Contrast-enhanced MR imaging of hepatic lesions treated with percutaneous ethanol ablation therapy.

Abstract:

PURPOSE:Magnetic resonance (MR) images were correlated with results of fine-needle aspiration (FNA) to determine the role of MR imaging in evaluating hepatic neoplasms treated with percutaneous ethanol ablation therapy (PEAT). MATERIALS AND METHODS:Contrast material-enhanced and unenhanced MR images were obtained in 11 patients with hepatic neoplasms before PEAT (13 studies) and at intervals after PEAT (25 studies). FNA was performed at each follow-up visit. RESULTS:After PEAT, the MR appearance of the lesions was extremely variable. Also, the signal characteristics of most lesions did not change significantly with any sequence over time. Of eight lesions that demonstrated contrast enhancement before therapy, four demonstrated persistent enhancement and four showed loss of enhancement. Six of these lesions had no viable tumor at FNA. T2-weighted sequences most often showed mixed signal intensity regardless of T2-weighted imaging appearance before therapy. CONCLUSION:The MR appearance of PEAT-treated hepatic lesions is not a reliable indicator of residual or recurrent tumor.

journal_name

Radiology

journal_title

Radiology

authors

Nagel HS,Bernardino ME

doi

10.1148/radiology.189.1.7690490

subject

Has Abstract

pub_date

1993-10-01 00:00:00

pages

265-70

issue

1

eissn

0033-8419

issn

1527-1315

journal_volume

189

pub_type

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