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is a significant concern for physicians. Central z% O- E& ]2 o3 r- {' {
precocious puberty (CPP), which is mediated
|8 x4 ?9 T4 w+ Q, E- H9 nthrough the hypothalamic pituitary gonadal axis, has2 h1 ?! h, m. Z" Y; E6 e' D- H
a higher incidence of organic central nervous system
9 D6 o& Z5 W5 w6 u! {' m- mlesions in boys.1,2 Virilization in boys, as manifested
- A2 I% j0 a& z/ [8 Cby enlargement of the penis, development of pubic
1 f& a1 a: \1 u$ e: jhair, and facial acne without enlargement of testi-
) W" F2 R# t, Mcles, suggests peripheral or pseudopuberty.1-3 We5 ] G) t& J1 M ~" w
report a 16-month-old boy who presented with the
6 \/ [3 R* C( k& B, r' W3 Oenlargement of the phallus and pubic hair develop-
( |7 s( m7 l T' ?0 [2 s7 y7 Rment without testicular enlargement, which was due8 D9 n: q, B( c2 i3 R
to the unintentional exposure to androgen gel used by2 J3 ~/ D0 \8 T; R5 E; `
the father. The family initially concealed this infor-
* e9 E" P: @) Smation, resulting in an extensive work-up for this) m: |% v6 o7 s1 }' T8 |4 f
child. Given the widespread and easy availability of8 j7 L! e& P5 R% _3 L
testosterone gel and cream, we believe this is proba-# n& p- I' U+ c2 W" D# [
bly more common than the rare case report in the
4 O5 h) S6 N3 wliterature.4& R b4 D4 l6 d) B E/ ~
Patient Report
3 o6 m" n+ I& [* t0 @/ e* |! |A 16-month-old white child was referred to the
$ Q( m/ I$ c1 @* l. W* g" Y) o4 vendocrine clinic by his pediatrician with the concern) m8 J a Z) v8 l! }. K
of early sexual development. His mother noticed- k: m$ Q8 r$ V
light colored pubic hair development when he was5 X e- t1 m/ {& J5 z
From the 1Division of Pediatric Endocrinology, 2University of3 h8 R2 v5 T) m6 \
South Alabama Medical Center, Mobile, Alabama.
9 k* G. ^, t# q/ ?( ^$ \/ V4 {Address correspondence to: Samar K. Bhowmick, MD, FACE,
# Z3 j( I1 t( m8 @- W/ O# ~Professor of Pediatrics, University of South Alabama, College of
9 C3 a1 U/ Y* u. [* a/ y* U2 NMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;+ o7 _% S. V' {2 h- Q
e-mail: [email protected].: Q) m4 L4 {: h3 s b6 F2 Q( v0 y
about 6 to 7 months old, which progressively became1 @5 S$ u) A: }" j0 p
darker. She was also concerned about the enlarge-, \5 @% d4 @5 q# o, h0 @% o& p! ?
ment of his penis and frequent erections. The child" j* K6 _4 I* G
was the product of a full-term normal delivery, with
$ O U. g. s4 q7 Ea birth weight of 7 lb 14 oz, and birth length of
* ~- r9 b) D" ~& u' E3 t1 T0 Q20 inches. He was breast-fed throughout the first year+ t! A( o0 {/ Y6 a4 z
of life and was still receiving breast milk along with
M+ `2 \' X6 q/ E$ H. |7 ysolid food. He had no hospitalizations or surgery,
7 l6 X4 z4 N& D5 q/ yand his psychosocial and psychomotor development
# M+ _4 O, ]+ w' D2 W/ Dwas age appropriate.9 E5 A9 M( o. J ^4 T- z" A
The family history was remarkable for the father,
1 m. N8 W, l( j" Zwho was diagnosed with hypothyroidism at age 16,) R* ?) T2 L( b6 e
which was treated with thyroxine. The father’s
, E/ F+ @$ _ [height was 6 feet, and he went through a somewhat0 ]$ K# F6 X. ~) T3 {2 |
early puberty and had stopped growing by age 14.& u& ?( [+ H% @; n4 [ e% @; {
The father denied taking any other medication. The
! p( v2 @" A8 L, E" F& ^& I* lchild’s mother was in good health. Her menarche5 e3 I( C; X& F
was at 11 years of age, and her height was at 5 feet
) d/ G# N% \% r2 G* A5 inches. There was no other family history of pre-
+ \8 K! e7 G# e8 q5 Q# A pcocious sexual development in the first-degree rela-9 O8 ~8 M' J0 i% M$ F4 p/ [( V$ ?
