Kevin has been experiencing difficulty urinating now that he is over the age of 60. The doctor examines his prostate gland and finds no evidence of inflammation. Furthermore, Kevin's PSA test is normal. It is most likely that Kevin is suffering from

It is most likely that Kevin is suffering from benign prostatic hypertrophy.

Explanation:

Benign prostatic hyperplasia (BPH) : it's also known as prostate enlargement and it's noncancerous. It's a noncancerous increase in size of the prostate gland.

It can be caused by:

Urinary tract infection, inflammation of the prostate (prostatitis), Narrowing of the urethra (urethral stricture), Bladder or kidney stones e. t. c.