Study of a Series of Patients Treated for Retrograde Cricopharyngeal Muscle Dysfunction Syndrome

Inclusion Criteria

• •Major subject (≥18 years old)
• •Subject treated by injection of botulinum toxin into the cricopharyngeal muscle after having had a diagnosis of R-CPD in consultation between January 1, 2022 and December 31, 2022
• •Subject not opposing the reuse of their data for the purposes of this research.