The following is from a talk given at the Gluten Intolerance Group Annual Educational Seminar on April 1, 1995 by Dr. Alessio Fasano, Pediatric Gastroenterologist, University of Maryland School of Medicine which was also reported in the May 1995 issue of the GIG Newsletter. The findings of these experts indicate that the incidence of celiac disease in the general population could be as high as 1 in 300-500 people when one takes into account all forms of the disease. Here is a report of the meeting:
Two cities in Europe - Malmo, Sweden and Copenhagen, Denmark, which lie only 20 miles apart, seem to have a large difference in the incidence of celiac disease. In Malmo, the incidence was 1 in 500 people, which is quite high, while in Copenhagen it was 1 out of 11,000, which is much lower. Keep in mind that these figures represent only those patients whose celiac disease had been clinically diagnosed by a small intestinal biopsy.
There are three major ways in which celiac disease presents itself in patients. The first are the asymptomatic patients who have no symptoms whatsoever, but exhibit damage to their small intestines upon examination. The second are patients with the latent form which means they have blood-tested positive for celiac disease, nut no tissue damage has occurred yet. This form will later develop into the typical or atypical forms. The third is the typical presentation, which shows up when the patient is between 6 and 18 months old. These patients develop the classic symptoms: diarrhea, fatty stools, lack of weight gain, irritability and anorexia. Typical presentations of celiac disease are rather rare in comparison to the other forms, which leads to the overall under-diagnosis of celiac disease, and is illustrated by the following statistics:
Classical (Typical) Form
1 in 2500
|Atypical - Late Onset Form||1 in 1500|
|Asymptomatic Form||1 in 1000|
|Latent Form (celiac disease Associated with other Diseases)||1 in 300-500*|
*Researchers in Italy have reached the conclusion that the incidence of celiac disease would be more like 1 person with celiac sprue for every 300 to 500 in the general population, when looking at all forms of the disease.
Serological screening using anti-gliadin and anti-endomysial antibodies allows doctors to obtain a much more accurate picture of the actual number of people affected by celiac disease. In Europe, for example, researchers have found a much higher incidence of celiac disease than expected (1 in 300!), and it is spread uniformly throughout the population. Researchers re-tested the cities of Malmo and Copenhagen and found the incidence in Copenhagen to be 1 in 300. The difference between the two cities is in the clinical presentation of the disease. In Denmark there were more people who exhibited symptoms of osteoporosis, dermatitis herpetiformis, short stature and other atypical presentations. The awareness of physicians that these presentations could be celiac disease was very low.
The next question discussed at the meeting was: What is the true incidence of celiac disease in the United States? The researchers believe that the recently discovered antibody markers will help in answering this question. According to them, we should soon be able to tell whether the low estimates for celiac disease in the US are fact, or if atypical presentations of celiac disease have been overlooked, thus resulting in the extraordinary low level of diagnosed celiacs. A study conducted at the University of Maryland looked at 159 children with atypical symptoms (short stature, poor weight gain, chronic diarrhea, abdominal pain, asymptomatic relatives of celiacs).
The following chart summarizes the study:
Study: 159 Children With Atypical Symptoms*
|Symptom Group||No. Screened||Positive Screen||Negative Screen|
|Poor weight gain||21||6||15|
*Please keep in mind that this study was not based on a random cross-section of the population, but, rather on children who already exhibited atypical symptoms.
It is crucial to make the correct diagnosis, and to keep even asymptomatic people free of gluten . This is due to the associated morbidity, such as chronic ill health. With regard to the pediatric population, permanent stunted growth may result from a misdiagnosis. If the physicians fail to make a timely diagnosis, there is no time for catch-up growth, and the individual may be short forever. The same is true with skeletal disorders such as osteoporosis. Everyone with celiac sprue who experiences osteoporosis must place a certain amount of blame on the physician for not diagnosing celiac disease in time to prevent such demineralization.