case_images: PMC8633896_01
case_images: The patient's physical examination was performed.
case_images: fpsyg-12-744433-g0001.jpg
case_images: PMC8633896_01_fpsyg-12-744433-g0001.jpg
case_images: F1
case_images: On April 24, 2019, a Physical and Rehabilitation Medicine (PRM) physician performed physical examinations (Figure 1), and a PRM physician experienced in musculoskeletal ultrasound diagnostic used Samsung HM70A model 5 18 Hz frequency probe to examine the patient's painful knee joint.
case_images: The patient's deep subpatella sac effusion.
case_images: fpsyg-12-744433-g0002.jpg
case_images: PMC8633896_01_fpsyg-12-744433-g0002.jpg
case_images: F2
case_images: An echoless area (about 0.57*0.35) was visible on the deep surface of the patellar tendon (Figure 2).