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.
Our aim was to investigate the occurrence of clinical and subclinical autoimmune thyroid disease in 79 patients with celiac disease as reflected in thyroid function, antibodies, and ultrasound. Since subclinical thyroid diseases are common in the population, 184 nonceliac controls were also studied. Normal thyroid function combined with positive antibodies and marked hypoechogenicity was considered subclinical disease. Autoimmune thyroid disease was observed in 13.9% of celiac patients and in 2.1% of controls (P = 0.0005); and subclinical disease in 10.1% and 3.3%, respectively (P = 0.048). The mean thyroid gland volume was 8.3 ml in celiac patients and 10.4 ml in controls (P = 0.007). Hypoechogenicity was found in 73% of celiac patients and in 42% of controls (P < 0.0001). Positive thyroid antibodies were associated with hypoechogenicity in celiac patients but not in controls. In conclusion, the occurrence of both clinical and subclinical autoimmune thyroid disease was increased in celiac disease; subclinical thyroid disease indicates regular surveillance.
Coeliac disease does not always respond properly to a gluten-free diet, and treatment may be complicated by an underlying autoimmune endocrine disorder. We report three cases of hypopituitarism in patients with coeliac disease who seemed to have incomplete dietary response. The first patient had diabetes and suffered from hypoglygaemic events; the second had muscular atrophy of unknown origin while the third had growth failure. None had a pituitary mass, suggesting that hypopituitarism was of autoimmune origin. Overall condition improved only after replacement therapy for the underlying hormone deficiency; this association should thus be recognized.
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