Table 2.

Categories of the responses of non-measurable changes

Response category	Assessment of the sum of dimensions of non-measurable lesions
CR	Discontinuation of all non-measurable lesions. Short dimension of all occupied node counts < 10 mm. Normalization of the indicators of the tumour*
Non-CR and non-PD	Presence of unmeasurable changes and/or persistence of elevated concentration of the indicators of the tumour*
PD	The occurrence of a new lesion or unequivocal increase of unmeasurable lesions

CR – complete response, PD – progressive disease.

^*When the levels of indicators of the tumour are included in the evaluation of the response.