Supernumerary Phantom Limb After Stroke in the Left Hemisphere: A Case Report

Supernumerary phantom limb (SPL) is a rare sensation of additional limbs that are perceived to exist alongside existing limbs. SPL can occur in various neural regions, but it is rare for SPL to be caused by left hemisphere cerebral infarction. In this report, we describe a case of a 64-year-old woman with SPL after a stroke. She had a history of handedness change. A neurological examination revealed that she had right hemiplegia, unilateral spatial neglect (USN), anosognosia, and pan-sensory loss on the right side of her body. Brain magnetic resonance (MR) imaging disclosed cerebral infarction in the left corona radiata region. She suffered from SPL in the right upper limb. Although SPL was prolonged, the recovery of USN was noted four months after onset, followed by the improvement of SPL.