{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148090216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Malignant/Sarcomatous Transformation of Mixed Epithelial and Stromal Tumor of the Kidney: A Case Report.","authors":"Kentaro Arinami, Kozue Ito, Go Hasegawa, Yurie Takizawa, Yohei Ikeda, Noboru Hara, Tsutomu Nishiyama","doi":"10.1002/iju5.70194","DOIUrl":"10.1002/iju5.70194","url":null,"abstract":"<p><strong>Introduction: </strong>Malignant transformation of mixed epithelial and stromal tumors of the kidney (MESTK) is extremely rare.</p><p><strong>Case presentation: </strong>A 39-year-old man with gross hematuria was suspected to have renal cell carcinoma, measuring 13 cm in diameter. No distant metastases were observed. The patient underwent laparoscopic left nephrectomy. Histopathological examination revealed malignant sarcomatous transformation of MESTK. Immunohistochemically, the tumor was positive for PAX8, CD10, and desmin, as well as for estrogen, progesterone, and androgen receptors. Comprehensive genomic profiling did not yield any treatment recommendations or relevant information. The patient will be closely monitored for any signs of recurrence or metastasis.</p><p><strong>Conclusion: </strong>The associated prognosis for patients with nonmetastatic MESTKs exhibiting malignant transformation is unknown; however, strict follow-up is recommended due to the histological grade of malignancy and local invasion.</p>","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 4","pages":"e70194"},"PeriodicalIF":0.5,"publicationDate":"2026-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13240297/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148200872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148090215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IJU Case ReportsPub Date : 2026-05-20eCollection Date: 2026-05-01DOI: 10.1002/iju5.70200
Takuto Tsuchiya, Go Kimura, Hayato Takeda, Jun Akatsuka, Hiroya Hasegawa, Yuka Toyama, Takashi Sakatani, Akira Shimizu, Ryuji Ohashi, Yukihiro Kondo
{"title":"Pathological Complete Response to Nivolumab Plus Ipilimumab Combination Therapy in Advanced Renal Cell Carcinoma With Inferior Vena Cava Tumor Thrombus.","authors":"Takuto Tsuchiya, Go Kimura, Hayato Takeda, Jun Akatsuka, Hiroya Hasegawa, Yuka Toyama, Takashi Sakatani, Akira Shimizu, Ryuji Ohashi, Yukihiro Kondo","doi":"10.1002/iju5.70200","DOIUrl":"10.1002/iju5.70200","url":null,"abstract":"<p><strong>Introduction: </strong>Nivolumab plus ipilimumab is a standard first-line regimen for advanced renal cell carcinoma; however, primary tumors often respond less favorably to this combination than to immune checkpoint inhibitor-tyrosine kinase inhibitor regimens, and pathological complete response is rare.</p><p><strong>Case presentation: </strong>A 78-year-old man presented with abdominal pain. Computed tomography revealed a 91-mm right renal mass with a Neves level 3 inferior vena cava tumor thrombus. Needle biopsy confirmed clear cell renal cell carcinoma with diffuse programmed death-ligand 1 expression, and both the tumor proportion and combined positive scores were approximately 100%. Nivolumab plus ipilimumab was administered. After 21 months, the primary tumor decreased in size by 68.1% and tumor thrombus regressed from level 3 to 1. Histopathological examination following radical nephrectomy with tumor thrombectomy demonstrated a pathological complete response.</p><p><strong>Conclusion: </strong>Diffuse programmed death-ligand 1 expression on pretreatment biopsy may have been associated with a favorable response to nivolumab plus ipilimumab.</p>","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 3","pages":"e70200"},"PeriodicalIF":0.5,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13239876/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148200877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IJU Case ReportsPub Date : 2026-05-15eCollection Date: 2026-05-01DOI: 10.1002/iju5.70195
Rikuo Suzuki, Taketo Kawai
{"title":"Concurrent Bladder Urothelial Carcinoma and Prostate Tuberculosis: A Case Report.","authors":"Rikuo Suzuki, Taketo Kawai","doi":"10.1002/iju5.70195","DOIUrl":"10.1002/iju5.70195","url":null,"abstract":"<p><strong>Introduction: </strong>Tuberculosis is associated with an increased risk of bladder cancer; however, the simultaneous occurrence of urogenital tuberculosis and bladder cancer is rare. Primary prostate tuberculosis is relatively uncommon in patients with urogenital tuberculosis.</p><p><strong>Case presentation: </strong>A 68-year-old man presented with gross hematuria and irritative voiding symptoms. Cystoscopy revealed a bladder tumor. The PSA level was elevated (8.32 ng/mL), and MRI findings suggested prostate cancer. Chest radiography and CT indicated pulmonary tuberculosis, which was confirmed by sputum mycobacterial culture and PCR. Urine mycobacterial cultures revealed urinary tuberculosis. TURBT and prostate biopsy were performed after initiating treatment for tuberculosis and confirming sputum conversion. Histopathological examination revealed urothelial carcinoma of the bladder and prostate tuberculosis.</p><p><strong>Conclusion: </strong>This is the first reported case of concurrent bladder urothelial carcinoma and prostate tuberculosis. Patients with pulmonary tuberculosis may benefit from evaluation for urogenital tuberculosis, including prostatic involvement, and consideration of coexisting urothelial carcinoma.