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Sexual Precocity in a 16-Month-Old, I, v% C/ N7 Q/ {, R6 N
Boy Induced by Indirect Topical
f2 U( p* v" OExposure to Testosterone
0 W. G( e& i0 v% OSamar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
+ v) _; @6 P( m2 [and Kenneth R. Rettig, MD1
1 C5 o* ]2 r* N1 l2 O% e$ PClinical Pediatrics
1 [8 w9 n! Q9 n: |Volume 46 Number 6
3 ~ y! ~2 {- w) C6 D) HJuly 2007 540-543
7 y B" |1 g: j© 2007 Sage Publications
. t, j+ R0 [8 O10.1177/0009922806296651, o1 K% s, g, [
http://clp.sagepub.com* l) B& |% R0 ]
hosted at
0 N( i1 T' |& C+ P+ Ohttp://online.sagepub.com: s% T3 c6 a, v$ v! ~
Precocious puberty in boys, central or peripheral,# r8 h, b) U$ p5 i$ d
is a significant concern for physicians. Central" `/ d0 u+ _1 ?# g: z# \" |
precocious puberty (CPP), which is mediated* r0 S/ \# F1 K0 e* \1 N. w
through the hypothalamic pituitary gonadal axis, has
; D( D3 b8 J9 g# x$ d d& Na higher incidence of organic central nervous system
# u" V0 @- e& \/ Clesions in boys.1,2 Virilization in boys, as manifested
8 C! a P3 @" f3 R4 X$ Q1 _by enlargement of the penis, development of pubic
9 R5 R9 a5 d1 U; k9 [7 c. O I6 yhair, and facial acne without enlargement of testi-5 s& ?( {3 e) R0 Q/ e
cles, suggests peripheral or pseudopuberty.1-3 We
( G5 x& ~5 S9 |/ _5 _$ e1 \4 vreport a 16-month-old boy who presented with the2 T# V, q1 Y8 W+ m$ E# Y( \/ {8 Z
enlargement of the phallus and pubic hair develop-1 }8 {# U& \8 ^
ment without testicular enlargement, which was due
& [- h" q8 z" P1 X: C9 {* Oto the unintentional exposure to androgen gel used by
' ?2 N# Q c# L1 ]the father. The family initially concealed this infor-* N4 E3 S9 E9 a+ H) f
mation, resulting in an extensive work-up for this) y+ P1 @6 B; d
child. Given the widespread and easy availability of
. z8 f; e% [/ etestosterone gel and cream, we believe this is proba-" c; K+ }6 t. r$ t6 m$ S& e) {8 ~
bly more common than the rare case report in the
2 X( E' ^& K6 V8 V6 ? h8 f! q* zliterature.4
5 R. N/ Q4 y: ^! o5 f, ~Patient Report
# V6 x7 E! ~& U3 I" e8 ^A 16-month-old white child was referred to the. n3 M: K; E# r, h" [
endocrine clinic by his pediatrician with the concern
+ B* E8 ~# B7 W# E( lof early sexual development. His mother noticed
* ]. x2 i0 O2 P4 V' ylight colored pubic hair development when he was
- B0 v' e) w$ V0 {& cFrom the 1Division of Pediatric Endocrinology, 2University of O; a8 q; q$ G. b# e/ I
South Alabama Medical Center, Mobile, Alabama.
4 Y. U+ n7 e N9 UAddress correspondence to: Samar K. Bhowmick, MD, FACE,
1 Z8 `% y/ R1 {/ hProfessor of Pediatrics, University of South Alabama, College of
$ O( p+ ^4 R5 G0 y9 u% W' ?3 qMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
; d z. Y; Z3 [e-mail: [email protected]. P) D, q, F" t- |% M
about 6 to 7 months old, which progressively became
3 L7 Q. G5 p: x* X3 s$ a3 cdarker. She was also concerned about the enlarge-% D7 D! W. o3 x) z
ment of his penis and frequent erections. The child [9 A' D7 |% C5 _" m" f: R% l1 y- Y
was the product of a full-term normal delivery, with# A [0 k6 ~. M- A' w
a birth weight of 7 lb 14 oz, and birth length of9 A3 S2 g6 _6 \ z# f! R. x1 J
20 inches. He was breast-fed throughout the first year% g2 k/ W7 {& S* I( }9 S1 d- |! L
of life and was still receiving breast milk along with! `, {( t, J2 ?# k! t
solid food. He had no hospitalizations or surgery,
' Z T, x0 h& L9 [and his psychosocial and psychomotor development- B4 P7 Y9 d7 |, H' t) V, A% a
was age appropriate.
