Fig. 8
From: Spectrum of MRI features of ganglion and synovial cysts
a-c. Ruptured Baker’s cyst in a 62-year-old man presenting with acute pain in the popliteal fossa and the medial side of the left leg after a run. Sagittal FS PD-weighted MRI (a) shows diffuse hypodermic edema and a popliteal cyst with irregular and undefined margins in close relation to the medial gastrocnemius muscle and the semimembranosus tendon (arrow). Axial FS PD-WI MRI along the proximal-to-distal axis (b and c) better demonstrates the intrasubstance edema of the semimembranosus tendon (arrows) so as to show the fluid tracking along the medial side of the leg, adjacent to the medial gastrocnemius muscle and the pes anserinus. MGc, medial gastrocnemius