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Sexual Precocity in a 16-Month-Old8 j" S8 m \+ A- |9 n5 c- M
Boy Induced by Indirect Topical
# Y" b- b$ S% N4 ^* IExposure to Testosterone4 y( C, @3 H5 R% d
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
# e6 U L1 O' o. K& p0 wand Kenneth R. Rettig, MD1
0 p# q3 m: x/ ]Clinical Pediatrics
( F g) E3 S7 T8 a8 a* mVolume 46 Number 6+ k4 i$ R, j& n j: S
July 2007 540-5434 P8 g. M0 }' B: `9 ?2 f r1 [
© 2007 Sage Publications* T9 {/ y. O) S8 v. q
10.1177/0009922806296651% Y0 z) B2 q# V& [
http://clp.sagepub.com- `/ H& \4 m$ U# p7 r4 V
hosted at
0 m" H3 D! a' P! Y' a6 A( w4 uhttp://online.sagepub.com9 V7 E% [ b. _: X4 z# B5 n
Precocious puberty in boys, central or peripheral,
$ U3 M9 p s' v7 z" s$ O# lis a significant concern for physicians. Central; u6 `, @7 E9 c* _
precocious puberty (CPP), which is mediated1 B1 `0 [4 e& y, ]; k1 B
through the hypothalamic pituitary gonadal axis, has
& ]( G5 ~ Z# p! Ka higher incidence of organic central nervous system
2 x" Q0 X( k( h. ylesions in boys.1,2 Virilization in boys, as manifested
+ h# I- o" J9 K+ `2 Y4 w: i! A: wby enlargement of the penis, development of pubic- e- f' g- I, P# @8 h" B1 m
hair, and facial acne without enlargement of testi-8 x/ o) \+ k/ z
cles, suggests peripheral or pseudopuberty.1-3 We4 N2 x! ^" ?2 e( @" V4 h: @
report a 16-month-old boy who presented with the
g" |" C% m- }* o" m6 W6 l/ @# fenlargement of the phallus and pubic hair develop-% k6 \ ?- S V) p2 d! E+ r: D
ment without testicular enlargement, which was due7 @/ U- R# [+ Q5 q! ~
to the unintentional exposure to androgen gel used by
1 O% _- Z5 e' ]. q- U3 u$ sthe father. The family initially concealed this infor-! M3 i* Y; n) j' G6 C
mation, resulting in an extensive work-up for this
- k" c R* [7 T, |1 u% }. dchild. Given the widespread and easy availability of
% ~6 g0 W; w4 c- L [6 G, Etestosterone gel and cream, we believe this is proba-
; g- p- \( [5 N" D) [; a% I6 Q+ k/ Bbly more common than the rare case report in the
% I6 i1 L/ f; x% Y2 z1 lliterature.4
* J) E+ ^6 b: KPatient Report
, q8 B) n6 t: t: ]9 gA 16-month-old white child was referred to the
, I1 Z% a7 ?$ Z. @ Uendocrine clinic by his pediatrician with the concern
+ m$ E0 k+ d" qof early sexual development. His mother noticed
8 X' w2 u6 u6 k ?/ H# ^light colored pubic hair development when he was
7 I* i: z) v- N& g/ }From the 1Division of Pediatric Endocrinology, 2University of
( p/ U: U/ Z7 H* }; g& YSouth Alabama Medical Center, Mobile, Alabama.
9 A4 D( u; y/ o$ I2 HAddress correspondence to: Samar K. Bhowmick, MD, FACE,
" \# _( G9 J- c( n$ ~Professor of Pediatrics, University of South Alabama, College of. V9 A$ h O& t, X* {4 e
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
2 L1 C% t3 w9 {2 Ae-mail: [email protected].% K' d' R2 }0 Q7 q% z
about 6 to 7 months old, which progressively became
' e* P/ c$ [% I$ Q( a( ]) ^darker. She was also concerned about the enlarge-' m+ k h2 p0 U% @# s! A
ment of his penis and frequent erections. The child
@! d Z9 ]! P: [; x% cwas the product of a full-term normal delivery, with8 `% @8 G8 m9 A6 d. a
a birth weight of 7 lb 14 oz, and birth length of
% O9 B3 }6 @6 t& k4 m& s# R20 inches. He was breast-fed throughout the first year0 h6 \/ I0 m: {" X
of life and was still receiving breast milk along with; ]# r/ K- \1 e) T
solid food. He had no hospitalizations or surgery,# ~( s V/ J1 m
and his psychosocial and psychomotor development
0 j P# J% a8 f3 A' x. rwas age appropriate.( s* `7 G% ~1 _4 A Y
The family history was remarkable for the father,* K( [/ z$ z' l2 j2 n4 {
who was diagnosed with hypothyroidism at age 16,
: a1 j) i) H; _' S+ n- ?which was treated with thyroxine. The father’s
' f' J5 ^3 p6 d! vheight was 6 feet, and he went through a somewhat( S0 I/ \7 v0 G! O( E4 W/ f
early puberty and had stopped growing by age 14.
