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is a significant concern for physicians. Central
$ ^5 Y# i, U7 q% ~9 j7 h Yprecocious puberty (CPP), which is mediated
1 t7 `, B' h# T' g9 r( x8 uthrough the hypothalamic pituitary gonadal axis, has
: m _- g9 y9 B* wa higher incidence of organic central nervous system
) g4 E( o( F7 E0 D8 n7 u7 M% Y+ u0 Elesions in boys.1,2 Virilization in boys, as manifested, M3 R" S" V) Z( x$ l$ Y
by enlargement of the penis, development of pubic3 L0 [# i, p. F
hair, and facial acne without enlargement of testi-- U8 a9 L% j2 K
cles, suggests peripheral or pseudopuberty.1-3 We. \" W0 w" u% K" T( j
report a 16-month-old boy who presented with the) k5 L" w9 C4 s5 s! ?1 [! S5 e1 H
enlargement of the phallus and pubic hair develop-3 o L+ P# U0 b# x P1 g
ment without testicular enlargement, which was due
5 q) O8 Q3 ? ~$ Hto the unintentional exposure to androgen gel used by
9 d* v& j, P6 t9 Pthe father. The family initially concealed this infor- t5 K) `2 ]* v1 y' R
mation, resulting in an extensive work-up for this( Q w$ d" v; o
child. Given the widespread and easy availability of# g& U' d1 @* } K
testosterone gel and cream, we believe this is proba-. f: M1 p8 i, V4 g
bly more common than the rare case report in the) Z9 P% \ U: i( W$ [ \8 F0 F
literature.4& g, ^# u" }) z# Z- o. o1 q
Patient Report3 {" N0 W# V6 J- O& B- h
A 16-month-old white child was referred to the4 i) X# \& j; }$ H/ a8 {
endocrine clinic by his pediatrician with the concern' M, B' \8 u* x. `/ ^* Z
of early sexual development. His mother noticed
# C4 }9 h; G, C" `+ [light colored pubic hair development when he was
% b; l) F0 h: ]; y% j/ q2 LFrom the 1Division of Pediatric Endocrinology, 2University of
7 z# ~3 D/ X# g( M1 y$ L% }5 MSouth Alabama Medical Center, Mobile, Alabama.+ }. F3 ^4 p4 I: L# `
Address correspondence to: Samar K. Bhowmick, MD, FACE,7 v# e) p" {' n9 `6 M
Professor of Pediatrics, University of South Alabama, College of( X3 P0 ?! j4 M- [% r0 x8 s7 ^ M. C
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
+ ~7 e, t0 C9 B, Z# ^' xe-mail: [email protected].
' ^7 v" \9 h2 I: Y6 X3 k) E& Pabout 6 to 7 months old, which progressively became, P g5 A* Y2 S2 P. T1 u$ Y/ g9 B
darker. She was also concerned about the enlarge-
$ n9 U7 a! ^! O* d3 v$ l( Sment of his penis and frequent erections. The child6 M* {( l, U) B' l! d) D1 T, b
was the product of a full-term normal delivery, with1 }3 A9 \) M( B& |# v
a birth weight of 7 lb 14 oz, and birth length of
* L( L8 N5 b F4 J4 D20 inches. He was breast-fed throughout the first year4 U' \* Y4 j& O* ~
of life and was still receiving breast milk along with
# k: J* Q- b4 b& fsolid food. He had no hospitalizations or surgery,
& ^/ w9 J8 R$ l" Wand his psychosocial and psychomotor development
1 X. Y! @ C: f: p8 Bwas age appropriate. y, a: Y6 k# L: t
The family history was remarkable for the father,
# c: ?9 j2 c0 }. j" lwho was diagnosed with hypothyroidism at age 16,
( r- N) g3 Q* ^7 E$ A2 zwhich was treated with thyroxine. The father’s
! ~, x* A* I- e% }+ ^- @3 nheight was 6 feet, and he went through a somewhat* k* p, U, [7 t
early puberty and had stopped growing by age 14.8 [2 J4 b) A# L
The father denied taking any other medication. The
2 S6 V- f3 j# g. Jchild’s mother was in good health. Her menarche% f- v% K) m* @0 `# d$ \
