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A tumor with mature DR (2). Desmoplastic stroma with relatively abundant lymphocyte infiltration is developing at the leading edge of the tumor. Neither myxoid stroma nor keloid-like collagen bundles are observed, and the DR pattern is classified as the mature category. (B; ×4 objective) and (C; ×10 objective) are magnifications of the area of the desmoplastic front as indicated by the arrow in (A; whole slide image). Insert in (C), ×20 objective. All, H&E staining.
