Magnetic resonance imaging at an early phase after contrast injection with subtraction. Magnetic resonance imaging at an early phase after contrast injection with subtraction revealed an approximately 1.5 cm mass with arterial enhancing components (arrows) that correlated well with microlobulated hypoechoic lesions on ultrasound; this lesion was confirmed for invasive ductal carcinoma. The unenhancing portion (arrowhead) is considered fibroadenoma.