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Karabay O, Köse O, Tocoglu A, Uysal B, Dheir H, Yaylaci S, Guclu E. Investigation of the frequency of COVID-19 in patients treated with intravesical BCG. ACTA ACUST UNITED AC 2020; 66Suppl 2:91-95. [PMID: 32965364 DOI: 10.1590/1806-9282.66.s2.91] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 06/27/2020] [Indexed: 11/21/2022]
Abstract
INTRODUCTION In this retrospective study, we aimed to investigate the frequency of COVID-19 in patients with and without BCG application due to bladder tumors. METHODS The presence of COVID-19 was investigated in 167 patients with BCG and 167 without bladder cancer. All patients were compatible with COVID-19 infection. Patients with RT-PCR positive for SARS-CoV-2 and/or Chest CT positive for viral pneumonia between March and May 2020 were included in the study. RESULTS A total of 334 patients were included in the study. The mean age of the 167 patients in the study group was 71.1±14.2 1 (min. 38.0- max. 98.0 years), 141 (84.4%) were male. The mean age of the 167 patients in the control group was 70.5±13.8 years (min. 41.0- max. 96.0 years), and 149 were male (p> 0.05). COVID-19 was detected in 5 patients in the BCG group and in 4 patients in the control group (P> 0.05). CONCLUSION Intravesical BCG administration does not decrease the frequency of COVID-19 infection.
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Affiliation(s)
- Oğuz Karabay
- . Sakarya University Faculty of Medicine Department of Infectious Diseases, Sakarya, Turkey
| | - Osman Köse
- . Sakarya University Education and Research Hospital, Department of Urology, Sakarya, Turkey
| | - Aysel Tocoglu
- . Sakarya University Faculty of Medicine, Department of Internal Medicine, Sakarya, Turkey
| | - Burak Uysal
- . Sakarya University Education and Research Hospital, Department of Urology, Sakarya, Turkey
| | - Hamad Dheir
- . Sakarya University Faculty of Medicine, Department of Internal Medicine, Sakarya, Turkey
| | - Selcuk Yaylaci
- . Sakarya University Faculty of Medicine, Department of Internal Medicine, Sakarya, Turkey
| | - Ertugrul Guclu
- . Sakarya University Faculty of Medicine Department of Infectious Diseases, Sakarya, Turkey
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Yang GL, Zhang LH, Liu Q, Wang ZL, Duan XH, Huang YR, Bo JJ. A novel treatment strategy for newly diagnosed high-grade T1 bladder cancer: Gemcitabine and cisplatin adjuvant chemotherapy-A single-institution experience. Urol Oncol 2016; 35:38.e9-38.e15. [PMID: 28040419 DOI: 10.1016/j.urolonc.2016.08.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/10/2016] [Accepted: 08/27/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Management of high-grade T1 (formerly T1G3) bladder cancer continues to be controversial. Should patients with T1G3 bladder cancer have an immediate radical cystectomy or should they receive intravesical bacillus Calmette-Guérin-preserving bladder? Gemcitabine and cisplatin (GC) adjuvant chemotherapy may help to strike a balance between intravesical and early cystectomy. For purposes of this study, we continue to refer high-grade T1 lesion as "T1G3." OBJECTIVE To evaluate the characteristics and the long-term outcome of GC adjuvant chemotherapy in T1G3 bladder cancer after transurethral resection of bladder tumor (TURBT). MATERIALS AND METHODS We retrospectively reviewed 48 patients who were newly diagnosed with T1G3 bladder cancer between January 2009 and December 2012. A total of 48 patients received 4 cycles of GC adjuvant chemotherapy after TURBT. One month after 4 cycles of GC adjuvant chemotherapy, response was evaluated by re-TURBT. Median follow-up was 59.5 (range: 18-70) months, all patients have been observed for more than 3 years. Salvage cystectomy was recommended for patients with persistent disease and for tumor progression after initial complete response. RESULT Complete response was achieved in 44 (91.7%) patients. Of complete responders, 5 patients experienced recurrence and 5 patients showed progression. The progression rate and disease-specific survival rate were 10.4% and 91.7% at 3 years, respectively. More than 80% of survivors preserved their bladder. Kaplan-Meier curves showed that concomitant carcinoma in situ (CIS) was the only factor that had an influence on progression-free survival (P = 0.022) and disease-specific survival (P = 0.017). Concomitant CIS was the prognostic factor for progression rate and disease-specific survival rate at 3 years (P = 0.008 and P = 0.035). CONCLUSION GC adjuvant chemotherapy is a safe conservative treatment for T1G3 bladder cancer, but effective is really a phase II study. Patients with T1G3 bladder cancer with concomitant CIS should be treated more aggressively because of the high risk of progression.
