Publications - Chunhee R. Choo, M.D.

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  1. Khan L, Choo R, Breen D, Assaad D, Fialkov J, Antonyshyn O, McKenzie D, Woo T, Zhang L, Barnes E. Recommendations for CTV margins in radiotherapy planning for non melanoma skin cancer. Radiother Oncol. 2012 Aug; 104(2):263-6. Epub 2012 Jul 31.
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  2. Quon H, Cheung PC, Loblaw DA, Morton G, Pang G, Szumacher E, Danjoux C, Choo R, Kiss A, Mamedov A, Deabreu A. Quality of life after hypofractionated concomitant intensity-modulated radiotherapy boost for high-risk prostate cancer. Int J Radiat Oncol Biol Phys. 2012 Jun 1; 83(2):617-23. Epub 2011 Nov 11.
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  3. Hallemeier CL, Pisansky TM, Davis BJ, Choo R. Long-term outcomes of radiotherapy for stage II testicular seminoma-the Mayo Clinic experience. Urol Oncol. 2012 Apr 24. [Epub ahead of print]
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  4. Hallemeier CL, Choo R, Davis BJ, Pisansky TM, Gunderson LL, Leibovich BC, Haddock MG. Long-term outcomes after maximal surgical resection and intraoperative electron radiotherapy for locoregionally recurrent or locoregionally advanced primary renal cell carcinoma. Int J Radiat Oncol Biol Phys. 2012 Apr 1; 82(5):1938-43. Epub 2011 Apr 20.
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  5. Call J, Karnes RJ, Choo R. Current management approach for patients with PSA relapse following radical prostatectomy. Interventional Oncology Society Journal. 2012 March; 2(1):37-47.
  6. Quon H, Cheung PC, Loblaw DA, Morton G, Pang G, Szumacher E, Danjoux C, Choo R, Thomas G, Kiss A, Mamedov A, Deabreu A. Hypofractionated concomitant intensity-modulated radiotherapy boost for high-risk prostate cancer: late toxicity. Int J Radiat Oncol Biol Phys. 2012 Feb 1; 82(2):898-905. Epub 2011 Jan 14.
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  7. Choo CS, Mamedov A, Chung M, Choo R, Kiss A, Danjoux C. Vitamin D insufficiency is common in patients with nonmetastatic prostate cancer. Nutr Res. 2011 Jan; 31(1):21-6.
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  8. Choo R, Call J, Danjoux C. Prostate cancer : Antiandrogen therapy during and after radiation therapy. Oncology Exchange. 2011; 10(2):33-5.
  9. Choo R, Quevedo F, Choo CS, Blute M. Can radiotherapy be a viable salvage treatment option for the relapsed seminoma confined to the infra-diaphragm region recurring after primary chemotherapy for bulky stage II seminoma? Can Urol Assoc J. 2010 Oct; 4(5):E137-40.
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  10. Choo R, Long J, Gray R, Morton G, Gardner S, Danjoux C. Prospective survey of sexual function among patients with clinically localized prostate cancer referred for definitive radiotherapy and the impact of radiotherapy on sexual function. Support Care Cancer. 2010 Jun; 18(6):715-22. Epub 2009 Jun 09.
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  11. Choo R. Salvage Radiotherapy for Patients with PSA Relapse Following Radical Prostatectomy: Issues and Challenges. Cancer Res Treat. 2010 Mar; 42(1):1-11. Epub 2010 Mar 31.
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  12. Hallemeier CL, Kohli M, Chandan VS, Miller RC, Choo R. Multiple urinary bladder masses from metastatic prostate adenocarcinoma. Rare Tumors. 2010; 2(4):e65. Epub 2010 Dec 31.
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  13. Choo R, Danjoux C, Gardner S, Morton G, Szumacher E, Loblaw DA, Cheung P, Pearse M. Efficacy of salvage radiotherapy plus 2-year androgen suppression for postradical prostatectomy patients with PSA relapse. Int J Radiat Oncol Biol Phys. 2009 Nov 15; 75(4):983-9. Epub 2009 May 04.
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  14. Choo R, Danjoux C, Gardner S, Morton G, Szumacher E, Loblaw DA, Cheung P, Pearse M. Prospective study evaluating postoperative radiotherapy plus 2-year androgen suppression for post-radical prostatectomy patients with pathologic T3 disease and/or positive surgical margins. Int J Radiat Oncol Biol Phys. 2009 Oct 1; 75(2):407-12. Epub 2009 Feb 11.
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  15. Pisansky TM, Gold DG, Furutani KM, Macdonald OK, McLaren RH, Mynderse LA, Wilson TM, Hebl JR, Choo R. High-dose-rate brachytherapy in the curative treatment of patients with localized prostate cancer. Mayo Clin Proc. 2008 Dec; 83(12):1364-72.
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  16. Choo R, Pearse M, Danjoux C, Gardner S, Morton G, Szumacher E, Loblaw DA, Cheung P. Analysis of gastrointestinal and genitourinary morbidity of postoperative radiotherapy for pathologic T3 disease or positive surgical margins after radical prostatectomy using national cancer institute expanded common toxicity criteria. Int J Radiat Oncol Biol Phys. 2008 Nov 15; 72(4):989-95. Epub 2008 Apr 23.
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  17. Pearse M, Choo R, Danjoux C, Gardner S, Morton G, Szumacher E, Loblaw A, Cheung P. Prospective assessment of gastrointestinal and genitourinary toxicity of salvage radiotherapy for patients with prostate-specific antigen relapse or local recurrence after radical prostatectomy. Int J Radiat Oncol Biol Phys. 2008 Nov 1; 72(3):792-8. Epub 2008 Aug 15.
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  18. Yoon FH, Gardner SL, Danjoux C, Morton G, Cheung P, Choo R. Testosterone recovery after prolonged androgen suppression in patients with prostate cancer. J Urol. 2008 Oct; 180(4):1438-43; discussion 1443-4. Epub 2008 Aug 16.
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  19. Lim TS, Cheung PC, Loblaw DA, Morton G, Sixel KE, Pang G, Basran P, Zhang L, Tirona R, Szumacher E, Danjoux C, Choo R, Thomas G. Hypofractionated accelerated radiotherapy using concomitant intensity-modulated radiotherapy boost technique for localized high-risk prostate cancer: acute toxicity results. Int J Radiat Oncol Biol Phys. 2008 Sep 1; 72(1):85-92. Epub 2008 Mar 20.
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  20. Choo R, Pearce A, Danjoux C, Morton G, Deboer G, Szumacher E, Loblaw A, Cheung P. Prospective evaluation of quality of life in prostate cancer patients receiving combined treatment of postoperative radiotherapy plus androgen suppression for PT3 or positive resection margin after radical prostatectomy. Eur Urol. 2007 Dec; 52(6):1645-50. Epub 2006 Nov 15.
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  21. Choo R, Danjoux C, Morton G, Szumacher E, Sugar L, Gardner S, Kim M, Choo CM, Klotz L. How much does Gleason grade of follow-up biopsy differ from that of initial biopsy in untreated, Gleason score 4-7, clinically localized prostate cancer? Prostate. 2007 Nov 1; 67(15):1614-20.
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  22. Schwartz DJ, Sengupta S, Hillman DW, Sargent DJ, Cheville JC, Wilson TM, Mynderse LA, Choo R, Davis BJ. Prediction of radial distance of extraprostatic extension from pretherapy factors. Int J Radiat Oncol Biol Phys. 2007 Oct 1; 69(2):411-8.
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  23. Choo R, Kawakami J, Siemens R, Davis BJ, Brundage M, Pisansky TM. Two different perspectives in the management of pT3 and/or margin-positive prostate cancer after radical prostatectomy. BJU Int. 2006 Oct; 98(4):773-6.
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  24. Vieth R, Choo R, Deboer L, Danjoux C, Morton GC, Klotz L. Rise in prostate-specific antigen in men with untreated low-grade prostate cancer is slower during spring-summer. Am J Ther. 2006 Sep-Oct; 13(5):394-9.
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  25. Pearce A, Choo R, Danjoux C, Morton G, Loblaw DA, Szumacher E, Cheung P, Deboer G, Chander S. Effect of combined treatment with salvage radiotherapy plus androgen suppression on quality of life in patients with recurrent prostate cancer after radical prostatectomy. Int J Radiat Oncol Biol Phys. 2006 May 1; 65(1):78-83. Epub 2006 Mar 24.
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  26. Lukka H, Hayter C, Julian JA, Warde P, Morris WJ, Gospodarowicz M, Levine M, Sathya J, Choo R, Prichard H, Brundage M, Kwan W. Randomized trial comparing two fractionation schedules for patients with localized prostate cancer. J Clin Oncol. 2005 Sep 1; 23(25):6132-8.
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  27. Choo R, Woo T, Assaad D, Antonyshyn O, Barnes EA, McKenzie D, Fialkov J, Breen D, Mamedov A. What is the microscopic tumor extent beyond clinically delineated gross tumor boundary in nonmelanoma skin cancers? Int J Radiat Oncol Biol Phys. 2005 Jul 15; 62(4):1096-9.
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  28. Chander S, Choo R, Danjoux C, Morton G, Pearse A, Deboer G, Szumacher E, Loblaw A, Cheung P, Woo T. Effect of androgen suppression on hemoglobin in prostate cancer patients undergoing salvage radiotherapy plus 2-year buserelin acetate for rising PSA after surgery. Int J Radiat Oncol Biol Phys. 2005 Jul 1; 62(3):719-24.
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  29. Cheung P, Sixel K, Morton G, Loblaw DA, Tirona R, Pang G, Choo R, Szumacher E, Deboer G, Pignol JP. Individualized planning target volumes for intrafraction motion during hypofractionated intensity-modulated radiotherapy boost for prostate cancer. Int J Radiat Oncol Biol Phys. 2005 Jun 1; 62(2):418-25.
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  30. Choo R, Thomas G, Woo T, Lee D, Kong B, Iscoe N, Danjoux C, Klotz L, Morton G, Chander S. Long-term outcome of postorchiectomy surveillance for stage I testicular seminoma. Int J Radiat Oncol Biol Phys. 2005 Mar 1; 61(3):736-40.
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  31. Choo R, Morton G, Danjoux C, Hong E, Szumacher E, DeBoer G. Limited efficacy of salvage radiotherapy for biopsy confirmed or clinically palpable local recurrence of prostate, carcinoma after surgery. Radiother Oncol. 2005 Feb; 74(2):163-7.
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  32. Woo TC, Choo R, Jamieson M, Chander S, Vieth R. Pilot study: potential role of vitamin D (Cholecalciferol) in patients with PSA relapse after definitive therapy. Nutr Cancer. 2005; 51(1):32-6.
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  33. Choo R, Chander S, Danjoux C, Morton G, Pearse A, DeBoer G, Szumacher E, Loblaw A, Cheung P, Woo T. How are hemoglobin levels affected by androgen suppression in non-metastatic prostate cancer patients? Can J Urol. 2005; 12:2547-2552.
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  34. Woo TC, Choo R, Chander S. An unusual case of concurrent breast and prostate cancer. Can J Urol. 2004 Oct; 11(5):2390-2.
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  35. Choo R, Klotz L, Deboer G, Danjoux C, Morton GC. Wide variation of prostate-specific antigen doubling time of untreated, clinically localized, low-to-intermediate grade, prostate carcinoma. BJU Int. 2004 Aug; 94(3):295-8.
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  36. Bagnell S, Choo R, Klotz LH, Chaterjee S. Practice patterns of Canadian urologists in the management of stage I testicular seminoma. Can J Urol. 2004 Apr; 11(2):2194-9.
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  37. Choo R, Do V, Sugar L, Klotz L, Bahk E, Hong E, Danjoux C, Morton G, DeBoer G. Comparison of histologic grade between initial and follow-up biopsy in untreated, low to intermediate grade, localized prostate cancer. Can J Urol. 2004 Feb; 11(1):2118-24.
