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Omori Y, Aoki S, Ono Y, Kokumai T, Yoshimachi S, Sato H, Kusaka A, Iseki M, Douchi D, Miura T, Maeda S, Ishida M, Mizuma M, Nakagawa K, Mizukami Y, Furukawa T, Unno M. Clonal analysis of metachronous double biliary tract cancers. J Pathol 2024; 263:113-127. [PMID: 38482714 DOI: 10.1002/path.6265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/07/2024] [Accepted: 01/22/2024] [Indexed: 04/04/2024]
Abstract
The molecular mechanisms underpinning the development of metachronous tumors in the remnant bile duct following surgical resection of primary biliary tract carcinomas (BTCs) are unknown. This study aimed to elucidate these mechanisms by evaluating the clinicopathologic features of BTCs, the alterations to 31 BTC-related genes on targeted sequencing, and the aberrant expression of p53, p16, SMAD4, ARID1A and β-catenin on immunohistochemistry. Twelve consecutive patients who underwent resection of metachronous BTCs following primary BTC resection with negative bile duct margins were enrolled. Among the 12 metachronous tumors, six exhibited anterograde growth in the lower portion and six exhibited retrograde growth in the upper portion of the biliary tree. Surgical resection of metachronous BTCs resulted in recurrence-free survival in seven, local recurrence in five, and death in two patients. Nine achieved 5-year overall survival after primary surgery. Molecular analyses revealed that recurrently altered genes were: TP53, SMAD4, CDKN2A, ELF3, ARID1A, GNAS, NF1, STK11, RNF43, KMT2D and ERBB3. Each of these was altered in at least three cases. A comparison of the molecular features between 12 paired primary and metachronous BTCs indicated that 10 (83%) metachronous tumors developed in clonal association with corresponding primary tumors either successionally or phylogenically. The remaining two (17%) developed distinctly. The successional tumors consisted of direct or evolved primary tumor clones that spread along the bile duct. The phylogenic tumors consisted of genetically unstable clones and conferred a poor prognosis. Metachronous tumors distinct from their primaries harbored fewer mutations than successional and phylogenic tumors. In conclusion, over 80% of metachronous BTCs that develop following primary BTC resection are probably molecularly associated with their primaries in either a successional or a phylogenetic manner. Comparison between the molecular features of a metachronous tumor and those of a preceding tumor may provide effective therapeutic clues for the treatment of metachronous BTC. © 2024 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Yuko Omori
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
- Institute of Biomedical Research, Sapporo Higashi Tokushukai Hospital, Sapporo, Japan
| | - Shuichi Aoki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yusuke Ono
- Institute of Biomedical Research, Sapporo Higashi Tokushukai Hospital, Sapporo, Japan
- Division of Gastroenterology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Takashi Kokumai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shingo Yoshimachi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideaki Sato
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akiko Kusaka
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masahiro Iseki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Daisuke Douchi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takayuki Miura
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shimpei Maeda
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masaharu Ishida
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masamichi Mizuma
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Nakagawa
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yusuke Mizukami
- Institute of Biomedical Research, Sapporo Higashi Tokushukai Hospital, Sapporo, Japan
- Division of Gastroenterology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Toru Furukawa
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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