specifies whether the first suspiciouos enhancing lesion mentioned in the radiological report is tumor or benign tumor/benign outcome was determined from biopsy\surgery pathological resultsbenign cases that were not sent for biopsy were determined as benign only if there was a followup of at least 1 year  similarly - the columns indicating tumor/benign for the second lesion is named tumor/benign2 and so on... 