Ann Arbor Stage IV B-Cell Non-Hodgkin Lymphoma

**Semantic type:** Neoplastic Process

**Definition:** Ann Arbor Classification: Stage IV: Diffuse or disseminated involvement of one or more extralymphatic organs, with or without associated lymph node involvement; or isolated extralymphatic organ involvement in the absence of adjacent regional lymph node involvement, but in conjunction with disease in distant site(s); or any involvement of the liver or bone marrow, lungs (other than by direct extension from another site), or cerebrospinal fluid.

**Synonyms:** - B Cell Lymphoma Stage IV - B-Cell Lymphoma Stage IV - Stage IV B Cell Lymphoma - Stage IV B-Cell Lymphoma - Stage IV B-Cell Non-Hodgkin Lymphoma - Stage IV B-Cell Non-Hodgkin Lymphoma - Stage IV B-Cell Non-Hodgkin's Lymphoma