Crohn's disease
Introduction:
Crohn's
disease is a chronic inflammatory bowel disease that causes ongoing
inflammation of the intestinal tract. It is similar to ulcerative
colitis, another inflammatory bowel disease. But ulcerative colitis
usually is confined to the innermost layer of the large intestine and
rectum. Crohn's disease can occur anywhere in the intestine, often in
patches surrounded by healthy tissue, and can spread deeper into the
tissues. Symptoms include chronic bloody or watery diarrhea, abdominal
pain, fever, and loss of appetite. Symptoms tend to come and go, with
the disease becoming active or going into remission several times during
the person's lifetime.
Crohn's
disease can cause intestinal obstructions, ulcers (most often in the
lower part of the small intestine, the large intestine, or the rectum),
fistulas (hollow passages from one part of the intestine to another),
and anal fissures (a crack in the anus or the skin around the anus that
can lead to infection). In addition, people with Crohn's disease are at
risk of malnutrition, because their intestine cannot absorb all the
nutrients they need from their diet.
Crohn's
disease affects 2 - 7 out of 100,000 people and researchers believe
that these numbers are growing. It develops mostly between the ages of
20 - 40, although children and older adults may also develop the
condition. There is no cure for Crohn's disease. Medication and diets
can help control the condition and sometimes bring about long term
remission. Some people with Crohn's disease will require surgery to
remove part of the digestive tract at some point in their lives.
However, surgery does not cure the disease.
Signs and Symptoms:
The most common signs and symptoms of Crohn's disease are diarrhea and abdominal pain. Symptoms can range from mild to severe.
- Diarrhea (with or without blood)
- Abdominal pain and bloating
- Fatigue
- Poor appetite
- Weight loss
- Fever
- Nausea and vomiting
- Floating stools (caused by poor digestion of fat)
Crohn's
disease can also be associated with other medical conditions, including
arthritis, osteoporosis, eye infections, blood clots, liver disease,
and skin rashes.
What Causes It?:
No
one is sure what causes Crohn's disease. Theories include a faulty
immune system response triggered by bacteria or a virus; genetics, since
about a quarter of people who have Crohn's disease also have a close
relative with the disease; and a diet high in saturated fat and
processed foods, since Crohn's disease is more common in the developed
world. Most likely, several factors may be involved.
Risk Factors:
- Being of Jewish heritage (3 - 6 times more likely than the general population)
- Being of European (particularly Scandinavian) ancestry
- Family history of inflammatory bowel disease
- Cigarette smoking
- Living in an industrialized country (particularly an urban area)
- Eating a diet high in sugar and saturated fat and low in fruit and vegetables
What to Expect at Your Provider's Office:
Your
doctor will perform a thorough physical exam, as well as a series of
tests to diagnose Crohn's disease. Blood tests may show anemia (due to a
significant loss of blood) and a high white blood cell count (a sign of
inflammation somewhere in the body). Stool samples may show whether
there is bleeding or infection in the colon or rectum.
The
following procedures may help your doctor distinguish between
ulcerative colitis, Crohn's disease, and other inflammatory conditions.
- Colonoscopy and sigmoidoscopy -- In a colonoscopy, a long, flexible, lighted tube with a camera is used to take pictures of the colon. These pictures can reveal any inflammation, bleeding, or ulcers along the entire colon wall. The patient is sedated during the procedure. A sigmoidoscopy is similar but is used to examine the rectum and lower part of your colon. It can be done without sedation, but may miss inflammation higher in the colon or the small intestine.
- Capsule endoscopy -- In this test, you swallow a small capsule with a camera in it, and the camera takes pictures as it passes through the length of your digestive tract. The capsule then passes out of the body through your stool. The test is generally safe, but if there is an intestinal obstruction the capsule may become trapped. Your doctor will run other tests to make sure you do not have an obstruction before doing this procedure.
