Madelung Disease (Multiple Symmetric Lipomatosis)

What is Madelung disease?

Madelung disease, also called multiple symmetric lipomatosis (MSL), is a disorder of fat tissue. Unlike ordinary lipomas, which are single, soft lumps in a thin capsule, the fat in Madelung disease is diffuse and unencapsulated. It infiltrates between muscles and around nerves and blood vessels, which makes it hard to remove completely.

It was described by Otto Madelung in 1888 and by Launois and Bensaude in 1898. It is rare, estimated at around 1 in 25,000 people in Mediterranean countries such as Italy, and much less common elsewhere. Men are affected far more often than women.

Types and appearance

The fat grows slowly over months to years, then may stabilize. The masses are usually painless and soft. The face, forearms and lower legs typically stay lean, which makes the upper body look disproportionately large.

Causes

The exact cause is not known. Current evidence points to:

• Alcohol: 60% to 90% of people with Madelung disease have long-term heavy alcohol use. Alcohol is thought to impair how fat cells respond to adrenaline-driven fat breakdown and to damage mitochondria.
• Mitochondrial dysfunction: some families carry mutations in mitochondrial DNA (for example the MERRF-associated mutation) or in the MFN2 gene, and some patients do not drink at all.
• Abnormal brown fat: the fat cells in MSL resemble brown fat that has lost its normal regulation.

Associated conditions

People with Madelung disease often have other health problems linked to alcohol or the underlying metabolic defect:

• alcoholic neuropathy or other peripheral and autonomic neuropathy (numbness, burning feet, dizziness on standing), present in a large share of patients
• alcohol-related liver disease
• high triglycerides, high uric acid and gout
• insulin resistance and diabetes
• underactive thyroid
• a higher risk of cancers of the mouth, throat and airways, linked to alcohol and tobacco

Symptoms and complications

• visible, symmetrical swelling of the neck and shoulders
• reduced neck movement and posture problems
• heaviness and discomfort from the weight of the masses
• sleep apnea or snoring when fat surrounds the airway
• difficulty swallowing, voice changes or breathing difficulty from fat in the deep neck and chest
• compression of veins in the neck or chest, rarely
• emotional distress related to appearance

How Madelung disease is diagnosed

Diagnosis is usually made from the typical appearance and history. Tests then assess its extent and look for associated problems:

• CT or MRI scan: shows symmetric, unencapsulated fat and how far it extends around the airway, esophagus and blood vessels. It also helps rule out liposarcoma, a rare fat cancer.
• Biopsy: only if one area looks atypical, grows fast or becomes firm.
• Blood tests: liver function, blood sugar, lipids, uric acid, thyroid function.
• Nerve conduction studies if neuropathy is suspected.
• Sleep study if sleep apnea is suspected.

Other causes of increased neck and upper body fat that doctors consider include Cushing syndrome (steroid excess, with a round face and thin skin), ordinary obesity, HIV-associated lipodystrophy, Dercum disease (painful fatty deposits), and enlarged lymph nodes or thyroid.

Treatment

There is no medicine that reliably shrinks the fat. Management combines:

Stopping alcohol

Complete abstinence is the most important step. It usually stops new growth and may lead to a small reduction, though the masses rarely disappear. It also treats neuropathy and liver disease. Support through counseling, medicines for alcohol use disorder and support groups improves success.

Surgery

• Surgical excision (lipectomy): removes large masses, particularly those compressing the airway or causing deformity. It can be done in stages.
• Liposuction: less invasive, with smaller scars, useful for less fibrous areas, but removes less tissue.

Because the fat is not encapsulated and weaves around structures, complete removal is difficult, and surgery carries risks of bleeding and nerve injury in the neck. Masses regrow in many patients, especially if drinking continues.

Other measures

Weight management does not shrink MSL fat significantly, as these deposits do not respond to calorie restriction like normal fat. Some small studies have tried salbutamol or injection lipolysis, but these are not established treatments.

Outlook

Madelung disease is benign, and the fat itself does not turn into cancer. Long-term health depends mostly on associated problems: continued alcohol use, liver disease, neuropathy, heart and metabolic disease, and alcohol-related cancers. People who stop drinking generally do better.

Frequently asked questions

What causes Madelung disease?

The exact cause is unknown. Most people affected have long-term heavy alcohol use, and alcohol is thought to disrupt fat breakdown and damage mitochondria in fat cells. Some people have inherited mitochondrial or MFN2 gene changes and develop it without drinking.

Is Madelung disease dangerous?

The fat is not cancerous, but it can be dangerous when it compresses the airway, causing breathing problems or sleep apnea, or the esophagus, causing swallowing problems. Associated alcohol-related liver disease and neuropathy can also be serious.

Does Madelung disease go away if you stop drinking?

Stopping alcohol usually stops the fat from growing and may shrink it slightly, but the masses rarely disappear completely. Surgery or liposuction is needed to remove them, and stopping alcohol lowers the chance of regrowth.

How is Madelung disease different from lipomas?

Ordinary lipomas are single or few soft lumps enclosed in a thin capsule that are easy to remove. In Madelung disease, the fat is unencapsulated, spreads symmetrically across the neck, shoulders and upper arms, and grows between muscles, which makes removal harder.

Can women get Madelung disease?

Yes, but it is much less common. Women more often have type 2, with fat on the upper back, hips and thighs that can look like general obesity. As in men, alcohol is often involved but not always.