Research Publications & Abstract presentation
1. Sequential breast and ovarian metastases more than a decade after radical nephrectomy for renal cell carcinoma: a case report and literature review. YW Ooi, ZJ Lee, WLK Ong (2025), Poster Abstracts. BJU Int, 136: S4 S49. https://doi.org/10.1111/bju.70052
2. Non-surgical management of iatrogenic bladder injury complicated with vesicocutaneous fistula post laparotomy– a case report A. Syafiq, ZJ Lee, YW Ooi, WLK Ong (2025), Poster Abstracts. BJU Int, 136: S4 S49. https://doi.org/10.1111/bju.70052
3. A Wolf in Urachal Clothing: Sigmoid Cancer Unmasked. Zhu Jie LEE, Muhammad Nazri Wafi Bin MOHD NASIR, Yeon Wee OOI, William Lay Keat ONG. (2025), Poster Abstracts. BJU Int, 136: S4 S49. https://doi.org/10.1111/bju.70052
4. Ewing sarcoma finds an unusual home in the kidney– a rare diagnosis with aggressive behavior Narresh Purushothaman, Yeon Wee Ooi, Zhu Jie Lee, William Lay Keat Ong(2025), Poster Abstracts. BJU Int, 136: S4 S49. https://doi.org/10.1111/bju.70052
5. Structural degradation of ureteric stents: radiological patterns of isolated shaft fragmentation. Istiqamah Amanah1, Zhu Jie Lee2, Yeon Wee Ooi2, William Lay Keat Ong2 2025), Poster Abstracts. BJU Int, 136: S4 S49. https://doi.org/10.1111/bju.70052
6. Xanthogranulomatous prostatitis: the rare unexpected plot twist Izz Amirah M.S., Yeon Wee Ooi, Zhu Jie Lee, William Lay Keat Ong. 2025), Poster Abstracts. BJU Int, 136: S4 S49. https://doi.org/10.1111/bju.70052
7. Tee KTL, Lee ZJ, Narresh P, Ch’ng LS, Ong WLK. An uncommon challenge: ewing sarcoma of the kidney in a paediatric patient. (2024), MUC Abstracts. BJU Int, 134: 4-41. https://doi.org/10.1111/bju.16560
8. Ann CC, Somani B, Castellani D, Fong KY, Sarica S, Emiliani E, Ong WL, Ragoori D, Gökce MI, Gadzhiev N, Tanidir Y. Comparing Same Sitting Bilateral vs Unilateral RIRS in the Elderly. Urology. 2024 Feb 28.
9. Ong WL, Somani BK, Fong KY, Teoh JY, Sarica K, Chai CA, Ragoori D, Tailly T, Hamri SB, Heng CT, Biligere S. Retrograde intrarenal surgery for asymptomatic incidental renal stones: a retrospective, real‐world data analysis. BJU international. 2024 Feb 11.
10. Giulioni C, Mulawkar PM, Castellani D, De Stefano V, Nedbal C, Gadzhiev N, Pirola GM, Law YXT, Wroclawski ML, Keat WOL, et al. Near-Infrared Fluorescence Imaging with Indocyanine Green for Robot-Assisted Partial Nephrectomy: A Systematic Review and Meta-Analysis. Cancers. 2023; 15(23):5560. https://doi.org/10.3390/cancers15235560
11. Emiliani E, Sanz-Gómez I, Somani B, Tailly T, Castellani D, Traxer O, Teoh JY, Chew BH, Keat WO, Chai CA, Saeed BH. Does gender influence retrograde intrarenal surgery (RIRS) outcomes? Data from the Flexible Ureteroscopy Outcomes Registry (FLEXOR). Actas Urológicas Españolas (English Edition). 2023 Jun 25.
