Ultrasound Guided Percutaneous Microwave Ablation for Breast Lesions

Inclusion Criteria: * breast lesion proved by using core-needle biopsy; * for benign lesions,lesion 1.0 cm or larger in greatest diameter and continually increasing during a half year follow-up; for malignant ones, lesion size 2cm or smaller; * distance of at least 1.0cm to papilla with the patients supine; * the symptoms of local pain, discomfortable or compression considered probably relating to the lesion of breast; * the patient with evidently psychological pressure due to the occurrence of the lesion; * patients unwilling or refused to receive other treatment and presence of an appropriate route for percutaneous puncture under US guidance. Exclusion Criteria: * patients who were pregnant or breast-feeding; * patients with evidence of coagulopathy or acute or severe pulmonary insufficiency or heart dysfunction; * patients during menstrual period; * patients who wanted to undergo other therapies including surgical excision and vacuum-assisted biopsy.