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Dear Dr. Roach: I am a healthy 58-year-old woman. One year ago, I was sitting on a friend鈥檚 porch when suddenly it was as if someone had poured thick oil over my left eye.

Dear Dr. Roach: After having several strange-looking 鈥減imples鈥� on my thighs and one on my face, I was told it is lymphomatoid papulosis. One or two people in a million are diagnosed with this.

Have you ever heard of UTI (urinary tract infection) Drops? I doubt it, as these natural herbal drops have just recently been imported from Europe to treat troublesome, acute and chronic E. coli urinary tract infection.

Dear Dr. Roach: I was a registered nurse for more than 45 years, and I admit that I am old-school. I specialized in emergency-room and cardiac care.

Dear Dr. Roach: For the past several months, I鈥檝e had problems in my right eye. The eye was bloodshot and painful, and vision was blurry. I was diagnosed with uveitis, and the doctors didn鈥檛 know why it happened.

Dear Dr. Roach: Radiation can be used to treat cancer, but I鈥檝e heard that radiation from too many CT scans and X-rays can cause cancer. What is the difference? I鈥檓 72 and have had close to 25 CT scans over the years, mostly of my sinuses.

In Thunder Bay, Ont., recently, while giving a talk, I suddenly found my mouth watering. I mentioned that I was just 250 kilometres away from Quetico Park, where I had spent two months alone years ago doing fish research.

Dear Dr. Roach: I know people who home-school their kids because they won鈥檛 allow them to be vaccinated as required by the schools.

Dear Dr. Roach: I have been diagnosed with prediabetes (A1c 5.8) and kidney failure (eGFR 58, creatinine 0.97). I am confused about which problem to address through diet.

Dear Dr. Roach: I am an 84-year-old man diagnosed with primary progressive aphasia. The neurologist says nothing can be done for it. What can you tell me? J.M.M. Primary progressive aphasia is a progressive inability to use words and language.