Dural ectasia
From Marfan Friends World Wiki
The dura is the membrane (thin layer of cells) which lines your brain and spinal cord. Dura ectasia is a condition that occurs when the dura becomes weakened, and expands outwards.
People with Marfan syndrome are at particular risk of developing dura ectasia. As the membrane expands, it can press on the vertebrae (the bones which make up your spine) in your lower back. This can cause backache, headache, and numbness, or pain, in your legs.
