Background : Surgical resection including major hepatectomy is the best option for curative resection of perihilar cholangiocarcinoma(PHCC). However, safety and oncologic effectiveness of major hepatectomy for PHCC in elderly patients is still controversial due to surgical complexity and concerns about poor recovery. The aim of this study is to investigate the feasibility of major hepatectomy in elderly PHCC patients.

Methods : Patients with PHCC who underwent major hepatectomy at Asan Medical Center were evaluated from 2005 to 2020. Patients were categorized into two groups: non-elderly(〈70 years old) and elderly(≥70 years old). Perioperative and long-term outcomes including overall survival and disease-free survival were analysed and compared between two groups. Additional subanalysis according to age 75 were performed for reliable results.

Results : A total of 620 patients were included: non-elderly group(n=430), elderly group(n=190). ASA score 3 or higher, hypertension, diabetes mellitus, cardiovascular comordity showed higher rates in elderly group. Operation time was shorter in elderly group(353.2±78.1 vs 334.1±73.7min, p=0.004). Median length of stay showed no significant differences. The rate of postoperative intensive care unit(ICU) stay was higher in elderly group(6.1% vs. 12.1%, p=0.022). The rate of overall complication and major complication showed no differences between two groups. However, 90-day mortality was higher in elderly group(0.9% vs 5.1%, p〈0.001). R0 resection rate showed similar results in both groups.

Conclusions : Elderly PHCC patients, 70 and older can be eligible for major hepatectomy with comparable perioperative outcomes and should not be precluded from radical treatment. Still, it is important to keep attention to sepsis-related mortality in elderly patients in our experience.