We reviewed a case of myasthenia gravis leading to degenerative scoliosis. The patient was a 62-year-old woman, who has been receiving treatment for myasthenia gravis since 33 years old. Her spinal deformity progressed rapidly during the last 7 years. Magnetic Resonance Image revealed atrophy of the paravertebral muscle and severe compression of the spinal cord. Instrumentation from Th11 to the ilium and posterior decompression were performed. After the operation, low back pain and intermittent claudication disappeared.
