Joint<unk> syndrome shares symptoms with other conditions such as Marfan syndrome, Ehlers-Danlos Syndrome, and osteogenesis imperfecta. Experts in connective tissue disorders formally agreed that severe forms of<unk> Syndrome and mild forms of Ehlers-Danlos Syndrome<unk> Type are the same disorder. Generalized<unk> is a common feature in all these hereditary connective tissue disorders and many features overlap, but often features are present that enable differentiating these disorders. The inheritance pattern of Ehlers-Danlos syndrome varies by type. The arthrochalasia, classic,<unk> and vascular forms usually have an autosomal dominant pattern of inheritance. Autosomal dominant inheritance occurs when one copy of a gene in each cell is sufficient to cause a disorder. In some cases, an affected person inherits the mutation from one affected parent. Other cases result from new (sporadic) gene mutations. Such cases can occur in people with no history of the disorder in their family. The dermatosparaxis and kyphoscoliosis types of EDS and some cases of the classic and<unk> forms, are inherited in an autosomal recessive pattern. In autosomal recessive inheritance, two copies of the gene in each cell are altered. Most often, both parents of an individual with an autosomal recessive disorder are carriers of one copy of the altered gene but do not show signs and symptoms of the disorder. Beighton criteria Beighton score criteria: one point for each elbow and knee that hyperextends by 10 degrees or more (4 points), one for each little finger that bends back by 90 degrees (2 points), one for each thumb which can be touched to the forearm (2 points), and one for touching the floor with the palms. As of July 2000,<unk> was diagnosed using the Beighton criteria. In 2017, the criteria changed, but still involve the Beighton score. The Beighton criteria do not replace the Beighton score but instead use the previous score in conjunction with other symptoms and criteria. HMS is diagnosed in the presence of either two major criteria, one major and two minor criteria, or four minor criteria. The criteria are: Major criteria * A Beighton score of 5/9 or more (either current or historic) * Arthralgia for more than three months in four or more joints Minor criteria * A Beighton score of 1, 2 or 3/9 (0, 1, 2 or 3 if aged 50+) * Arthralgia (> 3 months) in one to three joints or back pain (> 3 months), spondylosis, spondylolysis/spondylolisthesis. * Dislocation/subluxation in more than one joint, or in one joint on more than one occasion. * Soft tissue rheumatism. > 3 lesions (e.g. epicondylitis, tenosynovitis, bursitis). * Marfanoid habitus (tall, slim, span/height ratio >1.03, upper: lower segment ratio less than 0.89, arachnodactyly; positive Steinberg finger / Walker wrist signs). * Abnormal skin: striae, hyperextensibility, thin skin, papyraceous scarring. Beighton score The Beighton score is an edited version of the Carter/Wilkinson scoring system which was used for many years as an indicator of widespread<unk> . Medical professionals varied in their interpretations of the results; some accepting as low as 1/9 and some 4/9 as a diagnosis of HMS. Therefore, it was incorporated, with clearer guidelines, into the Beighton Criteria. The Beighton score is measured by adding 1 point for each of the following: * Placing flat hands on the floor with straight legs * Left knee bending backward * Right knee bending backward * Left elbow bending backward * Right elbow bending backward * Left thumb touching the forearm * Right thumb touching the forearm * Left little finger bending backward past 90 degrees * Right little finger bending backward past 90 degrees Beighton test in a person with a 9/9 score
Hypermobility 
Ehlers–Danlos syndromes
Lattice degeneration
Joint locking 
Dispokinesis
Dystrophy
Ligamentous laxity
Zoobiquity