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Enucleation based on the surgical capsule. (A) Enucleation of the middle lobe; (B) Preserving the physiological gradient of the bladder neck (after enucleation of the middle lobe); (C) Enucleation of the left lobe; (D) Enucleation of the right lobe; SC, surgical capsule; BN, bladder neck; RL, right lobe; LL, left lobe.
