Mallory-Weiss syndrome is a clinical entity defined by non-transmural, longitudinal mucosal and submucosal lacerations occurring at the esophagogastric junction or the proximal gastric cardia1,2. Originally described by George Mallory and Soma Weiss in 1929 in chronic alcohol-dependent patients experiencing severe emesis, the syndrome is recognized as a major cause of non-variceal upper gastrointestinal bleeding1,2. The mechanical stress responsible for the lesion involves a sudden elevation of transabdominal and intragastric pressure that tears the vulnerable mucosa during uncoordinated relaxation of the lower esophageal sphincter1,7. Although many episodes cease spontaneously due to the rich submucosal vascular plexus's ability to form clots or the inherent elasticity of the gastric cardia, severe arterial or venous bleeding can occur, mandating prompt diagnostic evaluation via upper endoscopy and targeted endoscopic intervention1,2.

Etiology & Risk Factors

  • Forceful Emesis & Retching: The most common precipitating factor, secondary to gastroenteritis, hyperemesis gravidarum, acute alcohol intoxication, chemotherapy-induced nausea, or bulimia nervosa1.
  • Increased Intra-Abdominal Pressure: Severe coughing fits, prolonged sneezing, vigorous hiccups, blunt abdominal trauma, and heavy weightlifting1.
  • Procedural and Iatrogenic Triggers: Chest compressions during cardiopulmonary resuscitation (CPR), difficult diagnostic or therapeutic upper endoscopies, and transesophageal echocardiography6.
  • Predisposing Anatomical & Physiological Factors: Sliding hiatal hernias, which alter the normal supportive anatomy of the gastroesophageal junction, chronic gastritis, and underlying esophagitis1,7.
  • Systemic and Pharmacological Risk Factors: Coagulopathies, thrombocytopenia, and the use of antiplatelet agents or non-steroidal anti-inflammatory drugs (NSAIDs) that exacerbate mucosal hemorrhage once the structural tear occurs1.

Pathophysiology

The pathophysiological foundation of Mallory-Weiss syndrome relies on biomechanical shear forces acting upon the transition zone between the squamous epithelium of the distal esophagus and the columnar epithelium of the proximal stomach1,7. During sudden, forceful vomiting or retching, the abdominal wall and diaphragm contract violently against a closed or poorly relaxing lower esophageal sphincter (LES)1. This action generates a massive, instantaneous pressure gradient across the esophagogastric junction. As gastric contents are forcefully propelled upward, the proximal stomach tends to prolapse or invaginate into the distal esophagus, stretching and twisting the mucosa1,2. The combination of high intraluminal pressure, gastric prolapse, and shearing forces creates excessive mechanical tension along the longitudinal axis of the mucosal folds (rugae), which are structurally less mobile than the intervening furrows1,7. Consequently, a linear, longitudinal mucosal and submucosal tear develops, typically measuring several millimeters to a few centimeters in length and a few millimeters in width1. The laceration almost invariably crosses the squamocolumnar junction (Z-line), extending more frequently onto the gastric side of the cardia rather than the esophageal wall, due to the anatomic fixation and differences in tissue compliance1,2. Submucosal arterioles or venules exposed by the tear bleed into the lumen, producing hematemesis1.

Mallory-Weiss syndrome — Pathophysiological Cascade & Clinical Flowchart 1 Trigger / Primary Insult Sudden, forceful rise in intra-abdominal pressure induced by severe retching, emesis, coughing, or cardiopulmonary resuscitation. 2 Cellular / Pathophysiological Cascade Abrupt transmural pressure gradient across the esophagogastric junction coupled with gastric prolapse and differential shear forces. 3 Target Organ / Structural Change Creation of a linear, longitudinal mucosal and submucosal laceration spanning the squamocolumnar junction (Z-line), predominantly on the gastric cardia. 4 Hallmark Clinical & Diagnostic Manifestation Upper gastrointestinal hemorrhage manifesting as hematemesis or melena following an episode of non-bloody vomiting. 5 Complications if Untreated & Therapeutic Target Exsanguinating hemorrhage, hypovolemic shock, or transmural perforation; treated via acid suppression, volume resuscitation, and endoscopic hemostasis.