</p>","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 ","pages":"e70195"},"PeriodicalIF":0.5,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13179123/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147965355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Rapid Systemic Progression After Ureteroscopic Holmium:YAG Laser Ablation for High-Grade Upper Tract Urothelial Carcinoma in a Solitary Kidney: A Case Report.","authors":"Shinichi Takebe, Nanaho Demizu, Mei Tokumoto, Ryota Morinaga, Taku Mitome, Akitoshi Takizawa","doi":"10.1002/iju5.70193","DOIUrl":"10.1002/iju5.70193","url":null,"abstract":"<p><strong>Introduction: </strong>Endoscopic kidney-sparing management is increasingly being used for upper tract urothelial carcinoma; however, its use in high-grade diseases remains challenging.</p><p><strong>Case presentation: </strong>An 82-year-old man with a solitary left kidney underwent transurethral lithotripsy for left renal and ureteral stones 25 years after right nephroureterectomy for ureteral carcinoma. A 15-mm papillary tumor was incidentally detected in the upper calyx and partially ablated using a holmium:YAG laser after biopsy. Biopsy revealed a high-grade urothelial carcinoma. Because the patient had a solitary kidney, radical nephroureterectomy would have necessitated dialysis. Therefore, ureteroscopic laser ablation was performed after counseling. A second laser ablation was performed 2 months later. Twelve days later, imaging revealed an enlarged renal pelvic tumor with multiple metastases. Despite receiving gemcitabine plus carboplatin chemotherapy, the patient died.</p><p><strong>Conclusion: </strong>Ureteroscopic ablation for high-grade upper tract urothelial carcinoma may offer limited cancer control and can be followed by extremely rapid systemic progression.</p>","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 ","pages":"e70193"},"PeriodicalIF":0.5,"publicationDate":"2026-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13175678/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147965362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vibegron for Anticholinergic-Resistant Pediatric Neurogenic Lower Urinary Tract Dysfunction After Spinal Cord Amputation: A Case Report.","authors":"Kohei Mori, Izuru Shiba, Haruko Miyazawa, Noriaki Samejima, Koga Horiuchi, Hirokazu Ishikawa, Yutaka Shiono, Kazumasa Matsumoto","doi":"10.1002/iju5.70185","DOIUrl":"10.1002/iju5.70185","url":null,"abstract":"<p><strong>Introduction: </strong>Pediatric neurogenic lower urinary tract dysfunction (NLUTD) is commonly managed with anticholinergic agents and clean intermittent catheterization (CIC). However, treatment options are limited for patients who remain resistant to conventional therapy, particularly following spinal cord surgery.</p><p><strong>Case presentation: </strong>A 14-year-old boy with myelomeningocele underwent vertebral resection and spinal cord amputation. Despite CIC and solifenacin, he continued to experience daily urinary incontinence. 1 year postoperatively, his symptoms worsened and urinalysis became abnormal. Video-urodynamic study showed reduced bladder compliance and progression of bladder deformity. Vibegron 50 mg once daily was initiated. At 12 weeks, bladder capacity increased and compliance improved. Over 24 months, no urinary tract infections, incontinence episodes, or drug-related adverse events occurred.</p><p><strong>Conclusion: </strong>This case suggests that vibegron may be an effective, well-tolerated add-on therapy for pediatric patients with anticholinergic-resistant NLUTD after spinal cord surgery, improving bladder function and morphology while helping maintain quality of life.</p>","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 ","pages":"e70185"},"PeriodicalIF":0.5,"publicationDate":"2026-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13173764/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147965420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148076121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Pseudo-Progression Observed During Immune Checkpoint Inhibitor Therapy for Advanced Adrenocortical Carcinoma.","authors":"Moeto Shimoda, Shinji Ohtake, Tetsuya Aoki, Jurii Karibe, Yosuke Shibata, Masashi Imano, Masahiro Inoue, Kazuki Kobayashi","doi":"10.1002/iju5.70192","DOIUrl":"10.1002/iju5.70192","url":null,"abstract":"<p><strong>Introduction: </strong>Adrenocortical carcinoma (ACC) is a rare and aggressive malignancy. Recent studies suggest that immune checkpoint inhibitors exhibit antitumor activity in selected ACC patients.</p><p><strong>Case presentation: </strong>We report a case of a 49-year-old man with advanced ACC and pulmonary metastasis treated with EDP-M chemotherapy, followed by pembrolizumab based on high tumor mutational burden (TMB, 27.1/Mb). Despite suspected pseudo-progression, transient tumor shrinkage was observed. However, the patient died of liver failure 9 months after diagnosis.</p><p><strong>Conclusion: </strong>This case suggests a therapeutic role for ICIs in ACC. Moreover, it highlights the importance of TMB and immune RECIST criteria in evaluating treatment response.</p>","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 ","pages":"e70192"},"PeriodicalIF":0.5,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13171221/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147943760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":52909,"journal":{"name":"IJU Case Reports","volume":"9 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148076015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}