Prevalence of inflammatory abnormalities at the 9 bilateral entheses in patients with ankylosing spondylitis, at baseline (n = 111). Values are presented as no. patients and no. lesions.
| Total | Bursitis | Effusion | Hypoechogenicity | Thickening | Positive PD | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pts. | Lesions | Pts. | Lesions | Pts. | Lesions | Pts. | Lesions | Pts. | Lesions | Pts. | Lesions | |
| Entheses total | 88 | 254 | 42 | 86 | 9 | 10 | 6 | 6 | 10 | 13 | 69 | 139 |
| Plantar fascia | 3 | 3 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 1 |
| Achilles tendon | 13 | 21 | 11 | 14 | 0 | 0 | 0 | 0 | 2 | 2 | 4 | 5 |
| Tibial tuberosity | 10 | 15 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 10 | 12 |
| Patellar tendon | 28 | 42 | 23 | 31 | 1 | 1 | 0 | 0 | 1 | 1 | 6 | 9 |
| Quadriceps tendon | 25 | 43 | 20 | 33 | 1 | 1 | 0 | 0 | 1 | 1 | 8 | 8 |
| Pes anserine | 34 | 59 | 2 | 2 | 2 | 3 | 1 | 1 | 3 | 4 | 31 | 49 |
| Greater trochanter (hip) | 12 | 19 | 4 | 5 | 0 | 0 | 0 | 0 | 1 | 2 | 8 | 12 |
| Medial epicondyle (elbow) | 11 | 13 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 10 | 11 |
| Lateral epicondyle (elbow) | 24 | 39 | 0 | 0 | 1 | 1 | 4 | 4 | 2 | 2 | 23 | 32 |
Total number of included patients: 111; number of examined entheses per patient: 18; number of possible structural lesions per enthesis: 3. PD: power Doppler.