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| Short axis T1-weighted image through the forefoot reveals a large gouty tophus (t) along the dorsomedial aspect of the head of the first metatarsal, producing osseous erosion (red arrow). |
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| Long axis T1-weighted image through the forefoot demonstrating polyarticular disease at the lesser metatarsals with intraarticular and extraarticular erosions (red arrows). A soft tissue tophus laterally adjacent to the base of the 5th metatarsal (blue arrow) is also seen. |
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| Axial T2-weigthed image reveals an anteriorly projecting intermediate signal soft tissue lesion (red arrow) arising from the lateral paratenon of the Achilles tendon (A) in this 38 year-old male. This was proven at biopsy to be a gouty tophus. |
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| Sagittal T1-weighted image demonstrates the characteristics erosions of the middle and distal phalanges of the small finger centered at the DIP joint, with extraosseous mass lesion consistent with a tophus (t). |
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