title: Intratumor gas--an ultrasound sign of tumour necrosis.
abstract: The ultrasound appearances of primary liver tumour in three patients are described. Changes in these appearances following devascularisation of the tumour by transcatheter embolisation are demonstrated. A possible mechanism for the change in appearances is suggested and is discussed in the light of plain radiographic and computerised tomographic findings.
mesh_terms: D000328:Adult; D006528:Carcinoma, Hepatocellular / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000628:therapy; D004621:Embolization, Therapeutic; D005260:Female; D005740:Gases; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000628:therapy; D008297:Male; D008875:Middle Aged; D009336:Necrosis / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
chemical_list: D005740:Gases