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Prostatic adenocarcinoma metastatic to pleomorphic liposarcoma, a "collision phenomenon": report of a case with review of pelvic collision tumors.
[pleomorphic liposarcoma]
"
Collision
tumor
"
is
an
uncommon
phenomenon
characterized
by
coexistence
of
two
completely
distinct
and
independent
tumors
at
the
same
site
.
Collision
tumors
have
been
reported
in
different
sites
in
the
body
;
however
,
these
are
particularly
uncommon
in
the
pelvic
cavity
.
A
70
-
year
-old
man
,
with
prior
history
of
urothelial
and
prostate
cancer
,
presented
with
a
large
pelvic
mass
detected
on
imaging
studies
.
Pathological
examination
revealed
a
large
liposarcoma
with
prostatic
carcinoma
embedded
in
it
.
Immunohistochemistry
and
florescence
in
situ
hybridization
studies
were
performed
to
reach
to
a
conclusive
diagnosis
.
To
the
best
of
our
knowledge
,
this
is
the
second
case
reported
till
date
.
We
present
the
challenges
encountered
in
the
diagnosis
of
this
case
and
review
of
pelvic
collision
tumors
.
Diseases
Validation
Diseases presenting
"prostate cancer"
symptom
adrenal incidentaloma
congenital adrenal hyperplasia
dedifferentiated liposarcoma
esophageal squamous cell carcinoma
lymphangioleiomyomatosis
pleomorphic liposarcoma
proteus syndrome
severe combined immunodeficiency
This symptom has already been validated