Pneumosinus Dilatans, Klippel-Trenaunay-Weber syndrome, and progressive visual loss

A patient with Klippel-Trenaunay-Weber (KTWS), pneumosinus dilatans, and familial Adie's syndrome who developed bilateral perioptic meningiomas is described. This case demonstrates the efficacy of fine-needle aspiration biopsy for tissue diagnosis of optic nerve tumors in blind eyes.