An evidence-based approach to the diagnosis and management of parastomal hernias reveals the lack of evidence on several topics, which need to be addressed by multicenter trials. Parastomal hernia prevention using a prophylactic mesh for end colostomies reduces parastomal herniation. Clinical outcomes should be audited and adverse events must be reported.

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Current data suggests a relatively low incidence of TSH but that all trocar incisions of a minimum of 10 mm should be closed. In pre-school children undergoing laparoscopic surgery, all port sites should be closed.

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Reoperation rate for recurrence 41 months after primary umbilical/epigastric or incisional hernia repair underestimated overall risk of recurrence by four- to fivefolds. This study was registered in www.clinicaltrials.gov (NCT01325246).

Emergency umbilical/epigastric or incisional hernia repair was beset with up to 15-fold higher mortality, reoperation, and readmission rates than elective repair. Older age, female gender, and umbilical hernia defects between 2 and 7 cm or incisional hernia defects up to 7 cm were important risk factors for emergency repair.

In the present nationwide study, repair for a parastomal hernia was associated with high rates of morbidity, mortality, and repair for recurrence. Emergency repair was the only important risk factor to predict poor 30-day postoperative outcome.

In total, 4,786 small (≤ 2 cm) elective open umbilical and epigastric hernia repairs were included. Age was median 48 years (range 18-95 years). Follow-up was 21 months (range 0-47 months). The cumulated reoperation rates for recurrence were 2.2 % for mesh reinforcement and 5.6 % for sutured repair (P = 0.001). The overall cumulated reoperation rate for sutured and mesh repairs was 4.8 %. In conclusion, reoperation rate for recurrence for small umbilical and epigastric hernias was significantly lower after mesh repair compared with sutured repair. Mesh reinforcement should be routine in even small umbilical or epigastric hernias to lower the risk of reoperation for recurrence avoid recurrence.