title: Second opinion. I'm a relatively healthy 67-year-old man. In recent months I've noticed an increase in the size of my breasts. What could be causing this and should I be concerned?
mesh_terms: D000367:Age Factors; D000368:Aged; D006177:Gynecomastia / Q000209:etiology*; D006801:Humans; D008297:Male; D010353:Patient Education as Topic