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Sexual Precocity in a 16-Month-Old
7 {; i+ R% I7 |4 V2 FBoy Induced by Indirect Topical! w2 F( a+ }7 D; q
Exposure to Testosterone; e' M+ x6 Q) j3 r$ m: C( v% k
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2
( l9 ]& a- A, _& m8 `2 _( x: uand Kenneth R. Rettig, MD1
# M L; w3 q' k* D1 f& X1 g5 TClinical Pediatrics
9 L. [, q4 `" r+ [9 \; ], l% DVolume 46 Number 6
" I5 C. k5 P8 V, G0 Z# U8 WJuly 2007 540-5436 V6 ^9 T. Z5 P( }0 c
© 2007 Sage Publications" r. F% c' V+ u( M
10.1177/0009922806296651
|4 i' h- K7 ]9 @& dhttp://clp.sagepub.com
6 [: w% R; K a0 ]! jhosted at! h* q$ g' `6 ~/ ]+ {' s
http://online.sagepub.com: J/ v/ E r" o
Precocious puberty in boys, central or peripheral,
" @8 B+ R) Y2 w$ His a significant concern for physicians. Central
0 `4 r& l) g9 xprecocious puberty (CPP), which is mediated
6 ]# |0 p/ ], F2 S8 M) h2 P ]through the hypothalamic pituitary gonadal axis, has
) J1 W/ x' Q2 U& [a higher incidence of organic central nervous system8 P. `5 {! n; V6 J% O% L) ]
lesions in boys.1,2 Virilization in boys, as manifested F1 c1 }6 d, g9 ]9 g: L% Z
by enlargement of the penis, development of pubic. S4 r3 L& W" C, W
hair, and facial acne without enlargement of testi-' ?8 X; e3 @$ T' c% M( _$ a b% n
cles, suggests peripheral or pseudopuberty.1-3 We" a9 {3 g! @$ Q k. P1 K; C1 m( K
report a 16-month-old boy who presented with the# F3 {+ P1 j ~6 s
enlargement of the phallus and pubic hair develop-
I" P% h; ]+ f: V" {ment without testicular enlargement, which was due
& U! G# U6 Q: V' f7 ato the unintentional exposure to androgen gel used by; n4 w, B% L( S% b! j
the father. The family initially concealed this infor-
8 F. Q$ T' z% }7 H( ~" qmation, resulting in an extensive work-up for this
5 A- Q# r& J+ S) q) {3 Mchild. Given the widespread and easy availability of
* I* {9 \4 e" O3 S. Q) }testosterone gel and cream, we believe this is proba-( ^0 Z$ y) m i
bly more common than the rare case report in the
; J5 I! k) o' Q8 A9 z& x" }5 Kliterature.4 m4 o$ }7 l- M5 I: a" ?. |
Patient Report8 W5 ?7 w8 B, i3 ]
A 16-month-old white child was referred to the; N6 T7 {( N- f' H
endocrine clinic by his pediatrician with the concern0 V# N8 k, F M! Q& B6 M
of early sexual development. His mother noticed& o, b& K; E1 u0 ~
light colored pubic hair development when he was
0 r! [8 A& Z8 Y+ k) OFrom the 1Division of Pediatric Endocrinology, 2University of
! x, Y$ w! U* L/ W% | NSouth Alabama Medical Center, Mobile, Alabama./ n& Q; `9 A1 f3 a X& J9 Y
Address correspondence to: Samar K. Bhowmick, MD, FACE,1 R: P6 W& Y( l; g T
Professor of Pediatrics, University of South Alabama, College of+ i9 ]5 g9 I) X+ j
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;/ O8 T2 x7 r1 c
e-mail: [email protected].
