A 45-year-old woman in Japan was sent to a university hospital for possible urgent spinal surgery after an MRI showed a mass inside her spinal canal. Her surgeons held off. They treated her with steroids instead, and within two months the mass had disappeared.
It did not stay gone. Over the next two years, it returned twice, vanishing each time with more steroids, and she was eventually diagnosed with sarcoidosis in her heart. More than six years later, she has never had spinal surgery and reports no pain or numbness.