Pancreatic metastasis from non-small cell lung carcinoma diagnosed on EUS biopsy: report of a rare case and potential pitfall.

Lung non-small cell carcinoma is one of the most common cancers in the world. Pancreas metastasis from lung cancer is very rare. Endoscopic ultrasound-guided fine needle aspiration biopsy (EUS-FNAB) is a useful method to improve the diagnosis of pancreatic tumors and to guide the treatment plan. However, the limited amount of specimen obtained from EUS-FNAB may be a pitfall. Here we present a case of pancreatic metastasis from lung non-small cell carcinoma initially mimicking primary pancreatic adenocarcinoma.