No abstract available
MeSH terms
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Adolescent
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Anal Canal / pathology
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Diagnosis, Differential
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Gastrointestinal Hemorrhage / diagnosis*
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Gastrointestinal Hemorrhage / pathology
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Humans
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Intestinal Polyps / diagnosis*
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Intestinal Polyps / pathology
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Male
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Rectal Diseases / diagnosis*
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Rectal Diseases / pathology
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Rectal Neoplasms / diagnosis*