Luckily for me the tumor is located at the edge of my breast near my underarm, so he used an angle that would puncture the least amount of breast tissue, in order to avoid the complication of a milk fistula (leaking of milk from incision site). It is possible
to have a biopsy
while breastfeeding, and a lactation consultant can help you if you need it. If it is too difficult for the wound to heal you may have to stop, but at least give it a try.