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Dear Dr. Roach: I am inquiring about low cortisol. My son recently was told that his cortisol level is 0.39 and that it should be above 1.8. The result was from a saliva test.

Dear Dr. Roach: I am a 48-year-old woman in good health, minus high blood pressure, which is under control with regular medication.

Dear Dr. Roach: My son started having gastrointestinal problems in high school. Approximately three years ago, they became so intense that he couldn鈥檛 work. Last May, he finally had surgery for gastric reflux.

Dear Dr. Roach: My doctor put me on atenolol for occasional racing-heart incidents: In the past five or so years, I鈥檝e experienced only three or four such incidents a year, lasting five to 15 minutes each time. I also have had a cough for years.

Dear Dr. Roach: My 18-year-old grandson has just been informed that he has left ventricular noncompaction cardiomyopathy. He has been VERY active his whole life, playing football, baseball, basketball and soccer all through high school.

Dear Dr. Roach: My husband has cancer in his bladder. It was found when he was having his prostate checked. He asked the doctor what caused it.

Dear Dr. Roach: I wonder why you never talk about holistic measures to prevent illnesses, such as cancer.

Faced with a medical decision, patients usually allow their doctors to decide on treatment, assuming they know best. But Consumer Report on Health claims this approach rarely works anymore.

Dear Dr. Roach: In August 2014, my urologist ordered a CT scan to confirm a possible recurrence of kidney stones. The stone results were negative; however, the scan report described findings of a small, low-density lesion in the pancreas measuring 4.

Dear Dr. Roach: Your recent discussion on prostate cancer screening appears to bear out my belief that neither statistical evidence nor anecdotal evidence can be ignored in proving or disproving a case for screening.