Types Genetic changes are related to the following types of<unk> : *<unk> , COL2A1 (75% of<unk>  cases) *<unk> , COL11A1 *<unk> , COL11A2(non-ocular) *<unk> , COL9A1 (recessive variant) *<unk> , COL9A2 (recessive variant) *<unk> , COL9A3 (recessive variant) *<unk> , LOX3 (Recessive, 7 cases reported) Whether there are two or three types of<unk>  is controversial. Each type is presented here according to the gene involved. The classification of these conditions is changing as researchers learn more about the genetic causes.
Stickler syndrome
White Sutton syndrome
Hurler syndrome
Avellis syndrome
Sugarman syndrome
Setleis syndrome
Leschke syndrome
Noonan syndrome