RT Journal Article SR Electronic T1 Refractory CIDP with chronic lymphocytic leukaemia responding to chemoimmunotherapy JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP practneurol-2020-002672 DO 10.1136/practneurol-2020-002672 A1 Lewis, Dana A1 Osman, Chinar A1 Allen, David A1 Pinto, Ashwin Arnold A1 Duncombe, Andrew A1 Katifi, Haider A YR 2020 UL http://pn.bmj.com/content/early/2020/12/28/practneurol-2020-002672.abstract AB Chronic inflammatory demyelinating polyneuropathy (CIDP) has a variable clinical course with 15% remaining refractory to treatment. We report a woman with severe refractory CIDP and coexisting chronic lymphocytic leukaemia (CLL) who improved dramatically after chemoimmunotherapy appropriate for the CLL, including rituximab. A subsequent CIDP relapse after 15 months responded again to similar treatment, and the improvement has been maintained with 3-monthly rituximab infusions as sole ongoing therapy. The case suggests that CIDP refractory to conventional treatment may have associated pathology, in this case haematological malignancy, and that treating the malignancy can effectively treat the CIDP.