 Many of these patients will need orthopedic surgeries after SDR.There are a few clinical situations in which it is likely that someone may not be a candidate for the surgery.These situations include those who have suffered meningitis, a congenital (birth-originating) brain infection, congenital hydrocephalus unrelated to the person's premature birth, a person who has suffered head trauma, or a person with some sort of familial disease (e.g., those with hereditary spastic paraplegia are said to not be SDR candidates).