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Repeated Bland-TAE Using Small Microspheres Injected via an Implantable Port–Catheter System for Liver Metastases: An Initial Experience

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Abstract

Purpose

The purpose of this pilot study was to assess the effectiveness of repeated bland-TAE using small-size microspheres for liver metastases. To date, there have been no publications as to whether bland-TAE could be effective for nonhypervascular liver tumors.

Methods

Bland-TAE with 100-μm, calibrated microspheres was performed in two chemoresistant patients: one with colorectal metastases and the other with gastric metastases. Both patients had multiple tumors in the entire liver. An implantable port–catheter system was placed in the hepatic artery to conduct repeated embolizations, thereby achieving enough efficacies. Microspheres were injected via the port until the disappearance of the tumor stains. Angiographies via the port were conducted 1, 3, 7, and 14 days after bland-TAE to evaluate the patency of the hepatic artery.

Results

The hepatic artery started to recanalize 1 day after TAE and tumor stains appeared again during the 14 days. In both patients, bland-TAE was repeated four times in intervals of 14–21 days. The enhanced CTs showed necrotic changes and the decrease in size of the tumors. The serum CEA level decreased from 2,989 to 70 ng/ml and from 174 to 48 ng/ml, respectively. Bilomas and a liver abscess developed as complications.

Conclusions

Repeated bland-TAE using 100-μm microspheres injected via an implantable port–catheter system could be effective for liver metastases, although the caution of biliary injury is needed.

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Acknowledgments

The authors acknowledge the excellent advice of Ms. Marian Pahud (Valkenburg, The Netherlands) in submitting this article. This research was partially supported by Grant-in-Aid for Scientific Research (C), 24591819, 2012.

Conflict of interest

There was no conflict of interest for any of the authors.

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Correspondence to Toshihiro Tanaka.

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Tanaka, T., Nishiofuku, H., Maeda, S. et al. Repeated Bland-TAE Using Small Microspheres Injected via an Implantable Port–Catheter System for Liver Metastases: An Initial Experience. Cardiovasc Intervent Radiol 37, 493–497 (2014). https://doi.org/10.1007/s00270-013-0691-2

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  • DOI: https://doi.org/10.1007/s00270-013-0691-2

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