[Multidisciplinary diagnostic approach to Fahr's syndrome, a familial disease (author's transl)].

Fahr's syndrome is characterized by idiopathic non-arteriosclerotic, symmetric, intracerebral vascular sclerosis. On the basis of relevant literature and our own research, the necessity of multidisciplinary diagnosis is reviewed: psychiatric, neurological, medical, paediatric and radiological approaches are discussed. The early onset of diverse psychological alterations is regarded as significant. Extensive diagnosis seems justified by the at least theoretically possible means of prophylaxis and treatment in cases of Fahr's syndrome associated with hypoparathyroidism, pseudo-hypoparathyroidism and pseudo-pseudo-hypoparathyroidism. This condition otherwise irreversibly leads to dementia.