Table 2.
Clinical and radiographic characteristics of ECs and low-grade CSs that were confirmed on pathology or biopsy.
| Demographics | EC/Low Grade Cartilaginous Lesions | Grade 1 CSs | p-Value |
|---|---|---|---|
| Patients in Each Group (Total = 28) | 23 | 5 | |
| Age (years ± SD) | 39.7 ± 12.3 | 48.4 ± 9.0 | 0.183 |
| Sex (M/F) | 19 F, 4 M | 5 F | 0.568 |
| Patients with Surgical Intervention | 91% | 100% | 1 |
| Time of Progression to Surgery (months ± SD) | 8.7 ± 13.8 | 1.7 ± 1.2 | 0.289 |
| Imaging Findings | EC/Low Grade Cartilaginous Lesions | Grade 1 CSs | p-Value |
|---|---|---|---|
| Size at Initial Presentation (mm ± SD) | 45.3 ± 34.6 | 59.5 ± 20.3 | 0.441 |
| Number of Lesions > 7 cm | 22% | 20% | 1 |
| Location of Lesion | 9 M, 8 M/D, 4 D, 2 E/M | 3 M/D, 2 M | |
| Mineralization | 61% | 100% | 0.144 |
| Endosteal Scalloping | 35% | 60% | 0.353 |
| Surrounding Bone Edema | 17% | 40% | 0.286 |
| Surrounding Soft Tissue Edema | 9% | 20% | 0.459 |
| Soft Tissue Mass | 0% | 0% | 1 |
| Clinical Symptoms | EC/Low Grade Cartilaginous Lesions | Grade 1 CSs | p-Value |
|---|---|---|---|
| Shoulder Pain | 91% | 100% | 1 |
| Pain attributed to tumor | 52% | 100% | 0.125 |
| Night Pain | 35% | 0% | 0.281 |
| Activity-Related pain | 87% | 80% | 1 |
| Additional Shoulder Injury | 43% | 40% | 1 |
| Concurrent Rotator Cuff Injury | 30% | 40% | 1 |
| Incidentally noticed? | 65% | 40% | 0.353 |
M/D, metaphyseal/diaphyseal; M, metaphyseal; D, diaphyseal; M/E, metaphyseal/epiphyseal.