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[Masked autoimmune polyendocrine syndrome caused by sequelae of diabetes mellitus].

BACKGROUND
In most cases Type I diabetes is immunologically mediated. Complications after long duration of the disease are commonly observed. Further autoimmune mediated diseases are rare, but more often diagnosed in diabetics than in the general population. The combination of 2 autoimmune endocrinopathies is subsumed under the term autoimmune polyendocrine syndrome (APS). Depending on the endocrine gland involved disorders are classified as APS Type I, II or III.


CASE REPORT
We report on a 64-year-old diabetic patient presenting with repeated nightly hypoglycemia. Diabetes was first diagnosed 12 years before. Clinical examination revealed a café-au-lait like color of the skin and severe peripheral polyneuropathy. Surprisingly, laboratory testing revealed a hemoglobin concentration of 6.8 g/dl. Further examinations led to the diagnosis of pernicious anemia and funicular myelosis. Screening for potentially associated autoimmune diseases showed also features of autoimmune thyroid disease.


CONCLUSION
Despite of late manifestation of disease Type I diabetes should be considered if the clinical features correspond to an autoimmune induced disorder. Associated autoimmunopathies have always to be considered. Early diagnosis of commonly with diabetes associated autoimmunopathies can prevent as severe manifestations of disease as reported in this case.