was at 11 years of age, and her height was at 5 feet
, K; I( x. n8 q' s4 j$ m5 inches. There was no other family history of pre-
, t% m, u' w) U. O( O! g- I/ Wcocious sexual development in the first-degree rela-9 }0 G5 f4 M. G2 c: K
tives. There were no siblings.6 w) P2 V- {1 Q; j9 o. ~
Physical Examination
3 \$ H: @, {( [! A8 rThe physical examination revealed a very active,8 e3 C7 o- e) J; W4 ]
playful, and healthy boy. The vital signs documented
: y" D: `5 Y. v' E, Sa blood pressure of 85/50 mm Hg, his length was
8 t( U. `- V2 f9 Z90 cm (>97th percentile), and his weight was 14.4 kg( |$ S% K2 y j) D2 q
(also >97th percentile). The observed yearly growth
4 a( b! u( x3 L) [: qvelocity was 30 cm (12 inches). The examination of# e8 F# m. F9 H& I: d( ?
the neck revealed no thyroid enlargement.
# }6 x; j$ R7 c }9 zThe genitourinary examination was remarkable for2 z$ X2 o' U$ a5 ~
enlargement of the penis, with a stretched length of z1 X9 c) Q0 T% F, E
8 cm and a width of 2 cm. The glans penis was very well
. K, n' N9 N8 U0 m( Q' o1 ]9 B$ Hdeveloped. The pubic hair was Tanner II, mostly around/ G1 d( v" ^; P. d2 q2 J
540* ?- `1 L# Y$ u8 p" B8 l3 `8 s
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. m, a/ ?6 d2 ythe base of the phallus and was dark and curled. The
* `6 J9 U; ~& m% rtesticular volume was prepubertal at 2 mL each.
% l! w- Q, j; a$ c! m4 _3 _* SThe skin was moist and smooth and somewhat
, k3 ]' Z; R% E+ z/ W; l2 ?! p6 {oily. No axillary hair was noted. There were no( C* j5 m: b. V$ R( p
abnormal skin pigmentations or café-au-lait spots.$ m; f5 z, g: ~0 S% g N% \6 G
Neurologic evaluation showed deep tendon reflex 2+
& |% _+ x4 B K' D9 _3 p1 Cbilateral and symmetrical. There was no suggestion2 s9 L8 x1 a4 z. z+ k% d; J3 [, L
of papilledema.
9 o: |7 f3 ]' a4 tLaboratory Evaluation
+ j& f$ y9 v9 l" _, ^# m! o4 nThe bone age was consistent with 28 months by6 q; g* n: f2 U' O% P" M
using the standard of Greulich and Pyle at a chrono-
. K# c6 g+ [0 D' y+ d6 l7 |2 Rlogic age of 16 months (advanced).5 Chromosomal6 w5 {+ k; [3 L5 c
karyotype was 46XY. The thyroid function test
& I! I" N& S7 J, l0 v' v+ Mshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
. I- I, _0 T# m T! `6 J# Hlating hormone level was 1.3 µIU/mL (both normal)." S# V8 v* Z/ Q* L' c3 i4 U* M8 C
The concentrations of serum electrolytes, blood% l7 r+ x+ K4 N) h
urea nitrogen, creatinine, and calcium all were/ K# D" Q8 d' e; l1 P
within normal range for his age. The concentration
7 Y6 y, Q* D* j7 V' s/ tof serum 17-hydroxyprogesterone was 16 ng/dL8 u& _, h- P) ?$ t
(normal, 3 to 90 ng/dL), androstenedione was 200 Y3 P% `: j9 o: m
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
$ l6 G& [% M# I1 Z! i- e" wterone was 38 ng/dL (normal, 50 to 760 ng/dL),
( U6 [( j! ^+ U1 V- @% x4 @3 Pdesoxycorticosterone was 4.3 ng/dL (normal, 7 to, h) y) ` e: L b
49ng/dL), 11-desoxycortisol (specific compound S)
6 @, [4 S S/ ]* ~3 X8 V# m2 }1 d% wwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
" V2 a( h R+ V! |! k( Ctisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
: o1 m3 N# F9 ~) X! t7 ytestosterone was 60 ng/dL (normal <3 to 10 ng/dL),* |2 [% R( @- Z1 [
and β-human chorionic gonadotropin was less than. i% @( z( ^; Y. _4 ]
5 mIU/mL (normal <5 mIU/mL). Serum follicular
" k% t, K! H2 m6 @stimulating hormone and leuteinizing hormone/ M. F) \* C: u! y w1 M
