Hypertrophic pulmonary osteoarthropathy and metastases from a malignant fibrous histiocytoma.

Malignant fibrous histiocytoma is a recently accepted member of the mesenchymal group of tumors. Hypertrophic pulmonary osteoarthropathy is rarely seen with metastatic lung disease but when it occurs it is most frequently described with sarcomatous tumor metastases. In the case reported here, this phenomenon developed with pulmonary metastases from a malignant fibrous histiocytoma, indicating that this tumor resembles other sarcomas in giving rise to this unusual clinical syndrome.