Research Topics
Species | Juanita CrookSummaryAffiliation: University of Toronto Country: Canada Publications
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Publications
Iodine versus palladium for prostate brachytherapy: the controversy continuesJuanita Crook
Department of Radiation Oncology, University of Toronto/University Health Network, Princess Margaret Hospital, 610 University Avenue, Toronto, Ontario M5G 2M9, Canada
Cancer J 10:156-7. 2004
MRI-CT fusion to assess postbrachytherapy prostate volume and the effects of prolonged edema on dosimetry following transperineal interstitial permanent prostate brachytherapyJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, 610 University Avenue, Toronto, Canada, M5G 2M9
Brachytherapy 3:55-60. 2004..Routine use of MRI-CT fusion reveals significant prostate edema may persist several weeks. This study evaluates the effect of edema, and its subsequent resolution, on dosimetry...
Report of a multicenter Canadian phase III randomized trial of 3 months vs. 8 months neoadjuvant androgen deprivation before standard-dose radiotherapy for clinically localized prostate cancerJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, 610 University Avenue, Toronto, Ontario M5G 2M9, Canada
Int J Radiat Oncol Biol Phys 60:15-23. 2004..8 months of neoadjuvant hormonal therapy before conventional dose radiotherapy (RT) on disease-free survival using prostate-specific antigen PSA and biopsies as end points for clinically localized prostate cancer...
Interobserver variation in postimplant computed tomography contouring affects quality assessment of prostate brachytherapyJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, Ontario, Canada
Brachytherapy 1:66-73. 2002..Outcome depends on implant quality, but perceived implant quality depends on accurate prostate contouring. This study documents inter observer variation in prostate contouring on post implant CT scans...
Twenty-four-month postradiation prostate biopsies are strongly predictive of 7-year disease-free survival: results from a Canadian randomized trialJuanita M Crook
Department of Radiation Oncology, Princess Margaret Hospital, Toronto, Ontario, Canada
Cancer 115:673-9. 2009....
Surgery versus implant for early prostate cancer: what is equivalence?Juanita Crook
University of Toronto Princess Margaret Hospital, Toronto, ON, Canada
Cancer J 13:223-5. 2007
PSA kinetics and PSA bounce following permanent seed prostate brachytherapyJuanita Crook
Department of Radiation Oncology, University Health Network, Princess Margaret Hospital, Toronto, Ontario, Canada
Int J Radiat Oncol Biol Phys 69:426-33. 2007..To report the incidence, timing, and magnitude of the benign prostate-specific antigen (PSA) bounce after 125I prostate brachytherapy and correlate the bounce with clinical and/or dosimetric factors...
A phase III randomized trial of the timing of meloxicam with iodine-125 prostate brachytherapyJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, Ontario, Canada
Int J Radiat Oncol Biol Phys 77:496-501. 2010..We hypothesized that a cyclooxygenase-2 (COX-2) inhibitor regimen started 1 week prior to seed implant might diminish the inflammatory response, thus reducing edema, retention rates, and symptom severity...
Radiation therapy in the management of the primary penile tumor: an updateJuanita Crook
Department of Radiation Oncology, University of Toronto, Princess Margaret Hospital, University Health Network, 610 University Avenue, Toronto, ON, M5G 2M9, Canada
World J Urol 27:189-96. 2009..We have used primary penile brachytherapy as the treatment of choice for T1, T2 and selected T3 patients since 1989 and present updated results for 67 patients...
Penile brachytherapy: results for 49 patientsJuanita M Crook
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Princess Margaret Hospital, Toronto, Ontario, Canada
Int J Radiat Oncol Biol Phys 62:460-7. 2005....
Final report of multicenter Canadian Phase III randomized trial of 3 versus 8 months of neoadjuvant androgen deprivation therapy before conventional-dose radiotherapy for clinically localized prostate cancerJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, Toronto, ON, Canada
Int J Radiat Oncol Biol Phys 73:327-33. 2009..To evaluate the effect of 3 vs. 8 months of neoadjuvant hormonal therapy before conventional-dose radiotherapy (RT) on disease-free survival for localized prostate cancer...
Median 5 year follow-up of 125iodine brachytherapy as monotherapy in men aged<or=55 years with favorable prostate cancerAlfonso Gómez-Iturriaga Piña
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, Canada
Urology 75:1412-6. 2010..To report the genitourinary (GU) and gastrointestinal (GI) toxicity rates, erectile function preservation, and biochemical outcome (bNED) in men aged<or=55 years treated with 125iodine (125I) brachytherapy (BT)...
