 This study investigated the association between different types of thrombotic microangiopathy, TMA, and their underlying etiologies. It was found that the majority of patients with AHEUS had thrombosis in 60%, MPGN-like pattern in 20%, and ischemia in 20%. In addition, those with STECHUS had thrombosis, 14.3% MPGN-like pattern, 14.3% endothelial swelling, 14.3% and ischemia, 57.1%. Finally, those with secondary etiologies had thrombosis, 58.3% endothelial swelling, 16.7% ischemia, 16.7%, and MPGN-like pattern, 8.3%. Overall, this study suggests that the distribution of classic TMA findings is not related to etiology, as thrombosis was found in all three groups, while ischemia was found mainly in STECHUS. Additionally, no specific histopathological pattern was associated with any particular etiology. This article was authored by Miguel Hernández Neto, Lucas de Marais Solar, Jaleta Vieira Gal Lindo Vasconcelos, and others. We are article.tv, links in the description below.