Which quadrant is breast cancer most common?
Most breast cancers develop in the upper outer quadrant of the breast, closest to the armpit. This is because this area has a lot of glandular tissue.
What quadrant is 3 o’clock in the breast?
The outer left breast is at 3 o’clock and the outer right breast is at 9 o’clock. In the left breast the upper outer quadrant is between 12 and 3 o’clock. The radiologist will also describe the size and location of a finding by indicating the distance from the nipple in centimeters.
Does asymmetry on mammogram mean cancer?
A common abnormality seen on mammogram results is breast asymmetry. Breast asymmetry is usually no cause for concern. However, if there’s a large variation in asymmetry or if your breast density suddenly changes, this could be an indication of cancer.
How are quadrants of breasts divided?
Classification of Breast Quadrants A single breast can be divided into four quadrants: UO, upper inner (UI), lower outer (LO), and lower inner (LI) by two perpendicular planes intersected at the nipple.
What is Birads classification?
The Breast Imaging Reporting and Data System (BI-RADS), developed by the American College of Radiology, provides a standardized classification for mammographic studies. This system demonstrates good correlation with the likelihood of breast malignancy.
Where does breast cancer usually spread first?
In most cases, breast cancer first spreads to other parts of an affected breast, then to nearby lymph nodes. If cancerous cells make their way into the lymphatic system, they can then reach distant parts of the body. The most common locations for metastatic breast tumors include the: Lungs.
What area of the breast is most vulnerable to breast cancer?
Multiple studies have shown that women with mammographically dense breasts are at a higher risk of developing breast cancer and that the upper outer quadrant of the breast is the most frequent site where breast cancer is located.
What quadrant is 6 o’clock in breast?
1 Central portion of breast. lower inner quadrant is between 3 and 6 o’clock; the lower outer quadrant is between 6 and 9 o’clock; and the upper outer quadrant is between 9 and 12 o’clock.
What quadrant is 9 o’clock in the right breast?
Facing your right breast, the upper outer quadrant is in the 9:00 o’clock to 12:00 o’clock position.
Is asymmetry a mass?
By definition, a focal asymmetric density is seen on two mammographic views but cannot be accurately identified as a true mass (,,,Fig 4). Although a focal asymmetric density may represent normal breast tissue, further evaluation is often warranted to exclude a true mass or architectural distortion.
How often is asymmetry on mammogram cancer?
The likelihood of underlying cancer when a developing asymmetry is identified at screening mammography is 12.8%, and when identified at diagnostic mammography (performed for evaluation of a symptom or performed for short-interval follow-up of a probably benign lesion, of a benign concordant biopsy, or in the first 5 …