Original ArticlesThe Basis of Inborn Errors of Metabolism for NeuroradiologistsVairo, Filippo MD, MSc*†; Vedolin, Leonardo MD, PhD‡§Author Information From the *Medical Genetics Service, Hospital de Clínicas de Porto Alegre; †Post Graduation Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul; ‡Neuroradiology Service, Hospital Moinhos de Vento; and §Department of Internal Medicine, Universidade Federal do Rio Grande do Sul; Radiology Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil. Reprints: Leonardo Vedolin, MD, PhD, Hospital de Clinicas de Porto Alegre, Rua Ramiro Barcelos, 2350, Porto Alegre, RS, CEP: 90035-903(e-mail: firstname.lastname@example.org). The authors declare no conflict of interest. Topics in Magnetic Resonance Imaging: October 2011 - Volume 22 - Issue 5 - p 209-214 doi: 10.1097/RMR.0b013e31829689bd Buy Metrics Abstract Although relatively common together, inborn errors of metabolism (IEM) are individually rare, which makes difficult for most neuroradiologists to accumulate significant experience on these conditions. To facilitate the diagnostic approach, several schemes based on clinical, biochemical, genetic, and neuroimaging criteria have been proposed. Neuroimaging techniques have a great potential to improve diagnostic accuracy in as well as follow-up and management of the patients with an IEM. This article aimed to provide a nonexhaustive review of some basic information related to genetic conditions such as pattern of inheritance, penetrance, variable expressivity, genotype, phenotype and to provide information on how to classify, investigate, diagnose, and treat IEM besides highlighting some findings that would aid neuroradiologists to improve the diagnostic accuracy of imaging techniques, particularly magnetic resonance imaging. © 2011 Lippincott Williams & Wilkins, Inc.