Aim: compare safety and efficacy and adverse events of endoscopic enucleation of large prostate using hot knife electrode (needloscopic enucleation) versus the standard vaporization electrode ( vapoenucleation) patients \& methods: Patients will randomly be divided into two equal groups: Group A: Patient will be subjected to bipolar endoscopic enucleation of the prostate by vaporization electrode (vapoenucleation).
Group B: Patient will be subjected to endoscopic enucleation of the prostate by bipolar hot kife electrode (needloscopic enucleation) Inclusion criteria: patients with Qmax of less than 15 mL/second due to BPH, severe LUTS/BPH requiring surgical treatment, and International Prostate Symptom Score (IPSS)\>7 due to BPH.
exclusion criteria: prostate and/or bladder cancer, bladder diverticula, urethral stricture, active urinary tract infection (UTI), unless treated, and men with neurogenic voiding dysfunction.
Operative Technique: Endoscopic enucleation of the prostate in saline utilizing either bipolar vaporization electrode or bipolar hot knife (collin's) electrode.
follow up: operative time, resected tissue weight, cath time, hospital stay and change of; IPSS,QOL, Qmax, PVR, PSA, IIEF-5 \& MSHQ-EjD besides; perioperative adverse events are recorded \& followed-up.
