Some scientists say an immune condition called PANDAS affects as many as 1 in 200 children who have traits similar to those of autism. But many experts contest that figure — and even the condition’s very existence.

An immune molecule produced during a fever improves sociability in three mouse models of autism.

A new resource that details the ages at which children attain milestones such as speaking and walking could help clinicians spot autism sooner.

People with autism are at increased odds of having other psychiatric conditions, such as anxiety and depression, but the links can be counterintuitive.

The many genes implicated in Williams syndrome, a condition related to autism, may all work together to exert their effects on behavior.

Some cases of anxiety, which often accompanies autism, may stem from a faulty immune system, a new study suggests — but some experts are skeptical.

People with mutations in CHD8, a top autism gene, tend to be tall and have large heads.

Nearly one-third of autistic young people put themselves or others in danger in any given three-month period.

Understanding how gaze differs in autistic people may help improve their lives.

Extra copies of a gene called BOLA2 predispose people to autism and may protect against iron deficiency.