[Diabetes, hypothyroidism and celiac disease in Down's syndrome. A case report].

It is well known that Down's syndrome patients frequently suffer from immune system diseases leading to the production of autoantibodies and the onset of correlated pathologies. These disorders become increasingly frequent as the patients grow older and the onset of one autoimmune disease often predisposes the development of others. Autoimmune thyroiditis is the most frequent disorder and appears to affect 39% of adult patients. Over the past years a number of reports have been published regarding the coexistence of various autoimmune diseases in DS patients, but little is still known about the relationship between these pathologies and celiac disease. In order to contribute to knowledge regarding the prevalence of this association, the authors report a case of a DS patient who developed diabetes mellitus, hypothyroidism and celiac disease at different times. This case provides further confirmation of the association between Down's syndrome and autoimmune pathologies. The authors feel that follow-up programmes for DS patients should include an evaluation of thyroid function and antithyroid antibodies given that the onset of glandular hypofunction may be very subtle. Furthermore, they should also include tests to assay glycemia, anti-pancreatic insula and anti-insulin antibodies for diabetes and AGA and EMA for celiac disease.