Ductal carcinoma in situ: MR imaging-histopathologic correlation

Area of Science:

• Radiology
• Oncology
• Pathology

Background:

• Ductal carcinoma in situ (DCIS) is a non-invasive form of breast cancer.
• Accurate diagnosis and characterization of DCIS are crucial for effective treatment.
• Magnetic resonance (MR) imaging offers advanced visualization techniques for breast lesions.

Purpose of the Study:

• To correlate histopathologic findings of DCIS with magnetic resonance (MR) imaging features.
• To investigate the relationship between MR imaging enhancement patterns and the underlying histopathology of DCIS.
• To assess the role of tumor angiogenesis in MR imaging findings of DCIS.

Main Methods:

• Thirty-six women with DCIS underwent preoperative contrast-enhanced dynamic MR imaging.
• Early contrast enhancement patterns in the breast parenchyma were analyzed.
• Histopathologic evaluation included assessment of ductal size, density, and tumor angiogenesis via immunoperoxidase staining.

Main Results:

• Early contrast enhancement was observed in 34 out of 36 DCIS cases.
• No early enhancement was noted in two cases of comedo-type DCIS.
• The size and morphology of contrast-enhanced lesions significantly correlated with the size and density packing of affected ducts (P = .0085 and P = .012, respectively).
• Tumor angiogenesis was identified in the stroma surrounding the ducts.

Conclusions:

• Contrast enhancement on dynamic MR images of DCIS is likely associated with tumor angiogenesis.
• MR imaging findings, particularly early contrast enhancement, can correlate with histopathologic features of DCIS.
• These findings support the use of dynamic contrast-enhanced MR imaging in the evaluation of DCIS.