A 52-year-old woman with headache, ataxia and loss of consciousness

Department of Neurosurgery, Royal Prince Alfred Hospital, Missenden Rd, Camperdown, New South Wales, 2050, Australia Department of Radiology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia Department of Diagnostic Oncology and Tissue Pathology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia Brain and Mind Research Institute, University of Sydney, Camperdown, New South Wales, Australia