[Neoplastic degeneration of odontogenic cysts. A contribution to the problem of early diagnosis].

This report is dealing with 3 cases of odontogenic cysts which developed carcinomatous changes. It is recommendable to look always carefully for epithelial atypias and to keep marsupialised cysts in control by clinical, radiological and cytological examinations. The excision and histological examination of tissue proliferations in cysts is to advise in any case.