[The modern differential diagnostic possibilities in chordoma].

The authors report five cases with chordoma. The diagnosis has been determined histologically on the basis of the operative material. The chordomas have a slow growth and a tendency to infiltrate the adjacent tissues and organs. That makes their surgical treatment difficult. A characterizing feature for them is the tendency to make recidivations and the difficulty in setting the differential diagnosis in metastasis of light-cell carcinomas.