Arachnoid cysts are non-tumorus fluid collections due to abnormality in the embryonic development of the arachnoid membrane. In this study, a surgically treated arachnoid cyst that presented with intracystic hemorrhage and subdural hematoma developed spontaneously is presented. The patient was admitted to the clinic with headache, vertigo, vomiting and somnolence. There was no history of trauma. Computerized tomography revealed intracystic hemorrhage and subdural hematoma on the same side. The patient underwent surgical intervention and improved post-operatively. This is the twenty-second case of spontaneous intracystic hemorrhage and subdural hematoma which developed on the basis of arachnoid cyst in the literature.
Keywords: Arachnoid cyst, spontaneous intracystic hemorrhage, subdural hematoma
