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Sexual Precocity in a 16-Month-Old
1 L( _# ~# d% \2 l; r* _5 CBoy Induced by Indirect Topical
4 D5 k" X5 D. z9 U0 TExposure to Testosterone
9 a$ a- b) @: @+ s/ f/ g$ j. p5 SSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
7 H- w0 q: a' P& ]and Kenneth R. Rettig, MD1! q% q8 s0 m# y+ I7 v2 h9 ]9 T9 t
Clinical Pediatrics9 a* @) g+ w: \7 ^
Volume 46 Number 6
* @; t2 w% {3 ]July 2007 540-543
- s& _2 z+ Z& O9 r& V% c© 2007 Sage Publications( d. Z3 @, u; F8 K! C7 V. F" G
10.1177/0009922806296651
4 @& ~4 T( V& E3 X$ j0 ihttp://clp.sagepub.com/ D9 ?1 [. c5 v W3 s# V4 u
hosted at* U1 l$ `* r* [! n. Y
http://online.sagepub.com
! _+ c; y& l* K i& V4 l% {Precocious puberty in boys, central or peripheral,
# U& N* @& ?/ o7 @. ^is a significant concern for physicians. Central+ V7 j% ]- r+ Y4 [: r
precocious puberty (CPP), which is mediated* G0 K3 |/ k; x6 { C' ?1 W9 A
through the hypothalamic pituitary gonadal axis, has" b! P7 Z% l7 K/ Y" C1 s$ ?& c
a higher incidence of organic central nervous system! A+ j$ J$ n$ Y9 u
lesions in boys.1,2 Virilization in boys, as manifested
* J, A! e7 u T0 F' _ P! V5 ]+ H6 Yby enlargement of the penis, development of pubic
+ Z* `+ I: J2 E9 ^" Hhair, and facial acne without enlargement of testi-" Z P+ x) r6 _
cles, suggests peripheral or pseudopuberty.1-3 We
4 F% C$ B; E$ ~5 Z$ J" j% ereport a 16-month-old boy who presented with the
% D; t; } E# oenlargement of the phallus and pubic hair develop-
: }+ e; T2 Y- [1 W: t% ament without testicular enlargement, which was due* n" p& ~; o+ M& T2 c' o0 T5 x$ Q, g
to the unintentional exposure to androgen gel used by
# x! U) ]2 C# Q& F2 uthe father. The family initially concealed this infor-
* q' \( }' j, w' d5 ~5 H+ fmation, resulting in an extensive work-up for this
8 ] L V. }" [3 |5 I+ `child. Given the widespread and easy availability of
% I# B7 T% o1 Y. Y$ @5 l. ctestosterone gel and cream, we believe this is proba-# w; \! }1 f: D# C9 T
bly more common than the rare case report in the. K; y7 C3 c# r# {! a
literature.4
4 _/ n8 p M% M- L4 F; B1 G7 uPatient Report
/ Q# b3 R, h4 _$ J+ O' D: [A 16-month-old white child was referred to the
6 h7 F; c8 B p4 @- C+ I0 Fendocrine clinic by his pediatrician with the concern0 [* \$ p7 H, C& M( A
of early sexual development. His mother noticed
" R! I* X+ J8 U" @light colored pubic hair development when he was8 Q8 l! Y b3 \7 k
From the 1Division of Pediatric Endocrinology, 2University of1 q/ R0 s! m$ h& `- J& o% O0 @
South Alabama Medical Center, Mobile, Alabama.
2 h, p# m- q/ O2 Y# z" ^6 t7 OAddress correspondence to: Samar K. Bhowmick, MD, FACE,9 f! b" f) o2 X: z
Professor of Pediatrics, University of South Alabama, College of! n/ w8 c& g( c
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
$ W5 }7 ?% d7 Z) h) ]. ke-mail: [email protected].
