breast imaging - european society for medical oncology€¦ · indications for breast mri •...
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Breast imagingMD PhD Kristina Lång
Lund University
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Disclosure:
Received speaker’s fee and travel grant from Siemens
Siemens Scientific Advisory Board Member (2017)
Research collaboration with Philips
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Assessment of symptomatic women
• Staging
• Classification Benign or Malignant cause of the symptoms?
Tripple assessment
Characterizing the cancer: size,
multiplicity, lymph node status
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Breast imaging techniques
• Mammography
• Ultrasonography
• MRI
• Tomosynthesis
• Contrast enhanced spectral mammography
• Breast CT, optical imaging, foto-acoustic imaging, breast
specific gamma imaging, thermography, phase-contrast
mammography…
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• X-ray imaging technique
• Attentuation differences of
tissues with different densities
• Women age > 30–35
Mammography
Attenutation
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• Mediolateral oblique (MLO)
• Craniocaudal (CC)
• Lateral (ML or LM)
• Spot compression
• Magnification view
Mammographic views
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Breast cancer appearances on mammography
Soft tissue mass
Architectural distortion
Focal asymmetry Microcalcifications
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Microcalcifications of high-grade DCISMicrocalcification can be the only sign of DCIS (+/- associated soft tissue mass)
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Soft tissue massThe importance of prior mammograms
4 mm ILC
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Associated features
Pathological lymph node
Unilateral oedema, skin
thickening
Skin retraction
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Diagnostic classification scores
1. Normal
2. A lesion having benign characteristics
3. An abnormality present of indeterminate significance
4. Features suspicious of malignancy
5. Malignant features
European guidelines for quality assurance in breast cancer screening
and diagnosis (4th ed)
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Mammography of the male breast
• Male breast cancer (life time risk 1/1,000)
• Gynecomastia (mostly adolescent boys, elder men)
GynecomastiaInvasive ductal
carcinoma
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The whole breast is examined
Enables comparison with prior
examinations
Sensitive for microcalcifications
Fast, cheap and accessible
Advantages
Mammography
Disadvantages
Radiation - not suitable for
young women
Limited sensitivity in dense
breasts
The most common medical imaging method
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BACKGROUND
1 5 - 3 0 % A V A L L A C A N C R A R U P P T Ä C K S E J V I D
M A M M O G R A F I S C R E E N I N G
M L O C C
CCMLO
PAD: 13 mm IDC G2, LN-
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Pivot
Detector
Compression paddle
Breast
z y
x
y
x
Mammography
Tomosynthesis
X-ray
source
2D
Pseudo-3D
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BTDM
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DM
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BAKGRUNDBT DM
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BT DM
PAD: 30 mm IDC G3, LN+
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Tomosynthesis
Increased sensitivity
Improved preoperative staging
Use the same unit for
mammography and tomosynthesis
Next screening modality?!
Advantages Disadvantages
Radiation based method
Not 100% sensitivity!
Reading time x 2-4
Provides a better mammogram
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A. B.
Mucinous cancer Benign cyst
1. 2.
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• Uses pulses of high-frequency sound
waves that are reflected in various
degrees in different types of tissues
• Indications: Young women (age <30–35)
Dense breasts
Characterize/classify lesions seen on mammography
Lymph node assessment
Guidance at interventional procedures (FNAC, biopsy,
preoperative localization, etc)
Ultrasonography
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IDC IDC
FA CYST
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Lymph node assessment
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Ultrasonography
Young women
Dense breasts
Characterize dense lesions seen on mammography
Guide at interventional procedures
Advantages Disadvantages
Microcalcifications
Operator dependent
False positives
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• Dynamic contrast-enhanced MRI
(Gadolinium)
• Study the contrast dynamics
• High sensitivity (90%), specificity (72%)
Peters et al. 2008 Radiology
Breast MRI
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Gadolinium contrast enhancement
Tumor Angiogenesis
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Contrast dynamics
Kuhl CK et al. Radiology 1999
Typ Ia,b: 6%
Persistent
Plateau
Washout
Typ II: 64%
Typ III: 87%
Probability of cancer:
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Indications for breast MRI
• Problem solving in case of inconclusive findings on conventional imaging.
• Screening of the contralateral breast in women with histological evidence of
unilateral breast cancer.
• Evaluation of the breasts in case of metastases of an unknown primary
carcinoma.
• Evaluation of therapy response in patients treated with neoadjuvant
chemotherapy.
• Exclusion of local recurrence after breast-conserving therapy.
• Screening of women with a lifetime risk of 20% or more to develop breast
cancer, including mutation carriers.
R Mann et al. Breast MRI: guidelines from the European Society of Breast
Imaging. Eur Radiol 2008
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• Tumour size can be underestimated with mammography and ultrasound,
especially invasive lobular carcinoma
• MRI is accurate in estimating tumour extension (multifocality, multicentricity)
• Pre-operative MRI is clinical practice in many countries
• Meta-analysis clearly shows that pre-operative MRI does not reduce the risk of
BC recurrence
• Pre-operative MRI is associated with increased odds of receiving ipsilateral
mastectomy and contralateral prophylactic mastectomy
Pre-operative staging with MRI
Houssami N et al J Clin Oncol 2014
Houssami N et al Breast Cancer Res Treat. 2017
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• MRI signal changes in deep nuclei
linked with repeated administration
of Gd contrast agents
• The clinical significance remains
unknown
Gulani V et al. Lancet Neurol. 2017 Jul
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Assessment of breast implants
Ruptured implant
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Breast MRI
Advantages Disadvantages
Microcalcifications
Specificity
Accessibility
Expensive
Gadolinium
No ionizing radiation
Dense breasts
High sensitivity
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Contrast enhanced spectral mammography
• Iodinated contrast agent
• Dual energy
• Similar sensitivity and better
specificity than MRI
• Advantage compared to MRI:Low energy High energy
– Increased specificity
– Microcalcifications
– Accessibility
– Cost-effective
”Poor mans MRI”
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Triple assessment
1. Medical history and clinical breast examination
2. Imaging – mammography and/or ultrasonography
3. Non-excision biopsy – fine needle aspiration (FNA)
cytology and/or core biopsy
• Sensitivity 99.6%
Irwig L, Macaskill P. Evidence relevant to guidelines for the investigation of breast symptoms.
Woolloomooloo (NSW): NHMRC National Breast Cancer Centre, 1997
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Core needle biopsy
• High sensitivity (97%)
• Ultrasound guided
• Stereotactic biopsy
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Ductography
Indications:
• Unilateral, single-pore, spontaneous nipple
discharge (bloody or clear)
Aim:
• Localize the origin of the secretion
• To identify intraducutal abnormalities:
– papillomas
– DCIS
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Screening for metastatic disease
• Incidence of metastatic disease in early-stage BC <2%
• Whole body screening (CT) justified: N2 disease, T4 tumour,
or local and regional recurrence
www.rcr.ac.uk
The Royal College of Radiologists. Guidance on screening and symptomatic breast imaging, 3rd
ed (2013)
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Summary
• Mammography and ultrasonography are the
cornerstones of breast imaging
• New imaging techniques can provide additional value
• MRI has high sensitivity and can be a problem solver
in the clinic
• Triple assessment should be used