Hypertrophic synovial mass resulting in C8 radiculopathy--case report.

A 58-year-old man presented with a hypertrophic synovial mass manifesting as left C8 radiculopathy. Computed tomography revealed hypertrophic changes in the left C7-T1 facet joint and widening of the interarticular space. Magnetic resonance imaging showed left C7-T1 foraminal stenosis attributable to a periarticular mass enhanced with gadolinium. Decompression surgery of the left C8 nerve root was performed. During left C7-T1 facetectomy we detected inflamed soft tissue occupying the interarticular space with extension toward the intervertebral foramen. The mass markedly compressed the left C8 nerve root and was gross totally removed. The histological diagnosis was proliferated fibrous connective tissue compatible with hypertrophic synovial tissue. Postoperatively, his neurological condition improved remarkably. The surgical and pathological findings in our patient indicate that this clinical condition is important in the differential diagnosis in adult patients presenting with cervical radiculopathy.