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Sexual Precocity in a 16-Month-Old, U0 V$ m& w! T6 n9 U( h6 ~
Boy Induced by Indirect Topical- A) |) N3 ?7 q" E
Exposure to Testosterone
5 x8 N, c8 l- K) BSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
( \& M( k# w9 Q6 P; z4 C. Jand Kenneth R. Rettig, MD1! R' i+ N5 B7 n9 J
Clinical Pediatrics7 y9 C% N4 l$ n3 ~
Volume 46 Number 61 K: C; T1 K' r m8 L
July 2007 540-543. l0 ?, X" d$ H* u+ j
© 2007 Sage Publications
. c( m- m C# Y7 W10.1177/0009922806296651
; N+ X/ B% s# q" t5 Fhttp://clp.sagepub.com) j6 ?+ X! q* K% g( S# m5 p
hosted at7 Z1 c2 P" Q: w% _/ f
http://online.sagepub.com' O5 B3 y) |' ?' C" j) V
Precocious puberty in boys, central or peripheral,% i5 U0 ?2 H6 q/ M) k+ }" m
is a significant concern for physicians. Central
3 b8 |8 s& v2 x$ Uprecocious puberty (CPP), which is mediated( _/ Y2 z D0 ^# j2 }% v
through the hypothalamic pituitary gonadal axis, has
9 H, l; ~2 I$ N2 Z% Ka higher incidence of organic central nervous system
; T: k9 m( ` H( K: x! Q' n( [7 klesions in boys.1,2 Virilization in boys, as manifested
3 j: [! P3 K+ p% t8 j: e- Cby enlargement of the penis, development of pubic
! v0 p5 m+ C% i- g6 B4 Phair, and facial acne without enlargement of testi-
% [- [, r' s) P$ E$ V+ ^cles, suggests peripheral or pseudopuberty.1-3 We
" z" c. v( _6 b! T( A5 K+ m, r9 Hreport a 16-month-old boy who presented with the8 K* e- Y( u, c7 t! q
enlargement of the phallus and pubic hair develop-# B4 P6 q! @2 N. r: M
ment without testicular enlargement, which was due2 i1 }9 B, {* V; V' [* c
to the unintentional exposure to androgen gel used by
* T/ V' A2 T2 s$ E9 o" {( Vthe father. The family initially concealed this infor-
/ Z/ k* A3 f; y5 o9 l4 Wmation, resulting in an extensive work-up for this. h/ u' ^* [" U% }
child. Given the widespread and easy availability of
7 ]/ a( ]6 q8 O) r1 Btestosterone gel and cream, we believe this is proba-7 g' i5 Q/ O$ [" {* S
bly more common than the rare case report in the
/ t6 w) P6 ~' t" a1 Q; y0 o4 uliterature.4! s; C7 T7 h2 E& v- ]; c# A
Patient Report
' x* x _( D! T" f; m( jA 16-month-old white child was referred to the
" p' u# r- J0 ~1 j9 Vendocrine clinic by his pediatrician with the concern
5 t0 M. K5 L6 I- k) S! V1 ]of early sexual development. His mother noticed
/ L; g% w# \: X4 m6 wlight colored pubic hair development when he was7 |' O, k' ^& x( L l+ h
From the 1Division of Pediatric Endocrinology, 2University of) u2 |( w- i& \6 u
South Alabama Medical Center, Mobile, Alabama.
$ T* X) e( j hAddress correspondence to: Samar K. Bhowmick, MD, FACE,2 T/ d. K. V+ I9 M
Professor of Pediatrics, University of South Alabama, College of
% Y- V o- U2 _- yMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
7 q( M6 v. o1 |2 Pe-mail: [email protected].
9 C: Z2 _ m* dabout 6 to 7 months old, which progressively became
, R4 w! S% X* o) mdarker. She was also concerned about the enlarge-/ s& o5 z* s( u6 ]
ment of his penis and frequent erections. The child: e; b& \5 `7 o; n, t
was the product of a full-term normal delivery, with
! U" S$ P" \: ma birth weight of 7 lb 14 oz, and birth length of: V+ `3 T8 M7 @2 W
20 inches. He was breast-fed throughout the first year4 C& C' P: N2 F) W* s
of life and was still receiving breast milk along with
( P/ Y5 Y2 a- W, ~; j0 Lsolid food. He had no hospitalizations or surgery,
) H+ ? p6 G) Aand his psychosocial and psychomotor development
! M3 _: f$ P1 b ^0 l- Xwas age appropriate.
