Metallosis! Hardware failure, especially in hip arthroplasties, can be a result of the following pathologies: 1. Simple aseptic loosening – diagnosed with progressive more than 2mm peri-hardware or peri-cement lucency and not associated to infection. Lucency about hardware is usually symmetric. 2. Infection – peri-hardware lucency greater than 2mm, but unlike loosening, usually asymmetric, focal and destructive. 3. Particle disease – previously discussed and related to debris released by hardware which in turn incites osteolysis of the surrounding bone. 4. Metallosis – also known as hardware pseudotumor and usually co-existing with particle disease and osteolysis. In imaging, metallosis is seen as a soft tissue pseudo mass created by metal debris. This mass usually is dense on radiographs and CT, due to the presence of metal. This case shows both particle disease with osteolysis at the greater trochanter and metallosis at the soft tissue adjacent to the greater trochanter. #mskrad #mskradiology #radiology #radiologia #radres #radtech #radiologyeducation #hipprosthesis #radiologyresident #msk🧞♂️
