patients with type 1 diabetes mellitus have a high prevalence of coeliac disease, symptoms of which are often mild, atypical, or absent. untreated coeliac disease is associated with an increased risk of malignancy, particularly of lymphoma. therefore, we report a 9-year-old girl with coeliac disease, diabetes type 1 and selective iga deficiency. a 9-year-old female patient presented in august 2...