Decreased iron levels in the temporal cortex in postmortem human brains with Parkinson disease.

Yu et al.(1) reported that iron levels in the temporal cortex were reduced in patients with Parkinson disease (PD) compared with age-matched controls. They also determined that patients with Alzheimer disease (AD) had no change in iron levels in the temporal cortex. We would like to know whether Yu et al.(1) included any patients with memory disturbance in this study.