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Nasopharyngeal carcinoma, light micrograph
Light micrograph of a section of human tissue showing nasopharyngeal carcinoma (NPC). It is a cancer that occurs in the nasopharynx, which is located behind the nose and above the back of the throat. This form of cancer is rare in the United States, but occurs more frequently in other parts of the world, especially south east Asia., Photo by NIGEL DOWNER/SCIENCE PHOTO LIBRARY
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