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is a significant concern for physicians. Central1 I _( N; |2 `$ ]) {* X
precocious puberty (CPP), which is mediated
/ X$ B! A& c- pthrough the hypothalamic pituitary gonadal axis, has
9 t1 j& l5 y7 d/ \8 Na higher incidence of organic central nervous system- C/ F0 K( \- y, t3 {/ j! m/ W
lesions in boys.1,2 Virilization in boys, as manifested' Z" A2 ~8 I* X: k% Y
by enlargement of the penis, development of pubic4 C {; ?. F. e' k& e" v
hair, and facial acne without enlargement of testi-4 H" o+ C9 {) Z% S& M# q' ]
cles, suggests peripheral or pseudopuberty.1-3 We6 e( i' r# R: d$ D, r
report a 16-month-old boy who presented with the' S- X' \5 k+ h, ~% q$ h) I
enlargement of the phallus and pubic hair develop-4 x. |/ K! @: Z0 R9 T" }
ment without testicular enlargement, which was due1 G! G2 Q6 _' c4 K/ g
to the unintentional exposure to androgen gel used by: z- n7 D# A8 y) W
the father. The family initially concealed this infor-4 X* O1 Z; M% i
mation, resulting in an extensive work-up for this
4 P' D. L% p1 ~, Z8 ?& N4 N" achild. Given the widespread and easy availability of
9 V1 ?# Y2 _7 ntestosterone gel and cream, we believe this is proba-' o- t: y, L, N M
bly more common than the rare case report in the
2 I; I: T" u% O/ K4 f! Rliterature.47 H6 h% q2 \# q- }, e
Patient Report7 D9 T1 b. G8 |3 `, |, Y2 e' a3 w
A 16-month-old white child was referred to the
8 {1 ?0 D; K9 e) z" Mendocrine clinic by his pediatrician with the concern: O8 b0 J9 x4 s( b
of early sexual development. His mother noticed
' {$ Q, M7 c" [light colored pubic hair development when he was
- t6 D! x6 B/ d6 ?& b& o' v hFrom the 1Division of Pediatric Endocrinology, 2University of3 v- h: y) k" ^. G9 `
South Alabama Medical Center, Mobile, Alabama.
5 y3 J% |, Q- u( ~, BAddress correspondence to: Samar K. Bhowmick, MD, FACE,
1 a$ D% O/ d ?4 a& g$ }% K) PProfessor of Pediatrics, University of South Alabama, College of- W- ~, H) V# _+ F& ~. M8 k
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
% D3 M- @+ e3 {# Qe-mail: [email protected].- G5 |/ B& _, {$ A+ p3 d9 a
about 6 to 7 months old, which progressively became/ v, E n# d0 K' S" N* v" m
darker. She was also concerned about the enlarge-4 i& ~$ r2 i1 h( c) B8 a; B
ment of his penis and frequent erections. The child0 J; P( q& W" S% F2 D' Y& i1 r
was the product of a full-term normal delivery, with" f& @7 \! a4 r5 S
a birth weight of 7 lb 14 oz, and birth length of. P2 c& ]( r; j2 Q- K6 A0 Y- y9 \
20 inches. He was breast-fed throughout the first year/ B1 Z6 E9 J% i
of life and was still receiving breast milk along with
6 n6 W9 O6 }0 t {) d% }solid food. He had no hospitalizations or surgery,! I# T0 L( K& v M& H$ z; [# `
and his psychosocial and psychomotor development8 D6 n' F! n" ?
was age appropriate. ?+ D6 S( F5 m) Y+ h' Q
The family history was remarkable for the father, S3 Q' p2 B: u$ q: T7 u
who was diagnosed with hypothyroidism at age 16,
: y8 q" c$ [ B; N6 uwhich was treated with thyroxine. The father’s
! v" S. `, A! hheight was 6 feet, and he went through a somewhat
) |& {7 ^) b0 l4 J8 u. `early puberty and had stopped growing by age 14.
