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Figure 1a. Normal anatomy of a right IPA originating from the aorta in a 55-year-old man with a recurrent HCC in the right posterior superior hepatic lobe. (a) Arterial phase dynamic CT scan obtained after two sessions of TACE shows the right IPA (arrow) originating from the aorta. A recurrent HCC was seen in liver segment 7. (b) Selective right inferior phrenic angiogram obtained for treatment of the recurrent HCC by means of a 5-F Rösch hepatic catheter shows the normal anatomy of the right IPA, which originates from the aorta, as well as no definitive tumor staining. There was no tumor staining on a hepatic angiogram, and the viable portion of the HCC was supplied by the right 10th and 11th intercostal arteries. 1 = ascending (anterior) branch, 2 = descending (posterior) branch, 3 = inferior vena caval branch, 4 = superior adrenal branch, 5 = diaphragmatic branch.