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. 2003 Mar-Apr;23(2C):1713-8.

Distinction between well-differentiated liposarcoma and intramuscular lipoma by power Doppler ultrasonography

Hiroyuki Futani  1 , Tokuyoshi Yamagiwa, Hitoshi Yasojimat, Masaru Natsuaki, Marie Stugaard, Soji Maruo
Affiliations
  • PMID: 12820446

Distinction between well-differentiated liposarcoma and intramuscular lipoma by power Doppler ultrasonography

Hiroyuki Futani et al. Anticancer Res. 2003 Mar-Apr.

Abstract

Background: This study evaluates the feasibility of ultrasonography in the distinction between well-differentiated liposarcoma (WDLS) and intramuscular lipoma (IL).

Materials and methods: Three WDLSs and 9 ILs were included. Gray scale images were assessed for echogenicity, textural pattern and margins. Power Doppler ultrasonography was used to assess the number of detectable flow velocity signals in a 3 x 3 cm area. Furthermore, the ratio of the area occupied by colour flow signals relative to the selected area was determined.

Results: Gray scale images showed no differences between WDLSs and ILs. However, power Doppler showed more than 2 flow velocity signals in all WDLSs, whereas only 11% of the ILs had 2 signals. In all WDLSs, colour flow signals occupied more than 30% of the selected area. In contrast, ILs were characterized by a low color-dot ratio. Histologically, increased vascularity was found close to malignant cell invasions.

Conclusion: Power Doppler ultrasonography is feasible to evaluate increased vascularity and thus differentiate WDLSs from ILs.

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