, K( X: N- K. R. R7 d! n! O+ }The father denied taking any other medication. The
' \/ y2 e) K; e3 n" |' }child’s mother was in good health. Her menarche
) v% v- s5 d# Z8 L% X. Vwas at 11 years of age, and her height was at 5 feet
$ z# N, m! h' h: G5 inches. There was no other family history of pre-
& s! N) O2 K& e& {$ x( g3 Ccocious sexual development in the first-degree rela-
% j, V# u+ F! H, Dtives. There were no siblings.- W/ }" c+ _/ _5 ?; E
Physical Examination4 i) C% E8 T' W. w" W- `% g) X
The physical examination revealed a very active,
+ A Z3 o- V+ e) o) w8 jplayful, and healthy boy. The vital signs documented7 ^1 I# r# A9 Z# U
a blood pressure of 85/50 mm Hg, his length was% f A; p: |& K; J& N2 }* k
90 cm (>97th percentile), and his weight was 14.4 kg# X$ W$ s0 V5 t- `# p0 P
(also >97th percentile). The observed yearly growth! Q. }' Y; y: @
velocity was 30 cm (12 inches). The examination of* S" G! D/ y- t# G5 c
the neck revealed no thyroid enlargement.; ]0 A" @8 c h( V. D/ ~$ y2 z
The genitourinary examination was remarkable for- \+ H) S1 f+ H( M1 f2 k
enlargement of the penis, with a stretched length of0 n F5 w% v) d
8 cm and a width of 2 cm. The glans penis was very well
$ t7 w0 ?7 e) R: K, W/ y( O' ~" }developed. The pubic hair was Tanner II, mostly around" K5 A$ b4 S$ e5 [7 i
540
* P/ i2 l1 x6 \9 o# Nat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, @3 P0 H. F/ Y! |; Bthe base of the phallus and was dark and curled. The
1 n! d4 w! I) D' ]testicular volume was prepubertal at 2 mL each.
/ P$ ^- A* m+ C% ?The skin was moist and smooth and somewhat4 d/ o6 k( n2 L& S
oily. No axillary hair was noted. There were no$ B! T7 o9 ?1 r# a
abnormal skin pigmentations or café-au-lait spots.
3 ^1 R8 _9 p/ [9 F- Y% |% mNeurologic evaluation showed deep tendon reflex 2+" `/ r7 _& ?3 b- ?! ]$ ^' d: H' I
bilateral and symmetrical. There was no suggestion* q& @0 w9 F! N$ W& \
of papilledema.
% o& d: X7 ^2 uLaboratory Evaluation
) H7 J# @- N; G3 V4 m/ N, k2 _% NThe bone age was consistent with 28 months by* t" O, \ t# e7 r1 w
using the standard of Greulich and Pyle at a chrono-0 {$ c ~/ v$ A
logic age of 16 months (advanced).5 Chromosomal
: y4 |. D9 w5 l; u6 Hkaryotype was 46XY. The thyroid function test
+ v6 X; Q. h/ Cshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
1 U3 D3 e6 P) |1 Clating hormone level was 1.3 µIU/mL (both normal).
; q8 t: O9 ]3 S( s7 O' W* L7 \: CThe concentrations of serum electrolytes, blood, Y7 U/ K0 a1 ?8 m0 Y
urea nitrogen, creatinine, and calcium all were
F1 Y4 v* \6 P! vwithin normal range for his age. The concentration/ _" I. g9 l) ?% z% Y; ?