tives. There were no siblings." V4 j* R/ T6 ^3 e! }( R, m7 g
Physical Examination& F2 i1 i) D4 J' B( |/ f9 C' u
The physical examination revealed a very active,
8 i- y; {7 b# Aplayful, and healthy boy. The vital signs documented0 h- z- Q) ~8 r; u5 _ A
a blood pressure of 85/50 mm Hg, his length was [) w- w3 V* M$ S& b- r5 d) H
90 cm (>97th percentile), and his weight was 14.4 kg
: i; }+ m' ~; H; W5 k, @(also >97th percentile). The observed yearly growth9 G. z) h" r0 `0 ^& i* K- T7 {
velocity was 30 cm (12 inches). The examination of
! K7 L" p4 D$ M0 [/ lthe neck revealed no thyroid enlargement.
; _- x4 H) g/ w: I7 M1 Z7 _The genitourinary examination was remarkable for7 ?* c0 m3 t/ T f- ]4 S. \- m7 j
enlargement of the penis, with a stretched length of
0 W. C' P* d' m: z; ^: y8 cm and a width of 2 cm. The glans penis was very well
x5 J3 a6 ] g. Ideveloped. The pubic hair was Tanner II, mostly around0 _: L, A/ f- N/ d: \$ \
540* y- }' L: x4 l8 P7 O# J
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, g, g' \9 z5 W. m# F2 C
the base of the phallus and was dark and curled. The
% Q4 ?7 m: ?( l: e. }2 N2 \5 d: n W1 _testicular volume was prepubertal at 2 mL each.% A# Z* q/ v% R: q e! n4 m
The skin was moist and smooth and somewhat
, S, b1 B% u. _7 Doily. No axillary hair was noted. There were no
: E/ Y; P# w- Y: W) {$ i( o, yabnormal skin pigmentations or café-au-lait spots.9 T9 p0 q' @1 V3 r5 X/ p
Neurologic evaluation showed deep tendon reflex 2+! p8 B4 C( H# D% ^4 y+ S
bilateral and symmetrical. There was no suggestion
& v: }( J/ I5 t$ s9 pof papilledema.
' P0 X& N# c, J: ZLaboratory Evaluation5 K' ?$ E' A8 u4 x2 v* T
The bone age was consistent with 28 months by
. p7 `% @2 G( fusing the standard of Greulich and Pyle at a chrono-9 x8 [2 ?* Y1 K4 B5 Z4 C Q' H
logic age of 16 months (advanced).5 Chromosomal# m' [3 `8 U5 ~
karyotype was 46XY. The thyroid function test/ q) }0 s8 T6 D" ~" r) u
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
* d1 K9 V- ~! T" d* Z/ k0 rlating hormone level was 1.3 µIU/mL (both normal).
