Langerhans Cell Histiocytosis: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Langerhans Cell Histiocytosis?
A hematologist or oncologist (a blood or cancer doctor) usually leads care for Langerhans cell histiocytosis. For children, a pediatric oncologist (a children's cancer doctor) oversees a team of specialists. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is Langerhans cell histiocytosis?
Langerhans cell histiocytosis (LCH) is a rare disorder. Too many immune system cells called Langerhans cells build up in the body.
The extra cells usually form growths called granulomas. They can damage tissue in one or more places in the body.
Experts do not know if LCH is a form of cancer or a cancer-like disease. Doctors who treat cancer also treat LCH.
LCH is often found in childhood, usually between ages 2 and 3. It can appear at any age. It was once called histiocytosis X.
About 1 to 2 in 100,000 people have LCH. In 15 to 20 percent of cases it affects the lungs, liver, or blood-forming system. Damage there may be life-threatening.
Symptoms
Symptoms depend on where the cells build up. They vary widely from person to person.
- Bone: a lump or swelling over a bone, with pain. A bone may break.
- Skin: a raised rash with red, brown, or crusted areas. In babies, flaking of the scalp that looks like cradle cap.
- Mouth: swollen gums, mouth sores, or teeth that become uneven or fall out.
- Ears: ear drainage that does not stop.
- Pituitary gland: strong thirst and frequent urination, from a problem called diabetes insipidus. Growth may be slow.
- Lungs: a dry cough or shortness of breath.
- Liver and spleen: swelling in the belly, yellow skin and eyes, easy bruising or bleeding, and feeling very tired.
- Brain and nerves: loss of balance, trouble walking or speaking, headaches, or changes in behavior.
Causes and who gets it
Gene changes happen in the Langerhans cells during a person's life. A gene called BRAF is changed in about half of people with LCH. These changes are not inherited.
Risk factors can include smoking, infections as a newborn, and a personal or family history of thyroid disease. A parent who was exposed to certain solvents or to metal, granite, or wood dust at work is also a risk factor. Not everyone with a risk factor gets LCH.
How doctors diagnose it
Doctors ask about your health history and do a physical exam. A biopsy is used to diagnose LCH. In a biopsy, a small piece of tissue is removed and checked under a microscope.
Other tests can include blood tests, a urine test, X-rays, and CT, MRI, or PET scans. A test for BRAF gene changes may also be done.
Treatment
Treatment depends on which organs are affected and how many. For children, a pediatric oncologist leads a team of specialists.
LCH in organs such as the skin, bones, lymph nodes, or pituitary gland usually gets better with treatment. LCH in the spleen, liver, or bone marrow is harder to treat.
Some people only need to be watched. This is called observation. Young children with skin-only LCH are followed for many years because of a risk of diabetes insipidus.
When LCH affects only one area, such as a bone or the skin, local surgery may be used. These people need close follow-up for signs that it has spread.
Widespread LCH needs medicines to reduce symptoms and control the spread. Options include steroids and chemotherapy, which are drugs that stop cells from growing. Targeted drugs such as vemurafenib and dabrafenib are BRAF inhibitors, which block proteins needed for cell growth.
Adults with lung LCH should quit smoking. Lung damage gets worse over time in people who do not quit.
In many people, LCH goes away with the right treatment. Some problems, such as diabetes insipidus, can be permanent. Treatment can also cause late effects months or years later, such as hormone imbalance or hearing loss. People with LCH are watched for many years because it can come back.
When to see a doctor
Check with a doctor if you or your child has a lump or swelling over a bone, ear drainage that does not stop, or a skin rash that lasts. Strong thirst with frequent urination also needs a check.
In lung LCH, a collapsed lung can happen. It can cause chest pain or tightness, trouble breathing, and a bluish color to the skin.
Call 911 or go to the emergency room right away for severe trouble breathing, chest pain, or bluish skin.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can do a first exam, arrange first tests, and refer you to a cancer or blood specialist. They can also help coordinate care and long-term follow-up.
Common questions
Is Langerhans cell histiocytosis cancer?
Experts do not know if it is cancer. It is not known whether LCH is a form of cancer or a cancer-like disease. Doctors who treat cancer also treat it, and some cancer treatments work for LCH.
Is Langerhans cell histiocytosis inherited?
Usually not. It typically occurs in people with no history of the disorder in their family. A few families with several cases have been found.
Can Langerhans cell histiocytosis go away on its own?
Sometimes. It may go away on its own, especially if it affects only the skin. LCH of the lung can also go away or not get worse without treatment.
Sources
- National Cancer Institute - Langerhans Cell Histiocytosis Treatment (PDQ) - Patient Version
- MedlinePlus Genetics - Langerhans cell histiocytosis
- MedlinePlus - Histiocytosis
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
