Abstract | PURPOSE: MATERIALS AND METHODS: This study had institutional review board approval; the requirement for informed consent was waived. Eighty-two patients (58 patients with FNH and 24 patients with HCAs) with 111 lesions were included in the study. There were 74 female patients and eight male patients (mean age, 41.9 years±13.2 [standard deviation]; age range, 11-78 years). Two readers reviewed all images in terms of signal intensity (SI) features on unenhanced, dynamic, and hepatobiliary phase images. For quantitative analysis, contrast enhancement ratio (CER), lesion-to-liver contrast (LLC), and SI ratio on dynamic and hepatobiliary phase images were calculated. RESULTS: The CER of FNH in the arterial phase (mean, 94.3%±33.2) was significantly higher than that of HCAs (mean, 59.3%±28.1) (P<.0001). During the hepatobiliary phase, the LLC of FNH showed minimally positive values (mean, 0.05±0.01) and that of HCAs demonstrated strong negative values (mean, -0.67±0.24) (P<.0001). The area under the receiver operating characteristic curve of the hepatobiliary phase SI ratio for differentiation of the two tumors was 0.97, and a sensitivity of 92% and specificity of 91% were found with a cutoff value of 0.87. Among six FNH lesions that showed atypical hypointensity during the hepatobiliary phase, four had a large central scar, one contained a substantial fat component, and one had abundant radiating fibrous septa. Three HCAs were isointense during the hepatobiliary phase owing to severe hepatic steatosis. CONCLUSION:
Gadoxetic acid-enhanced MR imaging facilitates the differentiation of FNH from HCA.
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Authors | Luigi Grazioli, Maria Pia Bondioni, Hiroki Haradome, Utaroh Motosugi, Rita Tinti, Barbara Frittoli, Sebastiana Gambarini, Francesco Donato, Stefano Colagrande |
Journal | Radiology
(Radiology)
Vol. 262
Issue 2
Pg. 520-9
(Feb 2012)
ISSN: 1527-1315 [Electronic] United States |
PMID | 22282184
(Publication Type: Journal Article)
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Copyright | © RSNA, 2012 |
Chemical References |
- Contrast Media
- gadolinium ethoxybenzyl DTPA
- Gadolinium DTPA
|
Topics |
- Adenoma, Liver Cell
(diagnosis)
- Adolescent
- Adult
- Aged
- Child
- Contrast Media
- Diagnosis, Differential
- Female
- Focal Nodular Hyperplasia
(diagnosis)
- Gadolinium DTPA
- Humans
- Image Enhancement
(methods)
- Liver Neoplasms
(diagnosis)
- Male
- Middle Aged
- Reproducibility of Results
- Sensitivity and Specificity
- Young Adult
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