Pathological complete response after neoadjuvant cyclin-dependent kinase 4/6 inhibitor and neoadjuvant endocrine therapy in locally advanced hormone receptor-positive breast cancer
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Date
2024-10
Journal Title
Journal ISSN
Volume Title
Publisher
Mansa STM Publishers
Abstract
Breast cancer (BC) comprises different molecular subtypes, each having its own individual prognostic factors and thus having a distinct treatment algorithm. With the advent of cyclin-dependent kinase 4/6 (CDK 4/6) inhibitors, hormone receptor-positive (HR+) BC now has an additional targeted therapeutic option apart from endocrine therapy. As of now, CDK 4/6 inhibitors are Food and Drug Administration (FDA) approved in the metastatic and adjuvant settings. However, for the neoadjuvant setting, systemic chemotherapy is the standard of care. Systemic chemotherapy may not be a suitable option for elderly and frail patients in terms of associated side effects. Thus, due to tailored oncological management, many phase II and III trials of neoadjuvant CDK 4/6 inhibitors are ongoing. CDK 4/6 inhibitors are better tolerated than systemic chemotherapy and have less reported adverse events. Here, we report a case of locally advanced BC (HR+) achieving pathological complete response from neoadjuvant CDK 4/6 inhibitor with minimal toxicity. Thus, CDK 4/6 inhibitors appear to have a promising and upcoming role in the neoadjuvant setting for hormone-positive BC.
Description
Keywords
Breast cancer, Hormone-positive breast cancer, pCR, Locally advanced breast cancer, Neoadjuvant cyclin-dependent kinases 4/6 inhibitor
Citation
Mahajan A, Majumdar SK, Barik SK, Das DK, Parida DK, Patnayak R, Baisakh MR.. Pathological complete response after neoadjuvant cyclin-dependent kinase 4/6 inhibitor and neoadjuvant endocrine therapy in locally advanced hormone receptor-positive breast cancer . Indian Journal of Case Reports. 2024 Oct; 10(10): 322-324