Clinical Research Directory

Inclusion Criteria: * Ultrasound examination within 3 months clearly indicates that breast lesions are BI-RADs4a/4b/4c * Surgical treatment within one week after Exhaled VOC test * informed consent form should be signed Exclusion Criteria: * Male * Women who have been diagnosed as breast cancer by puncture * Individuals with unclear BI-RADs level information by breast ultrasound, including but not limited to BI-RADs 4/3-4a/4a-b/4b-c * Pregnant or lactating women * A positive smoking history within one year * Medical history of malignant tumor, including but not limited to breast cancer (excluding skin basal cell carcinoma) * The past history of metabolic diseases, including diabetes, gout, etc * Respiratory diseases that have been clearly diagnosed in the past, such as asthma and chronic obstructive pulmonary emphysema, are not suitable for participation in the study * Previously diagnosed digestive system diseases, such as Helicobacter pylori positivity and gastric ulcers, are not suitable for participation in the study * Combination application of drugs related to the treatment of elderly dementia * Possible cases which researchers believe it is not suitable for this clinical research