Giant-Cell Lesion in a Sesamoid Bone of the Thumb

We treated a 72-year-old woman by excision of the right thumb sesamoid which contained a giant-cell lesion. Nine years later she had normal function and no evidence of other lesions, recurrence or metastasis. We recommend that the diagnosis of giant-cell reparative granuloma and giant-cell tumour be considered when a bony mass in a sesamoid bone is discovered. Surgical excision at least in our one case was definitive treatment.