Feline fibrosarcoma

Cat after the radical removal of an 860 g fibrosarcoma

The feline fibrosarcoma represents approximately 40% of the time the second most common skin cancer form in cats . Here, it is assumed that a relationship of tumor formation with injections there. Tumors often form in the areas of the cat's body that are preferably used for attaching the vaccination needle, i.e. on the side chest wall, in the neck area or the upper area of ​​the hind legs.

Since auxiliary substances of the FeLV vaccine have often been found in fibrosarcomas, fibrosarcomas are often referred to as vaccine-associated sarcomas (“vaccine sarcoma ”). However, they also occur at locations other than the vaccination sites and are probably promoted by local inflammatory reactions following skin injuries. The prevalence of the disease is 0.01 to 0.036 percent. The tumors are malignant and, if left untreated, will kill the cat. The tumor is less likely to develop distant metastases; rather, it grows locally infiltratively into the surrounding tissue. The formation of a pseudocapsule often gives it the appearance of a good demarcation from the surrounding tissue. The only possibility of therapy so far has been the surgical removal of the tumor. If the pseudocapsule is removed alone, this treatment hardly gives satisfactory results, since the tumor grows back in about 70% of all cases.

A radical surgical procedure, in which a distance of at least 3 cm from the palpable tumor is kept on all sides, achieves significantly better results. Deep tissue is also removed generously (parts of the chest wall and even ribs if necessary). This type of surgery is quite demanding due to the tissue defects that occur and should only be performed by experienced surgeons. If the tumor occurs on extremities, amputation is usually the treatment of choice. Radiation treatments and various chemotherapy protocols are possible as additional therapy .

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  Feline fibrosarcoma (2012)

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  X-ray (2013)

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  Pseudocapsule (2014)

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  Close up (2014)

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  By distance (2014)

literature

• Marian C. Horzinek, Vera Schmidt, Hans Lutz (Ed.): Diseases of the cat . 4th, revised edition. Enke Verlag , Stuttgart 2005, ISBN 3-8304-1049-2 .

Web links

Commons : Fibrosarcoma  - Collection of Pictures, Videos and Audio Files

• Study on feline fibrosarcoma in cooperation between LMU and TU Munich
• General information on vaccination sarcomas from the Medical Veterinary Clinic of the LMU Munich
• Vaccine-Associated Feline Sarcoma Task Force
• Martin Kessler : Vaccine-associated fibrosarcomas in cats

Individual evidence

1. ↑ ^{a b} Martin Kessler: Small animal oncology: diagnosis and therapy of tumor diseases in dogs and cats . Georg Thieme Verlag, 2012, ISBN 978-3-8304-1207-6 , p. 230–.