Presence of an arachnoid cyst at craniospinal junction is not very common. This is a very rare anatomic site. with only seven other cases reported in the literature. We report a case of large intradural craniospinal arachnoid cyst presenting with obstructive hydrocephalus and cranial nerve palsy. https://www.jmannino.com/limited-price-Orange-Carbon-Fiber-Specialty-Material-Galaxy-Buds-Skin-p34260-must-buy/