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Difference between revisions of "Angiosarcoma"
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| Caption = Epithelioid angiosarcoma. [[H&E stain]]. | | Caption = Epithelioid angiosarcoma. [[H&E stain]]. | ||
| Micro = atypical cells - usu. spindle cells, occasionally epithelioid; vascular differentiation (abundant capillaries - "red" at low power, +/-cytoplasmic vacuolization, +/-hobnail endothelial cells) | | Micro = atypical cells - usu. spindle cells, occasionally epithelioid; vascular differentiation (abundant capillaries - "red" at low power, +/-cytoplasmic vacuolization, +/-[[hobnail]] endothelial cells) | ||
| Subtypes = | | Subtypes = | ||
| LMDDx = [[Kaposi sarcoma]], other [[vascular tumours]] | | LMDDx = [[Kaposi sarcoma]], other [[vascular tumours]] | ||
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*Very many small capillaries of irregular shape lined with: | *Very many small capillaries of irregular shape lined with: | ||
**Pleomorphic nuclei - '''important'''. | **Pleomorphic nuclei - '''important'''. | ||
***May have hobnail morphology. | ***May have [[hobnail morphology]]. | ||
**Usually "red" at low power - due to many RBCs - '''important'''. | **Usually "red" at low power - due to many RBCs - '''important'''. | ||
*Mitoses. | *Mitoses. | ||