Multicentric giant lymph node hyperplasia with ascites and double cancers, an autopsy case.

A 70-year-old man, diagnosed to have multicentric giant lymph node hyperplasia (MGLNH) of the plasma cell type by postmortem examination, had double cancers of the thyroid and kidney, as well as a large amount of ascites and persistent serositis. Serum immunoelectrophoresis showed monoclonal IgG (lambda). Using the paired immunofluorescent technique, monoclonal plasma cell proliferation was observed on the section of a lymph node.