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1.
Ann Oncol ; 30(12): 1992-2003, 2019 12 01.
Artículo en Inglés | MEDLINE | ID: mdl-31560068

RESUMEN

BACKGROUND: STAMPEDE has previously reported that the use of upfront docetaxel improved overall survival (OS) for metastatic hormone naïve prostate cancer patients starting long-term androgen deprivation therapy. We report on long-term outcomes stratified by metastatic burden for M1 patients. METHODS: We randomly allocated patients in 2 : 1 ratio to standard-of-care (SOC; control group) or SOC + docetaxel. Metastatic disease burden was categorised using retrospectively-collected baseline staging scans where available. Analysis used Cox regression models, adjusted for stratification factors, with emphasis on restricted mean survival time where hazards were non-proportional. RESULTS: Between 05 October 2005 and 31 March 2013, 1086 M1 patients were randomised to receive SOC (n = 724) or SOC + docetaxel (n = 362). Metastatic burden was assessable for 830/1086 (76%) patients; 362 (44%) had low and 468 (56%) high metastatic burden. Median follow-up was 78.2 months. There were 494 deaths on SOC (41% more than the previous report). There was good evidence of benefit of docetaxel over SOC on OS (HR = 0.81, 95% CI 0.69-0.95, P = 0.009) with no evidence of heterogeneity of docetaxel effect between metastatic burden sub-groups (interaction P = 0.827). Analysis of other outcomes found evidence of benefit for docetaxel over SOC in failure-free survival (HR = 0.66, 95% CI 0.57-0.76, P < 0.001) and progression-free survival (HR = 0.69, 95% CI 0.59-0.81, P < 0.001) with no evidence of heterogeneity of docetaxel effect between metastatic burden sub-groups (interaction P > 0.5 in each case). There was no evidence that docetaxel resulted in late toxicity compared with SOC: after 1 year, G3-5 toxicity was reported for 28% SOC and 27% docetaxel (in patients still on follow-up at 1 year without prior progression). CONCLUSIONS: The clinically significant benefit in survival for upfront docetaxel persists at longer follow-up, with no evidence that benefit differed by metastatic burden. We advocate that upfront docetaxel is considered for metastatic hormone naïve prostate cancer patients regardless of metastatic burden.


Asunto(s)
Antagonistas de Andrógenos/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Docetaxel/administración & dosificación , Neoplasias de la Próstata/tratamiento farmacológico , Anciano , Antagonistas de Andrógenos/efectos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Progresión de la Enfermedad , Humanos , Masculino , Persona de Mediana Edad , Metástasis de la Neoplasia , Supervivencia sin Progresión , Modelos de Riesgos Proporcionales , Neoplasias de la Próstata/genética , Neoplasias de la Próstata/patología , Estudios Retrospectivos
2.
Ann Oncol ; 29(5): 1235-1248, 2018 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-29529169