12. Chai CA, Teoh YC, Tailly T, Emiliani E, Inoue T, Tanidir Y, Gadzhiev N, Bin Hamri S, Ong WL, Shrestha A, Ragoori D, Lakmichi MA, Gorelov D, Soebhali B, Vaddi CM, Bhatia TP, Desai D, Durai P, Heng CT, Chew B, Castellani D, Somani B, Traxer O, Gauhar V; TOWER Group. Influence of pre-stenting on RIRS outcomes. Inferences from patients of the Global Multicentre Flexible Ureteroscopy Outcome Registry (FLEXOR). Minerva Urol Nephrol. 2023 Jun 9. doi: 10.23736/S2724-6051.23.05239-4. Epub ahead of print. PMID: 37293816.
13. Ong WL, Gauhar V, Castellani D, Teoh JY. Tips and pitfalls in using social media platforms for survey dissemination. Société Internationale d'Urologie Journal. 2023 Mar 16;4(2):118-24.
14. Singh A, Traxer O, Somani B, Ann CC, Lay Keat WO, Chew B, Ganpule A, Sabnis R, Desai M, Tailly T, Emiliani E. MP23-18 RETROSPECTIVE COMPARATIVE ANALYSIS OF REUSABLE AND DISPOSABLE FLEXIBLE URETEROSCOPES: RESULTS FROM FLEXIBLE URETEROSCOPY OUTCOME REGISTRY (FLEXOR). The Journal of Urology. 2023 Apr;209(Supplement 4):e314.
15. Abhishek S, Isabel S, Vineet G, Bhaskar S, Thomas T, Daniele C, Olivier T, Yuen-Chun TJ, Ben Hall C, William Ong LK, Chai AC. MP35-06 DOES GENDER HAVE ANY INFLUENCE ON RIRS OUTCOMES? DATA FROM THE FLEXIBLE URETEROSCOPY OUTCOMES REGISTRY (FLEXOR). The Journal of Urology. 2023 Apr;209(Supplement 4):e470.
16. Keat WO, Somani BK, Pietropaolo A, Chew BH, Chai CA, Inoue T, Ragoori D, Biligere S, Galosi AB, Pavia MP, Milanese G. Do Hounsfield Units have any significance in predicting intra-and postoperative outcomes in retrograde intrarenal surgery using Holmium and Thulium fiber laser? Results from the FLEXible ureteroscopy Outcomes Registry (FLEXOR). World Journal of Urology. 2023 Mar 16:1-8.
17. Castellani D, Fong KY, Lim EJ, Chew BH, Tailly T, Emiliani E, Yuen-Chun Teoh J, Chai CA, Tiong HC, Lay Keat WO, Tanidir Y. Comparison Between Holmium: YAG Laser with MOSES Technology versus Thulium Fiber Laser Lithotripsy in Retrograde Intrarenal Surgery for Kidney Stones in Adults: A Propensity Score-matched Analysis from the FLEXible Ureteroscopy Outcomes Registry (FLEXOR). The Journal of Urology. 2023 May 1:10-97.
18. Giulioni C, Castellani D, Somani BK, Chew BH, Tailly T, Keat WO, Teoh JY, Emiliani E, Chai CA, Galosi AB, Ragoori D. The efficacy of retrograde intra-renal surgery (RIRS) for lower pole stones: results from 2946 patients. World journal of urology. 2023 Mar 17:1-7.
