1.Ultrasonographic findings and diagnosis of omental dedifferentiated liposarcoma: a case report
Takao MIWA ; Kentaro OTSUJI ; Masashi AIBA ; Takahiro KOCHI ; Katsuhisa TODA ; Noriaki NAKAMURA ; Naoki KATSUMURA ; Tatsuhiko MIYAZAKI ; Masahito SHIMIZU
Journal of Rural Medicine 2020;15(2):68-72
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.
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