4 @1 k+ \3 h9 O5 Pabout 6 to 7 months old, which progressively became* k, G) s/ W8 f2 O; ^' P. [, z
darker. She was also concerned about the enlarge-
$ h3 t2 s: I8 w/ {* ~( z- X0 j( hment of his penis and frequent erections. The child7 d* o) M. z5 C/ W' L
was the product of a full-term normal delivery, with
: R% |- O$ r/ ]6 J6 v" `# V, ta birth weight of 7 lb 14 oz, and birth length of
: @, L) S5 F. B9 F( Z8 ]7 ?+ B& k20 inches. He was breast-fed throughout the first year
0 n' M' i7 l8 o, Q. l; V* C( f+ F8 Bof life and was still receiving breast milk along with, P# E: k' t6 R+ s. W, R& L8 b
solid food. He had no hospitalizations or surgery,
' C1 q# t4 S8 k9 Z4 W/ A' d4 Pand his psychosocial and psychomotor development
" Z9 O" v+ p" k3 l0 G' U' _: T+ D( P0 twas age appropriate. S9 e* y! }0 G! A7 l
The family history was remarkable for the father, C/ A& H$ J) `9 ^6 W
who was diagnosed with hypothyroidism at age 16,
0 ^/ T/ R. t$ V9 |% ewhich was treated with thyroxine. The father’s
( U2 p9 {; g2 n( _- A. C1 Wheight was 6 feet, and he went through a somewhat1 M! o7 g/ U7 x
early puberty and had stopped growing by age 14.' S+ ]' A+ l4 f/ }
The father denied taking any other medication. The3 ]" H+ k: k8 \1 N1 Y
child’s mother was in good health. Her menarche
2 ~. K4 p$ W& X0 U0 Iwas at 11 years of age, and her height was at 5 feet
$ e O% |, d/ ]: d5 inches. There was no other family history of pre-8 x: \+ y# ^6 o4 {6 T
cocious sexual development in the first-degree rela-0 i7 L% z3 B9 p
tives. There were no siblings.
/ s' q0 E" s# ?! x+ U. c2 d8 ~Physical Examination
9 v7 N H* p2 X5 x; T" WThe physical examination revealed a very active,
% c* x+ C9 H7 Z6 J. l, S4 x. [9 _playful, and healthy boy. The vital signs documented
' `, v2 ^/ z, d5 G4 s. e% ba blood pressure of 85/50 mm Hg, his length was
" Q2 b* r0 `- N: n7 d" \( Y90 cm (>97th percentile), and his weight was 14.4 kg
4 w A6 @* a5 a* k5 w(also >97th percentile). The observed yearly growth
9 D/ K! B0 f% L9 @! L% S$ xvelocity was 30 cm (12 inches). The examination of* r: s# }, M W
the neck revealed no thyroid enlargement.
# W {3 A% u/ {The genitourinary examination was remarkable for
# W% \( D1 C; c. E) B5 t8 qenlargement of the penis, with a stretched length of* E% E% S" f/ H: e0 c! g- Q
8 cm and a width of 2 cm. The glans penis was very well% b' V3 m7 |7 j8 m7 R2 _* h
developed. The pubic hair was Tanner II, mostly around* E- ]. `# J6 R" u! [* D& e: h' M( D
540, i0 R. J! u. l" s W/ T
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; s8 `+ W6 l0 d( U0 v
the base of the phallus and was dark and curled. The# y4 z" l2 q/ S
testicular volume was prepubertal at 2 mL each.& q, Y" T5 a+ O+ \ Q
The skin was moist and smooth and somewhat
; q: r. |8 a* k# t- ioily. No axillary hair was noted. There were no2 i& G1 @/ G2 x+ T; f5 z! d
abnormal skin pigmentations or café-au-lait spots.5 q! c( s1 T* F% t% @" P% z" d! u6 T
Neurologic evaluation showed deep tendon reflex 2++ l9 b! U6 ]" Y& k0 \
bilateral and symmetrical. There was no suggestion
' @( K3 t& i0 hof papilledema.
