Anaplastic ependymoma, light micrograph. Classic ependymoma is a well-circumscribed and a cellular neoplasm with sheet-like growth pattern. The tumour cells are frequently arranged around blood vessels creating perivascular pseudorosettes. Vast majority of ependymomas are infratentorial and involve the 4th ventricle, mostly in children. The diagnosis of anaplastic ependymoma (WHO Grade III) requires hypercellularity, cytologic atypia, increased mitotic activity, and microvascular proliferation. The image shows highly anaplastic tumour cells arranged around a vessel creating a pseudorosette. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / WEBPATHOLOGY |
Bildgröße: | 4096 px × 3200 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |