A fatigued man with interrupted sleep and frequent need for urination

Case scenario

Ben is a 56-year-old man who presents with fatigue. He has been experiencing interrupted sleep and needs to get up several times at night to urinate. He thinks he noticed some blood in his urine on one occasion. During the day he also needs to go to the toilet frequently to pass water, especially before meetings and leaving the office for home. He is currently taking ramipril 2.5 mg daily to control his mild hypertension. Ben’s mother has mature-onset diabetes and his father died last year at the age of 82 years from postsurgical complications after a transurethral resection.

What is your diagnosis for Ben?