COVID-19 associated Bell's Palsy and lumbosacral neurolymphomatosis in a patient with B-cell lymphoma-Case Report.

This is a case of acute onset unilateral Bell's Palsy during COVID-19 illness, coinciding with development of progressive leg pain, weakness, and sensation change. The patient was ultimately found to have a large B-cell lymphoma mass invading the sciatic nerve, lumbosacral plexus and the spinal canal with compression of cauda equina consistent with neurolymphomatosis. Although COVID-19 infection has been associated with Bell's palsy, Bell's palsy has also been reported with lymphoid malignancy. We review current literature on the association of Bell's palsy with COVID-19 infection and lymphoid malignancy, as well as review the diagnostic challenges of neurolymphomatosis. Providers should be aware of the possible association of Bell's palsy as harbinger of lymphoid malignancy.