There are only a few cases of isolated lateral canal deficit described in the literature. This study would focus on this group of patients in order to establish an evolving profile, a recovery behavior that we could compare to that in the literature.

In addition, the evolving profile as well as the other clinical criteria identified would allow investigators to make hypotheses as to the pathology responsible for a given evolutionary profile.

The population studied is represented by adult patients admitted by the emergency consultation service of otolaryngology of the University Hospitals of Strasbourg for an acute unilateral vestibular deficit whose examination at the VHOT shows a reduced and isolated gain of a lateral semicircular canal.

Inclusion criteria

• Major patient
• Man or woman
• Patient who has given their consent to the use of their data.
• Patient treated in the ENT department for dizziness between June 2020 and July 2021.

Non-inclusion criteria

• Patient who expressed his opposition to participating in the study
• Inability to provide the subject with enlightened information (difficulties in understanding the subject, cognitive disorders)
• Subject under safeguard of justice
• Subject under guardianship or guardianship
• Neurological signs on clinical examination

Patient treated in the ENT department for dizziness between June 2020 and July 2021.