Preoperative Combined RadioChemo-Molecular Target Therapy With Capecitabine, Bevacizumab, and Radiotherapy

Inclusion Criteria:

* age: 18 - 80
* bioptical confirmed adenocarcinoma of the rectum in T3NxM0 status. The tumor has to be basically surgically complete resectable (-\>R0).
* no former chemotherapy, radiotherapy of pelvis or abdomen and/or tumor resection of rectum carcinoma
* WHO performance status 0-2
* adequate bone marrow reserve (granulocytes \>= 3.000/µl, absolute neutrophil \>= 0 1,5 x 10 9/l thrombocytes: \>= 100.000/µl, haemoglobin \>= 10g/dl)
* adequate hepatic function (Bilirubin: \<= 1.5 x ULN, GOT und GPT \<= 2.5 x ULN)
* adequate renal function (creatinin: \<= 1.25 mg/dl, creatinin-clearance: \> 50 ml/min (Cockcroft and Gault formula)), proteinuria: dipstick \< 2+. In case of dipstick \> 2+ protein has to be measured in 24h urine and does not exceed more than 1g/24h)
* ability of intake of pills
* women of childbearing potential: exclusion of pregnancy (negative urin or serum pregnancy test)
* willingness of women of childbearing potential and accordingly of potent men to use approved contraceptives (e.g. birth-control pill, loop, condom) during and at least 3 month after conclusion of the study
* life expectancy of at least 3 month
* INR and aPTT \< 1.5 ULN
* signed Informed Consent before recruitment

Exclusion Criteria:

* failure of one inclusion criteria
* former radiotherapy of pelvis or abdomen
* former chemotherapy
* any other kind of malign tumor in the last 5 years
* any other kind of tumour in the last 5 years with exception of basal cell carcinoma of skin and cervix carcinoma in situ
* general contraindication or known hypersensitivity against Bevacizumab and/or Capecitabine
* non malign disease, if there is a contraindication with radiotherapy, or chemotherapy with Bevacizumab and Capecitabine, or a resection of rectum: uncontrolled hypertension (systolic \> 150 mmHG and/or diastolic \>100 mmHG) or clinical significant (e.g. active) cardiovascular disease: CVA (cardiovascular accident)/ cerebral apoplexy (\< 6 months before recruitment), myocardial infarct (\< 6 months before recruitment), instable angina pectoris, CHF with NYHA status II or higher, or treated serious arrhythmia, hepatic disease, significant neurologic or psychiatric disorders
* florid, serious infections at the time of recruitment
* peripheral neuropathy (NCI CTC \>= Grade 1)
* legally limited contractual capability or evidence of neurological or psychiatric disease, if it will constrict the patients compliance in the opinion of the investigator
* evidence of lacking cooperation of the patient
* major intervention within 28 days before recruitment, open wounds
* serious injuries, unhealed wounds or fractures
* patients with spinal compressions or metastases in central nervous system
* evidence of bleeding diathesis or coagulation dysfunction
* actual intake of anticoagulant or thrombolytic agents, Aspirin \> 325 mg/d or within 10 days before study start)
* actual or recent (within 10 days before recruitment) therapeutic therapy with fully-dosed anticoagulants. A prophylactic treatment is permitted.
* previous thromboembolic or hemorrhagic events within the last 6 months before recruitment
* previous abdominal fistulas, GI perforation or intra-abdominal abscess within the last 6 months
* treatment with other study medication within 28 days before recruitment
* patients with malabsorption syndrome or difficulties swallowing
* pregnant or breast feeding women