- 註冊時間
- 2023-5-6
- 精華
- 在線時間
- 小時
- 米币
-
- 最後登錄
- 1970-1-1
|
發表於 2025-1-4 03:38:58
|
顯示全部樓層
is a significant concern for physicians. Central
% Z* B1 {! H5 x/ ^7 wprecocious puberty (CPP), which is mediated
7 ?( H, v% X* h6 J+ c0 B, lthrough the hypothalamic pituitary gonadal axis, has
0 }" t/ C: i" j5 q+ g( s: X( R; Ua higher incidence of organic central nervous system
. c: E7 C4 X4 F8 h. \0 Q. Zlesions in boys.1,2 Virilization in boys, as manifested
+ O' }" \' o+ e: z/ ^by enlargement of the penis, development of pubic
$ b" r6 g: [! u# e6 b. n% ?hair, and facial acne without enlargement of testi-
" O" T4 e, _8 q# L8 H) ?2 X, acles, suggests peripheral or pseudopuberty.1-3 We
/ a1 c, K! Y5 o9 g6 e0 Sreport a 16-month-old boy who presented with the- m6 I# l/ Z0 p& Z! d8 ]) y
enlargement of the phallus and pubic hair develop-
& g d K0 r6 ument without testicular enlargement, which was due5 {$ Y/ W7 d; @1 ?/ _2 t
to the unintentional exposure to androgen gel used by/ D' t: g" S3 b8 o5 C! ?
the father. The family initially concealed this infor-
7 c5 K0 k$ M& Bmation, resulting in an extensive work-up for this1 \% d9 \9 a; d+ f! H o
child. Given the widespread and easy availability of8 l2 ^- d6 G, W/ R
testosterone gel and cream, we believe this is proba-. N! j! A: U# e3 ^2 Y
bly more common than the rare case report in the* d' u0 V' s2 X
literature.4
8 z/ Q& [; s" |% J8 bPatient Report, v: b" ~1 m, e' M& T2 h4 N& R
A 16-month-old white child was referred to the- h" E6 B7 Y, F
endocrine clinic by his pediatrician with the concern& e4 Z( B1 [5 P4 p9 F* Q! {
of early sexual development. His mother noticed. O/ _: |: y' g5 H( d
light colored pubic hair development when he was
6 H S* ~2 ^$ S7 ]. K8 uFrom the 1Division of Pediatric Endocrinology, 2University of
% C9 P" J) T& XSouth Alabama Medical Center, Mobile, Alabama.
8 x3 n4 @( O% BAddress correspondence to: Samar K. Bhowmick, MD, FACE,
0 N) ?+ M Y* E# W7 vProfessor of Pediatrics, University of South Alabama, College of
, \. j2 `2 N+ j2 U2 ?* a1 ?/ xMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
- v4 w7 D6 C' U, V2 e9 B0 Ie-mail: [email protected].
+ o7 ?: O8 R, ]about 6 to 7 months old, which progressively became% f+ J# R4 C9 V6 I. j1 ]0 ^% H4 J, Y
darker. She was also concerned about the enlarge-
: O" n% s9 G1 }1 H. cment of his penis and frequent erections. The child
# {. c9 h4 r3 k7 R% q [5 N- Nwas the product of a full-term normal delivery, with* Z- N: N! M4 _) j- X
a birth weight of 7 lb 14 oz, and birth length of ?+ |) i; W3 [
20 inches. He was breast-fed throughout the first year& o3 ?8 X, y k, B( m6 x* H( x
of life and was still receiving breast milk along with# l5 L0 T5 N0 O" J5 h3 y* W
solid food. He had no hospitalizations or surgery,1 f3 a0 l! R9 V8 j; o6 V
and his psychosocial and psychomotor development" c3 B$ b9 t* f4 D) X
was age appropriate.
