[Usefulness and predictive value of PSA density, adjusted by transition zone volume, in men with PSA levels between 2 and 4 ng/ml].

Objective: To assess the diagnostic significance of prostate-specific antigen (PSA), density (PSAD) accuracy, and PSAD adjusted by transition zone volume (PSATZD) in men with PSA levels between 2.0 and 4.0 ng/ml.

Headache rate and cost of care following lumbar puncture at a single tertiary care hospital.

Background: American Academy of Neurology guidelines recommend the use of noncutting needles because of lower rates of headache following lumbar puncture in randomized trials. We sought to determine the rate of headache using cutting needles and the potential cost savings of switching to noncutting needles.

Methods: We retrospectively reviewed the charts of all patients who had a lumbar puncture in the outpatient neurology clinic at a single institution between January 2004 and December 2005.