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Sexual Precocity in a 16-Month-Old8 u) l6 t2 I. v. T* [4 X' V
Boy Induced by Indirect Topical% H2 `4 c+ X& s, u# e
Exposure to Testosterone' x' T: F0 [% ?: x: X0 A# a. g
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
) J4 D+ [' G% W& ?1 A# kand Kenneth R. Rettig, MD1
$ \% K, h9 l) ?4 ~8 R* c1 J$ mClinical Pediatrics
( f, w5 _: ^& t: o- ^1 V: D* @8 \% ZVolume 46 Number 6
5 `- z2 Q4 N# r, B2 NJuly 2007 540-543
, d5 Q- L) q) B8 ?; O/ D. L) y: ]0 f© 2007 Sage Publications) j' ]5 E& J1 [
10.1177/0009922806296651
" d6 c, h6 O+ @: d$ F" Ghttp://clp.sagepub.com
% D% {7 y* F* A3 Hhosted at1 o: d! ?* `( ]8 i
http://online.sagepub.com/ r7 m$ M) a0 Z$ t% V) k
Precocious puberty in boys, central or peripheral,2 g/ Y ]# c4 `$ m1 ]6 p1 U `
is a significant concern for physicians. Central3 D! ]0 }( m. X( b
precocious puberty (CPP), which is mediated
" g$ _, J- N) [# j1 Z4 I h* Hthrough the hypothalamic pituitary gonadal axis, has
# |( h$ A d& }; I' Ra higher incidence of organic central nervous system
' h# E+ z8 M# v4 A4 C1 U/ q4 llesions in boys.1,2 Virilization in boys, as manifested2 B) S9 _# N0 l; j- @# N. W: |4 q
by enlargement of the penis, development of pubic% |: U0 l6 }; A) G
hair, and facial acne without enlargement of testi-) H# E) s, _' @% v0 |+ |8 e
cles, suggests peripheral or pseudopuberty.1-3 We; P# U1 P" \- R0 q9 u7 F
report a 16-month-old boy who presented with the
6 J; P4 f V" Z" Y9 Y7 eenlargement of the phallus and pubic hair develop-9 J# g" R0 J" L4 P* P0 M9 g; b
ment without testicular enlargement, which was due
) {5 r# Y8 b2 u% a6 C& Gto the unintentional exposure to androgen gel used by! G9 Y6 A" f3 d# {( T2 q
the father. The family initially concealed this infor-
* ]; ]" U; Y# \6 H, D: [+ omation, resulting in an extensive work-up for this) q8 @/ |6 n; ?
child. Given the widespread and easy availability of& n/ F; U' X9 G
testosterone gel and cream, we believe this is proba-3 L6 W9 i( s4 `$ z( O& r
bly more common than the rare case report in the
! U& k& e* H& E$ X, B0 ]literature.4
7 i; y- X _' h9 D8 ]Patient Report, P6 P. T! R% j$ h6 a
A 16-month-old white child was referred to the
" t' y2 h9 u8 o. f1 Sendocrine clinic by his pediatrician with the concern
- _( K* m5 Y4 a1 rof early sexual development. His mother noticed! t' P8 u0 G7 i6 O; E5 H8 u
light colored pubic hair development when he was# V: x. p7 a. M+ W( T- m
From the 1Division of Pediatric Endocrinology, 2University of! e1 J' [1 @4 C5 D* L! O! @, v+ R
South Alabama Medical Center, Mobile, Alabama.5 u- y, B* l4 {& O. l: s
Address correspondence to: Samar K. Bhowmick, MD, FACE,+ z$ E* n; h9 k- @" L M
Professor of Pediatrics, University of South Alabama, College of
3 B# s5 ^- h6 g8 H/ |, aMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;6 v9 L% C+ R+ W% x8 L" q, b' o. t
e-mail: [email protected].9 r9 O8 h' U! ?7 Z) A4 p& d( H* l7 Q& H
about 6 to 7 months old, which progressively became
, f1 d4 I9 R3 q( o+ Ydarker. She was also concerned about the enlarge-- Q7 E, D$ o! o. U4 f6 t
ment of his penis and frequent erections. The child1 [4 M. L; K2 ^, \6 f5 M' f" O. }
was the product of a full-term normal delivery, with
" {& k4 n% Y! z) e9 va birth weight of 7 lb 14 oz, and birth length of
+ W. ^4 A0 g/ o% _9 n4 e- A20 inches. He was breast-fed throughout the first year
: D* _& c' H, k( [9 tof life and was still receiving breast milk along with
! x6 F! n: T* lsolid food. He had no hospitalizations or surgery,
2 e" @& J5 G7 Q; D* Z- B3 G8 Pand his psychosocial and psychomotor development
. A$ I: Y2 P# w( C' q1 @1 c" ?was age appropriate.