4 I: n, Z: `$ i) FThe family history was remarkable for the father,
3 A$ }# ]% f. }4 U) B' t4 awho was diagnosed with hypothyroidism at age 16,
3 G) x! H/ |" h. b9 ~6 Vwhich was treated with thyroxine. The father’s8 O1 O! D) C, m
height was 6 feet, and he went through a somewhat
3 m3 o9 o4 s/ t eearly puberty and had stopped growing by age 14.! t3 x6 P! @9 ]& i
The father denied taking any other medication. The
6 r9 e4 }% h/ fchild’s mother was in good health. Her menarche# U% @9 K Y: n7 v1 V
was at 11 years of age, and her height was at 5 feet [( V- w# F& |8 ?
5 inches. There was no other family history of pre-5 H' T& V- `) e) N! P, O* p# D
cocious sexual development in the first-degree rela-
+ s8 x" M d8 |6 Xtives. There were no siblings.
' f- p; A6 L/ j* Y! E. b- ePhysical Examination
6 C) I O1 T' A, A5 OThe physical examination revealed a very active,+ Z/ _3 V+ e" y; L9 N- n
playful, and healthy boy. The vital signs documented
2 O" r$ h4 `/ \6 S4 u% k" Ha blood pressure of 85/50 mm Hg, his length was
7 ?: G/ B5 W. y, M* H7 x3 }/ X) U% N90 cm (>97th percentile), and his weight was 14.4 kg: B) Q5 W. P3 J+ E
(also >97th percentile). The observed yearly growth n5 f$ g, K3 Q4 S
velocity was 30 cm (12 inches). The examination of
, N# H, }3 j* T* D$ m! e; s5 Fthe neck revealed no thyroid enlargement./ b: y7 B: p; R1 f T% k+ I/ V
The genitourinary examination was remarkable for1 @0 j0 n# f1 w# |+ z
enlargement of the penis, with a stretched length of
+ K* p( ]) [' z: N1 A" j8 cm and a width of 2 cm. The glans penis was very well- V# c6 `0 u7 a7 C0 @ t
developed. The pubic hair was Tanner II, mostly around
# J3 a, \' v2 @' O( q540
2 d1 D& v% g( d4 J8 `8 F( Zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: I/ q& _5 p3 ]7 rthe base of the phallus and was dark and curled. The; T. S* o$ k' p+ q
testicular volume was prepubertal at 2 mL each.; [9 g$ c& @7 g4 s, h- ~7 \ [
The skin was moist and smooth and somewhat2 v) n1 W7 a1 C5 Y {9 r0 I
oily. No axillary hair was noted. There were no/ e" F; R# C) L, @# L- k
abnormal skin pigmentations or café-au-lait spots.
! G3 O+ l. ?, ~5 {5 TNeurologic evaluation showed deep tendon reflex 2+
$ ?- |1 G! |( s3 obilateral and symmetrical. There was no suggestion+ `% F6 Y/ V. a2 ?: O
of papilledema.- }% s5 b9 i& e# p! M' K h
Laboratory Evaluation
5 L% T& p- t3 L# c. F0 O/ OThe bone age was consistent with 28 months by
4 x7 k% F! M* _* z" v9 l5 uusing the standard of Greulich and Pyle at a chrono-
( o$ L& J/ z- l" y* plogic age of 16 months (advanced).5 Chromosomal
6 M2 V! n4 _9 F. C+ ]* G8 K: ~4 L( okaryotype was 46XY. The thyroid function test1 [) y7 f2 j& Q K
showed a free T4 of 1.69 ng/dL, and thyroid stimu-8 Q- j0 a8 r; s }0 ~7 b5 w% Y [; }
lating hormone level was 1.3 µIU/mL (both normal).
