“…In rare cases, abnormal expansion of these cavities causes neurologic symptoms by compressing neighboring structures, in which case we refer to them as symptomatic cysts. 1,2 Clinical symptoms can be expected in cysts more than 10 mm wide (those smaller than this have not thus far proved to be symptomatic). 3,4 These include headaches, visual impairment, seizures, and autonomous system disorders such as mood swings, erratic behavior, memory impairment, delayed development, learning difficulties, anorexia, weight loss, and incontinence.…”