RESUMEN

Background: Adding abiraterone acetate with prednisolone (AAP) or docetaxel with prednisolone (DocP) to standard-of-care (SOC) each improved survival in systemic therapy for advanced or metastatic prostate cancer: evaluation of drug efficacy: a multi-arm multi-stage platform randomised controlled protocol recruiting patients with high-risk locally advanced or metastatic PCa starting long-term androgen deprivation therapy (ADT). The protocol provides the only direct, randomised comparative data of SOC + AAP versus SOC + DocP. Method: Recruitment to SOC + DocP and SOC + AAP overlapped November 2011 to March 2013. SOC was long-term ADT or, for most non-metastatic cases, ADT for ≥2 years and RT to the primary tumour. Stratified randomisation allocated pts 2 : 1 : 2 to SOC; SOC + docetaxel 75 mg/m2 3-weekly×6 + prednisolone 10 mg daily; or SOC + abiraterone acetate 1000 mg + prednisolone 5 mg daily. AAP duration depended on stage and intent to give radical RT. The primary outcome measure was death from any cause. Analyses used Cox proportional hazards and flexible parametric models, adjusted for stratification factors. This was not a formally powered comparison. A hazard ratio (HR) <1 favours SOC + AAP, and HR > 1 favours SOC + DocP. Results: A total of 566 consenting patients were contemporaneously randomised: 189 SOC + DocP and 377 SOC + AAP. The patients, balanced by allocated treatment were: 342 (60%) M1; 429 (76%) Gleason 8-10; 449 (79%) WHO performance status 0; median age 66 years and median PSA 56 ng/ml. With median follow-up 4 years, 149 deaths were reported. For overall survival, HR = 1.16 (95% CI 0.82-1.65); failure-free survival HR = 0.51 (95% CI 0.39-0.67); progression-free survival HR = 0.65 (95% CI 0.48-0.88); metastasis-free survival HR = 0.77 (95% CI 0.57-1.03); prostate cancer-specific survival HR = 1.02 (0.70-1.49); and symptomatic skeletal events HR = 0.83 (95% CI 0.55-1.25). In the safety population, the proportion reporting ≥1 grade 3, 4 or 5 adverse events ever was 36%, 13% and 1% SOC + DocP, and 40%, 7% and 1% SOC + AAP; prevalence 11% at 1 and 2 years on both arms. Relapse treatment patterns varied by arm. Conclusions: This direct, randomised comparative analysis of two new treatment standards for hormone-naïve prostate cancer showed no evidence of a difference in overall or prostate cancer-specific survival, nor in other important outcomes such as symptomatic skeletal events. Worst toxicity grade over entire time on trial was similar but comprised different toxicities in line with the known properties of the drugs. Trial registration: Clinicaltrials.gov: NCT00268476.


Asunto(s)
Acetato de Abiraterona/administración & dosificación , Antagonistas de Andrógenos/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Docetaxel/administración & dosificación , Neoplasias de la Próstata/tratamiento farmacológico , Acetato de Abiraterona/efectos adversos , Anciano , Antagonistas de Andrógenos/efectos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/normas , Supervivencia sin Enfermedad , Docetaxel/efectos adversos , Estudios de Seguimiento , Humanos , Estimación de Kaplan-Meier , Masculino , Metaanálisis en Red , Supervivencia sin Progresión , Antígeno Prostático Específico/sangre , Neoplasias de la Próstata/sangre , Neoplasias de la Próstata/mortalidad , Neoplasias de la Próstata/patología , Nivel de Atención
4.
Br J Cancer ; 110(1): 256-63, 2014 Jan 07.
Artículo en Inglés | MEDLINE | ID: mdl-24263066

RESUMEN

BACKGROUND: Patients with stage I testicular seminoma are typically diagnosed at a young age and treatment is associated with low relapse and mortality rates. The long-term risks of adjuvant radiotherapy in this patient group are therefore particularly relevant. METHODS: We identified patients and obtained treatment details from 12 cancer centres (11 United Kingdom, 1 Norway) and ascertained second cancers and mortality through national registries. Data from 2629 seminoma patients treated with radiotherapy between 1960 and 1992 were available, contributing 51,151 person-years of follow-up. RESULTS: Four hundred and sixty-eight second cancers (excluding non-melanoma skin cancers) were identified. The standardised incidence ratio (SIR) was 1.61 (95% confidence interval (CI): 1.47-1.76, P<0.0001). The SIR was 1.53 (95% CI: 1.39-1.68, P<0.0001) when the 32 second testicular cancers were also excluded. This increase was largely due to an excess risk to organs in the radiation field; for pelvic-abdominal sites the SIR was 1.62 (95% CI: 1.43-1.83), with no significant elevated risk of cancers in organs elsewhere. There was no overall increase in mortality with a standardised mortality ratio (SMR) of 1.06 (95% CI: 0.98-1.14), despite an increase in the cancer-specific mortality (excluding testicular cancer deaths) SMR of 1.46 (95% CI: 1.30-1.65, P<0.0001). CONCLUSION: The prognosis of stage I seminoma is excellent and it is important to avoid conferring long-term increased risk of iatrogenic disease such as radiation-associated second cancers.


