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is a significant concern for physicians. Central6 r, G2 T$ i% v9 d
precocious puberty (CPP), which is mediated- Q3 n6 ]1 L- D' d# d# ?
through the hypothalamic pituitary gonadal axis, has
' C9 o& [* J/ ta higher incidence of organic central nervous system! J" u5 E2 z0 G9 Y8 p+ Y
lesions in boys.1,2 Virilization in boys, as manifested% }1 Z+ j K" B5 ?$ u. _1 d
by enlargement of the penis, development of pubic
& \( h3 h, n9 n9 l" o; V& X* vhair, and facial acne without enlargement of testi-
$ h! U! R: Z2 m8 ?cles, suggests peripheral or pseudopuberty.1-3 We+ H; }2 D( U$ F6 Z3 M2 e0 K
report a 16-month-old boy who presented with the3 R/ d' _$ z1 Y
enlargement of the phallus and pubic hair develop-
% [9 \- B; I5 Tment without testicular enlargement, which was due3 Y3 ]2 L+ ]1 x0 j- x
to the unintentional exposure to androgen gel used by i4 ~" t5 Y0 K& N4 r1 T
the father. The family initially concealed this infor-
8 e4 k2 {1 D% _1 W% h" Pmation, resulting in an extensive work-up for this
& w* I3 H3 \; |5 t' f3 m; ochild. Given the widespread and easy availability of2 x& J( j# p \- n1 z% D
testosterone gel and cream, we believe this is proba-7 @: M( ?0 G6 j" v- _& K" i
bly more common than the rare case report in the
9 U& z: ^( z( [3 X& n4 L) H3 [" ^literature.4
, Q. m5 a) {4 ^% z7 i6 ^" W" ePatient Report' b/ I+ P8 q, s2 i
A 16-month-old white child was referred to the# Z# H. \" H4 ]# G0 O7 \2 T
endocrine clinic by his pediatrician with the concern) Q! m! Q- s* a& [+ B* t, x
of early sexual development. His mother noticed
2 K- ]' S8 D. g6 j* o* Wlight colored pubic hair development when he was" p! \3 g B, I5 m8 `, P
From the 1Division of Pediatric Endocrinology, 2University of
( q; S0 ?% J4 ]2 }South Alabama Medical Center, Mobile, Alabama.
; m6 K/ ~0 ~+ R% A' W/ k! wAddress correspondence to: Samar K. Bhowmick, MD, FACE,4 n1 T% O+ i2 F7 j0 j! m; m
Professor of Pediatrics, University of South Alabama, College of
3 ^, B2 s0 |' B! wMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;* R- K2 Y' J9 H
e-mail: [email protected].
! Z* s2 R% @3 F+ g2 b" U( Nabout 6 to 7 months old, which progressively became& v7 x$ q$ I% Y B- R9 V p
darker. She was also concerned about the enlarge-
* ?7 b3 P" R. m. g5 X& gment of his penis and frequent erections. The child
) B# j* d8 l' `5 N( j* Nwas the product of a full-term normal delivery, with+ |1 L- F1 V ]: n% ~
a birth weight of 7 lb 14 oz, and birth length of
; x6 _" K# g' ^20 inches. He was breast-fed throughout the first year
3 b* Y* v4 [- }' I7 O# f8 U( jof life and was still receiving breast milk along with
6 N" R$ I) j# K3 bsolid food. He had no hospitalizations or surgery,
9 S" M$ A' h$ I) W, W. W8 }and his psychosocial and psychomotor development9 `- ]' F) p; S; ~
was age appropriate.
: \; x+ c1 ^1 @8 UThe family history was remarkable for the father,+ T4 m% p9 U e" H& m
who was diagnosed with hypothyroidism at age 16,
# l2 ?/ }# p* Xwhich was treated with thyroxine. The father’s0 [2 x5 C. ]% z; |! D, ~
height was 6 feet, and he went through a somewhat; ?0 ?& g- X$ _; u9 \3 N( l
early puberty and had stopped growing by age 14.
