LINFOMA CONJUNTIVAL LINFOCÍTICO DE IMUNOFENÓTIPO T EM UM FELINO – RELATO DE CASO

Abstract

Lymphoma is the most common neoplasm of the hematopoietic system in cats, with a multifactorial origin that can involve different organ systems and can be classified according to the anatomical site of onset (nodal and extranodal), degree of malignancy (low, intermediate and high degree ) and immunophenotype (B or T cells). The diagnosis of this type of neoplasia can be obtained through the use of complementary exams that range from imaging techniques such as x-ray and ultrasound, to laboratory techniques involving cytology, histopathology and immunohistochemistry. The present study aims to report a case of conjunctival lymphoma in a cat showing the means used to reach the diagnosis as well as describe the protocol chosen for chemotherapy treatment. A 6-year-old male, mongrel race feline exhibited a slow growing nodule in the region of the dorsal conjunctiva of the right eye approximately 2.0 cm in diameter, firm consistency, irregular surface, ulcerated and reddish color. After an accurate clinical evaluation and with the aid of complementary tests such as fine needle aspiration (FNA) and histopathological examination, a definitive diagnosis of low grade lymphoma was reached. And through the immunohistochemical examination it was verified that the origin of this neoplasia is of T cells. Through this work it is possible to confirm the importance of such examinations in the oncologic patient as a way of obtaining diagnosis and consequently choice of the appropriate and effective chemotherapeutic protocol promoting increase the life expectancy and welfare of the animal.