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A well-outlined, regular, clear spot is more likely to be a benign lesion, such as a cyst (non-cancerous).
A poorly outlined, opaque area is more likely to suggest breast cancer. However, not all benign lesions are perfectly round, and some cancers may appear well-defined. Sometimes, the doctor will use ultrasound to further examine the abnormality and evaluate the next best step. When findings from a mammogram or ultrasound look suspicious, a biopsy is performed to determine if a lesion is benign or cancerous.
Conditions under which the test may be performed include the following:
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