Early prediction of histopathological response of rectal tumors after one week of preoperative radiochemotherapy using 18 F-FDG PET-CT imaging. A prospective clinical study

Table 3 Individual patients’ metabolic and histopathological responses

Patient Number	SUV-MAX baseline	SUV-MAX week 1	Absolute difference (ΔSUV-MAX)	Relative difference ΔSUV-MAX%))	TRG	Presence of pCR
1	17.6	12	−5.6	−31.82	III	no
2 *	42	23	−19	−45.24	IV	no
3	21.3	19.4	−1.9	−8.92	I	yes
4	17	13	−4	−23.53	III	no
5	16.7	9.5	−7.2	−43.11	I	yes
6	17.8	13.5	−4.3	−24.16	III	no
7	13	18.5	5.5	42.31	II	no
8	15.2	15.2	0	0.00	II	no
9	20	13.4	−6.6	−33.00	IV	no
10	56	37.9	−18.1	−32.32	I	yes
11	23	26	3	13.04	III	no
12	28	36	8	28.57	III	no
13	18.2	15.4	−2.8	−15.38	III	no
14	16.9	13.7	−3.2	−18.93	III	no
15	11.9	9.7	−2.2	−18.49	IV	no
16	8.9	6.2	−2.7	−30.34	IV	no
17	7.5	13.9	6.4	85.33	IV	no
18	15.2	12.4	−2.8	−18.42	III	no
19	24.6	25	0.4	1.63	III	no
20	9.4	5.8	−3.6	−38.30	I	yes

Abbreviations: SUV-MAX - maximum standardized uptake value, pCR – pathological complete response.
* Patient was removed from per – protocol analysis because of delayed operation.

ISSN: 1748-717X