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Radiology, Vol 195, 753-756, Copyright © 1995 by Radiological Society of North America

ARTICLES

Early hepatocellular carcinoma that develops within macroregenerative nodules: growth rate depicted at serial MR imaging

AG Sadek, DG Mitchell, ES Siegelman, EK Outwater, T Matteucci and HW Hann
Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA.

PURPOSE: To assess by means of magnetic resonance (MR) imaging the growth rate of early hepatocellular carcinoma (HCC) that develops within macroregenerative nodules. MATERIALS AND METHODS: Serial MR imaging was performed in five patients with six macroregenerative nodules that demonstrated a "nodule-within-nodule" pattern (small intranodular focus). The diameter and volume increases of the internal foci at different time intervals were estimated. Average doubling time (DT) was then calculated. RESULTS: The tiny foci within macroregenerative nodules exhibited rapid growth, with average DTs of 29 weeks for diameter and 9.5 weeks for volume. HCC was proved histopathologically in all five patients. CONCLUSION: HCC, which manifests initially as a small focus within a macroregenerative nodule, has the potential for rapid growth. This growth rate should be considered when plans are formulated for follow-up and/or treatment.




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