FOLH1 and metastatic malignant neoplasm in the lymph nodes: Fifty-five 68Ga-PSMA avid lymph node metastases outside the abdomen and pelvis were identified in 29 studies (7%), including the mediastinum (n = 25, 45%), the cervical, supra- and infra-clavicular regions (n = 17, 31%), the axillae (n = 4, 7%) and additional thoracic sites (retro-pectoral, internal mammary, retro-crural; n = 9, 16%).