[Kidney involvement in "mixed connective tissue disease" (Sharp syndrome)].

The case in question of the Sharp-syndrome is a mixed collagenosis with symptoms of sclerodermia, Erythematodes visceralis, dermatomyositis and rheumatoid arthritis. Apart from the clinical symptomatology the immunological profile is decisive for the ascertainment of the diagnosis. With the help of 3 descriptions of cases is referred to a frequent participation of the kidneys, particularly histologically and immune-histologically. In contrast to the hitherto existing publications also in missing pathological findings of the urine a renal biopsy should be aspired to, since important therapeutic and prognostic considerations are dependent on this.