Long-term outcomes following hepatectomy in patients with lean non-alcoholic fatty liver disease-associated hepatocellular carcinoma versus overweight and obese counterparts: A multicenter analysis

Wei Zhang, Min Yu Li, Zi Qiang Li, Yong Kang Diao, Xing Kai Liu, Hong Wei Guo, Xiao Chang Wu, Hong Wang, Si Yuan Wang, Ya Hao Zhou, Jun Lu, Kong Ying Lin, Wei Min Gu, Ting Hao Chen, Jie Li, Ying Jian Liang, Lan Qing Yao, Ming Da Wang, Chao Li, Dong Xu YinTimothy M. Pawlik, Wan Yee Lau, Feng Shen, Zhong Chen, Tian Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Background & aims: With the rising prevalence of non-alcoholic fatty liver disease (NAFLD) as a significant etiology for hepatocellular carcinoma (HCC), lean NAFLD-HCC has emerged as a specific distinct subtype. This study sought to investigate long-term outcomes following curative-intent hepatectomy for early-stage NAFLD-HCC among lean patients compared with overweight and obese individuals. Methods: A multicenter retrospective analysis was used to assess early-stage NAFLD-HCC patients undergoing curative-intent hepatectomy between 2009 and 2022. Patients were stratified by preoperative body mass index (BMI) into the lean (<23.0 kg/m2), overweight (23.0–27.4 kg/m2) and obese (≥27.5 kg/m2) groups. Study endpoints were overall survival (OS) and recurrence-free survival (RFS), which were compared among groups. Results: Among 309 patients with NAFLD-HCC, 66 (21.3 %), 176 (57.0 %), and 67 (21.7 %) were lean, overweight, and obese, respectively. The three groups were similar relative to most liver, tumor, and surgery-related variables. Compared with overweight patients (71.3 % and 55.6 %), the lean individuals had a worse 5-year OS and RFS (55.4 % and 35.1 %, P = 0.017 and 0.002, respectively), which were comparable to obese patients (48.5 % and 38.2 %, P = 0.939 and 0.442, respectively). After adjustment for confounding factors, multivariable Cox-regression analysis identified that lean bodyweight was independently associated with decreased OS (hazard ratio: 1.69; 95 % confidence interval: 1.06–2.71; P = 0.029) and RFS (hazard ratio: 1.72; 95 % confidence interval: 1.17–2.52; P = 0.006) following curative-intent hepatectomy for early-stage NAFLD-HCC. Conclusions: Compared with overweight patients, individuals with lean NAFLD-HCC had inferior long-term oncological survival after hepatectomy for early-stage NAFLD-HCC. These data highlight the need for examination of the distinct carcinogenic pathways of lean NAFLD-HCC and its potential consequences in HCC recurrence.

Original languageEnglish
JournalAsian Journal of Surgery
DOIs
StateAccepted/In press - 2024
Externally publishedYes

Keywords

  • Hepatectomy
  • Hepatocellular carcinoma
  • Lean
  • Metabolic dysfunction-associated fatty liver disease
  • Non-alcoholic fatty liver disease
  • Recurrence
  • Survival

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