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Affiliation(s)
- Guo-Liang Yang
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lian-Hua Zhang
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qiang Liu
- Department of Pathology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zhao-Liang Wang
- Department of Pathology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xue-Hui Duan
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yi-Ran Huang
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Juan-Jie Bo
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
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Steinberg RL, Thomas LJ, O'Donnell MA. Bacillus Calmette-Guérin (BCG) Treatment Failures in Non-Muscle Invasive Bladder Cancer: What Truly Constitutes Unresponsive Disease. Bladder Cancer 2015; 1:105-116. [PMID: 27376112 PMCID: PMC4927833 DOI: 10.3233/blc-150015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Bacillus Calmette-Guérin (BCG) remains the most effective intravesical therapy for non-muscle invasive bladder cancer but will fail in up to 40% of patients. The ability to identify patients who are least likely to respond to further BCG therapy allows urologists to pursue secondary treatments more likely to convey a recurrence or survival benefit to the patient. We examined the literature to determine what constitutes BCG unresponsive disease. After review, we believe that BCG unresponsive disease should be defined as (1) patients with recurrent high grade T1 disease within 6 months of their primary tumor after at least one course of BCG or patients who have failed at least 2 courses of BCG with either (2) persistent or recurrent pure papillary (Ta) disease within 6 months or (3) persistent or recurrent carcinoma in situ (CIS) within 12 months.
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Affiliation(s)
| | - Lewis J Thomas
- University of Iowa Department of Urology, Iowa City, IA, USA
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Daneshmand S. Determining the Role of Cystectomy for High-grade T1 Urothelial Carcinoma. Urol Clin North Am 2013; 40:233-47. [DOI: 10.1016/j.ucl.2013.01.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Factors affecting response to bacillus Calmette-Guérin plus interferon for urothelial carcinoma in situ. J Urol 2011; 186:817-23. [PMID: 21788050 DOI: 10.1016/j.juro.2011.04.073] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Indexed: 11/24/2022]
Abstract
PURPOSE The unpredictable behavior of carcinoma in situ and its high potential for recurrence and progression make identifying patient characteristics predicting a poor prognosis a priority. We assessed which factors affect the response to bacillus Calmette-Guérin plus interferon-α therapy in patients with urothelial carcinoma in situ. MATERIALS AND METHODS We analyzed data on a subset of 231 patients with carcinoma in situ enrolled in a multicenter, phase II trial of bacillus Calmette-Guérin plus interferon-α therapy for nonmuscle invasive bladder cancer. Analysis included patients who were bacillus Calmette-Guérin naïve and those with previous exposure to failed bacillus Calmette-Guérin therapy. We evaluated factors potentially affecting the bacillus Calmette-Guérin plus interferon-α response, including patient age, gender, tumor stage, multifocality, prior tumor stage, the previous bacillus Calmette-Guérin failure pattern, courses and maintenance, and prior chemotherapy. RESULTS The complete response rate at 3 and 6 months in naïve vs previously failed bacillus Calmette-Guérin cases was 76% and 70% vs 76% and 66%, respectively. The 24-month disease-free rate was decreased in the 53 patients with a history of 2 or more failed bacillus Calmette-Guérin courses vs that in the 71 with a history of 1 failed course and bacillus Calmette-Guérin naïve patients (23% vs 57% and 60%, respectively). The 22 patients with refractory carcinoma in situ had the worst outcome of a 23% disease-free rate at 24 months while the 59 with relapse within 1 year had an intermediate outcome of 42% vs 59% in the 33 with relapse after 1 year. Patients with a history of papillary disease did better than those without such a history (p=0.019). CONCLUSIONS Factors associated with a poor response to bacillus Calmette-Guérin plus interferon-α therapy in patients with carcinoma in situ are prior tumor stage, 2 or more prior bacillus Calmette-Guérin failures and a bacillus Calmette-Guérin failure pattern.
