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How is Ehlers-Danlos Syndrome divided?
classical, hypermobility, vascular, kyphoscoliosis, arthrochalasia, and dermatosparaxis
What is Ehliers-Danlos Syndrome Dermatosparaxis Type?
To get horny for a long period of time. Um, no. And if that lasts more than four hours, dude, call your doctor. ;-) The Dermatosparaxis Type of EDS (formerly Type 7C) is extremely rare, with about 10 cases identified ever. It is characterized by extremely fragile, sagging skin and is caused by a defect in the ADAMTS2 gene. Mutations in this gene cause a dramatic reduction in the enzyme produced by this gene; the reduction in the enzyme means that procollagen is not processed correctly, so that collagen fibrils aren't formed correctly, so that the connective tissue within the body is very weak. My understanding is that the common symptoms of the three more prevalent types (hypermobility, classic, and vascular) can be present in any of the more rare forms of EDS.
How common is Ehlers-Danlos Syndrome?
Although it is difficult to estimate the overall frequency of Ehlers-Danlos syndrome, the combined prevalence of all types of this condition may be about 1 in 5,000 individuals worldwide. The hypermobility and classic forms are most common; the hypermobility type may affect as many as 1 in 10,000 to 15,000 people, while the classic type probably occurs in 1 in 20,000 to 40,000 people. Other forms of Ehlers-Danlos syndrome are very rare. About 30 cases of the arthrochalasia type and fewer than 60 cases of the kyphoscoliosis type have been reported worldwide. About a dozen infants and children with the dermatosparaxis type have been described. The vascular type is also rare; estimates vary widely, but the condition may affect about 1 in 250,000 people.
