Defining elementary lesions at entheses sites according to age groups.
| Entheses Sites | Elementary Lesions | Age ≤ 50 Yrs, n = 51 | Age > 50 Yrs, n = 29 | Total, n = 80, n (%) |
|---|---|---|---|---|
| Quadriceps tendon | ||||
| Hypoechogenicity (H) | 0 | 19 | 19 (23.7) | |
| Thickening (T) | 4 | 10 | 14 (17.5) | |
| H and T | 0 | 8 | 8 (10.0) | |
| Power Doppler | 0 | 0 | 0 | |
| Enthesophyte | 12 | 20 | 32 (40.0) | |
| Calcification | 0 | 3 | 3 (3.75) | |
| Erosion | 0 | 1 | 1 (1.25) | |
| Proximal patellar tendon | ||||
| Hypoechogenicity (H) | 0 | 1 | 1 (1.25) | |
| Thickening (T) | 34 | 22 | 56 (70.0) | |
| H and T | 0 | 1 | 1 (1.25) | |
| Power Doppler | 0 | 0 | 0 | |
| Enthesophyte | 3 | 4 | 7 (8.75) | |
| Calcification | 1 | 1 | 2 (2.50) | |
| Erosion | 0 | 0 | 0 | |
| Distal patellar tendon | ||||
| Hypoechogenicity (H) | 9 | 5 | 14 (17.5) | |
| Thickening (T) | 24 | 13 | 37 (46.2) | |
| H and T | 5 | 4 | 9 (11.25) | |
| Power Doppler | 1 | 1 | 2 (2.50) | |
| Enthesophyte | 8 | 9 | 17 (21.5) | |
| Calcification | 7 | 2 | 9 (11.2) | |
| Erosion | 0 | 3 | 3 (3.75) | |
| Achilles tendon | ||||
| Hypoechogenicity (H) | 1 | 11 | 12 (15.0) | |
| Thickening (T) | 0 | 6 | 6 (7.50) | |
| H and T | 0 | 3 | 3 (3.75) | |
| Power Doppler | 0 | 4 | 4 (5.0) | |
| Enthesophyte | 36 | 27 | 63 (78.7) | |
| Calcification | 2 | 2 | 4 (5.0) | |
| Erosion | 0 | 0 | 0 | |
| Plantar fascia | ||||
| Hypoechogenicity (H) | 0 | 2 | 2 (2.50) | |
| Thickening (T) | 6 | 12 | 18 (22.5) | |
| H and T | 0 | 1 | 1 (1.25) | |
| Power Doppler | 0 | 0 | 0 | |
| Enthesophyte | 0 | 6 | 6 (7.50) | |
| Calcification | 0 | 0 | 0 | |
| Erosion | 1 | 1 | 2 (2.50) | |
| Triceps tendon | ||||
| Hypoechogenicity (H) | 3 | 5 | 8 (10.0) | |
| Thickening (T) | 0 | 2 | 2 (2.50) | |
| H and T | 0 | 0 | 0 | |
| Power Doppler | 1 | 2 | 3 (3.75) | |
| Enthesophyte | 10 | 12 | 22 (27.5) | |
| Calcification | 1 | 2 | 3 (3.75) | |
| Erosion | 0 | 0 | 0 |