concentrations were less than 0.05 mIU/mL
7 Q# M. _; Z5 S3 w$ _(prepubertal).
. g3 r& W7 P# c- BThe parents were notified about the laboratory2 l! B1 L' ]/ P5 o* X
results and were informed that all of the tests were2 \2 A$ ?6 T- Q5 ~! \8 N8 r
normal except the testosterone level was high. The
6 r; D5 N$ C' ofollow-up visit was arranged within a few weeks to: t# q& z' x: W0 S" ~' L
obtain testicular and abdominal sonograms; how-
# [# t: E0 r9 s& r* Z( T+ bever, the family did not return for 4 months.
4 d# T9 _$ x$ b, f. A% n/ S9 dPhysical examination at this time revealed that the
5 l: Q$ H5 o# r P. X q# q/ [child had grown 2.5 cm in 4 months and had gained
+ B% o; R" W( z5 g5 w; g2 kg of weight. Physical examination remained# z9 u3 s$ A6 I# c+ J+ y
unchanged. Surprisingly, the pubic hair almost com- q# R! F+ Q2 h! w: o9 t
pletely disappeared except for a few vellous hairs at
6 }, [( i2 g- wthe base of the phallus. Testicular volume was still 2
- Z% c; ]- C; J1 a6 MmL, and the size of the penis remained unchanged.
- J) N9 u7 {, pThe mother also said that the boy was no longer hav-3 l b5 I6 @* R/ r' i
ing frequent erections./ D' j0 \) L% g1 @ M
Both parents were again questioned about use of
( j3 c. d# E, j8 i7 qany ointment/creams that they may have applied to0 p+ w+ e$ |* M) v, [7 [% o. i
the child’s skin. This time the father admitted the
, x( B3 i7 H4 n6 [9 e3 t$ b- TTopical Testosterone Exposure / Bhowmick et al 541" k/ A$ g T" j8 a2 p( R
use of testosterone gel twice daily that he was apply-/ D1 I7 n1 M, t! M5 J& Q: Y4 c
ing over his own shoulders, chest, and back area for
; E1 }7 g( m, X( Y% |a year. The father also revealed he was embarrassed
. i/ W! S$ l0 R& ^0 v- p* I* Eto disclose that he was using a testosterone gel pre-0 N5 h: i+ W9 D" W8 {0 D
scribed by his family physician for decreased libido
. C. b/ z# F/ L3 ]; Tsecondary to depression.
" y3 ^. [ e% M. H. NThe child slept in the same bed with parents.
$ \% k1 h& m# U. JThe father would hug the baby and hold him on his
* Y! y8 U8 ?1 achest for a considerable period of time, causing sig-
/ Q5 E3 F+ G. i! G; z6 ]nificant bare skin contact between baby and father.