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A mathematical model of combined bacillus Calmette-Guerin (BCG) and interleukin (IL)-2 immunotherapy of superficial bladder cancer. J Theor Biol 2011; 277:27-40. [DOI: 10.1016/j.jtbi.2011.02.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 02/08/2011] [Accepted: 02/08/2011] [Indexed: 01/01/2023]
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Long-term outcomes of intravesical therapy for non-muscle invasive bladder cancer. World J Urol 2010; 29:59-71. [DOI: 10.1007/s00345-010-0617-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Accepted: 11/09/2010] [Indexed: 11/26/2022] Open
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Manfredi R, Dentale N, Piergentili B, Pultrone C, Brunocilla E. Tubercular disease caused by Bacillus of Calmette-Guérin as a local adjuvant treatment of relapsing bladder carcinoma. Cancer Biother Radiopharm 2010; 24:621-7. [PMID: 19877893 DOI: 10.1089/cbr.2009.0668] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Two (2) exemplary case reports of respiratory granulomatous infection caused by Bacillus of Calmette-Guérin (BCG), in patients who were repeatedly treated with local, intravesical adjuvant BCG therapy for a relapsing transitional bladder carcinoma, are outlined and discussed on the grounds of the cumbersome diagnostic and differential diagnostic process (especially when a prior tuberculosis and a concurrent chronic obstructive pulmonary disease are of concern), along with an updated literature revision. Only 4 cases of respiratory BCG-itis (pulmonary tuberculosis-like forms) have been reported, to date, to the best of our knowledge (2 of them following the bladder instillation of BCG). One (1) episode of ours represents the first described case with a dual, concomitant granulomatous localization of BCG-itis, also involving the genitourinary tract.
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Affiliation(s)
- Roberto Manfredi
- Department of Internal Medicine, Aging, and Nephrologic Diseases, Division of Infectious Diseases, Alma Mater Studiorum University of Bologna, S. Orsola-Malpighi Hospital, I-40138 Bologna, Italy.
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Kulkarni GS, Hakenberg OW, Gschwend JE, Thalmann G, Kassouf W, Kamat A, Zlotta A. An Updated Critical Analysis of the Treatment Strategy for Newly Diagnosed High-grade T1 (Previously T1G3) Bladder Cancer. Eur Urol 2010; 57:60-70. [DOI: 10.1016/j.eururo.2009.08.024] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Accepted: 08/26/2009] [Indexed: 11/16/2022]
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64-detector row CT cystography with virtual cystoscopy in the detection of bladder carcinoma: preliminary experience in selected patients. Radiol Med 2008; 114:52-69. [DOI: 10.1007/s11547-008-0350-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Accepted: 04/10/2008] [Indexed: 10/21/2022]
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Inoue M, Ishioka JI, Fukuda H, Kageyama Y, Saito Y, Higashi Y. Clinical outcome of chemoradiotherapy for T1G3 bladder cancer. Int J Urol 2008; 15:747-50. [DOI: 10.1111/j.1442-2042.2008.02077.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bensalah K, Patard JJ. [Management of T1G3 tumours of the bladder]. ANNALES D'UROLOGIE 2006; 40:93-100. [PMID: 16709007 DOI: 10.1016/j.anuro.2006.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
T1G3 tumours are the most aggressive superficial tumours of the bladder, with a high risk of recurrence and progression. Complete endoscopic resection of the tumour is the first diagnostic and therapeutic step in T1G3 management. A second resection should be done at 1 month to avoid residual tumour and misdiagnosis of a muscle infiltrative cancer. As a result of treatment by instillations of Calmette and Guérin bacillus following endoscopic resection, a 5-year survival rate of 80% has been reported, with 50 to 60% of bladder preservation. BCG is the only conservative treatment that has proven effectiveness on both tumour recurrence and progression. Long term protocols seem to give the best results. Endovesical chemotherapy is not commonly used as its impact on progression has not been demonstrated. Radical cystectomy can be chosen as first line treatment in patients with particularly aggressive tumours. Long term and close surveillance should be achieved in every patient.
