How is endoscopic anatomy of prostate?

Inside to Outside: • Trigone and ureteral orifices, • The median intravesical lobe, • The hypertrophied lateral lobes, • The external sphincter and the membranous urethra. • Verumontanum is the most important marker, the safety limit for the external sphincter. • The external sphincter begins just below the verumontanum, consisting of circular bands that fold when the cystoscope passes.