Meckel's diverticulum: Unusual cause of significant bleeding in an adult male.

Meckel's diverticulum is a common congenital gastrointestinal malformation affecting 2% of the general population. Most affected patients are asymptomatic, and excessive bleeding causing a significant drop in hemoglobin count is an uncommon complication of Meckel's diverticulum, especially in adult patients. Herein, we present an adult case of Meckel's diverticulum that nearly led to hemodynamic instability. Laparotomy and segmental small bowel resection were critical in treating the patient.