Cranial Nodular Fasciitis

**Semantic type:** Neoplastic Process

**Definition:** A rare, self-limiting, rapidly growing, non-encapsulated benign osteolytic neoplasm that arises from the cranium. It is characterized by the presence of plump spindle-shaped fibroblasts, multinucleated osteoclast-like giant cells, chronic inflammatory infiltrate, red blood cell extravasation, and high mitotic activity.

**Synonyms:** - Cranial Pseudosarcomatous Fasciitis