2024年6月30日 · Focal nodular hyperplasia (FNH) is a regenerative mass lesion of the liver and the second most common benign liver lesion (the most common is a hemangioma). Many focal nodular hyperplasias have characteristic radiographic features on multimodality imaging, but some lesions may be atypical in appearance. They are typically asymptomatic lesions ...

2022年6月10日 · Focal nodular hyperplasia (FNH) is a benign lesion occurring in a background of normal liver. FNH is seen most commonly in young women and can often be accurately diagnosed at imaging, including CT, MRI, or contrast-enhanced US.

Learn about Focal Nodular Hyperplasia (FNH) through MRI imaging, understand its distinctive MRI image appearance, and discover guidelines on how to effectively report FNH findings.

MRI appearance of FNH: (a) T1-weighted in-phase image; (b) T1 out-of-phase image; (c) In a T2-weighted image, the FNH nodule (yellow arrow) appears isointense to the surrounding liver parenchyma; (d) during the arterial phase of gadolinium-enhanced imaging, the entire nodule (except the central scar) displays intense, homogeneous enhancement ...

2012年11月23日 · The six imaging criteria for typical focal nodular hyperplasia on MRI were iso- or hypointensity on T1-weighted sequences and isointensity or slight hyperintensity on T2-weighted sequences; homogeneous signal intensity; presence of a central hyperintense area on T2-weighted sequences; marked lesion enhancement at the arterial phase after bolus ...

2018年5月1日 · fnh可能在mri上表现出一种以上的非典型特征并导致诊断困难。 在非肝硬化肝脏中表现近似其他原发性肝脏病变，包括肝细胞癌（HCC）。 在欧洲和北美，非肝硬化肝脏中可能会出现很大比例（高达40％）的HCC，有时不易于与非典型FNH相鉴别。

Focal nodular hyperplasia (FNH) is a benign 'tumor-like' mass of the liver. It has characteristic imaging features on contrasted-enhanced cross-sectional imaging. FNH is most frequently identified in young to middle-aged adults, with a strong female predilection. On CT and MRI the imaging features are classical, which are:

Focal nodular hyperplasia is a benign tumor of the liver that is often found incidentally with imaging. The purpose of this review is to discuss the pathophysiology, rare complications that can occur due to these lesions, and management options.

MRI has a specificity approaching 100% for diagnosing FNH when the pathognomonic morphological features of; arterial enhancing, T2 isointense to slightly hyperintense, T1 isointense to slightly hypointense and a T2 hyperintense central scar which has delayed enhancement are present (Figure 1).

Magnetic resonance (MR) imaging has higher sensitivity and specificity for FNH than does ultrasonography or computed tomography. Typically, FNH is iso- or hypointense on T1-weighted images, is slightly hyper- or isointense on T2-weighted images, and has a hyperintense central scar on T2-weighted images.