" j, Zplayful, and healthy boy. The vital signs documented
4 p3 A) d1 u) m" {- V# ea blood pressure of 85/50 mm Hg, his length was3 x! W* q" Q$ @- Y
90 cm (>97th percentile), and his weight was 14.4 kg' P. N: q: a, O9 Q- j0 C& `5 k
(also >97th percentile). The observed yearly growth
% B; a ^" M% J+ C0 h+ H, H: ] yvelocity was 30 cm (12 inches). The examination of
- w* }4 ` l& T* sthe neck revealed no thyroid enlargement.
' L5 i% T9 p. W- [/ ~- i/ SThe genitourinary examination was remarkable for& y3 \- S8 t9 v: H) t/ }
enlargement of the penis, with a stretched length of) i; _: m2 u1 N. j" U7 Z( x
8 cm and a width of 2 cm. The glans penis was very well
7 q! @6 w l: _+ L# x/ Odeveloped. The pubic hair was Tanner II, mostly around
4 f# c$ Z+ j/ X* t) }/ i' u540
: S5 @" j6 @% N+ ?4 F* Rat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 { u* C9 ^: h% l& i# i9 t
the base of the phallus and was dark and curled. The
3 R6 ]7 v A6 K( j/ k! L8 i, z$ htesticular volume was prepubertal at 2 mL each.
6 v2 |1 w3 @. R' BThe skin was moist and smooth and somewhat, ]9 M$ Y# c8 V4 E' p. o
oily. No axillary hair was noted. There were no C# L$ A: p( j% r( O v5 M6 ~
abnormal skin pigmentations or café-au-lait spots.* p2 p5 F& }7 Y. [
Neurologic evaluation showed deep tendon reflex 2+" m& H+ A$ C- J. R' i
bilateral and symmetrical. There was no suggestion
3 c! r/ b/ H: c" T0 uof papilledema./ q2 K2 j4 X& U5 R
Laboratory Evaluation
$ ~( P* c! i- t6 H- L. e& iThe bone age was consistent with 28 months by
' `. a4 E$ h, z. l, V; @ y6 Lusing the standard of Greulich and Pyle at a chrono-
' B" s8 [( l) z7 |7 ?logic age of 16 months (advanced).5 Chromosomal' b/ b, @5 I+ M3 l
karyotype was 46XY. The thyroid function test
1 h$ S v( L* U3 ushowed a free T4 of 1.69 ng/dL, and thyroid stimu-
5 U" y& @& I+ K" s( T& klating hormone level was 1.3 µIU/mL (both normal).
( k/ |3 Y& y2 n1 I' d4 u/ E6 WThe concentrations of serum electrolytes, blood8 B7 p4 y2 }3 \9 M
urea nitrogen, creatinine, and calcium all were
& ~: h' Y3 q. }6 n: rwithin normal range for his age. The concentration
# \& y# v1 y6 q9 Tof serum 17-hydroxyprogesterone was 16 ng/dL
; j, v# D: W# o) L2 I(normal, 3 to 90 ng/dL), androstenedione was 20 T& D- K7 y. S( B0 F& ~
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-" X8 x- V! D# J0 {" j6 e
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
% ]/ R$ T, g+ R4 xdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
+ _$ w B. `4 c! S, V( L49ng/dL), 11-desoxycortisol (specific compound S)7 A. |3 Y$ ` I# S" o
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-1 B! p# l% z( t% F
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total$ y8 \0 |% g3 C, `; W
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),5 w6 `; R% |, c+ y3 L
and β-human chorionic gonadotropin was less than
; R6 d/ Y5 ^- H: a1 m9 K5 mIU/mL (normal <5 mIU/mL). Serum follicular
5 ^6 ~# B1 T: [) r0 zstimulating hormone and leuteinizing hormone
" [" v# q# @% X. r2 Iconcentrations were less than 0.05 mIU/mL6 \" h1 F1 q3 w+ B
(prepubertal).7 R T7 |9 U+ _ i" a* ]6 S
The parents were notified about the laboratory1 M# Q3 G2 _$ h
results and were informed that all of the tests were8 F, B l! G2 F7 q, [+ [; t, j% H
normal except the testosterone level was high. The* ^' }" j, ^. b8 F
follow-up visit was arranged within a few weeks to
2 A5 ~4 T4 \# o, L1 Zobtain testicular and abdominal sonograms; how-
. x4 Z9 M* k0 ~+ wever, the family did not return for 4 months.
