Fig. 1

Breast segmentectomy, axillary approach, and connecting incision. a Skin markings. Crossed lines: triangles to be removed. Breast segment: extensive DCIS with invasive component. Hook-wire localisation needle inserted into invasive mass (black oval) under ultrasound guidance. b Breast segmentectomy: triangular full-thickness excision in a radial fashion. c Excision of axillary triangle (skin and fat tissue) at the superior area of axilla. d Incision connecting the bases of triangles (upper quadrants). Easy approach to the axillary lymph nodes