- Any prior therapy for pancreatic cancer, any prior external beam radiation will be evaluated to determine radiation field overlaps and appropriateness of protocol radiation, any invasive cancer in the last 5 years (except for a diagnosis of low-risk prostate cancer, treated non-melanoma/melanoma skin cancer, appropriately treated ductal carcinoma in situ or early stage invasive carcinoma of breast and appropriately treated in-situ/early stage cervical/endometrial cancer)