Abstract
Preoperative selection of suitable patients for liver resection is dependent on the quality of radiological imaging. Computed tomography (CT) identifies approximately 70 per cent of lesions. Computed tomographic arterial portography (CTAP) during contrast enhancement of the liver via the portal vein may be superior to conventional CT. Preoperative CTAP was evaluated in 60 patients with hepatic neoplasm (48 having colorectal metastases) who subsequently underwent laparotomy. The preoperative images were compared with intraoperative palpation, intraoperative ultrasonography and histology of the resected liver. Fifty-six patients (93 per cent) underwent partial hepatectomy. The detection rate sensitivity for CTAP was 110 of 116 lesions in the 56 patients (95 per cent) and for intraoperative ultrasonography was 114 of 116 (98 per cent). CTAP correctly identified all lesions found at histology in 50 of 56 (89 per cent) resected specimens. At laparotomy four of 60 patients (7 per cent) were inoperable; two of these had been predicted to be so by this technique. CTAP correctly identifies and locates the majority of hepatic tumours, particularly metastases, and is the procedure of choice for selection of suitable candidates for partial hepatectomy.
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