Re-evaluating robotic median arcuate ligament release: methodological and generalizability limitations

This letter critically appraises the study by Simioni A, et al. on median arcuate ligament release (MALR), which reports high rates of symptom resolution and low morbidity in a single-center cohort. While the results are encouraging, several limitations require further consideration. The study population was demographically narrow, with 94% females, with low body mass index (BMI) and selected from a single center using a highly specialized stepwise multidisciplinary algorithm, introducing selection bias that limits generalizability. The absence of a control group prevents the conclusion about the robotic approach being superior to laparoscopic, open, or non-operative strategies. Furthermore, differential loss of patients to follow-up may have contributed to inflated long-term success rates and attrition bias. We recommend that future work should consider broader, prospective, multicenter designs with standardized protocols for diagnosis/inclusion, diverse populations, comparator arms, and reasons for attrition to enhance generalizability, strengthen result validity, and the true clinical value of long-term outcomes of robotic MALR.