/ J6 F' t- ?# v: A# D* Y$ VThe family history was remarkable for the father,
1 N2 V& w/ ~6 I! ~who was diagnosed with hypothyroidism at age 16,
, @' u/ F0 T4 n) owhich was treated with thyroxine. The father’s' y" B' C, v+ l; ^# P+ R
height was 6 feet, and he went through a somewhat
/ Y5 H' |* p! R* }; Aearly puberty and had stopped growing by age 14.
& r% H; L, J, l) [; H% jThe father denied taking any other medication. The% K8 J' f0 R+ R0 C6 Q
child’s mother was in good health. Her menarche3 z: D$ r% q$ \* a* Q0 Y' r; t
was at 11 years of age, and her height was at 5 feet: I" C u- m3 z9 X/ j) u4 a% N4 n
5 inches. There was no other family history of pre-
w1 r, k! c. P. T& a3 [. zcocious sexual development in the first-degree rela-
; |; M% m0 ~ V6 m& t1 w |tives. There were no siblings., y9 M" y5 g9 k% f& ]+ K
Physical Examination: {0 f) D5 ]. s; @3 W7 H3 D' ]
The physical examination revealed a very active,
2 c% L2 x1 o- J3 Tplayful, and healthy boy. The vital signs documented
: I2 s; B3 `2 X+ Ma blood pressure of 85/50 mm Hg, his length was" {& C& z3 x$ l' K
90 cm (>97th percentile), and his weight was 14.4 kg) }! v2 ^; m6 G) w5 i+ U) R
(also >97th percentile). The observed yearly growth
1 R- f0 e" n+ _/ I* t$ p7 kvelocity was 30 cm (12 inches). The examination of- V; |' g0 D) p$ e. P/ O( [
the neck revealed no thyroid enlargement.: L& t2 U* B P' P
The genitourinary examination was remarkable for
3 F" }; T4 N; V- f) Benlargement of the penis, with a stretched length of3 ^5 q i. o3 ^# _1 r. |% b
8 cm and a width of 2 cm. The glans penis was very well
- f' X2 P- O" C% Qdeveloped. The pubic hair was Tanner II, mostly around6 r$ j- |0 W0 l$ N' b( v
540/ {0 N T/ S5 }3 t
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 @; j# I" u& v' r& E, x: u8 Y6 tthe base of the phallus and was dark and curled. The* \% T3 f" X5 R1 h/ Y
testicular volume was prepubertal at 2 mL each." `5 K: _6 X6 Z2 S, p. U
The skin was moist and smooth and somewhat# Y, N: o: R t" m% q7 v
oily. No axillary hair was noted. There were no
% u! T1 A; b6 T O! Jabnormal skin pigmentations or café-au-lait spots.
: y# n: m( J' rNeurologic evaluation showed deep tendon reflex 2+' X, J5 p/ O: ^
bilateral and symmetrical. There was no suggestion
' u1 D2 O2 P; f3 O- M5 n3 d% ?of papilledema.
' p! F* V6 \3 H- U2 ]Laboratory Evaluation
( W4 r1 B. @, n6 e: v* x9 q2 p$ PThe bone age was consistent with 28 months by6 _' k7 a/ {$ `) ^
using the standard of Greulich and Pyle at a chrono-, l. _% j0 b# w8 E0 C% e
logic age of 16 months (advanced).5 Chromosomal9 G5 t, t% O$ p7 _$ D
karyotype was 46XY. The thyroid function test( u; I+ n( E6 Y- g F
showed a free T4 of 1.69 ng/dL, and thyroid stimu-1 d: b4 `, m7 g8 v
lating hormone level was 1.3 µIU/mL (both normal).
