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Dear Dr. Roach: I have several symptoms of gluten intolerance. I鈥檝e read that there are tests to confirm celiac disease. Besides a blood test, one test is a biopsy of tissue taken from the small intestine.

Dear Dr. Roach: I am an 84-year-old woman in good health. I have been faithfully going to the gynecologist and having a mammogram every year.

Dear Dr. Roach: I was hospitalized this year with ulcerative colitis. While there, I was tested three times for C. diff, and all tests were negative. About a week or so later, my doctor suggested that I be tested again and the result was positive.

Dear Dr. Roach: My father, 79, used to play 18 holes of golf three times a week, but after a recent gallbladder removal, he started showing some unusual symptoms. He appeared to be a totally different person: helpless and unable to walk.

Dear Dr. Roach: You published an article in April discussing the differences between osteoarthritis and rheumatoid arthritis. How does 鈥渄egenerative arthritis鈥� differ from the other two? R.L.

Why is heart attack the No. 1 killer in North America? Ninety-nine per cent of doctors say it鈥檚 due to atherosclerosis (hardening of arteries) and that cholesterol-lowering drugs are the primary way to treat it.

DALLAS 鈥� They鈥檙e fixated by fitness magazines, addicted to ab workouts. They measure what they eat, they know what they weigh, and they may not be the gender you surmise.

We鈥檝e been told to stand up straight as long as we鈥檝e been able to stand, but sometimes it鈥檚 harder than it seems. We know why we should do it: Good posture looks good, feels good and makes us look slimmer.

Dear Dr. Roach: My 18-year-old grandson sustained a concussion while skateboarding. He does not remember the event, which happened about a month ago. He is back in college and can manage his studies. However, he lost his senses of smell and taste.

Dear Dr. Roach: A man has erectile dysfunction because blood will not flow into his penis. What is the connection between this blood flow and the blood flow in the rest of his body? Also, how do medications like Viagra cause blood to flow? T.E.