Case report

Acute disseminated encephalomyelitis mimicking late CNS relapse of acute lymphoblastic leukaemia: case report

Ram Kumar¹ , Shobha Nijalingappa¹ , John Grainger² and Omar Ismayl¹

¹  Department of Paediatric Neurology, Royal Manchester Children's Hospital, Hospital Road, Manchester, UK

²  Department of Paediatric Haematology and Oncology, Royal Manchester Children's Hospital, Hospital Road, Manchester, UK

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Journal of Medical Case Reports 2007, 1:4doi:10.1186/1752-1947-1-4

Published:	9 February 2007

Abstract

Background

Acute encephalomyelopathy occurring after an allogeneic bone marrow transplant for leukaemia is a diagnostic emergency. The diagnosis can be challenging since there is a wide set of alternative diagnoses, including opportunistic infections and relapse of the leukaemia.

Case presentation

A 13-year old girl presented with a severe acute myelopathy and encephalopathy. She was in prolonged remission from a central nervous system and bone marrow relapse of an acute lymphoblastic leukaemia, treated with allogeneic bone marrow transplantation. Neuroimaging showed multifocal grey and white matter lesions of demyelinating appearance in the brain and entire spine. Immunophenotyping and cytogenetic investigations of the girl's cerebrospinal fluid lymphocytosis excluded a late central nervous system relapse of her leukaemia. The diagnosis was acute disseminated encephalomyelitis. With standard immunosuppressive therapy, the girl had early cerebral recovery but a prolonged period of recovery from her myelopathy.

Conclusion

Acute disseminated encephalomyelitis should be considered in the differential diagnosis of acute encephalomyelopathy after bone marrow transplantation for leukaemia. Demyelinating syndromes such as acute disseminated encephalomyelitis may be late sequelae of bone marrow transplantation.