Histopathology of persistent long COVID toe: A case report.
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| Abstract | :  During the 2020 coronavirus (SARS-CoV-2) pandemic, several cutaneous lesions were identified, including pseudo-chilblain, vesicular, urticarial, maculopapular, and livedo/necrosis. A 59-year-old obese man with probable COVID-19 developed painful cyanosis with histopathologic capillary thrombosis of toes, and the cyanosis persisted for nearly 22 months. Shortly after initial exposure to family members with documented SARS-CoV-2, he developed upper respiratory symptoms, yet his anti-SARS-CoV-2 antibody and nasal swab RT-PCR tests were repeatedly negative. Two family members were hospitalized and one of them succumbed with documented SARS-CoV-2 pneumonia within 10 days of exposure. Biopsy specimen of the distal toe 16 weeks after initial exposure showed papillary dermal capillary thrombosis with endothelial swelling, telangiectasia, and peri-eccrine lymphocytic infiltrates resembling pernio. Overall, this is the first case of biopsy specimen of "long COVID toe" following presumed SARS-CoV-2 exposure, with a demonstration of thrombotic vasculopathy, toe cyanosis, and pernio-like pathology. | 
| Year of Publication | :  2022 | 
| Journal | :  Journal of cutaneous pathology | 
| Volume | :  49 | 
| Issue | :  9 | 
| Number of Pages | :  791-794 | 
| ISSN Number | :  0303-6987 | 
| URL | :  https://doi.org/10.1111/cup.14240 | 
| DOI | :  10.1111/cup.14240 | 
| Short Title | :  J Cutan Pathol | 
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