! F, k4 s3 X5 [! f, J" ]about 6 to 7 months old, which progressively became. E1 N* }/ o! c V8 K* p9 f
darker. She was also concerned about the enlarge-% g5 i3 E8 O$ X2 [% l! q- h, r
ment of his penis and frequent erections. The child
( ~; L. X, \2 F" qwas the product of a full-term normal delivery, with
h+ H; w- Z: U' o, v2 k$ Oa birth weight of 7 lb 14 oz, and birth length of0 q! m" M- K+ p- A- s0 g& w
20 inches. He was breast-fed throughout the first year
2 g& u2 Y @* e* Z9 Oof life and was still receiving breast milk along with' { P% j- `5 M4 Y' F
solid food. He had no hospitalizations or surgery,
) A+ q+ U6 S- f9 [3 @; O8 P. zand his psychosocial and psychomotor development. u7 j: |; |: g' H; Y
was age appropriate.# c d% S' j7 I$ r9 {( h! ^& h
The family history was remarkable for the father,* o1 P2 G, u5 f' r7 U$ k
who was diagnosed with hypothyroidism at age 16,. x4 t( D# w6 V; N) T
which was treated with thyroxine. The father’s
0 _# X8 s& H8 w3 [# x- ~height was 6 feet, and he went through a somewhat1 `* }7 o, S6 z* p- i& X% H" h) W
early puberty and had stopped growing by age 14.4 H" Y( p% T8 q- @
The father denied taking any other medication. The
# v3 M6 G: l& k% c" Schild’s mother was in good health. Her menarche
3 |3 ?, r8 ?/ ` _; _was at 11 years of age, and her height was at 5 feet0 U. g4 z& x; p4 T
5 inches. There was no other family history of pre-# h' \. f* W* z8 Q4 m; K0 G
cocious sexual development in the first-degree rela-( G1 p: t/ ^+ }7 f" E2 N$ r
tives. There were no siblings.* D9 @( |6 ]; j8 S+ s
Physical Examination
) O, ]2 z+ N0 y, V8 FThe physical examination revealed a very active,2 V& L2 W" e( |, |, g
playful, and healthy boy. The vital signs documented+ \+ u7 N* b5 i- k9 ~
a blood pressure of 85/50 mm Hg, his length was L. r1 K! e1 G$ K/ ~
90 cm (>97th percentile), and his weight was 14.4 kg/ e" ] h6 `1 g, d
(also >97th percentile). The observed yearly growth
5 H' l" J5 v. Dvelocity was 30 cm (12 inches). The examination of
# a1 c: O1 M6 athe neck revealed no thyroid enlargement.
" ~1 A" @8 q& F, ZThe genitourinary examination was remarkable for# C! v7 a( n% ?
enlargement of the penis, with a stretched length of
$ ~! E) M1 S# ?1 m' U$ i k8 cm and a width of 2 cm. The glans penis was very well
% {* m- E5 n5 R6 i" t& |developed. The pubic hair was Tanner II, mostly around- v' W# H$ ]/ S7 R1 Q9 A V- P
540
, U" Q- f* R, @at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from2 Y: W+ v4 k: q! C7 o( g
the base of the phallus and was dark and curled. The/ q" }/ S$ |& \6 }$ _( a. l
testicular volume was prepubertal at 2 mL each.- U! v; {' ?: _; L/ i, @3 K% ]: O" e% T
The skin was moist and smooth and somewhat
% Z% r4 W4 o# m# ~5 B9 joily. No axillary hair was noted. There were no3 J4 L. `# n. S1 ^
abnormal skin pigmentations or café-au-lait spots.
* f+ d8 a+ R' WNeurologic evaluation showed deep tendon reflex 2+1 L5 G( J- K" G6 t
bilateral and symmetrical. There was no suggestion! J) q N( d- m0 {
of papilledema.
