A rapidly rising form of breast cancer that’s harder to detect on mammograms now accounts for more than 10% of all U.S. breast cancer cases, according to the American Cancer Society. The report found that invasive lobular carcinoma — which develops in the milk-producing glands — is increasing about 3% each year, more than triple the rate of other types. Once considered rare, cases have doubled since the 1970s and are climbing fastest among women under 50.
Unlike typical breast cancers that form lumps, lobular cancer spreads in thin, web-like patterns that can make it difficult to spot on mammograms. Doctors say women should watch for subtle changes, such as breast firmness, fullness, or redness. While early detection offers a five-year survival rate of 99%, outcomes worsen significantly if the cancer spreads, with survival rates dropping by half after 10 years.
Experts encourage regular screenings and the use of additional imaging tools like ultrasound or MRI when necessary. Maintaining a healthy weight, exercising, and limiting alcohol can also help lower risk. Early detection remains key — and knowing what to look for can save lives.
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