In a condition called hyperplasia, too many of these cells begin to grow. Several layers of thickness develop. Sometimes, these cells change and become abnormal. When this happens it’s called an atypical change.
Atypical hyperplasia describes a change in cells that line the ducts or lobules of the breast. Figure 1, below, shows you the cell changes that happen with this condition.
There are 2 kinds of atypical hyperplasia:
If you have one of these it doesn’t mean that you have cancer. You are however, at higher risk for breast cancer. It can take many years for these conditions to develop into breast cancer.
Many people don’t know they have atypical hyperplasia. It doesn't show up on a regular screening mammogram or breast self-exam. If you do know you have this condition because of a biopsy or other procedure, talk with your healthcare provider about a plan to watch and treat this condition.
Current as of: September 9, 2020
Author: Women’s Health, Alberta Health Services
This material is not a substitute for the advice of a qualified health professional. This material is intended for general information only and is provided on an "as is", "where is" basis. Although reasonable efforts were made to confirm the accuracy of the information, Alberta Health Services does not make any representation or warranty, express, implied or statutory, as to the accuracy, reliability, completeness, applicability or fitness for a particular purpose of such information. Alberta Health Services expressly disclaims all liability for the use of these materials, and for any claims, actions, demands or suits arising from such use.