Fig. 7
From: Imaging in rheumatology: reconciling radiology and rheumatology
A 73-year-old man with anterior knee pain and soft tissue swelling suspicious for bursitis. Ultrasound demonstrated a highly echogenic prepatellar mass, not typical for bursitis (a, sagittal extended field of view image). MRI in T1w (b, sagittal) and T2w (c, axial) showed a lowish signal T1 and mixed signal T2 lesion. The appearances are unspecific. Biopsy confirmed a gout tophus. Gout tophi can have varied appearances on MRI, the diagnosis in atypical locations in difficult based on imaging alone