Mesh, flap or combined repair of perineal hernia after abdominoperineal resection - A systematic review and meta-analysis.

"CONFLICT OF INTEREST The authors declare that they have no conflicts of interest."

"Funding information"

"The inclusion criterion was all original studies describing success rates of surgical perineal hernia repair after either laparoscopic or open APR. Exclusion criteria were articles written in any language other than English, non‐human population, age below 18 years, total population less than two, congenital perineal hernia and perineal hernia after sacrectomy or total pelvic exenteration. Papers published before the year 2000 were excluded to minimize the impact of technical developments over time. Also, patients who had had primary closure of a perineal hernia were excluded since this is no longer considered a valid surgical option []. The quality of studies was assessed using the Newcastle–Ottawa Scale (NOS). The protocol was prospectively registered in the Prospero database (registration number CRD42021274677). The systematic review was performed according to the AMSTAR2 checklist []."