[Observations in two cases of primary fibrosarcoma of the lung (author's transl)].

Two cases of primary fibrosarcoma of the lung are reported. The different clinical findings as well as the different courses in both patients reveal problems in diagnosis and treatment of this rare pulmonary lesion. The diagnostic aspects are given and discussed with regards to bronchial carcinoma. It is believed that lobectomy is the rational treatment of primary fibrosarcoma although pneumonectomy must be considered in the indifferentiated typ. The doubtful prognosis requires an exact postoperative follow up in order to have the change of early surgical treatment or irradiation if metastasis or recurrence of the tumor occurs.