Could Pre-Existing Gynecomastia Return with Propecia Use?

Is it possible to increase a pre-existing case of gynecomastia when taking Propecia? If the gyno is surgically removed, is it possible for it to return when continuing use of the drug?

If you had gynecomastia without the Propecia and it was successfully treated by surgical excision, the impacted target organ (the particular breast tissue that was the cause) is now gone, so I would be surprised to see you get it again from Propecia.