What is celiac disease?

Celiac disease is a digestive disease that damages the small intestine and interferes with absorption of nutrients from food. People who have celiac disease cannot tolerate a protein called gluten, found in wheat, rye, and barley. Gluten is found mainly in foods, but is also found in products we use every day, such as stamp and envelope adhesive, medicines, and vitamins.

When people with celiac disease eat foods or use products containing gluten, their immune system responds by damaging the small intestine. The tiny, fingerlike protrusions lining the small intestine are damaged or destroyed. Called villi, they normally allow nutrients from food to be absorbed into the bloodstream. Without healthy villi, a person becomes malnourished, regardless of the quantity of food eaten.

Because the body's own immune system causes the damage, celiac disease is considered an autoimmune disorder. However, it is also classified as a disease of malabsorption because nutrients are not absorbed. Celiac disease is also known as celiac sprue, nontropical sprue, and gluten-sensitive enteropathy.

Celiac disease is a genetic disease, meaning it runs in families. Sometimes the disease is triggered-or becomes active for the first time-after surgery, pregnancy, childbirth, viral infection, or severe emotional stress.

What are the symptoms of celiac disease?
Celiac disease affects people differently. Symptoms may occur in the digestive system, or in other parts of the body. For example, one person might have diarrhea and abdominal pain, while another person may be irritable or depressed. In fact, irritability is one of the most common symptoms in children.

Symptoms of celiac disease may include one or more of the following:

gas
recurring abdominal bloating and pain
chronic diarrhea
constipation
pale, foul-smelling, or fatty stool
weight loss / weight gain
fatigue
unexplained anemia (a low count of red blood cells causing fatigue)
bone or joint pain
osteoporosis, osteopenia
behavioral changes
tingling numbness in the legs (from nerve damage)
muscle cramps
seizures
missed menstrual periods (often because of excessive weight loss)
infertility, recurrent miscarriage
delayed growth
failure to thrive in infants
pale sores inside the mouth, called aphthous ulcers
tooth discoloration or loss of enamel
itchy skin rash called dermatitis herpetiformis

A person with celiac disease may have no symptoms. People without symptoms are still at risk for the complications of celiac disease, including malnutrition. The longer a person goes undiagnosed and untreated, the greater the chance of developing malnutrition and other complications. Anemia, delayed growth, and weight loss are signs of malnutrition: The body is just not getting enough nutrients.

Malnutrition is a serious problem for children because they need adequate nutrition to develop properly.

What are the complications of celiac disease?
Damage to the small intestine and the resulting nutrient absorption problems put a person with celiac disease at risk for malnutrition and anemia as well as several diseases and health problems.

Lymphoma and adenocarcinoma are cancers that can develop in the intestine.

Osteoporosis is a condition in which the bones become weak, brittle, and prone to breaking. Poor calcium absorption contributes to osteoporosis.

Miscarriage and congenital malformation of the baby, such as neural tube defects, are risks for pregnant women with untreated celiac disease because of nutrient absorption problems.

Short stature refers to being significantly under-the-average height. Short stature results when childhood celiac disease prevents nutrient absorption during the years when nutrition is critical to a child's normal growth and development. Children who are diagnosed and treated before their growth stops may have a catch-up period.

This webpage contains general information about celiac disease, some of which may not be completely accurate. The best people for advice about diagnosing and treating celiac disease are one's doctor and dietitian.

Source: National Digestive Diseases Information Clearinghouse