Abstract
Background
Brain metastasis (BM) in gastric cancer (GC) is underestimated, and human epidermal growth factor receptor 2 (HER2) overexpression is a durable poor prognostic factor. We explored the relationship between the two and made a survival analysis.
Methods
HER2 expression and BM status were collected from GC patients who were diagnosed between December 2009 and May 2021. We collected GC patients diagnosed between 2010 and 2016 from the SEER database. The primary endpoint was survival from the diagnosis of BM. Multivariable logistic regression was used to determine potential risk factors of BM at diagnosis in SEER database. Survival analysis was performed using the Kaplan–Meier method.
Result
There were 513 HER2-positive GC patients, including 16 (3.1%) with BM. Among 38 brain metastasis GC patients we collected, 16 (42.1%) patients were HER2 positive. We collected 34,199 GC patients from the SEER database and there were 260 (0.76%) patients with BM at diagnosis. GC patients that are male, white, of younger age, with primary lesions located in the proximal stomach or with distant lymph nodes, liver, bone, or lung metastasis are more likely to develop BM. The median overall survival time from diagnosis of BM was 12.73 months, and the survival time from brain metastasis of HER2-positive patients was numerically shorter, though the difference was not significant (5.30 months vs.16.13 months, P = 0.28.)
Conclusion
The incidence of BM in patients with HER2-positive gastric cancer is 4.08 times higher than that in general patients. The median overall survival time from BM is shorter for HER2-positive patients.
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Data availability
The data that support the findings of this study are available from the corresponding author, QMZ and YDJ, upon reasonable request.
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Acknowledgements
We thank all the enrolled patients and their families. Role of funder statement The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and the decision to submit the manuscript for publication.
Funding
This work was supported by grants from the National Natural Science Foundation of China (82073377,81772587 to MZ.Q., 82172748 to DJ.Y.), Natural Science Foundation of Guangdong (2021A1515012439 to MZ.Q.).
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QMZ, YDJ: design and conduct of the study. LMY, GWL, YJ: collection, management, analysis, and interpretation of the data. SYT, LSX and YLQ: investigation, methodology. LMY and GWL: resource, writing the original draft. All the authors reviewed and approved the manuscript. All the authors decided to submit the manuscript for publication.
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This study was performed in accordance with the Declaration of Helsinki protocols and was approved by the Ethics Committee from Sun Yat-sen University Cancer Center with accession N.O.: B2022-633-01. All authors had access to the study data and reviewed and approved the final manuscript.
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Miao-Zhen Qiu and Da-Jun Yang had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
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Lai, MY., Guan, WL., Yang, J. et al. The relationship between brain metastasis and HER2 expression status in gastric cancer. Clin Transl Oncol 26, 765–773 (2024). https://doi.org/10.1007/s12094-023-03306-2
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DOI: https://doi.org/10.1007/s12094-023-03306-2