Source:http://linkedlifedata.com/resource/umls/id/C0279931
NCI: A disease in which malignant (cancer) cells are found in the part of the urethra (the tube through which urine leaves the body) that connects to the bladder (the organ that stores urine).,NCI: You can add as a definition this: A malignant neoplasm that affects the portion of the urethra that is close to the bladder.