Fig. 2

Ultrasound-assisted throughout the management. A Preoperative ultrasonography was used to locate the abscess cavity; B Ultrasound-guided placement of the arthroscopic sheath (red arrow); C The abscess cavity (red arrow) and its adjacent abscess cavity (blue arrow) was surgically cleared (red arrow); D The septum between the abscess cavities was opened under ultrasound guidance; E One or two drainage tubes was placed for continuous drainage; F Ultrasound examination on the first day after surgery showed the drainage tube in the original abscess cavity (red arrow); G Ultrasonography was performed after the drainage tube was removed. H Breast appearance at 2 weeks postoperatively