: P6 w# e( d" h+ ?9 R( cThe family history was remarkable for the father,
& }3 t* X) e& M4 Q t( kwho was diagnosed with hypothyroidism at age 16,
1 ^' E3 ?8 l5 Cwhich was treated with thyroxine. The father’s- M- K" V2 Z! P
height was 6 feet, and he went through a somewhat
0 t7 z( W! A1 |8 B6 G' `$ tearly puberty and had stopped growing by age 14.7 ^# Q7 U8 A; x3 K5 \! I
The father denied taking any other medication. The h+ q! r/ H* o: i7 p
child’s mother was in good health. Her menarche, C6 j; D R- ]0 e, T
was at 11 years of age, and her height was at 5 feet! g( w' N, `1 T7 _ M
5 inches. There was no other family history of pre-9 g/ o: W) l& _4 ~! y
cocious sexual development in the first-degree rela-
3 f6 b' l/ ?9 N8 v wtives. There were no siblings.- Q4 |; H& a. g) Y/ `
Physical Examination) m# B0 m/ P$ P9 F& P- Y
The physical examination revealed a very active,
, r% ?3 [! j7 F% g9 q$ i' f& T7 ?/ aplayful, and healthy boy. The vital signs documented
1 \7 _2 x0 o6 `2 G* _& b; i. I* ?a blood pressure of 85/50 mm Hg, his length was1 n0 U$ d1 ~' }' y, g2 P* n
90 cm (>97th percentile), and his weight was 14.4 kg
% }! X& g. a8 w6 E0 N(also >97th percentile). The observed yearly growth; G0 U- n7 O" l
velocity was 30 cm (12 inches). The examination of
$ y9 P' g* x% C) g# j7 v+ ^the neck revealed no thyroid enlargement.
+ s: \- M. y9 K, o6 w( rThe genitourinary examination was remarkable for
^4 W' W5 D4 renlargement of the penis, with a stretched length of
. p9 ~( _8 ^! e h; _& u& G8 G8 cm and a width of 2 cm. The glans penis was very well! e5 Q& L8 f2 q3 o( l/ y
developed. The pubic hair was Tanner II, mostly around5 k: X/ V2 |: q0 x U
540. E* ~* m X! P+ i& M" |% R
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* Q) I; p: u9 c7 S& v' vthe base of the phallus and was dark and curled. The
5 p& i4 V% G; _9 f6 ~% `$ |! s5 Ltesticular volume was prepubertal at 2 mL each.
. g% D5 \: S9 A" Q2 ZThe skin was moist and smooth and somewhat
- [5 Y8 S/ }* e, H, `$ zoily. No axillary hair was noted. There were no
% O9 k$ Z/ n k; I. O9 g) s- y) ?abnormal skin pigmentations or café-au-lait spots.
