Pulmonary necrobiotic nodule.
D001172:Arthritis, Rheumatoid / Q000473:pathology*; D003937:Diagnosis, Differential; D014890:Granulomatosis with Polyangiitis / Q000473:pathology; D006801:Humans; D008171:Lung Diseases / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012218:Rheumatoid Nodule / Q000473:pathology*