Asunto(s)
Neoplasias Inducidas por Radiación/epidemiología , Neoplasias Inducidas por Radiación/etiología , Seminoma/radioterapia , Neoplasias Testiculares/epidemiología , Neoplasias Testiculares/radioterapia , Adulto , Estudios de Seguimiento , Humanos , Masculino , Estadificación de Neoplasias , Noruega/epidemiología , Radioterapia Adyuvante/efectos adversos , Seminoma/patología , Neoplasias Testiculares/patología , Reino Unido/epidemiología
5.
Ann Oncol ; 24(8): 2104-7, 2013 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-23592702

RESUMEN

BACKGROUND: Extended field radiotherapy is a standard of care for low volume stage II testicular seminoma. We hypothesized that neoadjuvant carboplatin might reduce the recurrence risk. PATIENTS AND METHODS: In a single-arm study, 51 patients were treated between May 1996 and November 2011 with a single cycle of carboplatin followed by radiotherapy. The radiation field was reduced from an extended abdomino-pelvic field to just the para-aortic region, and the radiation dose from 35 Gy to 30 Gy in 39 patients. RESULTS: After a median follow-up of 55 months (range 8-151 months) with 38 (74%) of the patients having been followed for >2 years, there have been no relapses (95% confidence limits of 5-year relapse-free survival of 93%-100%). Toxicity has been low with grade 3 toxicity limited to four patients with grade 3 haematological toxicity (with no clinical sequelae) and one patient with grade 3 nausea (during radiotherapy). No patients experienced grade 4 toxicity. CONCLUSIONS: The results of this pilot study suggest that a single cycle of neoadjuvant carboplatin before radiotherapy may reduce recurrence risk compared with radiotherapy alone and permit a smaller radiation field, and this approach is proposed for further investigation.


Asunto(s)
Antineoplásicos/uso terapéutico , Carboplatino/uso terapéutico , Seminoma/tratamiento farmacológico , Seminoma/radioterapia , Adolescente , Adulto , Anciano , Terapia Combinada , Supervivencia sin Enfermedad , Humanos , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante , Recurrencia Local de Neoplasia/tratamiento farmacológico , Recurrencia Local de Neoplasia/prevención & control , Recurrencia Local de Neoplasia/radioterapia , Estadificación de Neoplasias , Dosificación Radioterapéutica , Neoplasias Testiculares/tratamiento farmacológico , Neoplasias Testiculares/radioterapia , Adulto Joven
6.
J Hum Nutr Diet ; 25(3): 247-59, 2012 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-22515941

RESUMEN

BACKGROUND: Inflammatory responses to pelvic radiotherapy can result in severe changes to normal gastrointestinal function with potentially severe long-term effects. Reduced or modified fat diets may confer benefit. METHODS: This randomised controlled trial recruited patients with gynaecological, urological or lower gastrointestinal malignancy due to receive radical radiotherapy. Patients were randomised to a low fat (20% total energy from long chain triglycerides), modified fat (20% from long chain triglycerides and 20% from medium chain triglycerides) or normal fat diet (40% total energy from long chain triglycerides). The primary outcome was a difference in change in Inflammatory Bowel Disease Questionnaire--Bowel (IBDQ-B) score, from the start to end of radiotherapy. RESULTS: A total of 117 patients with pelvic tumours (48% urological; 32% gastrointestinal; 20% gynaecological), with mean (SD) age: 65 (11.0) years, male:female ratio: 79:38, were randomised. The mean (SE) fall in paired IBDQ-B score was -7.3 (0.9) points, indicating a worsening toxicity. Differences between groups were not significant: P = 0.914 (low versus modified fat), P = 0.793 (low versus normal fat) and P = 0.890 (modified versus normal fat). The difference in fat intake between low and normal fat groups was 29.5 g [1109 kJ (265 kcal)] amounting to 11% (of total energy intake) compared to the planned 20% differential. Full compliance with fat prescription was only 9% in the normal fat group compared to 93% in the low fat group. CONCLUSIONS: A low or modified fat diet during pelvic radiotherapy did not improve gastrointestinal symptom scores compared to a normal fat intake. An inadequate differential in fat intake between the groups may have confounded the results.


