Monitoring of the Safety and the Performance of the Endoscopic Cap Electrode (ECE50)

Inclusion Criteria: * Legal adults (i.e., as a general rule patients ≥ 18 years old) * Legal adults requiring a diagnosis for a disorder that could be traced back to uni- or bilateral dysfunction of one or more laryngeal muscle(s) of the posterior cricoid region * Signed and dated informed consent before the start of any registry-specific procedure for all the recruited subjects Exclusion Criteria: * Lack of compliance with any inclusion criteria * Use of an active medical implant * Known allergies or intolerance to the material used for this registry * Parallel participation in a device/drug registry in the period of data collection, which could confound the results of the registry * Anything that, in the opinion of the Registry Responsible, would place the subject at increased risk or preclude the subject's full compliance with the general requirements of this registry