Frequency of the presence of PD-US changes at each examined entheseal site in the 3 populations.*
| Entheseal site | Cortical Bone Insertion | Preinsertional Area | Body of Tendon | Bursa | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PsA | Psoriasis | FMS | PsA | Psoriasis | FMS | PsA | Psoriasis | FMS | PsA | Psoriasis | FMS | |
| Common extensor insertion on the epicondyle | 15 (10.7) | 4 (7.8) | 3 (5.9) | 18 (12.9) | 5 (9.8) | 3 (5.9) | 21 (15) | 3 (5.9 | 5 (9.8) | 0 | 1 (2) | 1 (2) |
| Quadriceps tendon | 10 (7.1) | 5 (9.8) | 1 (2) | 8 (5.7) | 3 (5.9) | 2 (3.9) | 7 (5) | 2 (3.9) | 0 | 5 (3.6) | 0 | 1 (2) |
| Patellar tendon | 13 (9.3) | 6 (11.8) | 1 (2) | 24 (17.1) | 8 (15.7) | 3 (5.9) | 7 (5) | 1 (2) | 1 (2) | 2 (1.4) | 1 (2) | 0 |
| Medial collateral ligament | 18 (12.9) | 2 (3.9) | 1 (2) | 8 (5.7) | 1 (2) | 1 (2) | 12 (8.6) | 0 | 1 (2) | 1 (0.7) | 0 | 0 |
| Achilles tendon | 18 (12.9) | 2 (3.9) | 3 (5.9) | 18 (12.9) | 2 (3.9) | 1 (2) | 14 (10) | 4 (7.8) | 2 (3.9) | 11 (7.9) | 3 (5.9) | 1 (2) |
| Plantar fascia insertion on the calcaneus | 0 | 0 | 0 | 1 (0.7) | 1 (2) | 0 | 1 (0.7) | 0 | 0 | 0 | 0 | 0 |
Data are shown as no. patients (%) and expressed in terms of affected patients.
↵* PsA: n = 140 patients; psoriasis: n = 51 patients; FMS: n = 51 patients. FMS: fibromyalgia syndrome; PsA: psoriatic arthritis; PD-US: power Doppler ultrasonography.