[Breast density: a major parameter to follow during hormone replacement therapy]

Area of Science:

• Radiology
• Oncology
• Endocrinology

Background:

• Mammographic density is a significant breast cancer risk factor, influenced by BMI, hormones, and hormone replacement therapy (HRT).
• The mechanisms linking hormone-induced density changes and breast cancer risk pathways may differ.
• Increased mammographic density can compromise breast cancer screening sensitivity.

Observation:

• A case study details a patient whose mammographic density decreased post-menopause.
• The patient's mammographic density significantly increased after initiating HRT.
• Surgical biopsy confirmed an infiltrative breast carcinoma in the patient.

Findings:

• Hormone replacement therapy (HRT) can dramatically increase mammographic density.
• Increased mammographic density is associated with elevated breast cancer risk.
• Mammographic density changes during HRT require vigilant clinical and radiological follow-up.

Implications:

• Women on HRT require careful mammographic and clinical surveillance due to increased breast cancer risk and reduced screening sensitivity.
• Management strategies for HRT should consider potential increases in mammographic density.
• This case highlights the importance of monitoring density changes in patients undergoing HRT for early breast cancer detection.