Yunis-Varon syndrome

Yunis-Varon syndrome (YVS) is a rare autosomal recessive condition characterized by limb defects, ossification defects, generalized hypotrichosis and, frequently, a severe neonatal course. Frameshift and missense mutations of FIG4 in affected individuals from unrelated families have been identified. FIG4 encodes a phosphoinositide phosphatase required for regulation of PI(3,5)P2 levels, and thus endosomal trafficking and autophagy.