{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T07:21:51Z","timestamp":1787728911698,"version":"build-2784847793"},"reference-count":19,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T00:00:00Z","timestamp":1787616000000},"content-version":"vor","delay-in-days":236,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Radiology"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>Granulomatosis with polyangiitis (GPA) is an ANCA\u2010associated small\u2010vessel vasculitis that can rarely present as a mass\u2010like inflammatory pseudotumor in the abdomen. We report a 52\u2010year\u2010old woman with systemic symptoms and laboratory evidence of GPA with multiple heterogeneous mass lesions involving the pancreas and both kidneys on CT imaging. These lesions mimicked a neoplasm, prompting further characterization with tissue sampling. Histopathology of the pancreatic lesion confirmed granulomatous inflammatory changes. The patient was treated with glucocorticoids and rituximab, resulting in marked progressive resolution of lesions on follow\u2010up imaging. This case highlights the importance of recognizing atypical mass\u2010like abdominal manifestations of GPA, the pivotal role of cross\u2010sectional imaging in diagnosis and follow\u2010up, and the need to consider inflammatory pseudotumor in the differential diagnosis to avoid unnecessary surgery.<\/jats:p>","DOI":"10.1155\/crra\/6883674","type":"journal-article","created":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T06:51:47Z","timestamp":1787727107000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Granulomatosis With Polyangiitis With Multifocal Pancreatic and Renal Pseudotumors, Mimicking Neoplasm: A Case Report"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-6162-9431","authenticated-orcid":false,"given":"Surbhi","family":"Singh","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9541-1117","authenticated-orcid":false,"given":"Akhil","family":"Tanwar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6556-0234","authenticated-orcid":false,"given":"Dhrumil","family":"Patel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonathan","family":"Von Reusner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Prabath Kumar","family":"Mondel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7204-3312","authenticated-orcid":false,"given":"Ashlesha","family":"Udare","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,25]]},"reference":[{"key":"e_1_2_8_1_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.autrev.2021.103018"},{"key":"e_1_2_8_2_2","doi-asserted-by":"publisher","DOI":"10.1136\/annrheumdis-2021-221794"},{"key":"e_1_2_8_3_2","doi-asserted-by":"publisher","DOI":"10.1136\/ard-2022-223764"},{"key":"e_1_2_8_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.autrev.2014.08.017"},{"key":"e_1_2_8_5_2","doi-asserted-by":"publisher","DOI":"10.1148\/rg.2021210132"},{"key":"e_1_2_8_6_2","doi-asserted-by":"publisher","DOI":"10.1148\/rg.2021200172"},{"key":"e_1_2_8_7_2","doi-asserted-by":"publisher","DOI":"10.1186\/s12882-023-03276-1"},{"key":"e_1_2_8_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.radcr.2021.01.014"},{"key":"e_1_2_8_9_2","doi-asserted-by":"publisher","DOI":"10.1136\/bcr-2020-241033"},{"key":"e_1_2_8_10_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01536809"},{"key":"e_1_2_8_11_2","doi-asserted-by":"publisher","DOI":"10.1159\/000055821"},{"key":"e_1_2_8_12_2","first-page":"258","article-title":"Exocrine Pancreatic Involvement in Wegener\u2032s granulomatosis. 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