FOLH1 and undifferentiated carcinoma: The other 6 PSMA-positive lesions included a distal cholangiocarcinoma, an adenocarcinoma of pancreaticobiliary origin, suspected PDAC (i.e., not resected due to metastases), a duodenal adenocarcinoma, an undifferentiated carcinoma, and a non-invasive IPMN.