Clear Cell Sarcoma: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Clear Cell Sarcoma?
A sarcoma specialist, a doctor who treats cancers of soft tissue, is one type of doctor who treats clear cell sarcoma. A pathologist studies cells from the tumor sample to find out what kind of tumor it is. 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 clear cell sarcoma?
Clear cell sarcoma is a type of cancer called soft tissue sarcoma. Soft tissues include muscle, tendons, fat, lymph and blood vessels, and nerves. The tumors occur most often in the arms, legs, feet, and hands. They can also grow in the torso, including the stomach and intestines. They have also been found in the genitals and head. The disease gets its name because the tumor cells look clear under a microscope. It is a rare type of sarcoma, making up 1% of sarcoma cases. It is most often found in teens and young adults in their 20s. The average age at diagnosis is 25 years old.
Symptoms
Many people with clear cell sarcoma do not have symptoms at first. Later, when the tumor gets larger, symptoms can include:
- A lump under the skin that is sometimes painful.
- Weight loss for no known reason.
- Fatigue.
- Night sweats.
Causes and who gets it
In clear cell sarcoma, chromosomes break apart and are put back together in the wrong way. Chromosomes are the structures in your cells that contain all your genes. This can cause cells to not work right. A gene called EWSR1 joins with a region called ATF1, creating a fusion gene called EWSR1/ATF1. This gene fusion happens in almost all cases of clear cell sarcoma. Clear cell sarcoma does not run in families.
How doctors diagnose it
Clear cell sarcoma is hard to diagnose. At first, some patients may be diagnosed with malignant melanoma of soft parts because the cells of both cancers look alike under a microscope. But certain genetic features that are very common in clear cell sarcoma are not found in melanoma. Doctors use scans such as MRI and CT to see where the tumor is and how big it is. They also check for signs that the tumor has spread to other parts of the body. A biopsy takes a small sample from the tumor with a needle. A pathologist studies cells from the sample under the microscope and does genetic tests to find out what kind of tumor it is. Doctors look for the gene change in the chromosomes to confirm that the cancer is clear cell sarcoma. Getting the correct diagnosis is very important to get the right treatment. It is important to go to a doctor who specializes in sarcoma.
Treatment
Treatment for each person will be unique. Surgery to remove the tumor and some healthy tissue around it is the best treatment for clear cell sarcoma. In some cases, an entire arm or leg may need to be amputated. If some cancer cells are left behind, there is a greater chance of the cancer coming back in the same spot. Or, it may spread to a different part of the body. Radiation therapy can be used before or after surgery if doctors think that surgery alone will not remove all the tumor cells. Even so, doctors do not know if radiation therapy will help you live longer. When surgery is not possible or when the cancer has spread, chemotherapy can be used to treat clear cell sarcoma. But chemotherapy does not seem to be an effective way to treat it.
When to see a doctor
A lump under the skin that is sometimes painful, weight loss for no known reason, fatigue, and night sweats can be symptoms once the tumor gets larger. It is important to go to a doctor who specializes in sarcoma. Getting the correct diagnosis is very important to get the right treatment.
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. NCI says it is important to go to a doctor who specializes in sarcoma.
Common questions
Is clear cell sarcoma serious?
Yes, the outlook is often poor because clear cell sarcoma often spreads quickly to other parts of the body and often comes back after treatment. Prognosis means the estimate of how a disease will affect you long-term. People tend to have a better prognosis when their tumors are smaller than 2 inches and can be removed with surgery. Studies estimate the 5-year survival rate is between 30% and 67%. Because there are so few patients, these rates may not be very accurate.
Does clear cell sarcoma run in families?
No, clear cell sarcoma does not run in families. The gene change happens when chromosomes break apart and are put back together in the wrong way.
Who gets clear cell sarcoma?
It is most often found in teens and young adults in their 20s. The average age at diagnosis is 25 years old. It is so rare that doctors do not know exactly how many people have it.
Is clear cell sarcoma hard to diagnose?
Yes, clear cell sarcoma is hard to diagnose. Some patients may first be told they have malignant melanoma of soft parts because the cells of both cancers look alike under a microscope. Genetic tests help doctors find out what kind of tumor it is.
Sources
- National Cancer Institute - Clear Cell Sarcoma
- National Organization for Rare Disorders - Clear Cell Sarcoma
- National Cancer Institute - Soft Tissue Sarcoma Patient Version
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.
