Atypia
Understanding Atypical Breast Cells
Atypia refers to atypical cells found in breast tissue that carry an increased cancer risk. Our specialists provide expert evaluation, management, and personalized screening strategies.
What is Atypia?
Atypia refers to cells that appear abnormal under the microscope but are not cancerous. These atypical cells represent an intermediate stage between normal breast tissue and breast cancer, and they carry an increased risk of developing breast cancer in the future.
Types of Atypia
There are two main types of atypia that can be found in breast tissue:
Atypical Ductal Hyperplasia
Abnormal cell growth within the milk ducts of the breast. These cells show some features of cancer but not enough to be classified as cancer.
Atypical Lobular Hyperplasia
Abnormal cell growth within the lobules (milk-producing glands) of the breast. Similar to ADH but occurring in a different area of breast tissue.
Why Open Surgical Biopsy is Recommended
Incomplete Picture from Needle Biopsy
When ADH or ALH is seen on a needle biopsy, there is a chance that it may not represent the full pathological change in the area. In 15-20 percent of cases, there may also be in situ or invasive malignancy present.
For this reason, when ADH or ALH is seen on needle biopsy, open surgical biopsy is recommended. This usually involves a general anaesthetic and a small incision in the breast to remove a portion of the involved breast tissue to obtain a more accurate diagnosis.
If Only Atypia is Found
No Further Treatment Needed
If ADH or ALH only is seen on the open biopsy, then no further treatment is required at that time.
What this means:
- • No cancer was found
- • No immediate treatment is needed
- • Focus shifts to monitoring and prevention
- • Enhanced screening program begins
Increased Cancer Risk
Higher Risk Profile
For women with atypia, their risk of developing future breast cancer is increased by about two to four fold compared to women without atypia.
Risk factors:
- • Age at diagnosis of atypia
- • Family history of breast cancer
- • Type and extent of atypia
- • Other personal risk factors
Enhanced Screening Program
As the risk of developing future breast cancer is increased, further screening includes more frequent and comprehensive monitoring:
Annual Mammogram
Yearly mammography to detect any changes early
Breast Ultrasound
Combined with mammogram for enhanced detection
MRI Screening
Sometimes useful as an additional screening tool
Additional High-Risk Management
If there is also a strong family history in a patient who has atypia, other strategies may sometimes be considered:
Risk-Reducing Medications
Oestrogen blocking medications such as Tamoxifen or aromatase inhibitors can help reduce the risk of developing breast cancer.
Considerations:
- • Reduces cancer risk by approximately 50%
- • Requires discussion of benefits vs. side effects
- • Typically recommended for 5 years
Prophylactic Mastectomy
In rare cases with very high risk (strong family history plus atypia), preventive removal of breast tissue may be considered.
Considerations:
- • Most significant risk reduction (>95%)
- • Major surgical decision
- • Requires extensive counseling and evaluation
Important: These options are only considered in specific high-risk situations and require thorough discussion with your specialist to weigh benefits, risks, and personal preferences.
Expert Management of High-Risk Breast Lesions
If you've been diagnosed with atypia, our specialists provide comprehensive evaluation, personalized risk assessment, and tailored screening and management plans.