67-year-old female with cyst over the lateral malleolus, movable, compressible with increase in size over the past 2 weeks. Now with lesion/cyst over lateral malleolus of left ankle. Markers were placed along the lateral aspect of the ankle denoting the site of the mass. There is an elongated multilobulated and septated collection of fluid signal intensity within the subcutaneous fat along the anterior aspect of the distal fibula extending inferiorly beneath the fibular tip to the opening of the sinus tarsus. It shows thin peripheral and septal enhancement and measures approximately 1 cm in diameter and overall approximately 4 cm in length. Its characteristics are typical of a ganglion. Bone marrow signal intensity is normal. We see no joint effusion or synovitis. Although this study was not protocoled specifically for evaluation of the tendons and ligaments, we see no gross abnormalities. Note is made of a small accessory navicular bone.
Ganglion within the lateral soft tissues of the ankle.