Crohn’s Disease Complicated by an Ileo-urachal Fistula

To the Editors, Fistula formation is a common complication of Crohn’s disease (CD). Approximately 41% of patients will develop a fistula within 30 years of CD diagnosis.1 A fistula may form between adjacent intestine loops or between the intestine and any adjacent structures, such as the retroperitoneum, vagina, urinary bladder, anus, or skin. The urachus is a remnant embryonic structure between the bladder and the umbilicus. The urachal lumen...