Asunto(s)
Dieta con Restricción de Grasas , Tracto Gastrointestinal/efectos de la radiación , Inflamación/dietoterapia , Neoplasias Pélvicas/radioterapia , Radioterapia/efectos adversos , Anciano , Femenino , Humanos , Inflamación/etiología , Masculino , Cooperación del Paciente , Neoplasias Pélvicas/complicaciones , Resultado del Tratamiento
7.
Lancet Oncol ; 16(3): e105, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25752561
8.
Br J Cancer ; 103(6): 918-24, 2010 Sep 07.
Artículo en Inglés | MEDLINE | ID: mdl-20736950

RESUMEN

BACKGROUND: The germline BRCA2 mutation is associated with increased prostate cancer (PrCa) risk. We have assessed survival in young PrCa cases with a germline mutation in BRCA2 and investigated loss of heterozygosity at BRCA2 in their tumours. METHODS: Two cohorts were compared: one was a group with young-onset PrCa, tested for germline BRCA2 mutations (6 of 263 cases had a germline BRAC2 mutation), and the second was a validation set consisting of a clinical set from Manchester of known BRCA2 mutuation carriers (15 cases) with PrCa. Survival data were compared with a control series of patients in a single clinic as determined by Kaplan-Meier estimates. Loss of heterozygosity was tested for in the DNA of tumour tissue of the young-onset group by typing four microsatellite markers that flanked the BRCA2 gene, followed by sequencing. RESULTS: Median survival of all PrCa cases with a germline BRCA2 mutation was shorter at 4.8 years than was survival in controls at 8.5 years (P=0.002). Loss of heterozygosity was found in the majority of tumours of BRCA2 mutation carriers. Multivariate analysis confirmed that the poorer survival of PrCa in BRCA2 mutation carriers is associated with the germline BRCA2 mutation per se. CONCLUSION: BRCA2 germline mutation is an independent prognostic factor for survival in PrCa. Such patients should not be managed with active surveillance as they have more aggressive disease.


Asunto(s)
Genes BRCA2 , Mutación de Línea Germinal , Neoplasias de la Próstata/genética , Adulto , Anciano , Humanos , Pérdida de Heterocigocidad , Masculino , Persona de Mediana Edad , Pronóstico , Análisis de Supervivencia
9.
Clin Oncol (R Coll Radiol) ; 32(3): 175-180, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-31711737

RESUMEN

Evidence is accumulating for seven and less fractions in localised prostate cancer, including one large randomised trial. However, there is much more evidence yet to come and changing practice in advance of this may be premature. We review the reasons to persist with moderate hypofractionation for prostate cancer radiotherapy, until the results of further phase III studies are known.


Asunto(s)
Neoplasias de la Próstata/radioterapia , Nivel de Atención , Humanos , Masculino , Hipofraccionamiento de la Dosis de Radiación
10.
Clin Radiol ; 64(4): 362-7, 2009 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19264179

RESUMEN

AIM: To determine the sensitivity of magnetic resonance imaging (MRI) in the detection of retroperitoneal lymph nodes in patients with testicular germ cell tumours (TGCT). METHODS AND MATERIALS: A prospective study of 52 patients (mean age 34 years, range 18-54 years) was performed. Imaging of the retroperitoneum was performed using multidetector computed tomography (CT) and 1.5 T MRI systems. The CT and MRI images were read independently by three observers. The number, size, and site of enlarged nodes (> or =10 mm maximum short axis diameter) were recorded. Retroperitoneal nodal detection on MRI was compared to CT. RESULTS: Twenty-two (42%) of the 52 patients had no retroperitoneal disease; in remaining 30 patients 51 enlarged nodes were identified. On a per patient basis readers 1, 2, and 3 identified nodal disease in 28 of 29, 29 of 30, and 24 of 30 patients, respectively, using MRI compared to CT. Thus for experienced radiologists (readers 1 and 2) MRI is comparable to CT for nodal detection (i.e., this study excludes MRI being inferior to CT with 80% power and 5% type 1 error). CONCLUSION: MRI offers an alternative method for staging the retroperitoneum in young patients being followed for TGCT and has the major advantage of avoiding exposure to ionizing radiation.


