A<unk>  is an abnormal opening in the inner ear. This can result in leakage of the perilymph into the middle ear. This includes specifically a perilymph<unk>  (PLF), an abnormal connection between the fluid of the inner ear and the air-filled middle ear. This is caused by a rupture of the round window or oval window ligaments separating the inner and middle ear. Another type of<unk>  is a semicircular canal dehiscence, which allows the inner ear to be influenced by the intracranial pressure directly.
Labyrinthine fistula
Eustachian tube dysfunction
Labyrinthitis
Orbital apex syndrome
Arachnoid cyst
Cavernous sinus thrombosis
Optic nerve sheath meningioma
Vitreous hemorrhage