+ l) q/ g( B0 f/ kThe father also admitted that after the phone call,
# M L. T5 f: J$ B* A: rwhen he learned the testosterone level in the baby& u' D8 N8 Q" s( z$ l+ o
was high, he then read the product information! d$ N; C9 d: k$ j) [. w6 l: R
packet and concluded that it was most likely the rea-
# t8 M4 P$ { X T$ xson for the child’s virilization. At that time, they
4 s7 k& L C! d' R z v1 N! Sdecided to put the baby in a separate bed, and the. i8 j/ z" U5 }; x
father was not hugging him with bare skin and had, S1 W! y% | R# i' N7 n0 K* j! S
been using protective clothing. A repeat testosterone
3 P( @* A5 R& E( }% Htest was ordered, but the family did not go to the
8 L& P) h1 h1 ulaboratory to obtain the test.
: h/ {* o+ S1 D5 M/ g# S7 DDiscussion
2 C9 s( f. _* s. C6 M" jPrecocious puberty in boys is defined as secondary9 e9 U. l1 M. Z1 r$ J3 ?
sexual development before 9 years of age.1,4- c; i9 l+ B6 y2 }8 F8 o
Precocious puberty is termed as central (true) when/ p3 H5 ^6 X) Y: q0 o
it is caused by the premature activation of hypo-
& K- I- v) g3 w' S% p8 S! {8 }( Dthalamic pituitary gonadal axis. CPP is more com-
8 `2 p8 P( m. F* {' x( Imon in girls than in boys.1,3 Most boys with CPP
8 F) p5 h1 Y' ~- a& dmay have a central nervous system lesion that is
; k* D4 [) U3 @* w' Q1 @! rresponsible for the early activation of the hypothal-2 o; Q( Y/ y& n: ]4 A" e* x
amic pituitary gonadal axis.1-3 Thus, greater empha-2 r. X) `) @0 C' M. l
sis has been given to neuroradiologic imaging in( ?8 H3 ?# H9 _4 A
boys with precocious puberty. In addition to viril-
* S7 ~; t ^0 o) {* }7 wization, the clinical hallmark of CPP is the symmet-2 a1 ] |9 P6 \7 l. g/ ]3 t' k
rical testicular growth secondary to stimulation by
4 F2 z* o. o' Kgonadotropins.1,3
* G# `" D) s8 _% e' k5 n/ B q+ _Gonadotropin-independent peripheral preco-$ Y) J0 E9 n; V- B2 q$ }! J
cious puberty in boys also results from inappropriate
# ?4 x2 | E2 D( Y4 ~' ^androgenic stimulation from either endogenous or
7 o e" m: {! M* M, h& G& aexogenous sources, nonpituitary gonadotropin stim-4 z7 }7 A- C5 N' G
ulation, and rare activating mutations.3 Virilizing8 q" [/ m0 Y( B9 ]: F8 q+ s
congenital adrenal hyperplasia producing excessive
4 K# \) S6 Z0 f6 V a8 {adrenal androgens is a common cause of precocious
$ p* N, A- M; \$ P8 ~; Xpuberty in boys.3,4
5 G5 R+ ~4 \+ b: RThe most common form of congenital adrenal# p: E7 Z) o3 l3 D2 L8 H! j, ^
hyperplasia is the 21-hydroxylase enzyme deficiency., M. x. _1 p! Z
The 11-β hydroxylase deficiency may also result in
( n- C+ \ Z& L0 \excessive adrenal androgen production, and rarely,/ u. ^4 L" P7 y* U7 p# u
an adrenal tumor may also cause adrenal androgen
6 i* b4 |% b% J6 z9 }excess.1,3" b; h* D( s$ f. z) Y
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from0 y! E7 l4 [/ f
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
0 y/ D/ s! e6 FA unique entity of male-limited gonadotropin-& c5 X+ j& j" f- n! F! L3 N
independent precocious puberty, which is also known
, n. w, A) ^& n% U6 d) das testotoxicosis, may cause precocious puberty at a
$ c( C0 P% Y% B0 pvery young age. The physical findings in these boys
