REFERENCES

1. Gontero P, Birtle A, Capoun O, et al. European association of urology guidelines on non-muscle-invasive bladder cancer (TaT1 and carcinoma in situ)-a summary of the 2024 guidelines update. Eur Urol. 2024;86:531-49.

2. Rink M, Robinson BD, Green DA, et al. Impact of histological variants on clinical outcomes of patients with upper urinary tract urothelial carcinoma. J Urol. 2012;188:398-404.

3. Bhaijee F. Squamous cell carcinoma of the renal pelvis. Ann Diagn Pathol. 2012;16:124-7.

4. Jain A, Mittal D, Jindal A, et al. Incidentally detected squamous cell carcinoma of renal pelvis in patients with staghorn calculi: case series with review of the literature. ISRN Oncol. 2011;2011:620574.

5. Kumar S, Tomar V, Yadav SS, et al. Primary squamous cell carcinoma of kidney associated with large calculus in non-functioning kidney: a case report. Urol Case Rep. 2016;8:4-6.

6. Perez-Montiel D, Wakely PE, Hes O, Michal M, Suster S. High-grade urothelial carcinoma of the renal pelvis: clinicopathologic study of 108 cases with emphasis on unusual morphologic variants. Mod Pathol. 2006;19:494-503.

7. Hassan M, Qureshi A. Incidental squamous cell carcinoma of the renal pelvis in a non functioning kidney that was missed on two non-contrast CT-scans. J Ayub Med Coll Abbottabad. 2017;29:489-92.

8. Rouprêt M, Babjuk M, Burger M, et al. European association of urology guidelines on upper urinary tract urothelial carcinoma: 2020 update. Eur Urol. 2021;79:62-79.

9. Moher D, Shamseer L, Clarke M, et al. ; PRISMA-P Group. Preferred reporting items for systematic review and meta-analysis protocols (PRISMA-P) 2015 statement. Syst Rev. 2015;4:1.

10. Cooke A, Smith D, Booth A. Beyond PICO: the SPIDER tool for qualitative evidence synthesis. Qual Health Res. 2012;22:1435-43.

11. Howick J, Chalmers I, Glasziou P, et al. Explanation of the 2011 Oxford Centre for Evidence-Based Medicine (OCEBM) Levels of Evidence (Table). Available from: https://www.cebm.ox.ac.uk/files/levels-of-evidence/cebm-levels-of-evidence-2-1.pdf. [Last accessed on 5 Dec 2025].

12. Murad MH, Sultan S, Haffar S, Bazerbachi F. Methodological quality and synthesis of case series and case reports. BMJ Evid Based Med. 2018;23:60-3.

13. Sözer IT. Squamous cell carcinoma and calculi in ureteral stump: 12 years post-nephrectomy. J Urol. 1968;99:264-5.

14. Leong CH, Lim TK, Wong KK, Ong GB. Carcinoma of the renal pelvis: an analysis of the diagnostic problems in 23 cases. Br J Surg. 1976;63:102-6.

15. Kinn AC. Squamous cell carcinoma of the renal pelvis. Scand J Urol Nephrol. 1980;14:77-80.

16. Howat AJ, Scott E, Mackie DB, Pinkerton JR. Adenosquamous carcinoma of the renal pelvis. Am J Clin Pathol. 1983;79:731-3.

17. Li MK, Cheung WL. Squamous cell carcinoma of the renal pelvis. J Urol. 1987;138:269-71.

18. Mhiri MN, Rebai T, Turki L, Smida ML. Association between squamous cell carcinoma of the renal pelvis and calculi. Br J Urol. 1989;64:201-2.

19. Narumi Y, Sato T, Hori S, et al. Squamous cell carcinoma of the uroepithelium: CT evaluation. Radiology. 1989;173:853-6.

20. Sheaff M, Fociani P, Badenoch D, Baithun S. Verrucous carcinoma of the renal pelvis: case presentation and review of the literature. Virchows Arch. 1996;428:375-9.

21. Kimura T, Kiyota H, Asano K, et al. Squamous cell carcinoma of the renal pelvis with inferior vena caval extension. Int J Urol. 2000;7. 316-9; discussion 320.

22. Kim TS, Seong DH, Ro JY. Small cell carcinoma of the ureter with squamous cell and transitional cell carcinomatous components associated with ureteral stone. J Korean Med Sci. 2001;16:796-800.

23. Sivaramakrishna B, Aron M, Ansari MS, et al. Squamous cell carcinoma of the renal pelvis manifesting after percutaneous nephrolithotomy for long standing calculus. Int Urol Nephrol. 2004;36:149-51.

24. Ham BK, Kim JW, Yoon JH, et al. Squamous cell carcinoma must be considered in patients with long standing upper ureteral stone and pyonephrosis. Urol Res. 2012;40:425-8.

25. Verma N, Yadav G, Dhawan N, Kumar A. Squamous cell carcinoma of kidney co-existing with renal calculi: a rare tumour. BMJ Case Rep. 2011;2011.

26. Paonessa J, Beck H, Cook S. Squamous cell carcinoma of the renal pelvis associated with kidney stones: a case report. Med Oncol. 2011;28 Suppl 1:S392-4.

27. Di Battista L, Stio F, Guarino S, et al. Squamous cell carcinoma of the renal pelvis with stones and inferior vena cava infiltration. Case report. G Chir. 2012;33:182-185.

28. Kalayci OT, Bozdag Z, Sonmezgoz F, Sahin N. Squamous cell carcinoma of the renal pelvis associated with kidney stones: radiologic imaging features with gross and histopathological correlation. J Clin Imaging Sci. 2013;3:14.