# L7 b# A) Z' @ vThe concentrations of serum electrolytes, blood
, ?- ?6 a4 E1 ~; g- |urea nitrogen, creatinine, and calcium all were
( p6 U9 {! B! ^ {4 m$ lwithin normal range for his age. The concentration
! n- `& P" \; j, Kof serum 17-hydroxyprogesterone was 16 ng/dL1 K2 j1 }0 ?* k- c3 |
(normal, 3 to 90 ng/dL), androstenedione was 20, T, c+ @8 M6 r5 ^, X
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-5 K6 C8 [( x# L" I7 T$ K. a
terone was 38 ng/dL (normal, 50 to 760 ng/dL),: X- i! m- i( c! n& M: v
desoxycorticosterone was 4.3 ng/dL (normal, 7 to* H/ C+ T& f" J+ a. f8 T
49ng/dL), 11-desoxycortisol (specific compound S)
8 t! F1 T: X6 T1 Hwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-7 E. h( n# @ w: n$ J# Y: j
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total; c8 b+ A, J$ X* Z/ N' G1 I
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),3 [5 Q/ M7 }9 g& ?0 {0 O
and β-human chorionic gonadotropin was less than7 a" p: g! j) F
5 mIU/mL (normal <5 mIU/mL). Serum follicular D8 v6 g; h, [' u9 K+ W8 |* h
stimulating hormone and leuteinizing hormone, }# C5 `) y% Z- X" s0 f: |
concentrations were less than 0.05 mIU/mL
0 X# C# O8 e" U. r(prepubertal).
' [% d! C4 k% \5 E+ r5 sThe parents were notified about the laboratory T5 b+ p6 |# o8 X- C
results and were informed that all of the tests were" ]5 C: W- t \
normal except the testosterone level was high. The
% R8 J5 n$ C& S& t6 f, `follow-up visit was arranged within a few weeks to8 z M7 w' t: w
obtain testicular and abdominal sonograms; how-$ b+ E. }( P3 Y! R, V
ever, the family did not return for 4 months.
$ \) G7 t5 _9 h$ i! kPhysical examination at this time revealed that the
6 `+ J5 }; R5 |/ p& mchild had grown 2.5 cm in 4 months and had gained
: e* J, l* x6 ?2 |8 u2 kg of weight. Physical examination remained% _ B: t! a% p. H
unchanged. Surprisingly, the pubic hair almost com-
X" h% p# @6 t! Fpletely disappeared except for a few vellous hairs at( Y- m1 G6 r1 \
the base of the phallus. Testicular volume was still 2" ]; J' V/ |4 V( k
mL, and the size of the penis remained unchanged.
0 h; y, e" [; A0 |: R* [! `# s G* AThe mother also said that the boy was no longer hav-
# x* G' r$ t+ X( }& I( Zing frequent erections., I1 z: u5 ~5 q; g8 H6 N9 v5 u/ `
Both parents were again questioned about use of5 z% T1 `1 H0 Y, x. A3 H/ `: q: x
any ointment/creams that they may have applied to
8 w9 |+ L" O3 s! A7 u( ?the child’s skin. This time the father admitted the. G& t3 i7 c3 A* L
Topical Testosterone Exposure / Bhowmick et al 541
1 @4 W5 k' {1 H7 ~6 ruse of testosterone gel twice daily that he was apply-
4 \/ V! l9 \9 k+ k" U7 E/ Jing over his own shoulders, chest, and back area for3 W; W" [/ j, g, e% u C
a year. The father also revealed he was embarrassed
2 _- M7 o* N+ i3 M- [% Mto disclose that he was using a testosterone gel pre-
! @$ w5 z; \6 c9 t! U2 ^scribed by his family physician for decreased libido; v* _' f6 m# }9 }: m7 u# {% a% Z
secondary to depression.. t& z0 h$ t) @
The child slept in the same bed with parents.
5 v) B# P8 s4 V! Z, O: NThe father would hug the baby and hold him on his
( k; d; }- p# u- T$ N, Bchest for a considerable period of time, causing sig-8 l1 U; D+ E+ U
nificant bare skin contact between baby and father.
