[Cotrimoxazole in Wegener's granulomatosis--a prospective study].

During the last 3 years 34 patients with Wegener's granulomatosis (W. G.) were treated 37 times with co-trimoxazole (Co-trim). In 10 patients with locoregional disease the progression of W. G. could be stopped in each case. In 27 cases (24 patients) with generalized W. G. in complete remission achieved with cyclophosphamide and prednisolone (Cyc/Pred) a relapse occurred in more than 50% (14/27) of the cases.