| Thrombotic microangiopathy | |
|---|---|
 | |
| Micrograph of thrombotic microangiopathy with the characteristic onion-skin layering seen in older lesions. PAS stain. | |
| Specialty | Rheumatology  |
Thrombotic microangiopathy (TMA) is a pathology that results in thrombosis in capillaries and arterioles, due to an endothelial injury.[1] It may be seen in association with thrombocytopenia, anemia, purpura and kidney failure.
The classic TMAs are hemolytic uremic syndrome and thrombotic thrombocytopenic purpura. Other conditions with TMA include atypical hemolytic uremic syndrome, disseminated intravascular coagulation, scleroderma renal crisis, malignant hypertension, antiphospholipid antibody syndrome, and drug toxicities, e.g. calcineurin inhibitor toxicity.[1]