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  • Title: Primary mesenteric neuroendocrine tumor that changed its internal composition from cystic to solid: a case report.
    Author: Yasuda A, Kitagami H, Kondo Y, Nonoyama K, Watanabe K, Fujihata S, Miyai H, Yamamoto M, Shimizu Y, Tanaka M.
    Journal: Clin J Gastroenterol; 2017 Feb; 10(1):18-22. PubMed ID: 28028783.
    Abstract:
    Mesenteric neuroendocrine tumors are usually metastases originating from the small intestine; however, primary mesenteric cases are rare. We present an interesting case of a mesenteric neuroendocrine tumor that changed its internal composition from cystic to solid. A 72-year-old male visited our hospital because of epigastralgia 4 years earlier. A 25-mm tumor was recognized around the terminal duodenum on computed tomography and magnetic resonance imaging, and was diagnosed as a cystic lesion. Over the following 2 years, the tumor grew to 40 mm and its internal composition changed from cystic to solid. The lesion showed positive findings on fluorodeoxyglucose positron emission tomography. Upon laparotomy, a solid tumor was detected in the mesentery of the jejunum near the ligament of Treitz. The tumor was extracted without intestinal resection and was diagnosed as a low-grade neuroendocrine tumor after histopathological and immunohistochemical examination. One year has passed since the operation, and there has been no recurrence.
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