* \$ H4 s$ W) L q! M, S$ B# h# RPhysical examination at this time revealed that the
. c% M. L" ~# H( }# N4 f% Ochild had grown 2.5 cm in 4 months and had gained: e: Y. [: P d1 q2 K* F5 p& A
2 kg of weight. Physical examination remained
4 x$ Y' [! |% K2 ]' L0 ?2 o; Munchanged. Surprisingly, the pubic hair almost com-
3 K0 \/ `6 V0 [8 bpletely disappeared except for a few vellous hairs at
" r$ r: C0 B B$ l6 G: othe base of the phallus. Testicular volume was still 20 Y4 |( @$ X/ ?, C2 l' u5 Y: a
mL, and the size of the penis remained unchanged.1 ?' u0 o6 |! b' K8 z8 f
The mother also said that the boy was no longer hav-; @8 O- }" t5 d
ing frequent erections.# \9 Y0 v( B7 @
Both parents were again questioned about use of
6 B; U8 f- G ^3 l" eany ointment/creams that they may have applied to
6 S' h, z! n: t z; G3 ^the child’s skin. This time the father admitted the
' I% s3 |: C: o4 T+ PTopical Testosterone Exposure / Bhowmick et al 541$ z. C6 j- S: W L9 R
use of testosterone gel twice daily that he was apply-
. f6 l# ] n" |* ]9 w+ |4 S5 oing over his own shoulders, chest, and back area for
! }# @7 Q( ^6 {! Z B& na year. The father also revealed he was embarrassed( d# I r( p$ V/ T- Y& D: j
to disclose that he was using a testosterone gel pre-
% }3 Q3 Y. W# v- ]scribed by his family physician for decreased libido* e+ ~; j6 G+ S$ o S( y& X/ F3 ?
secondary to depression.
* i- h. r0 y+ } J$ PThe child slept in the same bed with parents.& R9 z5 t# z% @; f
The father would hug the baby and hold him on his
3 s- O( l% E# ^. V# Bchest for a considerable period of time, causing sig-
4 I; B9 t' w6 D+ G1 ]nificant bare skin contact between baby and father.
/ Z! V; B2 I1 C. G$ U' t' E8 WThe father also admitted that after the phone call,% x+ e9 Y, \ D* s: x, y2 _
when he learned the testosterone level in the baby
# S2 J5 [- D C% h9 D/ R& [+ p- r, Ywas high, he then read the product information: W' K4 v3 g6 Z% v$ y2 N
packet and concluded that it was most likely the rea-
/ W; E( _4 A( Y) vson for the child’s virilization. At that time, they0 ? e0 B; R/ c2 o- ]
decided to put the baby in a separate bed, and the
; F% I8 J3 E$ y. Zfather was not hugging him with bare skin and had
8 ?' }4 u% a& { e& b4 qbeen using protective clothing. A repeat testosterone
* P* u6 I8 R' ~) p+ n. Mtest was ordered, but the family did not go to the/ C4 R8 [4 L' V
laboratory to obtain the test.2 Q1 U) U7 m' T M# u% A) C7 I
Discussion2 j( H1 x/ C) A
Precocious puberty in boys is defined as secondary% Q6 j: j% s$ g1 L: w6 G( ]% A
sexual development before 9 years of age.1,4
+ A4 J5 r, r& k. HPrecocious puberty is termed as central (true) when- P' o; t" ^, L8 @% [3 R: |& f t2 e5 h
it is caused by the premature activation of hypo-
; [% Q' x% X5 s' ithalamic pituitary gonadal axis. CPP is more com-4 y) m* I7 d) @2 D, B8 r
mon in girls than in boys.1,3 Most boys with CPP# V8 ^% i7 Z# ?+ r4 I% ?' }
may have a central nervous system lesion that is
( ^ L3 b' T+ x9 c! `% ~$ M" U9 Cresponsible for the early activation of the hypothal-/ p) @ v. v+ ~
amic pituitary gonadal axis.1-3 Thus, greater empha-7 K* d2 L! U* q5 L* v& j+ V4 Z3 E% f/ K
sis has been given to neuroradiologic imaging in