7 ~5 g4 E; `( @* ?( t6 S+ zNeurologic evaluation showed deep tendon reflex 2+4 r$ O* Q2 @4 {9 u, ^
bilateral and symmetrical. There was no suggestion9 C- k- ?* o8 H. |8 v% B
of papilledema., s o: A" O. \3 _- e+ S v
Laboratory Evaluation, e I9 n/ K5 m; i/ f
The bone age was consistent with 28 months by
$ s' x9 J1 P O# W- ^using the standard of Greulich and Pyle at a chrono-7 \0 [0 O3 _( x1 p
logic age of 16 months (advanced).5 Chromosomal- Y% A" H0 M2 J: ]/ L* ^& k' P
karyotype was 46XY. The thyroid function test/ f' ?, z* k5 S
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
; k: K/ z }3 o, }( n+ t. elating hormone level was 1.3 µIU/mL (both normal).. P+ j% e$ I) t
The concentrations of serum electrolytes, blood) V; N. V T) b, c" U* H- O
urea nitrogen, creatinine, and calcium all were
. ]) k! u' ^2 e& D7 d/ y' O# v/ }$ Jwithin normal range for his age. The concentration
% w( U% c0 d1 Uof serum 17-hydroxyprogesterone was 16 ng/dL
8 }. G, H# O( @5 K1 z( |(normal, 3 to 90 ng/dL), androstenedione was 20! O1 X' {: k: K/ F
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-0 x) s. T% K# C
terone was 38 ng/dL (normal, 50 to 760 ng/dL), ]/ |, S3 u/ [1 z% P! ?# E
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
' u, E% y8 ?4 P" r8 [7 ?49ng/dL), 11-desoxycortisol (specific compound S)$ v% p$ _2 ^$ _! b( h
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor- d9 I+ ?0 j: Y, y$ G% i6 G
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
+ D* z! ^% J2 s0 C, K1 n' Atestosterone was 60 ng/dL (normal <3 to 10 ng/dL),9 i6 ]' N+ u, S( Z5 N. c
and β-human chorionic gonadotropin was less than: t# n3 u- I) j( Z( u8 w/ l% |
5 mIU/mL (normal <5 mIU/mL). Serum follicular9 q" a+ E3 x. l4 [0 R* T% W
stimulating hormone and leuteinizing hormone
9 }# h# S# N/ w' u9 p7 f- x: N7 Econcentrations were less than 0.05 mIU/mL
" U. D- W9 o5 W(prepubertal).
( E' g/ m# `' B' l9 P, ?The parents were notified about the laboratory
3 s3 `$ D) A; H0 ^results and were informed that all of the tests were
3 t- l2 K+ W+ a* k+ L) K6 {- e& gnormal except the testosterone level was high. The& l% L& o. W. v0 h0 F# A
follow-up visit was arranged within a few weeks to1 u& R- ]( z" ?0 V& H" N6 ^
obtain testicular and abdominal sonograms; how-
& b" k4 j! `- h, [9 o9 `ever, the family did not return for 4 months.+ r+ n+ t) e4 m* G/ h
Physical examination at this time revealed that the# W2 C, r6 [+ y) P, A
child had grown 2.5 cm in 4 months and had gained# @3 `+ c7 j* S( s$ X- ^, m
2 kg of weight. Physical examination remained
7 R! P4 {, ]. k: R# Eunchanged. Surprisingly, the pubic hair almost com-( H! k# ^! ?7 E" K
pletely disappeared except for a few vellous hairs at
- V4 w! F' K% Z0 I o0 m: Cthe base of the phallus. Testicular volume was still 2/ @; b; p* ]" _6 z2 m3 F, X" y
mL, and the size of the penis remained unchanged.8 t- U! L: a/ B$ j. r6 J; [
The mother also said that the boy was no longer hav-# p, `/ T/ z( z8 v5 F) O# E! D
ing frequent erections.
8 g. u5 K) w* r5 gBoth parents were again questioned about use of
$ ^: m+ m* J. v# D) v& F9 d. ^% Eany ointment/creams that they may have applied to( `' a' ]3 c5 S4 G
the child’s skin. This time the father admitted the' u9 z8 h9 Z( ?
Topical Testosterone Exposure / Bhowmick et al 541
4 n; x# w; ?1 Q, U3 j, x/ \4 muse of testosterone gel twice daily that he was apply-
: I! Z5 V+ e% S+ g- S) ?. Ding over his own shoulders, chest, and back area for
8 \7 ~( w$ Q0 m. f: T0 Z1 y4 Z* Ra year. The father also revealed he was embarrassed; V& Y6 G5 B8 y# d* w
to disclose that he was using a testosterone gel pre-
: X" |6 \- ~! h8 l/ c! G# @scribed by his family physician for decreased libido
" @* ?4 b7 K; l! F; R9 M* R( @, u. usecondary to depression.
5 ~& b- Q: ~& `6 ~' a/ F7 \The child slept in the same bed with parents.
/ d% e$ N: J% Q5 A7 wThe father would hug the baby and hold him on his+ M/ N9 |% E ?8 Y% Y* k
chest for a considerable period of time, causing sig-9 E7 J4 T% J+ t" _* K- {/ \
nificant bare skin contact between baby and father.
