Background:

Chronic idiopathic ulcerative colitis (CIUC) is a disease with multifactorial chronic inflammation of the colonic mucosa. In Mexico, there are studies that show an increase in the frequency of new cases. The purpose of this work was to identify possible changes in CIUC behavior in a referral hospital.

Methods:

New ulcerative colitis (UC) cases confirmed by histopathology from January 2007 to December 2014 were included.

Results:

A total of 189 patients were included. Mean number of UC annual new cases was 23.6. The study included 95 male patients (50 %) and 94 female patients (50 %), with an average age of 44.6 years at diagnosis. The frequency of pancolitis was 77 %, in comparison with 59 % in the previous period. Extra-intestinal manifestations (EIM) were present in 55.8 % and colectomies in 5.2 %.

Conclusion:

Some characteristics of the disease have changed over time: there is an increased frequency of pancolitis and EIM, as well as a decrease in the rate of colectomies.