A double-colon dilemma: unusual presentation of complete tubular colonic duplication in a 7-month-old

Gastrointestinal duplications are rare congenital anomalies, with colonic duplication being an uncommon presentation. A duplication of the colon is exceedingly rare, which brings diagnostic as well as therapeutic challenges to attending surgeons. These anomalies often present with non-specific gastrointestinal symptoms that resemble other common conditions such as Hirschsprung disease. Here, we present a case of a 7-month-old infant with progressive abdominal distension and constipation misdiagnosed as Hirschsprung disease, which was discovered to be duplication of the colon.