HEMANGIOSSARCOMA CONJUNTIVO-CORNEAL PRIMÁRIO EM CÃO DA RAÇA PITBULL: RELATO DE CASO

Abstract

The hemangiosarcoma is a malignant neoplasm and its corneal presentation is rare in dogs. We report in the present study a case of primary conjunctival hemangiosarcoma with invasion to the cornea in a male Pitbull dog, seven years old and 34 kg, with a history of progressive growth neoformation 3 months ago in the conjunctiva and in the right eye cornea. According to the owner, the animal had red eye, blepharospasm and photophobia. Abdominal ultrasound and chest X-ray revealed no changes, determining the primary character of the eye tumor. The tissue presented integrity of the conjunctival epithelium of bulbar conjunctiva. The lamina propria was diffusely infiltrated by neoplastic proliferation unencapsulated, unquoted and with ill-defined margins. The mass consisted of irregular vascular channels, filled with erythrocytes. The cells forming the neoplastic vessels were large, pleomorphic and varied from elongated to oval, and the area was also positive for anti-factor VIII, a cytoplasmic marker for hemangiosarcoma. Faced with the histopathologic results, immunohistochemical and clinical examination was diagnosed primary conjunctival hemangiosarcoma with invasion to tha cornea. Eleven days after the first visit, the dog was sent to surgery for performing lamellar keratectomy of the affected eye, followed by third eyelid flap. After 15 days of surgery, the third eyelid flap was removed and was observed corneal and conjunctival scarring without signs of recurrence the growing neoformation. The animal is being followed clinically and does not present any changes the period of 200 days.