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A study published in February of 90,000 women over 25 questions the value of mammography in detecting breast cancer. Among the findings:

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Migraine headaches are severe enough to make you reach for anything that might bring relief. And that can lead to serious problems. The American Headache Society (AHS) recently issued recommendations of things NOT to do when diagnosing or treating migraines.

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Its symptoms suggest a number of ailments, but doctors have been diagnosing more cases of Chiari (pronounced kee-AH-ree) malformation — a condition where the brain intrudes on the spinal column. In this installment of KERA’s Vital Signs, Dr. Sabatino Bianco, a neurosurgeon with of Texas Health Arlington Memorial Hospital, talks about the two most common forms of Chiari.