Conclusion: Indications for lobectomy for papillary thyroid microcarcinoma with the following satisfying conditions: (1) papillary thyroid cancer and the largest diameter of the nodule <= 1 cm and (2) monofocal, (3) No extrathyroid extension; (4) no cervical lymph node metastasis confirmed on preoperative ultrasound and detected intraoperatively; (5) no distant metastases; (6) no history of neck irradiation; (7) no family history of thyroid cancer.