A 28-year-old woman presents with a smooth, rubbery, freely mobile 2 cm breast lump that is painless and has been slowly growing over 18 months. Ultrasound shows a well-circumscribed, uniformly hypoechoic solid mass wider than tall. What is the most likely diagnosis?
- A Invasive ductal carcinoma
- B Fibroadenoma ✓
- C Phyllodes tumor
- D Breast cyst
Correct answer: B. Fibroadenoma
Explanation
Fibroadenoma is the most common benign breast tumor in young women, presenting as a painless, firm, mobile mass with characteristic benign ultrasound features (well-circumscribed, hypoechoic, wider than tall). Invasive carcinoma is irregular and hard. Phyllodes tumors are less common and often larger. Cysts are fluid-filled, not solid.
Reference: Bailey and Love's Short Practice of Surgery, 28th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.