The<unk>  is a bone lesion that arises in settings of excess osteoclast activity, such as hyperparathyroidism. They are a form of osteitis fibrosa cystica. It is not a neoplasm, but rather simply a mass. It most commonly affects the maxilla and mandible, though any bone may be affected.<unk> rs are radiolucent on x-ray.
Brown tumor
Mantleoma
Neuroma
Ameloblastoma
Hemangioblastoma
Pineocytoma
Hamartoma
Medulloblastoma