, ?/ [* @4 g1 P- VThe family history was remarkable for the father,1 {( `" a- g- x
who was diagnosed with hypothyroidism at age 16,
6 V$ }; F4 p: p$ h$ Gwhich was treated with thyroxine. The father’s) |7 B0 N! X, H* u$ O
height was 6 feet, and he went through a somewhat j# V e" X1 p6 S; \5 [ y
early puberty and had stopped growing by age 14.
5 e9 T9 f+ o2 VThe father denied taking any other medication. The
1 V# R, B1 v" z0 `% {child’s mother was in good health. Her menarche
/ D( t& [4 u9 e% l: Dwas at 11 years of age, and her height was at 5 feet
( P2 i0 m; I' `, h, }6 f5 inches. There was no other family history of pre- o2 g! k+ f+ Q
cocious sexual development in the first-degree rela-# ^% i2 y* C" b
tives. There were no siblings., Y/ A# }) W! b$ e: }
Physical Examination
( r+ T% t+ S3 YThe physical examination revealed a very active,( Z7 i9 \9 |+ l( ^& X. @0 v! K+ G
playful, and healthy boy. The vital signs documented
( d$ c, l3 l( j* `2 ba blood pressure of 85/50 mm Hg, his length was/ _- n4 l0 ]0 \! }( i% Z8 d
90 cm (>97th percentile), and his weight was 14.4 kg8 {2 H* @6 S- z6 y
(also >97th percentile). The observed yearly growth0 `7 ~/ K& @- `0 N
velocity was 30 cm (12 inches). The examination of$ S$ b% V5 r/ f$ O' D3 U& y
the neck revealed no thyroid enlargement.
0 o; F* q2 p h$ B! P5 U! A' Q" LThe genitourinary examination was remarkable for+ u1 ?& k, z0 ?
enlargement of the penis, with a stretched length of8 m i9 L: `8 f! B* ]4 F
8 cm and a width of 2 cm. The glans penis was very well
; s: s" }) C% d: c! V- s$ `developed. The pubic hair was Tanner II, mostly around7 n4 G; N$ I2 H6 o; C `9 O. _
540 X0 c ?9 r6 o0 Z. `, }5 S7 P/ {+ e
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 X, e: V( Q% m) Xthe base of the phallus and was dark and curled. The
$ W7 G! W! k& S1 S* G8 o2 I1 ^testicular volume was prepubertal at 2 mL each.
! p7 E( e, r: h" t) v3 o$ OThe skin was moist and smooth and somewhat, I1 ?$ h' I# w4 L# O
oily. No axillary hair was noted. There were no9 f) M. v" j7 Z+ J: Z4 c* _
abnormal skin pigmentations or café-au-lait spots.( T9 ]* r9 d2 n
Neurologic evaluation showed deep tendon reflex 2+
4 Y& n# Z1 V. u5 d1 m# p; c' ?# c' Kbilateral and symmetrical. There was no suggestion7 z; S+ L6 m3 N8 z
of papilledema.$ ~% p% o, e$ }8 @+ S- e: C
Laboratory Evaluation; y8 z( }+ x# U( C, }$ d
The bone age was consistent with 28 months by5 w0 w! |, {, J" S
using the standard of Greulich and Pyle at a chrono-6 u+ v |# {! w- L) ~. T
logic age of 16 months (advanced).5 Chromosomal4 i% Q/ ^+ M' A) J/ p2 O
karyotype was 46XY. The thyroid function test
& j7 m- v1 m2 Cshowed a free T4 of 1.69 ng/dL, and thyroid stimu-$ j8 B. I; a* }& P4 l
lating hormone level was 1.3 µIU/mL (both normal).% ?& `/ n$ k8 O8 Z9 C- v+ R
The concentrations of serum electrolytes, blood
; J% P6 n6 r( X2 I! Murea nitrogen, creatinine, and calcium all were7 R4 W. h) ?! k% Z" X7 N4 `4 s4 L
within normal range for his age. The concentration- q$ R+ _& C1 ]
