Endoscopic surgery uses scopes going through small incisions or natural body openings in order to diagnose and treat disease. Another popular term is minimally invasive surgery (MIS), which emphasizes that diagnosis and treatments that can be done with reduced body cavity invasion. An example of endoscopic surgery is Photoselective vaporization (PVP) and is also called the “green light laser” procedure. This procedure is used for the treatment of Benign Prostatic Hyperplasia (BPH), an enlargement of the prostate gland resulting in the urethral restriction. In this procedure a telescope is placed in the urethra and is vaporized using a high power laser. This can be done as an out-patient procedure and often without the need for a post-operative urinary catheter.