Ameloblastome des Oberkiefers
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Ameloblastomas of the upper jaw
Ameloblastomas usually arise in the mandible, very rarely (15–20%) in the maxilla.
The tumour is characterized by its slowly infiltrating and destructive growth, a lack of typical roentgenological structures in the upper jaw and the occurrence of multiple recidives after incomplete resections. The histologic structure of the ameloblastoma and some of its variants are described.
Because of its histologic and clinical similarity the ameloblastoma must be differentiated from the adenoidcystic carcinoma and the craniopharyngeoma.
An evaluation of case reports in literature shows — as well as our own experience — that ameloblastomas of the upper jaw must be operated radically from the beginning like carcinomas. Irradiation can only achieve temporary remission of the tumour.