text_1: Email question from study physician:  "A frail, thin, 82-year-old male presented to me with new onset of unilateral gynecomastia.  Now the question is: Do I have to pursue any further workup? Mammogram? Is this similar to the adolescent male unilateral gynecomastia that we sometimes see, or is this more worrisome?
text_2: How should I workup unilateral gynecomastia in an elderly man?