Long-term results of botulinum toxin type A in complex abdominal wall repair and review of the literature.

Administration of botulinum toxin (BTX) is being used in cases of complex ventral hernia for the reconstruction of the linea alba and closure of the abdominal wall. However, there are no published results regarding the long-term effects of BTX and its implication in hernia recurrence. Our purpose is to evaluate the outcomes in hernia recurrence of the administration of BTX in complex ventral hernia repair. 36 patients underwent elective surgery for complex ventral hernia and were evaluated retrospectively. The study included patients with a transverse hernia defect ≥ 100 mm and loss of domain hernias, receiving BTX injections 6 weeks prior to elective surgery. Global results and long-term recurrence were analysed. There were no complications related to BTX administration. The mean transverse hernia defect was 139.44 ± 50.98 mm, the mean abdominal cavity volume (ACV) was 10.19 ± 3.33 dm3, the mean hernia sac volume (HSV) was 1.93 ± 1.79 dm3, presenting a mean volume ratio (VR) of 20.71 ± 19.76%. Primary closure was achieved in 28 patients (77.8%), 21 of whom (75%) needed an anterior component separation technique. Recurrence rate was 11.4% at 2-years follow-up. BTX administration is a safe and feasible method for abdominal wall expansion prior to complex incisional hernia repair, achieving high rates of primary closure. Long-term follow-up shows good results in terms of recurrence in these patients.