• Nirav K Pandya, Joshua D Auerbach, Keith Baldwin, Richard D Lackman, and Kingsley R Chin.
• Spine Surgery and Orthopaedic Oncology Services, Department of Orthopaedics, University of Pennsylvania Medical School, Philadelphia, PA 19104, USA.
• Spine. 2006 Nov 15; 31 (24): E920-4.

Study DesignCase report.ObjectiveTo report on thoracic spinal cord compression caused by a mass in a 66-year-old female with new onset of myelopathic symptoms and a history of multiple hereditary exostoses.Summary Of Background DataTo our knowledge, there have been no previous reports of spinal cord compression in a patient with multiple hereditary exostoses caused by breast adenocarcinoma metastatic to osteochondromas of the spine. METHODS.: Chart, pathologic, and radiographic documentation of the preoperative and postoperative clinical course of the patient was used.ResultsThe patient had resolution of her neurologic symptoms following wide surgical excision, decompression, and stabilization from T2 to T10. The patient's mass was found to be breast adenocarcinoma metastatic to osteochondromas of the spine.ConclusionsWhen faced with a patient with a history of multiple hereditary exostoses with new onset of myelopathic symptoms and a mass compressing the spinal cord, the clinician's differential should be broad and always initially include a metastatic lesion, osteochondroma, or chondrosarcoma.

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