On breast ultrasound, a lesion is described as oval, circumscribed, parallel orientation (wider than tall), homogeneous, mildly hypoechoic with posterior acoustic enhancement. These features are MOST consistent with:

• A Fibroadenoma ✓
• B Phyllodes tumour
• C Invasive ductal carcinoma
• D Breast abscess

Explanation

Classic ultrasound features of a fibroadenoma include an oval, circumscribed (well-defined), horizontally oriented (parallel to the skin), mildly hypoechoic, homogeneous lesion with posterior acoustic enhancement (or no posterior features). These benign features correspond to BI-RADS 3 in a young woman. Invasive ductal carcinoma shows irregular shape, spiculated/microlobulated margins, vertical orientation, and posterior shadowing. Abscess has complex cystic content. Phyllodes may show similar features but tends to be larger with internal clefts.

Reference: Grainger & Allison's Diagnostic Radiology, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.