Merck Manual

Please confirm that you are a health care professional

honeypot link

Mallory-Weiss Syndrome


Kristle Lee Lynch

, MD, Perelman School of Medicine at The University of Pennsylvania

Last full review/revision Sep 2020| Content last modified Sep 2020
Click here for Patient Education
Topic Resources

Mallory-Weiss syndrome is a nonpenetrating mucosal laceration of the distal esophagus and proximal stomach caused by vomiting, retching, or hiccuping.

Initially described in patients with alcohol use disorder, Mallory-Weiss syndrome can occur in any patient who vomits forcefully. It is the cause of about 5% of episodes of upper gastrointestinal (GI) hemorrhage. The tear may also be accompanied by pain in the lower chest.

Diagnosis of Mallory-Weiss syndrome is suggested clinically by a typical history of hematemesis occurring after one or more episodes of non-bloody vomiting. In such cases, if the amount of bleeding is minimal and the patient is stable, testing may be deferred. Otherwise, if history is unclear or bleeding is ongoing, the patient should have standard evaluation for GI bleeding, typically with upper endoscopy and laboratory testing. Upper endoscopy can also be therapeutic because a clip can be placed over the tear to control bleeding.

Most episodes of bleeding stop spontaneously; severe bleeding occurs in about 10% of patients, who require significant intervention, such as transfusion or endoscopic hemostasis (by clip placement, injection of ethanol or epinephrine, or by electrocautery). Intra-arterial infusion of vasopressin or therapeutic embolization into the left gastric artery during angiography may also be used to control bleeding. Surgical repair is rarely required.

Click here for Patient Education
NOTE: This is the Professional Version. CONSUMERS: Click here for the Consumer Version
Professionals also read

Test your knowledge

Small Intestinal Bacterial Overgrowth (SIBO)
Small intestinal bacterial overgrowth can lead to vitamin deficiencies, fat malabsorption, and undernutrition. This syndrome can be caused by anatomic alterations or intestinal motility disorders. Which of the following may cause bacterial overgrowth in older people? 
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID

Also of Interest