Fig. 4From: The usefulness of the total metabolic tumor volume for predicting the postoperative recurrence of thoracic esophageal squamous cell carcinomaKaplan-Meier estimates of survival functions for RFS in the pN0–1 group (a) and the combination of TMTV < 3.8 pN0, TMTV < 3.8 pN1, TMTV ≥3.8 pN0, and TMTV ≥3.8 pN1 groups in 133 thoracic ESCC patients (b). P-values were determined by the log-rank testBack to article page