=Acute Suppurations.=—Acute suppurative diseases of the labyrinth occasionally result from the extension of infection from the tympanum but they are certainly very rare. Such conditions may result from acute suppurative otitis media in which there has been an excessive collection of pus without rupture of the drum or drainage through the tube but this very rarely occurs and after drainage has been established, labyrinthine infection is hardly possible. =Diagnosis.=—Labyrinthitis is of several forms but in general, there are the symptoms of labyrinthine involvement such as: nystagmus, vertigo, nausea, vomiting, headache, earache, deafness and febrile symptoms. When labyrinthitis is suspected, an aurist of much experience should be called into consultation at once. =Treatment.=—Suppurative labyrinthitis is not in itself a fatal disease but dangerous complications may result because of the close proximity to so many delicate structures. Threatened meningeal infection requires surgical drainage, but unless meningeal infection is imminent, surgery is contraindicated. Since the mortality, considering dangers of complications, is not high (about 10%) and since such operations are very complicated and require great surgical skill, we may conclude that surgery is generally contraindicated. Non-surgical treatment consists of keeping the patient quiet in bed, liquid diet, and good elimination. Drainage through the middle ear or Eustachian tube must be maintained. Deep manipulation of the cervical structures will help to maintain lymphatic drainage but any treatment which necessitates much movement of the head should be avoided until the symptoms of vestibular irritation have ceased. Non-Suppurative Labyrinthine Diseases =Meniere’s Disease.=—This disease is caused by hemorrhage into the labyrinth with the following symptoms: There is sudden and intense vestibular irritation such as vertigo, marked tinnitus, nausea, vomiting and complete deafness on the affected side. There may also be cerebral disturbances and loss of consciousness. =The Prognosis= depends upon the extent and severity of the pathology. It is probable that those cases in which recovery occurs quickly are not true cases of Meniere’s disease but have some causes other than labyrinthine hemorrhage. Such cases are perhaps Meniere’s Symptom Complex. =The Treatment= consists of complete rest in bed, light diet, and good elimination until the marked irritation has passed. It has been my practice to carry out further treatment similar to that of the treatment of nerve deafness to be given later. Many of these cases will make complete recovery. Nerve Deafness The term “nerve deafness” is generally used very carelessly to apply to any chronic or non-suppurative process of the labyrinthine structures other than those mentioned above, which cause impaired hearing.