Spinal Intradural Arachnoid Cysts
Aarabi et al. (1979) reported father and daughter with surgically proven thoracic intradural arachnoid cysts. Two brothers of the father and another daughter were suspected by history to be affected also. One of these was deceased. The other two, with long-term, progressive, painless paraplegia, refused medical evaluation. The cysts were not associated with increased interpediculate distances or with distichiasis and lymphedema. The authors knew of no similar family.