Fig. 4From: Long-term survival with repeat resection for lung oligometastasis from pancreatic ductal adenocarcinoma: a case reportHistopathology. a Microscopic view of the primary tumor. b Microscopic view of the first pulmonary metastatic tumor. c Microscopic view of the second pulmonary metastatic tumor. d Microscopic view of the third pulmonary metastatic tumor. Histologically, all of the metastatic tumors are composed of columnar cancer cells with papillotubular proliferation. These findings are similar to those of the primary tumorBack to article page