Ultrasound Video Challenge – Musculoskeletal (MSK)

We bring you our weekly SonoSim Ultrasound Challenge! Can you give us the correct answer?

This 63-year-old female presents with pain, swelling, and warmth of her left knee following an intra-articular injection of cortisone two days prior. Please examine the area of swelling along the left distal femur and knee with sonography.