| Non-MoM DMNTHA (N = 123 hips) | MoM HRA (N = 44 hips) | MoM LHTHA (N = 118 hips) | MoP OLTHA (N = 31 hips) |
---|---|---|---|---|
Synovial Structure | Â | Â | Â | Â |
Synovial Layer Loss (%) | 99 | 89 | 99 | 16.1 |
Soft Tissue Necrosis (%) | 53‡ | 11‡ | 32‡ | 0‡ |
Sarcoid-like Granulomas (%) | 16* | 0* | 5* | 0 |
Campbell Score (median) | 8§ | 5§ | 6§ | - |
Cellularity | Â | Â | Â | Â |
Macrophages (% Grade 1, Grade 2, Grade 3) | 7, 51, 42^ | 0, 5, 95^ | 1, 34, 65^ | 3, 16, 81^ |
Lymphocytes (% Grade 1, Grade 2, Grade 3, Grade 4) | 7, 29, 34, 24° | 25, 18, 11, 7 ° | 25, 31, 23, 10° | 10, 0, 0, 0° |
Plasma Cells (% Grade 1, Grade 2) | 26, 18 | 11, 9 | 29, 18 | 0, 0 |
Eosinophils (%) | 20 | 9 | 17 | 0 |
Macrophage Content | Â | Â | Â | Â |
Polyethylene Particles (%) | 2 | 0 | 0 | 80 |
Metallic Particles (%) | 8# | 39# | 30# | 65# |
Corrosion Products (%) | 95 | 100 | 99 | 0 |
Large Aggregates | 74¶ | 11¶ | 63¶ | 0¶ |
Bone and Bone Marrow | N = 58 | N = 44 | N = 36 | N = 0 |
Necrosis (%) | 47 | 11 | 23 | - |
Macrophage Infiltration (%) | 57 | 67 | 73 | - |
Germinal Centers (%) | 12 | 2 | 3 | - |
Osteolysis (# cases) | 4 | 9 | 4 | - |