Fluid collection with the fibrous capsule created by the prosthesis prior to its removal. The capsule itself has not been removed (and is seen as a T2 hypointense ring) so fluid has reaccumulated within it looking like a prosthesis. We know that this fluid is not silicone as there were only water and fat peaks on resonance frequency analysis. Note on the coronal view small droplets of free silicone are seen in the left breast above the seroma extending up into the axilla as a result of the previous rupture.