Low power histology of angiomyolipoma showing sharp circumscription. This is a muscle rich variant (solid eosinophilic areas dominate) with only scattered adipose tissue (interspersed cleared areas).
Medium power histology of angiomyolipoma with mixed smooth muscle and adipose tissue. There is a cuff of normal renal parenchyma in the lower aspect of the picture.
High power of angiomyolipoma with scattered thick walled vessels (central) set within stroma composed of smooth muscle (eosinophilic cells) and adipose tissue (clear rounded spaces).