<?xml version='1.0' encoding='UTF-8'?><xml><records><record><source-app name="HighWire" version="7.x">Drupal-HighWire</source-app><ref-type name="Journal Article">17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">CAO, CAN</style></author><author><style face="normal" font="default" size="100%">KONG, MAX X.</style></author><author><style face="normal" font="default" size="100%">KAPALI, MALATHY</style></author><author><style face="normal" font="default" size="100%">MOEZARDALAN, KOOROSH</style></author><author><style face="normal" font="default" size="100%">SHI, QIUYING</style></author><author><style face="normal" font="default" size="100%">AZARM, ALI</style></author><author><style face="normal" font="default" size="100%">LAI, JINPING</style></author></authors><secondary-authors></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">EGFR Mutated Lung Adenocarcinoma Metastasis to the Pancreas Mimicking Primary Pancreatic Ductal Carcinoma</style></title><secondary-title><style face="normal" font="default" size="100%">Anticancer Research</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2020-08-01 00:00:00</style></date></pub-dates></dates><pages><style  face="normal" font="default" size="100%">4401-4404</style></pages><doi><style  face="normal" font="default" size="100%">10.21873/anticanres.14444</style></doi><volume><style face="normal" font="default" size="100%">40</style></volume><issue><style face="normal" font="default" size="100%">8</style></issue><abstract><style  face="normal" font="default" size="100%">Background: The occurrence of lung adenocarcinoma metastasizing to the pancreas is overall rare and can histologically imitate primary pancreatic ductal carcinoma (PDAC). Case Report: This is a case report of a 70-year-old female with a history of surgically resected right lung adenocarcinoma presenting for routine follow up without symptoms. CT scans revealed a pancreatic cystic mass with ductal dilatation that was sampled via endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) and thought to be a primary pancreatic mucinous neoplasm with high grade dysplasia suspicious for carcinoma based on smear cytology. On repeat EUS-FNA and biopsy (FNB) with additional immunohistochemical testing for lung adenocarcinoma markers thyroid transcription factor (TTF1) and Napsin A and molecular testing, the lesion was identified as a metastasis of lung adenocarcinoma with an epidermal growth factor receptor (EGFR L858R) mutation; subsequently, the patient underwent targeted therapy that yielded an almost complete response. Conclusion: To the best of our knowledge, this is the first documented case in English literature of a lung adenocarcinoma metastasis to the pancreas mimicking a pancreatic primary neoplasm and highlights the potential pitfalls of EUS-FNA for the diagnosis of certain metastases to the pancreas.</style></abstract></record></records></xml>