This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Superficial mallory weiss tear heals completely within: 
Select and explain. 
A. 1 week, B. 48 hours, C. 24 hours, D. 72 hours
B: 48 hours
Answer: B: 48 hours 
Explanation: Mallory-Weiss tears Mucosal or submucosal lacerations that occur at the gastroesophageal junction. Patients present with hematemesis or coffee-ground emesis. All will have a history of recent non-bloody vomiting followed by hematemesis. The tear is due to increased intra-abdominal pressure, in combination with a shearing effect caused by negative intrathoracic pressure. The bleeding is self-limited and mild. Superficial Mallory-Weiss tears can heal completely within 48 hours. Ref: Sleisenger and Fordtran's, E-9, P-299.