Rectal-wall dose dependence on postplan timing after permanent-seed prostate brachytherapyDaniel Taussky
Department of Radiation Oncology, Princess Margaret Hospital, Toronto, Canada
Int J Radiat Oncol Biol Phys 65:358-63. 2006..Critical-organ dose reporting and guidelines for minimizing toxicity must take into account the time of the assessment...
Phase II trial of hypofractionated image-guided intensity-modulated radiotherapy for localized prostate adenocarcinomaJarad M Martin
Department of Radiation Oncology, Princess Margaret Hospital, University of Toronto, Toronto, ON, Canada
Int J Radiat Oncol Biol Phys 69:1084-9. 2007..To assess in a prospective trial the feasibility and late toxicity of hypofractionated radiotherapy (RT) for prostate cancer...
Sequential evaluation of prostate edema after permanent seed prostate brachytherapy using CT-MRI fusionDaniel Taussky
Department of Radiation Oncology, Princess Margaret Hospital, 610 University Avenue, Toronto, Ontario M5G 2M9, Canada
Int J Radiat Oncol Biol Phys 62:974-80. 2005..Dose coverage of the prostate was good for all patients during Days 1-30. Our data indicate that postimplant dosimetry on the day of implant is sufficient for patients with good dose coverage (Day 1 V(100) >93%)...
10-year experience with I-125 prostate brachytherapy at the Princess Margaret Hospital: results for 1,100 patientsJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, Toronto, Ontario, Canada
Int J Radiat Oncol Biol Phys 80:1323-9. 2011..To report outcomes for 1,111 men treated with iodine-125 brachytherapy (BT) at a single institution...
A phase II study of localized prostate cancer treated to 75.6 Gy with 3D conformal radiotherapyAlan Nichol
Radiation Medicine Program, Princess Margaret Hospital and University of Toronto, Toronto, Canada
Radiother Oncol 76:11-7. 2005..CONCLUSIONS: 75.6 Gy caused modest levels of acute and late toxicity. Three-year biopsies predicted subsequent biochemical outcome...
Mature results of the Ottawa phase II study of intermittent androgen-suppression therapy in prostate cancer: clinical predictors of outcomeShawn Malone
Department of Radiation and Medical Oncology, Ottawa Hospital Regional Cancer Centre, Ottawa, Ontario, Canada
Int J Radiat Oncol Biol Phys 68:699-706. 2007..To present the mature experience of a phase II trial of intermittent androgen suppression (IAS)...
Magnetic resonance imaging-defined treatment margins in iodine-125 prostate brachytherapyJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, Toronto, ON, Canada
Int J Radiat Oncol Biol Phys 77:1079-84. 2010..We calculated implant quality parameters, D90 and V100, for the magnetic resonance imaging (MRI)-defined prostate plus 2, 3, and 5 mm...
Sequential comparison of seed loss and prostate dosimetry of stranded seeds with loose seeds in 125I permanent implant for low-risk prostate cancerElantholi P Saibishkumar
Department of Radiation Oncology, Princess Margaret Hospital, Toronto, ON, Canada
Int J Radiat Oncol Biol Phys 73:61-8. 2009..To compare stranded seeds (SSs) with loose seeds (LSs) in terms of prostate edema, dosimetry, and seed loss after (125)I brachytherapy...
Factors influencing risk of acute urinary retention after TRUS-guided permanent prostate seed implantationJuanita Crook
Department of Radiation Oncology, University Health Network, Princess Margaret Hospital, Toronto, Ontario, Canada
Int J Radiat Oncol Biol Phys 52:453-60. 2002..Prostate size was the major determinant of AUR. For any given prostate size, prior androgen ablation increased the risk of AUR. Men with larger prostates should be aware of the increased risk when contemplating brachytherapy...
Patient-assessed late toxicity rates and principal component analysis after image-guided radiation therapy for prostate cancerMarketa Skala
Department of Radiation Oncology, Princess Margaret Hospital, University of Toronto, Toronto, ON, Canada
Int J Radiat Oncol Biol Phys 68:690-8. 2007....
