RT Journal Article SR Electronic T1 Brain tumour mimics and chameleons JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 359 OP 371 DO 10.1136/practneurol-2013-000652 VO 13 IS 6 A1 David Bradley A1 Jeremy Rees YR 2013 UL http://pn.bmj.com/content/13/6/359.abstract AB The timely diagnosis of a brain tumour is crucial to optimising outcome in a group of patients with limited survival. Several common neurological conditions mimic brain tumours, causing concern to patient and physician until the correct diagnosis becomes clear. In addition, atypical presentations of brain tumours may cause diagnostic confusion, acting as chameleons and delaying correct workup and treatment. This review focuses on the important mimics and chameleons encountered in clinical practice, aiming to illustrate the wide range of clinical neurology encountered in this specialty and to provide guidance on reaching the correct diagnosis.