Postirradiation malignant fibrous histiocytoma.

A slowly growing, firm, asymptomatic tumor developed in the skin overlying the left scapula of a 72-year-old woman during a six-month period. Twenty-seven years earlier, she had radiation treatment to that site for an intraductal carcinoma of the left breast. The histopathologic diagnosis was malignant fibrous histiocytoma (MFH). The rarity of this late complication of radiation therapy is reflected by a few reports in the medical literature of cutaneous MFH as late radiation sequelae.