of serum 17-hydroxyprogesterone was 16 ng/dL
6 k+ ?- `; Q3 @7 D8 I(normal, 3 to 90 ng/dL), androstenedione was 20- \, J) R: C' j' w( d
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-1 L' O6 v; P0 I3 O% X0 o
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
( G$ ^8 `( u& O2 J1 z2 p7 i& xdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
) i7 b3 A6 u1 f9 Z8 v4 U9 l49ng/dL), 11-desoxycortisol (specific compound S)
3 I! r$ i |" [* F3 {( q" lwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-* N! d4 N. m5 d: E6 M. G; M
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
% }) |0 o/ u# B- s( l* u9 e0 \testosterone was 60 ng/dL (normal <3 to 10 ng/dL),. g5 X* V' ]8 Q' H2 V
and β-human chorionic gonadotropin was less than
% e4 w' d1 d, n* }: l9 p. P0 Y5 mIU/mL (normal <5 mIU/mL). Serum follicular" E' J$ h4 r0 G5 _2 k! n# C
stimulating hormone and leuteinizing hormone: D% \) a& G/ \: F7 o' ?% t
concentrations were less than 0.05 mIU/mL+ e6 D6 F( w# i6 y
(prepubertal).
1 \0 S. a; Q+ Q1 O6 g0 Q6 yThe parents were notified about the laboratory( q' S9 p; G, \/ T/ ~7 A4 f. q
results and were informed that all of the tests were. R$ i5 B1 e5 X" z: @
normal except the testosterone level was high. The
0 T$ t$ N! a$ g1 G0 B& ffollow-up visit was arranged within a few weeks to' G# A9 Z- _! a/ W6 Q7 X
obtain testicular and abdominal sonograms; how-
( H* A9 x2 x# {% bever, the family did not return for 4 months.: m& |: h. o0 ]
Physical examination at this time revealed that the
0 |) ?" t, O ?" c7 Y2 P9 echild had grown 2.5 cm in 4 months and had gained/ c V! X- ?0 B& i$ a3 d7 P& E
2 kg of weight. Physical examination remained2 n( H2 j1 J! ~4 i2 J
unchanged. Surprisingly, the pubic hair almost com-
) O9 Q) n$ B f* c' ppletely disappeared except for a few vellous hairs at
) j7 G$ @/ U* R# Gthe base of the phallus. Testicular volume was still 2
) a' q3 X1 t2 K' U$ }1 omL, and the size of the penis remained unchanged.
. k6 Z' F" A0 G$ Q' h8 \2 BThe mother also said that the boy was no longer hav-
5 ^& u% ^1 T1 ~5 i; \6 h( Uing frequent erections.8 E4 \5 T* C* ]1 N$ m& J x
Both parents were again questioned about use of
0 |0 N/ a9 n7 X# N* G; zany ointment/creams that they may have applied to, i7 ^5 t2 J F1 H1 J
the child’s skin. This time the father admitted the
8 n2 T- h! r# N" A( C5 MTopical Testosterone Exposure / Bhowmick et al 541; s5 x4 U$ u1 H; V2 k3 L
use of testosterone gel twice daily that he was apply-
) ]$ ~9 u9 o( t3 Q! [8 Ming over his own shoulders, chest, and back area for* P& z9 i2 g8 f8 W- g. R5 ]" p
a year. The father also revealed he was embarrassed
) h4 c$ z# b( R' e& pto disclose that he was using a testosterone gel pre-0 ]' W! T$ x+ p; i7 Y
scribed by his family physician for decreased libido0 w0 B! K! `. u* ]# c5 r
secondary to depression.
! |* Y& j0 W; Z" ~: ]* CThe child slept in the same bed with parents.
+ B1 S5 \$ W! I6 ^The father would hug the baby and hold him on his$ b: w9 H+ j- W# \
chest for a considerable period of time, causing sig-
1 r0 p- w- V) d1 `$ y9 ynificant bare skin contact between baby and father.
