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is a significant concern for physicians. Central8 v3 }8 [' ]0 J& |
precocious puberty (CPP), which is mediated
& ^! r0 Y! g6 q Sthrough the hypothalamic pituitary gonadal axis, has
* Q" b! O" b+ E C2 E# q& Z' la higher incidence of organic central nervous system
* U# q# h) D5 q- Ylesions in boys.1,2 Virilization in boys, as manifested
5 ~! R( ~9 g# }' S9 e0 I% Q7 V$ P+ _6 bby enlargement of the penis, development of pubic# y6 K: H: `8 m9 V' n
hair, and facial acne without enlargement of testi-
; _1 K% P9 T9 J1 {' V' }3 [2 _cles, suggests peripheral or pseudopuberty.1-3 We7 k: C+ N9 V: c: J* q! H: s
report a 16-month-old boy who presented with the
y( b5 P+ G7 Venlargement of the phallus and pubic hair develop-3 c v4 A, A9 Z+ r+ U2 V m% A5 g0 m
ment without testicular enlargement, which was due& L, l2 v% b' T' E
to the unintentional exposure to androgen gel used by
) ?5 i2 N( Q: g) }the father. The family initially concealed this infor-" m+ E5 |) r" a& b, O8 ?! u
mation, resulting in an extensive work-up for this
' {0 C2 O) ~" M6 H; ~; X; Ychild. Given the widespread and easy availability of
6 W0 U7 i* n; |# ]testosterone gel and cream, we believe this is proba-) c$ {: L# O3 I
bly more common than the rare case report in the
! G5 l" M5 H: R0 [5 zliterature.4! T+ K+ _. }4 m6 t# y5 ~
Patient Report2 O% X5 b P4 t0 b! S
A 16-month-old white child was referred to the! z6 \5 S: N9 T/ g8 T
endocrine clinic by his pediatrician with the concern
\2 u. ~4 K* q$ P( E& I1 eof early sexual development. His mother noticed- v7 X/ u) _$ n' {; ?- N
light colored pubic hair development when he was6 a7 O0 }/ ^! G E4 @# H
From the 1Division of Pediatric Endocrinology, 2University of
6 k2 J! x# c$ G* j5 _) n9 WSouth Alabama Medical Center, Mobile, Alabama.4 Q3 `: Z7 v4 _, ^
Address correspondence to: Samar K. Bhowmick, MD, FACE,
( W M+ O9 ?6 V! }1 ]5 ~/ ~Professor of Pediatrics, University of South Alabama, College of# ]6 C; y- p2 C V& A! ?3 F5 b8 S
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
4 F% Y5 n+ K/ Y4 c5 N# He-mail: [email protected].) r0 P) d0 T# ~# i- Q
about 6 to 7 months old, which progressively became0 D+ u; W9 x& E$ K0 J2 `
darker. She was also concerned about the enlarge-+ \5 d; h9 P% o1 _- R6 p
ment of his penis and frequent erections. The child, `2 R* k7 T0 I" C' K1 J
was the product of a full-term normal delivery, with+ o( | Z3 m$ z7 k
a birth weight of 7 lb 14 oz, and birth length of
7 L) U z& J/ f20 inches. He was breast-fed throughout the first year
% G2 f% A9 v9 l6 G& g0 s L4 {of life and was still receiving breast milk along with$ P' z5 L5 ^. d5 ^
solid food. He had no hospitalizations or surgery,5 s: T4 m/ P( X. S9 P: P$ _2 Y
and his psychosocial and psychomotor development3 u" N* I, |7 z' I# D7 N3 E: [
was age appropriate., F& R5 v: f" H
The family history was remarkable for the father,
6 K: Y- z" n1 _1 Rwho was diagnosed with hypothyroidism at age 16,
: Y* g2 {: @0 |. a. W: a% j. s/ R; fwhich was treated with thyroxine. The father’s, q3 V( K/ ^' Y0 @3 I
height was 6 feet, and he went through a somewhat- m2 t$ k+ _# H8 x4 C
early puberty and had stopped growing by age 14.