3 S0 i/ h9 R* d# }Laboratory Evaluation1 U6 k% Q; ~0 L
The bone age was consistent with 28 months by
/ J& s) q( `- q) Zusing the standard of Greulich and Pyle at a chrono-7 Z6 v* I2 @. I9 O0 H
logic age of 16 months (advanced).5 Chromosomal
; Y1 d- a, y5 s6 C- p. V1 Kkaryotype was 46XY. The thyroid function test
- F% b4 B* S0 J1 dshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
# j/ e T1 Q. ]1 P/ {lating hormone level was 1.3 µIU/mL (both normal).2 T; u# e! \/ j9 Z, O
The concentrations of serum electrolytes, blood
/ S$ u! ?# K6 Vurea nitrogen, creatinine, and calcium all were
; k1 \4 Q! a4 Z$ u, Z" Iwithin normal range for his age. The concentration* q1 y( i D- S3 n8 t F$ C
of serum 17-hydroxyprogesterone was 16 ng/dL
1 [7 ?# ~7 p6 X) S+ x(normal, 3 to 90 ng/dL), androstenedione was 20
, b) ?) l6 W t) P l* h% ing/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
' s- k" ]* ^# l) N; I" Lterone was 38 ng/dL (normal, 50 to 760 ng/dL),
# I$ F! n) J1 U# p, ]* L8 e. tdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
1 B1 |& j1 h3 s8 e7 |! b0 L. y5 v49ng/dL), 11-desoxycortisol (specific compound S)+ |. ]6 W) r0 [8 M
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
* L' b1 j4 {- [* D! W8 b7 Gtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
& {0 ~ @& S+ ]! C, [- ~* ftestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
3 i' ^; {" B: i% e) Y* `1 iand β-human chorionic gonadotropin was less than
$ p9 l# i0 r8 ~3 L# g$ ~5 mIU/mL (normal <5 mIU/mL). Serum follicular# x6 S% a4 |8 J, x
stimulating hormone and leuteinizing hormone6 u2 [0 Y8 i# h4 @2 w- l7 e
concentrations were less than 0.05 mIU/mL5 K: X. b: U' i
(prepubertal).
: m, t* s- e( M9 YThe parents were notified about the laboratory
7 ^8 n8 r7 K" k3 c$ A, @$ Y. sresults and were informed that all of the tests were7 i. ]8 {- ]. Z
normal except the testosterone level was high. The
" j: X/ l/ k5 e6 j3 |: pfollow-up visit was arranged within a few weeks to( Z- Z, S* ]3 q
obtain testicular and abdominal sonograms; how-; y' M% ?) m( N1 t
ever, the family did not return for 4 months.0 j5 L9 l1 |/ w$ y. g* p
Physical examination at this time revealed that the
6 J! u# Z5 Z( _- H, D" Xchild had grown 2.5 cm in 4 months and had gained) V( v, m8 e+ j- L2 [! u4 B
2 kg of weight. Physical examination remained+ G# [% |% p; `* Q2 _
unchanged. Surprisingly, the pubic hair almost com-
# u" I+ j1 H4 G% p3 c7 O2 Opletely disappeared except for a few vellous hairs at
' G3 i0 {% S$ N) j, i+ P! qthe base of the phallus. Testicular volume was still 2
; o% _, A: W+ }/ Z0 OmL, and the size of the penis remained unchanged.! ^/ ^" G' ^0 b* q8 ]; p
The mother also said that the boy was no longer hav-
; g5 G5 n# r9 w7 o3 z6 Aing frequent erections., ]# J- a' Q6 X4 L# R# e# r
Both parents were again questioned about use of
3 T7 @1 W2 H, @any ointment/creams that they may have applied to" T8 v2 W' S% q( J
the child’s skin. This time the father admitted the! J& [* y) s$ F
Topical Testosterone Exposure / Bhowmick et al 541
2 `1 J6 D6 D5 N8 U/ U% X, luse of testosterone gel twice daily that he was apply-# D& D5 Z, y' k8 ~
ing over his own shoulders, chest, and back area for
1 B5 i7 {$ M8 s4 E& N# Ja year. The father also revealed he was embarrassed: E6 u, a5 z- z) ^
to disclose that he was using a testosterone gel pre-
1 H6 G) u7 y" z+ e' pscribed by his family physician for decreased libido
( s2 x' w: l( M: Z* P1 jsecondary to depression.
" x0 c9 j8 R9 p+ d& JThe child slept in the same bed with parents.. f0 H) v$ J4 B1 q6 `- K$ v/ u9 w
The father would hug the baby and hold him on his
3 w, E$ K% Z! d" m8 O9 ?. Cchest for a considerable period of time, causing sig-! D9 P h0 k$ g& D9 g; x+ G0 K+ a
nificant bare skin contact between baby and father.
