Simple bone cyst. Report of two cases.

Two cases of simple bone cyst are presented. The first is unusual because of its radiologic appearance simulating ameloblastoma and its prolonged healing time, requiring surgical intervention on several occasions. The second is presented because of the occurrence of bilateral cysts, of which there are only eight other reported cases. It is postulated that the first case might represent a single large simple bone cyst that had several chambers with tenuous connections or that it might be an example of multiple simple bone cysts in close proximity.