Before we talk about treatment, let's start with a discussion about the human body and about your medical condition. Your doctor has recommended that you undergo a breast biopsy procedure - or lumpectomy. But what does that actually mean? Biopsy is a general term which simply means "the removal of tissue for microscopic examination." Your doctor intends to remove tissue from the breast - not because you're necessarily ill - but because breast biopsy is a very accurate method for analyzing breast tissue. Medical Malpractice Because it provides such accurate diagnostic information, breast biopsy is an important diagnostic tool in the fight against breast cancer. In your case, you have lump in your breast which is too small to be felt by touch. Your radiologist detected this abnormality while reviewing your recent mammogram - or breast x-ray. Let's take a moment to look at the reasons why lumps form in breast tissue. Medical Malpractice The breast is made of layers of skin, fat and breast tissue - all of which overlay the pectoralis muscle. Breast tissue itself is made up of a network of tiny milk-carrying ducts and there are three ways in which a lump can form among them.