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. 2021 Apr 15;6(3):75–82. doi: 10.22575/interventionalradiology.2020-0030

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© 2021 Japanese Society of Interventional Radiology

Interventional Radiology is an Open Access journal distributed under the Creative Commons Attribution-NonCommercial 4.0 International License. To view the details of this license, please visit (https://creativecommons.org/licenses/by-nc/4.0/).

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Fig. 8. — A 64-year-old man was referred to our hospital for investigation of an incidentally detected retroperitoneal tumor. (a) A 38-mm tumor (arrow) exists in the left psoas muscle, left external iliac artery, and vein. (b) A 23-gauge needle (arrow) is inserted into the left side of the descending colon and saline (asterisk) is injected. (c) Saline (asterisk) is used to push the descending colon to the right side. An 18-gauge semi-automatic biopsy needle (arrow) is inserted through the saline and biopsy is performed. The tumor is diagnosed as dedifferentiated liposarcoma.