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Mammographic findings after breast conservation therapy
R Krishnamurthy1, G J Whitman, C B Stelling
1Division of Diagnostic Imaging, University of Texas M.D. Anderson Cancer Center, Houston 77030, USA.
Summary
Distinguishing local breast cancer recurrence after conservation therapy requires careful mammographic analysis. Key indicators include changes in post-treatment findings like masses, edema, and calcifications over time.
Area of Science:
- Oncology
- Radiology
- Medical Imaging
Background:
- Breast conservation therapy (BCT) combines lumpectomy/segmental mastectomy with radiation.
- Posttreatment changes on mammograms can mimic or obscure local breast cancer recurrence.
- Accurate differentiation is crucial for patient management.
Purpose of the Study:
- To outline the mammographic distinctions between posttreatment sequelae and local recurrence after BCT.
- To guide radiologists in identifying signs of recurrent breast cancer.
Main Methods:
- Review of characteristic mammographic appearances of posttreatment changes.
- Comparison of interval findings on serial mammographic studies.
- Analysis of specific features: masses, fluid collections, edema, scarring, and calcifications.
Main Results:
- Postoperative masses and fluid collections typically resolve within one year.
- Increasing edema may indicate recurrence, while gradual resolution suggests posttreatment effects.
- Scarring often presents as poorly defined masses with radiolucent areas; recurrence typically lacks these.
- Pleomorphic/granular microcalcifications are markers of recurrence, unlike dystrophic calcifications of scarring.
Conclusions:
- Mammographic surveillance is vital for detecting local breast cancer recurrence post-BCT.
- Characteristic patterns of change over time help differentiate recurrence from benign posttreatment changes.
- Recognizing specific imaging features of masses, edema, and calcifications improves diagnostic accuracy.