Rare Nephrology News

Disease Profile


Prevalence estimates on Rare Medical Network websites are calculated based on data available from numerous sources, including US and European government statistics, the NIH, Orphanet, and published epidemiologic studies. Rare disease population data is recognized to be highly variable, and based on a wide variety of source data and methodologies, so the prevalence data on this site should be assumed to be estimated and cannot be considered to be absolutely correct.


US Estimated

Europe Estimated

Age of onset

All ages





Autosomal dominant A pathogenic variant in only one gene copy in each cell is sufficient to cause an autosomal dominant disease.


Autosomal recessive Pathogenic variants in both copies of each gene of the chromosome are needed to cause an autosomal recessive disease and observe the mutant phenotype.


dominant X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome.


recessive Pathogenic variants in both copies of a gene on the X chromosome cause an X-linked recessive disorder.


Mitochondrial or multigenic Mitochondrial genetic disorders can be caused by changes (mutations) in either the mitochondrial DNA or nuclear DNA that lead to dysfunction of the mitochondria and inadequate production of energy.


Multigenic or multifactor Inheritance involving many factors, of which at least one is genetic but none is of overwhelming importance, as in the causation of a disease by multiple genetic and environmental factors.


Not applicable



Rare Cancers


Liposarcoma is a tumor that arises from fat tissue. This tumor often occurs in the thigh, legs, behind the knee, or in the abdomen, but it can be found in other parts of the body, in the retroperitoneum; and, less often, in the head and neck area. Their primary occurrence in the skin is rare. Because a liposarcoma may grow into surrounding tissues or organs, it is considered a malignant tumor.[1] The World Health Organization classification of soft tissue tumors recognizes 5 types of liposarcomas: Well differentiated, which includes the adipocytic, sclerosing, and inflammatory subtypes; dedifferentiated; myxoid; round cell; and pleomorphic. Most patients with liposarcoma have no symptoms until the tumor is large and invades the neighboring organs or tissues, causing tenderness, pain, or functional problems. Although surgical removal of the tumor is the curative treatment, some patients may benefit from chemotherapy and radiation.[2]


The treatment for liposarcoma depends on the type, size, and location of the tumor. Surgery to remove the tumor is often the first treatment. When the tumor is in the abdomen, it may be difficult to remove completely, especially if the tumor is growing near important organs that cannot be removed. If the entire tumor cannot be removed during surgery, radiation therapy may be used after surgery to kill any cancer cells that remain to reduce the chance of the tumor coming back (a recurrence). Chemotherapy is another treatment that can kill remaining cancer cells following surgery, though it is not usually used to treat low-grade sarcomas. [3] [4]

Sometimes radiation therapy or chemotherapy may be done prior to surgery to shrink the tumor; this may increase the chance of removing the whole tumor during surgery while limiting the impact to other organs. [3] [4]

FDA-Approved Treatments

The medication(s) listed below have been approved by the Food and Drug Administration (FDA) as orphan products for treatment of this condition. Learn more orphan products.


Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease

    Learn more

    These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

    In-Depth Information

    • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
    • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.


      1. Sarcoma Adult Soft Tissue Cancer. American Cancer Society. July 6, 2010; https://www.cancer.org/Cancer/Sarcoma-AdultSoftTissueCancer/DetailedGuide/sarcoma-adult-soft-tissue-cancer-soft-tissue-sarcoma. Accessed 2/14/2011.
      2. Schwartz RA. Liposarcoma. Medscape Reference. February, 2016; https://emedicine.medscape.com/article/1102007-overview.
      3. Adult Soft Tissue Sarcoma Treatment Health Professional Version. National Cancer Institute. January 24, 2011; https://www.cancer.gov/cancertopics/pdq/treatment/adult-soft-tissue-sarcoma/HealthProfessional. Accessed 2/14/2011.
      4. Soft Tissue Sarcoma. National Comprehensive Cancer Network. February 1, 2011; https://www.nccn.org/professionals/physician_gls/pdf/sarcoma.pdf. Accessed 2/14/2011.

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