Table 2.
Historically WHO malign odontogenic tumor classification from 1971 to 2017.
| 1971 WHO classification | 1992 WHO classification | 2005 WHO classification | 2017 WHO classification |
|---|---|---|---|
| Odontogenic carcinomas | Odontogenic carcinomas | Odontogenic carcinomas | Odontogenic carcinomas |
| Malignant ameloblastoma | Malignant ameloblastoma | Metastasizing (malignant) ameloblastoma | Ameloblastic carcinoma |
| Primary intra-osseous carcinoma | Primary intraosseous carcinoma | Ameloblastic carcinoma - primary type | Primary intraosseous carcinoma |
| Other carcinomas arising from odontogenic epithelium, including those arising from odontogenic cysts | Malignant variants of other odontogenic epithelial tumors | Ameloblastic carcinoma-secondary type, intraosseous | Sclerosing odontogenic carcinoma |
| Odontogenic sarcomas | Malignant changes in odontogenic cysts | Ameloblastic carcinoma-secondary type, peripheral | Clear cell odontogenic carcinoma |
| Ameloblastic fibrosarcoma (ameloblastic sarcoma) | Odontogenic sarcomas | Primary intraosseous squamous cell carcinoma - solid type | Ghost cell odontogenic carcinoma |
| Ameloblastic odontosarcoma | Ameloblastic fibrosarcoma (ameloblastic sarcoma) | Primary intraosseous squamous cell carcinoma derived from keratocystic odontogenic tumor | Odontogenic carcinosarcoma |
| Ameloblastic fibrodentino-and fibro-odontosarcoma | Primary intraosseous squamous cell carcinoma derived from odontogenic cysts | Odontogenic sarcomas | |
| Clear cell odontogenic carcinoma | |||
| Ghost cell odontogenic carcinoma | |||
| Odontogenic sarcomas | |||
| Ameloblastic fibrosarcoma | |||
| Ameloblastic fibrodentino-and fibro-odontosarcoma |