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Sexual Precocity in a 16-Month-Old
- @( F7 u9 Y+ t7 J3 iBoy Induced by Indirect Topical7 o: a. y% p0 ^4 e% S+ T( J
Exposure to Testosterone% D; P3 c* ^) c) C) q
Samar K. Bhowmick, MD, FACE,1 Tracy Ricke, MD,2% P& F6 z1 k. c5 W2 P
and Kenneth R. Rettig, MD1
& M- E2 D8 Z; T/ H7 uClinical Pediatrics
9 n5 O: O2 m. u* F5 W# g! WVolume 46 Number 6
. x# v5 O3 b" g( `$ q: q- wJuly 2007 540-543; } b! L& n$ ~2 ~+ Y5 n
© 2007 Sage Publications- x# `+ y5 N5 i% W) n) F
10.1177/0009922806296651
2 j5 T& ?- t$ }. \http://clp.sagepub.com" d# k0 g6 [ n7 M& t+ d
hosted at
7 {! |& n) {1 g& ~2 ?) nhttp://online.sagepub.com$ a4 Q: [& W0 M4 I# _: a$ B. O
Precocious puberty in boys, central or peripheral,
7 `2 E8 j2 A$ O1 ]0 ois a significant concern for physicians. Central: d/ J4 Y2 W5 }. t- ~
precocious puberty (CPP), which is mediated
6 F- r0 p1 `& ]( d4 Hthrough the hypothalamic pituitary gonadal axis, has2 a% o2 r4 m/ D
a higher incidence of organic central nervous system* B( N4 P9 f1 w0 Q8 e
lesions in boys.1,2 Virilization in boys, as manifested
8 ^. ` m/ g2 r$ p3 dby enlargement of the penis, development of pubic8 m) f- h, u, Q: Q
hair, and facial acne without enlargement of testi-3 f3 c: f5 ^+ B% L0 S9 ^& Y7 u+ f
cles, suggests peripheral or pseudopuberty.1-3 We7 l" G7 u9 E( _: ^( Z
report a 16-month-old boy who presented with the
]1 C5 y, X+ W0 zenlargement of the phallus and pubic hair develop-" t# z9 j& X; u# F. x$ ?# j& `9 _ q) e
ment without testicular enlargement, which was due
" x9 X3 p6 [+ D* w1 W4 e" kto the unintentional exposure to androgen gel used by& r- @! u/ R% s# f
the father. The family initially concealed this infor-
) w7 w5 o1 U4 Ymation, resulting in an extensive work-up for this
4 K- Q6 Y9 i! fchild. Given the widespread and easy availability of
! X3 `/ P! F2 O' X+ Utestosterone gel and cream, we believe this is proba-
) }# |% @( W- J6 U6 m& p/ z1 qbly more common than the rare case report in the- M3 O$ |. U0 G* c* Z. T
literature.4
6 ?6 b; m6 y, c2 uPatient Report$ A6 g9 R5 M) ]/ l- O! w
A 16-month-old white child was referred to the$ x! T0 g/ ? c: f `2 X
endocrine clinic by his pediatrician with the concern
. r' l6 u! K; p) Wof early sexual development. His mother noticed$ n: ^) H: q6 A+ K7 Z( u2 I
light colored pubic hair development when he was; j, m7 y' }6 ^1 ]# l! M, F& W% N
From the 1Division of Pediatric Endocrinology, 2University of' d' f6 |4 F& }
South Alabama Medical Center, Mobile, Alabama.# n1 l2 X8 U% X9 z
Address correspondence to: Samar K. Bhowmick, MD, FACE,
9 X2 C- k: [6 }$ E, R% f8 uProfessor of Pediatrics, University of South Alabama, College of$ V/ O9 ]- c! l
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
+ z }8 f& K# p/ P8 Qe-mail: [email protected].4 I( i2 P# P6 p) e' W/ ~: P2 H5 r
about 6 to 7 months old, which progressively became
`; U k. e- c ndarker. She was also concerned about the enlarge-
" `* I4 W1 Y( g- Lment of his penis and frequent erections. The child
, J9 P3 V3 C2 B1 I; Ewas the product of a full-term normal delivery, with3 _, J. K0 [. {$ y! O
a birth weight of 7 lb 14 oz, and birth length of
0 \% R" t$ r; h; r9 H. r20 inches. He was breast-fed throughout the first year9 i f, T3 P! Q
of life and was still receiving breast milk along with' d+ I" F- T/ j
solid food. He had no hospitalizations or surgery,
, l/ P7 M+ p+ i# S" band his psychosocial and psychomotor development
+ c* I' W4 ?; m9 Q- x! I _; twas age appropriate.
