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Sexual Precocity in a 16-Month-Old% L/ L! o9 p# k' X0 S* D# y6 Z
Boy Induced by Indirect Topical. p/ P; G1 ~/ ]" z" l6 S
Exposure to Testosterone
2 H4 |$ |8 ?: A1 X2 {* H" K/ R9 M% zSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
) I: B% F5 C1 gand Kenneth R. Rettig, MD1 {& \7 t/ p; r% Y5 J/ M# e8 Y
Clinical Pediatrics$ g7 Z" h8 w& \4 m/ B3 S
Volume 46 Number 60 y8 f+ {, I |
July 2007 540-543
6 @( v/ i# T! T9 H© 2007 Sage Publications
. U) V. J/ v# R4 K+ n# E1 p* C10.1177/00099228062966518 T2 R" \/ ^7 T. | L
http://clp.sagepub.com
; E2 b0 ^9 D- Z# zhosted at
0 O3 d+ ]) V6 T d# W4 Ohttp://online.sagepub.com
: @, J3 d0 T1 u- hPrecocious puberty in boys, central or peripheral,: n# V8 o0 {; X( G3 I6 e2 v
is a significant concern for physicians. Central
- q* d, k, V5 X- O- Y) `& b" i# wprecocious puberty (CPP), which is mediated
$ B0 S3 G, j8 ~$ D/ vthrough the hypothalamic pituitary gonadal axis, has' k- U, w& G! c7 \2 L: \' X# r: _
a higher incidence of organic central nervous system
% A4 q% }2 C. J! X$ W+ Zlesions in boys.1,2 Virilization in boys, as manifested4 {) S' d! @( R/ c- k7 E
by enlargement of the penis, development of pubic
+ D% ^) N. y8 H0 @: x8 t/ ?. \hair, and facial acne without enlargement of testi-; B( D8 Q' \4 y+ O; a/ ?* t: b; u
cles, suggests peripheral or pseudopuberty.1-3 We
. S7 g. v8 T5 H. K! d- V- _report a 16-month-old boy who presented with the) `7 o3 I: u0 {& k
enlargement of the phallus and pubic hair develop-
9 N7 X5 S6 T0 I7 Dment without testicular enlargement, which was due; @0 t' y5 W6 E, z. ?
to the unintentional exposure to androgen gel used by
/ ]( q7 z3 N: M5 Q' F8 O) D7 Kthe father. The family initially concealed this infor-
5 J* `* E2 y% S3 K4 fmation, resulting in an extensive work-up for this
( i/ i. X/ M# F! ^; Xchild. Given the widespread and easy availability of1 h, C H; ~" b% l8 r( a6 n
testosterone gel and cream, we believe this is proba-
+ W5 a, S) ~- ?. w* z% Nbly more common than the rare case report in the3 ?4 F7 ^$ w& ~
literature.4
8 f' a1 N4 c3 h, B0 d) hPatient Report
$ }% B7 V4 d' { [* P3 l9 ?A 16-month-old white child was referred to the
% Q! ~/ S( o. X! V9 r, Jendocrine clinic by his pediatrician with the concern( b8 R6 A: K- G, p% T
of early sexual development. His mother noticed
9 j* ]) e, V0 g3 Vlight colored pubic hair development when he was
$ z/ Q |4 W- ?! u, E, TFrom the 1Division of Pediatric Endocrinology, 2University of4 e$ E: m: I2 T/ `: j4 \, n
South Alabama Medical Center, Mobile, Alabama.
( u. o6 {8 B4 P9 o" aAddress correspondence to: Samar K. Bhowmick, MD, FACE,
1 M9 {$ P: U3 h3 O6 z2 ?, aProfessor of Pediatrics, University of South Alabama, College of
# H$ |7 B1 e; RMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
6 U1 v- _# r1 ?" z- w2 O- L8 T/ ve-mail: [email protected].
" \; J/ Z/ v7 f% l0 ^: w; Eabout 6 to 7 months old, which progressively became. I- @, [* \2 d1 s
darker. She was also concerned about the enlarge-
* X$ T- a [* q# m2 Mment of his penis and frequent erections. The child
R. t C2 [* h' k' H8 [3 Twas the product of a full-term normal delivery, with
" I+ ]( ?6 p% Na birth weight of 7 lb 14 oz, and birth length of
9 p$ y5 \( ?6 B8 }. G20 inches. He was breast-fed throughout the first year
2 {! j* k* [! i4 ]9 I' sof life and was still receiving breast milk along with
$ L: v- d s) ^! isolid food. He had no hospitalizations or surgery,( [1 q! c5 M$ O/ b
and his psychosocial and psychomotor development
* R( i, R. Z6 v7 B/ gwas age appropriate.
