Inclusion criteria for patients
To obtain a homogenous but still representative patient population for analysis and high-external validity, all patients with primary loop ileostomy closure and without further interventions or conditions to the abdominal wall, which might interfere with the primary outcome measure and reduce the reproducibility and interpretability of the data, are eligible for inclusion and will be informed about the P.E.L.I.O.N. trial:Planned elective loop ileostomy closureAdult patients (≥ 18 years of age)Life expectancy > 2 yearsWritten informed consentAbility to understand the character and individual consequences of the clinical trial