' k' J J' @, ~/ E) ] VThe concentrations of serum electrolytes, blood0 r+ A4 ^1 c9 e, ~
urea nitrogen, creatinine, and calcium all were
. o6 h/ j7 F8 k; c8 }7 \1 swithin normal range for his age. The concentration- {6 V, J6 {& k8 q
of serum 17-hydroxyprogesterone was 16 ng/dL
p: r. I* E1 T& l7 _2 `# W- y F" m(normal, 3 to 90 ng/dL), androstenedione was 20
: `/ O9 E( b( O# T" {ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-1 Z3 w; _2 S0 j2 }1 R' |* Z9 A* x
terone was 38 ng/dL (normal, 50 to 760 ng/dL),6 `) C$ D& A" L( i0 ~
desoxycorticosterone was 4.3 ng/dL (normal, 7 to; b; ~7 y2 A' l0 ~
49ng/dL), 11-desoxycortisol (specific compound S)6 W! T, S% g, o$ C7 c; y
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
# M" P9 r) m, W9 O. l, Ytisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& B8 |- T" T9 n8 D) {. \! T
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),7 X D2 x. p+ t, c- I! V
and β-human chorionic gonadotropin was less than
1 @ e: i6 f! y( p; z% X5 mIU/mL (normal <5 mIU/mL). Serum follicular; Z, B6 P, h% I1 B8 {% k0 L
stimulating hormone and leuteinizing hormone
% t+ E w7 q! o" t7 K# P! n! Y4 D* P- qconcentrations were less than 0.05 mIU/mL& v F& V/ `+ E4 D3 d l
(prepubertal).
' b" N* n' w& RThe parents were notified about the laboratory' b( v; u6 j2 Q- x L, H
results and were informed that all of the tests were s: t3 w/ `: P$ l
normal except the testosterone level was high. The
{! U6 Z1 W% i. H2 }6 xfollow-up visit was arranged within a few weeks to
; _8 O7 V: W0 C" x* E; X/ nobtain testicular and abdominal sonograms; how-8 \+ @7 l: ~' b6 C
ever, the family did not return for 4 months.
- |5 s# m- d/ i" [: M( T* ^! xPhysical examination at this time revealed that the; _2 u3 C/ u& u0 }1 d' h
child had grown 2.5 cm in 4 months and had gained
7 W7 N# X3 B& W$ {2 kg of weight. Physical examination remained
& b+ B% w/ i8 T$ |3 B$ Yunchanged. Surprisingly, the pubic hair almost com-: j- B3 l \+ B$ W3 g
pletely disappeared except for a few vellous hairs at
, Z# \3 w6 j0 I. uthe base of the phallus. Testicular volume was still 2
7 k* {, a2 g* U9 f% SmL, and the size of the penis remained unchanged.
! W4 \ I3 h. h5 p, t3 ZThe mother also said that the boy was no longer hav-- h( v7 s* s( z7 B9 G0 F4 Z# C* b" d
ing frequent erections.1 O a+ J9 c" B$ I
Both parents were again questioned about use of
: F F& `* ]( o. t- L7 rany ointment/creams that they may have applied to' q" @( \( W6 B. j) M4 ]" o7 G
the child’s skin. This time the father admitted the" _' M6 f2 |4 s, O, |" C
Topical Testosterone Exposure / Bhowmick et al 541' m' y: k# W+ _$ m5 P$ Q* E4 f1 x" a
use of testosterone gel twice daily that he was apply-8 @- S+ f! f/ c+ c
ing over his own shoulders, chest, and back area for+ p. q3 @2 d" ?& Q2 j
a year. The father also revealed he was embarrassed
: u5 j C$ m1 oto disclose that he was using a testosterone gel pre-; v6 u3 f, E1 ^9 @7 `
scribed by his family physician for decreased libido& n% h- C* y# ^* m$ W: C
secondary to depression.
8 m8 a; i- z) k5 l1 JThe child slept in the same bed with parents.
