Radiologists incidentally find choroidal fissure cysts. They turn up on brain MRIs ordered for headaches or head injuries; they look exactly like cerebrospinal fluid, and the standard advice is to leave them alone. The textbook position is that they are benign, incidental, and unrelated to whatever brought the patient in.
A case report from a surgical team in Shandong, China, complicates that position. A 35-year-old woman whose seizures had defeated multiple antiseizure medications for two decades became seizure-free after surgery in the temporal lobe where one of these cysts sat.