, @5 F# s% f5 i$ j$ {- LThe father denied taking any other medication. The2 I! M/ e8 t: _5 i9 U* |
child’s mother was in good health. Her menarche! X" g$ {7 h) F+ ]) p5 Z; C. A' f
was at 11 years of age, and her height was at 5 feet
. M& }1 M+ P+ p `1 B5 inches. There was no other family history of pre-
; G: n$ h9 b' ^cocious sexual development in the first-degree rela-+ ~' Z8 ^' l6 w' A
tives. There were no siblings.6 @7 t/ }: O6 T
Physical Examination
1 ~# y6 Y* H; q& `, E$ EThe physical examination revealed a very active,
0 D! U( p6 G% ` d1 {0 hplayful, and healthy boy. The vital signs documented
4 X9 B2 L, c1 f: `/ l& ga blood pressure of 85/50 mm Hg, his length was
* l% B5 G. J7 g) p& f1 z90 cm (>97th percentile), and his weight was 14.4 kg& {1 X3 @/ i5 C# d
(also >97th percentile). The observed yearly growth/ Q* ]! z3 o y1 O2 z4 I3 X
velocity was 30 cm (12 inches). The examination of
, ~9 h8 ]* D( u: O$ {; |( s9 c! sthe neck revealed no thyroid enlargement.) H+ h9 ^5 T1 _) J2 s y" F
The genitourinary examination was remarkable for: N- _) S1 F7 S# k! R
enlargement of the penis, with a stretched length of
! S! l# I4 q& G. _8 O8 cm and a width of 2 cm. The glans penis was very well
# s' N4 S/ H2 Ddeveloped. The pubic hair was Tanner II, mostly around" j0 |; m m b5 }7 {
540% x# b8 ?' j/ v
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: }8 \2 x. M1 {the base of the phallus and was dark and curled. The2 D! t5 N$ c( ?% q
testicular volume was prepubertal at 2 mL each.. b- J5 T& m" ^
The skin was moist and smooth and somewhat' I3 I# P6 R* Y4 i, C5 ^
oily. No axillary hair was noted. There were no8 x+ [( R/ Z; C* M
abnormal skin pigmentations or café-au-lait spots.; U. Z6 B5 g8 I2 L* e. e& H
Neurologic evaluation showed deep tendon reflex 2+
$ j6 X( {# E6 R* i1 U1 Rbilateral and symmetrical. There was no suggestion' r3 o! H9 H+ H5 o) p
of papilledema.( |2 o6 X0 i, N$ p
Laboratory Evaluation7 n7 f% P. L) F3 d; Q l1 x% z" d
The bone age was consistent with 28 months by
|0 [4 T5 M2 I" vusing the standard of Greulich and Pyle at a chrono-
% @: c' ?# @& r1 [8 nlogic age of 16 months (advanced).5 Chromosomal
; e; K- u- B5 s" U1 Ukaryotype was 46XY. The thyroid function test" f' n8 _& I4 X* W6 U2 H
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
9 v: t! r: @( `4 F! S1 W( |1 Zlating hormone level was 1.3 µIU/mL (both normal).
4 M5 J6 q& [; u' {The concentrations of serum electrolytes, blood% }2 b1 l7 X; W+ u# _' a7 z H1 e
urea nitrogen, creatinine, and calcium all were1 _6 \# X3 D. W+ F* z- y
within normal range for his age. The concentration
# ]5 B7 J6 t( P5 p5 T+ Cof serum 17-hydroxyprogesterone was 16 ng/dL
* f3 t# G0 G+ E/ H4 I. l/ P(normal, 3 to 90 ng/dL), androstenedione was 20. y. ^* @' z) Z! l3 l; M
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-& T$ f1 T* ?1 g$ J0 t2 B
terone was 38 ng/dL (normal, 50 to 760 ng/dL),% m9 b6 b8 u: Q4 J) g
desoxycorticosterone was 4.3 ng/dL (normal, 7 to8 k7 h0 N4 I8 y
49ng/dL), 11-desoxycortisol (specific compound S): _1 J& w+ M0 D; Z5 H" e( d' N6 T. H
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-# f( [0 O. P, L$ ^. X
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total8 W/ A: v7 n5 ?
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
+ X t& T2 j# V! ^. H0 t- X' Land β-human chorionic gonadotropin was less than1 `4 p' g9 D- ^( H8 g
5 mIU/mL (normal <5 mIU/mL). Serum follicular
1 m' @ `% p9 F3 ~; qstimulating hormone and leuteinizing hormone7 {, p, |4 d; l6 c7 U$ L. F
concentrations were less than 0.05 mIU/mL
: v3 J/ {6 s8 F/ e(prepubertal).
