Hemangiossarcoma esplénico numa cadela ovariohisterectomizada

Abstract

This report describes the activities carried out in the supervised pre-professional internship in Veterinary Medicine, from December 4, 2023 to March 4, 2024 at the VAL clinic, located in the city of Maputo. The activities carried out consisted mainly of monitoring clinical cases, surgical interventions and carrying out complementary examinations (haematology, stool examination, urinalysis, X-ray and ultrasound). The most attended activities were deworming and vaccinations (88%) and the most attended consultations were otitis (8%) and gastroenterology (4%). A clinical case of splenic haemangiosarcoma was described in an ovariohysterectomised female dog, resulting from a cross between Labrador and Rhodesian Ridgeback breeds, aged 11 years, whose main complaint was lack of appetite and apathy. On physical examination, pink mucous membranes and abdominal distension were observed, which were firm on palpation of the right side. On hematologic examination, thrombocytopenia was observed, and biochemical examination revealed hyperglobulinemia. On ultrasound, masses with a hypoechoic appearance were observed at the level of the spleen. After opening the abdominal cavity, two nodules were observed, a larger one measuring 20 centimeters in diameter on the parietal surface, ventral end of the spleen, which occupied one third of the organ, and a smaller one measuring 3 cm in diameter located on the parietal surface, close to the cranial edge, with a morphological appearance similar to the larger nodule. Due to the involvement of the spleen, a splenectomy was performed, where it was surgically removed and sent to the Pathological Anatomy Laboratory of the Veterinary School for histopathological examination. Microscopic examination of the histological preparations revealed neoplastic proliferation of mesenchymal cells, proliferation of vascular neoformations of different sizes, extensive areas of eosinophilic fibrillar material interspersed with neoplastic cells and red blood cells, and the presence of macrophages containing a brownish pigment in the cytoplasm. Histopathological examination led to the definitive diagnosis of splenic hemangiosarcoma. Due to its location, absence of apparent signs and metastases, it was classified as stage I neoplasia.(TRADUÇAO NOSSA)