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  • Title: Bronchial brushing cytology features of primary malignant fibrous histiocytoma of the lung. A case report.
    Author: Fujita Y, Shimizu T, Yamazaki K, Hirose T, Murayama M, Yamazaki Y, Matsumoto H, Tobise K.
    Journal: Acta Cytol; 2000; 44(2):227-31. PubMed ID: 10740611.
    Abstract:
    BACKGROUND: Malignant fibrous histiocytoma (MFH) of the lung is rare. Early diagnosis is very important because of its poor prognosis. Long-term survivors of pulmonary MFH are patients who had surgical resection. When the patient can undergo surgery after a prompt diagnosis, the prognosis improves more than with other therapy. However, it is not easy to establish the diagnosis of thoracic MFH. In general, the small fragments from bronchial or percutaneous transthoracic fine needle aspiration (FNA) biopsies are inadequate for cytologic or pathologic analysis. Bronchial brushing cytology is greatly superior to FNA cytology because one can obtain a large amount of cells. Therefore, bronchial brushing cytology may play a useful role in diagnosis when endobronchial involvement is found. CASE: A 65-year-old female was admitted with a cough, yellow sputum and exertional dyspnea. A chest roentgenogram showed a 12 x 12-cm mass in the left lung field. Bronchial brushing cytology revealed many fibroblastlike, histiocytelike, bizarre and multinucleated giant cells in a background of necrosis. Atypical mitotic figures were also found. The cytologic findings strongly suggested MFH. Although the pathologic findings from FNA biopsy showed storiform clusters structured by pleomorphic, fibroblastlike cells with bizarre nuclei and mitotic figures, the material was too small to diagnose it definitively. Six months later the patient died. An autopsy confirmed the diagnosis of MFH: the typical storiform clusters were composed of many fibroblastlike and histiocytelike cells that were positive for CD68 (PGM1) antibody. CONCLUSION: Bronchial brushing cytology may be a useful method for early, definitive diagnosis of MFH. The presence of pleomorphic, spindle-shaped fibroblastlike and histiocytelike cells with the clusters showing a storiform pattern may permit the diagnosis of MFH.
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