9 M1 P) C# v {The father denied taking any other medication. The" n, Q# C1 [' N
child’s mother was in good health. Her menarche
" A; R; t U9 ^+ J% J( p6 R* `was at 11 years of age, and her height was at 5 feet
g+ e, n- \# U6 |2 N7 S5 inches. There was no other family history of pre-
3 r' _2 ~0 _( Ccocious sexual development in the first-degree rela-
8 ?, m5 A& x% h. R, stives. There were no siblings., q1 O2 ?4 w, d/ D# P' \
Physical Examination: p* o F3 V# b8 T4 r- I
The physical examination revealed a very active,
' X v; J) R8 ^; d. j* |playful, and healthy boy. The vital signs documented: P. g0 N3 V# L" Y3 r3 e
a blood pressure of 85/50 mm Hg, his length was( _3 a" I- G# k$ u$ L- m M
90 cm (>97th percentile), and his weight was 14.4 kg
, X, m% Y- d! G8 a+ `4 E5 R(also >97th percentile). The observed yearly growth7 J' s% f0 p" C. E" [
velocity was 30 cm (12 inches). The examination of
9 \% ~; I" @5 w1 S' W- l( zthe neck revealed no thyroid enlargement.
; I: N/ m! E2 w4 W' O+ E2 i2 kThe genitourinary examination was remarkable for T, N, {- `8 D3 q' i' M
enlargement of the penis, with a stretched length of! a2 D* j: Q) T9 }
8 cm and a width of 2 cm. The glans penis was very well
" t5 @9 c' S6 C* N( }2 mdeveloped. The pubic hair was Tanner II, mostly around
1 u" u/ F; E d) }540/ L9 X) J. {4 x( I
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
( _* k8 k+ o5 n" }" `the base of the phallus and was dark and curled. The
4 A8 A" x% w' |3 f5 |) Btesticular volume was prepubertal at 2 mL each.: ~- Q" @5 z- C0 z% }8 ?& f: x; I
The skin was moist and smooth and somewhat
3 U3 D' T# y+ d, u4 V boily. No axillary hair was noted. There were no. K0 U7 Z l' h# K; A# I& u, a
abnormal skin pigmentations or café-au-lait spots.
8 a; ^% i3 [6 S' lNeurologic evaluation showed deep tendon reflex 2+# Z$ ~. z2 @4 X+ j3 \' l
bilateral and symmetrical. There was no suggestion) y5 M7 o; m. }3 c% S+ O
of papilledema.
# l D' ^$ V: a rLaboratory Evaluation
- L& h) v: u: z$ E+ G+ tThe bone age was consistent with 28 months by8 h t# T1 c5 x. Y# D4 M
using the standard of Greulich and Pyle at a chrono-
4 [7 L" j4 ~% hlogic age of 16 months (advanced).5 Chromosomal
* y) t) W9 q+ t r' d8 `5 c- t2 Z2 bkaryotype was 46XY. The thyroid function test3 |; C; I7 A8 [) ~; \1 | H
