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Breast Oncology Glossary

100 terms total — 24 showing — Last updated 15 Sep 2026

Oncotype DX

Professional Technical IVT

Genomic test that analyzes tumor genes to predict chemotherapy benefit and recurrence risk.

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accelerated partial breast irradiation

Professional Technical IVT

A radiation therapy technique that delivers higher doses over fewer treatments to only the tumor bed region rather than...

Technical Term Full entry →

adjuvant therapy

Intermediate Technical IVT

Treatment given after primary surgery to reduce the risk of cancer recurrence.

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ALND

Professional Technical IVT

Abbreviation for axillary lymph node dissection, an extensive lymph node removal procedure.

Abbreviation Full entry →

architectural distortion

Intermediate Technical IVT

Abnormal breast tissue pattern on imaging characterized by disruption of normal breast architecture without visible mass...

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aromatase inhibitor

Professional Technical IVT

A class of hormone therapy drugs that block estrogen production in postmenopausal women with hormone receptor-positive b...

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atypical ductal hyperplasia

Professional Technical IVT

A benign breast condition characterized by abnormal cell growth within milk ducts that increases breast cancer risk.

ADH
Technical Term Full entry →

axillary lymph node dissection

Professional Technical IVT

Surgical removal of multiple lymph nodes from the armpit area to determine cancer spread and provide regional disease co...

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background enhancement

Professional Technical IVT

Normal breast tissue enhancement pattern on contrast-enhanced MRI that can affect lesion detection and characterization.

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background parenchymal enhancement

Professional Technical IVT

The degree of normal breast tissue enhancement on contrast-enhanced breast MRI, which can affect lesion detection and ch...

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BI-RADS

Professional Technical IVT

Standardized reporting system for mammography and breast imaging findings.

Technical Term Full entry →

BIRP

Professional Technical IVT

Breast Imaging-Reporting and Data System for Pathology; standardized terminology for breast pathology reporting.

Abbreviation Full entry →

bracketing wires

Advanced Technical IVT

Multiple guide wires placed around the margins of a breast lesion to assist surgical excision of extensive or multifocal...

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BRCA1

Professional Technical IVT

Tumor suppressor gene associated with increased risk of breast and ovarian cancers when mutated.

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CDK4/6 inhibitor

Professional Technical IVT

Targeted therapy drug that blocks proteins involved in cancer cell division.

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circulating tumor cells

Professional Technical IVT

Cancer cells that have detached from the primary tumor and circulate in the bloodstream, potentially indicating metastat...

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concordance

Intermediate Technical IVT

Agreement between imaging findings and pathological results, particularly important in breast biopsy interpretation and...

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concordance index

Professional Technical

A statistical measure used to evaluate the predictive accuracy of prognostic models in oncology outcomes research.

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concordance rate

Professional Technical IVT

Statistical measure of agreement between different diagnostic methods or observers in breast cancer assessment.

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contralateral breast cancer

Intermediate Technical IVT

Development of a new primary cancer in the opposite breast from the original tumor.

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contralateral prophylactic mastectomy

Intermediate Technical IVT

Surgical removal of the unaffected breast in patients with unilateral breast cancer to reduce risk of developing cancer...

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contralateral risk-reducing mastectomy

Professional Technical IVT

Prophylactic surgical removal of the unaffected breast in patients with unilateral breast cancer to reduce future cancer...

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contralateral surveillance

Advanced Technical IVT

Systematic monitoring of the opposite breast in patients with unilateral breast cancer to detect metachronous cancer dev...

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DCIS

Intermediate Technical IVT

Abbreviation for ductal carcinoma in situ, a non-invasive form of breast cancer confined to milk ducts.

Abbreviation Full entry →

deep margin

Professional Technical IVT

The surgical margin closest to the chest wall or pectoralis fascia in breast-conserving surgery, critical for assessing...

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