A rare soft tissue sarcoma characterized by a high-grade lesion occurring almost exclusively in adults composed of bizarre polygonal round and spindle cells with evidence of skeletal muscle differentiation. Patients usually present with a rapidly growing painful mass located in the deep soft tissues of the extremities but also other anatomic regions. Prognosis is generally poor.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version July 2026
Newly diagnosed with
Pleomorphic rhabdomyosarcoma?
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Advocacy Organizations
Association Aux Pas du Coeur – Côte d’ivoire
Our organization wants to raise awareness and recognition of rare diseases in Ivory Coast. Our mission is to: Raise awareness and campaign to help with the diagnosis and free therapeutic care of patients. Request and/or contribute to actions relating to the training of the medical profession to be able to make a final diagnosis and ensure continuous monitoring of patients easily.
Born a Hero, Research Foundation
Our mission is to accelerate innovation and research to improve the quality of life for patients with FGFR Syndromes, including Pfeiffer Syndrome.
Fundacion Powerchair Football Argentina
To develop Powerchair Football in Argentina in order to integrate people with motor disabilities (SMA, Duchenne muscular dystrophy, Achondroplasia, Rare Diseases) into sports practice and to promote their social inclusion, based on empowerment, independence, and the creation of new bonds and friendships.
Mitchell’s Fund
Founded in 2016 in memory of Mitchell Bays Turner, who lost his life to a rare form of leukemia, Mitchell’s Fund provides targeted mental health services to some of Charlotte's most vulnerable families: those experiencing the trauma of a childhood diagnosis of a terminal or life-threatening illness. Our primary goal is to provide counseling and play therapy to sick children and families at no cost
Neuromuscular Disease Foundation
The Neuromuscular Disease Foundation's (NDF) mission is to enhance the quality of the lives of people living with GNE Myopathy (also known as HIBM) through advocacy, education, outreach, and funding clinical research focused on treatments and a cure.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.