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KMID : 1103720110650030275
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Journal of the Korean Society of Radiology
2011 Volume.65 No. 3 p.275 ~ p.284
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Unusual Primary Subepithelial Tumors of the Colon: Multimodality Imaging Findings with Endoscopic and Pathologic Correlation
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Oh Jong-Young
Kwon Hee-Jin
Cho Jin-Han
Ha Dong-Ho
Nam Kyeong-Jin
Kang Eun-Ju
Lee Jong-Hoon
Kim Suk
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Abstract
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The colonoscopy has been used to diagnose various colonic lesions. However, this method has its limitations in diagnosing and differentiating subepithelial tumors. For this reason, the role of cross-sectional radiologic imaging is important for the diagnosis of colonic subepithelial tumors. Moreover, although these tumors are associated with a wide range of radiologic features, they may have unique radiologic features that suggest a specific diagnosis. Hemangiomas typically show transmural colonic wall thickening with phleboliths in intramural or extracolic areas. Colonic lymphangiomas manifest as a multilocular cystic mass at CT and sonography. Colonic lipomas are well demonstrated by CT because the masses were present with characteristic fatty density. Schwannomas usually appear as well circumscribed, homogeneous masses with low attenuation at CT. The primary form of colonic lymphoma has a wide variety of radiologic types, including a polypoid mass, circumferential mural mass, and a cavitary mass. Small gastrointestinal stromal tumors are usually homogeneous, whereas larger tumors tend to have a heterogeneous appearance with central necrosis at contrast-enhanced CT scans. Neuroendocrine tumors of the colon are most frequently observed in the rectum and are typically small incidental lesions. Familiarity with these imaging features can help distinguish particular disease entities.
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KEYWORD
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Colon, Diseases , Colon, Subepithelial Tumors , Colon, CT
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