52-year-old woman was presented with palpitation and weight loss. Thyroid function test revealed low thyroid-stimulating hormone level with upper normal range of Free T4 and thyroid scan showed 2 cm hot nodule in left upper pole. Thyroid ultrasonography was also done and it showed two nodules in left upper pole. The one was considered as functioning benign nodule, but the other nodule was compatible with malignancy. She underwent total thyroidectomy and final pathology revealed papillary thyroid carcinoma.