- Barium enema -- This procedure looks at the large intestine with an x-ray. It involves being given barium (a dye) as an enema, which coats the lining of your large intestine and rectum. It is generally not as reliable as a colonoscopy.
- CT scans -- This imaging technique allows your doctor to look at the entire intestine and can help find intestinal obstructions or fistulas.
Preventive Care:
Although
there is no known way to prevent Crohn's disease, people can usually
manage the condition with medication, diet, and lifestyle changes.
Exercise can help prevent the stress and depression that often accompany
Crohn's disease, and quitting smoking can reduce symptoms. Eating a
diet rich in fruit and vegetables can also help ease symptoms.
Treatment Options:
The
primary goal in treating Crohn's disease is to control acute flares of
the disease and to maintain remission for as long as possible. The
specific type of treatment often depends on how severe the symptoms are.
For example, people with mild to moderate symptoms are usually treated
with medications that reduce swelling and suppress the immune system.
More severe cases may require surgery.
Many
people with inflammatory bowel diseases use complementary and
alternative remedies in addition to prescription medications.
Preliminary studies suggest that lifestyle changes, dietary adjustments
(such as eating a rich variety of fruits and vegetables and avoiding
saturated fat and sugar), and specific herbs and supplements may be
useful additions to treatment.
Lifestyle
Stress
Many
people with Crohn's disease report that stress makes their symptoms
worse. Relaxation techniques and mind/body exercises, such as yoga, tai
chi, and meditation, are worth considering, particularly when used with
other forms of treatment. In addition, studies suggest that hypnosis may
improve immune function, increase relaxation, decrease stress, and ease
feelings of anxiety.
Exercise
Exercise
helps people with Crohn's disease, both in terms of maintaining health
and reducing stress. Exercise is considered safe for people with Crohn's
disease, but anyone with a chronic illness should talk to their doctor
before starting a new exercise or fitness regimen. It is especially
important for people with Crohn's disease to drink water before and
during exercise to prevent dehydration. Avoid extreme changes in body
temperature during exercise.
Smoking
Cigarette
smoking is a risk factor for Crohn's disease and studies have shown
that it may worsen symptoms. If you smoke, you should quit. Ask your
doctor for help.
Drug Therapies
Although
medications cannot cure Crohn's disease, they can reduce symptoms and
help you control your condition. Sometimes, they can bring on remission
of the disease for a while. Medications commonly used to treat Crohn's
disease include:
- Sulfasalazine (Azulfidine) -- An older drug that reduces inflammation during acute flare ups and is usually taken with folic acid. Side effects include abdominal discomfort, nausea, and lowered sperm count. Sulfasalazine can be effective, but newer drugs are available.
- Mesalamine (Asacol, Rowasa) -- This drug reduces inflammation during acute flare ups and helps prevent recurrences. It generally has fewer side effects that sulfasalazine.
- Corticosteroids (such as budesonide, prednisone, and prednisolone) -- These drugs can reduce inflammation throughout your body but have many side effects, including acne, and an increased risk of infection, osteoporosis, high blood pressure, excessive hair growth, diabetes, and disorders of the eye including glaucoma and cataracts. Budesonide (Entocort) may have fewer side effects. Corticosteroids also suppress your body's production of the hormone cortisol and cannot be stopped abruptly. They are not for long term use, but may be used to control flares.
- Immune system suppressors -- These medications decrease inflammation by suppressing the immune system. They are sometimes used in combination with steroids to reduce the dose of the steroid medication. These drugs can take several months to work, and all may have significant side effects. Drugs include azathioprine (Imuran), methotrexate (Rheumatrex), infliximab (Remicade), adalimumab (Humira), certolizumab pegol (Cimzia), natalizumab (Tysabri), and cyclosporine.
- Antibiotics -- Antibiotics may be prescribed to help treat fistulas and ulcers. Ciproflaxin (Cipro) and metronidazole (Flagyl) are most commonly used.
