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Technology over the past 30 years has developed a remarkable set of instruments that can look almost anywhere.
http://www.healthatoz.com
The combination of two imaging techniques -- positron emission tomography and computed tomography -- provides quicker and more precise information to guide the treatment.
http://www.washingtonpost.com
Five tips for a timely diagnosis.
http://coloncancer.about.com/od/screening/a/Diagnosis.htm