The effect of obesity on rectal dosimetry after permanent prostate brachytherapyNikhilesh Patil
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, Canada
Brachytherapy 8:218-22. 2009..We hypothesized that men with higher BMI will have a lower dose to the rectal wall and less rectal toxicity after permanent prostate implant...
Biochemical disease-free rate and toxicity for men treated with iodine-125 prostate brachytherapy with d(90) ≥180 GyAlfonso Gómez-Iturriaga Piña
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, ON, Canada
Int J Radiat Oncol Biol Phys 78:422-7. 2010..We examined the clinical outcomes and toxicity profile of men receiving a D(90) (isodose enclosing 90% of the prostate) of ≥180 Gy...
Polarographic electrode study of tumor oxygenation in clinically localized prostate cancerChris Parker
Department of Biostatistics, Princess Margaret Hospital, Toronto, ON, Canada
Int J Radiat Oncol Biol Phys 58:750-7. 2004..HP(5), as determined in this study, should adequately discriminate among patients with prostate cancer and allow the independent prognostic significance of oxygenation to be evaluated once the study matures...
Long-term side-effects of intermittent androgen suppression therapy in prostate cancer: results of a phase II studyShawn Malone
Department of Radiation and Medical Oncology, Ottawa Hospital Regional Cancer Centre, Ottawa, Ontario, Canada
BJU Int 96:514-20. 2005..To assess the feasibility and tolerability of intermittent androgen suppression therapy (IAS) in prostate cancer...
A cinematic magnetic resonance imaging study of milk of magnesia laxative and an antiflatulent diet to reduce intrafraction prostate motionAlan M Nichol
Radiation Medicine Program, Princess Margaret Hospital and University of Toronto, Toronto, Canada
Int J Radiat Oncol Biol Phys 77:1072-8. 2010..To determine the reduction of prostate motion during a typical radiotherapy (RT) fraction from a bowel regimen comprising an antiflatulent diet and daily milk of magnesia...
A randomized trial of supine vs. prone positioning in patients undergoing escalated dose conformal radiotherapy for prostate cancerAndrew John Bayley
Department of Radiation Oncology, Radiation Medicine Program, Princess Margaret Hospital, University Health Network, University of Toronto, 610 University Avenue, Toronto, Ont, Canada M5G 2M9
Radiother Oncol 70:37-44. 2004..Supine positioning has been adopted as the standard for conformal prostatic irradiation at our centre...
Posttreatment complications of early-stage prostate cancer patients: brachytherapy versus three-dimensional conformal radiation therapyGrace Tsui
R.T.T. Department of Radiation Therapy, Princess Margaret Hospital, 610 University Hospital, Toronto, Ontario, Canada M5G 2M9
Cancer J 11:122-32. 2005..In the absence of a randomized clinical trial, such a comparison can be helpful both in counseling patients as to what to expect from either treatment and in facilitating their treatment decision process...
Factors predicting an increased dose to the penile bulb in permanent seed prostate brachytherapyDaniel Taussky
Department of Radiation Oncology, Princess Margaret Hospital, 610 University Avenue, Toronto, Ontario M5G 2M9, Canada
Brachytherapy 3:125-9. 2004..This may reduce the incidence of erectile dysfunction and urinary toxicity after permanent seed prostate brachytherapy...
The utility of transition zone index in predicting acute urinary morbidity after 125I prostate brachytherapyJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital/University Health Network, University of Toronto, Toronto, Ontario, Canada
Brachytherapy 1:131-7. 2002..TZ index, initial prostate volume, and use of neoadjuvant hormones are interrelated and are all predictive of AUR in univariate analysis, but in multivariate analysis, TZ index is not an independent prognostic factor...
3D MR-spectroscopic imaging assessment of metabolic activity in the prostate during the PSA "bounce" following 125iodine brachytherapyAnna Kirilova
Department of Radiation Oncology, Princess Margaret Hospital, University of Toronto, Toronto, Canada
Int J Radiat Oncol Biol Phys 79:371-8. 2011....
Recurrent prostate cancer following external beam radiotherapy: follow-up strategies and managementCharles Catton
Department of Radiation Oncology, University of Toronto, Princess Margaret Hospital, 610 University Avenue, Toronto, Ontario M5G 2M9, Canada
Urol Clin North Am 30:751-63. 2003....