+ N3 @1 P, w b# W8 ?7 ?The family history was remarkable for the father,. q4 P5 m. M1 a5 h
who was diagnosed with hypothyroidism at age 16,
1 W5 I# j# ]# o. O* F$ L4 L% K7 Awhich was treated with thyroxine. The father’s
$ Q' X4 \- s: F7 Vheight was 6 feet, and he went through a somewhat# g$ q% G& \( ?! B( W c" @: Y
early puberty and had stopped growing by age 14.; x/ k. T4 a; s0 J: _5 T; B4 w" V
The father denied taking any other medication. The
* H% w |" W& B& Z5 s0 ]child’s mother was in good health. Her menarche6 q! ~3 [4 u, Z' f/ \
was at 11 years of age, and her height was at 5 feet; C2 q# s5 Z& W) y4 m0 ]: z
5 inches. There was no other family history of pre-
5 b0 `2 R% N' U0 _cocious sexual development in the first-degree rela-0 f* ~8 B) r3 y: |( L
tives. There were no siblings.4 ?0 E; ~ {, ?1 n$ g# x5 l
Physical Examination3 O; f6 _& }* |0 Q) [$ j1 G" |4 T
The physical examination revealed a very active,
* W9 l( X3 Y+ V, D9 ?playful, and healthy boy. The vital signs documented
2 `0 _3 l+ H- `a blood pressure of 85/50 mm Hg, his length was. T; t6 y- v% w9 o
90 cm (>97th percentile), and his weight was 14.4 kg
" T5 L& l! r; ]9 w0 M(also >97th percentile). The observed yearly growth
7 H9 r- M3 F2 {+ G4 Z8 ^velocity was 30 cm (12 inches). The examination of% {3 _* `" Q0 ~6 a# m; [
the neck revealed no thyroid enlargement.' ~% E+ B# @0 M, ~ |) G+ g
The genitourinary examination was remarkable for4 v4 j K( _+ u
enlargement of the penis, with a stretched length of- z, ]% g, F8 i2 A3 ?
8 cm and a width of 2 cm. The glans penis was very well r" D6 l$ q) V6 N5 x
developed. The pubic hair was Tanner II, mostly around
3 P% M; c6 I/ b8 `+ A540
6 d9 A) k' \; Tat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ P" u# m* r s
the base of the phallus and was dark and curled. The
! W5 h, O; n9 O& z% ttesticular volume was prepubertal at 2 mL each.
A9 N# H& Z2 h# C0 qThe skin was moist and smooth and somewhat
- E) b' E4 S' D8 b3 o T' W* u, A) Zoily. No axillary hair was noted. There were no( a7 c5 K- x8 e
abnormal skin pigmentations or café-au-lait spots.
) G) B' C! h4 t4 hNeurologic evaluation showed deep tendon reflex 2+# w4 P2 H6 y, z$ B; Q- Q
bilateral and symmetrical. There was no suggestion% o: p8 a) ]8 X- Y; T
of papilledema.0 U6 K" h" {* ^8 T2 ~) d3 i C+ g X7 g6 N
Laboratory Evaluation
, b( w3 E8 f7 d1 [" bThe bone age was consistent with 28 months by
! g3 f7 n& s- }1 x/ Nusing the standard of Greulich and Pyle at a chrono-
. ?2 E' l6 v# {; mlogic age of 16 months (advanced).5 Chromosomal
+ G3 x7 a5 S9 W4 t' ykaryotype was 46XY. The thyroid function test& \# a+ F; l) I7 A: o3 ]( K# m
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
) b; x8 }& G- s* s6 n8 b( ylating hormone level was 1.3 µIU/mL (both normal).
