Reason: R proximal tibia mass present for 1 yr, not expanding but now painful, evaluate for malignancy History: R knee painful mass A mass is located in the soft tissues anterolateral to the proximal tibia, with nonspecific MRI features including high T2 signal and low T1 signal, as well as thick walls with inhomogeneous peripheral enhancement. No calcification is seen within the surrounding soft tissues. The mass does not cause cortical destruction or local invasion of the bone. There is marked increase in red marrow signal likely related to patient's known sickle cell disease.While this study was not protocoled for routine knee, the ligaments and tendons appear grossly normal.
1.Soft tissue mass anterolateral to the tibia with nonspecific MRI features, which may represent an irregular ganglion cyst, although thickened walls and inhomogeneous enhancement make this less likely. No aggressive features are identified. Tissue sampling is recommended.2.Diffuse increase in red marrow signal related to patient's known sickle cell disease.