Kimura Disease
What is Kimura Disease?
Kimura disease is a rare chronic inflammatory disorder that affects soft tissue under the skin. It causes painless lumps or nodules, usually on the head and neck. These lumps grow slowly over time and rarely go away on their own.
The condition is most common in young Asian men between ages 20 and 40. It also causes swollen lymph nodes, especially around the ears and jaw. Kimura disease is not cancerous and does not spread like cancer does. However, it can persist for years without treatment.
People with Kimura disease often have high levels of certain white blood cells called eosinophils. These cells are part of your immune system and help fight infections. When too many eosinophils build up, they can cause inflammation and tissue changes. Blood tests can detect these elevated eosinophil levels and help confirm the diagnosis.
Symptoms
- Painless lumps under the skin, usually on the head, neck, or behind the ears
- Swollen lymph nodes in the neck and around the jaw
- Itchy skin over the affected areas
- Swelling of the salivary glands near the ears
- Rarely, kidney problems that cause protein in the urine
- Allergic symptoms like runny nose or watery eyes
Most people notice the lumps first. The swelling develops gradually over months or years. Some people have no other symptoms besides the visible bumps and swollen glands.
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Causes and risk factors
The exact cause of Kimura disease remains unknown. Researchers believe it may be an unusual immune system response to an unknown trigger. Some studies suggest it could be an allergic or autoimmune reaction. Others think a past infection might trigger the inflammatory process that continues long after the infection clears.
Risk factors include being male, being of Asian descent, and being between ages 20 and 40. The condition is rare outside of Asia. Family history does not appear to play a major role. Unlike many inflammatory conditions, Kimura disease does not seem linked to lifestyle factors like diet or exercise.
How it's diagnosed
Doctors diagnose Kimura disease through a combination of physical examination, blood tests, and tissue biopsy. The physical exam reveals characteristic painless lumps and swollen lymph nodes. Blood tests show elevated eosinophils, a type of white blood cell. High levels of immunoglobulin E, an antibody involved in allergic reactions, are also common.
A tissue biopsy is needed to confirm the diagnosis. The doctor removes a small sample of the lump and examines it under a microscope. The tissue shows specific patterns of inflammation and eosinophil buildup. Rite Aid offers blood testing at Quest Diagnostics locations to measure eosinophil levels. These tests help monitor the condition over time and guide treatment decisions.
Treatment options
- Surgical removal of the lumps, though they often come back
- Corticosteroid medications to reduce inflammation
- Radiation therapy to shrink persistent lumps
- Immunosuppressive drugs for cases that do not respond to steroids
- Antihistamines for itching and allergic symptoms
- Regular monitoring of kidney function if protein appears in urine
- Watchful waiting if lumps are small and cause no symptoms
Concerned about Kimura Disease? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
No, Kimura disease is not contagious. You cannot catch it from or spread it to other people. It is an inflammatory condition caused by your own immune system, not by bacteria or viruses that can be transmitted.
Kimura disease is not cancerous and does not turn into cancer. The lumps are benign, meaning they do not spread to other parts of the body. However, a biopsy is needed to rule out lymphoma, which can look similar but requires different treatment.
The reason for this pattern is not fully understood. About 80 percent of cases occur in Asian men. Genetic factors may make certain populations more susceptible. However, people of any ethnicity or gender can develop the condition.
Eosinophils are white blood cells that help fight parasites and play a role in allergic reactions. In Kimura disease, these cells accumulate in the affected tissue and in the bloodstream. The elevated eosinophil count is one of the key markers doctors look for when diagnosing this condition.
Kimura disease lumps rarely disappear without treatment. They tend to persist for years and may slowly grow larger. Some people choose watchful waiting if the lumps are small and painless. Others prefer treatment to remove the lumps or shrink them with medication.
Your doctor will recommend a monitoring schedule based on your symptoms and treatment. Regular blood tests help track eosinophil levels and kidney function. Many people get tested every 3 to 6 months during active treatment and less often once the condition is stable.
Yes, about 10 to 20 percent of people with Kimura disease develop kidney problems. The most common issue is nephrotic syndrome, which causes protein to leak into the urine. Regular urine and blood tests can detect kidney involvement early, when treatment is most effective.
Surgery removes the lumps but does not address the underlying inflammation. The lumps often return after surgery, sometimes in the same location. Medications like corticosteroids reduce inflammation throughout the body and may prevent new lumps from forming, but they have side effects with long-term use.
No specific diet has been proven to help Kimura disease. Because it involves the immune system, some doctors suggest an anti-inflammatory eating pattern with plenty of vegetables, fruits, and omega-3 fatty acids. However, these dietary changes have not been studied specifically for this condition.
Yes, Kimura disease frequently recurs even after successful treatment. The recurrence rate is high with both surgery and medication. Most people need long-term monitoring and may require repeated treatments over many years to manage the condition.