Clinical Presentation & Classic Clinical Signs

  • History & Cardinal Symptoms: Patients typically present with a characteristic history of forceful retching, vomiting, or coughing, followed immediately by episodes of bright red or dark red hematemesis (or "coffee-ground" emesis if gastric acid has acted upon the blood)1,2. Melena may occur if the bleeding is slower or if the blood passes through the entire gastrointestinal tract, while hematochezia is exceptionally rare and implies massive, rapid hemorrhage with hyperperistalsis1. Abdominal or epigastric discomfort is common, reflecting the antecedent retching or underlying gastritis, though severe, sharp, unrelenting chest or abdominal pain points toward alternative diagnoses such as esophageal rupture (Boerhaave syndrome)1.
  • Physical Examination & Named Clinical Signs: Vital signs dictate initial urgency; stable patients display normal hemodynamics, whereas those with significant hemorrhage manifest orthostatic hypotension, resting tachycardia, tachypnea, diaphoresis, pallor, and delayed capillary refill. Abdominal examination is typically unremarkable or reveals mild, non-specific epigastric tenderness without peritoneal signs. Physical signs of chronic liver disease (e.g., palmar erythema, spider angiomata, jaundice, splenomegaly, or ascites) should be actively sought, as coagulopathy or portal hypertension can complicate or coexist with upper gastrointestinal bleeding1.

Diagnostic Workup & Interpretation (Laboratory, Imaging & ECG/Pathology)

Diagnostic Modality / Test Expected Clinical & Radiological / Laboratory Finding
Gold-Standard InvestigationUrgent esophagogastroduodenoscopy (EGD) demonstrating one or more linear, longitudinal mucosal lacerations spanning the squamocolumnar junction, predominantly situated on the lesser curvature of the gastric cardia, with active oozing, a visible vessel, or a clean-based clot.
Laboratory PanelComplete blood count (CBC) demonstrating normocytic anemia (if chronic or subacute) or normal hemoglobin/hematocrit acutely before hemodilution; elevated blood urea nitrogen (BUN) to creatinine ratio greater than 30:1 due to upper gastrointestinal blood urea resorption; baseline coagulopathy panel (PT/INR, aPTT) and platelet count to assess hemostatic reserve.
Imaging / Radiology (X-ray, US, CT, MRI)Chest and plain abdominal radiographs are generally non-diagnostic for Mallory-Weiss syndrome but are mandatory to rule out pneumomediastinum, free subdiaphragmatic air, or pleural effusion if Boerhaave syndrome or visceral perforation is suspected. CT angiography is reserved for massive, refractory bleeding when endoscopy is temporarily unfeasible.
ECG / Histopathology / Procedural12-lead ECG is performed routinely in acute hemorrhage to assess for myocardial ischemia secondary to stress-induced oxygen supply-demand mismatch in vulnerable patients. Histopathology (if biopsies are taken) shows acute superficial mucosal inflammation, disruption of the lamina propria, and submucosal vascular exposure without chronic malignant transformation.

Staging, Classification & Clinical Scoring Systems

Criterion / Stage / Score Component Clinical Threshold, Points & Management Implication
Glasgow-Blatchford Score (GBS)Assesses pre-endoscopic risk using blood urea nitrogen, hemoglobin, systolic blood pressure, pulse, and clinical presentation (syncope, melena, hepatic disease, cardiac failure). A score of 0 indicates a very low risk of needing clinical intervention and safely permits outpatient management or early discharge.
Rockall Risk ScoreCombines clinical parameters (age, shock, co-morbidities) with endoscopic findings (diagnosis, stigmata of recent hemorrhage). Helps stratify post-endoscopy rebleeding risk and overall mortality, guiding the duration of inpatient monitoring.
Endoscopic Appearance ClassificationCategorizes mucosal lesions based on depth, length (typically 0.5 cm to 4 cm), circumferential involvement, and presence of active bleeding (spurting, oozing, non-bleeding visible vessel, or clean base), guiding the selection of endoscopic hemostatic modalities.