Q; X7 x d" wThe father also admitted that after the phone call,- Y+ K: J) S$ y
when he learned the testosterone level in the baby+ v. E+ i' x8 K' M
was high, he then read the product information4 D- c! s9 \. T& l# {
packet and concluded that it was most likely the rea-, a& v$ s: _% j' \
son for the child’s virilization. At that time, they
5 M# O/ \9 a! S ?" Ddecided to put the baby in a separate bed, and the
! d$ k3 t6 X- G+ Tfather was not hugging him with bare skin and had7 I* g( H0 V6 U% H# l
been using protective clothing. A repeat testosterone
0 T& ^- J' K; |" Xtest was ordered, but the family did not go to the+ B' m+ y& U2 _ `
laboratory to obtain the test.
- ^& W- n/ a7 x3 V& A' eDiscussion
W. h9 n! [$ S% u. p+ OPrecocious puberty in boys is defined as secondary
, L9 m! W4 D0 ^9 j7 Msexual development before 9 years of age.1,45 q" X/ ?5 F' B7 K1 ^
Precocious puberty is termed as central (true) when4 Z; U V, Z: P ~
it is caused by the premature activation of hypo-
: f9 s' k, }+ ?& p/ p: mthalamic pituitary gonadal axis. CPP is more com-) r. J p; z, H
mon in girls than in boys.1,3 Most boys with CPP. | X- d0 t6 X& n, m! P5 _) \
may have a central nervous system lesion that is
- U% O4 f$ P0 P( ]responsible for the early activation of the hypothal-) Z0 b, V# G4 ?& A8 L
amic pituitary gonadal axis.1-3 Thus, greater empha-
% R1 y3 v7 g R1 h H# t5 Isis has been given to neuroradiologic imaging in
2 R/ p: Z2 Z$ F: Vboys with precocious puberty. In addition to viril-
9 n8 U$ y) i+ h6 _' a9 aization, the clinical hallmark of CPP is the symmet-
4 D! p" J' ]" {5 D7 `8 `3 g2 b* prical testicular growth secondary to stimulation by
0 `' Q4 j4 }( }7 Xgonadotropins.1,3
5 ~: \, i% i. J$ r: H# w% J' G0 _Gonadotropin-independent peripheral preco-
# a) U) Y" M4 G7 v) I/ |0 u7 ?! Pcious puberty in boys also results from inappropriate/ D2 k1 Q) A. K, c9 S% H. a
androgenic stimulation from either endogenous or, B* b0 l1 g1 x8 e
exogenous sources, nonpituitary gonadotropin stim-$ ]8 I5 w/ x: e' S6 I k
ulation, and rare activating mutations.3 Virilizing! ]* \7 |' ?$ P0 I0 g& A$ F! I' m: L# w$ \# z
congenital adrenal hyperplasia producing excessive2 s1 g* {) r+ h% } a, u; w; N0 z8 V
adrenal androgens is a common cause of precocious
2 G% q* M! t$ q! O& s) Mpuberty in boys.3,4
0 N8 o; |) X4 L) M; L9 d% WThe most common form of congenital adrenal) |% r' V$ ?% t, I
hyperplasia is the 21-hydroxylase enzyme deficiency.* A2 L" {0 [1 I R q" }: s, u) u1 q
The 11-β hydroxylase deficiency may also result in" M$ O: H- x, k) `: U
excessive adrenal androgen production, and rarely,+ ]: g# h D. u8 c7 S2 `, ?: g
an adrenal tumor may also cause adrenal androgen2 \+ W. R- Z/ Q7 t) i
excess.1,3
7 G/ ?* \# u* a S: _) ^at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 B1 z% M& J3 ~6 k
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
! b2 u7 @+ v- e9 y: k7 I8 yA unique entity of male-limited gonadotropin-
! l$ ^7 {7 \" a o3 [- Y. [$ Nindependent precocious puberty, which is also known
) V" l" ~ X. \as testotoxicosis, may cause precocious puberty at a6 Q1 z J; u- t% C
very young age. The physical findings in these boys
, \5 c- ]; d: f8 t" h. Mwith this disorder are full pubertal development,# c5 @; w! q- _& m, H) q! G
including bilateral testicular growth, similar to boys
