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The paper describes the clinical symptoms and biochemical tests carried out in two girls suffering from Ehlers-Danlos syndrome. The most typical clinical feature, which is common to both cases, was the presence of skin alterations at the extensor surface level of elbows and, above all, knees. These alterations appeared to be delimited areas with irregular margins where the skin was thin, dry, hyperpigmented, wrinkled, with scanty or absent subcutaneous tissue. Biochemical tests carried out on cutaneous fibroblast cultures excluded the presence type I collagen alterations and an altered secretion of type I or III procollagen secretion. The Authors discuss the attribution of cases presented within the context of the various forms of Ehlers-Danlos syndrome in relation to clinical findings and the results of the biochemical tests.

After a bibliographical revue on progressive spinal amyotrophy the nosographical aspects of the various forms are discussed, above all the proximal ones. Considering personal observations, the conclusion is that a definite differences is the various forms of proximal spinal amyotrophy does not exist and today they are different expressions of the same illness.