8 A- |3 c6 F: G/ V0 RThe father denied taking any other medication. The& x6 M! N- ]3 F7 [
child’s mother was in good health. Her menarche7 }8 U& u8 N; q8 R
was at 11 years of age, and her height was at 5 feet
! e( b K8 m/ m5 inches. There was no other family history of pre-
( E! s R3 x4 c3 `' b+ W+ w3 Xcocious sexual development in the first-degree rela-
7 u3 ^* z% L ?- y: Stives. There were no siblings.: v- v `- u7 W4 @, M3 z4 P, L. `0 t
Physical Examination! N3 x7 A9 N/ X
The physical examination revealed a very active,
3 ^5 `1 F$ s/ G7 u" p' J& Bplayful, and healthy boy. The vital signs documented0 k) F8 N4 s e- w
a blood pressure of 85/50 mm Hg, his length was. P4 Q {+ U# `1 q
90 cm (>97th percentile), and his weight was 14.4 kg
4 g% \. [! D% n! }' U2 f(also >97th percentile). The observed yearly growth, J& B3 c, M# I- y, G
velocity was 30 cm (12 inches). The examination of: {6 q9 S0 a, V( ~! ]" l$ h0 H
the neck revealed no thyroid enlargement.0 A: G% _2 n9 p4 R8 b. K9 D
The genitourinary examination was remarkable for0 s6 D9 K# q- b6 l6 d [9 e6 k2 E
enlargement of the penis, with a stretched length of* |# e! P' n$ r }; O
8 cm and a width of 2 cm. The glans penis was very well
2 D% |" T% K0 y3 Hdeveloped. The pubic hair was Tanner II, mostly around
* ]" ?# e- ]: T1 p( l5409 m, g6 P, }+ W- X p8 [ f* O Z* r. x
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) y6 R$ P1 W/ P3 r2 w& H' c' {
the base of the phallus and was dark and curled. The8 w9 J; ~9 X8 G% _9 C& S( b
testicular volume was prepubertal at 2 mL each.
. o* F9 ?) V+ \, o9 YThe skin was moist and smooth and somewhat- q0 n1 x: u1 H, h. o
oily. No axillary hair was noted. There were no2 \5 W |0 \8 y X2 o7 U5 I% B
abnormal skin pigmentations or café-au-lait spots.! y# ^6 z' k& d
Neurologic evaluation showed deep tendon reflex 2+* \0 X7 u, R7 w/ Z2 Y @8 m( Z5 X
bilateral and symmetrical. There was no suggestion, ?% g2 m6 d8 p
of papilledema.; D; z2 l. n! Y9 a* p1 {
Laboratory Evaluation5 g( L" M3 C7 G( l: e: n# Z# {
The bone age was consistent with 28 months by e7 R9 `7 ^+ p
using the standard of Greulich and Pyle at a chrono-
" ], e4 }. E, hlogic age of 16 months (advanced).5 Chromosomal
6 q3 g, G! R- J" q% Q" q6 @9 x; Vkaryotype was 46XY. The thyroid function test
+ B9 x- _ ^/ w) }/ ?* ^showed a free T4 of 1.69 ng/dL, and thyroid stimu-
: r( J; f. f% _. K/ r' y. ~lating hormone level was 1.3 µIU/mL (both normal).1 r+ Y0 `% v' B
The concentrations of serum electrolytes, blood
. x' f# l" ] c$ t% Purea nitrogen, creatinine, and calcium all were
( z5 A+ M5 q/ m+ l3 n# awithin normal range for his age. The concentration" ?; b& y6 Z3 f4 s5 K
of serum 17-hydroxyprogesterone was 16 ng/dL
! \0 e; G: W* c(normal, 3 to 90 ng/dL), androstenedione was 20
! x9 n2 v! g5 ~9 A2 wng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
