There are multiple definitions:

  1. joint hypermobility syndrome(English)

  2. Juberg-Hayward syndrome(English)

    • a rare autosomal recessive malformation syndrome (MIM 216100), characterized by cleft lip/palate, microcephaly, ptosis, hypoplasia or aplasia of thumbs, short stature, dislocation of radial head, and fusion of humerus and radius leading to elbow restriction. Caused by a homozygous mutation in ESCO2. Humeroradial synostosis and radial head dislocation are in the same spectrum of forearm malformations
    • Congenital disorders, Musculoskeletal system
    • https://doi.org…bio.2020.104918