- g! o" O0 ]; O, _The concentrations of serum electrolytes, blood
, c' O* n7 d2 ?7 N4 Y2 f6 P8 g$ g% lurea nitrogen, creatinine, and calcium all were
; P5 `3 M+ d6 L/ L2 Vwithin normal range for his age. The concentration/ [( a2 @% }6 j; f" S
of serum 17-hydroxyprogesterone was 16 ng/dL$ ?1 r0 ?1 r- ~2 H
(normal, 3 to 90 ng/dL), androstenedione was 20
, @5 {! z5 j! lng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-: s$ ^- M% w4 u0 ~% ? c
terone was 38 ng/dL (normal, 50 to 760 ng/dL),4 r( b1 [7 S! ~) f3 I
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
" d* K9 X2 f9 ^4 C; r3 I49ng/dL), 11-desoxycortisol (specific compound S)/ `& Z* `, w9 h4 G6 B$ K
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
# h; L3 j0 `2 e0 I0 f# J- I7 Htisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
' l$ p1 r9 ~+ a. v2 j" Ftestosterone was 60 ng/dL (normal <3 to 10 ng/dL),4 A* U: o, w/ |2 U% [+ O& i
and β-human chorionic gonadotropin was less than7 K* D1 _' N8 d8 I! G
5 mIU/mL (normal <5 mIU/mL). Serum follicular
) L& ^1 X6 x, j& K. e" istimulating hormone and leuteinizing hormone
4 ? N/ d+ E7 ?: mconcentrations were less than 0.05 mIU/mL
: G4 \- j- e4 R7 v$ @1 N8 c(prepubertal).! a7 m1 C4 S7 e* n" k
The parents were notified about the laboratory
7 j& O( U; h: h/ }results and were informed that all of the tests were
/ U9 x% {: ?# s/ ?" A3 Qnormal except the testosterone level was high. The
% i: K# ]. {7 H) d; ^* y1 Ofollow-up visit was arranged within a few weeks to
) o4 z+ o: u, Tobtain testicular and abdominal sonograms; how-8 y+ |" B% W' p2 }# ~) h, q4 X
ever, the family did not return for 4 months.0 r3 B8 a. M2 |, @! g( a' m
Physical examination at this time revealed that the2 R) g* G! [2 v3 }7 _, q
child had grown 2.5 cm in 4 months and had gained2 W' `* l/ O) ]. [
2 kg of weight. Physical examination remained J+ @1 u7 J* z2 n; a/ l
unchanged. Surprisingly, the pubic hair almost com-
9 q+ U8 |( d, P, Z5 Upletely disappeared except for a few vellous hairs at, ^3 N. [, W) X8 a+ K& B( H
the base of the phallus. Testicular volume was still 21 d6 d3 }5 o4 P! i. c) O' H& B
mL, and the size of the penis remained unchanged.
8 Y2 N+ c% N; TThe mother also said that the boy was no longer hav-
- d$ [) H2 S W) T( l B6 Ting frequent erections.7 J* E+ i% P3 L
Both parents were again questioned about use of8 A8 T4 Y- i8 ^7 s2 Y" Y
any ointment/creams that they may have applied to
N" P* x/ {% r4 d+ r7 Bthe child’s skin. This time the father admitted the
+ B8 m6 @5 ?" z# l# DTopical Testosterone Exposure / Bhowmick et al 541% r# R( U N& N7 i: ^+ W
use of testosterone gel twice daily that he was apply-
Q% {' G5 s/ ?$ P9 ~0 F5 l8 F+ }( `ing over his own shoulders, chest, and back area for
: k2 V: q- o3 ?' L o* Wa year. The father also revealed he was embarrassed2 |* @9 w8 z7 @- s$ M
to disclose that he was using a testosterone gel pre-, |) L; d% ]9 G/ M5 i
scribed by his family physician for decreased libido4 B+ |4 d- f1 a* V0 g( o1 N5 `6 P
secondary to depression.4 |* {( {7 e3 E
The child slept in the same bed with parents.0 y& v# e5 f1 S1 l
The father would hug the baby and hold him on his
; h @- [) x- m C& Rchest for a considerable period of time, causing sig-& N b9 {: ?. u5 O. p
nificant bare skin contact between baby and father.
