Primary pulmonary fibrous histiocytoma: report of three cases.

Since 1969, fibrous histiocytoma has been recognized as a distinct entity. It occurs in benign and malignant forms. The authors describe two cases of the malignant pulmonary variety, which is considered very rare, and one case of benign pulmonary fibrous histiocytoma. All patients were treated successfully by local excision; there was no recurrence or metastases after a postoperative follow-up of 1 month, 8 years and 7 years respectively. The diagnosis is confirmed histologically according to criteria set forth by the World Health Organization. Treatment is by early complete surgical excision. Further study is needed to determine the merits of radiotherapy and chemotherapy postoperatively.