Substernal extension

What does "Substernal extension" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

Substernal extension is a term used in medicine to describe a situation where something, often a growth like a tumor or goiter, extends or spreads beneath the breastbone, also known as the sternum. This area is located in the middle of your chest, where your ribs connect. The term is often used to describe the size or location of a growth, which can help doctors determine the best course of treatment.

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