3 B) w, J8 ~' q) w- v& d9 [3 Qterone was 38 ng/dL (normal, 50 to 760 ng/dL),% n% W! Y' I3 Q- c- T* G+ ~# M
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
5 p2 A$ ?7 S/ E; S h& Z) j49ng/dL), 11-desoxycortisol (specific compound S)
$ m& R D, e3 {; A6 X1 k+ awas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-4 |4 U! c0 g* _
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 s5 E8 G& U Ftestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
, ~& d/ y0 ~3 w; m2 }+ m; ?% Iand β-human chorionic gonadotropin was less than& B' g( d4 v! i+ s2 s
5 mIU/mL (normal <5 mIU/mL). Serum follicular
- I+ \9 }0 k4 [$ S) y1 o# L7 |stimulating hormone and leuteinizing hormone: P: ?( S/ n7 o: P
concentrations were less than 0.05 mIU/mL
: A' n1 B1 z( Q5 U( A(prepubertal).. Q8 b5 c; l) M. ` ~. X
The parents were notified about the laboratory
2 M. W& h/ [9 l& K: q% n& ?- z+ nresults and were informed that all of the tests were1 m8 z" k* b0 M8 s( E3 r# S8 x& j
normal except the testosterone level was high. The
7 W* w( k; C) Z, c* j! ?: `9 dfollow-up visit was arranged within a few weeks to
4 u+ x( d( ]% {5 J& t3 L9 `obtain testicular and abdominal sonograms; how-& j! u9 i- M; M( c
ever, the family did not return for 4 months.
$ W- F5 n5 f' {9 w! l/ B! {) O# y. aPhysical examination at this time revealed that the
; m/ g, n, N! l/ Ychild had grown 2.5 cm in 4 months and had gained
# k# n% r% ^( L) X% P( S% O9 N# |' ?9 J3 V2 kg of weight. Physical examination remained
' _* ]( Y- v+ y t0 v7 x( C. d/ _unchanged. Surprisingly, the pubic hair almost com-
8 v$ v7 e; M3 J& M6 Q* P8 opletely disappeared except for a few vellous hairs at. v0 Z0 Y* B y3 H
the base of the phallus. Testicular volume was still 2" O. Y) L5 [- a5 u) t: D1 @0 v
mL, and the size of the penis remained unchanged.$ |. C, l* b$ O5 T
The mother also said that the boy was no longer hav-
" u4 A6 p3 ~# y7 K4 c. ~& Ling frequent erections.3 ]8 e1 F2 w0 r% R
Both parents were again questioned about use of
5 w! S$ k3 E, f2 dany ointment/creams that they may have applied to
4 Z' G8 W2 f; D" {! g Rthe child’s skin. This time the father admitted the
. \# P4 L, f6 ^Topical Testosterone Exposure / Bhowmick et al 541
+ F) f a8 y% ~. ~8 ruse of testosterone gel twice daily that he was apply-
, h8 D% K! [3 Z) V7 `- v& i9 Bing over his own shoulders, chest, and back area for, h" f. ?1 K/ e, }7 @
a year. The father also revealed he was embarrassed
: \# K } u. l y8 Qto disclose that he was using a testosterone gel pre-
: ?6 A8 m: w. p# V6 sscribed by his family physician for decreased libido% y% ~5 |4 b" V2 f% ~6 h( R
secondary to depression.% J8 M+ B. Q3 v- C
The child slept in the same bed with parents.
( B N& }$ J! ^! ], L7 {The father would hug the baby and hold him on his
( G& u! x4 z l! ?' V, i0 A# L, B* dchest for a considerable period of time, causing sig-
; l. K+ u* i, x2 Pnificant bare skin contact between baby and father.
