2025-11-272025-11-27http://hdl.handle.net/2263/105612Clinical history : A 16-year old girl with family history of osteopetrosis developed progressive deafness and urgent posterior cranial fossa decompression was done.She regained consciousness, but died later the same day.Autopsy findings : 1. Osteopetrosis.2. Raised intracranial pressure and cerebellar cone formation.Diagnosis: Osteopetrosis (marble bone disease)