RET and gastric adenocarcinoma: Further studies using comprehensive sequencing methods have also revealed the presence of RET rearrangements in KRAS wild-type pancreatic ductal adenocarcinoma, stomach adenocarcinoma, esophageal cancer, cholangiocarcinoma, bladder carcinoma, head and neck cancer, mesothelioma, low-grade glioma, atypical lung carcinoid tumor, and chronic myeloproliferative neoplasms [48,59,81,82,83,84].