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Highlights Tubulo-villous adenoma is a rare benign appendiceal neoplasm. This neoplasm is often asymptomatic and occasionally discovered at surgery. Acute appendicitis is the most common clinical presentation. Pre-operative diagnosis, even with the help of radiological imaging, is difficult. Appendectomy is considered the correct treatment.

Highlights Meckel’s diverticulum (MD) is the most common congenital malformation of the gastrointestinal tract. Annular MD is an extremely rare cause of intestinal obstruction and ischemia in adults. Preoperative diagnosis of MD is a challenge because of its rarity and the absence of specific radiological findings and symptoms. Surgery represents the appropriate treatment of complicated MD.