FIGURE 4 Pathology of succinate dehydrogenase-deficient renal cell carcinoma. (A) The gross specimen showed that the cystic-solid mass was grayish white and the solid component of the mass was papillary. (B) Hematoxylin-eosin staining showed the cells of the mass with abundant vessels presented in a nest or duct shape, the nucleus was enlarged and oval as well as the cytoplasm was eosinophilic and transparent.