1 L9 l4 J5 w+ ^* @- @! AThe concentrations of serum electrolytes, blood4 r0 ?, t9 o) R3 k
urea nitrogen, creatinine, and calcium all were
3 X- R, u7 b {* M/ pwithin normal range for his age. The concentration) X# \/ J8 C% V0 q* F2 A4 h' L
of serum 17-hydroxyprogesterone was 16 ng/dL
, z/ {$ L/ ~7 ~1 I( v! r( f# _(normal, 3 to 90 ng/dL), androstenedione was 205 [6 N1 Z, x3 C) e$ N* A1 W) X
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
9 d! J5 A/ K- J' u. ^! Yterone was 38 ng/dL (normal, 50 to 760 ng/dL),
# [2 q: g5 g6 k3 ]8 ~' Xdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
- I$ D. n+ B6 R z; I+ J e49ng/dL), 11-desoxycortisol (specific compound S)) p" [, `3 U! ?9 k% e8 v! d
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-( T, e* [. b$ x
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total- C3 p: I U+ v; A4 Y- _
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
1 G0 B2 S0 e- D* k$ z/ Vand β-human chorionic gonadotropin was less than& ` a' X0 [1 @# K
5 mIU/mL (normal <5 mIU/mL). Serum follicular
9 ^2 S; G' l6 m. ` z z( J( Ystimulating hormone and leuteinizing hormone2 ~# j5 h' R: c4 G. B% Q6 B
concentrations were less than 0.05 mIU/mL
( }' f S4 ?) j1 U% m7 ?: b0 Q3 S(prepubertal).6 |4 o- T: }0 p( ^- G; p
The parents were notified about the laboratory. O. ~( N2 `9 J' |9 S
results and were informed that all of the tests were
$ s( J$ }3 w" anormal except the testosterone level was high. The1 w: F7 Y3 O2 ?1 R1 ~
follow-up visit was arranged within a few weeks to
+ r# f& ]' i- {" x) H& ^obtain testicular and abdominal sonograms; how-
# D) O4 x$ s$ Iever, the family did not return for 4 months.+ X9 N8 P- U$ y
Physical examination at this time revealed that the
) v" [& O. o& g4 cchild had grown 2.5 cm in 4 months and had gained$ @# ]' e3 ]8 k+ Z* h- u
2 kg of weight. Physical examination remained
L3 T! _8 V+ w) {1 ~unchanged. Surprisingly, the pubic hair almost com-$ ?; R& g9 A% S
pletely disappeared except for a few vellous hairs at& X1 M; D! B: W# ^" H$ _- V5 J& g* J
the base of the phallus. Testicular volume was still 2
0 p1 \5 h5 J+ o' \+ L$ J! x cmL, and the size of the penis remained unchanged.& g: X( i( u$ \' o, C
The mother also said that the boy was no longer hav-6 b a% M: d$ L7 h% C' Y1 h
ing frequent erections.3 G6 M3 u4 u4 t |7 I- l( Y
Both parents were again questioned about use of
: t1 W1 [) `. ~! @, P0 Z8 `any ointment/creams that they may have applied to: b( g2 N$ P' E: k1 n- _, n* C
the child’s skin. This time the father admitted the8 I& O+ O' t# w! y
Topical Testosterone Exposure / Bhowmick et al 5413 y1 n0 e0 m9 \/ c; [
use of testosterone gel twice daily that he was apply-6 S3 w4 U- R! V4 z3 Q0 P! K
ing over his own shoulders, chest, and back area for
& M9 ~8 c+ k. Q. l8 \" [4 L3 N) _a year. The father also revealed he was embarrassed) B0 H9 q9 O6 r5 c
to disclose that he was using a testosterone gel pre-
# y+ W0 c6 A! p, }scribed by his family physician for decreased libido1 Z/ @7 n. p) C3 s, G9 C3 b5 A
secondary to depression.4 D+ z, p5 b r# o
The child slept in the same bed with parents.$ B4 V( T' q2 n$ _( ]
The father would hug the baby and hold him on his
2 r- R" F9 ?, g; E6 l# ^chest for a considerable period of time, causing sig-# O: d3 h$ l/ M- c7 m
nificant bare skin contact between baby and father.* k0 \- H9 g. v, u
The father also admitted that after the phone call,
( [* J* P G* G8 [when he learned the testosterone level in the baby; L% {4 x4 ^2 s
was high, he then read the product information% B% y. Z0 s1 T" S. G
packet and concluded that it was most likely the rea-" G F- X- n+ Q. G3 G0 e% _) M
son for the child’s virilization. At that time, they0 J% o M# e; _, i/ o; O" r7 {
decided to put the baby in a separate bed, and the5 e. ?) c. I O# X F$ l" T8 g4 z
father was not hugging him with bare skin and had
8 b( P2 T/ E3 _: v t- N. a, nbeen using protective clothing. A repeat testosterone9 }7 ~+ R/ k$ |' |! i$ C
test was ordered, but the family did not go to the
