What does "Substernal extension on the left" 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.
"Substernal extension on the left" is a medical term used to describe a situation where something, often a part of the body like an organ or a growth, extends or reaches below the sternum (the flat bone in the middle of the chest) on the left side. This could be due to a variety of reasons, such as an enlarged organ or a tumor. The term does not specify what is extending, just where it is located. It's a way for doctors to describe where they see something unusual in medical imaging or during a physical examination.
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