Four types of<unk>  have been described by the WHO 2017 classification: * Conventional (solid/multicystic) type<unk>  * Unicystic<unk>  * Peripheral/extraosseous<unk>  * Metastasising<unk>  Conventional<unk>  Previously known as solid/multicystic<unk> . Usually presents with multiple large cystic areas. Unicystic<unk> <unk>  with a single cyst cavity account for around 10% of<unk> s. Present in younger patients in their second and third decades of life, often in relation to unerupted third molar. Metastasising<unk>  Histologically atypical<unk>  can, rarely, lead to metastasis, usually in the lung. 'Metastasis' look histologically identical to the primary tumour and are benign in nature. Peripheral<unk>  The peripheral subtype composes 2% of all<unk> s.
Ameloblastoma
Medulloblastoma
Hemangioblastoma
Sialoblastoma
Neurothekeoma
Glioblastoma
Pineoblastoma
Neuroma