Diagnostic Approach to Gynecomastia

Initial Evaluation and Imaging

• Most men with breast symptoms can be diagnosed based on clinical findings without imaging, according to the American College of Radiology, as stated in Praxis Medical Insights 1
• For men with indeterminate breast masses, the American College of Radiology recommends ultrasound as the initial imaging study for men younger than 25, and mammography or digital breast tomosynthesis for men 25 and older 1

Diagnostic Considerations and Pitfalls

• It is essential to differentiate true gynecomastia from pseudogynecomastia, especially in patients with elevated BMI, as noted by Praxis Medical Insights 1, 2
• Breast cancer in males is rare, but should be ruled out, especially in older men, with a median age of 63 years, according to Praxis Medical Insights 1

Special Patient Populations

• Gynecomastia is bilateral in approximately 50% of patients, as reported by Praxis Medical Insights 1
• In patients with BRCA2 mutations and Klinefelter syndrome, there is a higher risk of male breast cancer, warranting careful imaging evaluation, according to Praxis Medical Insights 2

Malignancy vs. Gynecomastia

• A case study published in the Mayo Clinic Proceedings demonstrated diagnostic mammograms showing a round high-density retroareolar mass in a transgender woman, with ultrasound showing an irregular hypoechoic mass with blood flow, features suspicious for cancer that were confirmed as invasive ductal carcinoma 3