MR Imaging of Intra- and Periarticular Cyst-Like Lesions of the Knee Joint in Workers with Occupational Kneeling
Figure 1
Synovial recess along the popliteus tendon presented at three distances from the popliteus hiatus. (a) Overview of the course of the popliteus tendon (arrow) and its intimately related synovial recess (white arrow heads) on a coronal MRI fat saturated T2-weighted image of the dorsal aspect of the left knee without effusion in a 64-year-old male floor layer. The white lines illustrate the level of the axial proton density fat-saturated images b, c, and d. (b) The popliteus tendon (arrow) is embedded in the synovial recess (white arrow head) close to the joint space of the knee. Popliteal cyst (crossed arrow) communicates with a subgastrocnemius bursa (black arrowhead). (c, d) Note the characteristic appearance of the not distended synovial recess (arrow head) of a branch of the popliteus tendon (arrow) at the level of the fibular head (FH). The recess should not be mistaken for a ganglion cyst originating from the proximal tibiofibular joint. MC and LC, medial and lateral femoral condyle; T, tibia; S, semimembranosus tendon; PM, popliteus muscle.
