Magnetic resonance neurography findings in three critically ill COVID-19 patients with new onset of extremity peripheral neuropathy

Introduction
Coronavirus-19 (COVID-19) is most commonly associated with respiratory syndromes, although patients are presenting more frequently with neurological symptoms. When they occur, neurological conditions most commonly involve the central nervous system, and peripheral nervous system effects, particularly in the extremities, have been less commonly described. The mechanisms of peripheral neuropathy in critically ill patients with COVID-19 are likely to be multifactorial, and extremity peripheral nerve imaging in these cases has not been well described.

Case presentation
In this case series, we describe the magnetic resonance neurography (MRN) findings in 3 critically ill patients who presented with new onset of peripheral neuropathies in the extremities, and we discuss possible common mechanisms of nerve injury, including the role of position-related nerve injury.

Conclusions
MRN can be useful in identifying and localizing peripheral nerve abnormalities in the extremities of COVID-19 patients, and patients who are placed in the prone position during ventilation may be more susceptible to these injuries.