Prelude Corp. (dba Preludedx) reported positive results from the SweDCIS randomized trial showing its DCISionrt test predicts radiation benefit for lowering 10-year local invasive breast cancer risk. The prognostic, artificial intelligence (AI)-based tool assesses and predicts the benefit of radiotherapy for women with ductal carcinoma in situ (DCIS) following breast-conserving surgery (BCS).