INTRODUCTION: Pancreatic ductal adenocarcinoma (PDAC) is one of the most severe malignant tumors. The recurrence rate is high, even after radical surgery. A sarcoid reaction is a histological finding that occurs in the lymph nodes in response to malignant tumors, infections, or foreign substances. Its histopathology is similar to that of sarcoidosis. Here, we report a case of coexisting sarcoid reaction and sarcoidosis that required differentiation from PDAC recurrence.
Horie et al. (Thu,) studied this question.