Table 2. Treatment characteristics.

	Primary resection	Additional resections*	Radicality of resection	Interval between primary resection and HIPEC (weeks)	Interval between primary resection and adjuvant chemotherapy (weeks)	Adjuvant chemotherapy **
1	Right hemicolectomy	Partial small bowel, abdominal wall	R1	6	10	4 x CAPOX4x capecitabin monotherapy
2	Proctocolectomy	Omental metastasis	R0	4	10	12 x FOLFOX
3	Subtotal colectomy	Omentum	R0	3	7	5 x CAPOX, 3x capecitabin monotherapy
4	Right hemicoloectomy	Omental metastasis, psoas muscle	R1	7	10	12 x FOLFOX
5	Low anterior resection	Hysterectomy, bilateral sapingectomy, ileocecal resection, omentectomy	R0	3	10	8x CAPOX
6	Subtotal colectomy	No	R0	6	8	8 x CAPOX
7	Low anterior resection	Partial small bowel, abdominal wall	R0	6	8	8x CAPOX
8	Right hemicolectomy	Omental metastasis	R0	9	NA	Refused adjuvant systemic treatment
9	Right hemicolectomy	No	R0	6	12	6x FOLFOX
10	Low anterior resection	Ovarian metastasis	R1	4	8	8x CAPOX
				Median (range): 6(3-9)	Median (range): 10(7-12)

CAPOX: combined schedule of capecitabin and oxaliplatin (standard 8 cycles); HIPEC = hyperthermic intraperitoneal chemotherapy; FOLFOX: combined schedule of 5-fluoruracil and oxaliplatin (standard 12 cycles); NA: not applicable; R0: microscopic complete tumour resection with all margins > 1mm; R1: microscopic margin involvement or margin ≤1mm.

*Additional resections, either of adjacent organs/structures because of suspected tumour ingrowth, or additional resections of metastases. ** Number of cycles and chemotherapeutic scheme.