Meckel's diverticulum attached to the umbilicus during appendectomy for a 14-year-old male!
Diverticulum simply means an abnormal pouch or sac formed due to a congenitally weak point along the intestine.
Meckel's diverticulum is the most common congenital abnormality of the small intestine; it is caused by an incomplete obliteration of the vitelline duct (ie, omphalomesenteric duct). The duct undergoes progressive narrowing and should disappear by 7 weeks' gestation. When the duct fails to fully obliterate, different types of vitelline duct anomalies appear, such as this diverticulum.
Definitive treatment of a complication, such as a bleeding Meckel diverticulum, is the excision of the diverticulum along with the adjacent ileal segment. This can be accomplished through laparoscopy or open surgery.