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is a significant concern for physicians. Central
/ z% Q0 Z$ i# r5 _* D; J- R/ wprecocious puberty (CPP), which is mediated: a' V) L6 y, J5 b6 [2 x
through the hypothalamic pituitary gonadal axis, has8 K& X) P2 Y$ V
a higher incidence of organic central nervous system, t/ q6 \3 L: C5 K' x
lesions in boys.1,2 Virilization in boys, as manifested
1 a& k0 z! [3 Y7 t' B) v& gby enlargement of the penis, development of pubic
" y; e t& ~, [8 q4 |hair, and facial acne without enlargement of testi-- W+ Z0 v4 Q: v* q1 i3 {
cles, suggests peripheral or pseudopuberty.1-3 We
+ d# }! R9 R0 w i- \. kreport a 16-month-old boy who presented with the
, n2 M8 l- a) b6 K7 j' e# Renlargement of the phallus and pubic hair develop-+ v# q4 B+ N* e* G( d8 L* L
ment without testicular enlargement, which was due9 a# x' U! X6 y; u
to the unintentional exposure to androgen gel used by
4 y7 `2 a0 L' ?- z: ^: a; \& c$ h( ~the father. The family initially concealed this infor-# w+ E" a( ]$ d8 o
mation, resulting in an extensive work-up for this3 O, V, P, t; r; a
child. Given the widespread and easy availability of
( M, Y+ k5 }( A5 z. a1 e2 {1 Etestosterone gel and cream, we believe this is proba-
) d4 l8 F5 Z8 R2 [bly more common than the rare case report in the
& h# L' `, D( N, z" C) ?0 R: Zliterature.41 x& K% I9 o5 T d" \% [- j
Patient Report
' ]3 _" j& I d& F9 K$ P+ D% zA 16-month-old white child was referred to the
$ w( N4 j r. P9 jendocrine clinic by his pediatrician with the concern
, H/ M+ M5 E+ vof early sexual development. His mother noticed, s! d, N9 h! Z& |7 d' r
light colored pubic hair development when he was
2 o0 m* L7 P, F% e1 }From the 1Division of Pediatric Endocrinology, 2University of
# u) G( K) G r5 a+ @0 {) eSouth Alabama Medical Center, Mobile, Alabama.
- _1 F, s' v- G' V# j1 |$ q6 W0 n$ tAddress correspondence to: Samar K. Bhowmick, MD, FACE,
, R" i; x& p+ y1 j8 A: j$ JProfessor of Pediatrics, University of South Alabama, College of
- e& o9 Z& j$ K; @ _) FMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
* F. B) |+ a* b- m& {2 ]e-mail: [email protected].
- S% R& D: Y9 f9 m. Kabout 6 to 7 months old, which progressively became
/ J6 z L% y& p1 j* vdarker. She was also concerned about the enlarge-* G% V" r3 H: `/ S
ment of his penis and frequent erections. The child/ L Y; K$ L5 P' l; m( G0 W
was the product of a full-term normal delivery, with
4 |2 j2 H# t, c3 ^a birth weight of 7 lb 14 oz, and birth length of! R) p u% I; r0 Q0 f+ A* G
20 inches. He was breast-fed throughout the first year
* q, E/ v* a. {. ]) kof life and was still receiving breast milk along with
. P" C3 T8 F6 K: I6 p- Hsolid food. He had no hospitalizations or surgery,+ O [- K' l& M/ @" V
and his psychosocial and psychomotor development
$ g% X$ _1 c& U* Fwas age appropriate.
B% r* @0 \) Z3 T1 VThe family history was remarkable for the father,
0 Z0 i8 A* Z* h1 ywho was diagnosed with hypothyroidism at age 16,4 Q* ]* v* ]% {( D
which was treated with thyroxine. The father’s+ W( w1 x# C$ y
height was 6 feet, and he went through a somewhat
- L4 ^2 [/ q" |* S/ ?early puberty and had stopped growing by age 14.% N( Y( n7 d" V- d- S& E1 k
The father denied taking any other medication. The, H8 I4 ^$ J+ g
child’s mother was in good health. Her menarche6 P/ i: a7 t" p& ?
