To the Editor:
Primary pancreatic lymphoma (PPL) is extremely rare, account- ing for 1% of extra-nodal lymphomas and less than 0.5% of pan- creatic masses [1] . Both cytological and histological analyses are required to confirm the diagnosis of PPL. The main treatments include chemotherapy and radiotherapy [2] . Pancreatic resection alone does not improve the survival rate [3] . Hence, it is necessary to differentiate PPL from other malignant tumors before surgery. To date, there is no consensus on the optimal diagnostic approach and most experience is from case reports.