+ C, y5 l+ j5 j$ K: I* XThe father also admitted that after the phone call,4 M; E _* R# `" o$ Z0 B( M
when he learned the testosterone level in the baby
) k4 n& e& m" Mwas high, he then read the product information' l$ ~# r$ j5 \3 ^# l* l; h
packet and concluded that it was most likely the rea-- _' G, K* k/ n) ?5 E" X. l! O C& \
son for the child’s virilization. At that time, they
& @& D; ~$ r- Mdecided to put the baby in a separate bed, and the
0 y+ W; R3 ?& ^; k: jfather was not hugging him with bare skin and had
0 P1 H9 s% M; N' ~) @9 `9 t7 Obeen using protective clothing. A repeat testosterone
( _1 }5 Y* O& S$ c9 Ntest was ordered, but the family did not go to the6 D% s( |" n1 w
laboratory to obtain the test.
) p1 f9 e/ G0 x' ~. T4 jDiscussion" z8 S: ^7 b4 l( r' E ^) I7 m1 \
Precocious puberty in boys is defined as secondary
( s7 _2 l- {! M f9 psexual development before 9 years of age.1,4* U' `# R* e" k& f+ S1 b7 J" g
Precocious puberty is termed as central (true) when
P" ~3 I. e# X0 P4 Hit is caused by the premature activation of hypo-) `% Z: W! n3 d2 v0 t
thalamic pituitary gonadal axis. CPP is more com-& D2 l6 d. F" ?3 x4 I0 f5 D
mon in girls than in boys.1,3 Most boys with CPP
* y5 P- E. m7 }+ imay have a central nervous system lesion that is9 N' a4 F6 G, b! J8 B
responsible for the early activation of the hypothal-, B9 l v4 n$ Q4 Q
amic pituitary gonadal axis.1-3 Thus, greater empha-5 ~8 O, |& i5 I; V
sis has been given to neuroradiologic imaging in
0 e0 S+ x1 K; }boys with precocious puberty. In addition to viril-
8 z! l' Y# b4 Z: a" b& Vization, the clinical hallmark of CPP is the symmet-9 S E S; z% o
rical testicular growth secondary to stimulation by
$ [6 }& [ O igonadotropins.1,3" g' T4 m% X( e& S+ J
Gonadotropin-independent peripheral preco-
/ A4 w) e+ w# J% ~5 Lcious puberty in boys also results from inappropriate
1 s. e4 b& r9 z% b$ |4 randrogenic stimulation from either endogenous or
4 |4 m$ `7 c8 Q7 K& Wexogenous sources, nonpituitary gonadotropin stim-# b) H7 x; _3 ~2 W& W
ulation, and rare activating mutations.3 Virilizing
* T. U" \& _7 A5 I& I, a1 |congenital adrenal hyperplasia producing excessive
, N6 G" W( D/ Wadrenal androgens is a common cause of precocious
4 J. I0 a) _& ]$ r( C0 gpuberty in boys.3,4/ ]) Q4 W: B) c, V& i' l3 E6 f1 \
The most common form of congenital adrenal
2 A& t% s. N) W* l' \9 l( x5 ghyperplasia is the 21-hydroxylase enzyme deficiency.
) t7 Y4 ]% B7 K& A0 ?) }4 z1 ~8 p- LThe 11-β hydroxylase deficiency may also result in+ l I( r8 N/ `# I& g. ?8 O
excessive adrenal androgen production, and rarely,/ W* c- W K( e8 F
an adrenal tumor may also cause adrenal androgen
% c. ]+ I& R+ r1 f" ?; bexcess.1,3
: E+ r! J. ?2 D6 Pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ |. ~ i [; p, Z: o f& @; v8 I
542 Clinical Pediatrics / Vol. 46, No. 6, July 20076 l" e# v) L' k; c$ @, `
A unique entity of male-limited gonadotropin-* i, {5 N+ a) j8 u1 Y; M* t3 r$ l1 G
independent precocious puberty, which is also known6 e" K! y, _; d. w2 ~$ j
as testotoxicosis, may cause precocious puberty at a
3 r- ~' ` I/ C% O9 @' Yvery young age. The physical findings in these boys/ G* S+ j7 K& }
with this disorder are full pubertal development,
. e$ X6 I+ |- N. iincluding bilateral testicular growth, similar to boys& d$ t" L- Y9 S, u) _ x- p
with CPP. The gonadotropin levels in this disorder
* C* i& i. w8 A g1 c( Lare suppressed to prepubertal levels and do not show5 G7 `; Y7 E( [7 R
pubertal response of gonadotropin after gonadotropin-! `& d% o) e* r5 Y o
releasing hormone stimulation. This is a sex-linked
7 T2 g( j2 s$ G! L7 Xautosomal dominant disorder that affects only
, j4 Y j& {8 h% Q0 P5 S! x* j# O4 Umales; therefore, other male members of the family% T( \- t* T. Z$ z: {
may have similar precocious puberty.3
8 U5 g$ \- u- g5 zIn our patient, physical examination was incon-
