Alveolar Rhabdomyosarcoma

**Semantic type:** Neoplastic Process

**Definition:** A rapidly growing rhabdomyosarcoma characterized by the presence of round cells with myoblastic differentiation and a fibrovascular stroma resembling an alveolar growth pattern. The tumor usually presents in the extremities.

**Synonyms:** - ARMS - ARMS - Alveolar rhabdomyosarcoma - Alveolar rhabdomyosarcoma - Monomorphous Round Cell Rhabdomyosarcoma - alveolar rhabdomyosarcoma