/ W9 v% f/ S/ I7 P; E& \/ P7 yThe father also admitted that after the phone call,* W4 s2 C( k. H; ]+ o+ O
when he learned the testosterone level in the baby9 |/ i+ f% e, R( m# p; q
was high, he then read the product information
4 |8 o& y4 s# p+ H6 j! D" Lpacket and concluded that it was most likely the rea-% P) K, S( } p& m# ?
son for the child’s virilization. At that time, they
$ D) N9 _9 X* U* c2 B6 {! h. gdecided to put the baby in a separate bed, and the
' l3 L) T0 x0 e* ?8 qfather was not hugging him with bare skin and had
9 V3 @! | V/ h6 u, z* C( Vbeen using protective clothing. A repeat testosterone
% i, B+ }4 g8 |* u% D: g/ _test was ordered, but the family did not go to the: B& f( j. `: w% ^) K: O7 Y4 l
laboratory to obtain the test.7 N. `0 S) J8 E9 P7 z
Discussion- I, f$ O* `/ ~8 o
Precocious puberty in boys is defined as secondary
" R- B) m. G4 N: `: M( \. ~sexual development before 9 years of age.1,4' T6 P* m% T/ l( D6 D6 V3 t5 {2 m
Precocious puberty is termed as central (true) when6 r- `' |; X8 @. w& z; s
it is caused by the premature activation of hypo-6 Y. O0 r8 c, A# q+ H# ^3 l" s- s
thalamic pituitary gonadal axis. CPP is more com-( Z$ e% L j' f1 H* g
mon in girls than in boys.1,3 Most boys with CPP6 v* U8 y s; h; q: u3 `
may have a central nervous system lesion that is
/ _, h! m) b4 a4 \) Oresponsible for the early activation of the hypothal-' Z! {# `) q& p5 L, A
amic pituitary gonadal axis.1-3 Thus, greater empha-
$ M7 S+ q. D/ _8 B8 Esis has been given to neuroradiologic imaging in
r. N E. s5 l& U, vboys with precocious puberty. In addition to viril-
) }+ r2 a- c* t" z! uization, the clinical hallmark of CPP is the symmet-
& A6 L, ^ t7 X) f: _" _rical testicular growth secondary to stimulation by
. E4 A K2 v- `$ Q) h# agonadotropins.1,3
7 w% K* t0 c6 p* Y% }Gonadotropin-independent peripheral preco-6 G3 S5 o4 t( c6 _; N% k$ W
cious puberty in boys also results from inappropriate
/ ? s( w* B# }/ S' E7 {0 Fandrogenic stimulation from either endogenous or! e8 N# j; v8 R! _
exogenous sources, nonpituitary gonadotropin stim-
( K0 r8 f& q. {+ x; J% \- eulation, and rare activating mutations.3 Virilizing
( C0 a( {0 I3 t/ O1 Q7 E/ Icongenital adrenal hyperplasia producing excessive( B5 T7 S+ B6 z I
adrenal androgens is a common cause of precocious
3 W' H5 l* i Opuberty in boys.3,4' e/ `# o& n& i. x
The most common form of congenital adrenal! S8 q8 k; i, {4 A: C; ?2 j2 U
hyperplasia is the 21-hydroxylase enzyme deficiency.
3 T% ~2 L5 p% xThe 11-β hydroxylase deficiency may also result in: ^* X& v2 A3 e5 {- R8 c% ~% d
excessive adrenal androgen production, and rarely, t, Q; ^. H7 w. ~, E2 u3 `
an adrenal tumor may also cause adrenal androgen: e2 x* g5 A7 l, \
excess.1,3
+ A* a5 D7 l' Q6 r$ @at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* A/ K1 W9 w- D/ N# d: J4 S
542 Clinical Pediatrics / Vol. 46, No. 6, July 20074 r0 G0 e$ O0 V4 M/ q# @6 K1 M
A unique entity of male-limited gonadotropin-
3 i1 p+ c: ]& D6 W0 A7 y( pindependent precocious puberty, which is also known& t5 }! Y' T* h8 \2 S! \$ l8 k
as testotoxicosis, may cause precocious puberty at a
, J+ R; v* \* N" g9 F6 Wvery young age. The physical findings in these boys
* N4 K# ~' Z% x+ Gwith this disorder are full pubertal development, g) f. B7 c+ Z N$ F
