The correlation between [68Ga]Ga-NOTA-T4 uptake value and definite Trop2 expression, as well as the differential diagnostic value of [68Ga]Ga-NOTA-T4 immunoPET in inflammatory conditions and cancers/lymph node metastases, are being thoroughly investigated in our ongoing clinical trials. Here, TACSTD2 is linked to metastatic malignant neoplasm in the lymph nodes.