Fig. 4
From: Breast involvement in granulomatosis with polyangiitis: a case report
Right breast ultrasound shows an irregular, ill-defined hypoechoic lesion with non-parallel orientation showing posterior acoustic shadowing in the lower inner quadrant of the right breast (a). No evidence of internal vascularity (b). Features were highly suspicious of malignancy and the lesion was characterized as U- BIRADS 4c