In addition, Joubert syndrome (JBTS, OMIM #213300), as a ciliopathy, is not associated with obesity generally, but, recently, Sophie et al. [32] found that a patient with JBTS caused by mutations in the ARL13B gene exhibited an obesity phenotype, expanding the spectrum of JBTS. Here, ARL13B is linked to obesity due to melanocortin 4 receptor deficiency.