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Hemangioblastoma of pelvic cavity: report of a case and review of literature.
[liposarcoma]
Hemangioblastoma
of
soft
tissue
is
a
very
rare
tumor
of
uncertain
histological
type
.
Herein
,
we
reported
a
51
-
year
-old
woman
was
found
to
have
a
solid
and
cystic
mass
measuring
31
×
30
mm
in
the
right
adnexa
area
on
a
computed
tomography
scan
.
The
tumor
showed
the
typical
histology
of
hemangioblastoma
.
Tumor
was
composed
of
numerous
capillaries
and
stromal
cells
with
cytoplasmic
vacuolization
.
Immunohistochemical
study
revealed
that
the
tumor
stromal
cells
were
positive
for
CD
5
6
,
S-
100
protein
,
NSE
,
Syn
,
CgA
,
and
inhibin-α
.
Focal
EMA
positivity
was
present
.
Ki-
67
expression
was
found
in
approximately
1
%
of
tumor
cells
.
The
tumor
cells
were
negative
for
CK
,
HMB-
45
,
Melan-
A
,
SMA
,
and
CD
68
.
The
differential
diagnosis
of
Hemangioblastoma
arising
in
pelvic
cavity
includes
hemangioma
,
hemangioendothelioma
,
liposarcoma
,
renal
cell
carcinoma
,
fat-forming
solitary
fibrous
tumor
,
paraganglioma
,
and
perivascular
epithelioid
cell
tumor
(
PEComa
)
.
Diseases
Validation
Diseases presenting
"soft tissue"
symptom
cushing syndrome
dedifferentiated liposarcoma
erdheim-chester disease
esophageal carcinoma
focal myositis
liposarcoma
lymphangioleiomyomatosis
oligodontia
pleomorphic liposarcoma
proteus syndrome
pyomyositis
trochlear dysplasia
von hippel-lindau disease
waldenström macroglobulinemia
well-differentiated liposarcoma
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