The prognostic value of Tumor Volume Index in patients with esophageal cancer who had curative resection A single center experience.

AIM We aim to evaluate the prognostic significance of tumor volume in esophageal cancer. METHODS Patients who underwent curative resection due to esophageal cancer between the years 2015 and 2019 were included in the study. The Tumor Depth Parameter (TDP) was defined as mucosa and submucosa =1, muscularis propria =2, adventitia =3, and invasion into adjacent organs=4. The Tumor Volume Index (TVI) was defined as the major axis X the minor axis X TDP. Two groups were formed based on TVI: Group 1 (low TVI) and Group 2 (high TVI). In the groups; patients were compared in terms of demographic and clinical features, intraoperative and postoperative outcomes, characteristics of the tumor and average survival. RESULTS The patients were divided into two groups based on the cut-off value of 4,000. Group 1 (low TVI) consisted of 16 patients and Group 2 (high TVI) consisted of 28 patients. Male sex ratio was higher in Group 2 (50% vs 85%, p:0.011) Tumor diameter was observed to be larger in Group 2 (3.06 vs 5.54, p:0.000). Adenocarcinoma histologic type was more common in Group 2 (25% vs 64.3%, p:0.012). Incidence of respiratory complications was higher in Group 2 (0% vs 35.7%, p:0.024),Survival time (months) was shorter in Group 2 (36 vs 11, p:0.005). TVI's being over 4000 (HR)(95%-Confidence Interval ((Cl) 0.057 (0.011-0.311),p:0.001) was an independent risk factor to determine the rate of survival. CONCLUSION TVI can be used as a prognostic factor in patients with esophageal cancer who underwent surgical therapy. TVI is closely associated with tumor histology and postoperative outcomes. KEY WORDS Esophageal cancer, Prognosis, Postoperative complication, Surgical manangment, Survey, Tumor volume.