neuroblastoma

Definition of neuroblastoma
National Cancer Institute

neuroblastoma

(NOOR-oh-blas-TOH-muh)
A type of cancer that forms from immature nerve cells. It usually begins in the adrenal glands but may also begin in the abdomen, chest, or in nerve tissue near the spine. Neuroblastoma most often occurs in children younger than 5 years of age. It is thought to begin before birth. It is usually found when the tumor begins to grow and cause signs or symptoms.

Source: NCI Dictionary of Cancer Terms