Table 1.
Demographics, clinical presentation and radiographic characteristics of 13 children with pelvic aneurysmal bone cyst (ABC). MRI Magnetic resonance imaging
| Case | Sex | Age (years) | Presentation | Presenting symptoms | Symptoms duration (months) | Lesion location | Radiographic findings | Computed tomography | MRI |
|---|---|---|---|---|---|---|---|---|---|
| 1 | F | 10.5 | Primary | Hip pain, inability to bear weight | 7 |
Ilium Peri-acetabular |
Expansile lytic lesion with hip subluxation | Large expansile osteolytic lesion with a soft tissue component | None |
| 2 | M | 6.1 | Primary | Hip pain | 12 | Pubis | Expansile lytic lesion | Large expansile osteolytic lesion | None |
| 3 | M | 17.5 | Recurrent | Hip pain | 6 |
Ilium Peri-acetabular |
Expansile lytic lesion | Large expansile osteolytic recurrent lesion | None |
| 4 | F | 15.1 | Primary | Accidental finding after MV accident | – | Pubis | Expansile lytic lesion with pathologic fracture | None | None |
| 5 | M | 16.3 | Primary | Hip pain | 2 | Ischium | Non-expansile well defined lesion | Well-circumscribed non-expansile osteolytic lesion with mild cortical disruption | Well defined lesion with heterogeneous signal, fluid–fluid levels |
| 6 | M | 13.9 | Primary | Hip pain, pathologic fracture | 0.5 | Pubis | Expansile lytic lesion with pathologic fracture | Expansile osteolytic lesion and pathologic fracture | Expansile lesion with internal septations and fluid–fluid levels |
| 7 | F | 15.8 | Primary | Accidental finding during evaluation for nephrolithiasis | – | Ilium | Expansile lytic septate lesion | Expansile osteolytic, some fibrous septae within | Fluid filled expansile lesion with internal septations; fluid–fluid levels |
| 8 | M | 4.1 | Primary | Limp | 6 | Ilium | Expansile lytic lesion with cortical destruction | Large expansile osteolytic lesion with a thin expanded cortex with thick periosteal reaction | Fluid filled expansile lesion with internal septation and fluid–fluid levels with a soft tissue mass |
| 9 | M | 12.6 | Primary | Hip pain, pathologic fracture | 0 |
Ilium Peri-acetabular |
Expansile lytic septate lesion | Expansile osteolytic lesion | None |
| 10 | F | 9.9 | Recurrent | Hip pain | 16 |
Ilium Peri-acetabular |
Expansile lytic lesion with cortical destruction | Large expansile osteolytic lesion | Fluid filled expansile lesion with internal septation and fluid–fluid levels |
| 11 | M | 17.5 | Primary | Hip pain | 6 | Ilium—iliac wing | Expansile lytic lesion | Large expansile osteolytic lesion | None |
| 12 | M | 13.6 | Primary | Pelvic pain and limp | 1 | Ilium, periacetabular | Expansile lytic lesion | Large expansile osteolytic lesion with multiple internal septations | None |
| 13 | F | 14.7 | Primary | Groin pain | 5 | Pubis | Expansile lytic lesion | None | Fluid filled expansile lesion with internal septation and fluid–fluid levels |