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AJR 2003; 180:109-113
© American Roentgen Ray Society

Original report

Mineralization in Musculoskeletal Leiomyosarcoma: Radiologic—Pathologic Correlation

Charles H. Bush1, John D. Reith2 and Suzanne S. Spanier2

1 Department of Radiology, University of Florida College of Medicine, P. O. Box 100374, Gainesville, FL 32610-0374.
2 Department of Pathology, University of Florida College of Medicine, P. O. Box 100275, Gainesville, FL 32610-0275.

OBJECTIVE. Mineralization in leiomyosarcoma, a malignant tumor of smooth muscle, has not been widely recognized. In this article, we report our experience with four cases of primary leiomyosarcoma of soft tissue or bone in which mineralization was visible on either radiography or CT. In none of the cases was the diagnosis of leiomyosarcoma considered before biopsy. In one case of a soft-tissue leiomyosarcoma, the presence of mineralization was a factor that led to the misinterpretation of the needle biopsy specimen as soft-tissue osteosarcoma.

CONCLUSION. Histologically, mineralization in leiomyosarcoma appears to be caused by either nonneoplastic ossification or dystrophic mineralization in the tumor. This feature can cause leiomyosarcomas to be confused with other neoplasms.


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