Abstract
Objectives
To determine whether baseline multiparametric MR imaging can predict overall survival (OS) and hepatic progression-free survival (HPFS) in patients with neuroendocrine liver metastases (NELMs) treated with transarterial chemoembolization (TACE).
Methods
This retrospective study included 84 NELMs patients treated with TACE. Tumor volume and volumetric measurements of arterial enhancement (AE), venous enhancement (VE), and apparent diffusion coefficient (ADC) were performed on baseline MR imaging. A maximum of one, two, and five index lesions were selected in each patient. OS was the primary endpoint and HPFS was the secondary endpoint. Prognostic values of volumetric multiparametric MR parameters for predicting OS and HPFS considering a maximum of one, two, and five index lesions were assessed.
Results
Prognostic values of volumetric multiparametric MR parameters for predicting OS and HPFS were similar regardless of the maximum number of index lesions. Multivariate survival analysis showed that baseline dominant tumor volume ≥ 73 cm3, volumetric mean AE ≥ 45%, and mean VE ≥ 73% were independent prognostic factors for OS (HR 2.73; 95% CI 1.45, 5.15; HR 0.32; 95% CI 0.17, 0.63; HR 0.35; 95% CI 0.17, 0.72, respectively) and HPFS (HR 2.30, 95% CI 1.38, 3.84; HR 0.46, 95% CI 0.25, 0.84; HR 0.36, 95% CI 0.19, 0.57, respectively). OS and HPFS were similar in patients with low and high volumetric mean ADC.
Conclusion
Volumetric enhancement values and tumor volume of the dominant lesion on baseline MR imaging may act as prognostic factors for OS and HPFS in NELMs patients treated with TACE.
Key Points
• High volumetric mean AE and VE, and low tumor volume of the dominant lesion on baseline MR imaging were associated with favorable OS and HPFS in NELMs patients treated with TACE.
• Evaluation of multiple lesions does not provide additional information as compared to single lesion evaluation.
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Abbreviations
- ADC:
-
Apparent diffusion coefficient
- AE:
-
Arterial enhancement
- DWI:
-
Diffusion-weighted imaging
- EASL:
-
European Association for the Study of the Liver
- HPFS:
-
Hepatic progression-free survival
- mRECIST:
-
Modified Response Evaluation Criteria in Solid Tumors
- NELMs:
-
Neuroendocrine liver metastases
- OS:
-
Overall survival
- PFS:
-
Progression-free survival
- TACE:
-
Transarterial chemoembolization
- VE:
-
Venous enhancement
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The scientific guarantor of this publication is Ihab R Kamel.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
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Written informed consent was waived by the Institutional Review Board.
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Study subjects or cohorts overlap
Some study subjects or cohorts have been previously reported in a previously published paper (Gowdra HV et al Neuroendocrine liver metastasis treated by using intra-arterial therapy: volumetric functional imaging biomarkers of early tumor response and survival. Radiology 2013; 266:502–513). We have reported on 55 out of 84 patients included in the current study. However, the prior report focused on the prognostic value of pre- and post-TACE changes in volumetric multiparametric MR imaging of the dominant lesion for predicting overall survival. The current study included a larger sample size and evaluated whether baseline volumetric MR imaging only can predict overall survival and hepatic progression-free survival. Also, the prognostic values of baseline volumetric MR metrics using three different numbers of index lesions (one, two, and five) were compared in the current study.
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• retrospective
• diagnostic or prognostic study
• performed at one institution
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Luo, Y., Pandey, A., Ghasabeh, M.A. et al. Prognostic value of baseline volumetric multiparametric MR imaging in neuroendocrine liver metastases treated with transarterial chemoembolization. Eur Radiol 29, 5160–5171 (2019). https://doi.org/10.1007/s00330-019-06100-3
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DOI: https://doi.org/10.1007/s00330-019-06100-3