5 t0 G' A* B- T6 JThe father also admitted that after the phone call,- w% q+ f9 G# }* N: U a
when he learned the testosterone level in the baby$ T" U) n: @* j) M7 O
was high, he then read the product information/ [0 ~" w' o0 B
packet and concluded that it was most likely the rea-
# \1 n1 V8 f7 j& H$ _son for the child’s virilization. At that time, they
* l* [. p3 A" G8 {( Y1 o/ }( _decided to put the baby in a separate bed, and the
U p, E0 U" a# ]. r% S: M9 R: sfather was not hugging him with bare skin and had! ?+ i! j7 g5 o: f% F
been using protective clothing. A repeat testosterone
" m& Q& t; }% q: j0 S9 Vtest was ordered, but the family did not go to the1 M" C* w4 x/ C, f( O
laboratory to obtain the test.
+ F! J) G% d& m$ @ LDiscussion4 w7 h1 ~$ m* X( B, U. a
Precocious puberty in boys is defined as secondary% j5 G0 N: f) w5 `
sexual development before 9 years of age.1,4; t, j) ], C4 s P8 [! _6 @
Precocious puberty is termed as central (true) when2 o: n! w! r. E9 L
it is caused by the premature activation of hypo-# o" [# f5 B5 i, T0 `5 h
thalamic pituitary gonadal axis. CPP is more com-
) o% V: ^& l' S* }* |$ ^. ^mon in girls than in boys.1,3 Most boys with CPP
0 f: j+ b6 I% d0 D) fmay have a central nervous system lesion that is4 x& t1 J/ S; u- w
responsible for the early activation of the hypothal-; x- k" A; c+ Q% i
amic pituitary gonadal axis.1-3 Thus, greater empha-1 y6 b0 S& m% v
sis has been given to neuroradiologic imaging in( D% f# J( G: S8 K
boys with precocious puberty. In addition to viril-
3 f+ B. H/ a" \ization, the clinical hallmark of CPP is the symmet-
2 ]% Z/ I! D1 [rical testicular growth secondary to stimulation by
- B. B j, C" r V$ i& [0 g5 |, Rgonadotropins.1,3
, f& y) D0 v `3 @* | `1 v7 BGonadotropin-independent peripheral preco-
1 V! G3 p2 [& O* S# k/ i1 Vcious puberty in boys also results from inappropriate
6 z. b9 Z* L+ k( l* p# O! Gandrogenic stimulation from either endogenous or
2 Z+ P, w- R5 p! pexogenous sources, nonpituitary gonadotropin stim-
: H$ J" N9 I4 d) J" M$ Hulation, and rare activating mutations.3 Virilizing
2 o! `/ c* Y2 e" e" s- |. {1 ycongenital adrenal hyperplasia producing excessive
! N7 v* ? j5 Uadrenal androgens is a common cause of precocious0 [; v% H0 f$ I6 f& D# L; R
puberty in boys.3,4
# u$ d) C0 I- _The most common form of congenital adrenal
' v2 P% ]) a! e+ [hyperplasia is the 21-hydroxylase enzyme deficiency. j3 P% U! ]. j. q5 w& v
The 11-β hydroxylase deficiency may also result in
& [9 G2 @ M4 y: {" Q7 P* s; xexcessive adrenal androgen production, and rarely,
4 c' X8 m! {) b z5 Han adrenal tumor may also cause adrenal androgen
7 b. n3 [/ |$ R7 x: l j: Vexcess.1,3
3 g; V" _% H t; s# c9 bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- S" `; ]+ L4 ] P: p- ~9 l542 Clinical Pediatrics / Vol. 46, No. 6, July 2007# [# z0 m9 ?* c' W5 v2 _, Q
A unique entity of male-limited gonadotropin-
, X5 l! o. b- c& c+ I5 e( ?" G9 x9 Zindependent precocious puberty, which is also known
# Z) r6 `- |* Tas testotoxicosis, may cause precocious puberty at a- l" J9 u% X. r' z
very young age. The physical findings in these boys
