Caption |
Tail: the mass is composed of solid and papillary areas separated by empty or blood-filed slit-like spaces with a few cystic areas filled with blood. Neoplastic cells are supported by a small amount of hyalinized stroma. Neoplastic cells are histiocytoid, with indistinct cell borders and a moderate amount of strongly acidophilic cytoplasm. The nucleus is central, oval, medium-sized, normochromatic, and with a medium-sized central basophilic nucleolus. Anisokaryosis and anisocytosis are mild. Mitoses are not detected on this photomicrograph. |