In this research project the investigators intend to find out if Endoscopic Ultrasound (EUS) criteria for diagnosing chronic pancreatitis can be correlated with pathologic characteristics of tissues taken from pancreas of patients with suspected chronic pancreatitis.

This will be a retrospective study which will examine results from biopsy specimens and endoscopic ultrasound findings in suspected chronic pancreatitis.

Inclusion Criteria:

• will include all patients who consented to have both EUS and had biopsy taken for tissue diagnosis.

Exclusion Criteria:

• Will exclude patients who are less than 18 years

Retrospective surgery cases who had chronic pancreatitis