Ki-67 index changes and their association with PR status changes and tumor invasion: a real-world study of patients with non-pCR breast cancer after neoadjuvant chemotherapy
Neoadjuvant chemotherapy (NAC) represents a crucial treatment strategy designed to reduce tumor size and facilitate surgical intervention. In patients who do not achieve a pathological complete response (pCR) following NAC, the alteration of receptor status has been observed, but their clinical implications remain...