breast cancer

Granular cell
tumor of the breast • Granular cell tumor of the breast - Ganzer Fall bei Radiopaedia
Holland, M. Granular cell tumor of the breast. Case study, Radiopaedia.org. (accessed on 08 Nov 2022) https://doi.org/10.53347/rID-19062 • CC by-nc-sa 3.0 (modified)
Breast MRI
enhancement curves • High grade ductal carcinoma in situ: MRI findings - Ganzer Fall bei Radiopaedia
O'Donnell, C. High grade ductal carcinoma in situ: MRI findings. Case study, Radiopaedia.org. (accessed on 04 Nov 2022) https://doi.org/10.53347/rID-38489 • CC by-nc-sa 3.0 (modified)
Ultrasound
image of breast cancer, 71F, 7mm
Wikipedia • CC BY-SA 3.0
Mucinous
carcinoma of the breast. The nodule shows a curve type I.
www.eurorad.org • CC by-nc-sa-4.0
Radiopaedia • CC-by-nc-sa 3.0 • de

Breast neoplasms consist of a wide spectrum of pathologies from benign proliferations, high-risk lesions, precursor lesions, to invasive malignancies.​ This article provides an overview for radiologists, with a focus on breast cancer. For a summary article for medical students and non-radiologists, see breast cancer (summary).

Epidemiology

Breast cancer is the most common nonskin malignancy in women. In the affluent populations of North America, Europe, and Australia, 6% of women develop invasive breast cancer before age 75, compared to a 2% risk in developing regions of Africa and Asia . The difference has been attributed to risks associated with a Westernized lifestyle, including high-calorie diet rich in fat and protein and physical inactivity .

Risk factors

Pathology

Classification

The main pathological classification of breast neoplasms is published by the World Health Organization: WHO classification of tumors of the breast.

The vast majority of breast cancers are adenocarcinomas (99%). The most common types are :

Categories of benign epithelial neoplasms include:

Nonepithelial malignancies are uncommon and include:

Immunophenotype

Three molecular biomarkers are routinely evaluated in invasive breast cancers because they have therapeutic implications:

  • estrogen receptor (ER)
  • progesterone receptor (PR)
  • human epidermal growth factor receptor 2 (HER2; protooncogene Neu; receptor tyrosine-protein kinase erbB-2)
Staging

Staging of breast tumors is performed according to the TNM system published by the American Joint Committee on Cancer (AJCC)/Union for International Cancer Control (UICC): breast cancer (staging).

Radiographic appearance

Dedicated evaluation of the breast involves multiple imaging modalities to detect and localize lesions for biopsy. In all modalities, regional metastasis can be suspected by the presence of axillary adenopathy.

Mammography

Neoplasms have varied appearances, including masses, asymmetries, calcifications, or architectural distortions.

Ultrasound

Neoplasms can appear as masses or architectural distortions. Calcifications can sometimes be seen.

MRI

Neoplasms can manifest as masses with or without enhancement, nonmass enhancement, or foci of enhancement.

CT

Breast masses may be incidentally identified but CT is not the preferred modality for dedicated breast evaluation. If calcifications are visualized on CT, they are nearly all benign .

Radiology report

The use of a standard lexicon is recommended to enhance communication with referrers and audit performance: breast imaging-reporting and data system (BI-RADS).

Siehe auch:
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Assoziationen und Differentialdiagnosen zu Neoplasien der Mamma:
Phylloidestumor
 
Wikipedia • CC BY-SA 3.0
maligner
Phylloidestumor
surgicalcasereports.springeropen.com • CC-by-4.0
Juvenile
Papillomatose der Mamma
www.eurorad.org • CC by-nc-sa-4.0
invasives
muzinöses Mammakarzinom
www.eurorad.org • CC by-nc-sa-4.0
Mammakarzinom
Sonographie
Wikipedia • CC BY-SA 4.0
extraskelettales
Osteosarkom der Mamma
surgicalcasereports.springeropen.com • CC-by-4.0
tubular
carcinoma of breast
www.eurorad.org • CC by-nc-sa-4.0
fibrosarcoma
of the breast
surgicalcasereports.springeropen.com • CC-by-4.0
Granularzelltumor
der Mamma
insightsimaging.springeropen.com • CC-by-4.0
Fibromatose
der Mamma
www.eurorad.org • CC by-nc-sa-4.0
Morbus Paget
der Mamille
www.eurorad.org • CC by-nc-sa-4.0
intraductales
Papillom der Mamma
insightsimaging.springeropen.com • CC-by-4.0
Metastasen
bei Mammakarzinom
Wikipedia • CC BY-SA 4.0