Macroscopic morphology of the synovial blood vessels in rheumatoid arthritis (RA) and spondyloarthropathy (SpA): straight vessels, tortuous vessels, or mixed pattern. Results are shown as number (%)
| RA (n=18) | SpA (n=13) | |
|---|---|---|
| Straight | 5 (28) | 0 (0) |
| Tortuous | 5 (28) | 8 (62) |
| Mixed | 8 (44) | 5 (38) |