A significant portion of women diagnosed with breast cancer in India experience metastasis, according to a recent study published in The Lancet Regional Health Southeast Asia. The analysis, covering over 76,000 patients, indicates that nearly 13% had cancer that spread from its original site to other parts of the body.
Bone emerged as the most frequent site for this secondary cancer growth. The study also highlighted an increasing trend, noting a higher risk of metastasis in diagnoses between 2015-2020 compared to 2009-2014. Factors associated with a greater likelihood of metastasis included larger tumor size (over three centimeters) and higher tumor grade.
Broader Landscape of Breast Cancer in India
The findings align with a broader concern regarding the epidemiology of breast cancer in the country. While incidence rates in India may be lower than in some Western nations, mortality rates are comparable, suggesting potential challenges in early detection and treatment. Research from 2017 noted that breast cancer had surpassed cervical cancer as the leading cause of cancer death among Indian women, although cervical cancer remains more common in rural areas.
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Studies analyzing data from the 'National Cancer Registry Programme' have consistently pointed to the issue of diagnosis at later stages. For instance, one report indicated that patients diagnosed with local-stage cancer have a significantly higher five-year survival rate—4.4 times greater—than those diagnosed with distant-stage cancer. This underscores the critical need for improved diagnostic completeness and accessible healthcare initiatives to facilitate earlier identification and management of the disease.
Risk Factors and Prevention Efforts
While extensive data on national-level factors associated with metastatic breast cancer remains limited, research has explored various risk factors. These include established and suspected influences on breast cancer aetiology, with ongoing investigations into anthropometric, hormonal, reproductive, and genetic predispositions among Indian women. The need for robust cancer control strategies, grounded in accurate epidemiological knowledge, is frequently emphasized by researchers and public health advocates. The increase in breast cancer incidence over recent decades in India has been partly attributed to lifestyle changes and the relative limitations in clinical facilities.
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