40 year old nonsmoker male presents with cough and  exertional dyspnoea . What is the radiological pattern ?What is the differential diagnosis?

Canon ball lung nodules, mostly metastatic disease.

In real life this was a tough conclusion to reach at, Bronchoscopy revealed endobrochial lesion LLL,Biopsy report adeno ca -first pathologist,second opinion no malignancy,CT guided FNA -no malignancy,tru cut biospy - no malignancy, Finally VATS biospy of a full nodule -adeno ca confirmed.

Another unusual feature of this disease - despite such widespread lung disease never had spread beyond lungs for nearly 5 years.He was one of our spectacular responders to Gefitinib.