large tumors on the colon wall in colorectal cancer closeup view 3d

abdominal acid advanced alcohol biopsy bloating bowel cancer cell cells chemotherapy chronic colon colorectal designer detection diarrhea diet dividing early endoscopy erosion esophagus gastritis gastrointestinal gastroscopic helicobacter ibs illustration immune immunotherapy infection inflammation metastatic mucosa oncologist oncology operation painful perforation peritonitis pilori polyp radiotherapy rectal rectum spread stress surgery system treatment tumor ulcer ulcera