This version of the behavior recode variable does not assume that all cancers being processed were reportable to SEER at the time of diagnosis. It also accepts benign and borderline tumors for any sites and years. The primary function is to look at tumors that were originally coded in ICD-O-3 as malignant, but would not have been malignant according to ICD-O-2 coding, and set the behavior to "Only malignant in ICD-O-3". Tumors that were malignant in ICD-O-2, but are not considered malignant in ICD-O-3, should have already been converted to borderline by the ICD-O-2 to ICD-O-3 conversions.

This recode only uses primary site and ICD-O-3 histology and ICD-O-3 behavior. All tumors must be coded in ICD-O-3. If this is not the case, please run the ICD-O-2 to ICD-O-3 conversion first. The logic of the recode is as follows:

BehaviorRecode = ICD-O-3 Behavior
if Primary site = Urinary Bladder (C670-C679) and ICD-O-3 Behavior = In situ (2) then BehaviorRecode = malignant (3)
else if Histology ICD-O-3 = 9421 or 9422 and ICD-O-3 Behavior = borderline (1) then BehaviorRecode = malignant (3)
else if Year dx ≥ 2001 and ICD-O-3 Behavior = malignant and Primary Site = Lung and bronchus (C340-C349) and ICD-O-3 Histology = 9133 then BehaviorRecode = Only Malignant in ICD-O-3 (4)
else if Year dx ≥ 2001 and ICD-O-3 Behavior = malignant and ICD-O-3 Histology = (9393,9538,9950,9960,9961,9962,9980,9982,9983,9984,9985,9986,9987,9989) then BehaviorRecode = Only Malignant in ICD-O-3 (4)