The efficiency of 18F-FDG-PET/CT in the assessment of tumor response to preoperative chemoradiation therapy for locally recurrent rectal cancer

Table 4 CT and MRI evaluation of pathological grade

Response evaluation by CT				Response evaluation by MRI
		Pathological responder (TRG 1–2) N = 17	Pathological nonresponder (TRG 3–5) N = 23			Pathological responder (TRG 1–2) N = 17	Pathological nonresponder (TRG 3–5) N = 23
CR	(CT responder)	0	0	CR	(MRI responder)	1	1
PR	(CT responder)	2	3	PR	(MRI responder)	1	3
SD	(CT nonresponder)	11	15	SD	(MRI nonresponder)	11	17
PD	(CT nonresponder)	0	0	PD	(MRI nonresponder)	0	0
ND		4	5	ND		1	2

Abbreviations: CR complete response, PR, partial response, SD, stable disease, PD, progressive disease, ND, not determined, RTG, tumor regression grade

ISSN: 1471-2407