The value of fat-suppressed T2 or STIR sequences in distinguishing lipoma from well-differentiated liposarcoma
The value of fat-suppressed T2 or STIR sequences in distinguishing lipoma from well-differentiated liposarcoma
复制标题
脂肪抑制T2或STIR序列在区分脂肪瘤和高分化脂肪肉瘤中的价值
DOI：
10.1007/s00330-002-1463-6
复制
发表时间：
2003
影响因子：
5.9
通讯作者：
Manuel Navarro
中科院分区：
文献类型：
--
作者：
Joaquín Galant;Luis Martí;F. Sáez;Rafaela Soler;R. Alcalá;Manuel Navarro
本研究的目的是评价脂肪抑制T2加权（FS-T2）成像或短tau反转恢复（STIR）成像在鉴别高分化脂肪肉瘤中脂肪瘤和脂肪瘤样亚型中的诊断价值。我们对60例脂肪瘤和32例脂肪瘤样高分化脂肪肉瘤进行了自旋回波T1加权和STIR或脂肪抑制T2加权序列，这些脂肪瘤和脂肪瘤样高分化脂肪肉瘤均经组织学证实，在T1加权图像上寻找厚的间隔或结节，在FS-T2/STIR序列上寻找线性、结节状或无定形高信号。14例脂肪瘤（23.3%）在T1序列上显示为厚间隔和/或结节，而在FS-T2或STIR序列上仅7例（11.7%）显示为高信号结节和/或间隔。所有分化良好的脂肪肉瘤在FS-T2或STIR序列上均包含这些征象。在FS-T2/STIR序列上脂肪瘤为主的肿瘤中出现高信号分隔或结节有助于鉴别恶性肿瘤和脂肪瘤。以高信号结节和/或分隔为恶性诊断标准，特异性为76.6%，敏感性为100%。高分化脂肪肉瘤的过度诊断可能是由于脂肪瘤内存在非脂肪瘤区域。
The objective of this study was to evaluate the diagnostic value of fat-suppressed T2-weighted (FS-T2) images or short tau inversion recovery (STIR) imaging in distinguishing lipoma from lipoma-like subtype of well-differentiated liposarcoma. Spin-echo T1-weighted and STIR or fat-suppression T2-weighted sequences were performed in 60 lipomas and 32 lipoma-like well-differentiated liposarcomas, histologically proven, looking for thick septa or nodules in T1-weighted images and linear, nodular, or amorphous hyperintensities on FS-T2/STIR sequences. Fourteen lipomas (23.3%) showed thick septa and/or nodules on T1, whereas on FS-T2 or STIR sequences only seven (11.7%) displayed hyperintense nodules and/or septa. All well-differentiated liposarcomas contained these signs on FS-T2 or STIR sequences. The presence of hyperintense septa or nodules in a predominantly lipomatous tumor on FS-T2/STIR sequences helps to differentiate malignant tumors from lipomas. Employing the presence of hyperintense nodules and/or septa as criteria of malignancy specificity was 76.6% and sensitivity 100%. Overdiagnoses of well-differentiated liposarcoma can occur due to the presence of non-lipomatous areas within lipomas.