# b$ ?. ^% g1 ?Laboratory Evaluation# r8 R: G1 C* {9 c( r2 f0 C7 [
The bone age was consistent with 28 months by
. o, }: C# m. W( _8 E! q& dusing the standard of Greulich and Pyle at a chrono-
* M8 i" h0 |: k- qlogic age of 16 months (advanced).5 Chromosomal' Z \8 L& M2 U2 m
karyotype was 46XY. The thyroid function test- u9 ?- [# |: w7 r5 X/ u
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
2 |' S& A3 ~: klating hormone level was 1.3 µIU/mL (both normal).1 K4 f1 H, k% ]* p
The concentrations of serum electrolytes, blood& ]9 W" Y* `! v+ F: Q( U
urea nitrogen, creatinine, and calcium all were1 U0 U' ]: I5 j' F+ k6 p
within normal range for his age. The concentration9 w1 j' Y2 Q, ]) d7 T6 `" G
of serum 17-hydroxyprogesterone was 16 ng/dL% S2 ^7 @* P! Q# e6 _+ T
(normal, 3 to 90 ng/dL), androstenedione was 207 n' F' w+ A9 q
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
: P) h& @- K h5 ]& jterone was 38 ng/dL (normal, 50 to 760 ng/dL),6 c! u2 }0 v+ [5 h' v+ T0 @- p
desoxycorticosterone was 4.3 ng/dL (normal, 7 to3 \& }+ r2 w) s7 k7 u; S
49ng/dL), 11-desoxycortisol (specific compound S)3 K9 |0 \/ x% t: J
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
6 v& d4 Q$ Z# W6 `tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total- ]8 e7 t' d, \3 N
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),9 [, ~- q7 T0 U" k3 X1 V
and β-human chorionic gonadotropin was less than* h1 e& Y; v- T- h1 h$ U
5 mIU/mL (normal <5 mIU/mL). Serum follicular4 ~ J2 ^2 ~5 V: Y
stimulating hormone and leuteinizing hormone
$ \+ X7 L* V, v# k" G8 B& N2 Jconcentrations were less than 0.05 mIU/mL
6 v5 t4 o; z8 H; v" m(prepubertal).! C3 y. X R& }6 N, v* k
The parents were notified about the laboratory
$ s* X" U! K% |/ D) Vresults and were informed that all of the tests were" x. n: F1 h# t: n# Y' Z
normal except the testosterone level was high. The& Q2 d. Y1 n1 A& @5 m0 W( u
follow-up visit was arranged within a few weeks to5 `0 ]$ o2 F$ w( B3 L& R8 v) S6 N
obtain testicular and abdominal sonograms; how-
& b* M5 v3 Z4 n+ x5 n eever, the family did not return for 4 months.
$ k) n( B; ^, o% e' ~, C' zPhysical examination at this time revealed that the
& W; ]% i9 Q6 k5 k7 M( e( [9 qchild had grown 2.5 cm in 4 months and had gained" M u: l; E8 j+ S+ A8 p8 j5 g
2 kg of weight. Physical examination remained8 i$ H& g4 o8 [& U. u; r- k6 R. R
unchanged. Surprisingly, the pubic hair almost com-( P1 ?( @# _! [# @1 v' x
pletely disappeared except for a few vellous hairs at7 F3 [) P2 c+ N a
the base of the phallus. Testicular volume was still 2
& M! P/ s+ V* ]# V( g& GmL, and the size of the penis remained unchanged.
% b. j8 L* m: U( q1 v% NThe mother also said that the boy was no longer hav-
7 [" s! C+ F2 v- W5 W+ hing frequent erections.7 O5 Q6 Z9 d- b# _+ @- \
Both parents were again questioned about use of
0 }3 t% O- h* d3 Kany ointment/creams that they may have applied to
' v' S, v8 G# ?9 Lthe child’s skin. This time the father admitted the
) \& v, l6 [$ S, _3 tTopical Testosterone Exposure / Bhowmick et al 5419 N- f2 S8 G7 z3 }' d8 G, t* D
use of testosterone gel twice daily that he was apply-/ q+ m; J! F5 |6 m2 U2 Y
ing over his own shoulders, chest, and back area for
% l# C* g, C L2 F: W; za year. The father also revealed he was embarrassed
/ e! m7 K9 z* F, [to disclose that he was using a testosterone gel pre-
, x7 [; K5 @* Y3 v2 ^# @% Kscribed by his family physician for decreased libido) b4 [, b) t* O$ J4 e/ S+ ` B6 {
secondary to depression.2 E1 D% N0 M0 O* j
The child slept in the same bed with parents./ O8 o" H6 G& C5 z) w
The father would hug the baby and hold him on his$ |4 S; x. ^* P9 {
chest for a considerable period of time, causing sig-8 _) O1 C0 o5 z7 m8 |) g( c
nificant bare skin contact between baby and father.
