Abstract:
PURPOSE:To determine whether adrenal adenomas can be differentiated from metastases on fat-saturated magnetic resonance (MR) images. MATERIALS AND METHODS:Twenty-eight adrenal adenomas and 20 metastatic lesions were imaged at 1.5 T by means of fat-saturated T1- and T2-weighted and gadolinium-enhanced T1-weighted sequences. The authors evaluated visually whether structures of high signal intensity (hyperintense rim sign) could be observed in the outer margin of the adrenal masses. RESULTS:Twenty-six of 28 adrenal adenomas revealed the hyperintense rim sign on at least one kind of fat-saturated image, compared with only one of 20 metastases. The sensitivity of the hyperintense rim sign as suggestive of adrenal adenoma was 92%, specificity was 95%, and overall accuracy was 94%. CONCLUSION:The hyperintense rim sign is characteristic of adrenal adenomas. Thus, adrenal adenomas can be differentiated from metastases by means of this new imaging sign on fat-saturated MR images.
journal_name
Radiologyjournal_title
Radiologyauthors
Ichikawa T,Ohtomo K,Uchiyama G,Koizumi K,Monzawa S,Oba H,Nogata Y,Kachi K,Toyama K,Yamaguchi Mdoi
10.1148/radiology.193.1.8090900subject
Has Abstractpub_date
1994-10-01 00:00:00pages
247-50issue
1eissn
0033-8419issn
1527-1315journal_volume
193pub_type
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