A case of primary malignant myxoid fibrous histiocytoma of the lung presenting as a solitary lung nodule in a 61-year-old man is presented. This tumor arose in a patient with a transitional-cell carcinoma of the urinary bladder and a well differentiated squamous-cell carcinoma of the larynx. The differential diagnosis between a primary lung tumor versus a solitary metastasis is difficult and was supported by histological features and the lack of epithelial properties proved by immunohistochemistry. Tobacco was the only etiologic factor known in the patient.
Malignant fibrous histiocytoma - Lung neoplasms