was at 11 years of age, and her height was at 5 feet- r2 s/ @8 F: v
5 inches. There was no other family history of pre-
2 T, H: l* T! R! ]' zcocious sexual development in the first-degree rela-
* j) Q S- `' k; W: o2 B7 D) btives. There were no siblings.! a# p) U- r+ |
Physical Examination
7 h) E' \+ X! E- n6 qThe physical examination revealed a very active,
1 k- s# K' T1 r; Fplayful, and healthy boy. The vital signs documented
. u, w4 L1 w" H" \6 m0 ~a blood pressure of 85/50 mm Hg, his length was
/ H7 l S( Z, w' n90 cm (>97th percentile), and his weight was 14.4 kg
8 g; g* i# t, j" S! l8 M6 }(also >97th percentile). The observed yearly growth1 D/ ~5 S$ M" y3 n
velocity was 30 cm (12 inches). The examination of" @0 n# V3 O: J% A
the neck revealed no thyroid enlargement.
, z: z6 j2 b1 Z$ ?; u! UThe genitourinary examination was remarkable for9 m2 M6 s* M$ D2 C; ~
enlargement of the penis, with a stretched length of% U# F% S& O0 L; r- T
8 cm and a width of 2 cm. The glans penis was very well
7 K0 h; I2 K4 R3 L4 |developed. The pubic hair was Tanner II, mostly around
, ]2 D4 c. x: V, z% A( z5 U540* G: q# t. Z6 w, x& H% ~# r
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
% N3 ^% z5 |) m+ t: v1 Othe base of the phallus and was dark and curled. The- e# U& B$ c6 o3 a5 o# e
testicular volume was prepubertal at 2 mL each.
2 v% k) d$ S) f pThe skin was moist and smooth and somewhat* U* f- i, l8 g$ s6 P, \
oily. No axillary hair was noted. There were no
8 v% k$ K* O$ T2 `0 h5 iabnormal skin pigmentations or café-au-lait spots.
/ \1 m' A! x) N* @$ `+ CNeurologic evaluation showed deep tendon reflex 2+
! W3 b* N M7 f; s0 Cbilateral and symmetrical. There was no suggestion" ~2 c& ?$ `1 `. ?
of papilledema.
5 D$ C9 i$ u( A# {Laboratory Evaluation1 F3 n9 o4 o* R2 h8 j" n; V
The bone age was consistent with 28 months by
# ~" A2 f0 b3 h/ [5 Z) _using the standard of Greulich and Pyle at a chrono-+ Y- D7 Y8 Q& `) P: q
logic age of 16 months (advanced).5 Chromosomal0 b k' }) P8 Q! }# n
karyotype was 46XY. The thyroid function test6 t4 `0 j+ s' V0 t& t2 Q( b. \4 K
showed a free T4 of 1.69 ng/dL, and thyroid stimu-: h, a7 C6 S. S8 k$ v
lating hormone level was 1.3 µIU/mL (both normal).% G) E4 U. Q- t7 i; w- g) c
The concentrations of serum electrolytes, blood
: w8 a& m+ Q9 T% \8 V% O- J9 Vurea nitrogen, creatinine, and calcium all were' ~5 K, Z" X5 e( ?8 p) x; z. w
within normal range for his age. The concentration j5 h; F1 w- Y& H
of serum 17-hydroxyprogesterone was 16 ng/dL q9 U9 @+ x3 o h, f' y* F( v
(normal, 3 to 90 ng/dL), androstenedione was 20; l) J3 D3 R8 X1 L0 Z
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
5 h4 t6 T1 l# p! ~+ u kterone was 38 ng/dL (normal, 50 to 760 ng/dL),- c5 @! X. h' C s& ~0 q" p6 w
desoxycorticosterone was 4.3 ng/dL (normal, 7 to2 ^' ^$ _( L2 {- F$ ^9 Y1 J. R
49ng/dL), 11-desoxycortisol (specific compound S)
- b7 w5 `& F4 f% l+ x7 x: s+ J" gwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-* h0 y$ a0 e% I3 k- Q: m/ X
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
5 ]8 R$ Q/ `5 Q- |testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
# ]$ x$ H2 W$ Y f wand β-human chorionic gonadotropin was less than+ h4 O. R V) ]+ e! i8 U- ?) W
5 mIU/mL (normal <5 mIU/mL). Serum follicular9 W" `9 X5 `9 h; u
stimulating hormone and leuteinizing hormone
- b9 A' r* M$ D2 u2 Cconcentrations were less than 0.05 mIU/mL0 b+ E% h7 {7 }" Y2 g8 }4 I* a
(prepubertal).
