PAROSTEAL LIPOMA WITH HYPEROSTOSIS - REPORT OF 2 PATHOLOGICALLY PROVEN CASES EVALUATED BY MAGNETIC-RESONANCE-IMAGING

The authors describe two cases of parosteal lipoma, an infrequent beni gn tumour, associated with hyperostosis. The first patient presented w ith a mass in the posterior neck, the other with one in the proximal f orearm. Radiologic diagnosis was facilitated by magnetic resonance ima ging (MRI). The MRI images showed the characteristic features of a par osteal lipoma, as well as hyperostotic areas that remained of low sign al intensity in both T1-weighted and T2-weighted sequences. MRI is bot h sensitive and specific for diagnosing these lesions and provides exc ellent depiction of the anatomic features before surgery.