Revision 2 for 'WHO criteria in tumor response'All Revisions
Who criteria in tumor repsonse
The WHO criteria introduced the concept of assessing tumor burden on the basis of the sum of the products of diameters (SPD) (ie, longest overall tumor diameter and longest diameter perpendicular to the longest overall diameter) and determining response to therapy by evaluating the changes from baseline during treatment.
No lesions detected for at least 4 weeks
- ≥50% decrease in sum of the products of diameters (SPD) (confirmed at 4 weeks)
- ≥25% increase in SPD in one or more lesions
- New lesions
- None of the above