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BI-RADS CATEGORY 2 BENIGN FINDINGS
This is very similar to BI-RADS Category 1 Negative. There are no worrisome findings. There may be benign findings such as a cyst or intramammary lymph nodes (a normal finding). There is no evidence of cancer.
BI-RADS CATEGORY 3 PROBABLY BENIGN FINDING
This means that there is a "probably benign" finding with a low chance of cancer. In fact, this designation means that there is less than 2% risk of cancer. The usual recommendation is to do a follow up study (i.e. mammogram and/or ultrasound) in 6 months. If the patient is uneasy about waiting 6 months, she can request a biopsy for a more immediate result.
BI-RADS CATEGORY 4 SUSPICIOUS ABNORMALITY
There is a chance that the abnormal finding is cancer. A biopsy should be performed. Some radiologists divide this category into 4A ( low suspicion for cancer), 4B (intermediate suspicion for cancer) and 4C ( moderate suspicion for cancer ).
BI-RADS CATEGORY 5 HIGHLY SUGGESTIVE OF MALIGNANCY
There is a very high probability (greater than 95%) that there is cancer. Biopsy is strongly recommended.
BI-RADS CATEGORY 6 KNOWN BIOPSY-PROVEN MALIGNANCY
The finding on the mammogram or ultrasound is already known to be cancer.
BIBASILAR
Adjective. Lowest part of both lungs. This refers to areas of the lungs that are close to the diaphragms.
BILE
Liquid produces by the liver and store in the gallbladder. When you eat a fatty meal, this liquid drains into your intestine through a series of tubes (cystic duct and common bile duct) to help digest fatty food.
BILE DUCT
Draining tubes of bile.
BILIARY
Anything related to the draining tubes of bile.
BILOMA
Abnormal pool of bile liquid, located outside of the gallbladder or bile duct. Often from bile duct injury.
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