An astrocytoma that affects the optic tract. This condition can be seen in association with neurofibromatosis 1. It is most commonly seen in the pediatric age group. The disease is optic tract astrocytoma (MONDO_0024649). Also known as: astrocytoma (excluding glioblastoma) of optic tract, optic tract astrocytoma (excluding glioblastoma), visual pathway astrocytoma.