Table1.
Radiological features
| Parameter | Frequency | ||
|---|---|---|---|
| Location in long bones (n = 25) | Epiphyseal-metaphyseal | 44 % (n = 11) | |
| Metaphyseal-epiphyseal | 44 % (n = 11) | ||
| Epiphyseal-metaphyseal-diaphyseal | 8 % (n = 2) | ||
| Metaphyseal | 4 % (n = 1) | ||
| Centricity in long bones (n = 25) | Centric | 36 % (n =9) | |
| Eccentric | 64 % (n = 16) | ||
| Cortical expansion | 65.5 % (n = 19) | ||
| Cortical breach | On plain radiograph | 51.7 % (n = 15) | |
| On computed tomography | 75.9 % (n = 22) | ||
| Campanacci Grade | Grade 1 | 0 % (n = 0) | |
| Grade 2 | 51.7 % (n = 15) | ||
| Grade 3 | 48.3 % (n = 14) | ||
| Type of lesion | Geographic | Hairline sclerotic rim | 44.8 % (n = 13) |
| Thick sclerotic rim | 17.2 % (n = 5) | ||
| No sclerotic rim | 13.8 % (n =4) | ||
| Moth-eaten / Permeative | 24.1 % (n = 7) | ||
| Pseudo-trabeculations | 62.1 % (n = 18) | ||
| Pathological fracture | 10.3 % (n = 3) | ||
| Soft tissue extension | 48.3 % (n = 14) | ||
| Joint involvement | Distorted articular cartilage | 34.5 % (n = 10) | |
| Joint infiltration | 13.8 % (n = 4) | ||
| Relation of tumour margin with subchondral bone | ≤ 5mm | 89.7 % (n = 26) | |
| 5 -10 mm | 13.8 % (n = 4) | ||
| > 10mm | 6.9 % (n = 2) | ||
| MRI T1 imaging (solid tumor component) | Hypo-intense | 62.1 % (n = 18) | |
| Iso-intense | 31.0 % (n = 9) | ||
| Hyper-intense | 6.9 % (n = 2) | ||
| MRI T2 imaging (solid tumour component) | Hypo-intense | 69.0 % (n = 20) | |
| Iso-intense | 3.4 % (n = 1) | ||
| Hyper-intense | 27.6 % (n = 8) | ||
| Cystic components | 48.3 % (n = 14) | ||
| Fluid-fluid levels (Secondary ABC) | 13.8 % (n = 4) | ||
| Hemosiderin deposits | 10.3 % (n = 3) | ||
ABC: Aneurysmal Bone Cyst