29. Jongyotha K, Sriphrapradang C. Squamous cell carcinoma of the renal pelvis as a result of long-standing staghorn calculi. Case Rep Oncol. 2015;8:399-404.

30. Xiao J, Lei J, He L, Yin G. Renal calculus complicated with squamous cell carcinoma of renal pelvis: report of two cases. Can Urol Assoc J. 2015;9:E310-2.

31. Nachiappan M, Litake MM, Paravatraj VG, Sharma N, Narasimhan A. Squamous cell carcinoma of the renal pelvis, a rare site for a commonly known malignancy. J Clin Diagn Res. 2016;10:PD04-6.

32. Jakes A, Jani P, Menon M, et al. Renal Squamous cell carcinoma of a native kidney after renal transplant: a case report. Transplant Proc. 2016;48:259-61.

33. Deng S, Zhang B, Huang Y, Li J, Sang S, Zhang W. Case report of primary renal pelvis squamous cell carcinoma coexisting with long-standing calculi in left kidney on 18F-FDG PET/CT. Medicine (Baltimore). 2017;96:e6341.

34. Kartal I, Uysal S, Adabag A, Gok A, Sagnak AL, Ersoy H. Aggressive squamous cell carcinoma of the renal pelvis. Niger J Clin Pract. 2019;22:588-90.

35. Sun X, Li Y. Incidental squamous cell carcinoma of renal pelvis presenting as skin invasion: a case report. J Med Case Reports. 2020;14:244.

36. Hosseinzadeh M, Mohammadzadeh S. Primary pure squamous cell carcinoma of kidney associated with multiple stag horn stones. Int Med Case Rep J. 2020;13:261-3.

37. Chaurasia Z, Agarwal S, Gupta R, Khatana PS. Pelvicalyceal squamous cell carcinoma: incidental diagnosis with liver metastasis on follow up. Cureus. 2021;13:e18345.

38. Terakawa K, Sawa N, Mizuno H, et al. Renal squamous cell carcinoma-related polymyositis in a patient with autosomal dominant polycystic kidney disease. Intern Med. 2021;60:1237-42.

39. Oh CK, Kim JY. Primary squamous cell carcinoma of the kidney parenchyma with ascending colon invasion: a case report and literature review. Int J Surg Case Rep. 2022;91:106762.

40. Liu XH, Zou QM, Cao JD, Wang ZC. Primary squamous cell carcinoma with sarcomatoid differentiation of the kidney associated with ureteral stone obstruction: A case report. World J Clin Cases. 2022;10:11942-8.

41. Patel AM, Patel J, Jansari T, Thorat R. Incidentally detected primary squamous cell carcinoma of the kidney: case series with review of the literature. J Cancer Res Ther. 2023;19 Suppl:S928-31.

42. Priyatharsan K, Balagobi B, Heerthikan K, Thulasi T, Priyanka A, Sureska G. A rare case of renal squamous cell carcinoma presenting with psoas sign. Int J Surg Case Rep. 2023;110:108732.

43. Alnefaie ZA, Alsolumany AE, Aljahdali FH, Sulaiman OA, Aljehani SF. Reno-duodenal fistula as a complication of staghorn stones and renal pelvis tumor: a case presentation. Cureus. 2024;16:e60739.

44. Qiao J, Tian C, An L, Hong Y, Huang X, Liu J. Application of warning biopsies in percutaneous nephrolithotomy. Transl Androl Urol. 2024;13:1455-62.

45. Holmäng S, Lele SM, Johansson SL. Squamous cell carcinoma of the renal pelvis and ureter: incidence, symptoms, treatment and outcome. J Urol. 2007;178:51-6.

46. Chow WH, Lindblad P, Gridley G, et al. Risk of urinary tract cancers following kidney or ureter stones. J Natl Cancer Inst. 1997;89:1453-7.

47. Tyagi N, Sharma S, Tyagi SP, et al. A histomorphologic and ultrastructural study of the malignant tumours of the renal pelvis. J Postgrad Med. 1993;39:197-201.

48. Chung SD, Liu SP, Lin HC. A population-based study on the association between urinary calculi and kidney cancer. Can Urol Assoc J. 2013;7:E716-21.

49. Federico A, Morgillo F, Tuccillo C, Ciardiello F, Loguercio C. Chronic inflammation and oxidative stress in human carcinogenesis. Int J Cancer. 2007;121:2381-6.

50. Chen YW, Shen SH, Chang YH, Pan CC. Squamous cell carcinoma arising from a renal calyceal diverticulum. Urology. 2016;95:e5-6.

51. Mizusawa H, Komiyama I, Ueno Y, Maejima T, Kato H. Squamous cell carcinoma in the renal pelvis of a horseshoe kidney. Int J Urol. 2004;11:782-4.

52. Gahagan HQ, Reed WK. Squamous cell carcinoma of the renal pelvis; three case reports and review of the literature. J Urol. 1949;62:139-51.

53. Busby JE, Brown GA, Tamboli P, et al. Upper urinary tract tumors with nontransitional histology: a single-center experience. Urology. 2006;67:518-23.

54. An L, Xiong L, Xu Q, Chen L, Ma K, Huang X. Incidental diagnosis of renal pelvic tumor in patients who underwent percutaneous nephrolithotomy: a report of 6 cases and review of the literature. Urology. 2023;171:64-70.

55. Berz D, Rizack T, Weitzen S, Mega A, Renzulli J, Colvin G. Survival of patients with squamous cell malignancies of the upper urinary tract. Clin Med Insights Oncol. 2012;6:11-8.