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Histologically, the tumor exhibited a biphasic growth pattern, which comprised haphazardly arranged, interwoven fascicles of plump, myoid-appearing spindle cells with elongated nuclei and abundant eosinophilic cytoplasm, and more cellular areas of primitive-appearing polygonal cells that were arranged in a hemangiopericytomatous pattern. The tumor cells were positive for smooth muscle actin (SMA), and negative for desmin, h-caldesmon, CD34, cytokeratin, S100 protein, and CD117. The Ki-67 labeling index was not high (up to 7%). Based on these histologic and immunohistochemical features, our patient was diagnosed with a myofibroma of the sigmoid colon. The presence of solitary myofibroma in the intestine of an adult requires attention to avoid misdiagnosis as a more aggressive mesenchymal tumor.<\/jats:p>\n          <jats:p>\n            <jats:bold>Virtual Slides<\/jats:bold>\n          <\/jats:p>\n          <jats:p>The virtual silde(s) for this article can be found here: <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"http:\/\/www.diagnosticpathology.diagnomx.eu\/vs\/2096403796957687\" ext-link-type=\"uri\">http:\/\/www.diagnosticpathology.diagnomx.eu\/vs\/2096403796957687<\/jats:ext-link>\n          <\/jats:p>","DOI":"10.1186\/1746-1596-8-90","type":"journal-article","created":{"date-parts":[[2013,6,6]],"date-time":"2013-06-06T10:14:54Z","timestamp":1370513694000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Solitary myofibroma of the sigmoid colon: case report and review of the literature"],"prefix":"10.1186","volume":"8","author":[{"given":"Mi-Jung","family":"Kim","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suk Hee","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eui Gon","family":"Youk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sojin","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joon Hyuk","family":"Choi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kyung-Ja","family":"Cho","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2013,6,6]]},"reference":[{"key":"782_CR1","doi-asserted-by":"publisher","first-page":"1807","DOI":"10.1002\/1097-0142(19811015)48:8<1807::AID-CNCR2820480818>3.0.CO;2-G","volume":"48","author":"EB Chung","year":"1981","unstructured":"Chung EB, Enzinger FM: Infantile myofibromatosis. 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