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. 2014 Apr 10;55(4):239–244. doi: 10.4111/kju.2014.55.4.239

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© The Korean Urological Association, 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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FIG. 1 — Chromophobe tumor grade (CTG) system with hematoxylin and eosin staining (A, ×1,500), classic CTG 1 ChRCC with abundant clear cytoplasm and prominent cell membranes (B, ×1,500), CTG 2 ChRCC characterized by a higher nuclear to cytoplasmic ratio compared to CTG 1 (C, ×3,000), at higher magnification CTG 2, ChRCC has a crowded cellular appearance but does not show the spindling or degree of diffuse anaplasia of CTG 3 (D, ×600). Grade 3 ChRCC with sarcomatoid differentiation characterized by an associated malignant spindle cell proliferation. ChRCC, chromophobe subtype of renal cell carcinoma.