“…[ 14 ] It has varied pathogenesis and etiologies, such as infectious diseases, splenic occupying diseases, hematological diseases, drug-induced events, and splenic artery aneurysm. [ 14 – 16 ] Our case was the first with pathologically-proven splenic TMA induced by MHT and based on the direct pathological characteristics of the spleen, such as hyaline degeneration in the small artery wall, focal fibrous necrosis, thrombosis, and partial small vessel occlusion. In theory, MHT could damage the micro-endothelial cells of viscera such as spleen by elevated shear stress, inflammation, over-activation of complement, aberrant coagulation “storm” and so on, besides the more often targeted organs like kidney, brain and heart.…”