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Kwon W, Heo JS, Han IW, Kang CM, Hwang HK, Kim SC, Park SJ, Yoon YS, Kim YH, Lim CS, Lee SY, Park T, Takami H, Watanabe N, Shimizu Y, Okuno M, Yamaue H, Kawai M, Seiko H, Nagakawa Y, Osakabe H, Sugiura T, Toyama H, Ohtsuka M, Unno M, Endo I, Kitago M, Jang JY. Features of T1 pancreatic cancer and validation of the eighth edition AJCC staging system definition using a Korean-Japanese joint cohort and the SEER database. J Hepatobiliary Pancreat Sci 2023; 30:1129-1140. [PMID: 36734142 DOI: 10.1002/jhbp.1316] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/23/2022] [Accepted: 01/20/2023] [Indexed: 02/04/2023]
Abstract
BACKGROUND/PURPOSE Little is known about the features of T1 pancreatic ductal adenocarcinoma (PDAC) and its definition in the eighth edition of the American Joint Committee on Cancer (AJCC) staging system needs validation. The aims were to analyze the clinicopathologic features of T1 PDAC and investigate the validity of its definition. METHOD Data from 1506 patients with confirmed T1 PDAC between 2000 and 2019 were collected and analyzed. The results were validated using 3092 T1 PDAC patients from the Surveillance, Epidemiology, and End Results (SEER) database. RESULTS The median survival duration of patients was 50 months, and the 5-year survival rate was 45.1%. R0 resection was unachievable in 10.0% of patients, the nodal metastasis rate was 40.0%, and recurrence occurred in 55.2%. The current T1 subcategorization was not feasible for PDAC, tumors with extrapancreatic extension (72.8%) had worse outcomes than those without extrapancreatic extension (median survival 107 vs. 39 months, p < .001). Extrapancreatic extension was an independent prognostic factor whereas the current T1 subcategorization was not. The results of this study were reproducible with data from the SEER database. CONCLUSION Despite its small size, T1 PDAC displayed aggressive behavior warranting active local and systemic treatment. The subcategorization by the eighth edition of the AJCC staging system was not adequate for PDAC, and better subcategorization methods need to be explored. In addition, the role of extrapancreatic extension in the staging system should be reconsidered.
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Affiliation(s)
- Wooil Kwon
- Department of Surgery, College of Medicine, Seoul National University, Seoul, South Korea
| | - Jin Seok Heo
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - In Woong Han
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Chang Moo Kang
- Department of Hepatobiliary and Pancreatic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Ho Kyoung Hwang
- Department of Hepatobiliary and Pancreatic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Song Cheol Kim
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
| | - Sang-Jae Park
- Center for Liver and Pancreatobiliary Cancer, National Cancer Center, Goyang, South Korea
| | - Yoo-Seok Yoon
- Department of Surgery, Seoul National University Bundang Hospital, Sungnam, South Korea
| | - Yong Hoon Kim
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Keimyung University Dongsan Hospital, Daegu, South Korea
| | - Chang-Sup Lim
- Department of Surgery, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, South Korea
| | - Seung Yeoun Lee
- Department of Mathematics and Statistics, Sejong University College of Natural Sciences, Seoul, South Korea
| | - Taesung Park
- Department of Statistics and Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, South Korea
| | - Hideki Takami
- Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nobuyuki Watanabe
- Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasuhiro Shimizu
- Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Nagoya, Japan
| | - Masataka Okuno
- Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Nagoya, Japan
| | - Hiroki Yamaue
- Second Department of Surgery, Wakayama Medical University, Wakayama, Japan
| | - Manabu Kawai
- Second Department of Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hirono Seiko
- Second Department of Surgery, Wakayama Medical University, Wakayama, Japan
| | - Yuichi Nagakawa
- Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, Tokyo, Japan
| | - Hiroaki Osakabe
- Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, Tokyo, Japan
| | - Teiichi Sugiura
- Division of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center, Japan, Shizuoka, Japan
| | - Hirochika Toyama
- Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Masayuki Ohtsuka
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Itaru Endo
- Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Minoru Kitago
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Jin-Young Jang
- Department of Surgery, College of Medicine, Seoul National University, Seoul, South Korea
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