title: [A case of follicular medium-sized cell lymphoma (FM) developing into leukemia, progressing to diffuse small cell lymphoma (DS), and co-existing with the foci of diffuse mixed lymphoma (DMX) 4 years later].
mesh_terms: D002471:Cell Transformation, Neoplastic; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008223:Lymphoma / Q000145:classification / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000473:pathology; D013997:Time Factors