After examining the case, the woman's neurologist, Asaid Khateb of the hospital's experimental neurophysiology laboratory, called the rare phenomenon credible.
The arm appeared to the woman a few days after suffering a stroke, doctors said.
But this case of what is known as a supernumerary phantom limb (SPL) is a genuine head-scratcher.
The upshot is that the woman can use the apparitional extremity to relieve very real itches on the cheek. It cannot penetrate solid objects. More...
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