Radiation dose to the internal pudendal arteries from permanent-seed prostate brachytherapy as determined by time-of-flight MR angiographyCaitlin Gillan
Department of Radiation Medicine, University Health Network, Princess Margaret Hospital, Toronto, Canada
Int J Radiat Oncol Biol Phys 65:688-93. 2006..The IPAs receive a low but calculable dose from permanent-seed (125)I brachytherapy. Further research is needed to determine if this outcome has any correlation with subsequent potency...
Contemporary management of prostate cancer: a practice survey of Ontario genitourinary radiation oncologistsGeorge Rodrigues
Department of Radiation Oncology, London Regional Cancer Centre, London, Ont. N6A 4L6, Canada
Radiother Oncol 69:63-72. 2003..Current clinical practice in localized prostate cancer reflects the evolving information in the published medical literature...
Impact of a multi-disciplinary patient education session on accrual to a difficult clinical trial: the Toronto experience with the surgical prostatectomy versus interstitial radiation intervention trialKris Wallace
Department of Radiation Medicine and the Division of Urology, Princess Margaret Hospital, University Health Network, Toronto, Canada
J Clin Oncol 24:4158-62. 2006....
Effectiveness of educational intervention on the congruence of prostate and rectal contouring as compared with a gold standard in three-dimensional radiotherapy for prostateEwa Szumacher
Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
Int J Radiat Oncol Biol Phys 76:379-85. 2010..To examine effects of a teaching intervention on precise delineation of the prostate and rectum during planning of three-dimensional conformal radiotherapy (3D-CRT) for prostate cancer...
Changing management of localized prostate cancer: a comparison survey of Ontario radiation oncologistsJarad Martin
Division of Radiation Oncology, Princess Margaret Hospital, Toronto, Ontario, Canada
Can J Urol 13:26-33. 2006..CONCLUSIONS: There have been significant changes in the way that prostate cancer is managed with radiotherapy in Ontario between 2002 and 2005. Dose escalation and more complex treatment planning is widely evident...
Relationship of the International Prostate Symptom score with urinary flow studies, and catheterization rates following 125I prostate brachytherapyChandra Martens
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, Ontario, Canada
Brachytherapy 5:9-13. 2006..CONCLUSIONS: Pretreatment IPS questionnaire and urinary flow studies assist in predicting risk of urinary morbidity and retention post-125I brachytherapy for prostate cancer...
The efficacy of hyperbaric oxygen therapy in the treatment of medically refractory soft tissue necrosis after penile brachytherapyAlfonso Gomez-Iturriaga
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, Ontario, Canada
Brachytherapy 10:491-7. 2011..Hyperbaric oxygen therapy (HBO) has a well-defined role in the treatment of late radiation toxicities. We present experience with HBO for medically refractory soft tissue necrosis after penile brachytherapy...
Breast cancer in a BRCA2 mutation carrier with a history of prostate cancerSeema Panchal
University of Toronto, Toronto, Ontario, Canada
Nat Rev Clin Oncol 6:604-7. 2009..Aside from notable gynecomastia, he remained asymptomatic. He has a strong family history of breast cancer with multiple sisters affected...
Interstitial brachytherapy for penile cancer: an alternative to amputationJuanita Crook
Department of Radiation Oncology, University Health Network, Princess Margaret Hospital, Toronto, Canada
J Urol 167:506-11. 2002..We recommend planned staging superficial inguinal node dissection 3 months after implantation for moderately and/or poorly differentiated tumors with clinically negative groins...
Long-term urinary sequelae following 125iodine prostate brachytherapyJuanita Crook
Department of Radiation Oncology, University Health Network, Princess Margaret Hospital, Toronto, Ontario, Canada
J Urol 179:141-5; discussion 146. 2008..We describe long-term urinary function in men treated with 125iodine brachytherapy without supplemental beam irradiation...
Pre-treatment risk stratification of prostate cancer patients: A critical reviewGeorge Rodrigues
Department of Radiation Oncology, London Health Sciences Centre, London, ON
Can Urol Assoc J 6:121-7. 2012....
The effect of voxel size on the accuracy of dose-volume histograms of prostate 125I seed implantsJean François Corbett
Department of Radiation Physics, Princess Margaret Hospital, Toronto, Ontario, Canada
Med Phys 29:1003-6. 2002..The single-seed DVH calculated by VariSeed fell below the hand calculation by up to 50% at low doses (30 Gy), and above it by over 50% at high doses (>250 Gy)...
