Roth D, Widelec J, Ramon F, Bellemans M
Department of Radiology, Brugmann University Hospital, ULB/VUB, Brussels, Belgium.
J Belge Radiol. 1992 Aug;75(4):321-6.
Thirteen patients with lipoma were examined at least with MRI, which revealed homogeneous and high signal lesions in both T1 and T2 WI sequences. On CT, these lesions were characterized by very negative density values. Sonography was useful to differentiate a lipoma from an old hematoma that share the same signal on MRI. Eighteen cases of biopsy proven liposarcomas were evaluated with at least two techniques. Tumor heterogeneity was the most important clue to malignancy. With CT, contrast injection was necessary because two cases out of eight appeared homogeneous on native examinations. Lobular pattern and large size are constant signs associated with liposarcoma. The correlation of imaging and histology classification was only successful with differentiated tumors. Angiography unspecifically reveals the malignancy of liposarcoma. MRI is better than CT to evaluate tumor expansion and to differentiate the mass from the surrounding tissue.
对13例脂肪瘤患者至少进行了磁共振成像（MRI）检查，结果显示在T1加权成像（T1WI）和T2加权成像（T2WI）序列中均为均匀高信号病变。在计算机断层扫描（CT）上，这些病变的特征是密度值极低。超声检查有助于区分脂肪瘤与在MRI上具有相同信号的陈旧性血肿。对18例经活检证实的脂肪肉瘤病例至少采用了两种技术进行评估。肿瘤异质性是恶性肿瘤的最重要线索。在CT检查中，需要注射造影剂，因为在平扫检查中8例中有2例表现为均匀密度。小叶状形态和大尺寸是与脂肪肉瘤相关的恒定征象。成像与组织学分类的相关性仅在分化型肿瘤中取得成功。血管造影术不能特异性地显示脂肪肉瘤的恶性程度。在评估肿瘤扩展以及区分肿块与周围组织方面，MRI优于CT。
