CEACAM5 and neoplasm: There are tumor lesions that are accessed via surgical procedures, for example, intratumoral infusion of the carcinoembryonic antigen-expressing measles virus through a stereotactically placed catheter within the tumor (NCT00390299) and endoscopic ultrasound-guided fine-needle injection has been adopted to deliver allogeneic mixed lymphocyte culture into tumors of patients with advanced pancreatic carcinoma [126].