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  38. Choo R, Sugar L, Hong E, Mackenzie K, DeBoer G, Danjoux C, Morton G, Klotz L. Is there a progression of histologic grade from radical prostatectomy to local recurrence in patients with clinically isolated local recurrence following surgery? Can J Urol. 2003 Oct; 10(5):1981-5.
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  39. Yap BK, Choo R, Deboer G, Klotz L, Danjoux C, Morton G. Are serial bone scans useful for the follow-up of clinically localized, low to intermediate grade prostate cancer managed with watchful observation alone? BJU Int. 2003 May; 91(7):613-7.
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  40. Hruby G, Choo R, Jackson M, Warde P, Sandler H. Management preferences following radical inguinal orchidectomy for Stage I testicular seminoma in Australasia. Australas Radiol. 2002 Sep; 46(3):280-4.
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  41. Bunting PS, DeBoer G, Choo R, Danjoux C, Klotz L, Fleshner N. Intraindividual variation of PSA, free PSA and complexed PSA in a cohort of patients with prostate cancer managed with watchful observation. Clin Biochem. 2002 Sep; 35(6):471-5.
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  42. Do V, Choo R, Deboer G, Herschorn S, Danjoux C, Chen CH, Barak I. Urodynamic findings 3 months after radiotherapy in patients treated with conformal external beam radiotherapy for prostate carcinoma. BJU Int. 2002 Jul; 90(1):62-7.
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  43. Choo R, Hruby G, Hong J, Bahk E, Hong E, Danjoux C, Morton G, DeBoer G. (IN)-efficacy of salvage radiotherapy for rising PSA or clinically isolated local recurrence after radical prostatectomy. Int J Radiat Oncol Biol Phys. 2002 Jun 1; 53(2):269-76.
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  44. Choo R, Do V, Herschorn S, DeBoer G, Danjoux C, Morton G, Cheng CH, Barak I, Preiner J. Urodynamic changes at 18 months post-therapy in patients treated with external beam radiotherapy for prostate carcinoma. Int J Radiat Oncol Biol Phys. 2002 Jun 1; 53(2):290-6.
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  45. Klotz LH, Choo R, Morton G, Danjoux C. Expectant management with selective delayed intervention for favorable-risk prostate cancer. Can J Urol. 2002 Jun; 9 Suppl 1:2-7.
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  46. Do V, Choo R, De Boer G, Klotz L, Danjoux C, Morton G, Szumacher E, Fleshner N, Bunting P. The role of serial free/total prostate-specific antigen ratios in a watchful observation protocol for men with localized prostate cancer. BJU Int. 2002 May; 89(7):703-9.
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  47. Choo R, Klotz L, Danjoux C, Morton GC, DeBoer G, Szumacher E, Fleshner N, Bunting P, Hruby G. Feasibility study: watchful waiting for localized low to intermediate grade prostate carcinoma with selective delayed intervention based on prostate specific antigen, histological and/or clinical progression. J Urol. 2002 Apr; 167(4):1664-9.
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  48. Choo R, Sandler H, Warde P, Hruby G, DeBoer G. Survey of radiation oncologists: practice patterns of the management of stage I seminoma of testis in Canada and a selected group in the United States. Can J Urol. 2002 Apr; 9(2):1479-85.
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  49. Choo R, Hruby G, Hong J, Hong E, DeBoer G, Danjoux C, Morton G, Klotz L, Bhak E, Flavin A. Positive resection margin and/or pathologic T3 adenocarcinoma of prostate with undetectable postoperative prostate-specific antigen after radical prostatectomy: to irradiate or not? Int J Radiat Oncol Biol Phys. 2002 Mar 1; 52(3):674-80.
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  50. Grimaldi J, Fleshner N, DeBoer G, Choo R, Klotz L. Outcomes of 200 patients with localized prostate cancer enrolled in a watchful waiting protocol. UroOncology. 2002; 2:93-4.
