(b) Contrast-enhanced MDCT in the venous phase shows typical hypovascular colorectal metastases, Value of diffusion-weighted MRI for detection of small metastases. (a) T2-weighted TSE shows a large lobulated lesion of very high signal intensity. The delayed phase imaging (e.g., at 23 min) can occasionally help to detect a lesion that may be missed [51]. Limited detection of small (10 mm) colorectal liver metastasis at preoperative CT in patients undergoing liver resection. To achieve good arterial phase imaging, a relatively high contrast medium injection rate of 45 mL/s is recommended [5]. Radiology. ISSN 2045-2322 (online). The impact of primary tumor location on long-term survival in patients undergoing hepatic resection for metastatic colon cancer. is responsible for the analysis and interpretation of data for the work, material support, drafting of the manuscript, final approval of the version to be published and is accountable for all aspects of the work. Of the 389 patients who underwent MRI, 60 patients with indeterminate or equivocal nodules detected by gadoxetic acid-enhanced MRI between January 2008 and October 2018 were included in the present study. PubMed Focal nodular hyperplasia (FNH) is a benign lesion that can cause confusion when incidentally detected during abdominal imaging. Liver imaging. You may be trying to access this site from a secured browser on the server. The approach to characterizing a focal liver lesion seen on CT begins with determining its density. If tumors grow large, they may cause symptoms and need to be removed. Bile duct hamartomas are congenital malformations of the ductal plate without connections to the bile ducts. The reader should learn how to optimize CT and MR imaging in his/her own practice, understand how to apply and interpret CT and MR imaging for the management of focal liver lesions, and appreciate the expanding role of liver-specific MR contrast agents for lesion characterization. Overall survival by pretreatment carbohydrate antigen (CA) 19-9 level (A) and resectability (B). Referensi Robbins Cotran Pathologic Basis of Disease 9E - Scribd Patients whose nodules were ablated (10%) were excluded from this analysis of diagnostic accuracy. However, for each of these findings, there is only ~6080% sensitivity, and benign lesions show these findings in 1665% of cases, depending on finding, contrast agent used, and series reported [60, 61]. Any metastatic nodules identified on intraoperative liver ultrasound (IOUS) were either resected or ablated. Note that some of the lesions show a laminated appearance (arrows). This work is supported by Grant No. MR demonstration of edema adjacent to a liver metastasis: pathologic correlation. Transient focal enhancement of liver parenchyma during arterial phase, also termed transient hepatic attenuation differences (THAD), can lead to a false diagnosis of HCC. Liver lesions are abnormal growths of liver cells that can be cancerous or noncancerous.
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