Treating benign prostatic hyperplasia (BPH) without surgery by injecting tiny beads into the artery to block blood supply to the prostate:
http://www.dailymail.co.uk/health/article-4291774/Thousands-men-benefit-new-prostate-therapy.html
http://news.unchealthcare.org/cardiology/news/news-archives/2013/unc-is-treating-prostate-enlargement-without-surgery

The PAE treatment is performed through an artery in the upper thigh, similar to cardiac catheterization, without requiring an incision.  Using x-ray, a catheter is guided to the artery that supplies blood to the prostate, and tiny beads are injected that temporarily block the blood flow.

By temporarily stemming blood flow to the prostate, it begins to shrink and soften, relieving symptoms.  Symptoms of BPH can include slow, interrupted, or weak urinary stream; urgency with leaking or dribbling; and frequent urination, especially at night.