ACTA OTO-LARYNGOLOGICA CASE REPORTS, cilt.9, sa.1, ss.47-52, 2024 (ESCI)
destructive behavior, characterized by high mortality rates. We presented the cyto-histopathological
findings of an angiosarcoma case of primarily thyroid origin. A 39-year-old female patient was
presented with thyroid tumor appeared as hemorrhagic, non-encapsulated, with focal cystic
nodules. Histological appearance of the tumor included vascular-like spaces lined with large
epithelioid cells staining positively with factor VIII, CD31. These vascular-like spaces contained
erythrocytes. Retrospective cytology showed that malignant endothelial cells were arranged in
loosely cohesive clusters. These cells had abundant cytoplasm, distinct nucleoli, irregular contoured
and hyperchromatic oval nuclei. This is one of rare cases of primary thyroid angiosarcoma with
sufficient cytological material, showing macroscopic and histopathological findings with
liquid-based cytology. For the diagnosis of thyroid primary angiosarcoma in aspiration, cytological
findings should be evaluated with immunohistochemical methods or, if possible, together with
histopathological findings.