: }7 ~' E2 d# L4 v' YThe father would hug the baby and hold him on his- c/ @5 f* f0 V& i
chest for a considerable period of time, causing sig-
- e/ V" u# C+ Z# l& Xnificant bare skin contact between baby and father.7 C- N* M# U0 z) I$ i
The father also admitted that after the phone call,
1 I% |6 |& G9 [# V! i' Mwhen he learned the testosterone level in the baby( E, I5 @" B, u$ t( X' Z
was high, he then read the product information- D6 ~' [" @ O' Q. t
packet and concluded that it was most likely the rea-1 S$ G( \' p/ z2 L- N. V; w
son for the child’s virilization. At that time, they. t" ~" G# s4 C. }
decided to put the baby in a separate bed, and the
! l5 \0 Y: z1 n& q2 p0 t# l% @: U7 {father was not hugging him with bare skin and had
$ E: h* E8 `0 Q2 zbeen using protective clothing. A repeat testosterone
: w; L( d0 `# htest was ordered, but the family did not go to the
+ L/ ]- _3 C5 L; H+ u' ~6 ?6 P3 Llaboratory to obtain the test.
5 D4 D* ^* {+ n h# F8 JDiscussion
/ r. X" @8 T8 b# Z' y7 HPrecocious puberty in boys is defined as secondary9 f- ^" G# w: N' t) e
sexual development before 9 years of age.1,4
7 ~/ F' ^$ }1 K) c) `Precocious puberty is termed as central (true) when
( T" F: j/ c7 o% {it is caused by the premature activation of hypo-
& y3 ~" u5 m0 v1 K' ~) Zthalamic pituitary gonadal axis. CPP is more com-- L& p/ j0 W4 n* W
mon in girls than in boys.1,3 Most boys with CPP" ]8 s/ \! g1 s/ ^
may have a central nervous system lesion that is
7 D# W. g$ ^" kresponsible for the early activation of the hypothal- J* I! i# b7 Y
amic pituitary gonadal axis.1-3 Thus, greater empha-
6 r! v- {8 D+ j$ i, J* H' nsis has been given to neuroradiologic imaging in
! H8 `2 I6 A0 s5 O; ]1 t! Bboys with precocious puberty. In addition to viril-" G" ?* {9 c( Q: j+ z: V( O
ization, the clinical hallmark of CPP is the symmet-
`9 G$ m* P. T8 s6 |( urical testicular growth secondary to stimulation by
+ m" u0 @8 Q! J' _9 v3 rgonadotropins.1,3' \1 l/ e' ^5 ^5 A% u
Gonadotropin-independent peripheral preco-
0 Z* G- G8 ~" L! p- X7 [8 F; d+ zcious puberty in boys also results from inappropriate5 e0 j/ {3 f% M H4 y% a; `5 X) [/ f
androgenic stimulation from either endogenous or2 {: W5 L9 Z5 ^+ Q
exogenous sources, nonpituitary gonadotropin stim-: P6 w( z; E% \& g
ulation, and rare activating mutations.3 Virilizing
* K: d& N2 N# h4 R" M5 Z2 x9 {+ wcongenital adrenal hyperplasia producing excessive
1 T/ f5 g+ O( P$ A0 P5 Q& N, W: h, ^adrenal androgens is a common cause of precocious
, [+ Q* \+ x( i/ Upuberty in boys.3,4
. ^* ~- \+ V' s* g! ~4 g0 ^The most common form of congenital adrenal/ E7 b+ X( o' g* u2 p ~. }
hyperplasia is the 21-hydroxylase enzyme deficiency.; ?6 v v5 ]1 d) y# \" I
The 11-β hydroxylase deficiency may also result in, _* f" F; e. P% Y( i
excessive adrenal androgen production, and rarely,
! Z) v$ ]# v6 u7 |an adrenal tumor may also cause adrenal androgen5 z" t# T4 C$ f, t
excess.1,3; v4 W/ ]' ?4 Y6 L, M% N4 s
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" g- t1 O' p/ {# Q
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
j+ R1 P- a- H0 G9 D' z* J9 N$ sA unique entity of male-limited gonadotropin-
" Y% [8 z! R6 D! R# {5 ^+ Windependent precocious puberty, which is also known' |( K2 r2 U; C# I9 n
as testotoxicosis, may cause precocious puberty at a" j8 x) A# P! x
very young age. The physical findings in these boys
