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.roneverhart.com/Mabis-Dmi-Healthcare-3-In-1-All-Purpose-Commode-by-Briggs-Healthcare/