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Open Access 01-12-2021 | osteoid osteoma | Case report
Epiphyseal enchondroma masking as osteoid osteoma: a case report
Published in: European Journal of Medical Research | Issue 1/2021
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Background
Enchondromas originating in the epiphyses of long bones are rare and epiphyseal osteoid osteomas are also uncommon. Diagnosis can become elusive when enchondromas or osteoid osteomas occur in atypical locations and present with nonspecific clinical and imaging characteristics.
Case presentation
We report a case of epiphyseal enchondroma of the left proximal femur in a 15-year-old girl with a 2-month history of left lower extremity pain. Preoperative CT displayed thickened cortex in the anterior surface of the left proximal femur with specks of calcification and inhomogeneity of the adjacent bone marrow cavity. She was diagnosed with osteoid osteoma. Postoperative pathological examination of surgically excised specimens revealed a diagnosis of enchondromas.
Conclusions
Our case highlights that enchondroma should be considered in lesions of the epiphysis.