congenital contractural arachnodactyly

noun

congenital con·​trac·​tur·​al arachnodactyly -kən-ˈtrak-chə-rəl-, -kän- 

: a disorder that is similar to or a variant of Marfan syndrome, is inherited as a dominant autosomal trait, and is characterized especially by arachnodactyly, joint contracture, and scoliosis

called also Beals syndrome