  51. Lock M, Loblaw DA, Choo R, Imrie K. Disseminated intravascular coagulation and PC-SPES: a case report and literature review. Can J Urol. 2001 Aug; 8(4):1326-9.
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  52. Choo R, DeBoer G, Klotz L, Danjoux C, Morton GC, Rakovitch E, Fleshner N, Bunting P, Kapusta L, Hruby G. PSA doubling time of prostate carcinoma managed with watchful observation alone. Int J Radiat Oncol Biol Phys. 2001 Jul 1; 50(3):615-20.
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  53. Hruby G, Choo R, Klotz L, Danjoux C, Murphy J, Deboer G, Morton G, Rakovitch E, Szumacher E, Fleshner N. The role of serial transrectal ultrasonography in a 'watchful waiting' protocol for men with localized prostate cancer. BJU Int. 2001 May; 87(7):643-7.
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  54. Crook J, Lukka H, Klotz L, Bestic N, Johnston M, Genitourinary Cancer Disease Site Group of the Cancer Care Ontario Practice Guidelines Initiative. Systematic overview of the evidence for brachytherapy in clinically localized prostate cancer. CMAJ. 2001 Apr 3; 164(7):975-81.
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  55. Hruby G, Choo R, Lehman M, Herschorn S, Kapusta L. Female clear cell adenocarcinoma arising within a urethral diverticulum. Can J Urol. 2000 Dec; 7(6):1160-3.
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  56. Choo CR, Danjoux C, Morton G. Should pathological T3 and/or margin positive prostate cancer receive adjuvant therapy? A radiation oncologist’s view. Can J Urol. 2000; 7:1043-50.
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  57. MacKenzie R, Balogh J, Choo R, Franssen E. Accelerated radiotherapy with delayed concomitant boost in locally advanced squamous cell carcinoma of the head and neck. Int J Radiat Oncol Biol Phys. 1999 Oct 1; 45(3):589-95.
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  58. Nam RK, Fleshner N, Rakovitch E, Klotz L, Trachtenberg J, Choo R, Morton G, Danjoux C. Prevalence and patterns of the use of complementary therapies among prostate cancer patients: an epidemiological analysis. J Urol. 1999 May; 161(5):1521-4.
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  59. Iscoe NA, Bruera E, Choo RC. Prostate cancer: 10. Palliative care. CMAJ. 1999 Feb 9; 160(3):365-71.
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  60. International collaboration of trialists on behalf of the Medical Research Council Advanced Bladder Working Party, EORTC Genito-Urinary Group, Australian Bladder Cancer Study Group, National Cancer Institute of Canada Clinical Trials Group, Finnbladder, N Neoadjuvant cisplatin, methotrexate, vinblastine chemotherapy for muscle-invasive bladder cancer: a randomized controlled trial. Lancet. 1999; 354:533-540.
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  61. Flavin A, Choo R, Franssen E, Danjoux C, Morton G. Pathological T3 and/or margin positive prostate adenocarcinoma with undetectable postoperative PSA - to irradiate or not?: analysis of freedom from PSA failure. Can J Urol. 1998 Jun; 5(2):544-550.
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  62. Choo R, Flavin A, Danjoux CE, Klotz LH. Can radiotherapy salvage isolated local recurrence following radical prostatectomy? Can J Urol. 1997 Sep; 4(3):395-399.
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  63. Danjoux CE, DeBoer G, Choo RC, Iscoe NA, Morton GC, Young CS, Bjarnason GA, Klotz LH. Survey of consecutive prostate cancer patients attending the Toronto Sunnybrook Regional Cancer Centre (TSRCC). Can J Urol. 1996 Nov; 3(4):268-276.
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  64. Choo R, Grimard L, Esche B, Crook J, Genest P, Odell P. Brachytherapy of neck metastases. J Otolaryngol. 1993 Feb; 22(1):54-7.
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  65. Choo R, Tannock I. Chemotherapy for recurrent or metastatic carcinoma of the nasopharynx. A review of the Princess Margaret Hospital experience. Cancer. 1991 Nov 15; 68(10):2120-4.
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