5 k$ w* S. _4 G7 v$ @) QThe father also admitted that after the phone call,5 }6 d6 b! [- g) G+ _" q& }
when he learned the testosterone level in the baby5 A* X' G: J" E8 `0 |- u: g
was high, he then read the product information0 J$ I; V5 w# Y8 O( d% {0 g R- n
packet and concluded that it was most likely the rea-8 c0 Z6 X, s" }% `" O7 T' D
son for the child’s virilization. At that time, they
) j+ }4 _3 y& `decided to put the baby in a separate bed, and the% I o) c) X" E' t0 m
father was not hugging him with bare skin and had/ S6 j, t% q. u1 \6 \' Q
been using protective clothing. A repeat testosterone
: o% U* ]8 Q4 U% |! |' Ytest was ordered, but the family did not go to the6 q F( m- a! R1 w, r6 i, e
laboratory to obtain the test.
T9 t* I# z0 ~, }! C8 z. NDiscussion8 Q" q/ P% d6 j$ E7 x
Precocious puberty in boys is defined as secondary3 e( h5 p- z. V2 ~; [
sexual development before 9 years of age.1,42 Z7 V" A2 Q7 s; K8 y( N
Precocious puberty is termed as central (true) when2 S2 S9 n0 ^! _7 [9 i4 G
it is caused by the premature activation of hypo-
0 d& `8 x6 U3 |- b6 v5 uthalamic pituitary gonadal axis. CPP is more com-
5 S; d7 W! m2 fmon in girls than in boys.1,3 Most boys with CPP
0 V3 i* v. V7 O# B. qmay have a central nervous system lesion that is* R9 X$ k- H& x4 O, M! O, h6 }+ E
responsible for the early activation of the hypothal-
/ z I, q. K; f. L- Hamic pituitary gonadal axis.1-3 Thus, greater empha-
. `2 [; M2 n6 J$ I" Bsis has been given to neuroradiologic imaging in
/ Z- ^+ z/ x' b$ L- Iboys with precocious puberty. In addition to viril-( d2 }* M l+ L1 L, |, ~
ization, the clinical hallmark of CPP is the symmet-
1 ]+ a0 N* w1 orical testicular growth secondary to stimulation by
6 w8 O" ]7 L2 ~- xgonadotropins.1,3
, F _2 m# J& g3 f' R* O2 p8 `Gonadotropin-independent peripheral preco-
; J1 x1 r* s) M- e4 s* X) S$ Mcious puberty in boys also results from inappropriate
" g# _0 h/ M: P5 H& q' jandrogenic stimulation from either endogenous or- I+ c8 K, _4 U! T0 k6 v
exogenous sources, nonpituitary gonadotropin stim-* C, P$ S- [+ q+ h1 x9 E/ @& R" [' w
ulation, and rare activating mutations.3 Virilizing
+ \4 w. u. I% J2 E0 zcongenital adrenal hyperplasia producing excessive0 |% L4 h% _. z1 b. g
adrenal androgens is a common cause of precocious
4 _' o4 F4 `5 F. R. C" \4 zpuberty in boys.3,46 j0 e$ J- x. {: r3 V% V4 m
The most common form of congenital adrenal
) d" x/ O) K6 T+ }hyperplasia is the 21-hydroxylase enzyme deficiency.2 |+ \" N0 {3 S' U
The 11-β hydroxylase deficiency may also result in1 x& v2 }! x5 F5 a" H0 f4 l% S. z X
excessive adrenal androgen production, and rarely,
! Y/ q7 G+ `+ X, _, M+ M& l7 qan adrenal tumor may also cause adrenal androgen _8 T. o# N6 X6 v6 g6 B/ y3 ~: ]
excess.1,3
, \ x5 d0 E, P$ r6 J: ?3 O) bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ y- A6 B7 q& s- k: l3 f3 e8 W. ?542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
) T+ V" W) ~' D( b TA unique entity of male-limited gonadotropin-
2 |$ ^4 Q9 d/ x% A# Cindependent precocious puberty, which is also known
o, e3 K1 k& ?. [$ J% K1 ras testotoxicosis, may cause precocious puberty at a8 f1 Y# B* n3 n- }$ z
very young age. The physical findings in these boys
7 C0 ~- r# C4 Q L6 M# _with this disorder are full pubertal development,
