Mean (SD) mast cell density (cells/mm2) in normal synovium, early RA, and late RA
| ‡Normal (n=15) | Early RA (n=22) | ‡Late RA (n=16) | |
|---|---|---|---|
| Total mast cells | 9.4 (5.1)1-150 | 40.3 (27.5) | 60.9 (35.9)† |
| total MCT | 1.6 (1.6)1-150 | 29.1 (26.8) | 23.1 (21.2) |
| total MCTC | 7.8 (5.2) | 11.2 (10.1) | 38.5 (33.1)† |
| Superficial mast cells | 26.6 (17.6)1-150 | 60.5 (29.6) | 59.1 (45.2) |
| superficial MCT | 8.8 (8.7)1-150 | 43.9 (30.6) | 39.3 (38.7) |
| superficial MCTC | 17.9 (16.6) | 16.7 (17.3) | 19.9 (28.7) |
| Deeper mast cells | 6.2 (4.6)1-150 | 34.2 (29.0) | 60.1 (36.0)† |
| deeper MCT | 0.3 (0.5)1-150 | 24.0 (27.4) | 17.1 (15.3) |
| deeper MCTC | 5.9 (4.6)1-150 | 10.2 (9.4) | 43.1 (36.2)† |
↵1-150 p < 0.05 for normal synovium compared to early RA. † p < 0.05 for late RA compared with early RA. ‡ Data from reference 4.