Patient: K. Age 50MaleDiagnosis: Diverticular disease, diverticulitis and paracolic abscess (Hinchey 1b) Complaints: abdominal pain, difficulty in passing gas and stool, temperature - 37.5 CColonoscopy: in sigmoid colon – stenosis 80 mm, a fistula - 42 mmCT: wall thickening up to 8 mm, extraintestinal infiltration behind the sigmoid colon and in front of the rectosigmoid junction.