Non-Neural Granular Cell Tumor

**Semantic type:** Neoplastic Process

**Definition:** A rare, low-grade skin neoplasm of mesenchymal cells of unknown lineage with prominent cytoplasmic granularity. The lesions are most commonly non-ulcerated papules or nodules. Most cases are indolent, despite worrisome histopathologic features. Few cases with regional lymph node metastasis have been reported. (WHO 2018)

**Synonyms:** - Dermal Non-Neural Granular Cell Tumor - PNNGCT - Primitive Non-Neural Granular Cell Tumor - Primitive Polypoid Granular Cell Tumor