No abstract available
MeSH terms
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Adolescent
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Choristoma / complications
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Choristoma / pathology*
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Choristoma / surgery
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Gastric Mucosa*
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Gastrointestinal Hemorrhage / etiology
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Humans
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Male
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Rectal Diseases / etiology
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Rectal Neoplasms / complications
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Rectal Neoplasms / pathology*
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Rectal Neoplasms / surgery
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Ulcer / pathology