. r% n/ ^: {! B4 u( B5 [boys with precocious puberty. In addition to viril-$ b$ j! Z0 Z# ^* \1 ?) a
ization, the clinical hallmark of CPP is the symmet-
. s$ |& a% l4 ^. B0 Xrical testicular growth secondary to stimulation by9 i. d1 Y3 ^; b. S! f- L
gonadotropins.1,3
! U0 l( U8 e3 d1 b7 DGonadotropin-independent peripheral preco-
0 @% u/ e" ^! O# }; Y! Fcious puberty in boys also results from inappropriate6 X5 R! O: ?& z, _# E
androgenic stimulation from either endogenous or6 P2 @, d' m8 @& b, Y; q
exogenous sources, nonpituitary gonadotropin stim-
- N7 |! J! R! ]" b) q5 R$ ?ulation, and rare activating mutations.3 Virilizing
: K- c2 e, n" C# zcongenital adrenal hyperplasia producing excessive
- ^: p# j& U* y( s3 Z2 x+ j9 v+ Y$ Tadrenal androgens is a common cause of precocious! E1 @; P8 N6 H q0 ?! y6 S- z
puberty in boys.3,40 \ U# p$ _1 V9 }/ c `
The most common form of congenital adrenal
) f' ~) H4 n6 ~- a% o0 b% u" hhyperplasia is the 21-hydroxylase enzyme deficiency./ P/ Y* V7 |4 g3 \& m) O5 y6 K
The 11-β hydroxylase deficiency may also result in
E9 `: b: M+ Q" a( }$ t- W* texcessive adrenal androgen production, and rarely,
" W: k5 U/ X w; L" Xan adrenal tumor may also cause adrenal androgen
2 H* E( a+ u. G- R6 F2 Zexcess.1,3
9 h6 a4 d2 r& }: Q- wat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! y( v( f( E( |/ H% `5 V
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
p7 Y4 ?; W9 W* X4 AA unique entity of male-limited gonadotropin-
* T7 V+ S4 I1 G6 N0 |independent precocious puberty, which is also known
3 u. c; g1 R7 h' {; Bas testotoxicosis, may cause precocious puberty at a$ z# b }# q& p0 E1 [( v
very young age. The physical findings in these boys
/ ]" Y1 v2 m4 X; {' c8 K! Lwith this disorder are full pubertal development,
% h$ A( G; k2 U* ^$ }3 [including bilateral testicular growth, similar to boys
4 ?' J! V; g. e8 B1 N) v9 j9 Ywith CPP. The gonadotropin levels in this disorder6 _* T6 l* H" I
are suppressed to prepubertal levels and do not show
" P8 M, G' b: G4 b$ Lpubertal response of gonadotropin after gonadotropin-
. E; Z1 K9 T# o: _, k" q6 r+ F8 Greleasing hormone stimulation. This is a sex-linked
/ M0 t* P: J$ I# Q" v2 e& Tautosomal dominant disorder that affects only$ j4 u$ Z5 K: S3 u2 p
males; therefore, other male members of the family
6 ~% K0 C. o( P" i! O' A& I3 m: Pmay have similar precocious puberty.3) w& K) P8 ^8 Q" O1 F
In our patient, physical examination was incon-
q5 T5 D4 c/ g: |sistent with true precocious puberty since his testi-
L' o; q' U( z3 B4 ]) ?cles were prepubertal in size. However, testotoxicosis
* g: T& o! l4 k" P" C; H) ~6 fwas in the differential diagnosis because his father% J3 T) A/ S! D, J: W; H: f
started puberty somewhat early, and occasionally,
: r$ U: f% P! htesticular enlargement is not that evident in the
0 O* w2 @, i7 }; ]beginning of this process.1 In the absence of a neg-% p6 h, A% B( ^2 ^% T- l
ative initial history of androgen exposure, our- A/ w6 ^5 h9 U( q! _+ C0 v
biggest concern was virilizing adrenal hyperplasia,
* L- t1 c/ `3 E; s+ e. g1 f, A3 c1 ieither 21-hydroxylase deficiency or 11-β hydroxylase: ?' [! z, {0 y# x( @( l# d+ G
deficiency. Those diagnoses were excluded by find-7 T5 d5 _$ D o- y* A6 ~/ I# {
ing the normal level of adrenal steroids.
