A retrospective study of 22 patients who had surgical treatment for recurrent ameloblastoma of the jaws at our clinic, within a period of 16 years, was carried out. (1) The recurrent lesion in 18 patients was due to an inadequate previous operation; (2) massive soft-tissue recurrences even after wide mandibular resection occurred in 4 patients; and (3) a malignant transformation was noted in 1 patient.
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