% w8 H, C8 l4 x+ ywith this disorder are full pubertal development, Z. Y) L5 E0 T; E2 M4 e! C( @
including bilateral testicular growth, similar to boys0 l, h" b3 @+ K) T/ w; c+ e) h
with CPP. The gonadotropin levels in this disorder
0 D: k# J q4 e4 F A& l8 u$ Kare suppressed to prepubertal levels and do not show
% |* {# Y4 g) f- \' j; dpubertal response of gonadotropin after gonadotropin-
- p% K! B3 ]! I$ r# X: Ereleasing hormone stimulation. This is a sex-linked9 `* R) _2 h6 c" x9 O
autosomal dominant disorder that affects only
9 F4 ^( W5 L$ e. cmales; therefore, other male members of the family) s; a, w" L9 ]% x1 ^# \
may have similar precocious puberty.3) X. g/ E2 Y: T' \
In our patient, physical examination was incon-
/ t' ^, E* M# ?sistent with true precocious puberty since his testi-
% z" U& Q( D$ O5 s+ l' hcles were prepubertal in size. However, testotoxicosis
2 E( t9 O7 z6 d8 l, Z5 S" e' kwas in the differential diagnosis because his father# Q8 z9 I% t: F K# T5 [
started puberty somewhat early, and occasionally,
( O1 n ?: Y: m* V6 j4 S Ytesticular enlargement is not that evident in the
( D% s. O1 G5 X, J! ?2 Z2 z" C' w: Xbeginning of this process.1 In the absence of a neg-& ~5 F) W8 w0 u- {
ative initial history of androgen exposure, our9 w$ U& q' }7 B# `; L
biggest concern was virilizing adrenal hyperplasia,+ ? z6 [& Y1 r T! T3 y8 E, K- I8 T
either 21-hydroxylase deficiency or 11-β hydroxylase0 g( \( k* x' ~$ |+ M1 g
deficiency. Those diagnoses were excluded by find-
& E0 @ l. G& P9 Wing the normal level of adrenal steroids.
1 P) h$ j, q3 g F. XThe diagnosis of exogenous androgens was strongly
. g; K" P; l P" Z# x l6 X' Ysuspected in a follow-up visit after 4 months because
) f% Q" G$ [0 U0 z3 ^8 ethe physical examination revealed the complete disap-6 @ w3 C: \0 ?; o) \( D) j5 s: x
pearance of pubic hair, normal growth velocity, and/ V' i3 [+ \9 U
decreased erections. The father admitted using a testos-
; ~+ W. Y z) ? _3 Q! o" Pterone gel, which he concealed at first visit. He was" {/ P# {: v' Y9 T4 Q8 L: u3 t/ S
using it rather frequently, twice a day. The Physicians’
- P; q- E- |7 V' g. r3 NDesk Reference, or package insert of this product, gel or7 }9 q7 T9 r2 i
cream, cautions about dermal testosterone transfer to
% f' r& ^% s2 |! h+ C& t- Bunprotected females through direct skin exposure.
a6 X8 U6 d* x% c- i% PSerum testosterone level was found to be 2 times the! H" A$ [+ r$ X6 d" }8 P! m9 h
baseline value in those females who were exposed to
* Y8 S, W: ~8 o) l; ]even 15 minutes of direct skin contact with their male
% K3 v) ?' a4 M0 `0 ^partners.6 However, when a shirt covered the applica-
; E# S# R) b' N3 Ntion site, this testosterone transfer was prevented.$ F' F! F7 Q& K7 V9 T( _' A
Our patient’s testosterone level was 60 ng/mL,
: ] }. Y2 f; Zwhich was clearly high. Some studies suggest that& N# ]5 g; y* |- [
dermal conversion of testosterone to dihydrotestos-0 |* z1 F5 c9 Q) d9 s
terone, which is a more potent metabolite, is more8 O0 I- E5 d) X. m9 S7 j
active in young children exposed to testosterone" B, U" i n, S- P$ L h$ n6 p+ P- N
exogenously7; however, we did not measure a dihy-; m! [2 y. x. m, g1 z
drotestosterone level in our patient. In addition to
! b9 x; o7 ~4 I, S% }- rvirilization, exposure to exogenous testosterone in5 h' r! d E/ ]$ B2 Z
children results in an increase in growth velocity and" D) I" C' p8 b: Q4 W! y
advanced bone age, as seen in our patient.
