Figure 1B.

Sagittal sections of hydronephrotic kidneys, hydroureters and interior of the hypertrophied bladder showing trigone.

Renal pelvis and calyces are markedly dilated; pyramids and medulla are attenuated; bladder shows trabeculated anterior wall; both ureterovesical junctions are patent and probed; urethral orifice was patent and probed

RPR: Dilated right renal pelvis; RPL: Dilated left renal pelvis; RU: Right hydroureter; LU: Left hydroureter; TG: Trigone; RUO: Right ureteric orifice; LUO: Left ureteric orifice; UO: Urethral orifice.