Spontaneous regression of a large lateral ventricle cyst: illustrative case

This case challenges existing ideas regarding the origin and regression mechanisms of CCs. It demonstrates that lateral ventricle CCs can spontaneously regress, highlighting the need to reconsider their embryological origin, their natural history, and the role of surgery. However, the diagnosis of CC has been solely radiological, and other forms of tumor-like cystic lesions, such as neuroepithelial or ependymal cysts, should be taken into consideration. https://thejns.org/doi/10.3171/CASE25319.