I developed a Baker’s cyst on the back of it that is the size of a tennis ball. I have gone to an orthopedic doctor and had an ultrasound and x-rays done, but nothing showed up.

DEAR DOCTOR K: I have a Baker's cyst in my right knee. It has been drained twice and recurred. Are there any other treatments for it? DEAR READER: I discussed your question with my colleague, Dr ...