simple bone cyst with mesenchymal proliferation involving epiphysis of the proximal fibula: a case report

Epiphyseal involvement of a simple bone cyst (sbc) is rare. furthermore, its pathological variant is even more uncommon. herein, we report a case of a 22-year-old woman with an sbc containing unusual mesenchymal tissue proliferation with epiphyseal involvement in the proximal fibula. magnetic resonance imaging showed a cystic lesion that involved the entire epiphysis as well as some soft tissue components. hence, our initial differential diagnosis did not include sbc. however, pathology confirmed a sbc. thus, sbc should be considered in the diagnosis of cystic lesions despite the atypical imaging findings.