Differential Diagnosis

Differential Condition Distinguishing Clinical, Biochemical & Imaging Features
Boerhaave Syndrome (Esophageal Rupture)Characterized by severe, sudden transmural rupture of the esophagus following retching (Mackler's triad: vomiting, chest pain, and subcutaneous emphysema); EGD shows transmural disruption and free air/contrast extravasation on fluoroscopy or CT, requiring emergent surgical consultation.
Esophageal Variceal HemorrhagePresents with massive, painless hematemesis in patients with portal hypertension and chronic liver disease; EGD reveals tortuous, dilated submucosal veins rather than linear mucosal tears, often managed with vasoactive drugs and band ligation.
Peptic Ulcer Disease (Gastric / Duodenal)Presents with epigastric pain often related to meals; EGD demonstrates a localized mucosal excavation with a fibrinous exudate, frequently associated with Helicobacter pylori infection or NSAID usage, rather than linear junctional tears.
Erosive Gastritis / EsophagitisPresents with burning dyspepsia and mild bleeding; EGD reveals widespread, diffuse mucosal erythema, friability, and multiple shallow erosions rather than discrete longitudinal lacerations at the gastroesophageal junction.

Management & Treatment Protocol

  • Initial Stabilization & Resuscitation: Assess airway, breathing, and circulation (ABCs). Secure large-bore peripheral intravenous access (16- or 18-gauge) for aggressive crystalloid resuscitation. Administer packed red blood cells (PRBCs) to maintain a hemoglobin target of greater than 7 g/dL (or greater than 9 g/dL in patients with active coronary artery disease). Correct underlying coagulopathy with fresh frozen plasma (FFP) or platelet transfusions as indicated1.
  • First-Line Medical / Pharmacological Therapy (with exact adult dosing): Initiate high-dose intravenous proton pump inhibitor (PPI) therapy to stabilize clot formation by raising gastric pH above 6.0. Standard adult dosing: Pantoprazole 80 mg IV bolus followed by a continuous infusion of 8 mg/h for 72 hours, or intermittent dosing of 40 mg to 80 mg IV every 12 hours. Antiemetics (e.g., ondansetron 4 mg to 8 mg IV every 8 hours PRN or metoclopramide 10 mg IV every 6 hours PRN) must be administered promptly to halt further retching and prevent tear extension.
  • Endoscopic / Interventional Management: Perform urgent EGD within 24 hours (or sooner if hemodynamically unstable). For actively bleeding tears or those with high-risk stigmata (visible vessels or active oozing), apply endoscopic therapy: combination therapy utilizing dilute epinephrine injection (1:10,000) for tamponade followed by mechanical clipping (hemoclips) or thermal coagulation (heater probe, bipolar cautery). If endoscopic hemostasis fails, transcatheter arterial embolization (TAE) via interventional radiology or surgical oversewing of the tear is indicated1,2.

Complications & Prognosis

  • Acute Hemorrhagic Shock & Anemia: Severe blood loss leading to hypovolemic shock, multi-organ dysfunction, and profound iron-deficiency anemia requiring blood transfusions1.
  • Esophageal or Gastric Perforation: Rare catastrophic complication usually resulting from aggressive endoscopic therapy or misdiagnosed transmural lesions (Boerhaave syndrome), leading to mediastinitis, sepsis, and high mortality.
  • Rebleeding: Occurs in approximately 5% to 10% of cases, typically within the first 48 hours following initial presentation, necessitating repeat endoscopic intervention.
  • Prognosis: The vast majority of Mallory-Weiss tears (>80% to 90%) cease bleeding spontaneously with conservative care and acid suppression. The overall mortality rate is low (<1% to 3%) and is generally driven by comorbid systemic illnesses, advanced age, or underlying coagulopathies rather than the tear itself1.