Abstract:Objective To retrospectively analyze 70 case with breast nodules (Φ≤2 cm) of ultrasonic BI-RADS category 3, and explore the risk factors for clinical intervention in order to improve the level of clinical diagnosis and treatment. Methods A retrospective analysis was performed for 70 patients with breast nodules (Φ≤2 cm) of BI-RADS categories 3 who underwent the first ultrasound examination in the Fifth Affiliated Hospital of Xinjiang Medical University between June 2011 and December 2013. Results Of the 70 breast nodules, 3(4.29%) were malignant and 67 (95.71%) were benign. The age (χ2 = 5.011, P = 0.027), menopause (χ2 = 9.240, P = 0.004), the number of nodules (χ2 = 7.624, P = 0.010), the upper outer quadrant (χ2 = 8.182, P = 0.007), family history of breast cancer (χ2 = 7.222, P = 0.013), history of benign breast disease (χ2 = 9.892, P = 0.003), the menarche age (χ2 = 9.736, P = 0.003) and no birth (χ2 = 8.182, P = 0.007) were closely related to disease progression; but not correlated with estrogen level or BMI index. Conclusions Age, menopause, single nodule, location in the outer upper quadrant, family history of breast cancer, history of benign breast disease, the menarche age and no birth are closely associated with breast disease progression. Patients with breast nodules of BI-RADS 3 who have the above risk factors should take clinical intervention; if necessary, surgical treatment. Follow-up observation is not recommended for the patients to avoid aggravating the disease process.