A 45 yr old woman has increasing abdominal girth for the past 2 years. On physical examination, She has abdominal distension. CT scan shows multiple nodules on peritoneal surfaces along with low attenuation mucinous ascites. Cytological examination was done after doing paracentesis. It showed well differentiated columnar cells with minimal nuclear atypia. From which sit did this pathology start?
Pancreas Ileum Jejunum Appendix