# E _: Z: \, c) c% s" }with this disorder are full pubertal development,; ^: i# [7 e' Y, \- B. e
including bilateral testicular growth, similar to boys1 o' z5 u% v$ l n; |1 D
with CPP. The gonadotropin levels in this disorder0 T$ q! U' b9 b ]
are suppressed to prepubertal levels and do not show
% c# I( a& M3 |6 l2 E* O& rpubertal response of gonadotropin after gonadotropin-7 m7 J# L0 @" ~- }
releasing hormone stimulation. This is a sex-linked
+ |: K- v) `) O# A Yautosomal dominant disorder that affects only
+ [( [, b: w+ C, S' |! c1 P2 a: m Bmales; therefore, other male members of the family
2 ^# `/ _; o+ Q+ C/ N2 K1 fmay have similar precocious puberty.3
6 ~: |1 W( j5 C4 t! k+ F" DIn our patient, physical examination was incon-
2 c* S; K$ {( H% Psistent with true precocious puberty since his testi-( }) Z8 _8 K0 |
cles were prepubertal in size. However, testotoxicosis
d$ X3 S% `& Kwas in the differential diagnosis because his father4 C2 h& ? O0 g* h' E
started puberty somewhat early, and occasionally,/ m1 U9 D7 ]5 o( w* p3 Z
testicular enlargement is not that evident in the) l$ x" y( b, V! v5 P; g
beginning of this process.1 In the absence of a neg-5 i4 ~5 M' s* z3 p+ }3 h8 N
ative initial history of androgen exposure, our
+ m& g: l0 T* S4 x5 i! r/ b4 Xbiggest concern was virilizing adrenal hyperplasia,
) `& J4 e4 @) m( reither 21-hydroxylase deficiency or 11-β hydroxylase
) s$ X: z! C$ vdeficiency. Those diagnoses were excluded by find-
7 y- a$ ^) j& `ing the normal level of adrenal steroids.4 O& @' G: y% L( [/ F8 ~
The diagnosis of exogenous androgens was strongly
, F; P8 V) N$ U* gsuspected in a follow-up visit after 4 months because) d' i- \# M: p) b, A
the physical examination revealed the complete disap-0 f! n. o+ _4 w% }9 d) k
pearance of pubic hair, normal growth velocity, and- r$ K: Z0 K7 D5 T
decreased erections. The father admitted using a testos-# d' J! m3 B7 A, A- l }
terone gel, which he concealed at first visit. He was
: K; y, S/ H) X9 a- k- e' T% k& [3 rusing it rather frequently, twice a day. The Physicians’1 B; ~& E9 Q/ F
Desk Reference, or package insert of this product, gel or
8 [1 k5 o# P5 q! C! ?. }0 A$ Rcream, cautions about dermal testosterone transfer to
8 B* m% e! c8 A/ d# funprotected females through direct skin exposure.
2 \( ?8 n" h$ c8 A2 KSerum testosterone level was found to be 2 times the
6 _$ T. }! K C b/ S0 L" |" _baseline value in those females who were exposed to
% M( D }- _. r5 [/ R9 Keven 15 minutes of direct skin contact with their male
; F2 X0 D1 z5 ~! @' r* a' K; Npartners.6 However, when a shirt covered the applica-
) o2 `6 Z4 C& h7 r9 v; Ftion site, this testosterone transfer was prevented.# u1 Z4 \1 {5 Y" }
Our patient’s testosterone level was 60 ng/mL,3 \0 u: ]4 f8 L
which was clearly high. Some studies suggest that
/ Z6 n9 R: Y8 o3 p" Vdermal conversion of testosterone to dihydrotestos-4 V* o3 j; M: v5 q7 P
terone, which is a more potent metabolite, is more, z5 ?9 V, u) l3 K) i
active in young children exposed to testosterone
' |. v1 P" \' |9 ?5 x$ O5 K$ m! i9 J: T& ~exogenously7; however, we did not measure a dihy-- h1 h% }+ @- [0 w8 n
drotestosterone level in our patient. In addition to" x/ e: y2 T8 ^( S: I# [) \* n4 s
