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Journal Article
Research Support, Non-U.S. Gov't
First-degree relatives are frequently affected in coeliac disease and dermatitis herpetiformis.
Scandinavian Journal of Gastroenterology 2002 January
BACKGROUND: Coeliac disease and dermatitis herpetiformis are phenotypically distinct gluten-sensitive diseases. Coeliac disease is known to cluster in families, whereas there is little evidence for dermatitis herpetiformis and for the occurrence of both diseases in the same families.
METHODS: The study group comprised 380 patients with coeliac disease and 281 patients with dermatitis herpetiformis, with a total of 3158 first-degree relatives, followed up for a mean of 14 years. The patients were questioned about affected first-degree relatives. The prevalence and incidence of biopsy-proven coeliac disease and dermatitis herpetiformis in relatives were determined.
RESULTS: Seventy-three (19.2%) patients with coeliac disease and 51 (18.1%) with dermatitis herpetiformis had affected first-degree relatives. The prevalence among relatives was similar for both diseases; 4.7% and 3.9% of the relatives had coeliac disease and 0.8% and 1.5% had dermatitis herpetiformis, respectively. The disease prevalence was 7% among siblings, 4.5% among parents and 3.5% among children. The annual incidence was 3/1,000 relatives, which is 15 times higher than among the general population. Coeliac disease and dermatitis herpetiformis were mixed in several multiple-case families.
CONCLUSIONS: The present long-term follow-up study of coeliac disease and dermatitis herpetiformis shows that every fifth patient can have affected first-degree relatives, and that the prevalence among relatives is 5.5%. Dermatitis herpetiformis segregates also in the families of patients with coeliac disease, and vice versa, indicating the same genetic background.
METHODS: The study group comprised 380 patients with coeliac disease and 281 patients with dermatitis herpetiformis, with a total of 3158 first-degree relatives, followed up for a mean of 14 years. The patients were questioned about affected first-degree relatives. The prevalence and incidence of biopsy-proven coeliac disease and dermatitis herpetiformis in relatives were determined.
RESULTS: Seventy-three (19.2%) patients with coeliac disease and 51 (18.1%) with dermatitis herpetiformis had affected first-degree relatives. The prevalence among relatives was similar for both diseases; 4.7% and 3.9% of the relatives had coeliac disease and 0.8% and 1.5% had dermatitis herpetiformis, respectively. The disease prevalence was 7% among siblings, 4.5% among parents and 3.5% among children. The annual incidence was 3/1,000 relatives, which is 15 times higher than among the general population. Coeliac disease and dermatitis herpetiformis were mixed in several multiple-case families.
CONCLUSIONS: The present long-term follow-up study of coeliac disease and dermatitis herpetiformis shows that every fifth patient can have affected first-degree relatives, and that the prevalence among relatives is 5.5%. Dermatitis herpetiformis segregates also in the families of patients with coeliac disease, and vice versa, indicating the same genetic background.
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