( a# a/ o" H/ C' nThe family history was remarkable for the father,
: K" q9 @* w& ?. n$ w- Fwho was diagnosed with hypothyroidism at age 16,
7 H6 c/ b" k3 O5 Qwhich was treated with thyroxine. The father’s
5 ]# G" c, E" j. f) Iheight was 6 feet, and he went through a somewhat) {8 @9 |, { G! F! F5 S% O( C7 u9 w6 L$ q
early puberty and had stopped growing by age 14.
* j/ N2 R X) _9 |: K! f0 WThe father denied taking any other medication. The
7 K e @+ q9 q. I1 D$ I2 i0 Gchild’s mother was in good health. Her menarche
3 ^( ^9 r6 D4 ~8 {2 D. ?was at 11 years of age, and her height was at 5 feet
2 m. {( i2 C) d7 Q+ Y5 inches. There was no other family history of pre-
P) L& v- j b$ S) N8 n- Hcocious sexual development in the first-degree rela-6 e; m0 O* X! y, R
tives. There were no siblings.
Y! p2 I0 h& S6 ^" W7 `Physical Examination
5 H4 S# w7 r9 R4 nThe physical examination revealed a very active,+ ~/ w3 k9 U. P0 i0 }
playful, and healthy boy. The vital signs documented& |! k& p$ `9 l" n, N5 v; ?8 v9 _
a blood pressure of 85/50 mm Hg, his length was( Z( _0 z3 m `* H) J( ^
90 cm (>97th percentile), and his weight was 14.4 kg
& ?% N0 N0 k, W- Z* n(also >97th percentile). The observed yearly growth+ h: i8 V' `* y2 j; C
velocity was 30 cm (12 inches). The examination of
- P* K3 Q7 p* X1 X8 M8 hthe neck revealed no thyroid enlargement.
( l" I9 k+ b/ ]0 ~The genitourinary examination was remarkable for
$ w7 u) h& q+ r" i7 D5 tenlargement of the penis, with a stretched length of7 x- {; ~& S6 v) t( r* H
8 cm and a width of 2 cm. The glans penis was very well' _! r5 g6 t% i
developed. The pubic hair was Tanner II, mostly around
" k. Z9 S l8 S2 {1 W7 O: r& k540; W2 G3 F8 u# G3 Z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
r/ \8 X2 b% c; x* x; I; q) \the base of the phallus and was dark and curled. The _! N+ C: G8 t; p. }
testicular volume was prepubertal at 2 mL each.
1 l4 ^" S, }; G, z2 d* m: }The skin was moist and smooth and somewhat2 `$ V7 O) H2 ^) ~! C5 @, Q. F
oily. No axillary hair was noted. There were no
: X5 T% K2 d H: f$ jabnormal skin pigmentations or café-au-lait spots.
8 E" p$ N( R7 UNeurologic evaluation showed deep tendon reflex 2+9 B. ?. W, n. V- k8 Y1 m
bilateral and symmetrical. There was no suggestion
% P% h6 c0 B# r% D3 n/ ]. P" h& @of papilledema.- o6 ]* K$ i* ^, v n) ^6 `% w
Laboratory Evaluation
. M) }3 K$ U7 i+ \The bone age was consistent with 28 months by+ l7 \) O) E# V
using the standard of Greulich and Pyle at a chrono-
4 H+ @4 G2 S6 V6 m; R( slogic age of 16 months (advanced).5 Chromosomal8 m. L: x/ Y# l" W
karyotype was 46XY. The thyroid function test
7 Z, k5 m* g* M# c# Kshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
c' @. w3 ~5 v& V& ]! J; e' ^lating hormone level was 1.3 µIU/mL (both normal).
