Acute cholecystitis (AC) is the second most frequent pathology in Surgical Emergencies; laparoscopic cholecystectomy (LC) is the gold standard treatment, but not all patients are fit for surgery. Percutaneous Cholecystostomy (PC) is an alternative to LC but has high comorbidity. There is no protocol in our institution for Non-Surgical Treatment (NST). This study aims to analyse the complications of non-surgical treatment and a new local management algorithm

It's a single-centre retrospective study of 1652 adults with AC from 2011 to 2022, including baseline demographic characteristics, comorbidity severity defined as the Charlson Comorbidity Index (CCI), ASA Score, and Tokyo Guidelines' severity classification. The primary outcome is to study the complications of NST.

Inclusion Criteria:

• Diagnostic of an Acute Cholecystitis.
• Older than 18 years old.

Exclusion Criteria:

• Younger than 18 years old.

All patients admited with the diagnostic of Acute Cholecystitis