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VEGF, EGFR, c-erbB2, and β-catenin expression in three PTC histological variants. VEGF expression was frequently increased in TCV (score ≥ 1, P = 0.012, first row, ×400) while no EGFR expression was detected in most FV and TCV cases (P = 0.002, second row, ×400). TCV showed reduced c-erbB2 positivity (score = 0, third row, ×400) and the characteristic paranuclear dot-like β-catenin positivity (fourth rows). FV, follicular variant; TCV, tall cell variant.
