RT Journal Article SR Electronic T1 Histiocytosis for the neurologist: a case of Erdheim–Chester disease JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 319 OP 323 DO 10.1136/practneurol-2012-000266 VO 12 IS 5 A1 Selvarajah, Johann R A1 Rodrigues, Mary Greta A1 Ali, Sara YR 2012 UL http://pn.bmj.com/content/12/5/319.abstract AB The histiocytoses are a rare but diverse group of disorders, ranging from localised, self-limiting lesions to disseminated, fulminant, multi-system disease. Some histiocytoses may cause or present with neurological disease and their recognition can be challenging. We illustrate this with a case, followed by a discussion of the clinical characteristics and management of the more common histiocytoses that may present to the neurologist.