<prompt> Most common cause of upper gastrointestinal tract bleeding is:Esophageal varicesPeptic ulcerGastritisMallory-Weiss tear  <response>: Peptic ulcer is the most common cause of upper GI bleeding, present in one-half to two-third of patient with upper GI bleeding. Only 10-15 ofHeavy drinkers develop alcoholic cirrhosis leading to esophageal varices Mallory - Weiss Syndrome Characterized by longitudinal paial tear only mucosa sub mucosa involved Most common site is cardia just below GE junction. More common in Alcoholic males 