Abstract
Collision tumors of the colon are rare. A 54-year-old man was referred to our hospital for the evaluation of hematochezia. Colonoscopy demonstrated the presence of about 3 cm sized mass in the rectosigmoid junction. After surgical resection, the colonic lesion was histologically composed of two discrete lesions: adenocarcinoma in the superficial layer and poorly differentiated neuroendocrine carcinoma in the deeper layer. We report this case of colonic collision tumor (adenocarcinoma and neuroendocrine carcinoma) with a review of the literature.
Publication types
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Case Reports
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English Abstract
MeSH terms
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Adenocarcinoma / diagnosis*
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Adenocarcinoma / pathology
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Antigens, CD / metabolism
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Antigens, Differentiation, T-Lymphocyte / metabolism
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Carcinoma, Neuroendocrine / diagnosis*
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Carcinoma, Neuroendocrine / pathology
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Colonic Neoplasms / diagnosis*
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Colonic Neoplasms / pathology
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Colonoscopy
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Humans
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Male
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Middle Aged
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Multimodal Imaging
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Positron-Emission Tomography
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Synaptophysin / metabolism
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Tomography, X-Ray Computed
Substances
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Antigens, CD
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Antigens, Differentiation, T-Lymphocyte
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CD6 antigen
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Synaptophysin