エナメル上皮腫の増殖能に関する研究

Abstract

The proliferative activity of ameloblastoma (25 primary, 5 recurrent cases) was examined radiologically, histologically and immunohistochemically. 1. Unicystic ameloblastoma type 1 and 2 (WHO classification, 1992) cases have lower proliferative activity than other types of ameloblastoma. 2. The growth characteristics and proliferative activity of unilocular scalloped margin cases were near those of multilocular cases. It is necessary to distinguish smooth margin and scalloped margin from unilocular. 3. The cases of recurrence, columnar cell type (outer layer cell type), follicular type and plexiform type (WHO classification, 1992) have high tendencies for invasive growth characteristics and proliferative activity. 4. The cases of honeycomb, basal cell type and suspected malignancy have invasive growth characteristics and very high proliferative activity. Mandibular resection is em- ployed in these cases.