Transurethral microwave thermotherapy (TUMT) is an outpatient procedure to treat urinary symptoms caused by an enlarged prostate, a condition known as benign prostatic hyperplasia (BPH). TUMT is generally considered a safe procedure with a low risk of side effects. It’s generally used for men with other health conditions for whom more invasive surgery isn’t recommended. TUMT is one of several minimally invasive treatment options for BPH.