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Representative CD44 immunostaining in orthotopic N1S1 HCC tumor model. A Low-power (50×), B medium-power (100×), and C high power (200×) photomicrographs of N1S1 tumors (black asterisk) demonstrate rare cells staining positive for CD44 (brown) preferentially localizing at tumor margin (black arrowheads) 24 h after sham ablation
