Helen was 82. She'd survived both breast cancer and outlived her husband.
One summer day she began bleeding from her colon and was admitted to the hospital. We assumed the worst — another cancer. But after she endured a series of scans and being poked with scopes, we figured out that she had an abnormal jumble of blood vessels called an arteriovenous malformation in the wall of her colon.
The finding surprised us, but the solution was clear: Surgery to remove that part of her colon should stop the bleeding once and for all. The operation went well. But afterward Helen's lungs filled with fluid from congestive heart failure. Then she caught pneumonia and had to be put on a ventilator in the intensive care unit.
Her medical problems and our treatments had simply stressed her aging organs beyond their capability.