of serum 17-hydroxyprogesterone was 16 ng/dL2 M5 h3 i; ~' Y" w; K( m6 U/ \
(normal, 3 to 90 ng/dL), androstenedione was 20
8 n+ x' Y. n: v# gng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-- G( N9 F s% E
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
7 E j! n9 l$ }% Odesoxycorticosterone was 4.3 ng/dL (normal, 7 to
! X9 R- I+ ]- h. Z/ \( R+ O* Z7 X49ng/dL), 11-desoxycortisol (specific compound S)0 t& O. g& f, ^! c' v
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
5 Q, I& h) h4 Wtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total+ U2 [- A0 q: D9 {; V/ [) P w, D
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),1 \& u2 O0 Q$ U+ a2 o
and β-human chorionic gonadotropin was less than
0 x0 n" k# L9 U" @6 T5 mIU/mL (normal <5 mIU/mL). Serum follicular b* V* `% q! l4 R
stimulating hormone and leuteinizing hormone( `, H8 f% L1 D/ C
concentrations were less than 0.05 mIU/mL
1 G9 A U0 l8 L(prepubertal).( l4 |$ e( @6 W- V7 s* V
The parents were notified about the laboratory
1 w$ i" P5 }7 H6 w1 Zresults and were informed that all of the tests were9 s8 F1 v, P/ f8 W7 C
normal except the testosterone level was high. The1 q% j! x' l2 X6 S
follow-up visit was arranged within a few weeks to
/ K5 v( t8 [# ?4 lobtain testicular and abdominal sonograms; how-1 E- m$ a* |+ @
ever, the family did not return for 4 months.& F9 C& O% x, d. u. h) [5 o
Physical examination at this time revealed that the
. L% t, V3 e* q+ W; T! Mchild had grown 2.5 cm in 4 months and had gained% |: N+ k3 {$ i! Q6 |3 U e# p
2 kg of weight. Physical examination remained
% |# J$ C0 N7 k5 {unchanged. Surprisingly, the pubic hair almost com-) F+ {4 L. k6 P. v
pletely disappeared except for a few vellous hairs at
& E. N) b+ _ i4 R" f0 @the base of the phallus. Testicular volume was still 2
^; T A+ G$ \mL, and the size of the penis remained unchanged.
0 [" _4 s# o" P1 oThe mother also said that the boy was no longer hav-
+ l3 ^" O! ~, c- I( M* r- Oing frequent erections./ s- R- t1 z8 R# M8 x* n& T
Both parents were again questioned about use of
2 O' P% G' J1 w5 b% Aany ointment/creams that they may have applied to) y' G6 l% ?4 ^( l/ E
the child’s skin. This time the father admitted the! Q8 R. {5 s0 p- o* F
Topical Testosterone Exposure / Bhowmick et al 541
3 O6 |, i" z& i: ouse of testosterone gel twice daily that he was apply-# J, x) K" X p- M
ing over his own shoulders, chest, and back area for/ V& f( m; M6 U# ^* y. S1 {: Z2 ]
a year. The father also revealed he was embarrassed
' h, x6 z3 z& uto disclose that he was using a testosterone gel pre-! E* i, x2 I1 w% C- {
scribed by his family physician for decreased libido
) ?. V' z0 ^6 H3 u6 J* p Hsecondary to depression.
: C! @7 b1 r. A! W6 kThe child slept in the same bed with parents.* p% T) P, y: s7 s
The father would hug the baby and hold him on his
) |1 ^ y$ t5 e3 H% @$ wchest for a considerable period of time, causing sig-
0 p0 P+ |, z7 Ynificant bare skin contact between baby and father.
