Joint hypermobility is a common finding, differing strongly between sexes and among races.¹ Joint hypermobility is not a disease in itself, but it can be part of heritable connective tissue disorders, such as Marfan syndrome, Ehlers-Danlos syndrome (EDS), and benign joint hypermobility syndrome (BJHS).² Although Marfan syndrome and most types of EDS are clinically relatively easy to distinguish by their cardinal features, it is often less easy to differentiate between the hypermobility type of EDS (HT-EDS, formerly type III) and BJHS. Recently, Grahame et al proposed a validated set of diagnostic criteria for BJHS³: the revised Brighton 1998 criteria. Its major criteria are a Beighton score of 4/9 or greater and arthralgia, but …