Chronic pancreatitis is a persistent fibroinflammatory disease of the pancreas, more common in smokers or alcoholics. Genetic predisposition with mutations in various genes has also been documented. It typically presents with recurrent abdominal pain and endocrine and exocrine dysfunction, potentially progressing to pancreatic cancer and severe complications in later stages. In Chile, an annual incidence of 0.8 cases per 100,000 inhabitants is estimated, with a prevalence of 6.1 cases per 100,000 inhabitants. Early diagnosis is a current challenge for which endosonography has emerged as a sensitive and specific diagnostic tool, especially with the implementation of the Rosemont classification. Various studies have validated the utility of this classification. However, the limited availability of endosonography in some countries, such as Chile, establishes challenges for generalizing its application. It is expected that in the future, the Rosemont classification will become a standard for the diagnosis of chronic pancreatitis.