9 u7 R$ M. j9 |The concentrations of serum electrolytes, blood
. {( i7 B5 a3 P: e! Y/ d0 x% Lurea nitrogen, creatinine, and calcium all were
! [. y" J3 Y) u9 Awithin normal range for his age. The concentration2 X- ~ F1 u+ `2 m3 N: c$ t
of serum 17-hydroxyprogesterone was 16 ng/dL
( C& k( I6 \6 H$ [7 X* c# p(normal, 3 to 90 ng/dL), androstenedione was 20* V! ~% b9 y) m1 o
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-# s2 k& w8 U q
terone was 38 ng/dL (normal, 50 to 760 ng/dL),/ C+ n8 x6 P* ]5 W- t
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
+ q, A" z- _) P( s49ng/dL), 11-desoxycortisol (specific compound S)) T7 S- T% N" M* e7 L, G
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-5 O6 A' h' x6 g( z
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
, J+ w$ f" }; P* P; Ktestosterone was 60 ng/dL (normal <3 to 10 ng/dL),8 r/ ?) L: ]% p1 L! I
and β-human chorionic gonadotropin was less than
$ E- Q& U1 J2 E+ G5 mIU/mL (normal <5 mIU/mL). Serum follicular) F$ S4 o6 s4 A2 [5 e
stimulating hormone and leuteinizing hormone
$ `% O* B) ~$ \ Qconcentrations were less than 0.05 mIU/mL* l$ a K1 B! O" q" t
(prepubertal).! b9 R: d9 A" v7 k1 s
The parents were notified about the laboratory% j% c M6 ^# \, }' L/ l1 g
results and were informed that all of the tests were
' U& B {% O5 u: z9 X: x K7 n8 @normal except the testosterone level was high. The+ l! ?* k9 _5 f/ {
follow-up visit was arranged within a few weeks to3 N G$ P/ ]8 o% K
obtain testicular and abdominal sonograms; how-
. V. t, H/ W7 y" o( _( Iever, the family did not return for 4 months.
* u- f4 o! c5 OPhysical examination at this time revealed that the: c$ b: C [9 F
child had grown 2.5 cm in 4 months and had gained5 U7 S4 q, H ^0 p- e0 _
2 kg of weight. Physical examination remained
5 t! F6 ^7 L, K2 gunchanged. Surprisingly, the pubic hair almost com- v3 K. l/ e# W
pletely disappeared except for a few vellous hairs at
: }; j" N5 D/ Bthe base of the phallus. Testicular volume was still 2
* H! s8 F. s8 e6 V( L% l% ]' V& LmL, and the size of the penis remained unchanged.; ~% V8 Q/ V2 p- ^! S% J
The mother also said that the boy was no longer hav-
+ {& [8 u+ c) l* v$ A$ g' {ing frequent erections.1 B+ ?4 z+ b6 `" c
Both parents were again questioned about use of
& @( V5 y& F% H2 l0 W Yany ointment/creams that they may have applied to
# a6 j U u. a# Z! Q6 xthe child’s skin. This time the father admitted the
0 J' V( }( U, y# KTopical Testosterone Exposure / Bhowmick et al 5417 f* R3 b; P- z/ G
use of testosterone gel twice daily that he was apply-! P7 n% n9 W" {+ c
ing over his own shoulders, chest, and back area for
7 G! _4 z: B9 H5 C8 oa year. The father also revealed he was embarrassed5 g% b2 k- i+ ~9 c7 @
to disclose that he was using a testosterone gel pre-( ?9 o+ y% n2 o2 j1 I
scribed by his family physician for decreased libido$ v! Y; j, Q/ {
secondary to depression.
# h2 K( j9 l1 c/ KThe child slept in the same bed with parents.$ P0 O, T3 x/ z. |
The father would hug the baby and hold him on his+ P- x; [- n) ^ P2 @1 m( _0 X
chest for a considerable period of time, causing sig-
3 U+ c8 F- u. W. a# `$ _: pnificant bare skin contact between baby and father.
) Q/ G$ [! ?! @9 x8 ]; oThe father also admitted that after the phone call,5 V) W8 g% c. w9 W. ^. g4 ^- l
when he learned the testosterone level in the baby9 Z1 a- c5 F1 r9 u0 a0 N
was high, he then read the product information
# a7 _0 ~6 r( H0 o# W. B5 ]packet and concluded that it was most likely the rea-
' J% I9 _1 N& {: fson for the child’s virilization. At that time, they
7 k+ d# ?6 y: M( e5 Y0 n3 Pdecided to put the baby in a separate bed, and the0 x1 |" \7 y+ k3 M# d, q
father was not hugging him with bare skin and had& X4 v0 s/ M$ v! I
been using protective clothing. A repeat testosterone
8 f$ Q, _/ \: F3 V1 ztest was ordered, but the family did not go to the
9 ~ J3 z. _, n; N; klaboratory to obtain the test.