' ^0 ` s7 S# r3 ~1 ^8 d6 Vlaboratory to obtain the test.1 s. z X4 W( D j
Discussion- t: Y; P$ N5 u$ k, ]
Precocious puberty in boys is defined as secondary
7 [8 d( c& i6 Qsexual development before 9 years of age.1,4
% y3 e+ c0 g' q, | d3 W) jPrecocious puberty is termed as central (true) when v H( n0 |. Z8 v, T- w$ m
it is caused by the premature activation of hypo-
. r9 M& g4 s9 ]- R8 X1 tthalamic pituitary gonadal axis. CPP is more com-# s2 I8 D/ H* u9 \: x2 X) B
mon in girls than in boys.1,3 Most boys with CPP
7 w3 ]8 @' Q) W& e: {may have a central nervous system lesion that is! J2 Z+ N4 |& N
responsible for the early activation of the hypothal-
! Q- C8 w0 z }: ?& O" Bamic pituitary gonadal axis.1-3 Thus, greater empha- _* z6 y, }( D7 j3 x! J" N
sis has been given to neuroradiologic imaging in
5 e. k1 s& j5 U/ P, S; P( Lboys with precocious puberty. In addition to viril-
( k$ `( m w3 Z/ h7 g |7 Oization, the clinical hallmark of CPP is the symmet-
" r1 o M" g. t1 U6 _rical testicular growth secondary to stimulation by
a7 D+ `3 q: @) D8 }4 w( m: Tgonadotropins.1,33 I) K% N, ~. V4 X5 j" V0 V
Gonadotropin-independent peripheral preco-% w4 p; S. y- g/ @$ E
cious puberty in boys also results from inappropriate
% ^& N! P1 d2 {* G2 F; S) J+ b$ _7 `androgenic stimulation from either endogenous or
3 z- v& ]% H$ }: jexogenous sources, nonpituitary gonadotropin stim-
1 i' M+ V& q9 u: e, ]ulation, and rare activating mutations.3 Virilizing
4 R% N' T& g: r) ?congenital adrenal hyperplasia producing excessive
6 \% V j3 `% S- C" r# N' N Fadrenal androgens is a common cause of precocious
7 C9 M- ^: z/ H2 z8 I! Ipuberty in boys.3,4
4 e0 u2 e- r" }5 |! o; m) ^The most common form of congenital adrenal# h3 `: U; B& ?5 d' G2 _8 y* J! D
hyperplasia is the 21-hydroxylase enzyme deficiency.
/ n5 }% S5 O( k; QThe 11-β hydroxylase deficiency may also result in
" [4 ], F. ?* p0 ~excessive adrenal androgen production, and rarely,0 W% R3 B4 x- i0 c
an adrenal tumor may also cause adrenal androgen
& T- g; \# l6 u0 _( E6 h: T; Vexcess.1,3) P4 h z( ^; y) C9 l" z3 G0 Q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 r& ?( J+ ?2 C+ L r
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
+ `' }4 i1 Y( o& `) YA unique entity of male-limited gonadotropin-
9 w# f3 j7 U/ o( Uindependent precocious puberty, which is also known
# f+ n$ ^( z: U) Q1 k6 `as testotoxicosis, may cause precocious puberty at a8 ^; O5 m6 ^ [- \7 {! I( W
very young age. The physical findings in these boys
% i9 V8 Q/ y4 \. B- J4 T K7 cwith this disorder are full pubertal development,
( ~' B" ~9 m2 \8 p# b9 C' Qincluding bilateral testicular growth, similar to boys
* N: ^" K0 z; v9 ]' owith CPP. The gonadotropin levels in this disorder
2 N& Z1 o O8 H& ]! F! v7 iare suppressed to prepubertal levels and do not show
; P1 o* `6 g- @ d9 Hpubertal response of gonadotropin after gonadotropin-$ s: U; I8 c( d3 E9 K2 M; V
releasing hormone stimulation. This is a sex-linked
6 ^/ Y+ G( r1 l7 k* tautosomal dominant disorder that affects only2 _( o @" o7 {0 |# a, S' F Z( s% {
males; therefore, other male members of the family
, \/ ]3 c- g9 s9 ^* ]2 Kmay have similar precocious puberty.31 [' q! G: n9 \9 T
In our patient, physical examination was incon-
% Q4 E$ ^6 ?" i/ O7 x! D0 [; qsistent with true precocious puberty since his testi-
( s% q% r' V/ ?" _4 ecles were prepubertal in size. However, testotoxicosis
/ T4 T. a7 E9 y1 dwas in the differential diagnosis because his father
5 P" W. x8 ^0 q: ]started puberty somewhat early, and occasionally,4 ]2 e! x7 [: k$ ^. z
testicular enlargement is not that evident in the( O+ ^: L: y7 G4 R& g/ a& T' E. r
beginning of this process.1 In the absence of a neg-
3 b5 W: U9 n s2 z. q% Uative initial history of androgen exposure, our
( M6 K& R$ Z1 Obiggest concern was virilizing adrenal hyperplasia,
8 F: V! j* M! R) I: H* _either 21-hydroxylase deficiency or 11-β hydroxylase
5 t" o7 m" _* y4 b# h- o3 T8 Hdeficiency. Those diagnoses were excluded by find-/ R M9 k* e3 u0 N# d- N
ing the normal level of adrenal steroids.
