A 63-year-old man complains of a 6-month history of difficulty voiding and feeling as though he cannot empty his bladder completely. After voiding, he often feels as though he needs to urinate again. He denies a urethral discharge. He has mild hypertension and takes hydrochlorothiazide. His only other medication is ampicillin prescribed for two urinary tract infections during the past year.

On examination, his blood pressure is 130/84 mm Hg and his pulse rate 80 beats/min; he is afebrile. Findings from examinations of the heart and lungs are normal, and the abdomen reveals no masses. What is the most likely diagnosis and what should be the initial therapy? *This case is from the Docplexus Editorial Team for educative purposes only. Source: Case Files Surgery The correct answer will be posted soon!