Profound persistent eosinophilia in a patient with spontaneous renal atheroembolic disease

We describe an elderly women who died of renal failure secondary to spontaneous renal atheroembolic disease. The sole clinical clue to this diagnosis was a profound eosinophilia up to 19,100/mm3 and a relative eosinophil count of 80%. Renal atheroembolic disease should be a prominent consideration in any patient with both renal insufficiency and peripheral eosinophilia.