<unk><unk>  (UPJ)<unk>  is a blockage in the area that connects the renal pelvis (part of the kidney) to one of the tubes (ureters) that move urine to the bladder.
Ureteropelvic junction obstruction
Bladder outlet obstruction
Ejaculatory duct obstruction
Urethral stricture
Urinary bladder hernia
Urethral caruncle
Duplicated collecting system
Vesicoureteral reflux