Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Diffusion-Weighted Magnetic Resonance Imaging in Hepatocellular Carcinoma as a Predictor of a Response to Cisplatin-Based Hepatic Arterial Infusion Chemotherapy

Version 1 : Received: 7 August 2020 / Approved: 9 August 2020 / Online: 9 August 2020 (15:34:00 CEST)

How to cite: Sung, P.S.; Choi, M.H.; Yang, H.; Lee, S.K.; Chun, H.J.; Jang, J.W.; Choi, J.Y.; Yoon, S.K.; Choi, J.; Lee, Y.J.; Bae, S.H. Diffusion-Weighted Magnetic Resonance Imaging in Hepatocellular Carcinoma as a Predictor of a Response to Cisplatin-Based Hepatic Arterial Infusion Chemotherapy. Preprints 2020, 2020080218 (doi: 10.20944/preprints202008.0218.v1). Sung, P.S.; Choi, M.H.; Yang, H.; Lee, S.K.; Chun, H.J.; Jang, J.W.; Choi, J.Y.; Yoon, S.K.; Choi, J.; Lee, Y.J.; Bae, S.H. Diffusion-Weighted Magnetic Resonance Imaging in Hepatocellular Carcinoma as a Predictor of a Response to Cisplatin-Based Hepatic Arterial Infusion Chemotherapy. Preprints 2020, 2020080218 (doi: 10.20944/preprints202008.0218.v1).

Abstract

This study aimed to identify the utility of diffusion-weighted magnetic resonance (MR) imaging with an apparent diffusion coefficient (ADC) map as a predictor of the intrahepatic response of hepatocellular carcinoma (HCC) to cisplatin-based hepatic arterial infusion chemotherapy (HAIC). We retrospectively evaluated 113 consecutive patients with HCC who underwent gadoxetic acid-enhanced and diffusion-weighted MR imaging. The appropriate cutoff for the tumor-to-liver ADC ratio was determined to be 0.741. Of the 113 patients, 51 (45%) presented with a tumor-to-liver ADC ratio < 0.741. Evaluation of the intrahepatic treatment response after 2-3 cycles of HAIC in these 51 patients revealed that 20 patients (39%) experienced an objective response to HAIC. On the other hand, only 10 of the 62 patients with a tumor-to-liver ADC ratio ≥ 0.741 (16%) experienced an objective response. Thus, the objective response rate was significantly higher in patients with a tumor-to-liver ADC ratio < 0.741 than in those with a tumor-to-liver ADC ratio ≥ 0.741 (P = 0.006). Multivariate logistic regression analysis using parameters including perfusion alteration, percentage of a non-enhancing portion, and tumor-to-liver ADC ratio revealed that a tumor-to-liver ADC ratio < 0.741 (odds ratio 3.03; P = 0.015) is the sole predictor of an objective response to HAIC. Overall survival rates were significantly higher in patients with objective responses to HAIC than in those without objective responses (P = 0.001 by log-rank test). In conclusion, patients with unresectable HCC with a tumor-to-liver ADC ratio < 0.741 showed a favorable intrahepatic response to HAIC. Therefore, diffusion-weighted MR imaging can play a critical role as a predictor of response to cisplatin-based HAIC in unresectable HCC.

Subject Areas

hepatocellular carcinoma; diffusion-weighted imaging; magnetic resonance; hepatic arterial infusion chemotherapy

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