2 @, W8 w' C% sThe father also admitted that after the phone call,& ^' K+ u% i* }
when he learned the testosterone level in the baby
9 K0 c2 A% r) u2 P4 Jwas high, he then read the product information
7 K' k g* m6 H( k- f' wpacket and concluded that it was most likely the rea-( e" a$ ~! L1 |2 F9 e$ A. j0 S; p
son for the child’s virilization. At that time, they
/ D$ `4 c; m. h0 n+ Vdecided to put the baby in a separate bed, and the+ y. v. d9 T; a/ a
father was not hugging him with bare skin and had" r1 \% k" r/ M/ v& X5 K
been using protective clothing. A repeat testosterone0 R" S0 _6 U; P0 C: F! i
test was ordered, but the family did not go to the8 @/ F/ L' _$ [1 P( G- N
laboratory to obtain the test.
3 @5 |6 a+ u e. ?3 UDiscussion6 F8 S X+ x; z8 P+ y
Precocious puberty in boys is defined as secondary
& [, b: T# A0 p) }' z( Esexual development before 9 years of age.1,4
$ f, e# g% c- F/ u9 B1 \1 wPrecocious puberty is termed as central (true) when3 k N1 K* ^, c: b
it is caused by the premature activation of hypo-
; I! k. g* N0 @% u# G- Athalamic pituitary gonadal axis. CPP is more com-+ I) ?, Z7 h; O5 u+ a
mon in girls than in boys.1,3 Most boys with CPP
% s& u# b0 B2 a# [3 r1 p( |may have a central nervous system lesion that is
n3 t9 j" {! q7 @responsible for the early activation of the hypothal-
$ ^! T2 e5 U" gamic pituitary gonadal axis.1-3 Thus, greater empha-
! @/ b# ]" W/ I7 jsis has been given to neuroradiologic imaging in% }* g9 m3 ?/ t6 f2 U) {/ c5 ^
boys with precocious puberty. In addition to viril- B/ ^6 @8 x: d E1 a0 J
ization, the clinical hallmark of CPP is the symmet-. A7 F$ Z& ?. l0 b: E% \8 G
rical testicular growth secondary to stimulation by
' D/ t% v6 L9 K' [. b- G. ygonadotropins.1,34 U: q$ S( S, c
Gonadotropin-independent peripheral preco-! y% h, Z/ a7 S! u1 e3 p
cious puberty in boys also results from inappropriate
2 H" I! L' R1 T& U2 |" vandrogenic stimulation from either endogenous or
/ f& C/ U2 m5 r+ aexogenous sources, nonpituitary gonadotropin stim-
. Z/ M8 g2 R1 H" Z* ?ulation, and rare activating mutations.3 Virilizing( y; M+ H* X( z0 o; y
congenital adrenal hyperplasia producing excessive
, k v1 `6 \; n+ Oadrenal androgens is a common cause of precocious! b) F2 V. M3 e- v }
puberty in boys.3,4
' N6 @ O! M/ pThe most common form of congenital adrenal
7 O" M7 @* P9 d* } whyperplasia is the 21-hydroxylase enzyme deficiency.4 l' J! v, ?# D& @, a3 K& n
The 11-β hydroxylase deficiency may also result in
( ?( M- U5 t' G$ ^excessive adrenal androgen production, and rarely,# O% {- l% W+ D$ h( f- o
an adrenal tumor may also cause adrenal androgen
v _- o# X2 s8 j, \excess.1,3& V Q; {& t- G. d C3 F4 H
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from5 O/ }# {- Z3 {3 ~: k, x' M
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 n: f4 b4 U' f6 i H
A unique entity of male-limited gonadotropin-
7 f3 X0 O" Z, x# N- }# qindependent precocious puberty, which is also known
& ?% S$ g+ S% V6 gas testotoxicosis, may cause precocious puberty at a
% M! }; j$ E8 \! I Ivery young age. The physical findings in these boys
4 d, w! C# U$ i: p& Fwith this disorder are full pubertal development,
% m! _9 r3 z9 W8 kincluding bilateral testicular growth, similar to boys
0 m { ^/ P e9 P" g2 Jwith CPP. The gonadotropin levels in this disorder P+ i- L5 j5 V+ X8 G
are suppressed to prepubertal levels and do not show
) x& x& E8 V7 B$ {0 e5 Y3 Ppubertal response of gonadotropin after gonadotropin-
- n' N7 f! f% M* a( preleasing hormone stimulation. This is a sex-linked) u3 c4 x. p8 C8 o- ^
autosomal dominant disorder that affects only4 ~$ B# I7 q* k( k/ o% }7 r* o
males; therefore, other male members of the family
5 T$ @$ y6 A4 c$ y9 e- H- W6 X6 wmay have similar precocious puberty.3
! h( z( j0 [$ I+ C9 B" M) _In our patient, physical examination was incon-" ]+ ]5 s+ H5 p: g0 D
