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Crohn's disease and UC (ulcerative colitis) are types of inflammatory bowel disease (IBD) that cause chronic inflammation of the digestive tract.
While symptoms of Crohn's disease and UC are similar, there are some differences between the two conditions.
- Crohn's disease can affect any part of the gastrointestinal tract from the mouth to the anus, while ulcerative colitis affects only the colon (large intestine)
- People who have Crohn's disease can have healthy parts of the intestine interspersed with the inflamed areas while ulcerative colitis is characterized by continuous inflammation of the colon
- Crohn's disease can affect all layers of the bowel walls while ulcerative colitis only affects the innermost lining of the colon
- In Crohn's disease, pain is felt throughout the entire abdomen while in ulcerative colitis, the pain is usually localized to the left side of the abdomen
One form of IBD is not necessarily “worse” than the other. It depends on each individual patient and the severity of their disease. Ulcerative colitis may sometimes be considered “worse” because severe UC may require surgery more often than Crohn’s.
What Are Symptoms of Crohn's Disease and UC?
Symptoms of Crohn's disease and UC (ulcerative colitis) that are similar include:
- Persistent diarrhea (may be bloody)
- Urgent need to have a bowel movement
- A feeling of incomplete bowel evacuation
- Rectal bleeding
- Abdominal cramps and pain
- Constipation (may lead to bowel obstruction)
- Weight loss
- Fatigue
- Fever
- Night sweats
- Bloating
- Loss of appetite
- Nausea
- Vomiting
Crohn’s disease can also cause symptoms in the body outside the GI tract, including:
- Eye problems such as redness, eye pain, or vision changes
- Mouth sores
- Joint pain and swelling
- Skin complications such as rash, sores, or bumps
- Changes in the menstrual cycle
- Osteoporosis
- Kidney stones
- Liver problems such as primary sclerosing cholangitis and cirrhosis (rare)
Additional symptoms of ulcerative colitis may include:
For both conditions, relapses, when inflammation and symptoms worsen (flares) can occur, followed by periods of remission that can last months to years when symptoms subside.
How Are Crohn's Disease and UC Diagnosed?
Crohn’s disease and UC (ulcerative colitis) are diagnosed with patient history and physical examination, along with tests that may include:
- Stool testing
- To rule out infection and parasites
- Calprotectin
- Blood tests
- Complete blood count (CBC)
- Iron studies
- C-reactive protein
- Sedimentation rate
- Kidney function
- Liver function tests
- X-rays of the upper and lower GI tract
- Barium enema X-ray
- Endoscopy
- Colonoscopy
- Upper endoscopy
- Sigmoidoscopy
- Video capsule endoscopy
- Small intestine imaging
- Fluoroscopic X-ray
- Computed tomography (CT) scan
- Magnetic resonance imaging (MRI) scan
- CT/MRI enterography
- Tissue biopsy
What Is the Treatment for Crohn's Disease and UC?
Treatment for Crohn’s disease and UC (ulcerative colitis) depends on the severity of the condition and how often a patient’s symptoms flare up (worsen). Treatment is aimed at reducing symptoms, inducing remission (which is a period without symptoms), and maintaining remission.
Medications used to treat Crohn’s disease and UC include:
- 5-aminosalicylic acids (5-ASAs)
- Systemic corticosteroids
- Topical corticosteroids
- Immunomodulators
- Biologic/Biosimilar Therapies
- Janus kinase inhibitors (JAK Inhibitors) for ulcerative colitis
- Antibiotics for Crohn’s disease
Diet changes used to manage Crohn’s disease and ulcerative colitis include:
- Maintain good nutrition
- Consume soft, bland foods during flares
- Avoid spicy or high-fiber foods during flares
- Restricting daily intake if you are lactose-intolerant
Surgery used to treat Crohn’s disease includes:
- Strictureplasty
- Proctocolectomy
- Colectomy
- Fistula removal
- Bowel resection
- Abscess drainage
Surgery for ulcerative colitis is a last resort for severe cases. Surgery usually involves removing the entire colon and the rectum, which is the only permanent cure for ulcerative colitis.
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https://www.uclahealth.org/gastro/ibd/ulcerative-colitis-vs-crohns-disease
https://www.uptodate.com/contents/ulcerative-colitis-beyond-the-basics?topicRef=15613&source=see_link
https://pubmed.ncbi.nlm.nih.gov/8613037/
https://www.crohnscolitisfoundation.org/
https://www.nhs.uk/conditions/ulcerative-colitis/treatment/