[Immunological diagnosis of connective tissue diseases (author's transl)]

Collagenoses are diseases which belong to rheumatological disorders however are not easily defined. Especially at the beginning they may show various symptoms typical for one or the other well defined entity as rheumatoid arthritis, systemic sclerosis or lupus erythematodes. Etiology and pathogenesis are nearly unknown. The attempt is made by the author with differentiated descriptions of the multiple laboratory parameters to facilitate the diagnostic classification.