{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T00:10:07Z","timestamp":1746576607842,"version":"3.40.5"},"reference-count":16,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,4,9]],"date-time":"2025-04-09T00:00:00Z","timestamp":1744156800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["IJU Case Reports"],"published-print":{"date-parts":[[2025,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Waldenstr\u00f6m macroglobulinemia is a low\u2010grade B\u2010cell lymphoma characterized by lymphoplasmacytic lymphoma infiltration of the bone marrow and immunoglobulin M (IgM) protein.<\/jats:p><\/jats:sec><jats:sec><jats:title>Case Presentation<\/jats:title><jats:p>An 80s\u2010year\u2010old male presented to our hospital with chief complaints of weight loss and general fatigue. Computed tomography (CT) showed homogeneous tumor around the kidney with elevated soluble Interleukin\u20102 receptor, serum IgM, and \u03b22\u2010microglobulin levels. Histopathological analysis by ultrasonography\u2010guided biopsy revealed dense lymphocytic proliferation, plasmacytoid differentiation, and Dutcher bodies, positive for CD20, CD138, and IgM, but negative for CD3 and CD5, consistent with lymphoplasmacytic lymphoma. Bone marrow biopsy revealed infiltration of the lymphoplasmacytic lymphoma. The patient received four courses of bortezomib, cyclophosphamide, and dexamethasone along with dexamethasone, rituximab, and cyclophosphamide therapy. Twelve months after treatment, CT revealed only slightly enlarged abdominal para\u2010aortic lymph nodes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Malignant lymphoma in perinephric lesions is a relatively rare condition; however, a definitive diagnosis can be obtained by ultrasound\u2010guided biopsy, allowing early initiation.<\/jats:p><\/jats:sec>","DOI":"10.1002\/iju5.70022","type":"journal-article","created":{"date-parts":[[2025,4,10]],"date-time":"2025-04-10T00:15:16Z","timestamp":1744244116000},"page":"271-275","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Waldenstr\u00f6m Macroglobulinemia Diagnosed by Ultrasonography\u2010Guided Biopsy of the Right Perinephric Tumor"],"prefix":"10.1002","volume":"8","author":[{"given":"Shingo","family":"Morinaga","sequence":"first","affiliation":[{"name":"Department of Urology Japan Community Health Care Organization Kani Tono Hospital  Kani Gifu Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shigeyuki","family":"Aoki","sequence":"additional","affiliation":[{"name":"Department of Urology Japan Community Health Care Organization Kani Tono Hospital  Kani Gifu Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Motoi","family":"Tobiume","sequence":"additional","affiliation":[{"name":"Department of Urology Japan Organization of Occupational Health and Safety Asahi Rosai Hospital  Owariasahi Aichi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Genya","family":"Nishikawa","sequence":"additional","affiliation":[{"name":"Department of Urology Japan Organization of Occupational Health and Safety Asahi Rosai Hospital  Owariasahi Aichi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fusako","family":"Higuchi","sequence":"additional","affiliation":[{"name":"Department of Clinical Laboratory Japan Community Health Care Organization Kani Tono 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