virilization, exposure to exogenous testosterone in
, J. ~5 `* j+ M7 c3 T( fchildren results in an increase in growth velocity and
4 C! j9 [% o% _8 F# K3 v, Z5 I! ]& wadvanced bone age, as seen in our patient.
% `. p& }, T6 @* C4 SThe long-term effect of androgen exposure during$ F# G! c% V J \$ z7 w( U
early childhood on pubertal development and final
0 S$ O( n* |/ W6 Oadult height are not fully known and always remain
1 w7 s. h: b9 W, d- h' m- E& Fa concern. Children treated with short-term testos-% L( o4 D) j6 v( S" p
terone injection or topical androgen may exhibit some. \$ R5 v. I3 c3 `' `/ ?# {
acceleration of the skeletal maturation; however, after" l( [* I( @+ k9 ^- ^0 r& ^' V
cessation of treatment, the rate of bone maturation
+ y* F( K) w' F$ c6 x+ [decelerates and gradually returns to normal.8,9
. l# g* ^/ x) W) j8 k9 E [There are conflicting reports and controversy; m% d: Z& a' b8 ~; I) q o% D
over the effect of early androgen exposure on adult
# h8 \: Z5 h3 x& zpenile length.10,11 Some reports suggest subnormal
' d8 ]& b y$ q, `! M8 kadult penile length, apparently because of downreg-
4 u2 q% y/ b6 z% u- G$ J8 ~3 h1 Pulation of androgen receptor number.10,12 However,
8 C3 l) N+ D: ~Sutherland et al13 did not find a correlation between% z% |+ x h+ H* o, _8 h0 ]7 \5 k
childhood testosterone exposure and reduced adult
+ W' y+ r0 \2 d' |, Ipenile length in clinical studies.
5 j$ C6 l7 S( |6 L1 Y# c8 [ YNonetheless, we do not believe our patient is6 Z/ i3 ~* J4 ^; i, {* X! d
going to experience any of the untoward effects from! A" r' M( R2 \' m0 m1 i
testosterone exposure as mentioned earlier because) n& ]. W: s0 k7 G* h
the exposure was not for a prolonged period of time.4 ]) S. v5 X& ~7 d, g
Although the bone age was advanced at the time of1 l6 c' W J' z% [7 [3 d
diagnosis, the child had a normal growth velocity at
; C. K1 ^! T. Jthe follow-up visit. It is hoped that his final adult
5 W4 Q5 q$ M% a& bheight will not be affected.$ x E. b# W- b
Although rarely reported, the widespread avail-. M7 H G$ _: _. w& g
ability of androgen products in our society may8 w4 w, x7 J" W' _4 c& h
indeed cause more virilization in male or female* p+ h5 @+ y3 r: U5 w
children than one would realize. Exposure to andro-
. ], O7 ?" z* f/ R, u1 H8 Bgen products must be considered and specific ques-
" e( @: z$ Z0 `& L/ g5 X; ltioning about the use of a testosterone product or
5 U. v0 T' s- \& w- Ngel should be asked of the family members during
- e" M! [' L8 W0 Nthe evaluation of any children who present with vir-' K( {8 J0 p/ h! h
ilization or peripheral precocious puberty. The diag-
' q7 U V- n6 |0 C6 Snosis can be established by just a few tests and by
% n6 \: E) f* h& @6 |$ y7 p$ Dappropriate history. The inability to obtain such a
D5 d6 p+ I1 u8 N, hhistory, or failure to ask the specific questions, may" c) d2 r l! y3 p5 ?2 k6 J0 A9 P
result in extensive, unnecessary, and expensive
3 Y! N' i- l& ?0 p+ s4 finvestigation. The primary care physician should be+ L4 c) p9 A, J9 {* T
aware of this fact, because most of these children3 x5 E* Q3 a& f' u! y2 V( f
may initially present in their practice. The Physicians’
5 r8 I% f; k- U) r+ Q3 x9 {7 E$ j( ZDesk Reference and package insert should also put a3 h* ]3 a! [, F4 U7 M0 N% C
warning about the virilizing effect on a male or% I0 ]& v) b" B) ?2 ?5 X
female child who might come in contact with some-
, g5 P" e6 y" `4 z, Ione using any of these products.4 H3 j+ [2 Q! ^0 M/ { K1 |/ P X
References
" h: H5 x; A1 c. f3 {/ j1. Styne DM. The testes: disorder of sexual differentiation" l, d8 I# `+ F/ Q7 I
and puberty in the male. In: Sperling MA, ed. Pediatric+ b/ J2 N) R5 v$ O Y& h
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
* p7 t; A5 z; [' i( W2002: 565-628.