; D0 O% f7 |( ^$ W" aThe father also admitted that after the phone call,/ ?& ?: ]& U3 D8 u$ k; h
when he learned the testosterone level in the baby
: b: b0 S& k/ w; l: c; ^' u7 dwas high, he then read the product information
- @! f0 M1 Q( A& R6 y4 hpacket and concluded that it was most likely the rea-/ u$ `, f4 v' s& Q; A
son for the child’s virilization. At that time, they
k: x$ m0 W4 d9 W/ w! x- V6 qdecided to put the baby in a separate bed, and the
4 {/ P) q* ~3 A* W& j' Dfather was not hugging him with bare skin and had
3 M, e4 \$ f o2 z9 X* O; {4 `been using protective clothing. A repeat testosterone, [( O6 H: a0 R1 }2 j. d8 ~
test was ordered, but the family did not go to the2 t: X( ^ l, L; @' U7 Z
laboratory to obtain the test.7 K7 _+ s$ P( y: `$ y
Discussion
& x$ Q }8 B+ G3 ~/ J9 g; N1 \Precocious puberty in boys is defined as secondary5 L" K6 H5 C8 f, X* ]! ^# E' _
sexual development before 9 years of age.1,47 f4 K3 V! `) F
Precocious puberty is termed as central (true) when) o" |+ n! Y" x5 w ?9 Y: T
it is caused by the premature activation of hypo-1 x1 Y( F+ v9 m
thalamic pituitary gonadal axis. CPP is more com-
& y2 l1 q V/ i. u) w& D5 v' ymon in girls than in boys.1,3 Most boys with CPP
. ^: r3 M4 m4 D( j0 l* umay have a central nervous system lesion that is
1 h0 [6 p3 I2 F" p/ r4 Vresponsible for the early activation of the hypothal-
2 I* a* |8 j: k# U0 `# O2 Samic pituitary gonadal axis.1-3 Thus, greater empha-' }2 e3 Y# V8 N8 h0 z- A
sis has been given to neuroradiologic imaging in. j+ Y+ }3 a: T3 }$ g) o, w
boys with precocious puberty. In addition to viril-
" W6 ~1 n5 ]+ e* y6 Iization, the clinical hallmark of CPP is the symmet-- l, M& |: {; [/ M
rical testicular growth secondary to stimulation by
2 j6 S: M+ E. S) }( } ygonadotropins.1,33 A+ }% K2 H" d
Gonadotropin-independent peripheral preco-
& ]9 m& f0 B! v: {( Y' Lcious puberty in boys also results from inappropriate: L9 k* D: \. H% j
androgenic stimulation from either endogenous or
' w) u8 H2 O6 \9 E" F- I& Mexogenous sources, nonpituitary gonadotropin stim-4 t) ^+ O( M! A3 V/ x2 O
ulation, and rare activating mutations.3 Virilizing
3 p2 K0 @/ E5 F/ {7 `8 I( v( H wcongenital adrenal hyperplasia producing excessive
8 E5 p" l! l1 W2 s) m& ]adrenal androgens is a common cause of precocious
. c) U: \4 F/ z$ Qpuberty in boys.3,4
" ~/ `+ R) C* `2 J; V8 w" j7 E1 ~3 iThe most common form of congenital adrenal( {% f5 m$ [/ [4 T' ?0 f2 A
hyperplasia is the 21-hydroxylase enzyme deficiency.5 t6 l! f, W# D3 e6 ]. L9 T
The 11-β hydroxylase deficiency may also result in; _# x9 t9 {4 W
excessive adrenal androgen production, and rarely,
( C! P; X7 m2 r- jan adrenal tumor may also cause adrenal androgen
4 b1 x& B [+ _* X" \: fexcess.1,3
) T2 J9 [3 m( H, F4 Kat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
7 c4 H( i% r$ o$ A542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
2 \/ u9 {9 M B! zA unique entity of male-limited gonadotropin-* ~' t5 M7 K' j; W- d
independent precocious puberty, which is also known
$ @) C3 s4 U% }% h/ J {as testotoxicosis, may cause precocious puberty at a
, J. \. i8 d% l8 u; qvery young age. The physical findings in these boys
" c9 t/ G5 U A7 q8 r" v iwith this disorder are full pubertal development,
4 G0 }' b$ g8 r" l+ i4 sincluding bilateral testicular growth, similar to boys o& |) u& O9 M