# X1 C5 g" g: i9 F/ FThe father also admitted that after the phone call,: A$ ~, n- D# V' W& L, Q1 k
when he learned the testosterone level in the baby
' n6 Q% X) i( c6 C# Y0 Nwas high, he then read the product information4 \7 q/ K9 U, p C" l
packet and concluded that it was most likely the rea-
6 C+ [: _+ j' Z M/ i6 B- K: |son for the child’s virilization. At that time, they- }8 \. e/ J* I4 b* I" X
decided to put the baby in a separate bed, and the) t: d! K4 V" c4 ~" X
father was not hugging him with bare skin and had
' w1 u# d% X+ @& a/ Y- U/ Abeen using protective clothing. A repeat testosterone% x* c% a8 O7 b& E) C- Z: i
test was ordered, but the family did not go to the& D$ L- L& \1 n
laboratory to obtain the test.! H- @3 E3 W1 w/ F n
Discussion
' {9 s# p& u, HPrecocious puberty in boys is defined as secondary
4 H1 k2 ?9 b- S! e# A( L+ x: Nsexual development before 9 years of age.1,4
& T! ?3 y) }4 r c1 GPrecocious puberty is termed as central (true) when
* x/ n( d8 x {! pit is caused by the premature activation of hypo-" w2 x! V, }8 I; \; W
thalamic pituitary gonadal axis. CPP is more com-
* E- j$ @ b, g8 P# F R: B& mmon in girls than in boys.1,3 Most boys with CPP5 Y: b, ]1 M3 s. T5 l
may have a central nervous system lesion that is
: _1 K* d. }+ P4 H( Z9 u7 b1 Iresponsible for the early activation of the hypothal-
+ `& ^ R8 D% Xamic pituitary gonadal axis.1-3 Thus, greater empha-
1 c7 Z' y- Y8 rsis has been given to neuroradiologic imaging in- ^$ A) a6 l, [/ r- q, C0 j
boys with precocious puberty. In addition to viril-' J, r8 e; N% \5 S
ization, the clinical hallmark of CPP is the symmet-
9 H9 U, f6 i9 o$ @rical testicular growth secondary to stimulation by2 r6 j& ~4 D4 r- v5 L7 g
gonadotropins.1,3
8 v8 U: B2 M- Y. wGonadotropin-independent peripheral preco-
, D, f, j1 h. U& Zcious puberty in boys also results from inappropriate
# b# X! C- Q/ s. T; @9 g. G# zandrogenic stimulation from either endogenous or
# P U' `, D' ?exogenous sources, nonpituitary gonadotropin stim-
z2 O: W% C( H; G5 p9 L2 c7 Yulation, and rare activating mutations.3 Virilizing( x* g( H1 ?1 A4 h
congenital adrenal hyperplasia producing excessive
; d, X, N) N8 w% _ p+ ~adrenal androgens is a common cause of precocious' @3 W- c9 P& N( l5 A: C' d! c' g
puberty in boys.3,4
% L, q0 ]9 [: U* qThe most common form of congenital adrenal; R" U( V# q3 h7 y; s0 B, ^# n
hyperplasia is the 21-hydroxylase enzyme deficiency.8 r$ Z9 Y8 R# u! Y, O& X- l
The 11-β hydroxylase deficiency may also result in
0 ~! {" T }" j {/ xexcessive adrenal androgen production, and rarely,3 {0 O! b6 t5 }6 w3 p" W; G
an adrenal tumor may also cause adrenal androgen j3 |5 k8 g1 M$ L5 o! d( I; s/ V
excess.1,3' Q$ T" ~# A' G( G$ ~
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from/ d; y I# l* ]0 @$ N& L8 @5 U
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
b8 @& I e6 o' `: J! I# hA unique entity of male-limited gonadotropin-
0 ]5 n" m% p) P, m3 pindependent precocious puberty, which is also known
& X2 K9 I# b9 l% O1 }, qas testotoxicosis, may cause precocious puberty at a
5 w+ g& e3 r) ~& ~" G: W$ lvery young age. The physical findings in these boys
; n P' A4 u z: x* ^' Zwith this disorder are full pubertal development,0 w' W$ E, ]+ b2 {6 c: C8 z X
including bilateral testicular growth, similar to boys
