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Dear Dr. Roach: I am 80 years old and just had a stroke. I was prescribed Coumadin. I had a miscarriage at age 30 with severe hemorrhaging. I think I needed a transfusion. They told me I have a 鈥渇actor鈥� in my blood.

Dear Dr. Roach: My eight-year-old grandson has had bright-red blood in his stool many times in the past four to six months. The doctor initially said he was dehydrated and needed to drink more water.

Dear Dr. Roach: Our son is聽43 and has sarcoidosis. We can鈥檛 find out much about this disease. Most doctors don鈥檛 seem to know much, either. Please help. E.L.

Your mission, if you choose to accept it, is to go on a spring vacation and remain on a diet and exercise regime of building muscle while losing a pound or two a week.

Dear Dr. Roach: I鈥檓 54 years old, 5 feet, 1 inch tall and weigh 110 pounds. I鈥檓 not medicated and I go for yearly physicals with my MD. I exercise regularly and have done so for most of my adult life.

Dear Dr. Roach: When I was discharged from the Army in 1966, I was diagnosed with a heart murmur.

Dear Dr. Roach: My 21-year-old son is a college athlete, a sprinter, but he has had recurrent high systolic blood pressure readings since he was a senior in high school. He鈥檚 generally easygoing and not stressed.

Dear Dr. Roach: I recently was diagnosed with pulmonary fibrosis. I am an otherwise healthy 73-year-old male who underwent bypass surgery seven years ago. I work out to keep in shape.

Dear Dr. Roach: I have to take levothyroxine in order to obtain an acceptable TSH (thyroid stimulating hormone) number.

Dear Dr. Roach: I was put on Coumadin several years ago for atrial fibrillation. It was a perpetual pain in the butt, all those tests and never knowing from day to day how much the blood had been changed from meal to meal.