Diagnosis and classification of ulcerative colitis

Area of Science:

• Gastroenterology
• Immunology
• Internal Medicine

Background:

• Ulcerative colitis (UC) is a chronic inflammatory bowel disease (IBD) characterized by superficial mucosal ulceration, rectal bleeding, diarrhea, and abdominal pain.
• Unlike Crohn's disease (CrD), UC is confined to the colon with inflammation limited to the mucosal layer, typically affecting the colon continuously from the rectum proximally.
• Common extraintestinal manifestations include inflammatory arthropathies and primary sclerosing cholangitis (PSC).

Purpose of the Study:

• To summarize the key characteristics, diagnosis, and potential diagnostic aids for ulcerative colitis (UC).
• To differentiate UC from Crohn's disease (CrD) based on clinical and diagnostic features.
• To highlight the role of autoantibodies in the early diagnosis of UC.

Main Methods:

• Review of clinical, radiological, endoscopic, and histological features for UC diagnosis.
• Analysis of the role of autoantibodies, including antineutrophil cytoplasmic antibodies (ANCA) and anti-goblet cell antibodies (GAB).
• Comparison of UC characteristics with Crohn's disease (CrD).

Main Results:

• UC diagnosis relies on a combination of patient history, clinical presentation, and diagnostic imaging/procedures.
• Autoantibodies such as ANCA and GAB show potential utility in the early diagnosis of UC.
• These autoantibodies may assist in distinguishing UC from CrD.

Conclusions:

• Ulcerative colitis (UC) is a distinct form of inflammatory bowel disease (IBD) with specific colonic involvement.
• The aetiopathogenesis involves immune-mediated responses in genetically susceptible individuals.
• Autoantibodies (ANCA, GAB) offer valuable support for early UC diagnosis and differentiation from CrD.