- Antidiarrheal medications (such as diphenoxylate, loperamide, or psyllium) -- Medications used to treat diarrhea must be used only under your doctor's supervision and with extreme caution. They can slow down the normal movements of the gastrointestinal tract and, in severe cases, may cause a life threatening complication known as toxic megacolon.
Surgical Procedures
Although
surgery will not cure Crohn's disease, 3 - 4people with the condition
will eventually have resections (parts of their colons removed) to close
fistulas or to remove a severely damaged part of the intestine. In some
cases, laparoscopic surgery (which uses a smaller incision) can be
done, leading to fewer complications and shorter hospital stays.
Strictureplasty, in which a balloon is inserted into the intestine and
expanded, is sometimes done when the intestine has become too narrow
from scar tissue.
Complementary and Alternative Therapies
People
with Crohn's disease often cannot absorb all the nutrients their bodies
need, due to damage in the intestine. Or abdominal pain and nausea may
make it hard for them to eat. Some medications may also lower important
nutrients in the body. For example, sulfasalazine reduces the body's
ability to absorb folate, and corticosteroids can reduce calcium levels.
Making sure you get enough nutrients is a crucial part of treating
Crohn's disease. People with significant malnourishment, severe
symptoms, or those awaiting surgery may require parenteral (intravenous)
nutrition.
Nutrition
Although
diet cannot cause or cure Crohn's disease, some studies suggest that
people who eat foods high in saturated fat and sugar or who eat
processed foods may be more likely to develop the disease. Certain foods
may also reduce symptoms and make recurrences of the disease less
likely.
- Eating fruits and vegetables, lowering fat, and eliminating sugar may reduce the risk of developing Crohn's disease. Although a low fiber diet is one of the risk factors for developing Crohn's disease, some people with Crohn's disease find that fiber makes symptoms worse. If fiber bothers you, steam or bake your vegetables rather than eating them raw, and avoid high fiber fruits, such as apples.
- Certain foods may aggravate symptoms of Crohn's disease – most often, dairy products, fats, and spicy foods. People with Crohn's disease may want to avoid these foods.
- Eat antioxidant foods, including fruits (such as blueberries, cherries, and tomatoes) and vegetables (such as squash and bell peppers).
- Eat foods high in B vitamins, calcium, and magnesium, such as whole grains (if not bothered by fiber), dark leafy greens (such as spinach and kale), and sea vegetables.
- Avoid refined foods such as white breads and pastas.
- Eat 5 - 6 smalls a day.
- Avoid caffeine, alcohol, and tobacco.
- If symptoms are severe, an elemental diet may be recommended. Elemental formulas are liquid diets that contain only the basic building blocks of food and do not need to be broken down into smaller substances along the digestive tract. Some people find it hard to stick to an elemental diet, but after a period of time, often other foods can be reintroduced. One study suggests that adding omega-3 fatty acids to an elemental diet may boost its nutritional content and make it more likely that people with Crohn's disease will stick with it. Elemental diets should only be undertaking under the supervision of a physician.
Vitamins and Minerals
Because
of decreased appetite, malabsorption, chronic diarrhea, side effects of
medication, and surgical removal of parts of the intestine, many people
with Crohn's disease don't get enough of some vitamins and minerals. In
particular, people with Crohn's disease may lack adequate vitamin D,
B12, and K, plus folic acid, calcium, and zinc. Your doctor may
recommend that you take a multivitamin daily.
- Zinc (25 mg), folic acid (800 mcg), vitamin B12 (800 mcg) -- The body uses these vitamins and minerals to repair cells in the intestine. In addition, drugs such as sulfasalazine and methotrexate may cause levels of folic acid in the body to drop, so that you need a supplement. Getting too much Zinc can be immunosuppressive, folic acid in high doses over long periods of time has had some controversial reports associating it with certain illnesses. Speak with your doctor to determine the proper type and level of supplementation for your individual case.
- Vitamin D (1,000 IU per day) -- is necessary to maintain strong bones. People with Crohn's disease, especially those who take corticosteroids, often have low levels of vitamin D and are at risk for osteoporosis.
