Guillain-Barré syndrome as a fatal complication of SARS-CoV-2 infection - An autopsy case.

We presented a case of a 57-year-old female, who was tested positive for SARS-CoV-2 infection and was admitted to a hospital seven days later with signs of early pneumonia. The second day after her admission to the hospital, and nine days after the first positive PCR test, examination showed progressive ascendant weakness of the arms and legs with persisting paresthesia, lab tests showed increased concentration of proteins in the cerebrospinal fluid with albumino-cytological dissociation. She was diagnosed with Guillain-Barré syndrome (GBS). She was on low-flow oxygen support of 3 L/min, with good oxygen saturation (97-99%), without clinical or radiological progression of pneumonia. After receiving a negative PCR test for COVID-19 (11 days after the initial, positive test), four days after admission, she was set to be transferred to a specialized neurology clinic, however, she died unexpectedly during admission. The autopsy showed light to moderate lung edema, signs of moderate to severe coronary atherosclerosis and early myocardial ischemia. Histochemical and immunohistochemical staining of the peripheral nerves sampled from the cervical and brachial plexuses, showed foci of demyelination as well as infiltration with inflammatory cells, predominantly macrophages, and lymphocytes to a lesser degree. It was concluded that the causes of death were a breathing disorder and the paralysis of the diaphragm due to inflammatory polyneuropathy caused by GBS, initiated by SARS-CoV-2 infection. With the lack of similar autopsy cases, we believe that the presented case could be a valuable addition to the understanding of GBS development in SARS-CoV-2 related cases.