sistent with true precocious puberty since his testi-
0 w. w# k* O3 B# v* ?7 Z" p8 n8 ^cles were prepubertal in size. However, testotoxicosis K* f! y; x9 M/ Q
was in the differential diagnosis because his father) C. [& T9 b e- G0 ^
started puberty somewhat early, and occasionally,
6 i9 v w+ V k- C/ M8 @# z! ptesticular enlargement is not that evident in the
% y/ V) g7 `4 u$ \. Dbeginning of this process.1 In the absence of a neg-6 D" w0 z4 d7 n$ m7 B' Y0 m
ative initial history of androgen exposure, our
' h! |4 K* e) nbiggest concern was virilizing adrenal hyperplasia,0 L E, a( {+ M3 G5 A. k, [
either 21-hydroxylase deficiency or 11-β hydroxylase- R$ O' a$ [& c. P9 p T$ S7 w, h
deficiency. Those diagnoses were excluded by find-. g# X( B' \3 A6 Y6 E6 ]
ing the normal level of adrenal steroids.
/ a, m3 |$ c( x. K. PThe diagnosis of exogenous androgens was strongly
1 x+ F! l9 ]% B ^* }" R$ Isuspected in a follow-up visit after 4 months because
; z3 f! S! G8 F# Qthe physical examination revealed the complete disap-* u) n( x* C+ b' V1 t
pearance of pubic hair, normal growth velocity, and
/ v5 p$ q9 F( P8 r q5 ]8 pdecreased erections. The father admitted using a testos-
! a, t7 o. [9 M9 Gterone gel, which he concealed at first visit. He was( P: T& {" F1 d0 `
using it rather frequently, twice a day. The Physicians’
( i! p" o9 ~+ S0 PDesk Reference, or package insert of this product, gel or
( y: s `' s( Ycream, cautions about dermal testosterone transfer to
" l( D+ C; f6 d. d; Hunprotected females through direct skin exposure.
# `3 F3 V9 G8 ^; K/ \. P; xSerum testosterone level was found to be 2 times the4 G- {0 W Q& i1 `9 X: D2 u7 `2 U
baseline value in those females who were exposed to; d; ]) [" h6 K& m; |6 d
even 15 minutes of direct skin contact with their male+ Q) z8 n: V- ?+ f
partners.6 However, when a shirt covered the applica-
3 s! G Y6 P1 N0 ~- I8 H' @tion site, this testosterone transfer was prevented.
* G! E6 _* S2 [; y( U. v& bOur patient’s testosterone level was 60 ng/mL,
2 b7 g- A& l2 W% n! P3 |( M! ?which was clearly high. Some studies suggest that: Y P6 ]/ @3 e1 v
dermal conversion of testosterone to dihydrotestos-: N# E' f# m9 c+ w$ t
terone, which is a more potent metabolite, is more
1 f$ {& G% b3 U' S4 ]8 U1 q6 j& Iactive in young children exposed to testosterone
6 j2 F5 H5 U" U5 sexogenously7; however, we did not measure a dihy-" I9 ^# L# `. w2 d1 {/ ^+ z8 s, A
drotestosterone level in our patient. In addition to
/ `% o; t {% G" p, {2 dvirilization, exposure to exogenous testosterone in
$ g; B4 R" P. ]+ h9 e, [* Vchildren results in an increase in growth velocity and9 o9 F8 G+ c. b5 ?* b6 ~3 m: a( ~
advanced bone age, as seen in our patient. V5 J3 z% ^/ x6 P4 I- w# z
The long-term effect of androgen exposure during
2 j; U+ t6 P. t; E# N7 Gearly childhood on pubertal development and final( E0 L6 |. \5 E# h( ~: h- f
adult height are not fully known and always remain
6 C! {% k2 \+ D. F/ Ra concern. Children treated with short-term testos-
0 e& q- P( z! o8 \) [+ s3 X5 mterone injection or topical androgen may exhibit some* k$ x6 }! P3 X# [. A
acceleration of the skeletal maturation; however, after) m7 a$ |" w* J
cessation of treatment, the rate of bone maturation4 y5 n# x' Z) q
decelerates and gradually returns to normal.8,9
7 k* `4 v/ o: o3 T5 RThere are conflicting reports and controversy' K% ^* }4 c* Q" e9 n
over the effect of early androgen exposure on adult' ^6 }8 H% ~- l$ X
penile length.10,11 Some reports suggest subnormal, a7 n" W( m- G) {8 T* A
adult penile length, apparently because of downreg-
5 B8 V2 A! G, z; T. X# ]" U# d+ xulation of androgen receptor number.10,12 However,
. z) r/ o3 ?4 `. [8 A0 H& uSutherland et al13 did not find a correlation between
5 }) @- K1 \- _childhood testosterone exposure and reduced adult
" N$ I& w4 l& u) n- lpenile length in clinical studies.
