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MR imaging of spindle cell hemangioendothelioma.

Spindle cell hemangioendothelioma is a slowly progressing vascular tumor of low grade malignancy. This neoplasm has been reported in 33 patients but in only one patient were osseous lesions seen. The only other description regarding imaging of this tumor was CT demonstrating soft tissue masses in the thigh without osseous involvement. We present a case of spindle cell hemangioendothelioma in which magnetic resonance further defined the radiographic features of this newly recognized tumor.