Primary cardiac non-Hodgkin's lymphoma.
D001932:Brain Neoplasms / Q000175:diagnosis; D003937:Diagnosis, Differential; D006338:Heart Neoplasms / Q000473:pathology*; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000473:pathology*; D008297:Male; D008875:Middle Aged