/ |1 d5 w1 F- \, n9 w1 sThe parents were notified about the laboratory* H( W f! G$ p* l. z7 Q/ L( [# I
results and were informed that all of the tests were
0 c& T, _8 X5 R g9 I4 Wnormal except the testosterone level was high. The8 N3 ]0 e0 U8 b- Q; N
follow-up visit was arranged within a few weeks to5 r3 ?8 R9 \' I$ M I d
obtain testicular and abdominal sonograms; how-& @7 M/ R6 [6 V* W& g2 q
ever, the family did not return for 4 months.. ~% E5 I1 t5 t+ f4 b
Physical examination at this time revealed that the
6 w$ o' T! U9 M! S Jchild had grown 2.5 cm in 4 months and had gained
+ z Z% L$ }, L0 ?6 J( |2 kg of weight. Physical examination remained; P0 P- `0 p" K5 {
unchanged. Surprisingly, the pubic hair almost com-7 q, j9 |9 i0 w3 H
pletely disappeared except for a few vellous hairs at2 E& @9 b& o: _1 Q, l# Q
the base of the phallus. Testicular volume was still 2
! j% p5 _( H$ l% w( m0 x0 o& YmL, and the size of the penis remained unchanged.% g( M: z; p4 j& m
The mother also said that the boy was no longer hav-3 C+ T, f4 [, z2 X
ing frequent erections.
) n" ]* t) G" C, L6 sBoth parents were again questioned about use of
% Q" F- C4 [/ L( C, x" u4 ?& w' Vany ointment/creams that they may have applied to
: C& ?/ Q; a* a3 z' y; U" Mthe child’s skin. This time the father admitted the
" U. D3 v! M6 z% [2 E9 n. lTopical Testosterone Exposure / Bhowmick et al 541. J# y: ~2 |! h# P7 f3 b4 y, C
use of testosterone gel twice daily that he was apply-3 I f+ F6 N9 `2 _/ y) z
ing over his own shoulders, chest, and back area for& W4 F) y1 _1 A
a year. The father also revealed he was embarrassed
0 [: k0 j0 x5 e4 b1 J' B$ G7 gto disclose that he was using a testosterone gel pre-
( N! J2 m) k* i9 W3 S3 Jscribed by his family physician for decreased libido
$ z& d; v+ c4 S0 Asecondary to depression.. O- N" @& Q7 r: ~* H1 y# f
The child slept in the same bed with parents.
4 Z2 [ d7 i/ Q2 ^$ s: u* x+ VThe father would hug the baby and hold him on his
. M0 C0 i! c& P- Uchest for a considerable period of time, causing sig-& o" q* K7 p; G2 [
nificant bare skin contact between baby and father.
3 ^1 W; \) X& U# a( B1 PThe father also admitted that after the phone call,3 X& P' H b/ m
when he learned the testosterone level in the baby) S% U1 u% \" B# I0 X
was high, he then read the product information
! O7 s( H* D8 `6 h$ B. T0 }6 fpacket and concluded that it was most likely the rea-, T- t: I+ R! F9 Z4 ~9 D. X
son for the child’s virilization. At that time, they
6 x& Y1 X7 E; \) S- Kdecided to put the baby in a separate bed, and the$ N5 u* R" {7 C+ |
father was not hugging him with bare skin and had
# U+ z- \: Q/ ~# a0 K+ Q# f9 T wbeen using protective clothing. A repeat testosterone
% h4 \' h& N7 H; z, P' [0 ftest was ordered, but the family did not go to the
' K1 P$ l( z, q! y: Z; Dlaboratory to obtain the test.
+ Q6 x/ [% A. ?Discussion
) B4 t9 I7 M6 D0 d0 b) DPrecocious puberty in boys is defined as secondary/ j# m! r# Q( ?