q4 ~; q3 G- F8 jThe diagnosis of exogenous androgens was strongly8 N& R% u7 c# Q) R7 j7 g
suspected in a follow-up visit after 4 months because
; ?+ N: {5 k& f$ _the physical examination revealed the complete disap-6 w( l/ E/ t' D6 F
pearance of pubic hair, normal growth velocity, and+ t" j2 f- J" X
decreased erections. The father admitted using a testos-& ?7 G% s9 f9 V% `2 I
terone gel, which he concealed at first visit. He was2 F$ c4 p) ~" \6 L5 \
using it rather frequently, twice a day. The Physicians’6 S) x# w$ M" B- {3 }4 f8 }
Desk Reference, or package insert of this product, gel or
( U8 y3 v0 n$ y* W; b" _8 Vcream, cautions about dermal testosterone transfer to* L' X; a3 j- |' k& S% M* N
unprotected females through direct skin exposure.
- K6 W0 {: m; G' o: S+ uSerum testosterone level was found to be 2 times the
! u- z% s( {$ B# V# i `baseline value in those females who were exposed to
' b: p1 v8 S; Q" A- b- w- Xeven 15 minutes of direct skin contact with their male+ o/ S0 [$ O! b( t/ m
partners.6 However, when a shirt covered the applica-
. Y# C2 i3 K A3 _* C; J* r8 t% R2 K# Stion site, this testosterone transfer was prevented.! C% h9 J0 h* n" |/ k, w8 Y, w. ?1 h
Our patient’s testosterone level was 60 ng/mL,+ z `+ w/ {2 O* S7 i7 j& G1 e E# ]
which was clearly high. Some studies suggest that
; x6 v1 a$ P" K% Gdermal conversion of testosterone to dihydrotestos-
1 `# e/ C, \, C( _terone, which is a more potent metabolite, is more; m+ R. X4 y- |
active in young children exposed to testosterone
6 Z1 o2 ^( L) D' a) m7 B* j5 F8 oexogenously7; however, we did not measure a dihy-
) H3 G0 g- x" C( tdrotestosterone level in our patient. In addition to
& y+ ?6 x5 E d8 Svirilization, exposure to exogenous testosterone in
# m8 G- B( m, b) v( y { Pchildren results in an increase in growth velocity and
6 k% m6 b5 d. a' @: cadvanced bone age, as seen in our patient.
+ \6 Z5 t" H4 z. J' O0 ~3 RThe long-term effect of androgen exposure during8 q( r0 D( G* n% o; t8 E/ ?
early childhood on pubertal development and final
+ w1 `) X: _' r0 u/ n% yadult height are not fully known and always remain3 g& C: i+ {5 V
a concern. Children treated with short-term testos-
% L5 D: {) z$ Q3 v# M( jterone injection or topical androgen may exhibit some. j( b" g* a4 T
acceleration of the skeletal maturation; however, after. L8 }* n* K& z9 d0 x/ M
cessation of treatment, the rate of bone maturation! I. P# u- ^& q' c
decelerates and gradually returns to normal.8,9
( q7 |+ v/ N6 R+ M: a7 `2 V1 BThere are conflicting reports and controversy# F% p# {% A7 K A/ n
over the effect of early androgen exposure on adult
`, [+ O& K) |$ o) P& mpenile length.10,11 Some reports suggest subnormal
$ E, n$ P) H: R% m/ u& \0 g+ Xadult penile length, apparently because of downreg-5 O1 J& p z4 `# y8 n' J N/ H& d* l
ulation of androgen receptor number.10,12 However,
+ y: i, r- `5 |- ASutherland et al13 did not find a correlation between( s- c z5 Z Q4 N% i( u
childhood testosterone exposure and reduced adult7 i# w6 ^, d- G* v6 X4 R
penile length in clinical studies.
