umls-concept:C0376495 | skos:definition | MSH: The therapy of the same disease in a patient, with the same agent or procedure repeated after initial treatment, or with an additional or alternate measure or follow-up. It does not include therapy which requires more than one administration of a therapeutic agent or regimen. Retreatment is often used with reference to a different modality when the original one was inadequate, harmful, or unsuccessful.,NCI: The repeated act of the dispensing, applying, or tendering of something to another after an initial treatment. | lld:umls |