Necrotic lung nodules on chest Xray are seen in: (A) TB, (B) RA, (C) Sarcoidosis, (D) All of the above
Answer is D. Necrobiotic pulmonary nodules are sterile cavitating lung nodules associated with inflammatory bowel disease and rheumatoid ahritis Histologically, necrobiotic nodules consist of a core of fibrinoid necrosis and sterile aggregate of numerous epithelioid histiocytes arranged in indistinct nodules with an infiltrate of lymphocytes, plasma cells and multinucleated giant cells.(Ref: Chapman and Nakielny's Aids to Radiological Differential Diagnosis 6thEtd, page no.85)