Pleomorphic Rhabdomyosarcoma, also known as PRMS, is a rare type of soft tissue sarcoma that can occur in any part of the body. It is characterized by the presence of large, abnormal cells that can take on various shapes and sizes, hence the term "pleomorphic". The word "rhabdomyosarcoma" refers to the fact that these cells are of muscle origin.
Although PRMS is a very specific term, there are other synonyms that can be used to describe this type of cancer. These include "undifferentiated sarcoma" and "pleomorphic sarcoma", both of which indicate the presence of abnormal, poorly differentiated cells. Another synonym is "high-grade sarcoma", which refers to the aggressive nature of this cancer and its potential to metastasize quickly. Regardless of the terminology used, PRMS remains a challenging diagnosis with few effective treatment options.