sexual development before 9 years of age.1,4 f; R2 m& J/ R6 A" Q
Precocious puberty is termed as central (true) when) a0 v& K' Y9 l4 P) z7 E# ~
it is caused by the premature activation of hypo-
' V. I5 o2 @3 E) b( ?7 [( f. ^thalamic pituitary gonadal axis. CPP is more com-4 R T& r! ~4 ]/ Q+ @$ \3 k
mon in girls than in boys.1,3 Most boys with CPP( E- r$ T2 o9 v4 U$ H/ S# m
may have a central nervous system lesion that is: x) [% t2 G. [
responsible for the early activation of the hypothal-
* G3 y# K5 K( B: g* Famic pituitary gonadal axis.1-3 Thus, greater empha-
, S7 v9 w$ S& E7 I1 jsis has been given to neuroradiologic imaging in
" K1 H; L/ ?" K* B- W4 gboys with precocious puberty. In addition to viril-$ K4 q6 H0 ]5 T, G1 o9 _
ization, the clinical hallmark of CPP is the symmet-
\; Q* S3 M* ~; [/ k+ d6 Mrical testicular growth secondary to stimulation by
5 z5 ]$ f$ {6 ?* Rgonadotropins.1,3! U5 ~% J3 j6 Z* B/ X) A A' ^
Gonadotropin-independent peripheral preco-
! _# W0 @, A4 k) Bcious puberty in boys also results from inappropriate7 ?/ Q" g2 J- C5 M1 P! t( V
androgenic stimulation from either endogenous or
O1 P$ V& W! a" W: Kexogenous sources, nonpituitary gonadotropin stim-7 k( n- G- L; d% c1 K4 [9 V8 }: h
ulation, and rare activating mutations.3 Virilizing+ X8 N9 S0 j$ Z4 P1 S" ?
congenital adrenal hyperplasia producing excessive
, m0 x$ c. i8 P6 a0 Jadrenal androgens is a common cause of precocious
% [ J( g6 \" V7 Hpuberty in boys.3,4$ E$ x) E' W5 d; f, p4 n+ D
The most common form of congenital adrenal
4 Q3 C. i5 k5 V }) `6 |( ?; whyperplasia is the 21-hydroxylase enzyme deficiency.
1 @. Z7 H6 q1 r" @The 11-β hydroxylase deficiency may also result in
3 I/ G) L' i' c3 ?8 V% eexcessive adrenal androgen production, and rarely,5 r* l& m/ w# K; L" V; G0 f
an adrenal tumor may also cause adrenal androgen
6 W) P$ j: ^7 e/ C# P" Bexcess.1,3. [# K* Z8 s e) }& o- S+ n
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from# L9 m; ^+ A) o3 A4 _+ G$ h
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
7 I& f% X) S$ r. i j/ h( eA unique entity of male-limited gonadotropin-
+ ?: n) R3 T* i9 J2 q( Dindependent precocious puberty, which is also known# u2 ?0 K9 p7 J# s3 [! T
as testotoxicosis, may cause precocious puberty at a* s- v9 S- I8 U! I% R
very young age. The physical findings in these boys
5 U6 h( L/ f' b8 Mwith this disorder are full pubertal development,
& { w3 e. G7 `/ dincluding bilateral testicular growth, similar to boys
# g p/ q5 N# Uwith CPP. The gonadotropin levels in this disorder) ?4 L' o5 t: H/ f% o6 }
are suppressed to prepubertal levels and do not show: O6 h5 b4 I' t$ t, j3 c
pubertal response of gonadotropin after gonadotropin-9 w+ e. T( O: r+ b* J9 Q
releasing hormone stimulation. This is a sex-linked
1 \7 A+ e, h8 ]' o# y4 O9 W4 y" Zautosomal dominant disorder that affects only
/ N8 R. T' `! h+ kmales; therefore, other male members of the family
3 C& B' G: y7 |may have similar precocious puberty.3
1 b( O6 Y) {0 `+ Q' ]' N8 |In our patient, physical examination was incon-
8 {' t: F& q8 n: C' }! jsistent with true precocious puberty since his testi-$ h. V8 \7 k4 h! H8 b) i( p
cles were prepubertal in size. However, testotoxicosis
: D, _% Y$ d" H# \* o+ U: lwas in the differential diagnosis because his father
7 }- z5 a) a% u6 t9 m4 Hstarted puberty somewhat early, and occasionally,
4 D$ t9 U6 E' j; i! k) N6 Stesticular enlargement is not that evident in the. g) q& S! H* I+ i
beginning of this process.1 In the absence of a neg-
- w; W1 E2 J0 V$ D, yative initial history of androgen exposure, our
