Metastatic Adenoid Cystic Carcinoma to the Pancreas: A Case Report and Review of the Literature.

Although more than 90% of pancreatic tumors represent primary tumors, specifically ductal adenocarcinomas, metastatic tumors are not infrequent at this site. Metastasis of salivary gland tumors to the pancreas is exceedingly rare, with only a few cases reported in the English-language medical literature. Here, we report a patient with metastatic adenoid cystic carcinoma to the pancreas, 24 months following the initial diagnosis, and review the available literature on secondary tumors located in the pancreas with an emphasis on tumors of salivary gland origin.