Prevalence of Acute Hepatic Porphyria

Inclusion Criteria: * Man or woman aged 18 to 60; * Presenting severe abdominal pain, afebrile and diffuse over several days, evolving for less than 5 years; * With at least one of the following symptoms: * Peripheral neurological symptoms: decreased driving force and pain in the limbs (roots of the thighs), etc. ; * Central neurological symptoms: psychiatric (depression, anxiety, insomnia), disturbances of consciousness, etc. ; * Autonomous neurological symptoms: tachycardia, nausea, vomiting, constipation, etc. * With a first negative etiological assessment requested by an emergency physician, gastroenterologist, gynecologist, neurologist, internist or another specialty, or with a diagnosis of acute hepatic porphyria less than 6 months; * Patient able to understand the information related to the study and having indicated his non-objection to the collection of data concerning him; Exclusion Criteria: * Patient with a diagnosis of acute hepatic porphyria for more than 6 months; * Patient unfit to participate in the study, due to cognitive or linguistic difficulties; * Protected patient (under legal protection, or deprived of liberty by judicial or administrative decision).