The drugs don't work : a modern medical scandal - "The doctors prescribing the drugs don't know they don't do what they're meant to. Nor do their patients. The manufacturers know full well, but they're not telling."
The Checklist - "If a new drug were as effective at saving lives as Peter Pronovost’s checklist, there would be a nationwide marketing campaign urging doctors to use it" [single page]
What's the Trouble? - "How Doctors Think"
Dictionary of Disorder - shaping the DSM
Obesity and Diabetes - another free supplement by Nature
Psychiatry by Prescription - Do psychotropic drugs blur the boundaries between illness and health?
Nature has a somewhat technical but free supplement on stem cells (alongwith a podcast and related blog).
Living with half a brain - hemispherectomy, probably the most radical procedure in neurosurgery
Interactive Autopsy [Flash]
Surgical Eyes - source of info about complications and their treatment from Lasik and other vision correction surgeries.