Asunto(s)
Imagen por Resonancia Magnética/normas , Neoplasias de Células Germinales y Embrionarias/secundario , Neoplasias Retroperitoneales/secundario , Neoplasias Testiculares , Tomografía Computarizada por Rayos X/normas , Adolescente , Adulto , Humanos , Ganglios Linfáticos/patología , Imagen por Resonancia Magnética/métodos , Masculino , Persona de Mediana Edad , Neoplasias de Células Germinales y Embrionarias/diagnóstico , Neoplasias de Células Germinales y Embrionarias/diagnóstico por imagen , Estudios Prospectivos , Reproducibilidad de los Resultados , Neoplasias Retroperitoneales/diagnóstico , Neoplasias Retroperitoneales/diagnóstico por imagen , Sensibilidad y Especificidad , Tomografía Computarizada por Rayos X/métodos , Adulto Joven
11.
Clin Oncol (R Coll Radiol) ; 21(1): 39-42, 2009 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-18993040

RESUMEN

AIMS: Magnetic resonance imaging (MRI) is an effective method for evaluating the spine in patients with a high risk of metastatic disease. The aim of this study was to compare MRI spine with radionuclide bone scan in detecting spinal metastases for staging prostate cancer patients. MATERIALS AND METHODS: A cohort of 99 patients with locally advanced prostate cancer at high risk of skeletal metastasis (prostate-specific antigen>10 ng/ml, composite Gleason score>or=8) or equivocal findings on bone scan were included in the retrospective study, and their MRI spine and bone scans were analysed. RESULTS: Ten patients were detected to have definite spinal metastasis by bone scan, whereas 12 patients had definite skeletal metastasis by MRI spine. Compared with the 'gold standard', derived from clinical and radiological follow-up, the sensitivities for radionuclide bone scan and that for MRI spine for detecting skeletal metastasis were 71.4 and 85.7%, respectively (P=0.023), whereas the specificities were 96.5 and 97.7%, respectively (P=0.95). Of the 34 individual metastatic lesions in the spine, 15 were concordantly positive on both scans, whereas five lesions were positive only by bone scan and 11 positive only by MRI. The addition of MRI spine in the staging for prostate cancer resulted in a change of stage and management plan in seven (7%) patients. CONCLUSION: MRI spine has comparable specificity and slightly better sensitivity than bone scan to detect spinal metastasis from prostate cancer.


Asunto(s)
Imagen por Resonancia Magnética , Neoplasias de la Próstata/patología , Neoplasias de la Columna Vertebral/diagnóstico , Neoplasias de la Columna Vertebral/secundario , Columna Vertebral/patología , Adulto , Anciano , Anciano de 80 o más Años , Humanos , Masculino , Persona de Mediana Edad , Cintigrafía , Sensibilidad y Especificidad , Neoplasias de la Columna Vertebral/diagnóstico por imagen , Columna Vertebral/diagnóstico por imagen
12.
Clin Oncol (R Coll Radiol) ; 31(6): 374-384, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30902559

