Transurethral microwave thermotherapy (TUMT) is a procedure that treats urinary symptoms in men caused by an enlarged prostate. During the procedure, a surgeon inserts a microwave antenna into the tip of the penis until it reaches the enlarged tissue. The energy emitted from the microwave antenna heats and kills the excess tissue. The removal of the excess prostate tissue reduces the blockage and relieves symptoms. TUMT usually takes place in the doctor’s office or outpatient setting and does not require an overnight stay.