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A 60-year-old previously healthy woman sought medical attention at a memory clinic for subjective cognitive impairment. Neurological and cognitive testing was normal, except that she performed at the lower limit of normal in A Quick Test of Cognitive Speed (AQT) and Rey complex figure tests. MRI of the brain was normal. As a part of the investigation she underwent lumbar puncture, a routine procedure in memory investigations in Sweden.
The cerebrospinal fluid (CSF) was found to be yellow and viscous. The CSF flow through the lumbar …
Contributors NM drafted the paper. RM and AH managed the patient and collected clinical data. RM, AH, LM, KB and HZ revised the paper for intellectual content.
Competing interests None.
Ethics approval University of Gothenburg ethical committee.
Provenance and peer review Not commissioned. Externally peer reviewed. This paper was reviewed by Brendan McLean, Truro, UK.