- Calcium (1,000 - 1,200 mg per day) -- is also needed for strong bones. Ask your doctor if you need a calcium supplement.
- Omega-3 fatty acids, such as those found in fish oil (2.7 g per day) -- may help fight inflammation and reduce the chances of recurrence, but studies have been mixed. The study with the most positive results used a special type of fish oil – "enteric coated free fatty acid form" – that is not sold commercially. Some researchers suggest that measuring the blood levels of different types of fatty acids may help determine if fish oil would be useful. Do not take high doses of a fish oil supplement if you take blood thinning medication.
- Probiotics, especially Saccharomyces boulardi (250 mg 3 times per day to 500 mg 4 times per day) -- One small study indicated that this type of "friendly" bacteria helped people with Crohn's disease reduce the incidence of diarrhea. However, other studies have shown mixed results. People with allergies to yeast should avoid Saccharomyces boulardi. People with very weak immune system should check with their doctor before using probiotics.
- N-acetyl glucosamine (NAG) -- Preliminary research suggests that N-acetyl glucosamine supplements or enemas may improve symptoms of inflammatory bowel disease, but more studies are needed to know whether glucosamine would have any effect on Crohn's disease. There is some concern that NAG may raise blood sugar in patients with diabetes and may worsen asthma symptoms. NAG may interact with blood thinning medications, such as Warfarin (Coumadin) and certain cancer drugs.
- Glutamine (400 mg 4 times per day) -- is an amino acid found in the body that that helps the intestine function properly. While there is no evidence that glutamine specifically helps reduce symptoms of Crohn's disease, it may be good for overall intestinal health. Glutamine is best taken on an empty stomach. Do not take glutamine is you are diabetic or have seizures suffer from bouts of mania, severe liver disease with difficulty thinking or confusion, or if you are sensitive to monosodium glutamate (MSG).
Herbs
Because
of the presence of inflammation and the nature of the disease, Crohn's
disease should not be treated with herbs alone. However, herbs may be a
useful complement to traditional medical treatment. Remember that herbs
can trigger side effects and interact with other herbs, supplements, or
medications. For these reasons, you should take herbs with care, under
the supervision of a health care provider.
The
evidence for using herbs to treat Crohn's disease is mostly lacking.
Among the herbs that have been used traditionally to treat inflammation
within the digestive tract are:
- Slippery elm (Ulmus fulva) is a demulcent (a substance that protects irritated tissues and promotes their healing). Take 60 - 320 mg per day. One tsp. powder may be mixed with water and drunk 3 - 4 times a day. Take slippery elm at least one hour after taking other medications.
- Marshmallow (Althaea officinalis) is a demulcent and emollient (a substance that soothes mucous membranes). Drink one cup of tea 3 times per day. To make tea, steep 2 - 5 g of dried leaf or 5 g dried root in one cup boiling water. Strain and cool. Avoid marshmallow if you have diabetes. Marshmallow may interact with lithium. It may also interfere with drugs taken by mouth. Take Marshmallow at least one hour after taking oral medications.
- Curcumin or turmeric (Curcuma longa, 1 - 2 g per day) -- shows anti-inflammatory properties in test tubes. One small study found that people with inflammatory bowel disease who took curcumin reduce their symptoms and their need for medications. But the study was preliminary, and more evidence is needed. Curcumin may make gallbladder illnesses worse and may interact with blood thinning medications.
- Cat's claw (Uncaria tomentosa, 250 mg per day) may help fight inflammation. Cat's claw may make leukemia, as well as autoimmune disorders, worse, and may worsen low blood pressure.
- Boswellia (Boswellia serrata, 1,200 mg 3 times per day for up to 8 weeks) has anti-inflammatory properties, and a few small studies suggest that it may help in treating Crohn's disease. However, more research is needed to be sure. Boswellia may interact with other drugs and supplements, so talk to your doctor before taking it.
