Breast cancer, a leading cause of global female mortality, demands comprehensive diagnostic and therapeutic strategies. This study delves into the nuanced realm of post-neoadjuvant chemotherapy breast cancer specimens, emphasizing the imperative need for pathologists to discern stromal and nuclear alterations adeptly. The investigation, encompassing 100 female patients with a mean age of 47.5 years, elucidates the demographic and clinicopathological parameters. Predominantly presenting as palpable lumps (85%), invasive ductal carcinoma emerged as the predominant histological type (98%). The primary focus of the study revolves around the morphological changes post-neoadjuvant chemotherapy, with a meticulous qualitative analysis encompassing stromal elements (fibrosis, elastosis, calcification) and nuclear features (pyknosis, hyperchromasia). Notably, the response to chemotherapy, classified by the International Union against Cancer criteria, delineates a substantial pathological complete response (55%), partial response (35%), and limited non-response (10%). The therapeutic landscape includes a majority of cases undergoing extensive chemotherapy cycles, primarily featuring the cyclophosphamide, doxorubicin, and paclitaxel regimen. Remarkably, this investigation unveils fibrosis (63%) and elastosis/collagenization (51%) as prevalent stromal changes, while pyknosis (58%) and hyperchromasia (48%) dominate nuclear alterations. In conclusion, this retrospective study provides a comprehensive overview of post-neoadjuvant chemotherapy breast cancer specimens, shedding light on the intricate interplay of clinical parameters, treatment responses, and histopathological changes. The findings underscore the pivotal role of pathologists in accurately diagnosing and grading tumors in the evolving landscape of breast cancer management.
Keywords: Breast cancer; Fibrosis; Histomorphological; Neoadjuvant chemotherapy; Pathological complete response; Pyknosis.
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