. u, l5 w* l5 z& `sistent with true precocious puberty since his testi-) m, }2 o' w: l( H
cles were prepubertal in size. However, testotoxicosis
, S9 M/ Q0 F$ p( k9 {& p1 xwas in the differential diagnosis because his father: n, r a- G* [, P. x5 q# E
started puberty somewhat early, and occasionally,4 a3 u1 I' ^: g# K6 ~( t1 {; k
testicular enlargement is not that evident in the
0 b4 M9 S( l$ y( Hbeginning of this process.1 In the absence of a neg-
: M/ M: A' B& m* k3 b3 A+ A0 |, ^5 zative initial history of androgen exposure, our
7 F" c- J$ N9 F& zbiggest concern was virilizing adrenal hyperplasia,. |4 t2 K1 w* ?/ v0 \, O# u
either 21-hydroxylase deficiency or 11-β hydroxylase. u- b! C/ k$ b ^4 `
deficiency. Those diagnoses were excluded by find-
7 g2 E9 `0 e7 q/ y1 A* bing the normal level of adrenal steroids., ]4 K% x( h/ N% w: U" U
The diagnosis of exogenous androgens was strongly
& q9 k1 F5 ^7 S* s# {suspected in a follow-up visit after 4 months because
1 H7 B2 z6 g3 x( `: xthe physical examination revealed the complete disap-
% t7 E7 A- s( A% Hpearance of pubic hair, normal growth velocity, and
8 g- B2 A( O* Q3 j& j4 U# Edecreased erections. The father admitted using a testos-0 v# K1 y- ^+ J9 {
terone gel, which he concealed at first visit. He was
. |% s4 w% W7 t1 Nusing it rather frequently, twice a day. The Physicians’
4 k* H1 a) L$ aDesk Reference, or package insert of this product, gel or
9 i" i# _" T3 y3 d9 mcream, cautions about dermal testosterone transfer to3 X8 O3 T$ R, I; {( {
unprotected females through direct skin exposure.
5 p6 P! r( \; N4 X0 RSerum testosterone level was found to be 2 times the
: Z6 y7 J2 s: z/ Ubaseline value in those females who were exposed to8 K. }+ v& O8 g3 {$ T, G
even 15 minutes of direct skin contact with their male
' V( |- x, E2 Q! ?2 L$ W4 Mpartners.6 However, when a shirt covered the applica-
! o) N, t/ y* w: m! g8 btion site, this testosterone transfer was prevented.) c4 [! y3 |- ?* K9 J/ r
Our patient’s testosterone level was 60 ng/mL,4 V9 @' H, L5 d
which was clearly high. Some studies suggest that
) A& M) w& }/ q+ i/ _. M) Q6 w* kdermal conversion of testosterone to dihydrotestos-
! z3 ^- q5 \8 f' y% Q; Kterone, which is a more potent metabolite, is more
* I' g( h ]- X) v' ~active in young children exposed to testosterone
. C7 t8 O0 D$ _' l5 K0 W& Uexogenously7; however, we did not measure a dihy-
- O5 `; |, v3 i/ v% }' q4 Edrotestosterone level in our patient. In addition to
3 G1 i* [+ y# x& C9 B0 x$ jvirilization, exposure to exogenous testosterone in$ [* r7 z: I! S, ?" c/ \
children results in an increase in growth velocity and1 A* A1 V" d8 r8 ]6 l% b
advanced bone age, as seen in our patient.+ S5 |6 R/ }: U/ L! ~. O
The long-term effect of androgen exposure during& b3 f: A' J) {% g0 i; D
early childhood on pubertal development and final
: F, \) ]' r5 g6 a) A0 `$ radult height are not fully known and always remain
) j8 G; ^8 B0 a3 i3 Ma concern. Children treated with short-term testos-& M( ?& J! ^: G
terone injection or topical androgen may exhibit some! U- U: o0 y" ` S) D9 K; K" b& P
acceleration of the skeletal maturation; however, after0 z4 b& n, w% A7 `' H! n; T6 h% ^
cessation of treatment, the rate of bone maturation
- z* q/ E0 k3 w, h: bdecelerates and gradually returns to normal.8,9
: Z( {/ C& v+ O2 ^ d7 UThere are conflicting reports and controversy
5 Z( `0 M: U8 s2 ~* I" z! O7 dover the effect of early androgen exposure on adult
# o6 [# Q0 j! e. t! I: Lpenile length.10,11 Some reports suggest subnormal3 m6 s% u G9 \0 b7 o
adult penile length, apparently because of downreg-* ]" y* u3 Y2 L1 }3 c
ulation of androgen receptor number.10,12 However,
4 ]* N7 t/ ^% i# ~7 |+ o1 ~ w3 GSutherland et al13 did not find a correlation between
1 r$ N+ g' D" Dchildhood testosterone exposure and reduced adult* F( `* i) V* V4 s) z. s2 S; H
penile length in clinical studies.
