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 ORIGINAL ARTICLE
Year : 2022  |  Volume : 59  |  Issue : 2  |  Page : 257-262

Oligometastatic breast cancer: An institutional analysis


1 Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi, India
2 Department of Oncology, All India Institute of Medical Sciences, New Delhi, India
3 Department of Radiation Oncology, All India Institute of Medical Sciences, New Delhi, India
4 Department of Pathology, All India Institute of Medical Sciences, New Delhi, India

Correspondence Address:
Ajay Gogia
Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijc.IJC_169_20

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Introduction: Oligometastatic represents a distinctive subset of metastatic breast cancer (MBC). Incidence has been reported, in 1–5% of all newly diagnosed MBC. Literature is very sparse, especially from India. Material and Methods: We have ambispectively screened 500 patients of upfront female MBC between the period of January 2013 and August 2018 at Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi and 120 patients of oligometastatic breast cancer (OMBC) were included for analysis. Clinical, pathological, receptor status (ER estrogen receptor, PR progesterone receptor, and HER2/neu human epidermal growth factor), radiological, treatment, and survival details were recorded. Results: The median age of presentation was 50 (range 22–78) years. One organ was involved in 96 (80%) patients, and two organs were involved in 36 (20%) patients. ER and/or PR was positive in 48 (40.0%), ER/PR, and HER2/neu were positive in 28 (23.3%) cases. Only HER2/neu was positive in 21 (17.5%), and triple negativity was seen in 23 (19.2%) patients. Ninety-four (78.3%) patients received neoadjuvant therapy, and 12 (10%) patients underwent conservative breast surgery. The overall response rate at the metastatic site was 74.1%, and a complete response was seen in 42.5% of patients. Median progression-free survival (PFS) for the cohort was 25.43 months. The estimated PFS at 2 years and, at 5 years, was 54.6% and 21.6%, respectively. The hormone receptor positivity, bone metastasis, and patients with surgery after neoadjuvant chemotherapy (NACT) had a statistically significant better PFS on multivariate analysis. In a subset analysis of HER2/neu receptor-positive patients, who received targeted therapy showed better PFS compared to those who did not receive. Conclusion: The incidence of OMBC is 24% of the total MBC. The patients with OMBC who have hormone receptor-positive, bone-only metastasis, and surgery after NACT show a better outcome.






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