Stage M1 Embryonal Tumor with Multilayered Rosettes

**Semantic type:** Neoplastic Process

**Definition:** Microscopic tumor cells are detected in the cerebrospinal fluid. (Chang CH, Housepian EM, Herbert C. Radiology, 1969; 93(6):1351-9.)

**Synonyms:** - M1 Embryonal Tumor with Multilayered Rosettes