Fig. 1
From: IgG4-related mastitis managed without excision or steroid therapy
Breast ultrasonography and MRI. A A breast ultrasonography showing an irregularly shaped 36-mm low echoic mass with abundant vascular signal in the upper left medial region. B Breast ultrasound showing no increase in the mass one year and eight months after the diagnosis of IgG4-RM. C Breast MRI showing an irregularly shaped contrast-enhanced mass