Source:http://linkedlifedata.com/resource/umls/id/C0227716
NCI: The inferior portion of the urinary bladder which is formed as the walls of the bladder converge and become contiguous with the proximal urethra. (NCI),NCI: The inferior portion of the urinary bladder which is formed as the walls of the bladder converge and become contiguous with the proximal urethra.