Miwa Takao, Otsuji Kentaro, Aiba Masashi, Kochi Takahiro, Toda Katsuhisa, Nakamura Noriaki, Katsumura Naoki, Miyazaki Tatsuhiko, Shimizu Masahito
Department of Gastroenterology, Chuno Kousei Hospital, Japan.
Department of Pathology, Gifu University Hospital, Japan.
J Rural Med. 2020 Apr;15(2):68-72. doi: 10.2185/jrm.2019-013. Epub 2020 Apr 1.
Liposarcoma is one of the most common types of soft tissue sarcomas and can develop at any site, although omental liposarcoma is extremely rare. Omental liposarcoma has a poor prognosis because the diagnosis is difficult, until it presents as a large tumor causing severe noticeable clinical symptoms. A 51-year-old male with lower abdominal pain was referred to our clinic. Abdominal ultrasonography revealed an ill-defined, solid, heterogeneous, and hypoechoic tumor deep in the lower abdomen. Generally, liposarcomas are hyperechoic, though 20% of liposarcomas present as hypoechoic tumors. This variation might occur depending on the pathological classification. We should consider the possibility of a dedifferentiated component if ultrasonography reveals typical features of soft tissue sarcoma with hypoechoic lesion.
脂肪肉瘤是最常见的软组织肉瘤类型之一，可发生于任何部位，尽管大网膜脂肪肉瘤极为罕见。大网膜脂肪肉瘤预后较差，因为诊断困难，直到它发展为引起严重明显临床症状的大肿瘤时才被发现。一名51岁下腹痛男性被转诊至我院。腹部超声检查发现下腹部深处有一个边界不清、实性、不均匀且低回声的肿瘤。一般来说，脂肪肉瘤是高回声的，不过20%的脂肪肉瘤表现为低回声肿瘤。这种差异可能取决于病理分类。如果超声检查显示具有低回声病变的软组织肉瘤的典型特征，我们应考虑存在去分化成分的可能性。