including bilateral testicular growth, similar to boys
- |: {$ ^8 l/ i. l: @with CPP. The gonadotropin levels in this disorder) i* E0 G# d1 {8 E$ u' |9 |
are suppressed to prepubertal levels and do not show0 w0 o$ K( B/ \
pubertal response of gonadotropin after gonadotropin-
: c7 t8 N' H6 k9 `releasing hormone stimulation. This is a sex-linked
: V2 {1 N5 U2 i1 G& f0 L, |autosomal dominant disorder that affects only
5 Q; k1 R- H6 i0 omales; therefore, other male members of the family
# m0 `( [6 z; `: [may have similar precocious puberty.3
. B d7 z O# T; qIn our patient, physical examination was incon-
* {3 F7 m# J; C8 k) P2 f- N+ ?7 \- ?3 bsistent with true precocious puberty since his testi-7 g6 a0 |+ h( t- \& M
cles were prepubertal in size. However, testotoxicosis0 V( N) p) A- G- U+ g: @$ G
was in the differential diagnosis because his father5 h) b( e. }" Y& n% [
started puberty somewhat early, and occasionally,
3 x/ q, u/ Y5 a7 w, ~* k ?testicular enlargement is not that evident in the
8 P) f$ T! ?( {% U# K0 q8 e3 r+ V7 R+ hbeginning of this process.1 In the absence of a neg-3 N( C8 M- i" z- e3 k
ative initial history of androgen exposure, our
8 [5 K1 w9 H0 P# Jbiggest concern was virilizing adrenal hyperplasia,
`1 B6 n" N2 e Beither 21-hydroxylase deficiency or 11-β hydroxylase9 C! ~, a; k @! s9 I% L4 w0 g) G" O7 _
deficiency. Those diagnoses were excluded by find-
8 {- v, `; R# C$ B; J2 \+ |" n! l6 `ing the normal level of adrenal steroids.
& R* ^/ S/ ^+ Z2 m& x9 _The diagnosis of exogenous androgens was strongly
4 h; F7 b" e# W7 q5 J( gsuspected in a follow-up visit after 4 months because |4 E8 c0 C( i5 \9 j. i
the physical examination revealed the complete disap-
, i' i% K5 K5 g0 W+ S7 h! hpearance of pubic hair, normal growth velocity, and& P% F* D# {; x5 ~) {
decreased erections. The father admitted using a testos- H9 _5 Z7 K2 A6 p% s3 v
terone gel, which he concealed at first visit. He was
" _+ F6 S0 x/ X% lusing it rather frequently, twice a day. The Physicians’9 @) N. e( r4 V, ], D
Desk Reference, or package insert of this product, gel or
5 d, f" w3 L# Tcream, cautions about dermal testosterone transfer to
2 ^ I, {' ` u' Junprotected females through direct skin exposure.
; o, B1 L7 @# `+ `) }Serum testosterone level was found to be 2 times the( K3 c v4 X" H5 p' `
baseline value in those females who were exposed to
3 L- F' ?2 A, m4 {' Teven 15 minutes of direct skin contact with their male2 ?+ M, s! P1 ^4 w
partners.6 However, when a shirt covered the applica-5 r/ h, P8 b: O
tion site, this testosterone transfer was prevented.+ b7 l* H f. S2 z8 j
Our patient’s testosterone level was 60 ng/mL,+ c7 y! q2 g; z# f, j
which was clearly high. Some studies suggest that
3 G9 |, Z$ `* I* f' d, K# t: ?dermal conversion of testosterone to dihydrotestos-
& z! K1 K2 K$ K) |: L' ~terone, which is a more potent metabolite, is more
( t; ~1 i! U9 B5 i8 ^active in young children exposed to testosterone2 G9 H3 K# B) ~5 h' B: \; ]
exogenously7; however, we did not measure a dihy- c' d$ }$ D' C9 W, L
drotestosterone level in our patient. In addition to7 o: k/ e7 Q, z- {0 F+ n! E3 a
virilization, exposure to exogenous testosterone in V8 f1 U8 w. |# X; @ G) V
children results in an increase in growth velocity and* R: p) ?& V) t. A% M; E, [/ N
advanced bone age, as seen in our patient.
