{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T21:46:44Z","timestamp":1778881604047,"version":"3.51.4"},"reference-count":7,"publisher":"BMJ","issue":"9","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2021,9,13]]},"published-print":{"date-parts":[[2021,9]]},"abstract":"<jats:p>Renal cell cancer (RCC) is incidentally detected on imaging in 50%\u201360% of cases. Among the RCCs, clear cell variant is most common and classically seen as heterogenous enhancing lesion on CT imaging. Hypoenhancing mass presents a diagnostic dilemma with differential diagnosis being urothelial carcinoma, fat poor angiomyolipoma, oncocytoma or rarer variants of RCC. Such cases require further evaluation in form of urine cytology or newer molecular diagnostic techniques. Here, we present a case of renal mass with minimal enhancement on CT scan and imaging features suggestive of upper tract urothelial cancer. Final histopathology revealed the mass to be chromophobe variant of renal cell carcinoma.<\/jats:p>","DOI":"10.1136\/bcr-2021-245037","type":"journal-article","created":{"date-parts":[[2021,9,22]],"date-time":"2021-09-22T12:40:30Z","timestamp":1632314430000},"page":"e245037","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Unusual endophytic non-enhancing tumour in the renal pelvis: a diagnostic dilemma"],"prefix":"10.1136","volume":"14","author":[{"given":"Murali","family":"Krishna","sequence":"first","affiliation":[{"name":"Urology, PGIMER, Chandigarh, Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Santosh","family":"Kumar","sequence":"additional","affiliation":[{"name":"Histopathology, PGIMER, Chandigarh, Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3891-4089","authenticated-orcid":false,"given":"Kalpesh Mahesh","family":"Parmar","sequence":"additional","affiliation":[{"name":"Urology, PGIMER, Chandigarh, Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Venkatesh","family":"Dhana Sekaran","sequence":"additional","affiliation":[{"name":"Histopathology, PGIMER, Chandigarh, Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,9,22]]},"reference":[{"key":"2025082713110199000_14.9.e245037.1","doi-asserted-by":"crossref","first-page":"429","DOI":"10.4103\/0971-3026.195773","article-title":"Solid renal masses in adults","volume":"26","author":"Mittal","year":"2016","journal-title":"Indian J Radiol Imaging"},{"key":"2025082713110199000_14.9.e245037.2","doi-asserted-by":"crossref","DOI":"10.3390\/diagnostics10060380","article-title":"Renal tumors in young adults: is preoperative computer tomography imaging suggestive for the nature of the tumors?","volume":"10","author":"Zaharie","year":"2020","journal-title":"Diagnostics"},{"key":"2025082713110199000_14.9.e245037.3","doi-asserted-by":"crossref","first-page":"508","DOI":"10.1016\/j.anndiagpath.2013.06.005","article-title":"Chromophobe renal cell carcinoma: a morphologic and immunohistochemical study of 45 cases","volume":"17","author":"Din","year":"2013","journal-title":"Ann Diagn Pathol"},{"key":"2025082713110199000_14.9.e245037.4","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.13.10813"},{"key":"2025082713110199000_14.9.e245037.5","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.11.7376"},{"key":"2025082713110199000_14.9.e245037.6","doi-asserted-by":"crossref","DOI":"10.1186\/s13104-017-2950-9","article-title":"Urine cell-free microRNA as biomarkers for transitional cell carcinoma","volume":"10","author":"Geva","year":"2017","journal-title":"BMC Res Notes"},{"key":"2025082713110199000_14.9.e245037.7","doi-asserted-by":"crossref","DOI":"10.3389\/fonc.2020.597486","article-title":"A urine-based liquid biopsy method for detection of upper tract urinary carcinoma","volume":"10","author":"Xu","year":"2020","journal-title":"Front Oncol"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2021-245037","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T20:11:10Z","timestamp":1756325470000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2021-245037"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,9]]},"references-count":7,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2021,9,22]]},"published-print":{"date-parts":[[2021,9]]}},"alternative-id":["10.1136\/bcr-2021-245037"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2021-245037","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,9]]}}}