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Affiliation(s)
- K Bensalah
- Hôpital Pontchaillou, 2, rue Henri-Le-Guilloux, 35033 Rennes, France
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Gofrit ON, Shapiro A, Pode D, Sidi A, Nativ O, Leib Z, Witjes JA, van der Heijden AG, Naspro R, Colombo R. Combined local bladder hyperthermia and intravesical chemotherapy for the treatment of high-grade superficial bladder cancer. Urology 2004; 63:466-71. [PMID: 15028439 DOI: 10.1016/j.urology.2003.10.036] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2003] [Accepted: 10/08/2003] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To evaluate the effectiveness of combined local bladder hyperthermia and intravesical chemotherapy for the treatment of patients with high-grade (G3) superficial bladder cancer. METHODS Patients with G3 bladder tumors (Stage Ta or T1) were treated with combined intravesical chemotherapy with mitomycin-C and local radiofrequency hyperthermia of the bladder wall. The patients were treated with either a prophylactic protocol (40 mg mitomycin-C) after complete transurethral resection of all tumors or with an ablative protocol (80 mg mitomycin-C) when visible tumor was seen on video-cystoscopy or bladder biopsies were positive for carcinoma in situ. RESULTS Combined chemo-thermotherapy was administered to 52 patients with high-grade superficial bladder cancer (40 patients with Stage T1 tumor, 11 with Ta, and 3 with concomitant or isolated carcinoma in situ). At a median follow-up of 15.2 months (mean 23, range 6 to 90), no stage progression to T2 or disease-related mortality had occurred. The bladder preservation rate was 86.5%. The prophylactic protocol was administered to 24 patients. After a mean follow-up of 35.3 months, 15 patients (62.5%) were recurrence free. The bladder preservation rate was 95.8%. The ablative protocol was administered to 28 patients. Complete ablation of the tumor was accomplished in 21 patients (75%). After a mean follow-up of 20 months, 80.9% of these patients were recurrence free. The bladder preservation rate for the ablative group was 78.6%. CONCLUSIONS Combined local bladder hyperthermia and intravesical chemotherapy has a beneficial prophylactic effect in patients with G3 superficial bladder cancer. Ablation of high-grade bladder tumors is feasible, achieving a complete response in about three quarters of the patients.
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MESH Headings
- Administration, Intravesical
- Aged
- Aged, 80 and over
- Antineoplastic Agents, Alkylating/administration & dosage
- Antineoplastic Agents, Alkylating/adverse effects
- Antineoplastic Agents, Alkylating/therapeutic use
- Carcinoma in Situ/drug therapy
- Carcinoma in Situ/pathology
- Carcinoma in Situ/therapy
- Carcinoma, Transitional Cell/drug therapy
- Carcinoma, Transitional Cell/pathology
- Carcinoma, Transitional Cell/surgery
- Carcinoma, Transitional Cell/therapy
- Combined Modality Therapy
- Cystectomy
- Cystoscopy
- Disease Progression
- Disease-Free Survival
- Female
- Follow-Up Studies
- Humans
- Hyperthermia, Induced/adverse effects
- Male
- Middle Aged
- Mitomycin/administration & dosage
- Mitomycin/adverse effects
- Mitomycin/therapeutic use
- Neoplasm Recurrence, Local/surgery
- Neoplasm Staging
- Urinary Bladder Neoplasms/drug therapy
- Urinary Bladder Neoplasms/pathology
- Urinary Bladder Neoplasms/surgery
- Urinary Bladder Neoplasms/therapy
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Affiliation(s)
- O N Gofrit
- Department of Urology, Hadassah University Hospital, Jerusalem, Israel
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Abstract
OBJECTIVES To report our experience with T1G3 bladder tumours over the last 10 years. PATIENTS AND METHODS We analysed the outcome of 74 consecutive patients treated for a T1G3 bladder cancer between 1991 and 2001. Fifty-seven patients (77%) were treated with transurethral resection (TUR) plus six weekly instillations of bacillus Calmette-Guérin (BCG) therapy. Ten patients (13.5%) with contraindications to BCG or with a small T1a tumour were treated with TUR plus mitomycin-C, and seven (9.5%) were treated with TUR alone because of their age. Patients treated with BCG had systematic biopsies taken at the end of the first course. Patients with residual tumour received a second course of six weekly instillations. Patients with negative biopsies received maintenance BCG therapy consisting of intravesical instillations each week for 3 weeks given 3, 6, 12, 18, 24, 30 and 36 months after the first course. RESULTS The median follow-up was 53 months. The overall recurrence rate was 46% and the overall progression rate 19%. The rate of delayed cystectomy was 8% and that of disease-specific survival 91%. In patients who received BCG therapy, the recurrence and progression rates were 42% and 23%, respectively. In this group the rate of disease-specific survival was 88%. CONCLUSION This study confirms that maintenance BCG therapy is an effective treatment for T1G3 bladder tumours, with an acceptable rate of bladder preservation.
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Affiliation(s)
- M Peyromaure
- Department of Urology, Cochin Hospital, Paris, France.
