{"paper_id":"f65bb500-84e6-4836-90d8-472dc1e263e8","body_text":"ECR 2020 / C-14011\nTumors and tumor-like lesions associated with endometriosis\nCongress:\nECR 2020\nPoster Number:\nC-14011\nType:\nEducational Exhibit\nKeywords:\nNot applicable, Inflammation, Cancer, Diagnostic procedure, MR, Genital / Reproductive system female, Genitourinary\nAuthors:\nS. Kitai; Tokyo/JP\nDOI:\n10.26044/ecr2020/C-14011\nLearning objectives\nTo be familiar with the imaging findings of ovarian cancer and ovarian borderline tumors, which may arise in endometriotic cysts.\nTo be aware of benign tumor-like lesions, which might appear in endometriosis, mimicking malignancy.\nTo present rare tumors and tumor-like lesions associated with endometriosis\nBackground\nTumors and tumor-like lesions are known to arise in association with endometriosis.\nSolid portion associated with endometriotic cyst\nMalignant: clear cell carcinoma, endometrioid carcinoma\nBorderline: seromucinous borderline tumor (SMBT)\nBenign: polypoid endometriosis, decidual change during pregnancy\nFindings and procedure details\nGeneral imaging findings ofovarian carcinoma associated with endometriosis1, 2)\nEnlargement of endometriotic cyst\nT2WI: loss of shading (Fig. 1)\nEnhancing nodule: CE-subtraction image(Fig. 2, 3)\nUsually absence of massive ascites or peritoneal lesion\nMR imagingfeaturesof clear cell carcinoma of the ovary3, 4)\nUnilocular cystic masses with solid protrusions\nRarely multilocular or solid\nSolid protrusions: solitary or pleural\nMRimaging featuresofendometrioid cancerof the ovary5)\nSimilar to clear cell carcinoma (Fig. 4), however, predominantly multilocular appearance\nBilateral, 17%(Fig. 5)\nAssociation with endometrial cancer, 10-15%(Fig. 6)\nMRimaging featuresof SMBTof...\nConclusion\nTo be aware of tumors and tumor-like lesions associated with endometriosis, will fascilate the imaging diagnosis.\nPersonal information and conflict of interest\nS. Kitai; Tokyo/JP - Advisory Board at Chugai Pharmaceutical Co., LTD\nReferences\nTanaka YO. AJR Am J Roentgenol. 175:1423-30, 2000\nMcDermott S, et al: MR imaging of malignancies arising in endometriomas and extraovarian endometriosis.RadioGraphics. 32:845–863, 2012\nMatsuoka Y, et al: MR imaging of clear cell carcinoma of the ovary. Eur Radiol.11:946-51, 2001\nMatsuoka Y, et al: MR imaging of clear cell carcinoma of the ovary. Eur Radiol.11:946-51, 2001\nManabe T. J Comput Assist Tomogr. 31:229-35, 2007\nKataoka M.ComputAssist Tomogr.2002 Jul-Aug;26(4):532-7.\nKurata Y ,et al, Eur Radiol, 2016\nKurata Y ,et al, Magn Reson Med Sci, 2017\nShimamoto...","source_license":"CC0","license_restricted":false}