What Is Lipoma? Symptoms, Causes, Diagnosis, Treatment, and Prevention

A lipoma is a benign lump of fatty tissue that usually lies between your skin and the underlying muscle. And while finding any lump on your body can be scary, lipomas are most likely harmless. However, they still need to be checked by your doctor, just to be safe.

If you have a lipoma, you are not alone: They are the most common soft tissue tumor found in adults, according to the American Academy of Orthopaedic Surgeons. (1) It’s possible to have more than one lipoma, and they are slightly more likely to occur in men than in women. (1)

A lipoma is likely to feel doughy or rubbery to the touch; you may even be able to move it around a bit with your finger. Lipomas are generally not painful, and they don’t produce symptoms. One exception: A person with a lipoma may experience pain if the lipoma is pressing on nerves or contains blood vessels. (2)

What’s crucial (and reassuring) to know is that lipomas are not cancerous. Unless a lipoma is growing or bothering you in some way, there is no need to take further action once you get it checked out. Your doctor will make sure to monitor the lipoma.

Lipomas can form anywhere on the body, but you’re most likely to find them on your torso, shoulders, neck, and arms. They tend to grow slowly and generally don’t get any bigger than 2 inches across, although some may grow larger than that.

Medical experts don't know what causes a lipoma, but some think it's a response to a physical trauma. (3) Others think that the lipoma already exists and is brought to light because of the injury.

Here are some possible risk factors:

• Lack of ExerciseAs with many things, being physically active may protect you. Some doctors believe that lipomas occur more often in inactive people. (1)
• GeneticsLipomas often run in families, so genes may play a role.
• AgeThough lipomas can develop in anyone, they are most likely to appear in middle-aged adults between age 40 and 60.
• Certain Medical ConditionsA person may develop one or more lipomas if they have Gardner syndrome (an inherited condition that causes benign and malignant tumors to form), adiposis dolorosa, familial multiple lipomatosis, or Madelung disease (seen mostly in men who are heavy drinkers).

您的医生将接受您的病史并进行身体检查。但是在某些情况下，他们可能想通过使用这些测试筛选来排除其他问题：（1，4,5)

• X-rays
• Computerized tomography scans
• Magnetic resonance imaging scans
• 超声波
• Biopsies

In most cases, a biopsy isn’t necessary. But your doctor may want to take a small sample of the lump to be examined under a microscope.

The goal of these screening methods is to rule out liposarcoma, a rare cancer of the fatty tissue. Unlike lipomas, liposarcomas are often painful, grow quickly, and cannot be moved around with a finger.

Prognosis of Lipoma

脂肪瘤的前景通常是很好的。除非the lipomas hurt or continue to grow or change, you won’t need any treatment other than making sure your doctor takes a look during your regular physical exam.

People with lipomas are not more likely to develop liposarcoma. Atypical lipomas may turn into liposarcoma, but it is rare. (1) Atypical lipomas tend to be larger and located in an extremity (like the arms), rather than, say, the torso. (6)

一旦脂肪瘤被外科手术切除，它很可能不会恢复。如果脂肪瘤位于不可见的地方，并且不痛苦，许多人可能会选择与脂肪瘤相处。

除非您困扰您，否则通常不需要治疗脂肪瘤。但是，您的医生会建议安排定期检查，以确保肿瘤不会以任何方式增长或变化。

If the lipoma is bothering you, is uncomfortable, or is growing, your doctor may suggest having the lipoma removed.

The only treatment that will completely remove the lipoma is surgery. If you do choose to have the lipoma removed, it makes sense to do it while it is still small, since the larger it gets, the more complicated it is to remove. (4) A local anesthetic is typically used to numb the area before surgery, though larger lipomas may call for general anesthesia.

Liposuction may also be used. In this procedure, the lump will be withdrawn through a needle and into a large syringe. According to the Cleveland Clinic, liposuction is associated with a higher rate of recurrence. (2)

药物选择

Steroid injections are sometimes used to shrink the lipoma, but they probably won’t eliminate it completely. (7)

Alternative and Complementary Therapies

There are no known clinically proven and effective alternative remedies for getting rid of lipomas.

Prevention of Lipoma

According to the American Academy of Family Physicians, there is no known way to prevent lipomas from forming. (8)

Lipomas are typically harmless, and the good news is they tend to stay that way. Depending on size and location, however, they may press on organs and cause气促或者constipation。(9,10)

There may be complications from their removal.

Lipomas are the most common fatty tumor found in adults and are likeliest to show up in middle age, between age 40 and 60. Their incidence is 2.1 per 1,000 individuals each year. (4) They may affect 1 percent of the population. (4) They are slightly more common in men than women. Five percent of people with lipomas have more than one of them, according to StatPearls. (4)

While lipomas are hardly ever cancerous, it’s important to get them checked out so that your doctor can make sure you don’t have liposarcoma.

And while it’s extremely rare, lipomas can sometimes be associated with certain disorders such as multiple hereditary lipomatosis, Gardner syndrome, adiposis dolorosa, and Madelung disease.

许多主要的医疗中心和医疗组织在其网站上提供有关脂肪瘤的建议和信息：

• John Hopkins Medicine
• Mayo Clinic
• 克利夫兰诊所
• OrthoInfo(from the American Academy of Orthopaedic Surgeons)