' F; t3 a' P$ d$ ?! d6 c6 LThe parents were notified about the laboratory
" y0 `5 r k A& y1 _; A6 d1 a, bresults and were informed that all of the tests were; B% t. O; l" K+ t5 I o
normal except the testosterone level was high. The$ } a9 u. h5 U
follow-up visit was arranged within a few weeks to. H, m8 {4 l' \; P6 k/ i
obtain testicular and abdominal sonograms; how-4 J0 k: Y3 i* i2 Z. Q, i
ever, the family did not return for 4 months.
/ h' e* T0 g$ w0 v+ yPhysical examination at this time revealed that the& I) T/ V. i0 _/ h% _
child had grown 2.5 cm in 4 months and had gained
% S1 ?6 Q- S W; u1 a2 kg of weight. Physical examination remained. h( b/ y; e" ^+ z F3 M
unchanged. Surprisingly, the pubic hair almost com-
6 k9 b: C3 J: x; U/ W ]3 l4 xpletely disappeared except for a few vellous hairs at* ^; j( Q2 H- d& g; i
the base of the phallus. Testicular volume was still 2
5 s) P9 }5 {! z0 cmL, and the size of the penis remained unchanged.3 D6 _5 P- p! A9 y$ W6 |# J9 {; t- r
The mother also said that the boy was no longer hav-# W+ R$ j$ M0 f
ing frequent erections.4 a$ s5 |" a# S" T
Both parents were again questioned about use of/ ]6 k1 Z9 s" P h% ]
any ointment/creams that they may have applied to G8 P0 o2 X9 u, F+ p
the child’s skin. This time the father admitted the
g: p+ p# {6 d8 f8 B8 ] {3 dTopical Testosterone Exposure / Bhowmick et al 541, z1 l8 x! B; V( r6 n" @" L
use of testosterone gel twice daily that he was apply-
% Y$ k! f" H) u) ring over his own shoulders, chest, and back area for
9 p* `- e. @9 w' Pa year. The father also revealed he was embarrassed
* n3 G q7 D! l8 k) s3 G X; H& |to disclose that he was using a testosterone gel pre-
, y0 e7 i" `5 j3 x: v3 w9 ]scribed by his family physician for decreased libido
' x# ?1 F: o* Q6 { g; asecondary to depression.6 U" Q/ e" z: ?9 s" q5 w
The child slept in the same bed with parents.# V. ^+ O2 Q; z
The father would hug the baby and hold him on his
6 Q6 A# e3 X% G- ]4 j$ xchest for a considerable period of time, causing sig-1 f. u5 L5 \9 @3 m' G! ]0 \
nificant bare skin contact between baby and father.% w2 z2 T# n x8 o4 j- N$ Y
The father also admitted that after the phone call,
( ^2 Y9 Q$ j/ v: b- C9 {" Zwhen he learned the testosterone level in the baby
. a* N8 c0 Z# m: v$ N0 {$ k4 Wwas high, he then read the product information3 c( Z- B r! X
packet and concluded that it was most likely the rea-: U, W; D/ ~: E0 R2 [: \9 ?: a
son for the child’s virilization. At that time, they% v8 y N$ D8 p7 G8 m# G# O: A/ n
decided to put the baby in a separate bed, and the
( I! s9 t0 b$ A7 z0 s$ Ifather was not hugging him with bare skin and had. J. R+ `3 K0 B4 R, T4 q# h# H, N5 P
been using protective clothing. A repeat testosterone
9 \ T6 w+ {3 A1 o7 b* |test was ordered, but the family did not go to the+ I# x% \2 t4 |+ Z
laboratory to obtain the test.
