What is the most common breast anomaly?

• A. Polythelia
• B. Gynecomastia
• C. Galactocele
• D. Fibroadenoma

Answer: (A)

The main idea here is recognizing a congenital variation along the breast milk line. Polythelia is an extra nipple that can appear anywhere along the embryologic milk line (from the axilla toward the groin). It’s the most common breast anomaly because many people have an additional nipple without other breast tissue, and it’s usually an incidental, benign skin finding rather than a true breast mass.

In ultrasound practice, this appears as a small nipple-like projection or skin appendage along the chest, without the glandular changes seen with true breast tissue. The other options describe different conditions with distinct contexts: gynecomastia is breast enlargement in males; a galactocele is a milk-filled ductal cyst typically after lactation; fibroadenoma is a common benign breast tumor in younger women. These are not the most common congenital anomalies along the milk line.