HEALTH TOPICS 
Getting a closer look at prostate cancer
Molecular imaging may help determine the location and extent of disease — and point to the best treatment
Consider this scenario: A man diagnosed with prostate cancer undergoes a radical prostatectomy. His prostate-specific antigen level, or PSA, drops from 12 ng/ml to nearly zero. But several months later, his PSA begins rising yet again, indicating that his cancer might be making a comeback.
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