Ulcerative colitis

At a Glance

Ulcerative colitis is an inflammatory bowel disease characterized by inflammation and ulcers in the rectum and the inner lining of the colon.

Representative features include abdominal pain and diarrhea mixed with blood or pus, and rectal bleeding may be accompanied.

How the disease works

The exact cause has not been determined, but a familial tendency is known.

It is understood that an abnormal immune response to the intestinal mucosa, along with intestinal environment and genetic factors, together sustain the inflammation.

Variations in presentation among individuals

The course and response to treatment may vary depending on the age of onset, extent of lesions, severity of inflammation, environmental factors such as smoking, drugs, and infection, and comorbidities.

The broad framework of diagnosis and management

Symptoms range from mild diarrhea to severe bleeding and systemic symptoms, and periods of remission where symptoms disappear may alternate with exacerbations; anemia, fatigue, weight loss, loss of appetite, skin lesions, joint pain, and growth delay in children may occur.

Diagnosis is made by comprehensively integrating medical history and physical examination with blood tests, stool tests, colonoscopy or flexible sigmoidoscopy, and imaging studies when necessary.

Current status of treatment

It is difficult to confirm the diagnosis with a single test; endoscopic and histological findings must be interpreted in conjunction with the clinical course while excluding similar diseases such as infectious colitis, Crohn's disease, and ischemic bowel disease.

Management involves adjusting inflammation and symptom control, maintaining remission, managing nutrition and anemia, and monitoring for complications, tailored to the individual's extent of lesions and severity.

Various types of drugs are used for disease control; in cases not controlled by medication or that are very severe, colectomy may be considered. Specific selection requires individual evaluation.

How to read clinical trials

ClinicalTrials.gov contains records of interventional studies associated with this disease, but such registration alone cannot be used to determine treatment efficacy, safety, approval status, or whether it constitutes standard care.

Points to verify during clinical consultations

In clinical practice, one can check bowel movement frequency, bloody stools, weight and nutritional status, fever and pain, current medications and side effects, previous endoscopy/test results, skin/joint symptoms, pregnancy plans, and emergency warning signs.