Tubular duplication of colon with diverticulosis in an adult

Gastrointestinal duplications are rare congenital malformations characterized by the presence of an additional segment of intestine that runs parallel to the normal bowel. These duplications can be either cystic (80%) or tubular (20%). This report describes a 40-year-old female with a history of recurrent abdominal pain and chronic constipation. Physical examination revealed no tenderness. An abdominal computed tomography scan with rectal contrast identified an elongated, blind-ending tubular structure originating from the sigmoid colon, displaying a T-shaped bifurcation. Colonic duplications are uncommon in adults, with tubular sigmoid duplications being particularly rare. Unlike cystic duplications, tubular variants often exhibit T- or Y-shaped configurations. Potential complications include bleeding, intussusception, volvulus, perforation, or malignant transformation, though some patients may only experience recurrent pain and constipation without severe sequelae. Early detection is crucial to prevent complications that might necessitate surgical intervention.