Joubert Syndrome 28, also known as jbts28, is related to short-rib thoracic dysplasia 21 without polydactyly and bardet-biedl syndrome 13. An important gene associated with Joubert Syndrome 28 is MKS1 (MKS Transition Zone Complex Subunit 1). Affiliated tissues include liver and cerebellum, and related phenotypes are nystagmus and ataxia