Homeopathy
Although
few studies have examined the effectiveness of specific homeopathic
therapies, professional homeopaths may consider the following remedies
for the treatment of Crohn's disease symptoms (such as diarrhea) based
on their knowledge and experience. Before prescribing a remedy,
homeopaths take into account a person's constitutional type -- your
physical, emotional, and psychological makeup. An experienced homeopath
assesses all of these factors when determining the most appropriate
treatment for each person.
- Mercurius -- for foul smelling diarrhea that may have streaks of blood accompanied by a sensation of incomplete emptying. This remedy is most appropriate for individuals who tend to feel exhausted following bowel movements, experience fluctuations in body temperature, perspire frequently, and have a thirst for cold fluids.
- Podophyllum -- for explosive, gushing, painless diarrhea that worsens after eating or drinking. Exhaustion often follows bowel movements, and the individuals for whom this remedy is appropriate may experience painful cramps in the lower legs and feet.
- Veratrum album -- for profuse, watery diarrhea accompanied by stomach cramps, bloated abdomen, vomiting, exhaustion, and chills. The diarrhea tends to worsen as a result of eating fruit. The individual for whom this therapy is appropriate tends to crave cold liquids.
Acupuncture
Acupuncture
has long been used in Traditional Chinese Medicine to treat
inflammatory bowel disease. One study in Germany found that acupuncture
and moxibustion were effective specifically for treating Crohn's
disease. Acupuncturists treat people with inflammatory bowel disease
based on an individualized assessment of the excesses and deficiencies
of qi located in various meridians. Moxibustion (a technique in which
the herb mugwort is burned over specific acupuncture points) is
sometimes used because it is thought by some to reach deeper into the
body than using needles alone.
Other Considerations:
Pregnancy
Women
who are in remission at the time of conception generally have normal
pregnancies and healthy babies. However, women with active disease are
more prone to miscarriages, spontaneous abortions, and stillbirths.
Symptoms often get worse during pregnancy. For this reason, women with
active Crohn's disease who are or wish to become pregnant should
continue medications under the guidance of their doctor. Pregnant women
should avoid high doses of vitamins. An obstetrician and/or a
nutritionally oriented physician can provide instructions about taking
multivitamins during pregnancy and while breastfeeding. Specifically,
the herbs cat's claw (Uncaria tomentosa) and turmeric (Curcuma longa)
should never be used while breastfeeding, but any herb or supplement
should only be used by a nursing mother under the guidance of her
physician.
Prognosis and Complications
A number of complications can develop from Crohn's disease. Many can be treated successfully.
- Narrowing of the colon, which may cause obstruction
- Perforation of the colon
- Abscesses (pus filled pockets of infection) in the colon
- Toxic megacolon (swollen colon that may rupture)
- Fistulas (abnormal hollow passages that lead from one part of the intestine to another, or to other organs)
- Infection of the blood (sepsis)
- Colon cancer
- Nutritional problems (including weight loss and reduced muscle mass)
- Joint pain and arthritis
- Osteoporosis (bone loss)
- Gallstones
- Eye infections/inflammation
- Mouth ulcers, gum inflammation, and dental cavities
- Liver damage
- Blood clots
- Depression and anxiety
- Anemia
Although
there is no cure for Crohn's disease, many people with the disease lead
active lives by controlling their symptoms with medication. Over time,
however, Crohn's disease is less responsive to treatment. It is
estimated that 75% of people with Crohn's disease will eventually
undergo surgery. About 30% of people who have had surgery for Crohn's
disease will require another operation for recurrence within 5 years. In
general, morbidity and mortality rates are higher for people who have
Crohn's disease compared to the unaffected population.
Alternative Names:
Inflammatory bowel disease - Crohn's
- Reviewed last on: 12/31/2010
- Steven D. Ehrlich, NMD, Solutions Acupuncture, a private practice specializing in complementary and alternative medicine, Phoenix, AZ. Review provided by VeriMed Healthcare Network.
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