<prompt> Necrotic lung nodules on chest Xray are seen inTBRASarcoidosisAll of the above  <response>: 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 Nakielnys Aids to Radiological Differential Diagnosis 6thEtd, page no.85 