: d5 m( I- m2 D& X+ kincluding bilateral testicular growth, similar to boys+ o& n9 ]: }) p5 T! u2 t: n1 N) }
with CPP. The gonadotropin levels in this disorder
$ X: V6 m w/ [% c# B* Nare suppressed to prepubertal levels and do not show
$ I$ {" i- U! j! xpubertal response of gonadotropin after gonadotropin-8 |/ L, @! v8 f. {
releasing hormone stimulation. This is a sex-linked
; O+ d3 a4 h3 t% nautosomal dominant disorder that affects only9 S+ i& ~* C3 Z/ g8 b- o3 s
males; therefore, other male members of the family
' ^; R, d+ O2 G Xmay have similar precocious puberty.3
. k9 B/ v3 ]: WIn our patient, physical examination was incon-
) {( J5 T, l( R- Q+ D8 _sistent with true precocious puberty since his testi-. }2 v& H9 b0 n- C( c' S$ c
cles were prepubertal in size. However, testotoxicosis
9 G2 R! n, _$ |was in the differential diagnosis because his father, e, V, I. {+ s* G% @
started puberty somewhat early, and occasionally,
: p- R( Q: t) l8 \testicular enlargement is not that evident in the
, l1 k# s" F" J7 J8 P9 \; e# p2 Ebeginning of this process.1 In the absence of a neg-
1 `: D, T4 ?0 e8 [ative initial history of androgen exposure, our
, g% V2 O$ N9 H% b8 w6 e, {biggest concern was virilizing adrenal hyperplasia,; ^# f; c2 X+ X m: [
either 21-hydroxylase deficiency or 11-β hydroxylase% m2 H8 J! \. A0 |+ Q
deficiency. Those diagnoses were excluded by find-0 b% [- [) j" m- y
ing the normal level of adrenal steroids.
: {4 B" H. L; S9 c wThe diagnosis of exogenous androgens was strongly
; K/ N w$ o$ h& gsuspected in a follow-up visit after 4 months because
1 }% q2 X, r) h' \the physical examination revealed the complete disap-
# V: c* A: R. b2 U( d9 W# H, }& R9 |pearance of pubic hair, normal growth velocity, and
& u3 S9 F" U5 L# Zdecreased erections. The father admitted using a testos-: F7 j3 X2 q1 G: ^( _, e
terone gel, which he concealed at first visit. He was; r- w [9 Y0 V5 p4 Y$ P8 p5 h- M% ]
using it rather frequently, twice a day. The Physicians’
6 g0 `5 \* o2 CDesk Reference, or package insert of this product, gel or, \2 J" u4 f4 D
cream, cautions about dermal testosterone transfer to
# W' n/ Y4 p; ^unprotected females through direct skin exposure.4 S+ P: J5 u6 f" e
Serum testosterone level was found to be 2 times the0 ^$ l. a) {3 ]' r4 b& d+ k/ m6 W
baseline value in those females who were exposed to8 \! c% S# k4 P& w
even 15 minutes of direct skin contact with their male( F. A8 F1 H% H7 a. x0 P
partners.6 However, when a shirt covered the applica-
% V @# |5 W9 w/ [! p+ C2 mtion site, this testosterone transfer was prevented.
: }# G! V& g' [8 d7 d0 y: eOur patient’s testosterone level was 60 ng/mL,2 Y' |. \3 f7 K8 H4 m; d- I4 d; N7 {
which was clearly high. Some studies suggest that
* ] ]; n( V) X8 ^! p" ~! Sdermal conversion of testosterone to dihydrotestos-. |! C7 j7 X, X1 e& }8 Q" |( `# A
terone, which is a more potent metabolite, is more' B3 S& L/ B' q' N6 w a1 a
active in young children exposed to testosterone/ v, F! L5 a6 l1 {
exogenously7; however, we did not measure a dihy-
. {2 [+ h' I" f" ^8 }2 l9 ?2 ldrotestosterone level in our patient. In addition to
4 F! ] j6 ?& E* Uvirilization, exposure to exogenous testosterone in$ |" A% I' J/ Z% r w
children results in an increase in growth velocity and% q' p% U( `- S) M' O, Y
advanced bone age, as seen in our patient.
