[Schwannoma in otorhinolaryngology]

In this study 4 cases of Schwannoma are reported. The primary localisation of the tumor in the first case was thought to be near the foreamen lacerum with large areas of bone destruction in the base of the skull. Moreover the internal carotid artery was trophic and thinwalled. In the second patient the onset of the disease must have taken place in childhood as a chronic otitis media. Also in this case the tumor was not diagnosed until it reached a considerable size. The primary localisation was the nervus petrosus superficialis major. In the third patient the neurinoma was located in the facial nerve between the two lobes of the parotid gland. In the fourth case a pedunculated neurinoma of the epipharynx was found. Symptomatology, treatment and differential diagnosis of the Schwannoma are discussed.