Rectum Lymphoma, also known as lymphoma of rectum, is related to extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue and lymphoma. An important gene associated with Rectum Lymphoma is ACR (Acrosin), and among its related pathways/superpathways are Hematopoietic Stem Cells and Lineage-specific Markers and Innate Lymphoid Cells Differentiation. Affiliated tissues include colon and lung.