To assess the impact of a simple flap closing procedure by Karydakis flap (KF) after pilonidal sinus excision on the costs and healing time as compared to routine lay-open technique.

Out of 44 consecutive patients operated on for pilonidal excision (November 2013–March 2015), 17 had a Karydakis flap and 27 a lay-open procedure. For each patient, the length of stay, the operating time (OT), the time needed for complete healing and postoperative care resources were recorded. The global costs included OT, nursing care quantity, and modalities until complete scar healing.

One reoperation in the lay-open group was necessary during the follow-up (8±5months). No recurrence occurred. Postoperative morbidity was similar in both groups. Results showed that KF global cost was inferior as compared to lay-open technique (941±178€ vs. 1601±399€; P=0.0001), KF healed faster (32±17 vs. 59±22days; P=0.0001), whereas OT was longer in KF group (16±7 vs. 25±4min; P=0.001).

KF allows a faster healing time and a 41% lower cost than lay-open technique. Preferential use of KF rather than lay-open procedure could allow a significant health cost saving.