To evaluate the outcome of excision with or without primary closure in the management of chronic pilonidal sinus (PNS) disease. Methods: Between July 2002 and November 2006, a randomized trial was conducted in the Department of General Surgery, Riyadh Medical Complex, Riyadh, Kingdom of Saudi Arabia. All the patients who presented with chronic natal cleft PNS disease were included in the study. They underwent either excision with midline closure (EMC group), or excision without closure (EWC group). Patients, who came with an acute pilonidal abscess (complicated) were excluded from the study. The principle outcome measures recorded were wound infection, healing time, time off work and the recurrence rate. Results: A total of 380 patients of chronic PNS were divided into EMC group, (188 patients) and EWC group (192 patients). Majority of the patients were male in both the groups (93%). The hospital stay ranged from 2 to 5 days (mean=3.6±1.4 days) for EMC group, while it was 3-5 days (mean=4±1.1 days) for EWC group (p