3 W* Q. A1 A/ G5 l5 ?3 n/ g8 @. mwith CPP. The gonadotropin levels in this disorder& E2 M# \) _( J6 z. u! Z: V
are suppressed to prepubertal levels and do not show: _' |; B1 [1 ]- f/ a$ J7 L7 N
pubertal response of gonadotropin after gonadotropin-9 E. j) A% v& p8 N9 |
releasing hormone stimulation. This is a sex-linked0 Y' F0 g1 Y* b" m6 d
autosomal dominant disorder that affects only2 c: R8 G* \ b' q
males; therefore, other male members of the family
$ v5 [/ z. K! x. f- V1 B; Xmay have similar precocious puberty.3
- }4 S6 v- Z1 u% ]3 w7 qIn our patient, physical examination was incon-
9 x) l. e+ o2 y( ~. Xsistent with true precocious puberty since his testi-: ~" s% G- j- k( P( Q2 `
cles were prepubertal in size. However, testotoxicosis; v- P; y4 w7 b2 Q2 t' }; c
was in the differential diagnosis because his father
/ S8 F9 j4 O$ Istarted puberty somewhat early, and occasionally,3 g' Q2 h( p4 V4 h0 S( u \2 b9 N
testicular enlargement is not that evident in the
7 j3 b4 x# r$ l+ N, K/ lbeginning of this process.1 In the absence of a neg-1 r/ \* C# K F$ {* u
ative initial history of androgen exposure, our
3 Y$ U T4 n! T, x4 G% x, r, qbiggest concern was virilizing adrenal hyperplasia,5 e, O; e% E& {3 K1 w
either 21-hydroxylase deficiency or 11-β hydroxylase
0 I$ I& t1 E* [5 Ldeficiency. Those diagnoses were excluded by find-
) R3 r3 n6 M% Z5 B( Z1 ming the normal level of adrenal steroids.8 c/ \% H6 u2 S/ t0 {2 U* r
The diagnosis of exogenous androgens was strongly0 u. O) j+ T8 ~1 z# ^+ f
suspected in a follow-up visit after 4 months because- _. j) |4 a( K1 ]) \
the physical examination revealed the complete disap- `' e- @" S! r1 {# k
pearance of pubic hair, normal growth velocity, and
3 i# \7 n5 G/ K2 Bdecreased erections. The father admitted using a testos-) b5 F7 `" w7 m: \0 m
terone gel, which he concealed at first visit. He was
5 x; W+ j: X5 S% P& ?0 m; wusing it rather frequently, twice a day. The Physicians’
9 c( t1 r, Q1 l+ ~2 `- vDesk Reference, or package insert of this product, gel or
' C5 p3 W z$ o2 N' o7 h& `cream, cautions about dermal testosterone transfer to
8 G( I3 k2 ?, ^unprotected females through direct skin exposure.% S& S( W$ R7 G
Serum testosterone level was found to be 2 times the( x1 i( K2 {: J; E5 M& }4 z
baseline value in those females who were exposed to# {3 S& C+ V$ [% a0 a0 j
even 15 minutes of direct skin contact with their male8 S0 I3 s) [& z& i* J
partners.6 However, when a shirt covered the applica-* \( X2 P+ V& g' w" P: S# e
tion site, this testosterone transfer was prevented.
2 A$ u- E9 L) ` @+ Q {- t: \) mOur patient’s testosterone level was 60 ng/mL,4 A& S. ~& |% o: Q7 j: q
which was clearly high. Some studies suggest that
* o6 }: ~8 n' Y! @' edermal conversion of testosterone to dihydrotestos-+ [$ g& Z# |6 T7 _0 @( m- W
terone, which is a more potent metabolite, is more" u1 Z* _$ U0 I6 I
active in young children exposed to testosterone
+ y( u6 B7 C! aexogenously7; however, we did not measure a dihy-5 V/ Q1 w4 |3 l& D1 P) W0 ]- `9 A
drotestosterone level in our patient. In addition to
# g9 P% |' e9 c L* fvirilization, exposure to exogenous testosterone in
, i7 j7 |' i: qchildren results in an increase in growth velocity and
' g5 \1 i% n* Z5 F. U9 R* fadvanced bone age, as seen in our patient.