Penile brachytherapy: technical aspects and postimplant issuesJuanita Crook
Department of Radiation Oncology, Princess Margaret Hospital, University of Toronto, Toronto, Ontario, Canada
Brachytherapy 9:151-8. 2010..We report our technique that has been developed and refined over the past 20 years...
The use of conformal radiotherapy and the selection of radiation dose in T1 or T2 low or intermediate risk prostate cancer - a systematic reviewMichael Brundage
Kingston Regional Cancer Centre, 25 King Street West, Ontario, Canada
Radiother Oncol 64:239-50. 2002..are biochemical freedom from failure (bNED) rates, clinical recurrence-free survival, disease-specific survival and acute and late toxicity; (b) what is the appropriate dose and fractionation prescription in this clinical setting?..
Success of sildenafil for erectile dysfunction in men treated with brachytherapy or external beam radiation for prostate cancerOren M Shemtov
School of Medicine, Queen's University, Kingston, Ontario, Canada
Can J Urol 11:2450-5. 2004..This may explain the poorer success in the external beam radiation patients. The success of sildenafil in both groups of patients was lower than has previously been reported...
The effect of radiation on semen quality and fertility in men treated with brachytherapy for early stage prostate cancerDilpreet K Singh
Division of Urology, Princess Margaret Hospital and Mount Sinai Hospital, Toronto, Ontario, Canada
J Urol 187:987-9. 2012..We determined the effects of prostatic brachytherapy on semen parameters and sperm DNA integrity, and the potential impact on fertility...
Radiation therapy for cancer of the penisJuanita Crook
British Columbia Cancer Agency, Cancer Center for the Southern Interior, Department of Radiation Oncology, Kelowna, British Columbia, Canada
Urol Clin North Am 37:435-43. 2010..Ideal tumors for brachytherapy should be less than 4 cm without extension onto the shaft. More advanced cases can be considered for external radiotherapy...
Critical organ dosimetry in permanent seed prostate brachytherapy: defining the organs at riskJuanita M Crook
Department of Radiation Oncology, Princess Margaret Hospital, Toronto, Canada
Brachytherapy 4:186-94. 2005..We set out to examine the existing data and propose a uniform method of reporting such that results from different centers can more easily be compared...
Treatment of the inguinal regions in penile cancer: a review of the literature and treatment proposalDaniel Taussky
Department of Radiation Oncology and Surgical Oncology, Princess Margaret Hospital and the University Health Network, University of Toronto, Toronto, Ontario, Canada
Can J Urol 13:2978-83. 2006..The literature, which consists mainly of retrospective studies of patients treated over several decades, is not conclusive. We undertook a literature review to address this issue and to propose...
Neonatal circumcision and invasive squamous cell carcinoma of the penis: a report of 3 cases and a review of the literatureElantholi P Saibishkumar
Department of Radiation Oncology, University Health Network, Princess Margaret Hospital, Toronto, Ont
Can Urol Assoc J 2:39-42. 2008..A history of remote HPV infection should increase the index of suspicion for any nonhealing penile lesion, despite a history of neonatal circumcision...
Radiation therapy and radio-nuclides for palliation of bone painJuanita Crook
Department of Radiation Oncology, University of Toronto Princess Margaret Hospital, 610 University Avenue, Toronto, Ontario M5G 2M9, Canada
Urol Clin North Am 33:219-26, vii. 2006..For multiple painful sites on both sides of the diaphragm, radiopharmaceuticals can be considered but will not treat adjacent soft tissue disease or neurologic compromise...
The nature and extent of urinary morbidity in relation to prostate brachytherapy urethral dosimetryMischel Neill
Department of Urology, Princess Margaret Hospital, 610 University Avenue, Toronto, Ontario, Canada
Brachytherapy 6:173-9. 2007..This study investigates whether the location and dose of urethral radiation received during transperineal interstitial permanent prostate brachytherapy determine the degree and type of urinary symptoms experienced subsequently...
Loose seeds vs. stranded seeds: a comparison of critical organ dosimetry and acute toxicity in (125)I permanent implant for low-risk prostate cancerElantholi P Saibishkumar
Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, Toronto, ON, Canada
Brachytherapy 7:200-5. 2008..To compare the critical organ dosimetry and toxicity of loose seeds (LS) with stranded seeds (SS) in (125)I permanent implant for low-risk prostate cancer...
