Early postoperative inflammatory response by procedure types: stapler-based segmentectomy versus lobectomy.

OBJECTIVE: Perioperative C-reactive protein (CRP) levels have become a contentious topic on the surgical outcome of lung cancer, but the influence of the procedure types has not been precisely investigated. From this viewpoint, we compared two types of thoracoscopic anatomical lung resection: segmentectomy and lobectomy. METHODS: This was a retrospective study involving patients who underwent standardized anatomical lung resection at a single institute from 2014 to 2017; CRP levels were routinely measured on postoperative days 1, 3, and 5. Changes in the CRP levels from the preoperative period were calculated (ΔCRP), and factors associated with a higher ΔCRP value were analyzed. RESULTS: Among 186 patients included, 91 (48.9%) patients underwent stapler-based segmentectomy and 95 (51.1%) patients underwent lobectomy. The segmentectomy group showed significantly higher ΔCRP values on every measurement day than the lobectomy group, in spite of shorter operation time, smaller blood loss, shorter drainage periods, shorter dissection time, and limited lymph node dissection. The number of stapler cartridges for the lung parenchyma was significantly larger in the segmentectomy group. Regression analyses indicated that procedure type and smoking history were associated with a higher ΔCRP value, whereas no significant difference was indicated in the smoking history between the groups. CONCLUSION: In our cohort, stapler-based thoracoscopic segmentectomy was associated with an increase in acute inflammatory response despite favorable perioperative outcome compared to lobectomy. Local surgical stress and damage in the remaining segments might play a key role and warrants further investigation.