Liver tumours may be benign or malignant and malignant liver tumours may be primary (arising from liver) or secondary (metastatic).
Rarely gallstones form within the bile ducts – primary bile duct stones. However, most stones found in the bile ducts have migrated from gallbladder.
Pancreatic ductal adenocarcinoma (PDAC) is a lethal form of cancer and its the fourth ranked cause of death by cancer in Western countries.
Duodenal tumours may arise from the duodenal mucosal epithelium, endocrine cells of the duodenum, pacemaker cells called interstitial cells of Cajal or the duodenal muscle cells.
These are relatively rare tumours that arise from the Interstitial cells of Cajal, the pacemaker cells located within the muscular layers of the gastrointestinal tract.
They occur more commonly in stomach, but can occur in the duodenum, small intestine, colon and rectum. They arise from pacemaker cells of Cajal in the intestinal wall.