TAE, Liver cancer, Echogenic spot, Air density, Gas formation
Transcatheter arterial embolization (TAE) using geratin sponge was performed in 8 patients with hepatocellular carcinoma, and echogenic spots recorded on ultrasonograph during 24 hrs. after TAE were investigated in comparison with air density on X-ray CT. As a result, two kinds of echogenic spots were observed. One was an echogram of gelatin sponge itself which was observed immediately after TAE in both the tumor and non-tumor areas, and such spots mostly disappeared 24 hrs. later. The other echogenic spots, multiplying in the tumor from 30 min. after TAE, were echoes of gas originating in the tumor.