An atypical form of a coeliac disease, with the predominance of others then gastrointestinal symptoms, is increasingly recognized in adult patients. Atypical symptoms includes: hypochromic anaemia, electrolytic disturbance, neurological symptoms, osteopenia, osteoporosis and others. The report presents a case of a 34-year-old male admitted to the Department of Internal Diseases, Connective Tissue Diseases and Geriatrics in Gdansk, due to a severe hypocalcaemia (4.92 mg/dl). The coeliac disease was diagnosed based on the clinical course, serologic tests and on the histopathological exam of the small intestine sample. The implementation of the gluten free-diet resulted in a significant clinical improvement of patient’s condition. Early diagnosis and implementation of the glutenfree diet are crucial for regaining a normal functioning and decreasing the risk of severe complications