6 i( A/ e! ]7 Q! L' ^0 {3 c& I7 H) ?7 ?The long-term effect of androgen exposure during R5 B8 B4 R6 K, H
early childhood on pubertal development and final
$ J4 \" @# Q8 hadult height are not fully known and always remain
8 `+ [8 P- b+ p( ?6 n( La concern. Children treated with short-term testos-
- H- V% {! C$ q7 V9 j: Vterone injection or topical androgen may exhibit some
# o" p; @! J3 ^( r& O) O- [# W% xacceleration of the skeletal maturation; however, after
7 ?7 B W% i8 m! Gcessation of treatment, the rate of bone maturation7 ]$ W- [8 ]3 [3 O7 E
decelerates and gradually returns to normal.8,9
) c4 Z" c+ V$ Z9 [6 F2 SThere are conflicting reports and controversy
5 h I6 } B. a* E9 d7 ]: Jover the effect of early androgen exposure on adult
q7 v5 O4 I0 |+ s H8 ^& cpenile length.10,11 Some reports suggest subnormal
- l+ N0 z1 D. D E, t8 fadult penile length, apparently because of downreg-: A: c; l9 N2 V/ \6 V
ulation of androgen receptor number.10,12 However,
( Z7 z8 r4 G6 @Sutherland et al13 did not find a correlation between
; g( ]3 i1 K/ o2 Pchildhood testosterone exposure and reduced adult# I+ w6 s' A$ N0 F7 s6 I: D. K
penile length in clinical studies.; c: h5 [* n+ V, G0 Q2 p8 O
Nonetheless, we do not believe our patient is' k F" T( P+ G
going to experience any of the untoward effects from7 b8 T' T: a1 d0 g- y W
testosterone exposure as mentioned earlier because `# W+ W Z) i" M( t% o5 R2 u
the exposure was not for a prolonged period of time.
6 p& Q" j$ e* V' ]2 @Although the bone age was advanced at the time of" Z/ R( g- X6 j
diagnosis, the child had a normal growth velocity at
P8 M8 K% h. Z4 O# B# Z) Y8 zthe follow-up visit. It is hoped that his final adult
: {# y, V: J4 Theight will not be affected.
! }7 [9 C, I& L2 [/ F) MAlthough rarely reported, the widespread avail-4 N6 Y5 J( C# [7 E
ability of androgen products in our society may
, g5 x2 O7 q! Aindeed cause more virilization in male or female
6 n5 o/ p2 v! i# ?children than one would realize. Exposure to andro-
2 O9 Q. v. u7 C1 c* Wgen products must be considered and specific ques-2 R$ ^ {, b' M7 l8 p/ d6 l
tioning about the use of a testosterone product or, C+ Y- H2 r$ n0 Y; p" U' _
gel should be asked of the family members during1 g: G# ~' _. u. O. j6 b
the evaluation of any children who present with vir-
3 ]; b/ }& @3 s. Ailization or peripheral precocious puberty. The diag-
- V( @& i/ M; B/ |2 y. M' Anosis can be established by just a few tests and by
; Z: p1 K z/ c3 J$ xappropriate history. The inability to obtain such a N% \/ w3 d0 A$ g* @
history, or failure to ask the specific questions, may
$ u+ v# A9 d$ U% M/ i- Yresult in extensive, unnecessary, and expensive
9 n0 O+ {' Z6 y }* t6 vinvestigation. The primary care physician should be
0 `& M( q# ~ S! X9 F% Oaware of this fact, because most of these children# L/ m* e! z! n1 |$ ~$ C: q
may initially present in their practice. The Physicians’
0 R3 j, ~" W' S. q* rDesk Reference and package insert should also put a: ~* ^& R& k: A% S0 v6 c
warning about the virilizing effect on a male or
& g& k0 n$ A& |2 {; x" x/ Dfemale child who might come in contact with some-' N- b# B' l# c: M$ `+ N
one using any of these products.& P% x1 n- P# F0 t+ u
References
0 \ i3 {; F$ _* P' d' E1. Styne DM. The testes: disorder of sexual differentiation& w' w7 q% X* {4 t2 `2 z2 e s
and puberty in the male. In: Sperling MA, ed. Pediatric
' C! Q$ e) k: ^, oEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
' A9 _5 w/ y) p* V2002: 565-628.) ~. ^9 a5 r6 c |
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious7 A. f+ \9 g5 g8 N% o( Z
puberty in children with tumours of the suprasellar pineal |
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