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Receiver operator characteristic (ROC) curves for the clinical sensitivity and specificity of (A) cytoplasmic, (B) nuclear and (C) total PTEN expression in gastric carcinoma relative to adjacent non-neoplastic tissue. The area under the curve (AUC) represents the overall accuracy (range, 0–1.0). The green line represents the accuracy achieved by chance alone (AUC=0.5).