$ L) E7 t6 ?3 ^4 V# ]' Y! i% nwith this disorder are full pubertal development,4 f$ M1 Z, c+ W# n, x+ h
including bilateral testicular growth, similar to boys
* f4 b) K3 Q* ~. Kwith CPP. The gonadotropin levels in this disorder
% N$ E$ q3 t- U" M4 p4 R0 Iare suppressed to prepubertal levels and do not show2 J( p; R% B! x, T
pubertal response of gonadotropin after gonadotropin-
: f: ]* v, j wreleasing hormone stimulation. This is a sex-linked
3 Z' \3 l9 s( d8 r4 Zautosomal dominant disorder that affects only
, |0 Z) Y, I& |7 F( Y2 Smales; therefore, other male members of the family
' N0 M5 Q3 N: l5 @: ^, P* a, v# Ymay have similar precocious puberty.3
7 V: G, d2 m+ _8 Y+ s1 ?In our patient, physical examination was incon-( X3 v. Z& `/ h! I
sistent with true precocious puberty since his testi-# }1 p1 C0 V- \! }0 d: q$ U" U
cles were prepubertal in size. However, testotoxicosis3 S& Q' |: a) _
was in the differential diagnosis because his father; `+ ]/ g f8 q: ^0 D
started puberty somewhat early, and occasionally,
) C$ [& Y; M$ m6 T Ptesticular enlargement is not that evident in the
( S, S) u& _1 _& Kbeginning of this process.1 In the absence of a neg-
4 c; [) a, ~! I7 i; f* h2 wative initial history of androgen exposure, our' |# _: z3 x; a& B, w
biggest concern was virilizing adrenal hyperplasia,
$ l3 g( n8 m+ @$ Qeither 21-hydroxylase deficiency or 11-β hydroxylase
9 V+ K; a3 s# P" Z( mdeficiency. Those diagnoses were excluded by find-, z# D1 b. V* @0 Z% h
ing the normal level of adrenal steroids./ _- R" ?3 p5 H
The diagnosis of exogenous androgens was strongly
2 ]! X9 M; d! psuspected in a follow-up visit after 4 months because. p9 x) j" a1 _+ U9 o: N
the physical examination revealed the complete disap-
# M( \% ^ f/ _/ Lpearance of pubic hair, normal growth velocity, and
" F' v/ j. H8 f4 Q, z. }% @decreased erections. The father admitted using a testos-
# L8 h: N! q" I; c! t5 n0 D0 Kterone gel, which he concealed at first visit. He was6 |& Y$ z& w0 P/ ^- [8 M
using it rather frequently, twice a day. The Physicians’2 `! H4 @8 H5 }6 \( @; L7 d
Desk Reference, or package insert of this product, gel or
' X: M0 u- D# N& a# wcream, cautions about dermal testosterone transfer to
; o, u: K" q* o& r2 zunprotected females through direct skin exposure.
. H( S1 i' D- l! m8 KSerum testosterone level was found to be 2 times the: a, @0 H0 W9 m" j# M% C0 j' D
baseline value in those females who were exposed to
" S& A! Z% }$ v, B/ I5 aeven 15 minutes of direct skin contact with their male& a5 @" |& F, [: b/ ^9 B$ @' M
partners.6 However, when a shirt covered the applica-
- {5 J( t$ x4 G# T, u1 U, d. Ution site, this testosterone transfer was prevented.
, J1 |8 `$ v- m/ |Our patient’s testosterone level was 60 ng/mL," r8 ?9 j$ q9 `: a5 b$ ]
which was clearly high. Some studies suggest that
: D4 w, R& s( i; @3 ~& Edermal conversion of testosterone to dihydrotestos-7 V# l4 T1 M* b# B1 Y' x2 o
terone, which is a more potent metabolite, is more
, h. k$ r/ x+ Z6 A6 O8 X" X. Y" tactive in young children exposed to testosterone
: Y- |5 [# [2 _exogenously7; however, we did not measure a dihy-/ Y+ s4 ?! c7 T- ~3 t }
