what is the pelvic calyceal
The bladder, renal pelvicalyceal system, ureters, and the proximal urethra are lined by urothelial mucosa, formerly called transitional mucosa. Typically, the pelvicalyceal system is involved first, spreading from the medullary region to the cortex. Intravenous pyelography, performed to rule out focal pelvicalyceal dilatation, revealed a focal space-occupying lesion with a mild displacement of upper pole calyces.