<unk>  can be associated with the genetic condition neurofibromatosis type 1 (NF1), and optic nerve gliomas are among the most frequently encountered tumors in<unk> tients with this disorder. The majority of<unk> s, however, arise sporadically - with no evidence of a link to an underlying hereditary predisposition or lifestyle factor. They are associated with genetic alterations in the MAPK/ERK<unk> thway, most frequently a characteristic KIAA1549-BRAF fusion gene.
Pilocytic astrocytoma
Fibrillary astrocytoma
Neurothekeoma
Pinealoma
Subependymal giant cell astrocytoma
Central neurocytoma
Subependymoma
Anaplastic astrocytoma