Gliomas are characterized by their cell type and grade of malignancy:
Astrocytomas: These tumors have a star-shaped appearance due to the presence of astrocytes. They are graded from I to IV, with grade IV (glioblastoma) being the most aggressive. Oligodendrogliomas: These tumors show a "fried egg" appearance with clear cytoplasm and round nuclei, often accompanied by a network of delicate branching capillaries. Ependymomas: These tumors typically form rosettes or pseudorosettes, with tumor cells arranged around a central lumen or blood vessel.
