Oligodendroglioma is a type of brain tumor derived from oligodendrocytes--a type of glial cell in the central nervous system. It is typically an adult brain tumor, and it is most often found in the frontal lobes of the brain. Characteristically, biopsy reveals "fried egg cells," which contain clear, vacuolar cytoplasm surrounding a round nucleus. This appearance is due to the presence of fat in oligodendrocytes, which makes sense as they are responsible for creating the fatty myelin sheaths surrounding neurons. Another high-yield biopsy finding is that of "chicken wire capillaries," which is another buzzword associated with oligodnedroglioma. Finally, oligodendrogliomas often undergo calcification, which causes them to appear hyperdense on CT scans.