Final answer:
The likely diagnosis for a 65-year-old male with an elastic, moderately enlarged prostate on rectal exam is benign prostatic hyperplasia (BPH), which is the abnormal growth of the prostate causing urinary symptoms.
Step-by-step explanation:
The most likely diagnosis for a 65-year-old male presenting with urinary frequency and having an elastic, moderately enlarged prostate on digital rectal exam is benign prostatic hyperplasia (BPH). This condition is characterized by the abnormal growth of the prostate gland, which can constrict the urethra and cause symptoms like frequent urination and a weak urinary stream. As men age, the prevalence of BPH increases, with up to 40 percent of men affected by age 60, and as many as 80 percent by age 80. While there is no direct link between BPH and prostate cancer, their symptoms can be similar, making differential diagnosis important. Prostate cancer would be considered if a mass were found on the prostate during the digital rectal exam, and confirmation would require a biopsy. Treatments for BPH aim to relieve pressure on the urethra to allow more normal urine flow and range from medication for mild to moderate symptoms to surgery for more severe cases.