Aseptic meningitis is a recognised complication after posterior fossa surge
ry. It is often self limiting but occasionally runs a protracted course req
uiring repeated CSF examination to exclude infection, and treatment with sy
stemic steroids. A patient is described with aseptic meningitis after poste
rior fossa surgery who underwent posterior fossa re-exploration nearly 3 ye
ars after the initial operation. This disclosed a pseudomeningocele, which
was closed. The patient remains symptom free almost 2 years after closure.
In this case of chronic aseptic meningitis after posterior fossa surgery, c
losure of the pseudomeningocele found at exploratory surgery led to resolut
ion of the symptoms.