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
3 B' [: p% k; ?5 X: O+ }2 Ylating hormone level was 1.3 µIU/mL (both normal).
: S0 M9 O! b, D- \4 xThe concentrations of serum electrolytes, blood
& Q2 l' Y) s$ {5 Nurea nitrogen, creatinine, and calcium all were7 {4 A' ^- U5 F- G/ C8 }. o3 s" f
within normal range for his age. The concentration3 H0 ~. T. S0 V
of serum 17-hydroxyprogesterone was 16 ng/dL
8 K3 e4 u9 r/ U- [(normal, 3 to 90 ng/dL), androstenedione was 20
7 B! S/ Y. d5 M( D1 Dng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-' I) c) d2 F7 l
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
6 f0 W* R0 J/ n. A: y/ i y3 }desoxycorticosterone was 4.3 ng/dL (normal, 7 to9 i e% m$ e2 z' W& `! J9 I
49ng/dL), 11-desoxycortisol (specific compound S)
2 }8 H& H3 a6 Mwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
4 S5 K* ]& s% c& t0 _tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total' }& w* y/ D& `' ]
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
' t T2 s7 L# G5 L( i3 r1 c% Z0 |and β-human chorionic gonadotropin was less than+ k4 F5 \! W& f! v
5 mIU/mL (normal <5 mIU/mL). Serum follicular7 A. Q8 o: a# I$ u& V
stimulating hormone and leuteinizing hormone9 b: F# Q5 B* K( B& K+ H
concentrations were less than 0.05 mIU/mL
4 e5 ^" L' n, g% g) j( n(prepubertal).0 G" \, F( U( d' F+ c, ^9 M* \
The parents were notified about the laboratory
. r0 w8 @' f* I- ?4 {! }' O8 Kresults and were informed that all of the tests were4 |5 u+ w4 i( X9 W: Z' i# z2 j
normal except the testosterone level was high. The
, Z2 _9 Q% \, g# ~( tfollow-up visit was arranged within a few weeks to( E( R3 C: _: S% J# x
obtain testicular and abdominal sonograms; how-
- C3 h" h7 J9 `" A' Y/ Z9 j, hever, the family did not return for 4 months.
4 Q9 @0 b7 |; e! o0 [Physical examination at this time revealed that the* J( ]% ?( x' T
child had grown 2.5 cm in 4 months and had gained9 p! H2 B$ F+ |/ W7 [
2 kg of weight. Physical examination remained+ t% r! a5 d1 w# k. s! c5 x% Y% _
unchanged. Surprisingly, the pubic hair almost com-+ H! _5 Y8 ^# ?2 P, {4 Q& Y
pletely disappeared except for a few vellous hairs at4 g$ k+ ~+ n" ]% f8 n& L3 u5 k
the base of the phallus. Testicular volume was still 2! D+ L6 Q9 [8 Z; i
mL, and the size of the penis remained unchanged.+ J7 G) D" I/ e1 A7 T: `! j. q7 X& h
The mother also said that the boy was no longer hav-
/ f2 T" t8 U# p! zing frequent erections.
& {- O7 @% T. PBoth parents were again questioned about use of
0 x+ z! i- `" {' f* Aany ointment/creams that they may have applied to, X- l9 m. r* \; }! R/ M! I" `
the child’s skin. This time the father admitted the& Y+ _. C# E9 z! ^0 J% ~
Topical Testosterone Exposure / Bhowmick et al 541 C8 a( V6 c/ J7 j6 \
use of testosterone gel twice daily that he was apply-
( X) V% z& `3 |9 b- G% L/ u" uing over his own shoulders, chest, and back area for
4 ]3 ^* D! x: A8 A" i4 Ja year. The father also revealed he was embarrassed" m2 l( v! y$ J0 G/ C# ?& G/ y
to disclose that he was using a testosterone gel pre-1 I; u2 u7 F5 J4 T$ n9 I
scribed by his family physician for decreased libido) y) R K2 r" |- u5 W+ T+ ^
secondary to depression.
( C" c' l7 R+ H$ Y, n" f/ WThe child slept in the same bed with parents.
4 ]/ u4 E) C9 W/ n+ W1 }The father would hug the baby and hold him on his
1 @& \- j, l3 L: C% Jchest for a considerable period of time, causing sig-' u& q% T4 `, Q! G( _. R- O& Y1 o) v
nificant bare skin contact between baby and father.
