Background: Arachnoid cysts are cerebrospinal fluid (CSF) fluid-filled sacs that are located between the brain and spinal cord. Spinal column arachnoid cysts are rare and mostly asymptomatic. being mostly located in intradural regions. We reported a patient who presented with neurological deficits and mid-thoracic extradural arachnoid cyst treated with en-bloc resection. https://parisnaturalfoodes.shop/product-category/silca-herbal-toothpaste/