. Q* _2 j3 E" f! CThe long-term effect of androgen exposure during
- N9 s3 o1 b& ~; X4 nearly childhood on pubertal development and final
- v5 a, R- F- b) o6 h4 @adult height are not fully known and always remain# } N4 }, }& e0 i8 u) M8 g3 T
a concern. Children treated with short-term testos-1 p( Z1 n; T3 S3 ~- r& @
terone injection or topical androgen may exhibit some% s/ l5 S( q8 v+ T7 |4 T9 R; Z
acceleration of the skeletal maturation; however, after
& R% V" l4 `# u5 Q* \* z- \# l5 mcessation of treatment, the rate of bone maturation
0 _6 J1 O0 Y- I8 J3 |9 J0 A2 {) Bdecelerates and gradually returns to normal.8,9
" ?* H0 s8 ? l! ?$ uThere are conflicting reports and controversy
$ F# A; ?% H1 i+ r7 c. |over the effect of early androgen exposure on adult5 Q- h2 n# {" x: U9 Y4 S0 s0 k
penile length.10,11 Some reports suggest subnormal
% j* W- v3 c8 X+ Badult penile length, apparently because of downreg-( \6 y) G7 m# C* a( A
ulation of androgen receptor number.10,12 However,
* z7 I s) J4 {Sutherland et al13 did not find a correlation between$ J ?7 ]1 L: d0 M M
childhood testosterone exposure and reduced adult1 W% j2 k5 C$ c( O. _- |- T5 H- \- L# G
penile length in clinical studies.% `- k% I: D5 w9 r- @9 N+ E
Nonetheless, we do not believe our patient is7 I8 G0 N R8 o( }% y
going to experience any of the untoward effects from
2 T' g# w( A& d4 R/ R7 E) [9 R, Jtestosterone exposure as mentioned earlier because" u( u( l G K8 u0 }+ m( ]
the exposure was not for a prolonged period of time.1 L& v- k3 ?1 ?6 r+ v% `3 `
Although the bone age was advanced at the time of
2 x+ @7 F- _( O( o' [diagnosis, the child had a normal growth velocity at
5 m* G& R; Q" H. Q$ ~0 k, ?- pthe follow-up visit. It is hoped that his final adult6 D( ]2 j+ L6 L7 O3 b: m
height will not be affected.$ X6 A2 X8 O0 {
Although rarely reported, the widespread avail-+ A# g8 I2 M3 E1 e1 H D
ability of androgen products in our society may
7 M7 X# S8 b) C: J' _$ c# r7 dindeed cause more virilization in male or female
' ~ o1 V' U' [/ i' Vchildren than one would realize. Exposure to andro-
/ y$ C9 X# b( s9 t# i5 W* @& j6 r( i, Lgen products must be considered and specific ques-0 H8 w, V' q0 e* R& V# x
tioning about the use of a testosterone product or
2 O# K! o# |0 a7 A {8 P7 ygel should be asked of the family members during
1 V5 [7 ^4 T1 Cthe evaluation of any children who present with vir-
9 ~: Q+ k2 s/ ]! oilization or peripheral precocious puberty. The diag-
# O* V9 r3 `. }+ nnosis can be established by just a few tests and by' ]+ a. a1 M/ U
appropriate history. The inability to obtain such a) h6 W5 _, t3 q8 f+ a8 ^8 f" \
history, or failure to ask the specific questions, may
' g }8 x4 e0 @6 _- N2 Nresult in extensive, unnecessary, and expensive/ P* G1 R, v; T, N& x+ y
investigation. The primary care physician should be
, G6 ]/ Z B# D" a# |aware of this fact, because most of these children
5 I2 f$ t4 I) _+ A9 w! bmay initially present in their practice. The Physicians’
* `4 d: a0 K( P% R! L- r( u. M( DDesk Reference and package insert should also put a+ Y* k' i3 f. N" l9 A( N$ L
warning about the virilizing effect on a male or `- ?* e ?9 ~5 ?4 \
female child who might come in contact with some-
9 u, r( ]; I) ^& H, R bone using any of these products.
/ N- P8 u1 n9 j8 ~2 I; XReferences
$ C- y9 ^% r3 x ^1 I2 L9 x1. Styne DM. The testes: disorder of sexual differentiation8 Z; c: d; @& m K* [8 A
and puberty in the male. In: Sperling MA, ed. Pediatric4 a+ R( {7 u1 y" q$ ^
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;. a C [/ [ t* q/ c! ~( s& p5 B
2002: 565-628.
! A- S* r! r3 E5 L, B8 ~2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
& g0 K) ?5 F& ]' ~+ W% ~- I; upuberty in children with tumours of the suprasellar pineal |
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