RESUMEN

AIMS: Pelvic lymph node (PLN) radiotherapy for high-risk prostate cancer is limited by late gastrointestinal toxicity. Application of rectal and bowel constraints may reduce risks of side-effects. We evaluated associations between intensity-modulated radiotherapy (IMRT) dose-volume data and long-term gastrointestinal toxicity. MATERIALS AND METHODS: Data from a single-centre dose-escalation trial of PLN-IMRT were analysed, including conventionally fractionated (CFRT) and hypofractionated (HFRT) radiotherapy schedules. Associations between volumes of rectum and bowel receiving specified doses and clinician- and patient-reported toxicity outcomes were investigated independently. A metric, δ median (δM), was defined as the difference in the medians of a volume between groups with and without toxicity at a specified dose and was used to test for statistically significant differences. RESULTS: Constraints were respected in most patients and, when exceeded, led to higher rates of gastrointestinal toxicity. Biologically relevant associations between rectum dose-points and toxicity were more numerous with both mild and moderate toxicity thresholds, but statistical significance was limited after correction for false discovery rate. Rectal V50Gy (CFRT) associated with grade 2+ bleeding; bowel V43Gy and V47 (HFRT/4 days/week schedule) associated with patient-reported loose stools and diarrhoea, respectively. Further investigation showed that CFRT patients with rectal bleeding had a mean rectal V50Gy above the treatment planning constraint. CONCLUSIONS: When dose-volume parameters are kept below tight constraints, toxicity is low. Residual dosimetry loses much of its predictive power for gastrointestinal toxicity in the setting of PLN-IMRT for prostate cancer. We have benchmarked dose-volume constraints for safely delivering PLN-IMRT using CFRT or HFRT.


Asunto(s)
Intestino Grueso/efectos de la radiación , Metástasis Linfática/radioterapia , Neoplasias de la Próstata/radioterapia , Radioterapia de Intensidad Modulada/efectos adversos , Recto/efectos de la radiación , Anciano , Anciano de 80 o más Años , Humanos , Ganglios Linfáticos/patología , Masculino , Persona de Mediana Edad , Pelvis/patología , Radiometría
13.
Clin Oncol (R Coll Radiol) ; 31(9): 600-610, 2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-31178346

RESUMEN

AIMS: The CHHiP (Conventional or Hypofractionated High-dose Intensity Modulated Radiotherapy In Prostate Cancer; CRUK/06/016) trial investigated hypofractionated radiotherapy for localised prostate cancer. Forward- (FP) or inverse-planned (IP) intensity-modulated techniques were permitted. Dose-volume histogram and toxicity data were compared to explore the effects of planning method. MATERIALS AND METHODS: In total, 337 participants with intermediate-risk disease and prospectively collected toxicity data were included. Patients were matched on prostate and rectum/bladder volumes and on radiotherapy dose for toxicity comparisons. The primary outcome was grade 2 or higher Radiation Therapy Oncology Group (RTOG) bowel or bladder toxicity at 2 years. RESULTS: IP patients had smaller volumes of rectum irradiated to 50-70 Gy (P < 0.001); FP patients had smaller volumes of bladder irradiated to 74 Gy (P = 0.001). Acute grade 2 + bowel toxicity was worse with FP (27/53 [52%]; 11/53 [21%] IP; P = 0.0002); with no significant differences in acute urinary toxicity. At 2 years, RTOG grade 2 + bowel toxicity rates were FP 0/53 and IP 2/53 and RTOG grade 2 + bladder rates were FP 0/54 and IP 1/57. CONCLUSIONS: Significant differences were found between dose-volume histograms from FP and IP methods. IP may result in small reductions in acute bowel toxicity but both techniques were associated with low rates of late radiotherapy side-effects.


Asunto(s)
Hipofraccionamiento de la Dosis de Radiación , Radiometría/métodos , Radioterapia de Intensidad Modulada/métodos , Anciano , Humanos , Masculino , Persona de Mediana Edad
14.
Radiother Oncol ; 141: 181-187, 2019 12.
Artículo en Inglés | MEDLINE | ID: mdl-31493904

