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Overview:
A fibrosarcoma is an
aggressive type of malignant growth (cancer) that originates in the fibrous
connective tissue. It is one of the most common
musculoskeletal cancer found in cats.
There are three causes
of fibrosarcoma.
-
It is found in older
cats, of which the cause isn't known, although cancers appear to be
more common in older cats. This is usually a single, irregularly
shaped mass found on the trunk, legs & ears.
-
The use of vaccines
is known to cause fibrosarcoma in rare cases, and this is known as
'vaccine induced sarcoma or vaccinosarcoma'. More information can be
found
here.
-
Finally, a mutant
form of FeLV known as 'feline sarcoma virus' (FeSV) also causes
fibrosarcoma. This is found in younger cats & occurs as multiple
tumour masses.
What
are the symptoms of fibrosarcoma in cats?
The most common sign of
fibrosarcoma is localised soft tissue swelling.
Lameness is
How
is it diagnosed?
Your veterinarian will
perform a complete physical examination & obtain a history from you.
Some tests he may wish to perform include;
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Complete
blood count.
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Biochemical profile.
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Urinalysis.
-
Biopsy of the lump
will provide a definite diagnosis of fibrosarcoma.
-
X-rays of the area in
which the lump is located which may reveal a large, soft tissue mass.
-
X-rays of the lungs
to determine if the cancer has metastasised (spread).
How
is it treated?
-
Surgical excision of
the affected area or amputation of the affected limb. However,
prognosis is guarded as this cancer commonly returns.
-
Radiation therapy to
follow on.
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