active surveillance
noun[U]
medicalspecializeduk/ˌæk.tɪv səˈveɪ.ləns/us/ˌæk.tɪv sɚˈveɪ.ləns/a way oftreatingamedicalconditionthatinvolvesaperiodofwaitingandregulartesting,ratherthanimmediatetreatmentsuch assurgeryorchemotherapy
（医疗方面的）主动监测，积极监测，积极监察Compare
watchful waiting