19. Vineet Gauhar, Chu Ann Chai, Ben H Chew, William Ong Lay Keat, et al. RIRS with disposable or reusable scopes: does it make a difference? Results from the multicentre FLEXOR study. Therapeutic Advances in Urology (2023) https://doi.org/10.1177/17562872231158072
20. Gauhar, V., Chew, B.H., Traxer, O., Ong W.L.K. et al. Indications, preferences, global practice patterns and outcomes in retrograde intrarenal surgery (RIRS) for renal stones in adults: results from a multicenter database of 6669 patients of the global FLEXible ureteroscopy Outcomes Registry (FLEXOR). World J Urol (2022). https://doi.org/10.1007/s00345-022-04257-z
21. KYW Chang, SB Lee, WLK Ong et al. Retrospective review of cognitive MRI-TRUS fusion targeted biopsy of prostate: A single centre experience. (2022) Abstracts. BJU Int, 130: 4-46. https://doi.org/10.1111/bju.15908
22. YW Ooi, KYW Chang, WLK Ong, D Manoharan, SB Lee. Serous borderline tumour of testis- A rare entity (2022) Abstracts. BJU Int, 130: 4-46. https://doi.org/10.1111/bju.15908
23. RL Teo, WLK Ong et al. An audit of laparoscopic Tenchkoff catheter insertion in paediatric patients: A single centre experience. (2022) Abstracts. BJU Int, 130: 4-46. https://doi.org/10.1111/bju.15908
24. Ong, W. L. K., Lechmiannandan, S., Lim, Y. L., Manoharan, D., & Lee, S. B. (2022). Early outcomes of short-course low intensity shockwave therapy (LiSWT) for erectile dysfunction: A prospective, randomized, double-blinded, sham controlled study in Malaysia. Andrologia, e14518. https://doi.org/10.1111/and.14518
25. WLK Ong, CSY Eng, P Nagappan. Anuria in children under 2 years: Is ureteric stenting possible? 2021 BJU International 128, Supplement 2, 4-60 (Abstract Presentation)
26. Zhao H, Chan VW, Castellani D, Chan EO, Ong WLK, Teoh JY et. al. Intravesical Chemohyperthermia vs. Bacillus Calmette-Guerin Instillation for Intermediate- and High-Risk Non-muscle Invasive Bladder Cancer: A Systematic Review and Meta-Analysis. Front Surg. 2021 Nov 23;8:775527. doi: 10.3389/fsurg.2021.775527. PMID: 34888347; PMCID: PMC8649716.
27. Chan VW, Tan WS, Leow JJ, Tan WP, Ong WLK, Teoh JY et al. Delayed surgery for localised and metastatic renal cell carcinoma: a systematic review and meta-analysis for the COVID-19 pandemic. World J Urol. 2021 May 24:1–9. doi: 10.1007/s00345-021-03734-1. PMID: 34031748; PMCID: PMC8143063.
28. William Ong Lay Keat, Shamsuddin Omar. Initial Experience and Outcome of Extracorporeal Shockwave Lithotripsy (ESWL) by Dornier Gemini EMSE 220-F XXP-HP in Hospital Sultanah Aminah, Johor Bahru Malaysia. MASH Journal 2020; 5(1):7
29. Daniele Castellani, Rodrigo Donalisio da Silva, Marcela Pelayo-Nieto, Edgar Linden-Castro, William Lay Keat Ong, Zainal Adwin, Yiloren Tanidir, Emanuele Rubilotta, Marilena Gubbiotti, Giacomo Maria Pirola, Marcelo Langer Wroclawski, Vineet Gauhar, Jon Mikel Iñarritu, Jeffrey J. Leow, Hegel Trujillo Santamaria, Jeremy Yuen-Chun Teoh; on behalf of the #UroSoMe Working Group. The past, the present and the future of #UroSoMe: a narrative review AME Med J 2020 | http://dx.doi.org/10.21037/amj-20-141
30. Ong LK, Sivaneswaran L, Mohd Najib A, Devindran M, Say BL, Rohan MJ. Triage of urology referrals and outpatient service during COVID-19 pandemic: experience from a single centre in Malaysia. Med J Malaysia. 2020 Jul;75(4):400-402. PMID: 32724002.