; A' i. }4 Y8 U$ V( bThe diagnosis of exogenous androgens was strongly
- e. Z2 Z- P' v3 `, r" nsuspected in a follow-up visit after 4 months because
/ _% d1 a" s% Q# \) c; I& Dthe physical examination revealed the complete disap-
5 I. ?: b* {) w. u$ s' bpearance of pubic hair, normal growth velocity, and
" X+ q/ e4 }$ T! w9 l8 |decreased erections. The father admitted using a testos-" c# _/ z m$ J H( o7 a4 p+ l, N
terone gel, which he concealed at first visit. He was
- m9 k( b% c Vusing it rather frequently, twice a day. The Physicians’: {! X' n8 s) G3 x F- g/ m
Desk Reference, or package insert of this product, gel or
0 n0 i, \) u7 R1 p' u2 Icream, cautions about dermal testosterone transfer to
2 V& U/ U5 s4 E6 q4 z- v5 l, [unprotected females through direct skin exposure.1 T: ^. U; g& W% V/ P! B1 {( T
Serum testosterone level was found to be 2 times the
+ ~6 d% t2 o( `& O( o# A* ]baseline value in those females who were exposed to
$ l$ l! p! e0 U5 V! Z8 [even 15 minutes of direct skin contact with their male+ g" X( W+ ?0 s- e+ x
partners.6 However, when a shirt covered the applica-& x% c. y+ H% C
tion site, this testosterone transfer was prevented.% F5 U5 _3 g" l% H; `: c$ }! a
Our patient’s testosterone level was 60 ng/mL,8 {" o. w) r8 a. j
which was clearly high. Some studies suggest that! s, r' v# b) v5 r8 a
dermal conversion of testosterone to dihydrotestos-' @' V8 K: W! M
terone, which is a more potent metabolite, is more
2 M4 O, [. ~( l5 m" R* qactive in young children exposed to testosterone, |) R* _: z5 f
exogenously7; however, we did not measure a dihy-, q$ P7 O* O7 a' T
drotestosterone level in our patient. In addition to+ z& q8 I1 R Q( ^4 A1 @
virilization, exposure to exogenous testosterone in6 |& A7 v8 g1 E- p) h
children results in an increase in growth velocity and
+ E( q. L) b9 j; e. P% m9 {% qadvanced bone age, as seen in our patient.