8 j. B# q- F# |9 fDiscussion8 Y5 n# G* p" l$ H5 r
Precocious puberty in boys is defined as secondary
3 _" S7 s0 L! t- j( M8 n0 G' lsexual development before 9 years of age.1,4! }& p" g! J) K: V {/ E
Precocious puberty is termed as central (true) when
* a- m( \6 X8 Tit is caused by the premature activation of hypo-
- Z, T. q5 i; x# Ethalamic pituitary gonadal axis. CPP is more com-
1 C& N; i9 c1 p5 g% ^2 t! xmon in girls than in boys.1,3 Most boys with CPP
x- @7 [# ^1 Z* f% R, T+ z) r2 Gmay have a central nervous system lesion that is4 G' [4 ~" M/ K! M+ G2 {
responsible for the early activation of the hypothal-
# i; M$ ?1 D7 {# P& P$ Eamic pituitary gonadal axis.1-3 Thus, greater empha-
6 w" m% f# ?! k% m5 i! wsis has been given to neuroradiologic imaging in) G1 R- \' u+ R! e' F
boys with precocious puberty. In addition to viril-2 t/ C' x9 C4 r. \" G6 [% c
ization, the clinical hallmark of CPP is the symmet-6 V( V2 f2 v; c
rical testicular growth secondary to stimulation by
. H' T& u: E3 [gonadotropins.1,3
5 o {# ?8 Y/ d z6 p) @6 vGonadotropin-independent peripheral preco-0 F, q* \, S8 }/ X* m
cious puberty in boys also results from inappropriate
, `( B+ n$ S; B, W6 b* k- dandrogenic stimulation from either endogenous or5 ?& F. ~$ H$ O( F
exogenous sources, nonpituitary gonadotropin stim- `! z7 `- v! R' @! |
ulation, and rare activating mutations.3 Virilizing" T5 x5 b) g. t2 \
congenital adrenal hyperplasia producing excessive
0 j% k/ h: j1 G! P8 w$ Oadrenal androgens is a common cause of precocious
1 ^4 d; y9 S3 @" L+ |* d7 Hpuberty in boys.3,4
0 b8 ^7 G! v5 V! J) bThe most common form of congenital adrenal
$ E) `6 e6 I5 P7 Shyperplasia is the 21-hydroxylase enzyme deficiency.
$ D0 i2 s( X# wThe 11-β hydroxylase deficiency may also result in* z% v0 ^4 F9 Q
excessive adrenal androgen production, and rarely,
$ C( S2 C `3 Y' U: C/ y' H. Fan adrenal tumor may also cause adrenal androgen4 m% ?6 f' ?# y ?4 L2 E
excess.1,3: v: o/ F O: o; |: P% l
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% y) E- u) ^& {" A
542 Clinical Pediatrics / Vol. 46, No. 6, July 20072 u# e1 ^3 |2 }& f
A unique entity of male-limited gonadotropin-
1 \% \! U" X' f: p' {- k6 T iindependent precocious puberty, which is also known
& U$ A* g% ~, J/ |& ^. \as testotoxicosis, may cause precocious puberty at a
( L; d0 `2 ^& x3 P9 L# C) b/ `very young age. The physical findings in these boys9 H" e1 h1 U- G2 f$ N
with this disorder are full pubertal development,. k% O" r& M+ d
including bilateral testicular growth, similar to boys( O E" r7 G E& z2 ^, m: M. O, Q
with CPP. The gonadotropin levels in this disorder
2 z; s' v7 x3 Sare suppressed to prepubertal levels and do not show9 t3 ^1 E1 ] G3 i8 ~9 G
pubertal response of gonadotropin after gonadotropin-
4 V3 T, d+ v0 }1 E/ ?* areleasing hormone stimulation. This is a sex-linked
. |" g1 c: Y: o6 G, Iautosomal dominant disorder that affects only2 F" J2 Y, n6 \. }/ Q) i, n( Y: m
males; therefore, other male members of the family$ @, g3 y' }& Z& Q1 w2 C* s) v
may have similar precocious puberty.3' r- ~5 a+ s' ^
In our patient, physical examination was incon-9 L4 ~3 ~" |9 O& v8 F
sistent with true precocious puberty since his testi-# `3 O7 g ]& K7 w
cles were prepubertal in size. However, testotoxicosis8 ~% Z/ C. v4 _1 p9 T8 w
was in the differential diagnosis because his father
9 ~& a% p& y/ Z: ]9 d4 istarted puberty somewhat early, and occasionally,4 r7 Q; q; O& j' `1 c$ [' G
testicular enlargement is not that evident in the
5 y3 ]) _5 e8 x& ]3 F9 Z$ Gbeginning of this process.1 In the absence of a neg-" w* I5 y" M) P& `0 v% {
ative initial history of androgen exposure, our- m) [) t' i! {5 R/ K
biggest concern was virilizing adrenal hyperplasia, X% `1 F- U" }
either 21-hydroxylase deficiency or 11-β hydroxylase# w' r* G+ H/ H a3 X. k
deficiency. Those diagnoses were excluded by find-
8 \! N0 D' ^9 v$ I: Uing the normal level of adrenal steroids.; D* H! S# `5 L- m; B) r
The diagnosis of exogenous androgens was strongly1 J6 \* I; e$ T1 m6 `3 ?
