Singer Sufjan Stevens relearning to walk after Guillain-Barré Syndrome diagnosis

Singer Sufjan Stevens is on the mend after being diagnosed with the rare autoimmune disorder Guillain-Barré Syndrome.

The Grammy and Oscar-nominated musician shared an update with his fans on his website Wednesday explaining why he hasn't been able to participate in the promotion of his latest album, "Javelin."

"Last month I woke up one morning and couldn't walk," he wrote. "My hands, arms, and legs were numb and tingling and I had no strength, no feeling, no mobility. My brother drove me to the ER and after a series of tests—MRIs, EMGs, cat scans, X-rays, spinal taps (!), echo-cardiograms, etc.—the neurologists diagnosed me with an autoimmune disorder called Guillian-Barre Syndrome."