Fig. 1

Ultrasound of a 28-year-old female diagnosed with idiopathic granulomatous mastitis, who presented with pain and swelling in the left breast. a, b Ultrasound showing an ill-defined irregular hypoechoic lesion with tubular tentacle-like extensions (red arrows). c Color flow imaging showing increased internal vascularity. d Histopathology shows Langhans type of giant cells admixed with inflammatory cells, predominantly lymphocytes (H&E × 100)