Mononeuropathy Multiplex After Severe SARS-CoV-2 Infection: A Case Series and Literature Review.

Introduction: Peripheral nerve injuries are being increasingly recognized in patients recovering from severe SARS-CoV-2 infections. Axonal neuropathies can occur, leading to lasting and disabling deficits.

Case reports: We present the cases of 3 patients who developed weakness and sensory symptoms after severe SARS-CoV-2 pneumonia. The clinical deficits revealed various patterns of injury including a mononeuropathy multiplex (MNM) in the first patient, a brachial plexopathy with superimposed MNM in the second patient, and a mononeuropathy superimposed on a polyneuropathy in the third patient. Electrodiagnostic studies revealed axonopathies. The patients with MNM were left with severe disability. The third patient returned to his baseline level of functioning.

Conclusions: Severe SARS-CoV-2 infections can result in disabling axonopathies. Possible explanations include ischemic nerve damage from the profound inflammatory response and traumatic nerve injuries in the ICU setting. Preventing severe disease through vaccination and antivirals may therefore help reduce neurologic morbidity.