! i4 V% F, e; h) Qbiggest concern was virilizing adrenal hyperplasia,
" X9 A: M9 p7 h4 Neither 21-hydroxylase deficiency or 11-β hydroxylase
9 _2 M# C) k& n/ |deficiency. Those diagnoses were excluded by find-
7 m* S6 g) v1 Y! ]1 L* V5 aing the normal level of adrenal steroids.+ ~; k/ R3 F+ b/ \2 M2 j4 f
The diagnosis of exogenous androgens was strongly
* U9 I# P# ~, V" bsuspected in a follow-up visit after 4 months because8 g b$ p4 {& r! N
the physical examination revealed the complete disap-
% b" b2 [# \5 I9 G* r) ~2 t: tpearance of pubic hair, normal growth velocity, and
7 J+ w9 C5 W8 b9 O; h5 Mdecreased erections. The father admitted using a testos-. ~' q+ y4 ?( U5 {4 K' w
terone gel, which he concealed at first visit. He was/ k! c8 `% E3 t0 N( P" R
using it rather frequently, twice a day. The Physicians’# J0 {2 s1 d5 i
Desk Reference, or package insert of this product, gel or% W8 u3 p; k- S4 J1 y8 U2 W% o
cream, cautions about dermal testosterone transfer to
/ p5 _( l) Z9 g W- nunprotected females through direct skin exposure.2 E' }% J' s/ ~# L
Serum testosterone level was found to be 2 times the
; [3 R) Y* R5 cbaseline value in those females who were exposed to- ^5 G( I, }2 |2 {% R9 K
even 15 minutes of direct skin contact with their male' n) u5 w6 S! |! X% X" W
partners.6 However, when a shirt covered the applica-
* W, A1 Y& G1 p' Stion site, this testosterone transfer was prevented.5 ?7 v" _0 i% C N, F; Q
Our patient’s testosterone level was 60 ng/mL,
, X. u! d+ A# @( B9 cwhich was clearly high. Some studies suggest that
- C, y Q B0 z. _* ` L+ \7 tdermal conversion of testosterone to dihydrotestos-" p6 m" ^! u4 l3 `# I8 _! f3 R
terone, which is a more potent metabolite, is more
4 }2 f( @: X: L, x. x, aactive in young children exposed to testosterone: z7 Z- Y# d4 r7 F2 j9 q
exogenously7; however, we did not measure a dihy-
0 X2 E2 J% t' D3 H" Ndrotestosterone level in our patient. In addition to
" f/ w; R2 J) f6 kvirilization, exposure to exogenous testosterone in! H8 c- K1 a9 x% Y( j* b, j4 [
children results in an increase in growth velocity and
" ~7 f" z1 `+ D% Dadvanced bone age, as seen in our patient.
3 f0 d5 [/ H( q; H' X9 v% xThe long-term effect of androgen exposure during+ W: z& i- [! b0 ^. P, d4 k' y
early childhood on pubertal development and final
6 L) ^. h3 q) S9 D( N6 Wadult height are not fully known and always remain( v! S2 L" D) Z, q, a1 ~
a concern. Children treated with short-term testos-% ?. q X8 { I; E. w* ~
terone injection or topical androgen may exhibit some
8 I. X, l: g' e# I& U+ f" Wacceleration of the skeletal maturation; however, after' A6 X2 g8 k7 c3 O; y2 I4 ]
cessation of treatment, the rate of bone maturation) K' ^! I" G2 f' R3 Q
decelerates and gradually returns to normal.8,99 C+ I' ]7 C$ c
There are conflicting reports and controversy( Z2 \7 Y" P. X6 q' Y: C6 D
over the effect of early androgen exposure on adult8 _3 n5 Y( G6 K- f& @9 `
penile length.10,11 Some reports suggest subnormal
2 W! |6 P" @) s8 ?+ uadult penile length, apparently because of downreg-# M0 e) ~ g% a8 p
ulation of androgen receptor number.10,12 However,* X. R$ t* d9 s5 r; M. v
Sutherland et al13 did not find a correlation between0 F6 O3 S$ i# q! E
childhood testosterone exposure and reduced adult4 o# Y- m$ \& O( d
penile length in clinical studies./ r- P0 W$ i. |/ ]5 [7 }
Nonetheless, we do not believe our patient is8 z8 \) a# T) O3 b
going to experience any of the untoward effects from1 K1 r8 W- c( G/ O, ], m2 c {% k
testosterone exposure as mentioned earlier because
% y; ^* h* ? w* u$ Nthe exposure was not for a prolonged period of time.
