Embryonal rhabdomyosarcoma is a rare type of cancer that occurs in the soft tissue of the body, usually in children and teenagers. It is considered the most common form of rhabdomyosarcoma, a type of cancer that originates in skeletal muscle tissue. While there are no exact synonyms for the term "embryonal rhabdomyosarcoma," it may also be referred to as alveolar rhabdomyosarcoma, botryoid rhabdomyosarcoma, spindle cell rhabdomyosarcoma, or embryonic sarcoma. Each of these terms describe different variations of the cancer based on the appearance of the cells under a microscope. It is important to consult a medical professional to determine an accurate diagnosis and treatment plan for any type of rhabdomyosarcoma.