99mTc-HPArk2 SPECT/CT for the Detection of HER2-positive Breast Cancer

99mTc-HPArk2 SPECT/CT for the Detection of HER2-positive Breast Cancer

This is an open-label single photon emission tomography/computed tomography (SPECT/CT) study to investigate the diagnostic performance and evaluation efficacy of 99mTc-HPArk2 in breast cancer patients. A single dose of 11.1Mega-Becquerel (MBq) per kilogram body weight 99mTc-HPArk2 will be injected intravenously. Visual and semiquantitative method will be used to assess the SPECT/CT images.

99mTc-HPArk2 is an affibody probe targeting HER2. The investigators will determine the use of 99mTc-HPArk2 SPECT/CT in the detection of HER2-positive breast cancer, and to compare its diagnostic value with routine immunohistochemistry (IHC) pathological staining. HER2 imaging, specifically to HER2 receptor expressed on malignant breast cancer cell surface, might help for targeted therapy with monoclonal antibody such as trastuzumab in breast cancer, and may improve the treatment strategy of breast cancer. The investigator will determine the use of 99mTc-HPArk2 SPECT/CT in stratifying breast cancer.

Inclusion Criteria:

• patients in suspicion of breast cancer by mammography or ultrasonography,and being able to provide basic information and sign the written informed consent form

Exclusion Criteria:

• The exclusion criteria included claustrophobia, pregnancy, breastfeeding, kidney or liver failure, inability to fulfill the study, and undergoing any preceding local or systemic therapies that might interfere with HER2 binding.