This document discusses several inflammatory conditions that can affect different body systems. It provides details on the causes, symptoms, diagnostic tests and treatments for appendicitis, peritonitis, pancreatitis, cholecystitis, and cystitis. Appendicitis is caused by obstruction of the appendix, usually by a fecalith, and requires appendectomy to prevent rupture. Peritonitis is inflammation of the abdominal lining that can result from a perforated appendix or other infections. Pancreatitis may be due to gallstones or alcohol and causes abdominal pain. Cholecystitis is gallbladder inflammation often from gallstones blocking the cystic duct. Cystitis is a urinary tract infection.