I HAVE HAD A SWELLING UNDER MY ARM FOR OVER A YEAR NOW. I WAS TESTED FOR LYMPHOMA, CAME BACK NEGATIVE, TESTED FOR THYROID NODULES, CAME BACK NEGATIVE, SEEMS TO GET BIGGER RIGHT BEFORE MY MENSTRUAL CYCLE. WHAT CAN IT BE? I'M OVERWEIGHT AND I HAVENT
LOST ANY WEIGHT, WHICH I WOULD THINK WOULD SUGGEST SOMETHING MORE SERIOUS