Colorectal breast metastases presenting with atypical imaging features.

Area of Science:

• Oncology
• Radiology
• Pathology

Background:

• Breast metastases from non-breast primaries are uncommon, with colorectal carcinoma being a rare primary site.
• Metastatic disease to the breast signifies advanced cancer spread and carries a poor prognosis.

Observation:

• This report details two male patients with biopsy-proven colorectal carcinoma metastasizing to the breast.
• Both patients presented with unusual and atypical imaging features not previously documented in the literature.
• One case's imaging mimicked multifocal primary breast carcinoma.

Findings:

• Colorectal carcinoma metastases to the breast can exhibit diverse and atypical imaging characteristics.
• Distinguishing breast metastases from primary breast malignancies is crucial for appropriate patient management.

Implications:

• Accurate differentiation between metastatic and primary breast lesions impacts treatment strategies and patient outcomes.
• Radiologists and clinicians should consider rare metastatic etiologies, such as colorectal carcinoma, in breast imaging evaluations.