Canine angiosarcoma : cytologic, histologic, and immunohistochemical correlations
BACKGROUND: Angiosarcomas (AS) are malignant tumors that arise from vascular endothelial cells and are common in dogs. Histologically, AS are markedly heterogeneous neoplasms that make interpretation by cytology difficult
| Veröffentlicht in: | Veterinary clinical pathology. - 1975. - 34(2005), 1 vom: 04., Seite 28-34 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2005
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| Zugriff auf das übergeordnete Werk: | Veterinary clinical pathology |
| Schlagworte: | Journal Article |
| Zusammenfassung: | BACKGROUND: Angiosarcomas (AS) are malignant tumors that arise from vascular endothelial cells and are common in dogs. Histologically, AS are markedly heterogeneous neoplasms that make interpretation by cytology difficult OBJECTIVE: Our objective was to evaluate the cytologic features of canine AS and look for additional diagnostic criteria METHODS: Cytologic specimens from 19 histologically and immunohistochemically confirmed cases of canine AS were extensively reviewed for cytologic features. We compared cytologic, histopathologic, and immunohistochemical findings RESULTS: Neoplastic cells in 14 cytology specimens had a high-grade sarcomatous appearance, whereas in 4 specimens the cells were extremely pleomorphic, ranging from sarcomatous to epithelioid. In the remaining case, the neoplastic cells were low grade, spindle shaped, and monomorphic. Other relevant cytologic findings were blood contamination (18/19 cases), cellular cohesiveness (16/19), punctate cytoplasmic vacuolation (19/19), background neutrophilia (11/19) and eosinophilia (5/19), erythrophagocytosis (8/19), extramedullary hematopoiesis (8/19), and apoptotic leukocytes (14/19). Vasoformative features (ie, pseudoacinar structures) were observed in 7 of 19 samples. Histologically, 16 neoplasms had a proliferative pattern typical of well-differentiated canine AS. Three tumors were atypical poorly differentiated AS; 2 of these had a striking epithelioid pattern and 1 was a poorly differentiated spindle cell tumor with focal vascular differentiation. Immunohistochemically, tumor cells in 16 cases were positive for both endothelial markers tested (Factor VIII-related antigen [FVIII-ra] and CD31 antigen), 2 were positive for CD31 only, and 1 was positive for FVIII-ra only. The epithelioid AS were negative for cytokeratins CONCLUSIONS: The cytologic characteristics of canine AS are widely heterogeneous, but supplementary findings can provide clues that are useful for making a cytologic diagnosis. Histologic and immunohistochemical confirmation is nonetheless warranted in all cases |
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| Beschreibung: | Date Completed 28.06.2005 Date Revised 31.03.2022 published: Print Citation Status MEDLINE |
| ISSN: | 1939-165X |