Symptoms and Complications of Crohn's Disease
- Symptoms: abdominal pain, diarrhea (including bloody diarrhea), fever, weight loss, abdominal distension
- Complications: anemia, skin rashes (infections, pyoderma gangrenosum, erythema nodosum), arthritis, inflammation of the eye, fatigue
- Extraintestinal complications: ulcerative colitis, nutrient deficiency, higher risk of colon cancer, iritis/uveitis, primary sclerosing cholangitis, ankylosing spondylitis, pyoderma gangrenosum, erythema nodosum
Causes and Risk Factors of Crohn's Disease
- Combination of environmental, immune, and bacterial factors
- Genetic susceptibility (more than 70 genes involved)
- Increased risk for smokers
- Possible association with gastroenteritis
- Similar symptoms to irritable bowel syndrome and Behçet's disease
Treatment and Management of Crohn's Disease
- No known cure
- Symptom management and maintenance of remission
- Corticosteroids for short-term improvement
- Medications like methotrexate or thiopurine for prevention of recurrence
- Smoking cessation recommended
Epidemiology and Impact of Crohn's Disease
- Prevalence of 3.2 per 1,000 people in Europe and North America
- Less common in Asia and Africa
- Increasing rates in the developing world since the 1970s
- 47,400 deaths in 2015 due to inflammatory bowel disease
- Slightly reduced life expectancy for individuals with Crohn's disease
Manifestations and Complications of Crohn's Disease in Various Organ Systems
- Extraintestinal manifestations: visual manifestations (uveitis, conjunctivitis, etc.), gallbladder and liver involvement (increased risk of gallstones, primary sclerosing cholangitis, etc.), renal and urological manifestations (nephrolithiasis, obstructive uropathy, etc.), pancreatic, cardiovascular, respiratory, musculoskeletal, and dermatological manifestations
- Intestinal damage: obstruction, fistulae, abscesses, intestinal stenosis, intestinal granulomas
- Increased risk of cancer: small intestinal cancer, colon cancer
- Major complications: bowel obstruction, abscesses, free perforation, hemorrhage, malnutrition, need for oral supplements or total parenteral nutrition
- Dermatological manifestations: erythema nodosum, pyoderma gangrenosum, clubbing deformity of the fingers, psoriasis, rare manifestations
- Neurological and psychological complications: seizures, stroke, myopathy, peripheral neuropathy, headache, depression, convulsions, meningitis, association with psychological disorders and poor self-image
Note: The content has been organized into 5 comprehensive groups, combining identical concepts and keeping facts, statistics, and detailed points.
Crohn's disease is a type of inflammatory bowel disease (IBD) that may affect any segment of the gastrointestinal tract. Symptoms often include abdominal pain, diarrhea, fever, abdominal distension, and weight loss. Complications outside of the gastrointestinal tract may include anemia, skin rashes, arthritis, inflammation of the eye, and fatigue. The skin rashes may be due to infections as well as pyoderma gangrenosum or erythema nodosum. Bowel obstruction may occur as a complication of chronic inflammation, and those with the disease are at greater risk of colon cancer and small bowel cancer.
| Crohn's disease | |
|---|---|
| Other names | Crohn disease, Crohn syndrome, granulomatous enteritis, regional enteritis, Leśniowski-Crohn disease |
 | |
| The three most common sites of intestinal involvement in Crohn's disease (left) compared to the areas affected by ulcerative colitis (colitis ulcerosa, right) | |
| Specialty | Gastroenterology |
| Symptoms | Abdominal pain, diarrhea (may be bloody), fever, weight loss, fatigue, mouth sores, reduced appetite |
| Complications | Anemia, skin rashes, arthritis, bowel cancer |
| Usual onset | 20 to 30 |
| Duration | Long term |
| Risk factors | Tobacco smoking |
| Diagnostic method | Biopsy, medical imaging |
| Differential diagnosis | Irritable bowel syndrome, celiac disease, Behçet's disease, nonsteroidal anti-inflammatory drug enteropathy, intestinal tuberculosis |
| Medication | Corticosteroids, biological therapy, immunosuppressants such as azathioprine, methotrexate |
| Prognosis | Slightly increased risk of death |
| Frequency | 3.2 per 1,000 (developed world) |
| Named after | |
Although the precise causes of Crohn's disease (CD) are unknown, it is believed to be caused by a combination of environmental, immune, and bacterial factors in genetically susceptible individuals. It results in a chronic inflammatory disorder, in which the body's immune system defends the gastrointestinal tract, possibly targeting microbial antigens. While Crohn's is an immune-related disease, it does not appear to be an autoimmune disease (the immune system is not triggered by the body itself). The exact underlying immune problem is not clear; however, it may be an immunodeficiency state.
About half of the overall risk is related to genetics, with more than 70 genes involved. Tobacco smokers are three times as likely to develop Crohn's disease as nonsmokers. It often begins after gastroenteritis. Other conditions with similar symptoms include irritable bowel syndrome and Behçet's disease.
There is no known cure for Crohn's disease. Treatment options are intended to help with symptoms, maintain remission, and prevent relapse. In those newly diagnosed, a corticosteroid may be used for a brief period of time to rapidly improve symptoms, alongside another medication such as either methotrexate or a thiopurine used to prevent recurrence. Cessation of smoking is recommended for people with Crohn's disease. One in five people with the disease is admitted to the hospital each year, and half of those with the disease will require surgery at some point over a ten-year period. While surgery should be used as little as possible, it is necessary to address some abscesses, certain bowel obstructions, and cancers. Checking for bowel cancer via colonoscopy is recommended every few years, starting eight years after the disease has begun.
Crohn's disease affects about 3.2 per 1,000 people in Europe and North America; it is less common in Asia and Africa. It has historically been more common in the developed world. Rates have, however, been increasing, particularly in the developing world, since the 1970s. Inflammatory bowel disease resulted in 47,400 deaths in 2015, and those with Crohn's disease have a slightly reduced life expectancy. It tends to start in adolescence and young adulthood, though it can occur at any age. Males and females are equally affected.
