In addition to other spine relatied issues, I've been diagnosed with dural ectasia, which is a cyst under the membrane of my spine. It is a large cyst in my case, and it cannot be removed as the membrane of the spine cannot be cut into. Many of my doctors have never even heard of it. I was diagnosed at the Cleveland Clinic, but even there, no doctor has heard of anyone other than me who has Dural Ectasia but who does not have Marfan Syndrome (tests confirm I don't). If anyone else has this, I'd like to hear form you. Thanks!