CT-guided percutaneous ethanol injection with disposable curved needle for treatment of malignant liver neoplasms and their metastases in retroperitoneal lymph nodes

Figure 1 A tumor in the right lobe of liver (2. 2 cm × 2.0 cm). A small amount of high-density iodipin could be seen in some areas of the tumor receiving TACE.

Figure 2 When a deeply embedded tumor is difficult for a straight needle to reach the appropriate point within it, a straight trocar (21G) is used to reach the tumor side.

Figure 3 Insertion of the 25-G disposable curved needle into the tumor through the straight trocar. The tip position is ad-justed to the target by changing the direction of the curved needle. Ethanol can be injected at multiple points within the tumor by changing the direction of the curved needle.

Figure 4 Distribution of elhanol in the whole tumor.

Figure 5 A complete necrotic change of the tumor found at enhanced MRI check-up three months after the PEI.