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Adamantinoma of the proximal femur: a case report

, : Adamantinoma of the proximal femur: a case report. Journal of Orthopaedic Science 9(2): 152-156

Adamantinoma is a rare low-grade malignant bone tumor with an indolent course. The tibia is involved in 85%-90% of long-bone cases. We encountered a patient with primary adamantinoma of the proximal femur. A 60-year-old woman fell and fractured her proximal left femur in the area of a cystic lesion. She underwent an osteosynthesis procedure, and bone union was obtained. After 3 years she developed pain in the left thigh, and a radiographic abnormality was found at the fracture site. A metastatic bone tumor was suspected, and curettage and cementing were carried out. Histologically, we found an epithelial component but failed to detect any primary cancer. Local recurrence became evident after another 6 years. A marginal excision was performed and a bipolar femoral prosthesis was implanted. We finally diagnosed the patient with adamantinoma. In this report we describe the characteristics of this tumor and discuss the reasoning concerning the differential diagnosis and therapeutic plan.


PMID: 15045543

DOI: 10.1007/s00776-003-0753-4

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