Stage M2 Atypical Teratoid/Rhabdoid Tumor

**Semantic type:** Neoplastic Process

**Definition:** Gross nodular seeding is detected in the cerebellar/cerebral subarachnoid space or in the third or lateral ventricles. (Chang CH, Housepian EM, Herbert C. Radiology, 1969; 93(6):1351-9.)

**Synonyms:** - M2 Atypical Teratoid/Rhabdoid Tumor