. C. Z( r. j" L) g/ h: Owith CPP. The gonadotropin levels in this disorder% Z# f/ m" N, l5 R3 j& L2 ^
are suppressed to prepubertal levels and do not show
3 t8 ?( Q- E2 g! [pubertal response of gonadotropin after gonadotropin-7 S- `$ x6 R5 [- o4 d
releasing hormone stimulation. This is a sex-linked
1 q( r( e5 e3 X, Eautosomal dominant disorder that affects only7 x# s2 ^" a) u
males; therefore, other male members of the family
+ r0 j- J9 K2 H$ Y% o* imay have similar precocious puberty.3
. E1 ? @* X& ~1 o8 F7 wIn our patient, physical examination was incon-; C8 O- p* |5 c$ ]: Q; z0 V/ J
sistent with true precocious puberty since his testi-+ Q; y( D, \- i2 I3 q$ C* i
cles were prepubertal in size. However, testotoxicosis
7 s3 M& p& y, Owas in the differential diagnosis because his father
( F5 p4 m/ y: S0 Pstarted puberty somewhat early, and occasionally,
9 {9 Q% B+ f5 |( ~) T9 Gtesticular enlargement is not that evident in the9 L, v& o/ |3 d, X7 J8 S4 P( a
beginning of this process.1 In the absence of a neg-
2 o# Y; D0 r# T$ d- Qative initial history of androgen exposure, our" i$ s& o2 P$ |4 H; q$ v, U
biggest concern was virilizing adrenal hyperplasia, H" r L; E N% a' p1 N
either 21-hydroxylase deficiency or 11-β hydroxylase
7 p- @; Q3 c, |1 C1 { }0 vdeficiency. Those diagnoses were excluded by find-" J; @& I+ p; J. g# b6 U
ing the normal level of adrenal steroids.
/ i3 K$ O) V0 `: F4 ]- xThe diagnosis of exogenous androgens was strongly2 ^3 ~+ R G M- C/ O
suspected in a follow-up visit after 4 months because! Y6 n3 q: F5 {; v# r9 t* I/ o
the physical examination revealed the complete disap-% O( R9 S0 j, A7 D) v3 |
pearance of pubic hair, normal growth velocity, and5 y0 j$ N( G6 ?8 I0 P7 G+ M4 N( X
decreased erections. The father admitted using a testos-' ~7 @$ k) h+ I8 `3 I" @
terone gel, which he concealed at first visit. He was
( J, a1 T; q% j8 _using it rather frequently, twice a day. The Physicians’1 @5 G0 }3 P; v4 Z$ N1 S
Desk Reference, or package insert of this product, gel or
- ]5 r6 Z+ N4 B, q1 n. lcream, cautions about dermal testosterone transfer to( D: M/ C9 O. h0 @" r( S
unprotected females through direct skin exposure.6 w( f1 d% ?( |
Serum testosterone level was found to be 2 times the
& `% n# {! f( w p. N: M. _baseline value in those females who were exposed to
' N5 W7 x/ w) @' u8 X# Geven 15 minutes of direct skin contact with their male
8 O9 h# }, l; A! I! opartners.6 However, when a shirt covered the applica-
6 K. ~5 E5 ?. d7 }) ~tion site, this testosterone transfer was prevented.
! ~' t& J9 U2 a9 H6 E1 {% L/ hOur patient’s testosterone level was 60 ng/mL,2 l5 V7 X% t9 n, q& O
which was clearly high. Some studies suggest that6 i# ?; o$ T& ]! u' Y( I8 n" i
dermal conversion of testosterone to dihydrotestos-1 j7 S/ |* r8 V" F! \! Y( B3 s
terone, which is a more potent metabolite, is more7 T" [- D$ H$ B' _9 t1 j
active in young children exposed to testosterone
3 O7 l2 o8 d% bexogenously7; however, we did not measure a dihy-
U! T4 L* d' z" @8 Adrotestosterone level in our patient. In addition to
! _* V! M7 j4 O: zvirilization, exposure to exogenous testosterone in2 K, i/ g" S/ l. [0 `4 g
children results in an increase in growth velocity and8 l& B4 L7 v' {& u3 i, Q
advanced bone age, as seen in our patient.
