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Cortical superficial siderosis (cSS), also referred to as sulcal siderosis, is a neurological condition characterized by hemosiderin subpial deposits in the cortical sulci over the convexities of cerebral hemispheres. These deposits are further found sparingly in the spinal cord, brainstem, and cerebellum. Patients typically present with transient focal neurological symptoms that make cSS challenging to differentiate from other acute neurological processes such as transient ischemic attacks (TIA), focal seizures, and acute convexity subarachnoid hemorrhage (cSAH). This condition is presently recognized as a characteristic feature of the age-associated disorder referred to as cerebral amyloid angiopathy (CAA). This paper describes a patient who presented with transient neurologic symptoms, first suspected to be secondary to acute subarachnoid hemorrhage (SAH), found to have cSS and cerebral amyloid angiopathy.

Delayed Identification of Cortical Superficial Siderosis in a Patient with Recurrent Transient Focal Neurological Symptoms: A Case Report