Bilateral mirror image lumbar spinal dural arterial venous fistula: a rare case and systematic review of the literature.

Background: Spinal dural arteriovenous fistulas (SDAVF) are rare with an incidence of 5-10/million annually. They can be difficult to diagnose causing a delay in treatment with significant morbidity. We describe the first case in the literature of a symptomatic mirror lumbar SDAVF which may go unnoticed due to its unique vascular anatomy.

Giant Sacral Schwannoma Treated with a 360 Approach: A Rare Case and Systematic Review of the Literature.

Background: Sacral schwannomas are very rare and typically have a benign nature. They occur in a permissive anatomical location leading to nonspecific symptoms that can result in them going unnoticed before reaching a considerable size.

Case Description: We report a rare case of a giant sacral schwannoma (130 × 110 × 90 mm) in a 38-year-old man originating from the S2 nerve root, encompassing the neural canal with sacral erosion and extension in to the pelvis.