Onlay Synthetic Bioabsorbable Mesh Herniorrhaphy Versus Herniorrhaphy Only in the Primary Treatment of Large Hiatal Hernia

Inclusion Criteria: * Patient undergoing laparoscopic primary repair for symptomatic LHH. LHH is defined as a hiatal hernia larger than 5 cm in axial length as diagnosed at barium series and/or CT-scan with contrast swallow and/or CT-scan with contrast injection with axial reconstruction. * Symptomatic hiatal hernia: heartburn and/or regurgitation and/or epigastric pain and/or dysphagia and/or anemia (if exclusion of other origin); * Patient aged ≥ 18 years; * Patient affiliated to a social security system or beneficiary of the same; * Free written informed consent signed by the participant and the investigator (no later than the inclusion day and before performing any examination required for the study). Exclusion Criteria: * Patient undergoing reoperation for recurrent LHH repair; * Emergency presentation needing an operation in a delay \<6 hours; * Asymptomatic hiatal hernia; * American anesthesiologist score \>3; * Recurrent hiatal hernia and previous surgical interventions involving gastroesophageal junction; * Brachyesophagus defined as the impossibility to achieve an intraabdominal length of the esophagus of at least 3cm after reduction of hernia contents and complete dissection and resection of the hernia sac; * Previous major upper gastrointestinal surgery; * Inability to perform primary closure of the crura; * Pregnant or breast-feeding woman; * Persons deprived of liberty or under guardianship or incapable of giving consent; * Any psychological, familial, sociological or geographical condition potentially hampering compliance with the study protocol or follow-up schedule, as assessed by investigator.