Incisional hernias are a common complication of midline laparotomies. The aim of this study was to determine the impact of prophylactic mesh placement after midline laparotomy for ovarian tumors on the incidence of incisional hernia.
We collected retrospective data from patients undergoing midline laparotomy for borderline or ovarian cancer with at least 12 months of follow-up, including those with and without mesh. Patient demographics, preoperative characteristics and risk factors for hernia were reported and grouped according to prophylactic mesh placement. A multivariate analysis was conducted to identify independent risk factors for incisional hernia. Kaplan-Meier curves illustrating the cumulative incidence of incisional hernia based on mesh placement were performed.
A total of 139 consecutive patients with available data were included, 58 in the non-mesh group and 81 in the mesh group, with high body mass index (BMI) as the most common reason for mesh placement. The mean (SD)) age was 60 years (13.97). A total of 11 patients (7.9%) had borderline tumors while 128 (92.1%) had invasive cancer. After clinical and radiological examination, 18.7% (26/139) of patients developed incisional hernia at a median follow-up of 35.8 months (IQR) 43.8): 31% (18/58) were detected in the non-mesh group, and 9.9% (8/81) in the mesh group (p<0.002). Multivariate analysis showed no-mesh placement (OR) 10; 95% CI) 2.8 to 35.919; p<0.001) as a significant risk factor for incisional hernia. Age ≥70 (OR 4.3; 95% CI 1.24 to 15; p=0.02) and BMI ≥29 (OR 4.4; 95% CI 1.27 to 14.93; p=0.019) were also identified as independent risk factors for hernia development. According to Kaplan-Meier curves, the cumulative incidence of incisional hernia was higher in the non-mesh group (p=0.002).
The incidence of incisional hernia was high in patients undergoing midline laparotomy for ovarian tumors. The addition of a prophylactic mesh may reduce this incidence, therefore there is a need to consider it as an option for high-risk patients, particularly those aged over 70 years or with a BMI ≥29 kg/m.

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