Table 1 Histological grading system used for all cases of ALTR
Synovial Structure | Cellularity | Macrophage Content | Bone and Bone Marrow Involvement |
|---|---|---|---|
Synovial Layer Loss (Present, Absent) | Macrophages (Grade 0–3) | Polyethylene Particles (Present, Absent) | Necrosis (Present, Absent) |
Cell Exfoliation (Present, Absent) | Lymphocytes (Grade 0–4) | Metal Particles (Present, Absent) | Macrophages (Present, Absent) |
Soft Tissue Necrosis (Present, Absent) | Stromal Cells (Grade 1–3) | Corrosion Products (None, Intracellular, Extracellular) | Reactive Lymphocytic Aggregates (Present, Absent) |
Vascular Wall Changes (Present, Absent) | Neutrophils (Present, Absent) | Â | Germinal Centers (Present, Absent) |
Granulomas (Present, Absent) | Plasma Cells (Grade 0–2) |  |  |
| Â | Eosinophils (Present, Absent) | Â | Â |