Diagnosis of hepatic focal nodular hyperplasia by combination of unenhanced and dynamic contrast enhanced MR imaging
- VernacularTitle:平扫和动态增强MRI诊断肝脏局灶性结节增生
- Author:
Jianping LU
;
Li WANG
;
Fei WANG
- Publication Type:Journal Article
- Keywords:
Liver neoplasm;
Diagnosis, differential;
Magnetic resonance imaging
- From:
Chinese Journal of Radiology
2000;0(11):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate MR imaging findings of hepatic focal nodular hyperplasia (FNH) on unenhanced and dynamic contrast enhanced scans and evaluate their diagnostic value. Methods The unenhanced and dynamic gadolinium enhanced MR images of 22 FNHs proved by pathology were retrospectively analyzed. Results Average size of FNH lesions was 4.05 cm. The typical MR isointensity signal with surrounded hepatic parenchyma on T 1 and T 2 weighted images was seen in only 4 lesions, while atypical signal was encountered in 18 lesions. A central scar was noted in 8 lesions on unenhanced images. After gadolinium administration, 21 lesions had vigorous enhancement on arterial phase and prolonged enhancement on portal vein and delayed phase. The ring enhancement of capsule was noted in 2 lesions on portal vein and delayed phase. 18 lesions showed a central scar on dynamic contrast enhanced images. 19 lesions were correctly diagosed by using the combination of unenhanced and dynamic contrast enhanced MR imaging. Conclusion The combination of unenhanced and dynamic contrast enhanced MR imaging can fully show the pathologic characteristics of FNH and improve to differeniate ability from other malignant hypervascular tumors.
