👉 A craniostosis is a rare genetic disorder that affects the brain and spinal cord. It results from an abnormal development of the brain and spine during pregnancy, leading to a condition called neural tube defects (NTDs). This can cause problems with movement, speech, vision, and hearing. There are two main types of craniostosis: neurofibromatosis type 1 (NF1) and neurofibromatosis type 2 (NF2). Both conditions are caused by