"type IIA: anterolateral bowing with failure of tubularization and a widened medullary canal"
"type IIB: anterolateral bowing with a cystic lesion before fracture or canal enlargement from a previous fracture"
"type IIC: frank atrophic pseudarthrosis"
"Type I: nondysplastic"
"Type II: dysplastic"
Expected headings
"Type I: nondysplastic"
"Type II: dysplastic"