ArticleAnnals of surgical oncology2025
Accuracy of Breast MRI for Surgical Planning After Neoadjuvant Therapy for Patients with Invasive Lobular Carcinoma.
Article in Annals of surgical oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Imaging Overestimates the Local Extent of Breast Tumor After Neoadjuvant Chemotherapy.Annals of surgical oncology · 2026Article
- Locoregional Considerations for Invasive Lobular Carcinoma.Current breast cancer reports · 2026Review
- ASO Author Reflections: Accuracy of MRI in Invasive Lobular Carcinoma after Neoadjuvant Therapy: Impact of Non-mass Enhancement.Annals of surgical oncology · 2025Article
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9 authors.
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Abstract
backgroundInvasive lobular carcinoma (ILC) is the second most common subtype of breast cancer, comprising 10-15% of cases. Due to its diffuse growth pattern, conventional imaging techniques have decreased sensitivity for ILC. While breast magnetic resonance imaging (MRI) is often recommended for ILC, its accuracy following neoadjuvant therapy is unknown. We evaluated the accuracy of post-treatment MRI and examined the impact on surgical outcomes. PATIENTS AND
methodsWe retrospectively analyzed 129 patients with ILC who underwent neoadjuvant chemotherapy (NAC) or endocrine therapy (NET) and had post-treatment MRI. We considered a 0.5 cm difference between longest tumor diameter on MRI and pathologic tumor size to be discrepant. Tumor imaging phenotype was categorized as mass, non-mass enhancement (NME), or mass + NME. We evaluated concordance between imaging and pathology by tumor phenotype and associations with positive margin rates using Stata 18.0.
resultsPost-treatment MRI underestimated tumor size in 52.5% of cases, was concordant in 25.3%, and overestimated in 22.2%. The presence of NME was associated with a higher rate of tumor size underestimation (62.5% versus 39.5% for mass only, p = 0.023); mean underestimation was 3.4 cm in those with NME. Underestimation was associated with higher positive margin rates following breast-conserving surgery (p = 0.018). Finally, among patients with complete imaging response on MRI, 93.3% had residual invasive disease on pathology.
conclusionsFollowing neoadjuvant therapy, post-treatment MRI frequently underestimates tumor size in ILC, particularly in tumors with NME. Surgeons should consider these imaging limitations when planning resection, which could improve surgical outcomes.
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