46-year-old male with left lateral (just above the knee): Evaluate for cyst versus solid mass. Pain and nodule on left lateral knee. Patient fell one month prior. Effusion of the left knee measuring approximately 8 cm in length. Within this left knee effusion, there is a 4.4 x 1 x 3.6 cm internal echogenic focus.
Complex effusion of the left knee. Repeat MRI of the left knee is recommended for further evaluation. Patient trauma occurred 1 month ago and prior knee MRI was 3 months ago.