~( c: z' a g1 K& b1 t. ONonetheless, we do not believe our patient is
' i; O& N' Y; L; x- P8 Zgoing to experience any of the untoward effects from
4 L- T' h- _5 {* V) [testosterone exposure as mentioned earlier because; E- y# z: D* z) U2 _. M
the exposure was not for a prolonged period of time.
" Z. c/ _# e: `# T% j4 [Although the bone age was advanced at the time of4 R( G C" Y! a6 |' q! m+ m
diagnosis, the child had a normal growth velocity at( _/ p: C6 w8 i
the follow-up visit. It is hoped that his final adult
* v! S# } K3 a0 Gheight will not be affected.' k0 |' v2 y6 t" N6 ?
Although rarely reported, the widespread avail-) M; w% B1 \6 n0 C, M
ability of androgen products in our society may
" y* q8 \. F- p( A( k7 N" h" f G$ Lindeed cause more virilization in male or female
5 g/ S& E z! y! [$ F0 Mchildren than one would realize. Exposure to andro-0 u1 @/ B6 t* R6 P# w
gen products must be considered and specific ques-: f* U3 D: n; H" R/ V" S
tioning about the use of a testosterone product or
+ X6 H. h; K% u" H" r6 jgel should be asked of the family members during
- S3 Q& A' O/ D. \+ Ythe evaluation of any children who present with vir-* e( `' x0 r3 F* S! @* G
ilization or peripheral precocious puberty. The diag-
7 h' q6 y" y6 {: @: N* J# ^nosis can be established by just a few tests and by. C$ g* o [8 {
appropriate history. The inability to obtain such a
( K- z& @& h6 _! O* q3 r% Ghistory, or failure to ask the specific questions, may" J- b! G$ H! x% S" N3 P
result in extensive, unnecessary, and expensive; Z* a) {0 v' e9 J3 a
investigation. The primary care physician should be" m6 P* F2 l: }! s. g
aware of this fact, because most of these children
1 _- f4 b6 ^: [ K+ U- u9 T' m& {may initially present in their practice. The Physicians’, u- k2 W# w' {3 ]( i d4 `
Desk Reference and package insert should also put a
8 a, b/ M2 i+ o% r+ z# m( S% c! P, R+ Zwarning about the virilizing effect on a male or
+ |6 r3 u% y7 D+ U6 Dfemale child who might come in contact with some-
* W T5 z" b% V- m0 K- Bone using any of these products.
9 ?2 A+ }/ x) A7 EReferences7 y, W/ f4 J3 }3 C% b
1. Styne DM. The testes: disorder of sexual differentiation* `' Y5 v3 e/ q0 n% E
and puberty in the male. In: Sperling MA, ed. Pediatric
4 y; X3 ]4 c2 K! V* O4 ZEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
% p) y! B! O% I2002: 565-628.
0 A/ a+ A, r$ c2 J0 X2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious+ x7 M9 d! i" f! O1 ~
puberty in children with tumours of the suprasellar pineal |
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