drotestosterone level in our patient. In addition to) W' ~) Q* _) z' |- Z9 W( o
virilization, exposure to exogenous testosterone in
5 ~1 v8 E% S# n, U7 Fchildren results in an increase in growth velocity and
# A7 w/ Y' N3 B# \ vadvanced bone age, as seen in our patient.
- t" Y; ?! ^+ tThe long-term effect of androgen exposure during( C" E$ k2 e) P1 t0 T: Y
early childhood on pubertal development and final2 ~3 S+ T- U7 N* d. Q8 }/ m0 a
adult height are not fully known and always remain
6 d4 Z6 U- b/ h W/ M( xa concern. Children treated with short-term testos-
9 c6 m2 L( n6 A) @! qterone injection or topical androgen may exhibit some
' u8 w6 c# @; g4 k% H) V q Aacceleration of the skeletal maturation; however, after
2 f' L+ I" t- `cessation of treatment, the rate of bone maturation
7 V& A" J9 X R; {5 D! N- b* ldecelerates and gradually returns to normal.8,94 ^+ O9 b0 J* @0 y4 z& W
There are conflicting reports and controversy5 Y# Q3 K1 K: `) X/ _# m
over the effect of early androgen exposure on adult. Y6 K; l3 Q4 R$ e$ P( D2 k4 z
penile length.10,11 Some reports suggest subnormal% R% U& t2 H# v: k% p! |/ A5 _
adult penile length, apparently because of downreg-
. a, V/ B0 p5 j$ uulation of androgen receptor number.10,12 However,4 X8 H: H! c0 e) h
Sutherland et al13 did not find a correlation between; R% U# U" s/ D1 |
childhood testosterone exposure and reduced adult
' F c s; P8 k5 Lpenile length in clinical studies.: U* o! U7 H1 U
Nonetheless, we do not believe our patient is
' p- n6 |4 K. Ngoing to experience any of the untoward effects from
8 z. L$ r: f9 D3 ?$ v& Otestosterone exposure as mentioned earlier because
9 f1 x3 l* G$ G4 S1 Fthe exposure was not for a prolonged period of time.
1 M& L( d: b+ [' N" P( ~2 F; @Although the bone age was advanced at the time of
4 {5 f5 ?- M' {diagnosis, the child had a normal growth velocity at
" Z) @2 X# C3 K& Q5 t1 v4 Wthe follow-up visit. It is hoped that his final adult. ^: |( U6 X7 F/ a6 }8 L
height will not be affected.; \+ ~2 J0 L# k1 L# Y
Although rarely reported, the widespread avail-# H( i0 O9 _1 n% \1 T# ?; F7 L
ability of androgen products in our society may6 v+ ?9 @0 a& t
indeed cause more virilization in male or female6 H/ |* `, ?0 U4 `; c1 x9 ^* z: E2 Z) G- U
children than one would realize. Exposure to andro-
5 a9 v5 Z% a$ u8 g6 }3 a8 wgen products must be considered and specific ques-/ p6 f# K) ~: t( R: V0 b
tioning about the use of a testosterone product or
' L0 w# N8 P9 p: M: S% Mgel should be asked of the family members during
1 P- ^9 X! U$ C& e8 {3 x) Bthe evaluation of any children who present with vir-4 L( ?, B( p1 K" d; I8 I1 w( v
ilization or peripheral precocious puberty. The diag-( I$ h7 ^! X3 K' N
nosis can be established by just a few tests and by
6 ]" X1 y8 B! W& Sappropriate history. The inability to obtain such a
' s- Q' j' H) Z% b5 u! {history, or failure to ask the specific questions, may" D+ X$ f2 w8 ~% P; g# q5 _
result in extensive, unnecessary, and expensive3 t9 N" _. D- ^6 N; I
investigation. The primary care physician should be
3 L7 l4 ^! y4 ~# q+ Y/ {$ Haware of this fact, because most of these children" N+ D9 }+ Q& h, |& w% ~4 y
may initially present in their practice. The Physicians’0 b/ q8 B' K3 N+ ^1 b
Desk Reference and package insert should also put a. x- y" d, p& B
warning about the virilizing effect on a male or
/ t3 P5 R+ v" H6 _% ~female child who might come in contact with some-
: V. G% Z6 T4 Z" @ p4 `+ \one using any of these products.
1 I6 @7 O2 t6 n. b0 Y; n4 V4 pReferences
! `9 E- U* {& }' P: c- g1. Styne DM. The testes: disorder of sexual differentiation
1 @/ x+ x: {. F. _0 m5 tand puberty in the male. In: Sperling MA, ed. Pediatric0 g/ f- Q# b- X; f; C7 Q3 ]; _
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
- |4 {( Y" i4 M; R0 X9 r9 @2002: 565-628.
. y# C9 p) L# G2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious' c" L t( _6 F
puberty in children with tumours of the suprasellar pineal |
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