Numerous studies have examined the relationship between carpal tunnel syndrome and the thickness of the flexor retinacular ligament. This varies along the course of the median nerve (the distal portion being the thickest) and increases with age. These studies have shown that the thickness of the ligament is greater in patients with carpal tunnel syndrome, without, however, demonstrating that it is related to the onset of this syndrome. According to Bartolomé-Villar, it may rather influence the onset of carpal pain.

The objective of this study is to determine whether a relationship exists between the thickness of the flexor retinacular ligament and the development of heel syndrome in the postoperative period for carpal tunnel syndrome.

This is a prospective, longitudinal, single-center, open-label observational study conducted on a population of patients operated on for carpal tunnel syndrome.

This study does not alter patient care or the doctor-patient relationship. Evaluations take place during routinely scheduled consultations. The frequency of evaluations is consistent with standard postoperative follow-up.

Inclusion Criteria :

• Male or female patient over 18 years of age
• Patient who has been informed of the research and has not indicated their opposition to the use of their medical data
• Patient who is a candidate for first-time carpal tunnel surgery

Exclusion Criteria :

• Emergency surgery performed in a post-traumatic context
• Mental impairment or any other reason that may hinder understanding or strict application of the protocol
• Patient not affiliated with the French social security system
• Patient under legal protection, guardianship, or curatorship
• Patient already included in another therapeutic study protocol

Patients operated on for carpal tunnel syndrome by the same operator using the Chow technique.