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The man was 23 when the delusions came on. He became convinced that his thoughts were leaking out of his head and that other people could hear them. When he watched television, he thought the actors were signaling him, trying to communicate. He became irritable and anxious and couldn’t sleep. Dr. Tsuyoshi Miyaoka, a psychiatrist treating him at the Shimane University School of Medicine in Japan, eventually diagnosed

The thymus is a pinkish-gray organ that sits just below the sternum. It functions as a school for your immune system’s T cells, creating them from blood stem cells, then educating them to seek and destroy infections such as viruses, bacteria and fungi as well as cancer cells. But the thymus naturally shrinks throughout life, and that largely corresponds with the body’s declining ability to fight off pathogens. Resear

Some of the disparity in the risk from BRCA mutations is generational. One repeated finding is that, by age 50, mutation carriers born in the early twentieth century seem to have a lower risk of cancer than those born later3. The pattern suggests that outside influences interact with genes, and that something in the environment has changed in an unfavourable way. If researchers can figure out what those influences ar