A 38-year-old woman notices a firm, mobile, smooth 1.5 cm lump in the left breast that has been present for two years and has not changed in size. Ultrasound confirms a homogeneous solid mass with well-defined margins. The most likely diagnosis is:

• A Phyllodes tumour
• B Breast cyst
• C Fat necrosis
• D Fibroadenoma ✓

Explanation

A firm, smooth, mobile, slow-growing solid lump in a young woman is characteristic of a fibroadenoma, the most common benign breast tumour in women under 40. Ultrasound showing a well-defined homogeneous solid mass strongly supports this diagnosis. Phyllodes tumours tend to enlarge rapidly. Breast cysts are anechoic on ultrasound. Fat necrosis follows trauma and may have irregular margins.

Reference: Bailey & Love's Short Practice of Surgery, 27th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.