$ }: R! i' g9 ~ V8 TThe long-term effect of androgen exposure during
: ]" w( n! B: s F: qearly childhood on pubertal development and final% @* z# Z3 u! a. D0 K4 ]) i
adult height are not fully known and always remain
9 w( p9 y! h7 K. X: Q3 Ka concern. Children treated with short-term testos-6 @# _+ `5 v3 \
terone injection or topical androgen may exhibit some5 b) ?- U0 l1 N; g+ V
acceleration of the skeletal maturation; however, after
E/ t- M/ V. E1 A' M2 ^+ ~cessation of treatment, the rate of bone maturation2 U, d& x7 {* h! v! ~
decelerates and gradually returns to normal.8,9
1 F! G/ f! V+ \ j, l6 z& ?There are conflicting reports and controversy
( D( `$ R3 P* {' O7 i7 a6 w7 oover the effect of early androgen exposure on adult( |4 O( h) p, g1 a$ J" c
penile length.10,11 Some reports suggest subnormal: K& l7 o3 }# S5 `
adult penile length, apparently because of downreg-
7 B: v0 r- D* ~ulation of androgen receptor number.10,12 However,
/ k: h+ ?0 \- v* ZSutherland et al13 did not find a correlation between
$ u5 e8 M- @6 O, C$ {childhood testosterone exposure and reduced adult3 `0 c2 R, i, I! D
penile length in clinical studies., G* E8 K1 J2 d1 y/ n1 _3 U
Nonetheless, we do not believe our patient is
# B" I& k$ y/ ?/ v' G/ Egoing to experience any of the untoward effects from5 s6 I5 l* \ p3 z, w- @" r
testosterone exposure as mentioned earlier because3 F' H6 c* c. k6 R1 O
the exposure was not for a prolonged period of time.
; }. ]' x1 o. v7 YAlthough the bone age was advanced at the time of
% G3 U7 J8 A( ~. w& x5 q3 ?diagnosis, the child had a normal growth velocity at$ N6 K$ |- f2 c# }. S
the follow-up visit. It is hoped that his final adult6 J. m; S% `( v* B) N y# V& J
height will not be affected./ F3 { Z, |, H: F' H
Although rarely reported, the widespread avail-6 {* h! O5 d% g: z
ability of androgen products in our society may4 |7 k7 T% T) ~
indeed cause more virilization in male or female
# ?/ Y; n/ J6 }' l. |% cchildren than one would realize. Exposure to andro-% E- u: S7 b3 I k' M5 s$ F
gen products must be considered and specific ques-0 e* [3 g; N8 J) i0 |- b6 m
tioning about the use of a testosterone product or) C4 y" `. v) v- n8 G. ^2 e. s
gel should be asked of the family members during4 u3 V# I* v% f+ @# ^$ Y# R
the evaluation of any children who present with vir-/ F* ]6 f i( D
ilization or peripheral precocious puberty. The diag-
9 ~3 y2 c* ?4 K% ] C( l' L% Knosis can be established by just a few tests and by
, g; L" P) j5 oappropriate history. The inability to obtain such a
1 \. R! r z/ {" d9 ~$ Ghistory, or failure to ask the specific questions, may0 q9 s8 ~/ U4 q, D
result in extensive, unnecessary, and expensive
. v5 t( ]: ?! x$ j; K1 b# @- d8 p minvestigation. The primary care physician should be6 t. c' N: ]' ] a& H
aware of this fact, because most of these children
7 i! g ]- O$ S4 {8 hmay initially present in their practice. The Physicians’! R) _0 q- i) j% i
Desk Reference and package insert should also put a+ o+ ?, G# F) ^; E
warning about the virilizing effect on a male or5 Y/ A* q/ e( P3 ^: F: k
female child who might come in contact with some-) s/ @' i) C: x5 `* O
one using any of these products.' L& n" L3 r# X
References E% Q. T9 u$ D- P: e6 j
1. Styne DM. The testes: disorder of sexual differentiation: J2 [+ \3 P: K
and puberty in the male. In: Sperling MA, ed. Pediatric
( ?" q' f- k; G1 \3 n* kEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
+ q, l* A+ ~& C. I& G2002: 565-628.! Q2 H! k7 v* {: ^% h- c
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
% ?. B5 E" `: O" B$ S/ b' e, B' P8 `puberty in children with tumours of the suprasellar pineal |
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