! Q+ A8 b: x9 c+ _- LThe father also admitted that after the phone call,
$ K; P/ \/ m3 M0 Jwhen he learned the testosterone level in the baby
, h4 N9 J( l" n2 kwas high, he then read the product information
; Z5 U# I$ n4 ^& n1 v9 lpacket and concluded that it was most likely the rea-! }$ w8 b& v. l9 C; {$ u! D
son for the child’s virilization. At that time, they4 [* A4 {9 f1 x! \$ y! O1 a
decided to put the baby in a separate bed, and the
+ P( q% }2 n7 [* s; G8 Yfather was not hugging him with bare skin and had @- F7 u( B$ j! B; Z
been using protective clothing. A repeat testosterone. N; O# l6 h4 m2 f/ E" r4 u
test was ordered, but the family did not go to the
5 s' ^( ^+ J: Nlaboratory to obtain the test.
w* A' h0 `9 w% R8 m6 S. HDiscussion- U; d A" f; B2 U0 {
Precocious puberty in boys is defined as secondary9 F7 g4 S" L; G& K. x M5 ~0 G* t
sexual development before 9 years of age.1,42 p1 s, u% J! ]: J! H
Precocious puberty is termed as central (true) when/ L) H, g4 s+ u
it is caused by the premature activation of hypo-
0 p* B# r# H/ C: U; [6 x6 qthalamic pituitary gonadal axis. CPP is more com-0 }9 _; M/ P1 [/ l$ V9 g# K7 j4 ^
mon in girls than in boys.1,3 Most boys with CPP Z" N4 o: P; Y( M
may have a central nervous system lesion that is
8 U b* n) ~ H6 z8 P) K$ C. c& Oresponsible for the early activation of the hypothal-
, {/ n9 h! c8 H p- O6 z) A$ bamic pituitary gonadal axis.1-3 Thus, greater empha-; T+ P' v0 N e( K. a* y6 x6 u2 H9 X
sis has been given to neuroradiologic imaging in6 Q" \! C, P$ Z8 I9 j) s$ x% e
boys with precocious puberty. In addition to viril-6 i4 j7 X$ A; v Z# }# w8 w# N
ization, the clinical hallmark of CPP is the symmet-, f+ u1 @" L+ P; ^, f
rical testicular growth secondary to stimulation by4 B4 O' i' ~- b; }: F" q; n' X
gonadotropins.1,3) T# w/ Q3 Z4 u4 a. b
Gonadotropin-independent peripheral preco-$ w% q3 _1 A! \' X+ r9 u' q
cious puberty in boys also results from inappropriate9 O& J! P& e9 `# _
androgenic stimulation from either endogenous or
' W P2 w1 U' B6 K6 w- qexogenous sources, nonpituitary gonadotropin stim-
* V4 f" J' \) n, qulation, and rare activating mutations.3 Virilizing
0 b. \+ K9 f/ f1 t% }6 G& gcongenital adrenal hyperplasia producing excessive. Y' c( W% N+ O
adrenal androgens is a common cause of precocious" L7 X( g) b5 F' K E8 }% l3 R
puberty in boys.3,46 D2 U) d8 u- @: y
The most common form of congenital adrenal# k) C* e7 v4 R; J5 z7 q
hyperplasia is the 21-hydroxylase enzyme deficiency.
