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Table 1 Patient and treatment characteristics

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

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
  1. 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.