Schwannomas, sometimes known as neurilemomas, are proliferations of Schwann cells that are encapsulated by perineurium. These tumors have a characteristic biphasic pattern of solid areas with nuclear palisading (Antoni A pattern) and myxoid areas (Antoni B pattern). These tumors are usually well encapsulated and can be excised with relative ease. Hypercellular schwannomas sometimes recur even after what was thought to be complete removal, but they seldom undergo malignant transformation.
Excerpted from BCSC 2020-2021 series: Section 10 - Glaucoma. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.