Does gentamycin affect long term recurrence rate in pilonidal sinus surgery?
BACKGROUND: The influence of topical intraoperative gentamycin on long term recurrence rate in primary pilonidal sinus surgery has not yet been investigated. METHODS: One hundred and eight-seven patients following excision of primary pilonidal sinus disease (PSD) and primary symmetrical midline closure were analysed regarding the use (group 1) or non-use (group 2) of topical application of an intraoperative gentamycin sponge after a median follow-up of 16 years by a specific questionnaire. RESULTS: The actuarial 15-year-recurrence rate in group 1 was 31% (34/111) compared to 26% (20/76) in group 2, which was statistically not different (p = 0.99). Recurrences occurred with a median 2.7 (range 0.1–20.1) years after primary surgery, so time to recurrence did not differ between both groups (4.3 ± 0.8 years group 1 vs. 6.8 ± 1.5 years group 2; p = 0.99). CONCLUSIONS: The suggested positive effects of topical gentamycin application on long term recurrence rate could not be confirmed. Astonishingly though, surgical infection does not seem to alter long term recurrence rate.