$ ^0 z, M2 E8 d, L" b7 [! {1 d8 cDiscussion" e- s, p# a' D8 y i I, J
Precocious puberty in boys is defined as secondary4 E, d i E- I% r# L# \% j
sexual development before 9 years of age.1,42 O7 R, L# V6 r; r1 u3 M
Precocious puberty is termed as central (true) when
- u0 i* q; q, B5 W5 Nit is caused by the premature activation of hypo-4 m* L5 u, ]) ]$ B3 o
thalamic pituitary gonadal axis. CPP is more com-
, z1 J- f" [6 K* jmon in girls than in boys.1,3 Most boys with CPP" |' y7 j4 ^! u( J" V, ]
may have a central nervous system lesion that is0 l7 ]* H/ z9 D$ E. i, w
responsible for the early activation of the hypothal-" U3 D9 j6 l. J; |' o: s
amic pituitary gonadal axis.1-3 Thus, greater empha-
5 h! I0 [) q! s x) ~sis has been given to neuroradiologic imaging in' [( V; R, |' `. \" Z
boys with precocious puberty. In addition to viril-
, K. m4 r: f. Mization, the clinical hallmark of CPP is the symmet-
2 B7 L. F- {! i, @$ j% {rical testicular growth secondary to stimulation by- G: k, G! `) n% d: }5 d- H, T2 F
gonadotropins.1,3
$ R& C4 `- L' B2 w" KGonadotropin-independent peripheral preco-
+ [# t L$ |1 C1 {( m7 P6 i" [ r$ C# lcious puberty in boys also results from inappropriate1 C, @# I5 A) ]; Y( O, E3 c1 |
androgenic stimulation from either endogenous or$ O$ i+ j% A8 S; L! {, s; V) g* a
exogenous sources, nonpituitary gonadotropin stim- p9 d9 m# {$ ^1 L/ l2 w9 h' l: l
ulation, and rare activating mutations.3 Virilizing; B0 d" L3 w0 E7 a1 U6 R. q0 p
congenital adrenal hyperplasia producing excessive
2 p8 r9 `& G3 i/ N$ qadrenal androgens is a common cause of precocious, r6 o0 R( W5 ~; i7 z. W- a
puberty in boys.3,4/ t" h F2 W+ P/ Z: A. m
The most common form of congenital adrenal. s$ j. T) T' _$ e
hyperplasia is the 21-hydroxylase enzyme deficiency.: {- c7 d1 i& n T& a
The 11-β hydroxylase deficiency may also result in
# O: J' |; \" Y& @) q* u9 eexcessive adrenal androgen production, and rarely,
/ r% H4 a5 f: C7 B, Y/ b! pan adrenal tumor may also cause adrenal androgen {- `* N) X) _% l8 W* }
excess.1,3- I, t- n8 A% E- s
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- Y* k. C7 }. v+ o3 s5 f
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
8 `/ ]# [ O: U* n. Q9 h, Y2 uA unique entity of male-limited gonadotropin-
' B5 I4 u8 E3 w5 Jindependent precocious puberty, which is also known
- E- S& O( n2 i; [% @+ ras testotoxicosis, may cause precocious puberty at a
. c+ Y! R% F5 ^very young age. The physical findings in these boys
1 Q6 E5 \0 e' Fwith this disorder are full pubertal development,+ a- c' g4 J9 D( A/ p
including bilateral testicular growth, similar to boys