4 x: }3 P# ^& P% v! s* J1 |The 11-β hydroxylase deficiency may also result in
6 |) G) @1 u) J+ v% Dexcessive adrenal androgen production, and rarely,
8 |( w p0 ~' J5 j. Q( \& w1 }2 N, Ean adrenal tumor may also cause adrenal androgen
( m, W7 q$ H1 p$ Fexcess.1,3
6 L1 i4 ?7 Z" eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 A5 r1 t- D, L' _ m542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
! l- C/ T4 K7 b( D5 FA unique entity of male-limited gonadotropin-
6 b k' o5 ~( F& g( R7 U. K) p* vindependent precocious puberty, which is also known9 V& p9 a) O Y. B
as testotoxicosis, may cause precocious puberty at a8 I! w" n5 K/ ]5 u3 S2 ?/ K& R
very young age. The physical findings in these boys+ K; g5 z9 H4 l) s
with this disorder are full pubertal development,$ \3 g+ g+ t. l+ ]: \ A7 V* z
including bilateral testicular growth, similar to boys% u! }9 }& s* R ]4 t/ x. l6 b
with CPP. The gonadotropin levels in this disorder
$ `6 Y- U5 h2 q3 y1 a7 lare suppressed to prepubertal levels and do not show
c/ h7 _. O! @* }; o+ vpubertal response of gonadotropin after gonadotropin-) e, ?3 [) d$ f# A, e% Y# \
releasing hormone stimulation. This is a sex-linked
: K* F% U7 j+ [2 B% w8 \autosomal dominant disorder that affects only% T5 s" t6 ]' K4 j0 v' n+ e
males; therefore, other male members of the family" _" q) f; f* G+ G) @( k
may have similar precocious puberty.3
8 F2 E& P3 K; w3 o) g- W6 D4 S# S+ cIn our patient, physical examination was incon-
7 S S- u5 f& I2 q8 L- |sistent with true precocious puberty since his testi-
5 x2 ~( N* j v9 u7 U6 \5 ]cles were prepubertal in size. However, testotoxicosis1 W' A7 N# s' H2 ]
was in the differential diagnosis because his father2 M9 i# Z/ B" P6 u6 n
started puberty somewhat early, and occasionally,8 d0 } w5 k8 U, ]
testicular enlargement is not that evident in the- X& X4 n& F1 q, C5 g
beginning of this process.1 In the absence of a neg-
; u( ]: _9 D5 T- D4 w; Yative initial history of androgen exposure, our* Q( |8 t4 d* B
biggest concern was virilizing adrenal hyperplasia,
2 |, x0 J$ V) \+ z6 |either 21-hydroxylase deficiency or 11-β hydroxylase% l: m' ?) S5 V
deficiency. Those diagnoses were excluded by find-( i6 b4 \- x) A( ?7 u
ing the normal level of adrenal steroids.
; |$ Y: ^9 o& a# s7 ~ qThe diagnosis of exogenous androgens was strongly
+ ]+ z7 M5 x/ x9 r' H$ f3 K- {7 }suspected in a follow-up visit after 4 months because
. `. w' }8 ]- v) [' F) R" l7 fthe physical examination revealed the complete disap-; N4 m6 c" r2 b$ F" b1 M7 w1 W
pearance of pubic hair, normal growth velocity, and6 w2 Z- j% d2 i) o! a
decreased erections. The father admitted using a testos-; p0 t: p g& I l3 y" g3 T
terone gel, which he concealed at first visit. He was
^* _* n6 O# x& _ }, A/ kusing it rather frequently, twice a day. The Physicians’
& ?* Y& ~( ~: a9 F3 E5 PDesk Reference, or package insert of this product, gel or" R: j* a# k X$ s
cream, cautions about dermal testosterone transfer to
) l E+ z, ?# U1 u: g. eunprotected females through direct skin exposure.4 B" @" h% E/ X! u/ M
Serum testosterone level was found to be 2 times the, J1 h6 k/ l+ H+ D9 M. p$ \
baseline value in those females who were exposed to
7 z; ~" i# i% z* [6 w" {- c& `, seven 15 minutes of direct skin contact with their male, d0 y$ d, u; l- G. }$ g: v
partners.6 However, when a shirt covered the applica-: i, c5 r8 h+ e6 R7 P1 U
tion site, this testosterone transfer was prevented.% z, W0 P- p' R$ j9 u
Our patient’s testosterone level was 60 ng/mL,
) ^! c( M h8 b; E5 [, Gwhich was clearly high. Some studies suggest that
. A- ]" B: L# Fdermal conversion of testosterone to dihydrotestos-
