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Histologic features of GRCC. (A) Tumor shows solid nests of clear cells with fine meshwork vasculatures (×100). (B) The individual cancer cells have clear cytoplasm with fine granules, low N-C ratio, wrinkled nuclei, and prominent nucleoli (×400). (C) The granules in tumor cells are stained with PAS (×400 and ×1000 in box). (D) The granules are not stained with d-PAS (×400 and ×1000 in box). GRCC, glycogen rich clear cell carcinoma; PAS, periodic acid stain.
