The goal of this multicenter, prospective, observational study is to investigate factors associated with wound dehiscence following pilonidal sinus surgery. The main questions it aims to answer are:

Does the proximity of the pilonidal sinus to the anal verge influence the risk of postoperative wound dehiscence? How do the morphological stage of the disease and the surgical technique used affect wound healing outcomes? Patients undergoing pilonidal sinus surgery as part of routine clinical care will be enrolled prospectively across multiple centers. Clinical, anatomical, and surgical characteristics-including anal proximity, morphological stage, and type of surgical technique-will be recorded. Participants will be followed postoperatively, and wound outcomes will be assessed to identify factors associated with wound dehiscence.

Inclusion Criteria:

• Adult patients (≥18 years of age)
• Diagnosis of pilonidal sinus disease
• Patients undergoing pilonidal sinus surgery as part of routine clinical care
• Ability to provide informed consent

Exclusion Criteria:

• Patients undergoing emergency surgery
• Previous pilonidal sinus surgery at the same site
• Inability to complete postoperative follow-up

The study population consists of adult patients diagnosed with pilonidal sinus disease who undergo pilonidal sinus surgery as part of routine clinical care at participating centers. Eligible patients are enrolled prospectively and followed after surgery. Demographic, anatomical, and surgical characteristics are recorded for observational analysis of postoperative wound outcomes.

Individual participant data will not be made publicly available. De-identified data may be shared for scientific purposes upon reasonable request, in accordance with institutional policies and ethics committee approval.