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Prognostic Impact of Tumor Growth Type on 7th AJCC Staging System for Intrahepatic Cholangiocarcinoma: a Single-Center Experience of 659 Cases

Journal of Gastrointestinal Surgery volume 19, pages 1291–1304 (2015)Cite this article

Abstract

Objective

Because noticeable changes were made to the 7th American Joint Committee on Cancer (AJCC) tumor–node–metastasis (TNM) staging for intrahepatic cholangiocarcinoma (IHCC), we validated the prognostic impact of tumor staging after macroscopic curative resection of IHCC.

Methods

A cohort of 659 IHCC patients who underwent R0 (n = 539) or R1 (n = 120) resection were selected with exclusion of R2 resection (n = 111). Study patients were followed up for ≥24 months or until death with no patient lost during survival analysis.

Results

Anatomical resection was performed in 599 (90.9 %) and concurrent bile duct resection was conducted in 97 (14.7 %). Median survival periods following R0, R1, and R2 resections were 28, 12, and 3 months, respectively (p = 0.000). In the R0 resection group, the 1-, 3-, 5-, and 10-year tumor recurrence rates were 36.4 %, 57.9 %, 64.7 %, and 65.0 %, respectively, and the 1-, 3-, 5-, and 10-year patient survival rates were 73.1 %, 44.2 %, 33.0 %, and 23.1 %, respectively. Independent risk factors for tumor recurrence and patient survival were tumor growth type, tumor size > 5 cm, perineural invasion, and lymph node metastasis. According to the 7th AJCC staging system, the prognostic contrast was marginal in stage T2–4 tumors without lymph node metastasis (p > 0.8). With our redefined staging system with tumor growth types and risk factors including tumor number and perineural/lymphovascular invasion, clear prognostic contrast was achieved among T1–3 stages (p = 0.000).

Conclusion

Growth type of IHCC seems to be essential for determining tumor stage. Although the stratification of the 7th AJCC IHCC staging system seems reasonably established, refinements and further validation could improve prognostic predictability.

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Acknowledgments

None of the authors was supported financially for this study.

Conflicts of Interest

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Affiliations

  1. Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, South Korea

    Shin Hwang, Young-Joo Lee, Gi-Won Song, Kwang-Min Park, Ki-Hun Kim, Chul-Soo Ahn, Deok-Bog Moon & Sung-Gyu Lee

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  1. Shin Hwang
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Correspondence to Shin Hwang.

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Hwang, S., Lee, YJ., Song, GW. et al. Prognostic Impact of Tumor Growth Type on 7th AJCC Staging System for Intrahepatic Cholangiocarcinoma: a Single-Center Experience of 659 Cases. J Gastrointest Surg 19, 1291–1304 (2015). https://doi.org/10.1007/s11605-015-2803-6

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  • DOI: https://doi.org/10.1007/s11605-015-2803-6

Keywords

  • Intrahepatic cholangiocarcinoma
  • Resection
  • Recurrence
  • Lymphovascular invasion
  • Perineural invasion