Blastoma is a type of cancer that arises from immature cells called blast cells. There are various synonyms for this term, including embryonal tumor, tumor of germ cells, and malignant neoplasm of blastomatous origin. Other related terms include neuroblastoma, a tumor that starts in the nervous system, and nephroblastoma or Wilms tumor, which is a cancer of the kidneys that often affects children. Blastomas can occur in different parts of the body, including the brain, kidney, liver, and muscle, among others. Treatment options for blastomas depend on the type and location of the tumor, as well as the patient's overall health and medical history.