Retroperitoneal well-differentiated inflammatory liposarcoma: a diagnostic dilemma.

Radiation medicine Pub Date : 2008-08-01 Epub Date: 2008-09-04 DOI:10.1007/s11604-008-0255-6

Rinsaku Kawano, Akihiro Nishie, Kengo Yoshimitsu, Hiroyuki Irie, Tsuyoshi Tajima, Masakazu Hirakawa, Kousei Ishigami, Yasuhiro Ushijima, Daisuke Okamoto, Hidetake Yabuuchi, Akinobu Taketomi, Yunosuke Nishihara, Nobuhiro Fujita, Hiroshi Honda

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引用次数: 11

Abstract

We present a case of retroperitoneal well-differentiated inflammatory liposarcoma that was extremely difficult to diagnose preoperatively. Computed tomography and magnetic resonance images showed a 5-cm homogeneous soft-tissue mass with a decreased apparent diffusion coefficient and without fat component in the retroperitoneum. Minimal fat stranding was detected around the mass. The preoperative working diagnosis was malignant lymphoma or inflammatory pseudotumor, whereas the final diagnosis after surgery was well-differentiated inflammatory liposarcoma. As a result, only a large component of lymphoid infiltration was recognized as a tumor preoperatively, and minimal fat stranding represented a component of lipoma-like liposarcoma. In this entity, a lipomatous component could easily be missed on radiologic imaging because of the conspicuity of lymphoid infiltration. We should consider the possibility of this variant when we evaluate a retroperitoneal tumor.

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腹膜后高分化炎性脂肪肉瘤:诊断困境。

我们报告一例腹膜后高分化炎性脂肪肉瘤，术前诊断极为困难。计算机断层扫描和磁共振成像显示腹膜后5厘米均匀软组织肿块，明显扩散系数降低，无脂肪成分。在肿块周围检测到最小的脂肪滞留。术前工作诊断为恶性淋巴瘤或炎性假瘤，术后最终诊断为分化良好的炎性脂肪肉瘤。因此，术前只有很大一部分淋巴浸润被认为是肿瘤，而最小的脂肪搁浅代表了脂肪瘤样脂肪肉瘤的组成部分。在这种情况下，由于淋巴浸润的显著性，在放射影像上很容易遗漏脂肪瘤成分。当我们评估腹膜后肿瘤时，我们应该考虑这种变异的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Radiation medicine

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