+ j5 b7 S' W' q" A2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
B$ o' v0 M7 z; w# Q2 G/ a% }puberty in children with tumours of the suprasellar pineal1 w- {& T! R/ G; M$ F7 S$ A
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ c \8 t- U) C2 N' F) q! W1 GTopical Testosterone Exposure / Bhowmick et al 543
1 R( N" P7 `+ Zareas: organic central precocious puberty. Acta Paediatr./ m E5 n* m5 x
2001;90:751-756.7 |! F) F5 J) t, w" U5 G
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.# Y5 b+ k3 V( i
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
# G+ t% p ]/ Q+ g) x, kDekker Inc; 2003:211-238.
8 b& h3 U, {; D* J) d4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
0 M. j2 a2 V( d1 bdevelopment in a two-year-old boy induced by topical, S0 r, E1 K$ C- H- p0 R
exposure to testosterone. Pediatrics. 1999;104:e23.
+ M- W# r; c3 V6 B% K5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
* ~2 @3 R6 q4 b3 s0 gSkeletal Development of the Hand and Wrist. 2nd ed.
/ ]; }9 F" Q- N. {& A/ h1 `: d- ?+ G; jStanford, CA: Stanford University Press; 1959.
; R) T s6 s! ~; r6. Physicians’ Desk Reference. Androgel 1% testosterone,8 q" E7 w' P3 \9 Z5 q2 M% U
Unimed Pharmaceutical Inc. Montvale, NJ: Medical3 v! H8 u# ]' S# O, \# Z
Economics Company, Inc; 2004:3239-3241.& k+ b! S4 P% G
7. Klugo RC, Cerny JC. Response of micropenis to topical
q& u; j: N: K- stestosterone and gonadotropin. J Urol. 1978;119:
. w. V J* E3 J: B- J667-668.) ^! Z* \6 }0 X9 b# q
8. Guthrie RD, Smith DW, Graham CB. Testosterone) y* t3 ?) k8 F% I; k% ]" }
treatment for micropenis during early childhood. J Pediatr.
8 |8 u/ H; W t1973;83:247-252.2 [9 b' B8 V/ I3 c' i, \
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone7 I) Z! `; g! P; R! F
therapy for penile growth. Urol. 1975;6:708-710. W; U( O7 b" a( s: Q# [
10. Husmann DA, Cain MP. Microphallus: eventual phallic1 u' q* Y9 f. E
size is dependent on the timing of androgen administra-
1 `3 U$ o0 v. R. Z; Q4 ^tion. J Urol. 1994;152:734-739.! q! ~2 `6 H' ~* d
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
f( R6 ]0 \/ D: `/ b3 g' ldoes early treatment with testosterone do more harm
3 b* T- \) \) T1 l3 Z, R% @ d' pthan good? J Urol. 1995;154:825-829.! O' t7 l4 @6 p$ a
12. Takane KK, George FW, Wilson JD. Androgen receptor
% p- U! n% S0 @( Z5 O& dof rat penis is down-regulated by androgen. Am J Physiol.( w. M7 D) u" J6 b: i
1990;258:E46-E50.# a2 G/ K; u1 J! b F7 q9 g
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect4 v9 n o2 v9 g1 d6 d/ K
of prepubertal androgen exposure on adult penile9 x5 j" m" s% Y8 L+ _! a3 g% ^3 J
length. J Urol. 1996;156:783-787. |
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