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Nomogram for predicting the probability of distant metastasis. Age: 1, >60; 2, ≤60. Primary site: 1, antrum/pylorus; 2, body; 3, cardia; 4, fundus; 5, lesser curvature; 6, greater curvature; 7, overlapping/not otherwise specified. Grade: 1, well/moderate; 2, poorly/undifferentiated. Tumor size: 1, ≤2 cm; 2, ≤3 cm; 3, ≤5 cm; 4, >5 cm; 5, unknown/diffuse. Depth: 1, T1a; 2, T1b