suspected in a follow-up visit after 4 months because2 I* w$ K, A) n: n/ t1 k* o
the physical examination revealed the complete disap-
% k& F% w* A+ `, mpearance of pubic hair, normal growth velocity, and# |1 j K/ K% I: J( K$ d
decreased erections. The father admitted using a testos-$ f+ }5 P6 F* |! u6 v
terone gel, which he concealed at first visit. He was
) ]3 |+ e" C+ W C$ fusing it rather frequently, twice a day. The Physicians’
& A! B Y' G7 f- j4 ]3 VDesk Reference, or package insert of this product, gel or1 J4 r6 ^* q1 Z) j1 V" `
cream, cautions about dermal testosterone transfer to
* h, g% f- ^# T6 f. Y5 iunprotected females through direct skin exposure.
6 o) J0 C0 E* F; }! ]& |7 Z5 g- MSerum testosterone level was found to be 2 times the
! Z" U' {% |8 `" W% l/ X: ~baseline value in those females who were exposed to' T/ c( L+ v4 B3 L$ z5 h$ S2 B
even 15 minutes of direct skin contact with their male' s, I: Q1 H0 Q/ a5 x+ H+ P* x) i
partners.6 However, when a shirt covered the applica-" ^( G2 s* O# I! R& B5 i/ \4 R8 @
tion site, this testosterone transfer was prevented.) A9 y2 p, j' P
Our patient’s testosterone level was 60 ng/mL,$ ?" I; [1 j* F; G/ ~3 U& h" y+ G
which was clearly high. Some studies suggest that" T! ^$ ^2 k8 r3 t7 u5 D' F4 q+ f7 Q
dermal conversion of testosterone to dihydrotestos-0 \% D) B+ L$ |6 Z' e# ?
terone, which is a more potent metabolite, is more
4 ~$ i# |: V8 V% Gactive in young children exposed to testosterone
4 f* j5 M3 {6 @$ B& sexogenously7; however, we did not measure a dihy-
3 }0 m( F* \" K0 S* D" \drotestosterone level in our patient. In addition to5 N7 x, k1 _! F0 u j2 ~5 R
virilization, exposure to exogenous testosterone in- H9 x" b% G2 ?
children results in an increase in growth velocity and
) z# ~; A& U' X- ~* L" oadvanced bone age, as seen in our patient.
' W) s' {" {$ |8 X/ ?. V% ]' {The long-term effect of androgen exposure during
- q* ]: k/ k$ R$ Bearly childhood on pubertal development and final
- c/ r: V$ {4 A, |0 `8 u- ]6 C0 dadult height are not fully known and always remain9 y& X2 ?2 G& ^% z
a concern. Children treated with short-term testos- m+ B' y. N) u: F( x4 r2 D
terone injection or topical androgen may exhibit some6 j G: N) c) c
acceleration of the skeletal maturation; however, after
8 c0 T4 N( i6 Y- c) j" U" bcessation of treatment, the rate of bone maturation
$ |5 p, m. J7 F: Y" k* n+ j$ Wdecelerates and gradually returns to normal.8,94 L- N6 P$ e; Q2 U
There are conflicting reports and controversy
6 N& `" u0 e% f) I) C+ L( e5 `over the effect of early androgen exposure on adult
2 f2 \( F; V. { W2 hpenile length.10,11 Some reports suggest subnormal& W6 h% v. X3 S3 x
adult penile length, apparently because of downreg-
1 j0 ^1 g2 P, }2 v! n1 \% Iulation of androgen receptor number.10,12 However,. P3 P; C9 n; s, H9 |4 e
Sutherland et al13 did not find a correlation between
8 V' Q M. }8 Jchildhood testosterone exposure and reduced adult
9 h' d9 W; \, L# |penile length in clinical studies.6 u [2 M2 y- F. f
Nonetheless, we do not believe our patient is
$ P# P' |& ^3 A4 j8 |going to experience any of the untoward effects from
& X4 w' i6 O( O! ^; v8 B4 L9 Otestosterone exposure as mentioned earlier because% x) M2 g. z$ e* p0 P
the exposure was not for a prolonged period of time.
