What is a radical neck dissection? when is it done?

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What is a radical neck dissection? The surgeon removes a block of tissue from the collarbone to the jaw and from the front to the back of the neck. The large muscle on the side of the neck that is used for rotating, flexing or extending the neck is also taken out, along with the major vein on the side of the neck. Sometimes, a less drastic operation, called a supraomohyoid neck dissection is done. This takes out only the lymph nodes, the tissue surrounding the nodes and a muscle at the front of the neck. Another technique, called a functional neck dissection, saves the muscles of the neck, taking out only the lymph nodes and tissues surrounding them.
What kind of incision is made with a radical neck dissection? The incision depends upon what the surgery is for. It can run from below the ear to the collarbone. Everything in the front of the neck on one side or on both sides may be removed. This may include the lymph nodes, blood vessels, nerves, and the salivary gland under the jawbone.

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I've noticed a bloody discharge from the nipple.

This can be significant. But first it is necessary to be sure that it is really blood and not a glandular secretion. Therefore, the fresh discharge from the nipple is put onto a slide and looked at under the microscope. If it contains red blood cells, then it is blood.
Bloody discharges can come from excessive growth of normal or exuberant tissue in the breast ducts; this is an innocent phenomenon. Or it can be the first symptom of tumor or cancer, which is sometimes too small even to be felt. Usually a biopsy is required to make an accurate diagnosis.

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