' p& ^' O: C- m& Y/ wterone, which is a more potent metabolite, is more1 F( I; L' g% O
active in young children exposed to testosterone: D# n' ^8 ]% p
exogenously7; however, we did not measure a dihy-5 ^1 X$ m" G/ W& J5 R/ p# t8 r
drotestosterone level in our patient. In addition to0 l2 U& t- ^8 j- e; r
virilization, exposure to exogenous testosterone in2 {7 K% F: }7 p0 M
children results in an increase in growth velocity and
/ q: _' g- t) B5 g. |/ qadvanced bone age, as seen in our patient.: I# k* B% ?% @% a
The long-term effect of androgen exposure during2 `* s2 ^+ F; `$ V
early childhood on pubertal development and final9 o" m: j# ~) B* S) ]
adult height are not fully known and always remain% Z6 D0 @* A( \! T
a concern. Children treated with short-term testos-
+ r: H% J$ [/ ?/ L5 E, O( {terone injection or topical androgen may exhibit some
' F( h9 w$ L7 _; r2 \5 I& Cacceleration of the skeletal maturation; however, after
; q! v2 O. G3 d5 kcessation of treatment, the rate of bone maturation
- T' h* J# L' r6 J$ G+ V) udecelerates and gradually returns to normal.8,9
0 D# L0 ~: @3 f2 H: } }There are conflicting reports and controversy0 z1 T \7 ~" z# Z
over the effect of early androgen exposure on adult
0 k! v( P+ `3 J& j' [/ ypenile length.10,11 Some reports suggest subnormal
9 n2 t/ G" h1 Dadult penile length, apparently because of downreg-
$ h0 ]5 c" N: n4 o/ sulation of androgen receptor number.10,12 However,
6 f3 b& G$ w' |7 a8 l9 JSutherland et al13 did not find a correlation between
( B, Z" m% N( [# v9 Kchildhood testosterone exposure and reduced adult5 `* N: c# l- P# z. ?$ l/ \
penile length in clinical studies.
( m \- V+ _6 Q! Z7 M1 i' A& uNonetheless, we do not believe our patient is: ~9 P/ Y' J' `3 c) W x& |& C
going to experience any of the untoward effects from9 y! O1 y( s9 f) ?9 T
testosterone exposure as mentioned earlier because
; v" {/ i1 H) ^" u& q4 ]the exposure was not for a prolonged period of time.$ j$ ?: a+ G+ I& J5 ~
Although the bone age was advanced at the time of2 I) w6 s' C x
diagnosis, the child had a normal growth velocity at3 Z: G2 ?. ^* w2 e. T
the follow-up visit. It is hoped that his final adult
! ^1 c- Q1 i8 Pheight will not be affected.
" C6 L* G! b* _Although rarely reported, the widespread avail-& N' [7 M* b, o/ \1 ]' ?, G! V: ~
ability of androgen products in our society may# D! ?# z3 j7 w8 s4 l" P
indeed cause more virilization in male or female9 Z6 M. ?. e* Q" A- d
children than one would realize. Exposure to andro-
7 }3 l* c* Z0 N4 qgen products must be considered and specific ques-
+ W+ }7 H7 U: _tioning about the use of a testosterone product or
, M4 x; |; S5 b* `8 ^9 Bgel should be asked of the family members during5 A: D$ v* }8 \( k5 Q r* ]
the evaluation of any children who present with vir-9 w" \* X1 \; G) J9 F) \' M, u
ilization or peripheral precocious puberty. The diag-
7 Z! ^1 C( K4 ~" ?+ P8 W$ Znosis can be established by just a few tests and by) J5 R# {0 n3 q" L& @4 e$ N
appropriate history. The inability to obtain such a
# ~4 |. U5 M8 O6 H& t& qhistory, or failure to ask the specific questions, may
N4 ~' |7 M! d2 bresult in extensive, unnecessary, and expensive# T& M9 m. i# {- W0 h; T: F
investigation. The primary care physician should be$ [, I1 v. M4 O5 ?0 U( Y
aware of this fact, because most of these children
; Y5 X: [, j4 B h$ s zmay initially present in their practice. The Physicians’' j ?0 t1 \1 j7 |! W8 S
Desk Reference and package insert should also put a
4 d) ]& \. x, I, x! Vwarning about the virilizing effect on a male or
0 O0 J8 R' v- O2 l5 Ofemale child who might come in contact with some-
5 |; x2 A1 g$ R) o& r4 Bone using any of these products.
