Maximum SUV of primary tumor related to curative or non-curative operation. A: Box plot of maximum SUV of primary tumor in patients with curative or non-curative surgery; the mean values were significantly different between the two groups in an independent t-test (p < 0.001). B: Receiver operator characteristics (ROC) curve of maximum SUV of primary tumor for predicting non-curative operation. The area under the curve was 0.730 (p < 0.001, 0.629 <95% C.I. <0.831).