<prompt> A man presents with mass at duodenojejunal flexurs invading renal papillae. Histopathology repos it as lymphoma; true statement is:II E stageIII E StageIV E stageStaging cannot be done until bone marrow examination is performed  <response>: Involvement of another organ kidney by GI lymphoma of duodenojejunal flexure classifies it as a stage IV lymphomaGI lymphomas are staged using a modified Ann Arbor classification:IE: tumor confined to small intestineIIE: spread to regional lymph nodesIIIE: spread to non-resectable nodes beyond regional nodesIVE: spread to other organsref: Meningot 10e p1181 