Solitary necrotic nodule of the liver: MR findings in 33 pathologically proved lesions

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• 作者：Li Geng^a ; ^{gengliehbh@sina.com} ; Chuan Lin^b ; ^{linchuan68@sohu.com} ; Bin Huang^c ; ^{ambulancehuang@163.com} ; Xing-An Long^c ; ^{longxadfgd@126.com} ; Bing-Hua Dai^a ; ^{yehaiwen@hotmail.com} ; Wen-Ming Cong^d ; ^{congwmsmmu@sina.com} ; Jia-Mei Yang^a ; ^{jmyang@smmu.edu.cn}
• 关键词：Solitary necrotic nodule of the liver ; Magnetic resonance imaging ; Liver neoplasm ; Liver disease
• 刊名：European Journal of Radiology
• 出版年：2012
• 期刊代码：93_0720048x
• 类别：med
• 出版时间：April, 2012
• 卷：81
• 期：4
• 页码：623-629
• 文件大小：1793 K

摘要

Purpose

To determine characteristic magnetic resonance (MR) imaging features of solitary necrotic nodule of the liver.

Materials and methods

MR images features of thirty-two patients (17 men, 15 women; mean age, 43 years; range, 24-76 years) with pathologically proved solitary necrotic nodule of the liver were retrospectively analyzed for number, size, signal intensity features and enhancement patterns.

Results

A total of 33 lesions were identified. The mean diameter was 2.3 cm (range 1.0-4.5 cm). Thirty lesions (90.9%) were 1.0-3.0 cm in diameter and only 3 lesions (9.1%) were larger than 3.0 cm. On T1-weighted images, solitary necrotic nodule of the liver appeared hypointense in 31 lesions (93.9%) and isointense in 2 lesions (6.1%). On T2-weighted images, 12 (36.4%) lesions were hyperintense, 15 (45.4%) were isointense or invisible and 6 (18.2%) were hypointense. After injection of gadopentetate dimeglumine, all lesions were hypointense and none of them showed enhancement.

Conclusion

Solitary necrotic nodule of the liver is usually small with the size not exceed 3.0 cm in diameter. Absence of enhancement on all dynamic phase after gadopentetate dimeglumine administration may be most characteristic feature of solitary necrotic nodule of the liver on MR images, which may help discriminate this entity from metastatic liver tumors and intrahepatic cholangiocarcinoma.