Development of a New Immunochemistry Method Using Antibodies of Proteins Related Pancreatic Cancer

"Two staining will be performed in cytology specimens obtained from same patient. The cytology specimen will be obtained using endoscopic ultrasound-guided fine needle aspiration. Three types of slides (direct smear, thinprep, surepath) are prepared for staining.~1. conventional cytology staining method~2. new cytology staining method using antibody of methionyl-tRNA synthetase 1"