Case 93 A 7-year-old girl with pain and swelling in the left ankle and a limp for 2 to 3 months. (A) Anteroposterior radiograph: There is a well-defined, expansile, lytic lesion in the metaphysis of the fibula with fine trabeculation (arrow). There is periosteal reaction. (B) Sagittal T2 image: There is an expansile, lobulated, septate lesion with a thin, well-defined rim of low signal intensity (arrow). There are fluid-fluid levels. • Aneurysmal bone cyst (ABC): This lesion is characteristic of an ABC. • Solitary bone cyst:
Clinical Presentation
Further Work-up
Imaging Findings
Differential Diagnosis
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