Long-term outcomes after cleft lift surgery for pilonidal sinus disease in post-pubertal adolescents: data from a prospective Danish cohort.

Aim: Pilonidal sinus disease (PSD) is a common condition. Despite a relatively large proportion of patients presenting as post-pubertal adolescents, only small cohorts focusing on this PSD subcategory have been published, and surgical treatment remains challenging.

Method: The study is based on a prospective database established at Randers Regional Hospital in 2016. All patients undergoing Bascom's cleft lift (BCL) surgery from June 2016 until June 2020 were included in this study, focusing on patients ≤18 years of age comparing them to adult patients. Indications for BCL surgery were primary extensive manifestation, non-healing disease after previous elective surgery or disease recurrence.

Results: In total, n = 380 PSD patients were operated, of which n = 79 were post-pubertal adolescents with a median age at time of surgery of 17.2 years (interquartile range 16.3, 18.0). Sixty-six (84%) were boys. Twenty-seven (34%) presented with primary extensive manifestation, 34 (43%) due to non-healing wounds and 18 (23%) due to recurrence. Fifty-four patients (69%) healed uneventfully. There was no difference between the indications of surgery groups in terms of overall healing or time to healing if prolonged (P = 0.6). The median follow-up was 62 months (interquartile range 48, 73), with a 5-year recurrence rate of 19%, compared to 17% (P = 0.6) in the adult population.

Conclusion: Our study is the first to investigate long-term clinical outcomes of BCL surgery for PSD in post-pubertal adolescent patients. Recurrences seem to occur more frequently compared to adults. However, we demonstrate that post-pubertal adolescent patients with advanced PSD can be treated with BCL surgery with acceptable outcomes.