/ F; m$ I5 s) E& Bwith CPP. The gonadotropin levels in this disorder* a7 l( F' d( v
are suppressed to prepubertal levels and do not show+ a: t. u' h# ?/ X' v) P" C
pubertal response of gonadotropin after gonadotropin-
$ v X# f/ c$ ?, V1 jreleasing hormone stimulation. This is a sex-linked
8 o9 P/ {$ e2 }) Aautosomal dominant disorder that affects only |' n6 Z# F- p% n3 @8 Q
males; therefore, other male members of the family
4 |+ G8 _- |9 N& w# M- v' A/ }$ Wmay have similar precocious puberty.37 I. Z; w9 b: W8 {- M) Z
In our patient, physical examination was incon-% H6 G7 N, ?' `1 U/ j. y( I
sistent with true precocious puberty since his testi-- R4 L+ l7 }- y6 q$ [, ]7 |
cles were prepubertal in size. However, testotoxicosis/ C+ M! U7 w+ C
was in the differential diagnosis because his father
1 C9 y! f& g0 ?% Tstarted puberty somewhat early, and occasionally,
1 [* @; q! k/ Ltesticular enlargement is not that evident in the
1 X( n7 J, Y7 ?+ F& f# T1 i- Gbeginning of this process.1 In the absence of a neg-5 h0 j0 _8 Y* C" y4 Y+ [
ative initial history of androgen exposure, our
2 l2 c0 F3 H0 b4 }& x) ]4 N7 w& gbiggest concern was virilizing adrenal hyperplasia,
0 Z2 c8 A9 A) o" Z) ^+ A9 ceither 21-hydroxylase deficiency or 11-β hydroxylase
$ \$ s7 H7 Y* Cdeficiency. Those diagnoses were excluded by find-7 M. P% w. ^9 i1 y. G
ing the normal level of adrenal steroids.! ^) t& ]+ q5 R' o5 k$ M$ q
The diagnosis of exogenous androgens was strongly$ J3 I1 H" e7 R. ?/ w/ o- n
suspected in a follow-up visit after 4 months because& d9 v8 X, q' e' |% C7 c
the physical examination revealed the complete disap-' T7 d" s$ t/ N& `1 f" U
pearance of pubic hair, normal growth velocity, and
" ?/ b: G5 ]0 f$ v4 c2 u( udecreased erections. The father admitted using a testos-9 e$ ~& g2 P8 N+ m8 e
terone gel, which he concealed at first visit. He was
; B) ~' r& W/ n) ~8 Y/ A& s0 xusing it rather frequently, twice a day. The Physicians’
' Y9 M1 N2 K1 M( h' RDesk Reference, or package insert of this product, gel or- T9 I( [. J* |, g" [8 Z5 @
cream, cautions about dermal testosterone transfer to
, o; k" k6 n' O/ C3 J8 u5 s. munprotected females through direct skin exposure.3 ?. t H0 `. |/ q% ^' a9 e
Serum testosterone level was found to be 2 times the
& V n" w: x; L1 sbaseline value in those females who were exposed to$ Y6 r2 X k0 r! Q" _3 N- M
even 15 minutes of direct skin contact with their male: V/ O k* K, q" [, K" [) ?
partners.6 However, when a shirt covered the applica-
6 q0 A3 R; n% J! s5 {7 stion site, this testosterone transfer was prevented.
