dural ectasia.. Neurofibromatosis. Ankylosing spondylitis. Ehler Danlos syndrome. Marfan syndrome

Following shows dural ectasia except
A- Neurofibromatosis. AD... (10% have dural ectasia)
B- Ankylosing spondylitis... Rare
C- Ehler Danlos syndrome.
D- Marfan syndrome. (caused by posterior vertebral scalloping)
E- Osteogenesis imperfecta... AD
F- Gaucher's disease... This