Long-term outcome after Bascom's pit-pick procedure for pilonidal sinus disease: A cohort study

Previous studies have shown favourable short-term results after Bascom's pit-pick procedure for simple pilonidal sinus disease. A minimum 5-year follow-up is considered the gold standard but only a few long-term studies have previously been reported. Here, we aimed to estimate the long-term risk of treatment failure, incomplete wound healing or recurrence, postoperative complications and patient reported outcome measures such as chronic pain and satisfaction with cosmetic appearance.

Medical records of patients registered in a local database after undergoing Bascom's pit-pick procedure were reviewed and follow-up data updated. The patients received an online survey including questions about demographics, lifestyle, complications, reintervention, pain, satisfaction with cosmetic appearance and supplemented with telephone interviews if no response was received.

A total of 158 patients underwent Bascom's pit-pick procedure during the period August 2007 to March 2014. Median follow-up was 7.98 (0.66, 10.96) years. Twelve patients (8%) had reintervention due to incomplete wound healing. A total of 32 patients experienced a recurrence. In competing risk analyses, the 10-year cumulative recurrence rate was 27% (95% CI: 19%-35%) of patients with complete wound healing. Treatment success was 68%. Recurrence was associated with active smoking, HR of 5.30 (95% CI: 1.42-19.86; p = 0.01), and number of primary pits ≥3, HR of 5.11 (95% CI: 1.49-17.47; p = 0.01). More than 90% had no postoperative complications or chronic pain, and more than 70% reported a high satisfaction with the cosmetic appearance.

Bascom's pit-pick seems to be adequate treatment for most patients with a simple pilonidal sinus.