BACKGROUND: Hirschsprung’s disease (HD) is rare in adults, since a majority of cases are corrected in childhood. OBJECTIVES: The authors describe the profile of patients with HD who reached adulthood without having undergone corrective surgery. Also, they describe the outcomes of a modified Duhamel procedure in these patients, in terms of morbidity and mortality. METHODS: This retrospective study, included patients 18 years old and above, diagnosed with HD who reached adulthood without having undergone definitive repair and managed surgically by the Division of Colorectal Surgery, UP-PGH from January 1, 2004 to December 31, 2014. A review from the Department Surgical Database was used and patients’ hospital records were used to fill out a Data Collection Form. Descriptive statistics were used to summarize the data. RESULTS: The 13 patients included in the study were diagnosed at an average age of 16.6 (± 13.16) years. The mean age at the time of definitive surgery was 23.46 (± 6.96) years. The M:F ratio was 5.5:1. The most common presenting symptom was constipation (69.23%). All had a prior proximal bowel diversion, with a transverse loop colostomy (61.54%) being the most common. The transition zone was located in the sigmoid in a third of patients. The mean time from diagnosis to definitive surgery was 6.69 years. Eight (61.54%) have since undergone stoma reversal. There was only one (7.69%) morbidity, a superficial surgical site infection. No mortalities were reported. CONCLUSION The modified Duhamel procedure is a safe definitive surgical procedure for the adult patient with HD.