- I4 I" b. v7 Q P( h. d+ jThe long-term effect of androgen exposure during4 R$ `9 k; }" K; M& I* \) x
early childhood on pubertal development and final
2 t0 n) j; L3 _2 ^: m6 oadult height are not fully known and always remain
8 [& I+ ?; y& ~' j! K/ Ia concern. Children treated with short-term testos-
2 u. i# M) k* A7 O) A1 W2 h- U' M/ Wterone injection or topical androgen may exhibit some8 W* u/ U; B4 p& _5 ^
acceleration of the skeletal maturation; however, after
/ n7 F) A e. p8 M( z3 y* Bcessation of treatment, the rate of bone maturation9 }, v1 B7 i8 H$ C$ z j9 u# w
decelerates and gradually returns to normal.8,9
3 c! Y5 r# |5 z+ G: y3 ^There are conflicting reports and controversy
- @! e" w# w/ J# X1 ~( _% qover the effect of early androgen exposure on adult8 g v e* Q0 W3 ?9 J2 z( F
penile length.10,11 Some reports suggest subnormal
; U$ N, k7 N7 ]1 Z& u: gadult penile length, apparently because of downreg-
8 D& v6 ]5 b% F6 k. G: }0 L% Aulation of androgen receptor number.10,12 However,0 u. ~" k. v3 J0 q
Sutherland et al13 did not find a correlation between8 ^6 M% W* f: N* R
childhood testosterone exposure and reduced adult8 F9 }& j" M7 }! \# k% g( l
penile length in clinical studies.
& _) x0 f, }/ _. RNonetheless, we do not believe our patient is
( R% O! o. n' t! f; t( B% {, n+ I- t4 Tgoing to experience any of the untoward effects from
' `5 I8 L9 d$ c( V' ~testosterone exposure as mentioned earlier because
1 n$ h3 U4 F; k! z5 V; Bthe exposure was not for a prolonged period of time.& e, R+ C$ g: }: j7 r+ {" ?
Although the bone age was advanced at the time of
, F" }& q, y$ c6 fdiagnosis, the child had a normal growth velocity at9 y* D" ~( v# n$ E# @# [) T
the follow-up visit. It is hoped that his final adult( o1 U1 v A" j
height will not be affected.
1 l3 M C: t% O! e4 bAlthough rarely reported, the widespread avail-! F* G# K) m, F9 Z6 w4 Y, R8 U& y
ability of androgen products in our society may. n, C8 E- T8 O) b
indeed cause more virilization in male or female/ ^8 J7 J7 \2 i+ `! P0 r$ V, f
children than one would realize. Exposure to andro-9 K$ K6 B) Z/ P. |7 W4 L
gen products must be considered and specific ques-0 |# Y5 X/ w3 o: x
tioning about the use of a testosterone product or& Q3 j ^. d/ ?% i
gel should be asked of the family members during3 d! t A/ ]# |8 `& w, y+ W0 D
the evaluation of any children who present with vir-' Y, R, H/ x H) K) s
ilization or peripheral precocious puberty. The diag-" A9 T+ W# P' G& h' r
nosis can be established by just a few tests and by
8 [) R' R2 O0 B6 j6 uappropriate history. The inability to obtain such a* V! f( O7 l8 U4 q
history, or failure to ask the specific questions, may
+ i: h. g# Q* h0 W/ C ?result in extensive, unnecessary, and expensive
1 n7 ~" P$ u* Qinvestigation. The primary care physician should be$ Z! o- u9 x" D6 _: K
aware of this fact, because most of these children
2 E( b! P9 S( `9 rmay initially present in their practice. The Physicians’5 w! Q/ N6 o6 i; q
Desk Reference and package insert should also put a: ~$ f, A8 X6 r1 i
warning about the virilizing effect on a male or6 `3 n: s; U6 C" U" X
female child who might come in contact with some-
, q6 ]$ k$ y; e% K4 t9 yone using any of these products.! y7 K! Z+ Y0 B) q
References
+ B D1 y2 J4 \/ D( y6 O" B, f( Z) f1. Styne DM. The testes: disorder of sexual differentiation/ S* N0 r0 l+ E# h" G. j( n
and puberty in the male. In: Sperling MA, ed. Pediatric' C% w2 j6 V, {
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
( k# H9 @3 u6 z. A5 A2002: 565-628.
