MRI of the breast--histopathologic correlation

Area of Science:

• Radiology
• Oncology
• Pathology

Background:

• Breast mass characterization is crucial for diagnosis.
• Magnetic Resonance Imaging (MRI) offers detailed anatomical and tissue information.
• Histopathological correlation is the gold standard for breast lesion diagnosis.

Purpose of the Study:

• To evaluate the correlation between MRI signal intensities and histopathological findings in solid breast masses.
• To assess the utility of T1- and T2-weighted MRI sequences in differentiating benign and malignant breast lesions.

Main Methods:

• Retrospective analysis of 132 solid breast masses examined by MRI.
• Histopathological correlation of MRI findings.
• Visual evaluation of T1- and T2-weighted SE and multi-echo MRI sequences.

Main Results:

• T2-weighted MRI signal intensities correlated with tissue composition (fibrosis, cells, water).
• Characteristic internal structures reflecting histopathology were visible in some lesions on T2-weighted images.
• Signal intensity differences were noted between fibroadenomas with high fibrosis and other well-circumscribed lesions (fibroadenomas, carcinomas).
• Discrimination between benign and malignant irregular lesions based on signal intensity or T1/T2 values was not consistently possible due to overlapping compositions.

Conclusions:

• T2-weighted MRI can provide insights into the histopathological composition of certain breast masses.
• MRI signal intensity alone is insufficient for reliably differentiating all benign from malignant irregular breast lesions.
• The similar composition of benign and malignant irregular lesions contributes to diagnostic overlap on MRI.