8 w* \+ X5 n# K e4 a' L. ~Although the bone age was advanced at the time of
4 I# r3 }+ h) [! N" B5 }9 u. Sdiagnosis, the child had a normal growth velocity at* l7 }/ J% V# ^6 O. o
the follow-up visit. It is hoped that his final adult8 `4 u6 W z, n0 O) n5 R
height will not be affected.
% n) T5 l! r7 ^6 GAlthough rarely reported, the widespread avail-
# G! e% ~/ O+ q% t0 rability of androgen products in our society may0 \4 J/ l0 Z7 Q" Y& i) V3 ?9 o
indeed cause more virilization in male or female
3 I- _. A5 i, q2 xchildren than one would realize. Exposure to andro-
5 B% M7 E1 o% Ngen products must be considered and specific ques-
" b9 U9 N8 L" [" p) k' P4 l, c: Ntioning about the use of a testosterone product or7 q+ B" q0 n0 M9 i
gel should be asked of the family members during. r% `/ v" P8 B$ I7 j1 w
the evaluation of any children who present with vir-6 b) U3 R& f* @" d9 G7 N+ ?
ilization or peripheral precocious puberty. The diag-7 c: ?9 L$ T& L+ c! Y
nosis can be established by just a few tests and by
0 y% j: x- ~ zappropriate history. The inability to obtain such a
$ C* i n- L. e, H* vhistory, or failure to ask the specific questions, may
# i# g/ r3 ~3 q# Bresult in extensive, unnecessary, and expensive) j) J1 ]6 E3 O9 x( a
investigation. The primary care physician should be6 M, [/ p8 L. A0 z: ]. h
aware of this fact, because most of these children
/ s% L1 q% {% k4 e! i8 h# y" Cmay initially present in their practice. The Physicians’) P! E! [) i7 i( v+ Z+ S" j
Desk Reference and package insert should also put a) i; q5 e0 h- O Q$ }. u" _2 ^2 j
warning about the virilizing effect on a male or
* u3 n1 @$ ]& mfemale child who might come in contact with some-
, t; _+ @( t& vone using any of these products.
$ A- v+ i8 ?. t% h% ]References# M P8 r+ Q) Z) F7 ^" j
1. Styne DM. The testes: disorder of sexual differentiation7 s8 w* A7 T3 N
and puberty in the male. In: Sperling MA, ed. Pediatric
' f N2 c, U+ s6 `: |1 IEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;% X1 A& v. K2 y, q# N% k
2002: 565-628.5 h6 A, L; b2 v E
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
+ D# R0 o G- f( H+ qpuberty in children with tumours of the suprasellar pineal
2 G$ [; y+ I, k6 }4 s0 oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! }) r( y( u) D% t2 H/ F+ l* }+ ?8 ]" BTopical Testosterone Exposure / Bhowmick et al 543
/ W5 c5 o5 D ]& u7 t1 ?" S! d/ W& p; Pareas: organic central precocious puberty. Acta Paediatr.0 d- h6 S& p) D& I; f4 ^
2001;90:751-756.2 b6 v b( Z. Q' F+ ]% C
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.5 d, K- Z2 |; b' u6 l6 g5 O: J# w7 B; y
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
' m1 M" r! l% q/ o% C, b4 EDekker Inc; 2003:211-238.# _ f+ v: A5 V) s* ?
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
1 S4 Z% f% i3 W' |6 g3 t2 i. gdevelopment in a two-year-old boy induced by topical# U9 {; Q* S/ C, r) a2 q3 ?* J u
exposure to testosterone. Pediatrics. 1999;104:e23.2 }' X! S& B- f7 B- n9 J [
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
6 j5 c) _. F% _( F- `Skeletal Development of the Hand and Wrist. 2nd ed.
0 J% A( @, |) e* EStanford, CA: Stanford University Press; 1959.
. T3 s6 g* ]2 j f, D4 }. y+ D I6. Physicians’ Desk Reference. Androgel 1% testosterone,
" l2 J ~' T% E0 {# U, u; `$ bUnimed Pharmaceutical Inc. Montvale, NJ: Medical: d1 R3 M4 f. a8 w6 g
Economics Company, Inc; 2004:3239-3241.: ?/ R6 h) r0 H* B
7. Klugo RC, Cerny JC. Response of micropenis to topical
" g* N% D8 y( v& V) b: V% Ntestosterone and gonadotropin. J Urol. 1978;119:
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