A retrospective study was undertaken to analyse the etiology, site and treatment procedures of 30 pathological fractures of the mandible. Fifty percent of the fractures had an inflammatory cause. The remaining cases were associated with severe atrophy of edentulous mandibles (4), benign tumours (3), cysts (3), and primary or secondary malignancies (5). Regardless of the cause, the majority of the fractures occurred in the body of the mandible. Pathological fractures of the mandible most often have to be treated by eliminating the cause of the underlying condition while immobilizing the fragments either with osteosynthesis or archbars and intermaxillary fixation.