RT Journal Article SR Electronic T1 Central nervous system graft-versus-host disease (CNS-GvHD) after allogeneic haematopoietic stem cell transplantation JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr-2017-221840 DO 10.1136/bcr-2017-221840 VO 2018 A1 Karolina Polchlopek Blasiak A1 Federico Simonetta A1 Maria-Isabel Vargas A1 Yves Chalandon YR 2018 UL http://casereports.bmj.com/content/2018/bcr-2017-221840.abstract AB A 60-year-old man presented with impaired consciousness and psychomotor agitation after a second allogeneic haematopoietic stem cell transplantation (HSCT) from a matched unrelated donor for acute myeloid leukaemia. Clinical, biological and radiological evidence suggested a diagnosis of central nervous system graft-versus-host disease (CNS-GvHD). After intrathecal infusion of methylprednisolone, the clinical symptoms as well as the radiological abnormalities disappeared. The present report illustrates the difficulties in the diagnosis and the management of CNS-GvHD, a very rare and still challenging neurological complication that can occur after allogeneic HSCT.