Electromyographic abnormalities in Paget disease of the thoracolumbar vertebral column.

This report describes a patient with Paget disease of the lower thoracic and lumbosacral vertebrae who developed slowly progressive paraparesis. The electromyographic findings were abnormal in the thoracolumbar paraspinal muscles and the right medial gastrocnemius muscle. In the presence of a normal myelogram, we concluded that the denervation found by electromyography was due to neural ischemia rather than mechanical compression of neural tissue, as is sometimes the case.