Score | Region | Range | Parameter | 0 | 1 | 2 | 3 | 4 |
---|---|---|---|---|---|---|---|---|
New CEqCOAS | Cartilage of each carpal bone (RCB, ICB, UCB, 2CB, 3CB, 4CB) | Each: 0–12 Total (= CEqTCS): 0–72 | Severity of erosions | None | Partial-thickness erosions, each < 5 mm | Partial-thickness erosions, each > 5 mm | Partial-thickness erosions, each > 5 mm | |
Extent of erosions | None | 1–25% of the cartilage surface | 26–50% of the cartilage surface | 51–75% of the cartilage surface | 76–100% of the cartilage surface | |||
Osteochondral fragment | 0–4 | Healing and erosions | Full healing with integration with surrounding cartilage (no visible fragment) | Healing non-complete, demarcating border, healthy cartilage around fragment | Fragment attached, mild erosions around fragment | Fragment attached but with severe erosions around fragment | Defect not attached and severe erosions around defect | |
Synovial membrane | 0–6 | Hyperemia | Absent | Mild (only at ac-site) | Moderate | Severe | ||
Hyperplasia | Absent | Mild (only at ac-site) | Moderate | Severe | ||||
Existing OARSI cartilage score | Entire middle carpal joint | 0–4 | No gross fibrillation/ fissuring | Very superficial erosion with articular cartilage swelling | Partial-thickness erosions | Partial and full-thickness erosions | Extensive full-thickness erosions to the level of subchondral bone |