Prognostic significance of dissecting the nerve plexus around the common hepatic artery in pancreatic cancer.

ABSTRACT

PURPOSE: This study aims to investigate the positivity rate of the nerve plexus (NPL) around the common hepatic artery (CHA), as well as the impact of dissecting the NPL-CHA, during surgical resection of pancreatic cancer. METHODS: Clinicopathological factors, including hematoxylin and eosin (H&E) staining and immunohistochemistry, were compared between the resectable pancreatic cancer (RPC) and borderline resectable PC (BRPC) groups. Moreover, the relationship between the NPL-CHA status and overall survival (OS) was investigated. RESULTS: In this study, 136 eligible patients were divided into the RPC (72) and BRPC (64) groups. In the RPC group, all patients were negative for H&E staining and microinvasion, whereas 13 (20%) and five patients (8%) were positive for H&E staining and microinvasion, respectively, in the BRPC group. The median OS times in the NPL-CHA-positive and -negative groups were 29.8 and 60.2 months, respectively (p = 0.088). The multivariate analysis of OS indicated an elevated initial carbohydrate antigen 19-9, lymph node (LN) metastasis, and lack of adjuvant chemotherapy (AC), which independently predicted poor outcomes. In the BRPC subgroup, contact with the CHA on preoperative computed tomography (CT) was a high-risk factor for NPL-CHA positivity. CONCLUSION: NPL-CHA positivity was only present in the BRPC group. In the absence of CT evidence of CHA contact, NPL-CHA dissection may not have survival benefits.