Objective: A case of oral metastatic follicular thyroid carcinoma is presented. Background: Metastatic tumours are more frequent in older individuals and can be the only sign/symptom of an undiagnosed primary malignancy. Case report: A 69-year-old lady presented with an enlarging mandibular swelling. Incisional biopsy and imaging studies were suggestive of metastatic follicular thyroid carcinoma. Conclusion: Metastatic tumours should be considered in the differential diagnosis of mandibular swellings especially in older individuals.