[Severe osteomalacia in endemic sprue. An important differential diagnosis in osteoporosis].

A 67-year-old woman has a 20-year history of recurrent abdominal pain, diarrhea and diffuse bone pain. During the course of numerous hospitalisations the diagnoses "iron deficiency anemia", "iron absorption disorder", "osteoporosis" and "hyperparathyroidism" had been made. Despite treatment with vitamin D3, calcium, fluorides and iron, the patient's condition deteriorated to such a degree that she became in need of constant care. After 20 years of illness, nontropical sprue (celiac disease) with secondary intestinal osteopathy was identified. High-dose parenteral treatment with vitamin D3, oral calcium supplementation and a gluten-free diet resulted in an improvement of the patient's condition within three months, and the patient can now largely look after herself again.