{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T20:42:25Z","timestamp":1786653745904,"version":"build-2736575974"},"reference-count":11,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2015]]},"abstract":"<jats:sec>\n                    <jats:title\/>\n                    <jats:p>Villous adenoma is a rare primary tumor of the urinary system, especially the bladder and kidneys. This study presents two cases of right pelvis villous adenoma, including that of a 61-year-old patient who had experienced hematuria for more than 1 year and was diagnosed with bladder and ureteral stones via B-ultrasound examination, and the other one involving a 65-year-old patient who was hospitalized for 6 days due to a right upper quadrant mass and diagnosed with right renal pelvis stones and hydrops via B-ultrasound examination. Both patients underwent nephrectomy, and their histological analysis demonstrated papillary projections covered by columnar cells and goblet cells. The first patient had a large amount of renal pelvis mucus accumulation with obvious microscopic intestinal metaplasia and mild-moderate nuclear atypia. Immunohistochemical studies revealed positive carcinoembryonic antigen and the caudal type homeobox 2 staining with varying degrees of cytokeratin (CK)-7 and CK20 expression in both patients. Recurrences or metastasis was not observed during the follow-up period of 3-4 years.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/0973-1482.144653","type":"journal-article","created":{"date-parts":[[2015,10,9]],"date-time":"2015-10-09T11:54:49Z","timestamp":1444391689000},"page":"663","source":"Crossref","is-referenced-by-count":7,"title":["Clinicopathological analysis of two cases with pelvis villous adenoma and review of relevant 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