NCIt definition : Stage IVA includes: (Any T, Any N, M1a, Any G); (Any T, Any N, M1b, G1). M1a: Intraperitoneal
acellular mucin, without identifiable tumor cells in the disseminated peritoneal mucinous
deposits. M1b: Intraperitoneal metastasis only, including peritoneal mucinous deposits
containing tumor cells. G1: Well differentiated. (AJCC 9th ed.);