Intraoperative Electron Radiation Therapy (IOERT) in the management of locally recurrent rectal cancer

BMC Cancer

Table 1 Patient and treatment characteristics

Patient characteristics	n	%		n	%
Age at FD (yrs)			Prior RT
Median	56		yes	43	44
Min	30		no	54	56
Max	74		Median dose (Gy)	50
Age at IORT (yrs)			Distant metastasis prior to IORT
Age at IORT (yrs)			Distant metastasis prior to IORT
Median	60		History of resected metastasis	13	13
Min	31		Resection during present surgery	5	5
max	78		both	2	2
			none	77	79
Time FD to IORT (mo)
Median	30		Type of present surgery
Min	5		AR	21	22
Max	181		APR	38	39
			Pelvic exenteration/bone resection	32	33
Gender			other	6	6
Male	59	61
Female	38	39	Resection Status (present surgery)
			R0	36	37
No. of recurrence			R1	32	33
First	83	86	R2	29	30
Multiple	14	14
			EBRT in relation to present surgery
T stage at FD			Neoadjuvant RT	6	6
T1	6	6	Neoadjuvant RCHT	40	41
T2	28	29	Adjuvant RT	0	0
T3	57	59	Adjuvant RCHT	8	8
T4	5	5	none	43	44
unknown	2	2
			Adjuvant CHT
N stage at FD			Yes	33	34
N0	54	56	No	64	66
N+	41	42
unknown	2	2	IORT dose (Gy)
			<10	1	1
M stage at FD			10	32	33
M0	92	95	12	18	19
M1 (all resected)	5	5	15	35	36
			18	8	8
UICC stage at FD			20	3	3
I	28	29
II	25	26	IORT electron energy (MeV)
III	37	38	Median	8
IV	5	5	Min	6
Unknown	2	2	Max	18
Type of primary surgery			IORT cone size (cm)
AR	65	67	Median	6.5
APR	27	28	Min	5
Local excision	5	5	Max	10

n: number of patients, %: percentage, FD: first diagnosis, yrs: years, Min: minimum, Max: maximum, IORT: intraoperative radiation therapy, mo: Months, No.: number, UICC: Union internationale contre le cancer, RT: radiotherapy, AR: anterior resection, APR: abdominoperineal resection, R0: complete resection without microscopic residual disease, R1: microscopic residual disease, R2: gross residual disease, EBRT: external beam radiation therapy, RCHT: radiochemotherapy, CHT: chemotherapy, Gy: Gray, MeV: mega electron volts, cm: centimeter.

ISSN: 1471-2407