0 S: ?& M B! r( Z3 QThe long-term effect of androgen exposure during
6 `, Q8 l# U; ^" ~; L# W7 K6 nearly childhood on pubertal development and final2 u: K7 k0 t7 K6 n1 z
adult height are not fully known and always remain* N: y* K. U7 d6 C& p
a concern. Children treated with short-term testos-
8 U8 k y2 y$ I$ fterone injection or topical androgen may exhibit some) K: Y! W- c8 ?& i6 @
acceleration of the skeletal maturation; however, after
! X0 N" }% _$ ]8 B7 wcessation of treatment, the rate of bone maturation0 [' v/ \/ C: W4 ^' u
decelerates and gradually returns to normal.8,9
2 q6 b7 s. Q7 G! n1 GThere are conflicting reports and controversy4 j/ n1 Q7 e" H3 R: c
over the effect of early androgen exposure on adult6 U* p! C4 {6 |6 q
penile length.10,11 Some reports suggest subnormal8 z V9 |! |5 g. c% l" ^
adult penile length, apparently because of downreg-7 h- e% D8 @$ o+ F# z8 G) Q, K
ulation of androgen receptor number.10,12 However,% b1 j* k' v& L& Y
Sutherland et al13 did not find a correlation between# b1 ~' r" B1 L; z0 E( M2 D
childhood testosterone exposure and reduced adult- O8 m( R2 [2 ?
penile length in clinical studies.
+ P$ k3 }5 k+ ~+ l: y0 q9 Z mNonetheless, we do not believe our patient is
' Z- Z0 {' P+ }going to experience any of the untoward effects from3 J# Z5 T! F; W$ S. {7 L' { k
testosterone exposure as mentioned earlier because, s( {9 m4 L0 q4 [" @& f* b1 e3 S
the exposure was not for a prolonged period of time.9 N" g+ V- E* e/ j- A
Although the bone age was advanced at the time of" Y: F K, A c' v5 o
diagnosis, the child had a normal growth velocity at* z$ k, q1 |8 _! U9 t
the follow-up visit. It is hoped that his final adult0 C$ G. _! Q/ K* `5 G p
height will not be affected.
) J* T5 T P" t3 w6 L0 q% LAlthough rarely reported, the widespread avail-
" t. s- a% m$ |ability of androgen products in our society may2 J1 \& s( A6 c7 |
indeed cause more virilization in male or female3 G8 G* }' p; I# ^ T/ M8 e% e( F
children than one would realize. Exposure to andro-
* ~' J/ }# g; D6 r' \/ lgen products must be considered and specific ques-
& c" R' |7 I) ~/ p/ {3 C V# Btioning about the use of a testosterone product or
& E7 [( [: D( _gel should be asked of the family members during2 |( U4 d' _; ~+ n8 Y
the evaluation of any children who present with vir-& B( e( e4 ~! E( I& S
ilization or peripheral precocious puberty. The diag-
2 @, d& U, X2 t8 M/ snosis can be established by just a few tests and by I7 l* g7 M/ W X- |, z
appropriate history. The inability to obtain such a8 p+ Y# R a: Q6 j% e7 g4 m
history, or failure to ask the specific questions, may: v2 X1 ~% ?$ O2 _# O+ f! H
result in extensive, unnecessary, and expensive
0 [* m- o) q6 c- tinvestigation. The primary care physician should be5 r- f7 V# j' w, ]* n2 f4 J
aware of this fact, because most of these children
8 d6 F( B0 I- N9 V6 f Pmay initially present in their practice. The Physicians’% u6 @, [7 a3 M. [7 s1 e
Desk Reference and package insert should also put a
3 Y' Z1 ?3 O- J/ bwarning about the virilizing effect on a male or
3 q* }; d, I, F6 w. f& z# R! r( Rfemale child who might come in contact with some-- x* A8 m/ U, n) P3 s( f
one using any of these products.$ l% q$ `" V R6 h t
References6 _5 G) Z1 I) b, I9 D
1. Styne DM. The testes: disorder of sexual differentiation
/ ^4 e C3 V; O, j ?) A( eand puberty in the male. In: Sperling MA, ed. Pediatric
' A$ Y' L* D; qEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;& W! o4 S _ M0 p1 I
2002: 565-628.1 j# {+ |6 f- u$ s# K2 y" u
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious4 R6 A( T* F/ X; O4 d% E; G
puberty in children with tumours of the suprasellar pineal |
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