Case Study: Post-Traumatic Headache and Dizziness in a 6-Year-Old Boy, Arachnoid Cyst
Arachnoid Cyst in the Middle Cranial Fossa with Post-Traumatic Symptoms 1. Cause and Etiology Arachnoid cysts are benign, fluid-filled sacs within the arachnoid membrane, one of the three layers of the meninges surrounding the brain and spinal cord. They are typically filled with cerebrospinal fluid (CSF) and may be: Congenital (Primary) : The majority are thought to arise from developmental anomalies during embryogenesis, such as splitting or duplication of the arachnoid membrane. Acquired (Secondary) : Less commonly, cysts may form due to trauma, infection, hemorrhage, or post-surgical changes that create a CSF-filled cavity within or between arachnoid layers. In the case of post-traumatic symptoms, trauma often does not cause the cyst de novo but rather provokes symptoms from a preexisting cyst by: Rupture or hemorrhage into the cyst Rapid expansion due to CSF dynamics Increased intracystic pressure ...