5 C% S2 w& J) q- \) W3 ^7 S8 GReferences
" }) w: S* I; T$ }1. Styne DM. The testes: disorder of sexual differentiation
0 d6 V9 q6 |% Q5 l6 y/ [6 kand puberty in the male. In: Sperling MA, ed. Pediatric
% v. e% _6 m! v$ T' _1 [$ XEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders; A7 U( ?: R8 H$ A7 r
2002: 565-628.
. j" B( A- x. @: y t0 a7 z2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious6 ^5 Z# @6 U3 ?1 R9 h3 o3 v
puberty in children with tumours of the suprasellar pineal
0 O, J+ C0 Y8 O5 I2 r' R- @at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* |* n& t" z( ^: h# }3 @Topical Testosterone Exposure / Bhowmick et al 543' j I3 i; L3 m3 I/ a
areas: organic central precocious puberty. Acta Paediatr.
u" P: U" D; J7 x# X4 S: j2001;90:751-756.0 n9 \8 v6 Z" d0 W6 A
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.! p) R- I) g" B
Pediatric Endocrinology. 4th ed. New York, NY: Marcel9 Y6 v, u: u& M% P
Dekker Inc; 2003:211-238.
* D4 X; W l& ?& F6 F2 ?, J1 ?+ i4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual0 B2 z1 V& T7 N" G! K! X0 e
development in a two-year-old boy induced by topical
( u* M& T& I. Y4 Uexposure to testosterone. Pediatrics. 1999;104:e23.
8 E/ R2 z& L: y5 n0 {" E5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
1 D/ e8 n6 v6 @. dSkeletal Development of the Hand and Wrist. 2nd ed.
! i5 R- c8 ~5 u% |3 k5 j* I! X5 {Stanford, CA: Stanford University Press; 1959.8 o- {( k, {" D; r
6. Physicians’ Desk Reference. Androgel 1% testosterone,
: p9 i* {* w# e5 pUnimed Pharmaceutical Inc. Montvale, NJ: Medical, W* K. c( A3 ^- q$ A0 z
Economics Company, Inc; 2004:3239-3241.' h' c: O5 s: T H' ]* L0 G
7. Klugo RC, Cerny JC. Response of micropenis to topical
}4 n3 x# H; T. mtestosterone and gonadotropin. J Urol. 1978;119:7 K1 F- A) f% M% Q, D% d/ S
667-668.
2 S% O. G% C( q! V6 }, @8. Guthrie RD, Smith DW, Graham CB. Testosterone+ v' S9 P+ N5 p& W9 Y: v3 _
treatment for micropenis during early childhood. J Pediatr.+ i, n5 ]) m1 \0 P$ y3 B
1973;83:247-252.
, D5 d. a8 ~6 \: B9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
4 j/ m! C# ?- }: T' F* c$ _: Btherapy for penile growth. Urol. 1975;6:708-710." X; ?5 A6 r: a( S1 W' x; F P( V$ J" B
10. Husmann DA, Cain MP. Microphallus: eventual phallic
6 ^. d9 X" G4 g- d# K: h+ j, s3 usize is dependent on the timing of androgen administra-- C3 w' c: |* J5 M8 a7 v
tion. J Urol. 1994;152:734-739.7 H( t5 G2 f1 ^- l* q: v
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
" ]/ k7 h, [( m0 ldoes early treatment with testosterone do more harm
* K) D: ^8 a: w. _9 Z; vthan good? J Urol. 1995;154:825-829.
: L# {/ O8 I5 {12. Takane KK, George FW, Wilson JD. Androgen receptor! e4 }# b: m- y! l8 N; t v
of rat penis is down-regulated by androgen. Am J Physiol.- p2 N" S& f. ?3 f! W8 z$ \
1990;258:E46-E50.* t8 P# C+ {( i
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect% w% g" |# c2 f' F5 i# E! r
of prepubertal androgen exposure on adult penile( p* _. _: l) k7 S& Q
length. J Urol. 1996;156:783-787. |
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