The differing pathophysiologies that underlie COVID‐19‐associated perniosis and thrombotic retiform purpura: a case series

There are two distinctive acral manifestations of COVID‐19 embodying disparate clinical phenotypes. One is perniosis occurring in mildly symptomatic patients, typically children and young adults; the second is the thrombotic retiform purpura of critically ill adults with COVID‐19. To compare the clinical and pathological profiles of these two different cutaneous manifestations of COVID‐19. We compared the light microscopic, phenotypic, cytokine...