. 2012 May 7;12(1):126–135. doi: 10.1102/1470-7330.2012.0013

Table 2.

Response criteria and modified CT criteria according to RECIST and Choi

Response	RECIST 1.1	Choi
PD	Increase of at least 20% and 5 mm in SLD	Increase of at least 10% in SLD and decrease of less than 15% in MLD^a
PD	New lesion(s)	New lesion(s)
Unequivocal progression of non-target lesion(s)	New or increasing nodule(s) within a mass
SD	Decrease of less than 30% and increase of less than 20% in SLD	Decrease of less than 10% and increase of less than 10% in SLD and decrease of less than 15% in MLD^a
PR	Decrease of at least 30% in SLD	Decrease of at least 10% in SLD and decrease of at least 15% in MLD^a
CR	Complete remission	Complete remission

PD, progressive disease; SD, stable disease; PR, partial complete response; CR, complete response; SLD, sum of the longest diameter according to RECIST^[⁹^]; MLD, mean lesion density according to modified CT criteria^[¹¹^].

^aComplementary recommendation of the German GIST Working Group: density changes should account for at least 10 HU.