A comprehensive review and update on ulcerative colitis.

Area of Science:

• Gastroenterology
• Immunology
• Colorectal Diseases

Background:

• Ulcerative colitis (UC) is a chronic idiopathic inflammatory bowel disorder characterized by continuous mucosal inflammation of the colon.
• It presents with a relapsing and remitting course, affecting individuals worldwide with a bimodal age distribution.
• Key risk factors include genetics, environmental influences, autoimmunity, and gut microbiota composition.

Purpose of the Study:

• To provide a comprehensive overview of Ulcerative Colitis (UC), including its epidemiology, clinical presentation, diagnostic methods, and treatment strategies.
• To emphasize the importance of accurate diagnosis, disease extent, and severity assessment for patient management and prognosis.
• To outline current therapeutic approaches for inducing and maintaining remission in UC patients.

Main Methods:

• Diagnosis is established through a combination of clinical symptoms, endoscopic findings (ileocolonoscopy with biopsy), and histopathology.
• Characteristic endoscopic findings include continuous colonic inflammation with erythema, erosions, and ulcerations.
• Histopathology reveals decreased crypt density, architectural distortion, and diffuse transmucosal inflammation, crucial for definitive diagnosis and severity assessment.

Main Results:

• Ileocolonoscopy with biopsy is the definitive diagnostic tool for UC, revealing characteristic inflammatory patterns.
• Histopathology confirms UC diagnosis, assesses disease severity, and screens for dysplasia or cancer.
• Abdominal CT scans in acute cases show hallmark mural thickening (mean 8 mm).

Conclusions:

• Accurate diagnosis and assessment of UC extent and severity are critical for guiding treatment and predicting prognosis.
• Treatment goals include improving quality of life, achieving steroid-free remission, and minimizing cancer risk.
• Therapeutic strategies range from topical 5-ASA for proctitis to systemic treatments and surgery for severe or refractory cases.