A 71-year-old male is admitted with a history of
progressive confusion, difficulty in walking and incontinence of urine. On
examination he is found to be demented, he has gait apraxia, but there is no
abnormality of tone, power or reflexes, coordination is normal there is no
sensory abnormality. A CT scan shows dilated ventricles but no obstruction to
CSF flow. Lumbar puncture reveals normal pressure with normal microscopy and
biochemistry. Routine haematology and biochemistry are normal.
In this patient which of the following would help in
deciding further management?
Treponema pallidum haemagglutination titre
Glucose tolerance test
Reassessment after lumbar puncture and drainage of CSF