Intercostal arteriograph obtained during TACE on the metastatic lesion of hepatocellular carcinoma in the right 7th rib (black arrow). Embolization was conducted by injecting a mixture of doxorubicin, Lipiodol, and Gelfoam through the right posterior intercostal artery, which courses through the lower part of the 7th rib. Microcatheter insertion was attempted for embolization, but it was difficult to progress due to the narrowness and severe tortuosity of the vessel (white arrow). Blood vessels that are considered to be the dorsal branches of the posterior intercostal artery can be seen.