Following conditions may progress to cancer over a long period of time.

• Gastroesophageal reflux disease
• Achalasia cardia
• Gastric ulcers
• Helicobacter Pylori infection
• Gastric polyps
• Gallbladder stones
• Chronic pancreatitis
• Cirrhosis liver
• Hepatitis C virus infection
• Crohn’s disease
• Ulcerative colitis
• Colon and rectal polyps