31. Dubin, J. M., Wyant, W. A., Balaji, N. C., Ong, W. L., Kettache, R. H., Haffaf, M., Zouari, S., Santillan, D., Autrán Gómez, A. M., Sadeghi-Nejad, H., Loeb, S., Borin, J. F., Gomez Rivas, J., Grummet, J., Ramasamy, R., & Teoh, J. Y. (2020). Telemedicine Usage Among Urologists During COVID-19: A Cross-Sectional Study. Journal of medical Internet research, 10.2196/21875. Advance online publication. https://doi.org/10.2196/21875
32. Ong WLK, Lechmiannandan S, Loeb S, Teoh JY. Urologic Services in Public Hospitals Suffered a Greater Detriment Than Private Hospitals During the Battle of COVID-19. Urology. 2020;144:269-270. doi:10.1016/j.urology.2020.07.010
33. Ong WLK, Lechmiannandan S, Manoharan D, Lee SB, Nagalingam P, Case Report of Bilateral Testicular Infarction due to Severe Bilateral Epididymo-orchitis: A Catastrophic Complication Causing Castration, International Journal of Surgery Case Reports (2020), doi:https://doi.org/10.1016/j.ijscr.2020.07.013
34. Teoh J-YCC, Ong WLK, et al. A Global Survey on the Impact of COVID-19 on Urological Services. Eur Urol (2020), https://doi.org/10.1016/j.eururo.2020.05.025
35. WLK Ong, S. Omar, PK Han. Rare Cause Of Acute Scrotal Swelling And Pain In Adult- A Case Report On Spontaneous Pampiniform Plexus Thrombosis and literature review, Urology Case Reports (2019), https://doi.org/10.1016/j.eucr. 2019.101000
36. WLK Ong, S. Omar. Complications of Penile Clamp Circumcision: Cases Reported in a Tertiary Hospital Malaysia. MASH Journal 2019; 4(1):5; 28-33
37. Tan JH, Lip HTC, Ong WLK, et al. Intrauterine contraceptive device embedded in bladder wall with calculus formation removed successfully with open surgery. Malays Fam Physician. 2019;14(2);29–31. PMID: 31827733; PMCID: PMC6818694.
38. Rare cause of acute scrotal swelling and pain in adult – a case report on spontaneous pampiniform plexus thrombosis & literature review. International Journal of Urology (2019) 26 (Suppl. 2), 111—233 (Abstract presentation)
39. Clinical audit: initial experience and outcome of extracorporeal shockwave lithotripsy (ESWL) by Dornier Gemini EMSE 220F XXP-HP in Hospital Sultanah Aminah, Johor Bahru, Malaysia. International Journal of Urology (2019) 26 (Suppl. 2), 111—233 (Abstract presentation)
40. Spindle cell carcinoma of the penis- A rare yet malignant histological entity. 2018 BJU International 122, Supplement 4, 4-30 (Abstract Presentation)
41. A rare case of polyorchidism: four testes. 2018 BJU International 122, Supplement 4, 4-30 (Abstract Presentation)
42. A rare case of spontaneous ureteral rupture caused by a ureteric stone. 2018 BJU International 122, Supplement 4, 4-30 (Abstract Presentation)
43. Iatrogenic ureteric injuries: Aetiology and Management. 2018 BJU International 122, Supplement 4, 4-30 (Abstract Presentation)
44. Successful penile reimplantation post psychosis induced self -mutilation. 2018 BJU International 122, Supplement 4, 4-30 (Abstract Presentation)
45. Thulium enucleation of Prostate (ThuLEP): For the beginners, by the beginner: 2017 BJU International Published by John Wiley & Sons Ltd 120, Supplement 4, 5-37 (Video Conference Presentation)
46. Penile clamp circumcision: Is it a safer technique compared to the conventional dissection surgery? 2017 BJU International Published by John Wiley & Sons Ltd | 122, Supplement 1, 4—59 (Abstract Presentation)
47. Case series: Single tertiary care hospital’s review on diagnosis and surgical management of penile fractures: 2017 BJU International Published by John Wiley & Sons Ltd | 122, Supplement 1, 4—59(Abstract Presentation)
48. Case report: Multiple penises in a young patient: 2016 BJU International Published by John Wiley & SonsLtd | 118, Supplement 4, 5—38 (Abstract Presentation)
49. Case report: Gigantic staghorn calculus in left solitary functioning kidney: 2015 BJU International Published by John Wiley & Sons Ltd 116, Supplement4, 1-27 (Abstract Presentation)
50. Case report of simultaneous bilateral transitional cell carcinoma of ureters: 2015 BJU International Published by John Wiley & Sons Ltd 116, Supplement 4, 1-27 (Abstract Presentation)