At this time we have not undergone any genetic testing, but about 5 years ago, I found a lump in
my left breast
, oblong in
shape, about an inch long, above and a little left of my nipple. It scared me, so I had it checked and the doctor said it was caused by an increased consumption of caffeine. I had in fact started drinking more caffeinated beverages so this made sense to me at the time. Now the lump is still there, and it is tender to the touch.