Sonographic Appearances of Small Organizing Hematomas and Thrombi Mimicking Superficial Soft Tissue Tumors

We retrospectively reviewed 2 cases of organizing hematomas and 2 cases of intravascular organizing thrombi and investigated correlations between sonographic and pathologic findings. In all 4 cases, a well‐defined hypoechoic heterogeneous mass with surrounding increased echogenicity was evident in the subcutaneous fat layer. Organizing hematomas and thrombi have sonographic features similar to those of benign‐looking soft tissue tumors. These lesions should therefore be considered in the differential diagnosis of superficial soft tissue masses.

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