A 44-year-old woman was referred to our hospital because of a suspected left mandibular cyst.Panoramic radiography revealed three ill-defined unilocular radiolucent lesions in the mandible and maxilla. Allthree biopsies were not revealed to the cyst wall, however cemento-osseous dysplasia was diagnosed at only onelesion. After surgical curettage, panoramic radiography demonstrated bone regeneration at the sites of bothlesions. One year 2 months later, a new lesion was detected in the mandible, but a biopsy showed that it lacked acyst wall. These findings indicated that this patient had very rare multiple simple bone cysts of the mandible andmaxilla.