' |4 y+ ?, Z6 ?5 x' y# aAlthough the bone age was advanced at the time of' T: i6 y) J2 [
diagnosis, the child had a normal growth velocity at# `. |* M5 a) J' B+ R! @
the follow-up visit. It is hoped that his final adult3 X f* N; d2 N& w3 r# S% d. i* O5 E
height will not be affected.( c/ n- F3 s7 M( ~- V# w
Although rarely reported, the widespread avail-7 Z `) P* @3 x# @; b/ L
ability of androgen products in our society may1 v5 F2 i' F! T' L* W' i
indeed cause more virilization in male or female8 c7 w+ J3 ^# b) C+ A8 |, c' o
children than one would realize. Exposure to andro-
: A7 F* I$ F1 |* H+ {6 Hgen products must be considered and specific ques-
( E3 `/ S8 v8 h3 btioning about the use of a testosterone product or
7 o" ~% Q1 `1 n3 v0 `gel should be asked of the family members during# ^, E) T- i5 x1 `3 }
the evaluation of any children who present with vir-9 j/ ?1 U- q- r. ?9 X
ilization or peripheral precocious puberty. The diag-" F" S3 Q: \- E( x+ g$ ^* z, [
nosis can be established by just a few tests and by
2 d1 U$ ?$ y( \& K: D; S5 S2 c! Xappropriate history. The inability to obtain such a+ q$ T3 h7 }' x5 K, s
history, or failure to ask the specific questions, may
- w( B) G6 R: U, G. }' W2 V0 _result in extensive, unnecessary, and expensive
3 ?" |8 c9 F9 H; H. [investigation. The primary care physician should be0 I5 b2 s/ a5 ?- f
aware of this fact, because most of these children
+ Y3 r% y5 y# X' qmay initially present in their practice. The Physicians’8 a9 J, t3 q5 r4 Z: ^; A; } ~' p
Desk Reference and package insert should also put a
8 c! H5 T& k: N" R9 gwarning about the virilizing effect on a male or
# l0 z+ }9 l6 L0 i- ]8 Y) o* y4 Xfemale child who might come in contact with some-
. F# I2 ]+ h8 b( D& j9 \$ ?one using any of these products.
- E9 B" W1 _3 }, A7 T5 ^References
, L" |' f3 N4 H: z: `1. Styne DM. The testes: disorder of sexual differentiation7 p$ k: z9 `- i5 X- t6 u% v, o$ a- o
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/ H% p9 k& {; I6 h* t( W# A. E2002: 565-628.
7 J' F8 T4 a; D) Z# L2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
9 g9 {; }* G4 m5 x. P# }# @6 ?4 U: jpuberty in children with tumours of the suprasellar pineal
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* G; k8 i# l; R$ q! kareas: organic central precocious puberty. Acta Paediatr.4 M+ d7 V" x+ G% L: P
2001;90:751-756.
& }3 d8 [' A) V0 p3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.$ d; b' O" L6 U/ T, n: Q, f
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
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4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
, d+ i; U, P: W1 zdevelopment in a two-year-old boy induced by topical
5 B' j) p" [# O3 Eexposure to testosterone. Pediatrics. 1999;104:e23." Z! e4 L1 O' @4 S2 N& d5 i
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
( I2 q5 Z. {6 E( [& i" |4 fSkeletal Development of the Hand and Wrist. 2nd ed.
: b1 {/ l! n1 _! `) W6 dStanford, CA: Stanford University Press; 1959.7 ^& l( A+ e/ K
6. Physicians’ Desk Reference. Androgel 1% testosterone,7 U4 Q$ \) b. {) p* d
Unimed Pharmaceutical Inc. Montvale, NJ: Medical$ J7 B/ G& D) t! y3 R7 v
Economics Company, Inc; 2004:3239-3241.
/ b% [, X7 l3 c f7. Klugo RC, Cerny JC. Response of micropenis to topical
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