What is the clinical features of crohn disease?

 Clinical Features of Crohn’s Disease

Crohn’s disease is a chronic inflammatory condition of the gastrointestinal (GI) tract, and its clinical features vary depending on the site, severity, and extent of the disease. The presentation may be gradual or acute, with both intestinal and extraintestinal symptoms.

Clinical Features of Crohn’s Disease


1. Gastrointestinal (Intestinal) Symptoms

Symptom Description
Chronic diarrhea Often watery, may contain mucus or blood (especially if the colon is involved)
Abdominal pain Usually crampy and localized in the right lower quadrant (ileum area)
Weight loss Due to malabsorption and reduced intake
Fever Especially during flare-ups
Fatigue From chronic inflammation and anemia
Nausea and vomiting If the upper GI tract or small bowel is involved
Tenesmus Feeling of incomplete bowel evacuation (common with rectal involvement)
Rectal bleeding Less common than in ulcerative colitis but may occur
Fistulas Abnormal connections between bowel loops or with skin, bladder, vagina, etc.
Perianal disease Skin tags, fissures, abscesses, and fistulas around the anus
Bowel obstruction Due to strictures or inflammation

2. Extraintestinal Manifestations

These are systemic signs and symptoms that affect other organs and are common in Crohn’s disease.

🔹 Musculoskeletal

  • Arthritis (peripheral or axial)

  • Sacroiliitis

  • Ankylosing spondylitis

🔹 Dermatological

  • Erythema nodosum (painful red nodules, usually on shins)

  • Pyoderma gangrenosum (ulcerating skin lesions)

🔹 Ocular

  • Uveitis

  • Episcleritis

  • Conjunctivitis

🔹 Hepatobiliary

  • Fatty liver

  • Primary sclerosing cholangitis (rare)

  • Cholelithiasis (gallstones)

🔹 Nutritional Deficiencies

Due to malabsorption, especially in small bowel disease:

  • Iron deficiency anemia

  • Vitamin B12 deficiency

  • Folate deficiency

  • Vitamin D and calcium deficiency risk of osteoporosis

3. Pediatric Features (in children and adolescents)

  • Growth retardation

  • Delayed puberty

  • Weight loss or failure to thrive

  • Behavioral changes due to chronic illness

4. Disease Course and Patterns

Crohn’s disease typically follows a relapsing and remitting course, meaning

  • Periods of active disease (flare-ups) alternate with remission

  • Flare-ups may be triggered by stress, infection, or medication non-compliance

 Important Note:

  • The location of the disease influences the symptoms:

    • Ileal disease → weight loss, B12 deficiency

    • Colonic disease → bloody diarrhea

    • Perianal disease → fistulas, abscesses


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