{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T22:37:19Z","timestamp":1777502239125,"version":"3.51.4"},"reference-count":31,"publisher":"SAGE Publications","issue":"10","license":[{"start":{"date-parts":[[2014,12,1]],"date-time":"2014-12-01T00:00:00Z","timestamp":1417392000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Acta Radiol"],"published-print":{"date-parts":[[2014,12]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Parotid tumor is an uncommon neoplasm. Only a few studies describing the sonographic features of pleomorphic adenomas and Warthin\u2019s tumors have been published, and most of those reports are based on a relatively small number of cases.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To define the sonographic characteristics of pleomorphic adenoma and Warthin\u2019s tumor in the parotid gland.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Material and Methods<\/jats:title>\n                    <jats:p>We retrospectively evaluated the sonographic features of 77 pleomorphic adenomas in 70 patients and 93 Warthin\u2019s tumors in 61 patients. The features included tumor size, shape, border, echogenicity, and homogeneity, the presence of a cystic area, acoustic enhancement, and the grade and distribution of vascularization.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Lobulated lesions were observed in 49 pleomorphic adenomas and 36 Warthin\u2019s tumors. The lobulated shape was observed more frequently in pleomorphic adenomas than in Warthin\u2019s tumors ( P\u2009=\u20090.005). Cystic areas within lesions were detected in 16 (16\/77, 20.8%) pleomorphic adenomas and 42 (42\/93, 45.2%) Warthin\u2019s tumors ( P\u2009=\u20090.001). Of the pleomorphic adenomas, 77.9% had grade 0 or grade 1 vascularity, while 73.1% of Warthin\u2019s tumors had grade 2 or grade 3 vascularity ( P\u2009=\u20090.000). Flow was peripheral in 53.2% of pleomorphic adenomas. The frequencies of central perfusion and mixed perfusion in Warthin\u2019s tumors were equal (47.3% vs. 47.3%, respectively). The differences in the vessel distribution between these two diseases was significant ( P\u2009=\u20090.000).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Ultrasound imaging characteristics, including multiple occurrences, shape, intrinsic cystic change, and the grade and distribution of tumor vessels, can be used to differentiate pleomorphic adenomas from Warthin\u2019s tumors.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0284185113515865","type":"journal-article","created":{"date-parts":[[2013,12,9]],"date-time":"2013-12-09T21:29:42Z","timestamp":1386624582000},"page":"1203-1209","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":33,"title":["Differentiation of pleomorphic adenoma and Warthin\u2019s tumor of the parotid gland: ultrasonographic features"],"prefix":"10.1177","volume":"55","author":[{"given":"Xueyu","family":"Rong","sequence":"first","affiliation":[{"name":"Department of Diagnostic Ultrasound, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qiang","family":"Zhu","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Ultrasound, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongtao","family":"Ji","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Ultrasound, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiangping","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Ultrasound, Beijing Tongren Hospital, Capital Medical University, Beijing, PR 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