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Patard JJ, Rodriguez A, Lobel B. The current status of intravesical therapy for superficial bladder cancer. Curr Opin Urol 2003; 13:357-62. [PMID: 12917511 DOI: 10.1097/00042307-200309000-00002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW To analyse recent advances in intravesical instillation therapy for superficial bladder cancer. RECENT FINDINGS Although intravesical bacillus Calmette-Guérin has been used for many years in the treatment of superficial bladder cancer, its mechanism of action remains unclear, its poor tolerance remains a problem, the prediction of its efficacy has still to be validated, and its long-term effects on progression and survival are controversial. The exact timing and place of intravesical chemotherapy needs to be better defined, as well as the place of some new molecules. Finally, new approaches need to be explored for overcoming the limitations of the usual intravesical agents. SUMMARY No dramatic advances have been made in understanding the mechanisms of action of bacillus Calmette-Guérin during the past year. However, a careful dissection of this complex immunological pathway continues and immunological criteria are promising for predicting the response to bacillus Calmette-Guérin. Evidence has been accumulating to suggest that a dose reduction during the initial treatment remains effective and reduces side-effects. In addition, bacillus Calmette-Guérin maintenance therapy is useful for high-risk patients. However, long-term tolerance remains an important issue, and the optimal protocol has not yet been defined. On the other hand, it has been proved that intravesical chemotherapy, when administered early after transurethral resection, is effective in preventing frequent recurrences, whereas maintenance chemotherapy is ineffective. Finally, new approaches, including instillations of activated immune cells or targeted gene therapy, are being explored.
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Peyromaure M, Guerin F, Amsellem-Ouazana D, Saighi D, Debre B, Zerbib M. Intravesical bacillus Calmette-Guerin therapy for stage T1 grade 3 transitional cell carcinoma of the bladder: recurrence, progression and survival in a study of 57 patients. J Urol 2003; 169:2110-2. [PMID: 12771729 DOI: 10.1097/01.ju.0000066840.42991.4a] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Stage T1 grade 3 transitional cell carcinoma of the bladder is associated with a high risk of tumor recurrence and progression. We report our experience with stage T1 grade 3 bladder tumors treated with bacillus Calmette-Guerin (BCG) therapy in the last 10 years. MATERIALS AND METHODS We analyzed the outcome in 57 consecutive patients treated with intravesical BCG for stage T1 grade 3 bladder cancer between 1991 and 2001. After initial transurethral resection all patients received a 6-week course of BCG therapy consisting of 1 instillation weekly. All patients underwent systematic biopsies at the end of the first BCG course. Patients with negative biopsies received maintenance BCG therapy, consisting of intravesical instillations each week for 3 weeks given 3, 6, 12, 18, 24, 30 and 36 months after the first course. Patients with residual tumor received a second course of 6 weekly instillations. Time to tumor recurrence and progression, and the rate of patient survival were retrospectively analyzed. RESULTS Median followup was 53 months (range 9 to 110). Minimum followup was 2 years in 36 cases (63.2%) and 5 years in 28 (49.1%). After the first BCG course 50 patients (87.7%) had no residual disease, while 7 (12.3%) had residual tumor. The recurrence and progression rates were 42.1% and 22.8%, respectively. The rate of delayed cystectomy was 14%. The rate of disease specific survival was 87.7%. CONCLUSIONS Our study confirms that BCG therapy is effective conservative treatment for patients with stage T1 grade 3 bladder tumors.
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Chabalgoity JA, Dougan G, Mastroeni P, Aspinall RJ. Live bacteria as the basis for immunotherapies against cancer. Expert Rev Vaccines 2002; 1:495-505. [PMID: 12901588 DOI: 10.1586/14760584.1.4.495] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
For more than a century, bacteria and bacterial products have been used for the treatment of cancer. Starting from the practical observation of tumor regression in individuals with concomitant bacterial infection, the field has evolved into some standard clinical practices, such as the use of BCG for the treatment of superficial bladder cancer. However, in the last few years, new applications have started to emerge that may profoundly change the perspective of the field. BCG can be engineered to express cytokines to improve its efficacy. Bacteria such as Salmonella and Listeria can be attenuated by genetically-defined mutations and provide effective vehicles for DNA vaccines encoding tumor-associated antigens. Salmonella and nonpathogenic strains of Clostridium can selectively accumulate in tumors in vivo, providing attractive delivery systems to target immunomodulatory molecules and therapeutic agents to the tumor site. Many of these new developments have been attempted for prophylactic or therapeutic vaccination in several different experimental models of cancer and in many cases, results from clinical trials are now emerging. There is still some way to go before achieving products that could be in routine use, but the field has great promise for the development of more effective immunotherapies for several different cancers. In this paper, we will review the current state of such applications and highlight some of the directions that the field may take.
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Affiliation(s)
- José A Chabalgoity
- Department of Biochemistry, Instituto de Higiene, Facultad de Medicina, Montevideo, Uruguay.
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