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Abstract
Breast-conserving therapy is increasingly being used in the treatment of breast cancer. Monitoring local recurrence, which occurs in 1%-2% of cases per year, is therefore becoming more important (Rankin, 2000).
The proper follow-up of these patients usually includes periodic clinical examination, mammography and ultra-sonography (Kramer et al., 1998).
Detection of recurrence on the prior lumpectomy site still represents a challenge because of changes in breast tissue after treatment. Clinical examination, mammography or ultra-sonography can raise a suspicion but an additional evaluation is frequently mandatory to avoid unnecessary biopsy or surgery.
Several recent studies have shown the important role of breast magnetic resonance imaging (MRI) imaging for detection of recurrent lesions in patients treated with conservative surgery (quadrantectomy) and radiation therapy (Kramer et al., 1998; Heywang et al., 1989).
Magnetic resonance mammography (MRM) has high sensitivity, high specificity and high accuracy in differentiating physiologic changes of the scar from tumoral tissue (Kramer, 1998, Murray et al., 1996; Davis et al., 1997).
MRM multifactorial evaluation, based on both morphological features and time–signal intensity curves of enhancing lesions, is related to significantly higher sensitivity and higher specificity than evaluation protocols based only on one morphological or enhancing feature (Fisher et al., 1989).