PT - JOURNAL ARTICLE AU - Kaoru Yagita AU - Akiyo Shinde AU - Toshihiko Suenaga TI - Rheumatoid meningitis can present MRI findings that mimic chronic subdural haematoma AID - 10.1136/bcr-2019-229642 DP - 2019 Aug 01 TA - BMJ Case Reports PG - e229642 VI - 12 IP - 8 4099 - http://casereports.bmj.com/content/12/8/e229642.short 4100 - http://casereports.bmj.com/content/12/8/e229642.full SO - BMJ Case Reports2019 Aug 01; 12 AB - A 65-year-old woman with long-standing rheumatoid arthritis (RA) experienced a recurrent tingling sensation in her left arm followed by aphasia and a tingling sensation in her right arm. A subsequent imaging study showed bilateral subdural fluid accumulation and we initially diagnosed her with a transient ischaemic attack and chronic subdural haematoma (CSDH). The cerebral spinal fluid study revealed an inflammatory response without any indications of infection or malignant tumours. After a meningeal biopsy, we redefined the diagnosis to rheumatoid meningitis (RM), and the patient showed remarkable improvement with prednisolone administration. RM should be considered as an alternative diagnosis when examining central nervous system diseases in patients with RA, as RM presents a highly variable clinical picture with image findings similar to those of CSDH.