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Ultrasound guided core biopsy (8 MHz, linear transducer) of a synovial sarcoma in a 44-year-old woman located between the left rectus abdominis muscle and the aponeurosis of the transversus abdominis muscle, outside the peritoneal cavity.
A round, hypoechoic solid mass is visible (arrowheads) with several internal echoes. Color Doppler ultrasound revealed no internal vascularity.
