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Hard Lump on Sternum: Common Causes, Symptoms, and When to See a Doctor in 2026

"Discovering a hard lump on your sternum (breastbone) can naturally trigger anxiety, as many people immediately associate chest-area abnormalities with severe systemic conditions. However, the sternum is a complex anatomical structure composed of bone, cartilage, and joints that interface with the ribs and clavicles, giving rise to numerous benign, inflammatory, and structural anomalies. Navigating these symptoms requires clear clinical context, an understanding of underlying etiologies, and precise criteria for professional evaluation. Anatomical Context and Diagnostic Overview of Sternum Abnormalities The sternum consists of three primary pa..."

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