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What is a lipoma?

A lipoma is a soft fatty lump. It is a benign (noncancerous) growth made up from fat cells that clump together. A lipoma can occur in any part of the body where there are fat cells.

Lipomas typically feel soft and can be felt to move slightly under your skin when you press on them.

Lipomas under the skin are the most common

Lipomas often form in the fatty tissue under the skin. These are also the most noticeable ones as they look and feel like soft, dome-shaped lumps under the skin. They vary in size from pea size to several centimeters in diameter. The most common sites where lipomas develop are on the shoulders, the chest and the back, but other areas of the skin can develop a lipoma.

Other parts of the body

Lipomas can less commonly form inside the body too. However, in most of these cases you will not be aware that you have a lipoma as you cannot see them and they rarely cause any problems.

Who gets lipomas and how common are they?

Anyone can develop a lipoma at any age. Lipomas are common - about 1 in 100 people develop one or more lipomas. Some people inherit a tendency to develop lipomas and may have several on different parts of the body. Sometimes as many as 20 or more develop. However, it is more common to develop just one or two.

Lipomas can occur in people who are normal weight as well as people who are overweight.

What are the symptoms of a lipoma and are they harmful?

In themselves, lipomas are not serious and most lipomas cause no symptoms or problems. They grow very slowly. Sometimes a lipoma under the skin can be unsightly if it grows to be several centimeters across. Rarely, a lipoma may press on another structure and cause problems. For example, if one presses on a nerve it may cause pain. Also, rarely, a lipoma may develop in the gut wall and cause problems such as pain or a blockage of the gut.

There is a condition called familial multiple lipoma in which groups of fat cells occur under the skin and then produce multiple fatty lumps. This is an uncommon condition and runs in families.

Do I need any treatment for a lipoma?

Some people want lipomas that are unsightly to be removed for cosmetic reasons. For example, if they occur on your face. Occasionally, a lipoma needs to be removed if it is causing symptoms such as pressure symptoms. Sometimes a lipoma inside the body is removed to look at under the microscope to make sure the growth that had been detected is a lipoma and not something more serious.

Lipoma Operation

For a lipoma that forms under the skin, usually it can be removed by a simple minor operation. Some local anaesthetic is injected into the skin over the lipoma. Once the overlying skin is numbed by the local anaesthetic, an incision (cut) is made over the lipoma. The lipoma is then removed and cut away from the underlying tissue. The wound is then stitched up. A fine scar will be left.

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