Epidural lipomatosis simulating an epidural abscess: case report and literature review.

A case of epidural lipomatosis in a 49-year-old man presenting with paraparesis, midthoracic pain, and Staphylococcus aureus pneumonia is reported. The patient had been on low dose corticosteroid therapy for 7 years for rheumatoid arthritis. The clinical and myelographic findings suggested a diagnosis of epidural abscess, but the only abnormality discovered at operation was abundant fatty tissue in the dorsal epidural space significantly compressing the spinal cord, and this was partially removed. Postoperative neurological improvement suggested that the lipomatosis was responsible for the spinal cord compression and dysfunction. If this diagnosis had been suspected, it might have been confirmed by magnetic resonance imaging or postmyelography computed tomographic scanning. With such a diagnosis, an alternative treatment could have been to decrease the steroid dose, observe for clinical improvement, and perhaps avoid operation.