Key result
Ultrasonography and MRI of alveolar soft part sarcoma revealed a hypervascular mass with very low resistive index on ultrasound and flow voids on MRI.
Case Report (n=1)
Alveolar soft part sarcoma should be considered in the differential diagnosis of a mass presenting with hypervascularity and very low resistive index on ultrasound, and hypervascularity with flow voids on MRI.
May prompt inclusion of alveolar soft part sarcoma in hypervascular mass differentials; leaves open need for validation beyond single case.
Alveolar soft part sarcoma (ASPS) is a rare soft-tissue sarcoma, commonly occurring in children and adolescents. The tumor mostly involves the lower extremities. The prognosis of the patient depends on whether there is metastasis. We present a 19-year-old female with ASPS in her right lower leg. Grayscale and color Doppler ultrasound showed a well-defined hypoechoic lesion with hypervascularity and very low resistive index (RI). Magnetic resonance imaging revealed iso signal intensity to muscle on T1-weighted images, high signal intensity to muscle on T2-weighted images with signal voids, and good enhancement after gadolinium administration. In a mass with hypervascularity and very low RI on sonography and hypervascularity with flow voids on magnetic resonance imaging, ASPS should be considered.
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Lai et al. (2009) conducted a case report in Alveolar soft part sarcoma (n=1). Ultrasonography and Magnetic Resonance Imaging was evaluated on Imaging characteristics. Ultrasonography and MRI of alveolar soft part sarcoma revealed a hypervascular mass with very low resistive index on ultrasound and flow voids on MRI.
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