FOLH1 and metastatic malignant neoplasm in the lymph nodes: Although some of literature have shown that [99mTc]Tc-PSMA SPECT/CT for prostate cancer bone metastasis and lymph node metastasis has good prospects, we were unable to study these aspects in this analysis due to the limited number of literature and extractable data that can be collected [13, 18, 43–45].