|Classification and external resources|
Adamantinoma (from the Greek word adamantinos, meaning "very hard") is a rare bone cancer, making up less than 1% of all bone cancers. It almost always occurs in the bones of the lower leg and involves both epithelial and osteofibrous tissue.
Patients typically present with swelling with or without pain. The slow-growing tumor predominantly arises in long bones in a subcutaneous location (95% in the tibia or fibula). Most commonly, patients are in their second or third decade, but adamantinoma can occur over a wide age range.
Treatment consists of wide resection or amputation. Metastases are rare at presentation but may occur in up to 30% of patients during the disease course. Prognosis is excellent, with overall survival of 85% at 10 years, but is lower when wide surgical margins cannot be obtained. This tumor is insensitive to radiation so chemotherapy is not typically used unless the cancer has metastized to the lungs or other organs.
Prior name for ameloblastoma
The typically benign odontogenic tumor known as ameloblastoma was first recognized in 1827 by Cusack but did not yet have any designation. In 1885, this kind of odontogenic neoplasm was designated as an adamantinoma by Malassez and was finally renamed to the modern name ameloblastoma in 1930 by Ivey and Churchill. Some authors still confusingly misuse the term adamantinoma to describe ameloblastomas, however they differ in histology and frequency of malignancy.
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