Is there an indication for drainage in contact with a prosthesis placed in a retromuscular position, during a cure for abdominal wall ventration in adults? This procedure is very frequent in digestive surgery and can be associated with serious complications, notably prosthesis infection.

Inclusion criteria:

• Adult patient (≥18 years old)
• Patient operated on at HUS between 01/01/2018 and 12/31/2020
• Patient who has undergone surgical cure of anterior or lateral abdominal wall eventration of any width with placement during the procedure of a prosthetic mesh in a prefascial retromuscular position.
• Patient not objecting to the reuse of their data for scientific research purposes.

Exclusion criteria:

• Patient who has expressed opposition to the reuse of his or her data for scientific research purposes.
• Particular clinical forms of the disease: absence of previous surgical intervention (and thus absence of ventration: umbilical hernia, diastasis)
• Absence of prosthesis during the operation or prosthesis placed in intraperitoneal position

Adult patient (≥18 years old) operated on at HUS between 01/01/2018 and 12/31/2020