[State of dementia due to intermittent acute porphyria: a case report].

Introduction: Porphyrias are rare inherited disorders due to specific enzyme abnormalities of heme biosynthesis. We can classify them as hepatic or erythropoïetic, the type depends on the organ in which the enzyme is deficient. Among the hepatic forms, three of them are clinically characterised by acute abdominal pain and neuropathy, sometimes associated with psychiatric disorders.

[Late-onset schizophrenia or chronic delusion].

Historical Aspects: Chronic delusion occurring late in life has essentially been studied by European psychiatrists. "Late-onset schizophrenia" was first described and defined by Manfred Bleuler in 1943, as a form of schizophrenia which occurs after the age of 40. Later, British psychiatrists often used the term "Late-onset paraphrenia" interchangeably with "Late-onset schizophrenia" to designate this disorder.