with CPP. The gonadotropin levels in this disorder& |" V; {& Z, e
are suppressed to prepubertal levels and do not show3 d3 e. K* b- l5 f1 M7 ^! N, [
pubertal response of gonadotropin after gonadotropin-4 w" f0 |- ?; g6 V4 n: F7 J' o( X
releasing hormone stimulation. This is a sex-linked2 i q/ U& x$ h' ]" F4 A& C% b
autosomal dominant disorder that affects only) v1 J- z L. V4 o
males; therefore, other male members of the family1 Q# C0 E4 }2 _( A, z
may have similar precocious puberty.3
3 n$ V8 G5 \1 X+ w6 p4 v( [0 AIn our patient, physical examination was incon-! @1 k9 } K9 Y
sistent with true precocious puberty since his testi-
1 ]9 }2 t6 o, ocles were prepubertal in size. However, testotoxicosis( N% Z6 ?1 g, E
was in the differential diagnosis because his father
, s2 i N1 J5 w6 X* P. v7 h2 `& zstarted puberty somewhat early, and occasionally,) j# }& L* @* N4 w$ U$ S: Z
testicular enlargement is not that evident in the
) W* r- E+ O, X4 gbeginning of this process.1 In the absence of a neg-& ?) I% c7 T" `0 b; B3 j
ative initial history of androgen exposure, our5 d/ s7 T% A: u) X7 x) I7 m
biggest concern was virilizing adrenal hyperplasia,
, S, i2 d8 m( B7 C9 [8 P& h$ Yeither 21-hydroxylase deficiency or 11-β hydroxylase
& w9 ^3 p, l1 L2 }. I0 udeficiency. Those diagnoses were excluded by find-2 f/ ^4 c* g$ J0 D/ k+ F# X) ~
ing the normal level of adrenal steroids.$ k! v. U' U: e* @6 H2 s1 Q; j
The diagnosis of exogenous androgens was strongly u$ x6 z0 Y3 t" `0 I) K
suspected in a follow-up visit after 4 months because' j! S% C$ F1 m- {# T& P P
the physical examination revealed the complete disap-
# l8 q* M8 F" T" M& R: upearance of pubic hair, normal growth velocity, and! D; W& {! Y3 y; ^# I2 [
decreased erections. The father admitted using a testos-
, |' b5 O* _- f7 C- h+ E9 J( N! Z# vterone gel, which he concealed at first visit. He was
9 |) Y+ t Q% s" Y8 {$ ousing it rather frequently, twice a day. The Physicians’3 O& h5 l8 ?4 t2 t% I; {# I
Desk Reference, or package insert of this product, gel or; H6 X5 K, b# U/ }$ U n, [: r
cream, cautions about dermal testosterone transfer to" w! G4 C: w+ d& @, G3 l
unprotected females through direct skin exposure.
9 _' W5 {* @) f4 ]Serum testosterone level was found to be 2 times the
( C) q$ j# t% @7 o& r8 ?0 Kbaseline value in those females who were exposed to- r9 D, Q9 f) Y
even 15 minutes of direct skin contact with their male
5 {9 k5 \" g! e/ J+ Opartners.6 However, when a shirt covered the applica-
: q, i' X+ }6 ]2 F: s# ltion site, this testosterone transfer was prevented.
+ v0 D$ ^ o, b" b/ w6 VOur patient’s testosterone level was 60 ng/mL,
& }8 c( E; P9 b. V9 F; vwhich was clearly high. Some studies suggest that7 L4 ?$ C$ \& ?" u
dermal conversion of testosterone to dihydrotestos-# ]' {1 {1 J/ h- Q' S& T6 h
terone, which is a more potent metabolite, is more; E4 ~" I7 a+ b: e
active in young children exposed to testosterone, c2 Q4 `1 E& p% L9 T
exogenously7; however, we did not measure a dihy-
% N' z; f) J# R# q4 h x7 A5 C$ Ddrotestosterone level in our patient. In addition to) h; s- n1 [) t" B% I
virilization, exposure to exogenous testosterone in
' ?: o$ j- U9 {children results in an increase in growth velocity and
+ D! \) j) u. k' j4 N& n& Yadvanced bone age, as seen in our patient.