; d; d% j q- z' O. KThe long-term effect of androgen exposure during
0 l0 [) O1 o; z' s6 f/ eearly childhood on pubertal development and final! j+ x$ g$ k5 o7 I0 t' ~. j4 m
adult height are not fully known and always remain1 h3 ~) Q" _; f( o, |# @4 a
a concern. Children treated with short-term testos-7 f6 j& Z( N. o7 v3 C3 o
terone injection or topical androgen may exhibit some1 L( L% C; V E; b
acceleration of the skeletal maturation; however, after6 |6 X0 f. F- Z+ ` p: P/ u
cessation of treatment, the rate of bone maturation
- z) J! x* C7 fdecelerates and gradually returns to normal.8,9
9 ?0 r5 y8 c2 s2 w/ C p) c2 H6 ]There are conflicting reports and controversy
1 e" q0 x, D+ A3 @9 f. kover the effect of early androgen exposure on adult
9 {; ~2 { W% q4 J# _penile length.10,11 Some reports suggest subnormal
0 J! v) ^% i1 g2 w; Z) ?' tadult penile length, apparently because of downreg-
1 ~. o2 l: l! G- ]ulation of androgen receptor number.10,12 However,7 V/ r6 w2 e% b6 q
Sutherland et al13 did not find a correlation between
) t) r8 a0 r' Q2 Pchildhood testosterone exposure and reduced adult
( o( g! Z1 ]$ ?# Mpenile length in clinical studies.7 ]$ [% S8 W6 V4 T; ^- h# M8 W
Nonetheless, we do not believe our patient is
) s% Y; |0 ]+ T/ T! ?going to experience any of the untoward effects from/ G+ E/ ?1 Z* j+ ~- Y/ q
testosterone exposure as mentioned earlier because
+ v0 ]! h" I3 J5 lthe exposure was not for a prolonged period of time.
4 |7 ]& {. X1 WAlthough the bone age was advanced at the time of
* S3 c1 o8 w9 Tdiagnosis, the child had a normal growth velocity at
7 r1 p" m- C: fthe follow-up visit. It is hoped that his final adult4 x4 j% Q; Z3 {
height will not be affected.9 P( w: b, X( a B( a3 J6 X* c
Although rarely reported, the widespread avail-0 T/ k7 S+ O W0 x
ability of androgen products in our society may
3 E; q# C* w( b6 c& C" tindeed cause more virilization in male or female7 A3 k. X$ ~* u( i
children than one would realize. Exposure to andro-6 V$ ]% U0 U% _( F u
gen products must be considered and specific ques-2 @8 Z& V6 {3 Z
tioning about the use of a testosterone product or6 I# j/ E# g& X% z8 d9 ~6 S4 _) z
gel should be asked of the family members during
( F; B! q, Q6 F8 f: c! Zthe evaluation of any children who present with vir-
8 r( T; U7 z# K! ^ilization or peripheral precocious puberty. The diag- |" ~ M- o$ @4 W( U
nosis can be established by just a few tests and by
2 t2 n, [) e0 u, B& Y* z2 cappropriate history. The inability to obtain such a
9 v: r2 G/ ~! |$ vhistory, or failure to ask the specific questions, may7 ]( U2 b" F& i8 O; h3 D/ a
result in extensive, unnecessary, and expensive3 e" e0 o2 a# G! O8 c& H% i
investigation. The primary care physician should be
% _ Y; L. I1 S" k8 x7 d; laware of this fact, because most of these children
4 C" u0 k& q5 H! Cmay initially present in their practice. The Physicians’
) Y" W4 x) d: ]: b" ^' m: [8 N) e2 o- zDesk Reference and package insert should also put a
9 h" \, B# _# o7 N8 e+ S5 _warning about the virilizing effect on a male or
5 T9 u6 D. ^0 D- @6 @ a/ C4 h4 nfemale child who might come in contact with some-$ F3 ]& w% i/ M0 l! Y
one using any of these products.# Q" O: m- `% g' [
References
: i- E5 G) M1 O9 H& I1. Styne DM. The testes: disorder of sexual differentiation8 B5 }& L+ U+ V- z% n* H* m# H
and puberty in the male. In: Sperling MA, ed. Pediatric
# G. F2 z; f# j: S; tEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;$ Q" g- E" c9 T) f
2002: 565-628.) o, n3 f$ E7 E6 D2 ?