, G' q7 g' a8 I* u+ v+ Q1 E) j& qOur patient’s testosterone level was 60 ng/mL,* A# z' G- V7 o. v, i
which was clearly high. Some studies suggest that& w/ M# Y! H' v4 R
dermal conversion of testosterone to dihydrotestos-
* \" ~" z# M9 t/ H7 C6 U- |terone, which is a more potent metabolite, is more3 `% Y1 y q8 S; ]
active in young children exposed to testosterone* R$ X/ s M) C" c2 }
exogenously7; however, we did not measure a dihy-3 y( |6 D) ?: a3 T( ^* d
drotestosterone level in our patient. In addition to9 h- I y) ?8 \8 H
virilization, exposure to exogenous testosterone in
0 i. ~. O$ x! M( ochildren results in an increase in growth velocity and- w) h" V3 \. `5 S6 w$ [
advanced bone age, as seen in our patient.% \ f$ J/ r: g
The long-term effect of androgen exposure during
' z9 ~ c# s" iearly childhood on pubertal development and final" ?" r, t1 E8 l1 h
adult height are not fully known and always remain
2 T) k% t2 U* r; ma concern. Children treated with short-term testos-3 g4 C5 m2 ^! I) a) x+ t( Z
terone injection or topical androgen may exhibit some) B8 ?( C& [7 u% X0 s7 W
acceleration of the skeletal maturation; however, after+ |5 @. z% {+ a/ y" @
cessation of treatment, the rate of bone maturation
9 N, @! X1 Z& ~* {/ {" }decelerates and gradually returns to normal.8,9
! n0 F) a! \6 fThere are conflicting reports and controversy6 t+ d! w) _1 b) p, p) z' q
over the effect of early androgen exposure on adult
! I4 T8 c. L( r# ^/ Y5 ipenile length.10,11 Some reports suggest subnormal' z) f, `! h8 `1 J$ I. q7 _) U! H
adult penile length, apparently because of downreg-
- s2 M; }& {( o% G W& _/ vulation of androgen receptor number.10,12 However,
+ u* Y9 P u" U' u0 z4 L, cSutherland et al13 did not find a correlation between: V, _1 ]! G# v7 L: I2 Z' ^
childhood testosterone exposure and reduced adult
/ {; k9 A! {& vpenile length in clinical studies.0 b' J9 a% G# Q6 K- K3 Q4 U \% P0 s* w
Nonetheless, we do not believe our patient is) \$ @) ?( p' f( Z6 ?
going to experience any of the untoward effects from; K# @) s/ e+ j; k4 x* C
testosterone exposure as mentioned earlier because$ X- t/ V# w, G! \- W' O
the exposure was not for a prolonged period of time.
( \9 [. m1 v3 e( _! |8 e$ {3 Q2 ]! sAlthough the bone age was advanced at the time of4 A+ x" y$ B: S4 k
diagnosis, the child had a normal growth velocity at
" Y' z- M, W4 A. V" u8 _0 ~) r5 }the follow-up visit. It is hoped that his final adult; ?' f1 k8 G$ {3 X* j( n9 W
height will not be affected.
1 R, a) g: J1 a0 Q) KAlthough rarely reported, the widespread avail-
( z; `" p$ j/ f. F6 Bability of androgen products in our society may% X0 {9 ~( ?3 r! n! z# m
indeed cause more virilization in male or female+ r# ]" S( g6 U: v/ Q$ _, b
children than one would realize. Exposure to andro-
) S* @3 j" Z; e; Xgen products must be considered and specific ques-9 s9 C9 Y7 _1 f& t( V
tioning about the use of a testosterone product or
! ~: y( K4 z5 }9 M% q* X, Bgel should be asked of the family members during- O# f2 Y! U. x W$ U6 p* `. l3 |
the evaluation of any children who present with vir-
. y: C' ^' j- {, ?ilization or peripheral precocious puberty. The diag-- F% L& j+ e7 c1 Q
nosis can be established by just a few tests and by5 w" @) |' A$ V9 C
appropriate history. The inability to obtain such a
7 l* G8 Z3 P) Z1 j; l, ehistory, or failure to ask the specific questions, may
/ ~0 \5 g' {& f( K, N V2 c" }result in extensive, unnecessary, and expensive
' y E6 }% {$ O: Einvestigation. The primary care physician should be
. q' |3 h" Z/ }) Z" \aware of this fact, because most of these children# C0 o% K4 x% L! K
may initially present in their practice. The Physicians’
7 I! x4 {6 n. `! ]8 L+ \Desk Reference and package insert should also put a
( C$ V# [! k$ o$ w( ~4 hwarning about the virilizing effect on a male or
7 `2 z9 u) Z* j. }female child who might come in contact with some-. r5 l/ M% k* A2 f* ~8 c
one using any of these products.9 `; M+ Y6 p: l1 ~: F" ^
References
. G0 J% q2 A, n- i' S$ F( }1. Styne DM. The testes: disorder of sexual differentiation2 s( Q1 ^/ F: p( k
and puberty in the male. In: Sperling MA, ed. Pediatric
1 t# [; I' X5 E1 W0 y" v8 fEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
4 @% {1 t n2 Q4 s( a- k2002: 565-628., T; v' e. m9 O+ r3 T) v+ _
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious9 I' B) j. D9 R6 ~
puberty in children with tumours of the suprasellar pineal |
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