0 e7 n9 q! f- [* YThe long-term effect of androgen exposure during
& T, O C/ i- `, R$ ^& |$ f- Eearly childhood on pubertal development and final9 n5 n. Y( a( c. y
adult height are not fully known and always remain* ]. B" m. U: M& F- L
a concern. Children treated with short-term testos-
; d T: w( Q3 ^$ v8 Xterone injection or topical androgen may exhibit some
2 ?$ Y7 | [1 s* ]2 \' M9 T# |) A% Dacceleration of the skeletal maturation; however, after
8 t1 R0 i( M- U5 v% V8 zcessation of treatment, the rate of bone maturation/ f( c* \/ c& c& E" _$ h' j
decelerates and gradually returns to normal.8,9- |) j& |' l. v' m
There are conflicting reports and controversy& D' U1 ^7 m! L0 m* j" g c) ?+ |
over the effect of early androgen exposure on adult, \$ {* F1 t2 o4 ~6 S8 _# }
penile length.10,11 Some reports suggest subnormal
7 j* K) o/ {3 d% a6 \adult penile length, apparently because of downreg-
* F0 o9 o+ U' Y2 e& r8 e/ W9 ?# mulation of androgen receptor number.10,12 However," s) X' e# v% z& U: x
Sutherland et al13 did not find a correlation between% v6 e$ H, i# z$ {
childhood testosterone exposure and reduced adult' W2 x4 S& C! @ W7 p3 I! r
penile length in clinical studies.) v( f, w0 H# {
Nonetheless, we do not believe our patient is
+ C* G8 T) f( e* a: n1 f6 zgoing to experience any of the untoward effects from
% r# v9 A& y4 {2 @$ ]testosterone exposure as mentioned earlier because
# P' p8 c. g3 G/ P6 B$ tthe exposure was not for a prolonged period of time.
* ]$ ^9 Z, I) Z6 O) j- HAlthough the bone age was advanced at the time of
: S* H- R6 l( V; a8 C* {* b! Mdiagnosis, the child had a normal growth velocity at
! b: O5 h: N$ a) {& w' Kthe follow-up visit. It is hoped that his final adult- d, t; ^+ g/ g8 l# f
height will not be affected.) \1 k0 @6 X) z3 Y) W+ V& i m% X
Although rarely reported, the widespread avail-
3 y7 e% J1 x' U) I4 ]. rability of androgen products in our society may" k8 [/ s, @. t) y
indeed cause more virilization in male or female
3 B# m" P% K7 cchildren than one would realize. Exposure to andro-
; B2 ^- E3 c* P* I% Y( x/ G7 `gen products must be considered and specific ques-
- h8 L: N. a: J) rtioning about the use of a testosterone product or
0 \1 f" L3 d0 O R. Mgel should be asked of the family members during; Z9 @! a+ t4 i
the evaluation of any children who present with vir-
) S0 M# n. v$ I0 A: Dilization or peripheral precocious puberty. The diag-
# L3 ]0 D: ~2 [6 n, n- }nosis can be established by just a few tests and by
- ?% b' x. x; L/ J& mappropriate history. The inability to obtain such a
" h* v( s( C7 T* P- }% jhistory, or failure to ask the specific questions, may
4 G0 C# P4 r U! presult in extensive, unnecessary, and expensive
, h/ ]7 M- e3 J8 ]# \3 Q/ J% f3 Minvestigation. The primary care physician should be$ I8 p4 ^4 r# j. [1 U' w9 @. j
aware of this fact, because most of these children9 g9 S2 u& W& Q' X
may initially present in their practice. The Physicians’
2 D& k: O' k9 W8 j3 A! {( vDesk Reference and package insert should also put a s) |( Q6 U; O# f
warning about the virilizing effect on a male or0 N3 l3 n7 W$ C* ^* Z: k* U
female child who might come in contact with some-
0 H( j5 a7 ?$ }8 c b1 j# `one using any of these products.) |4 C0 Q5 D, S+ r/ C0 s
References) ]/ y# h) S* d( C8 t5 v' u8 H) k `8 l. @
1. Styne DM. The testes: disorder of sexual differentiation: R8 ~2 |# k* y% ~
and puberty in the male. In: Sperling MA, ed. Pediatric @" u5 u1 d8 M. [
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;9 ]8 ^* J4 U/ X8 O! M8 @( Z
2002: 565-628.. B0 U$ B L) Q# Z, v2 o7 F
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious4 w. p. T& A$ g
puberty in children with tumours of the suprasellar pineal |
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