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
/ U) d) P+ W( G* y6 G3 \" F" C% Tpuberty in children with tumours of the suprasellar pineal3 t1 c# ^' {, l- L: V u% P
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
\8 A; r3 }3 j) [Topical Testosterone Exposure / Bhowmick et al 543
7 u! K1 n" e6 R/ w, g0 q: ^# c' S1 yareas: organic central precocious puberty. Acta Paediatr.: P7 L. l* u/ D# |
2001;90:751-756.+ P5 O9 r. c9 r! I; z, F Z
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed., r9 K& r( P- P. x) B
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
- M& Y/ D. m: o: H- `Dekker Inc; 2003:211-238.; T3 R0 D# v) P! X2 e: N# J
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual: `0 Y9 U3 _; Y& i
development in a two-year-old boy induced by topical
* ?! w9 z. e3 B! _) s0 Uexposure to testosterone. Pediatrics. 1999;104:e23.0 _6 M& K) n' t4 o1 y- N9 k. H
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
' K G8 Z$ u( l) H1 v1 ^Skeletal Development of the Hand and Wrist. 2nd ed.
$ W# T7 S* g4 I4 @2 D/ WStanford, CA: Stanford University Press; 1959.
+ A. X* p3 S! I6. Physicians’ Desk Reference. Androgel 1% testosterone,
+ n' {0 L* W! d) b2 T3 [6 c: dUnimed Pharmaceutical Inc. Montvale, NJ: Medical; ]& }' K0 | Z2 {) D
Economics Company, Inc; 2004:3239-3241.0 { a4 t5 X' }# ^ s/ l
7. Klugo RC, Cerny JC. Response of micropenis to topical
% T+ Q8 \& i5 I. ^2 btestosterone and gonadotropin. J Urol. 1978;119:
# d* W% n, W2 l% b* J' j. a8 l667-668.' `3 M1 f6 z. R) U9 S ^5 k1 [
8. Guthrie RD, Smith DW, Graham CB. Testosterone! w1 ~+ [/ v8 ~
treatment for micropenis during early childhood. J Pediatr.) |" i. j$ P$ O" E4 ]
1973;83:247-252.
1 V! \# O. ~6 y" G9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
$ L+ k9 U5 i" Y1 V% k1 x1 rtherapy for penile growth. Urol. 1975;6:708-710.
% I# g% z9 G* O `) V, j10. Husmann DA, Cain MP. Microphallus: eventual phallic2 h: ? w9 P R# A+ F. m/ V$ H
size is dependent on the timing of androgen administra-
0 L0 w0 ~- C6 ]tion. J Urol. 1994;152:734-739.0 C2 w& i/ F$ E' r4 H
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
4 w b6 b) |& n& [/ A: x8 {does early treatment with testosterone do more harm, m& f' x; V, j. D6 F9 o1 s
than good? J Urol. 1995;154:825-829.$ o- H. ^& Z0 J
12. Takane KK, George FW, Wilson JD. Androgen receptor, v) v8 j' A% i: t
of rat penis is down-regulated by androgen. Am J Physiol.
+ n" g" W }& H- \1990;258:E46-E50.
, m9 F, C% c) y13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect4 p+ d5 Z8 T9 B6 H$ u7 `
of prepubertal androgen exposure on adult penile/ l& A0 g# S, E1 |5 z% C
length. J Urol. 1996;156:783-787. |
|