Tumor or tumour literally means "swelling", and is sometimes still used with that meaning. Tumor meaning swelling is one of the five classical characteristics of inflammation. However, the term is now primarily used to denote abnormal growth of tissue. This growth can be either malignant or benign. It is similar in meaning to a neoplasia.

eMedicine: Rhabdoid Tumor of the Kidney - Article by Jeffrey S Dome, MD about this aggressive pediatric tumor. Provides an introduction to disease, history, causes, imaging, procedures, staging, medication, and treatment options.
Meta Description: [ Malignant Rhabdoid Tumor - Introduction Malignant rhabdoid tumor (MRT) is one of the most aggressive and lethal malignancies in pediatric oncology. MRT was initially described in 1978 as a rhabdomyosarcomatoid variant of a Wilms tumor because of its occurrence in the kidney and because of the r... ]
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