Wolf O, Pannenborg G, Voigtsberger P
Zentralbl Chir. 1977;102(19):1183-7.
There was too much delay in detecting these carcinomas. Radical operation was only possible in 10 cases, only 1 patient survived for 5 years. Improvement of these disappointing results can only be achieved by earlier diagnosis. Fiberscopy and biopsy seem to be suited best to better the results.