Malignant perineurioma
Malignant perineurioma
Definition
A very rare malignant tumor with morphologic features similar to those of benign perineurioma of soft tissue along with hypercellularity, nuclear atypia, hyperchromasia, and a high mitotic rate.
Also known as malignant peripheral nerve sheath tumor with perineurial differentiation, malignant peripheral nerve sheath tumour with perineurial differentiation, perineurial malignant peripheral nerve sheath tumor, perineurial malignant peripheral nerve sheath tumour, perineurioma, malignant — per MONDO