\* o; q" T- d- jNonetheless, we do not believe our patient is
/ T3 I, l# l/ b6 _/ M& Y Xgoing to experience any of the untoward effects from( _1 B7 X$ |- S# c
testosterone exposure as mentioned earlier because
$ b7 O" ^ ~& @1 q; Tthe exposure was not for a prolonged period of time.! P6 S5 {' d0 Z& M% Y
Although the bone age was advanced at the time of0 [! R) C# J0 _! ?* R+ h6 @
diagnosis, the child had a normal growth velocity at
. O/ |# z& d/ n0 }/ ^8 rthe follow-up visit. It is hoped that his final adult
8 Z9 {. x6 w. S/ j; M! F3 eheight will not be affected.
- T; b7 ^9 r; ]2 i$ gAlthough rarely reported, the widespread avail-
: g1 W, n. S- }# ?, l* Y& p) M' aability of androgen products in our society may. y3 U! z% S# y6 B( b) X- c
indeed cause more virilization in male or female
^9 {: s) \$ vchildren than one would realize. Exposure to andro-3 N, R9 g) n: h. V
gen products must be considered and specific ques-9 E* s' G- C& e" ?! S, e
tioning about the use of a testosterone product or
1 T% D. g! [8 x7 k/ Ugel should be asked of the family members during9 _0 T H2 o) ~! y B6 f Y' z
the evaluation of any children who present with vir-8 D9 J% F% t5 {# Z! S
ilization or peripheral precocious puberty. The diag-$ ^# p1 f* ^: A- k- B, y( g
nosis can be established by just a few tests and by: r( Q3 Y( f, P
appropriate history. The inability to obtain such a' {8 h6 ?/ F3 A( p
history, or failure to ask the specific questions, may1 A# u% p7 Y- l
result in extensive, unnecessary, and expensive
; ]0 z% W: P1 H T* ainvestigation. The primary care physician should be# E2 M3 c- U* U) g
aware of this fact, because most of these children; `, N8 ^6 s2 g& W7 z8 V
may initially present in their practice. The Physicians’
j8 s) t2 R7 i0 ~ h1 iDesk Reference and package insert should also put a
/ A5 w- W; S9 _2 V+ J/ Kwarning about the virilizing effect on a male or
3 ?. L1 Y% M1 [2 z Y- {- xfemale child who might come in contact with some-
$ l- r. r5 ?3 ^7 |one using any of these products.
' _/ d. u% Y' T$ @) EReferences8 D- O {# N2 O, t
1. Styne DM. The testes: disorder of sexual differentiation
/ D% M( A5 [) I8 `8 p/ l0 o1 r$ Aand puberty in the male. In: Sperling MA, ed. Pediatric
$ J- O, j" o- _2 Y2 N; L: fEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
- I( B# E! f3 F( x$ `+ z+ g2002: 565-628.5 A4 f& n1 R, R g: O
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
$ u F+ l3 s) _: b7 G3 C7 A' hpuberty in children with tumours of the suprasellar pineal |
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