<prompt> Cause of congenital pseudoahrosis is:Intrauterine fractureNeurofibromatosisFibrous dysplasiaUnknown  <response>: Neurofibromatosis is an association it is not a cause Most Common Cause of Pseudoahrosis - Idiopathic Neurofibromatosis NF-1 - Actually an association, not a cause Extra edge Musculoskeletal abnormalities in neurofibromatosis Pseudoahrosis oftibia Sho stature Scoliosis Most common Limb hyperophy due to multiple neurofibromas Distinctive osseous lesion: sphenoid dysplasia or coical thinning of long bones. 