This is an observational multicenter study that will analyse the accuracy of inflammatory indexes as neutrophil-lymphocyte ratio and platelet-lymphocyte ratio, to predict the failure of conservative treatment of patients diagnosed of acute uncomplicated diverticulitis.

Inclusion Criteria:

• Patients older than 18, diagnosed of acute uncomplicated diverticulitis.
• Diagnosis made by CT or ultrasound

Exclusion Criteria:

• Patients younger than 18.
• Patients diagnosed of acute complicated diverticulitis

All patients over 18 years, diagnosed of acute uncomplicated diverticulitis