Fig. 8.

Infectious cause: Corynebacterium. A 31-year-old pregnant woman had a red and swollen right breast. On ultrasound-guided biopsy and aspiration, Corynebacterium infection was identified. a Ultrasound of the right periareolar region demonstrates marked vascularity on colour Doppler with heterogeneous breast tissue and areas of hypoechogenicity consistent with micro-abscesses (red arrow). Appearances are identical to idiopathic granulomatous mastitis sonographically. b Axial contrast-enhanced MRI showed global asymmetry, skin thickening, and diffuse increased enhancement in right breast with non-enhancing areas consistent with small abscess collections (red arrow)