# i* o. X) J v: B0 G- ?" \2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
) |4 ~* G; z0 |: Q% B1 _. O2 Npuberty in children with tumours of the suprasellar pineal
( l1 L, N* B3 a J$ Y8 _1 Nat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 g2 x/ E1 B8 F' @4 S9 H
Topical Testosterone Exposure / Bhowmick et al 543
) _; e6 Y9 k: [( i s6 k0 R: eareas: organic central precocious puberty. Acta Paediatr.) c W$ P9 F5 [8 A! V
2001;90:751-756.
! Z4 s( E7 K9 u' s. u) h3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.5 C* T5 k7 P3 }! p" @6 {
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
' Y! S3 [; J8 h( QDekker Inc; 2003:211-238." C& r+ ~" H5 {; o( W2 z- K
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
9 \/ g m( A( `8 H4 Ddevelopment in a two-year-old boy induced by topical
3 g% n8 n1 g4 [# W+ k |exposure to testosterone. Pediatrics. 1999;104:e23.
. e- P8 b) V2 X, ~7 e$ u5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
5 p1 I# K2 C! E( }! z/ E7 Z3 p" t2 {Skeletal Development of the Hand and Wrist. 2nd ed.
) k6 ~! V; j h5 s0 OStanford, CA: Stanford University Press; 1959.
$ T% b( S. q% w" ~$ D/ O; l$ @; K6. Physicians’ Desk Reference. Androgel 1% testosterone,1 t/ \+ U9 G7 o8 Y3 A: p, {
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
. {$ p k1 d4 g% ]# R' y- E0 ?+ REconomics Company, Inc; 2004:3239-3241.1 h# k. j: b9 x/ ]
7. Klugo RC, Cerny JC. Response of micropenis to topical
( V' ^+ c0 i' ~7 N! T: Y! [testosterone and gonadotropin. J Urol. 1978;119:
4 G$ @2 H# W- C9 a i8 B667-668.7 [, N+ m1 X$ g9 g! J
8. Guthrie RD, Smith DW, Graham CB. Testosterone6 T# Z+ [* M) W8 n8 r. I: D& r
treatment for micropenis during early childhood. J Pediatr.
+ U" N4 c" N; b9 g+ [3 Z1973;83:247-252.
( B& L) F- o* L. l7 d) C, _5 ~9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
% w) O6 M# b3 G9 d0 O" }therapy for penile growth. Urol. 1975;6:708-710.
`0 \+ K/ z& a7 w* ]( m10. Husmann DA, Cain MP. Microphallus: eventual phallic
( n5 o1 y9 h3 Y% I) Ssize is dependent on the timing of androgen administra-; ^9 ?: j- L7 \# E
tion. J Urol. 1994;152:734-739. `7 Q- H. q0 y7 E" D
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:$ `: @$ P9 J+ x W' \' Y5 {
does early treatment with testosterone do more harm$ d3 z( |/ X; @% ?. Q' R* e
than good? J Urol. 1995;154:825-829.
+ Q2 ~4 |! u$ t+ S/ y4 F& A12. Takane KK, George FW, Wilson JD. Androgen receptor- S+ P2 b9 W/ Y5 x% w
of rat penis is down-regulated by androgen. Am J Physiol.8 T5 f" Y9 U0 @, E
1990;258:E46-E50.
+ [ A7 \# L: b13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
" g( _" R- H; i7 C0 l( k7 v/ uof prepubertal androgen exposure on adult penile. l# `6 w5 A7 _) u4 P- f& v* \
length. J Urol. 1996;156:783-787. |
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