C26 - Malignant neoplasm of other and ill-defined digestive organs
Excludes 1:
-malignant neoplasm of peritoneum and retroperitoneum (C48.-)
C26.0 - Malignant neoplasm of intestinal tract, part unspecified
C26.1 - Malignant neoplasm of spleen
C26.9 - Malignant neoplasm of ill-defined sites within the digestive system