0 B4 @! l! e# Y0 }- I& U) t) A2 U# xNonetheless, we do not believe our patient is
( u/ I3 E3 S1 O% Y/ [going to experience any of the untoward effects from
+ {+ V M! M, |" c- e( |testosterone exposure as mentioned earlier because$ _& `- {" n( G% D( S+ a) {1 d
the exposure was not for a prolonged period of time.- G# n7 L4 s. B y5 _* [
Although the bone age was advanced at the time of
, w* l3 }8 n9 l3 _diagnosis, the child had a normal growth velocity at
, V( D" }) |- `the follow-up visit. It is hoped that his final adult
* s- G- {" G$ x' k6 r+ Xheight will not be affected.
. D: z$ k! p* D2 Q0 z! G+ h0 [Although rarely reported, the widespread avail-" V$ ~2 W: F3 z$ A( o8 ^6 {4 [; ]" ~
ability of androgen products in our society may
4 m" H' O7 I$ I8 nindeed cause more virilization in male or female
! O% h& w: u, @9 M X6 gchildren than one would realize. Exposure to andro-
$ a, ~ u$ ]8 K# Qgen products must be considered and specific ques-. i! }6 d' F' V% C3 X
tioning about the use of a testosterone product or$ \9 a, h7 H- n$ Y" @4 J* Z0 u
gel should be asked of the family members during
- Q |0 e5 M3 I8 a- m. Wthe evaluation of any children who present with vir-
2 I. S5 M2 b$ E4 z/ t j* Lilization or peripheral precocious puberty. The diag-
0 }" V5 R1 r f1 Anosis can be established by just a few tests and by5 x- M ?9 e: U) O. v
appropriate history. The inability to obtain such a0 E- c; Q8 K# z8 F7 m& ^! q1 f
history, or failure to ask the specific questions, may. h, v' }. h( c( ~( }" [
result in extensive, unnecessary, and expensive' s4 z7 O( {0 R) U$ O
investigation. The primary care physician should be) e9 O5 y9 W+ \" X; u9 m. g* [
aware of this fact, because most of these children
8 K5 v6 F9 S# } E! Umay initially present in their practice. The Physicians’' _5 X! j- ?% H5 M, z$ \" n
Desk Reference and package insert should also put a
' A( z+ c% }& |3 ]1 t/ hwarning about the virilizing effect on a male or" U) v( l. q* V8 G' m, g
female child who might come in contact with some-
3 a6 J3 B6 L: M' u! qone using any of these products.
8 x4 n) L( @" c2 OReferences7 N4 _" E4 ?& J' B3 _
1. Styne DM. The testes: disorder of sexual differentiation
) r* L: [- O5 L6 [& b k' qand puberty in the male. In: Sperling MA, ed. Pediatric
) ?0 @2 k; l9 g2 MEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;& _! y+ h- H' S: I! Y% _2 z
2002: 565-628.
( U m' |/ z- @2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious% Q9 ] R/ t; v9 `' P$ ?
puberty in children with tumours of the suprasellar pineal
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+ V2 s. |& V# B t/ s' aareas: organic central precocious puberty. Acta Paediatr.
) j0 ^5 u% H" P2 D1 p p2001;90:751-756./ P' d. |5 L/ n! k( l
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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/ [' S. {2 D. B" G9 b7 _, ZDekker Inc; 2003:211-238.
1 @8 }, R8 n( p; O4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
. A0 s, j, f Y4 U' A* a% vdevelopment in a two-year-old boy induced by topical
5 m9 B- r' }! U% j4 aexposure to testosterone. Pediatrics. 1999;104:e23.: j$ v5 y- P0 A
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
& E3 \/ Z2 x6 X5 H7 M, X' L; [Skeletal Development of the Hand and Wrist. 2nd ed.
. }; o9 G" e1 S5 O: g8 rStanford, CA: Stanford University Press; 1959.
$ O$ P3 ^2 J3 ~; B' a6. Physicians’ Desk Reference. Androgel 1% testosterone,
: B$ n: j2 ]* K6 H p0 IUnimed Pharmaceutical Inc. Montvale, NJ: Medical0 l* S. J( {% i6 x$ D1 a& Q
Economics Company, Inc; 2004:3239-3241.! V; s- e' v4 K0 Z
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