RESUMEN

BACKGROUND AND PURPOSE: To assess the diagnostic accuracy and inter-observer agreement of T2-weighted (T2W) and diffusion-weighted (DW) magnetic resonance imaging (MRI) for mapping intra-prostatic tumour lesions (IPLs) for the purpose of focal dose-escalation in prostate cancer radiotherapy. MATERIALS AND METHODS: Twenty-six men selected for radical treatment with radiotherapy were recruited prospectively and underwent pre-treatment T2W+DW-MRI and 5 mm spaced transperineal template-guided mapping prostate biopsies (TTMPB). A 'traffic-light' system was used to score both data sets. Radiologically suspicious lesions measuring ≥0.5 cm3 were classified as red; suspicious lesions 0.2-0.5 cm3 or larger lesions equivocal for tumour were classified as amber. The histopathology assessment combined pathological grade and tumour length on biopsy (red = ≥4 mm primary Gleason grade 4/5 or ≥6 mm primary Gleason grade 3). Two radiologists assessed the MRI data and inter-observer agreement was measured with Cohens' Kappa co-efficient. RESULTS: Twenty-five of 26 men had red image-defined IPLs by both readers, 24 had red pathology-defined lesions. There was a good correlation between lesions ≥0.5 cm3 classified "red" on imaging and "red" histopathology in biopsies (Reader 1: r = 0.61, p < 0.0001, Reader 2: r = 0.44, p = 0.03). Diagnostic accuracy for both readers for red image-defined lesions was sensitivity 85-86%, specificity 93-98%, positive predictive value (PPV) 79-92% and negative predictive value (NPV) 96%. Inter-observer agreement was good (Cohen's Kappa 0.61). CONCLUSIONS: MRI is accurate for mapping clinically significant prostate cancer; diffusion-restricted lesions ≥0.5 cm3 can be confidently identified for radiation dose boosting.


Asunto(s)
Imagen de Difusión por Resonancia Magnética/métodos , Biopsia Guiada por Imagen/métodos , Neoplasias de la Próstata/radioterapia , Radioterapia de Intensidad Modulada/métodos , Anciano , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Neoplasias de la Próstata/diagnóstico por imagen , Neoplasias de la Próstata/patología , Dosificación Radioterapéutica
15.
Br J Cancer ; 98(12): 1894-902, 2008 Jun 17.
Artículo en Inglés | MEDLINE | ID: mdl-18542063

RESUMEN

Testicular germ cell tumours (TGCTs) are the most common cause of cancer in men between the ages of 15 and 40 years, and, overall, the majority of patients should expect to be cured. The European Germ Cell Cancer Consensus Group has provided clear guidelines for the primary treatment of both seminoma and nonseminomatous germ cell tumours. There is, however, no international consensus on how best to follow patients after their initial management. This must promptly and reliably identify relapses without causing further harm. The standardising of follow-up would result in optimising risk-benefit ratios for individual patients, while ensuring economic use of resources. We have identified the seven common scenarios in managing seminomas and nonseminomas of the various stages and discuss the pertinent issues around relapse and follow-up. We review the available literature and present our comprehensive TGCT follow-up guidelines. Our protocols provide a pragmatic, easily accessible user-friendly basis for other centres to use or to adapt to suit their needs. Furthermore, this should enable future trials to address specific issues around follow-up giving meaningful and useful results.


Asunto(s)
Medicina Basada en la Evidencia , Neoplasias Testiculares/terapia , Adolescente , Adulto , Terapia Combinada , Estudios de Seguimiento , Humanos , Masculino , Guías de Práctica Clínica como Asunto , Recurrencia , Neoplasias Testiculares/fisiopatología , Neoplasias Testiculares/psicología
16.
Clin Oncol (R Coll Radiol) ; 20(1): 15-21, 2008 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-18054471

RESUMEN

AIMS: To compare the radiotherapy planning techniques from two multicentre randomised external beam radiotherapy trials in the UK of conformal radiotherapy vs intensity-modulated radiotherapy (IMRT). MATERIALS AND METHODS: Sixteen sequential patients with histologically confirmed localised prostate cancer treated in the conventional or hypofractionated IMRT trial (CHHiP) were planned using both the CHHiP and Medical Research Council RT-01 planning protocols to 74 Gy in 37 daily fractions. The CHHiP plan used a single phase simple forward planned three-field IMRT plan for easy multicentre adoption. The RT-01 plan used two phases: three-field conformal radiotherapy plan to 64 Gy followed by a six-field boost of 10 Gy. After coverage of the planning target volumes according to the respective trial protocols, the dose to the rectum and bladder was assessed for the two planning techniques. RESULTS: There was acceptable planning target volume coverage by both the CHHiP and RT-01 plans. All CHHiP plans produced lower mean irradiated rectal volumes at all measured dose levels compared with the RT-01 plans, particularly for irradiated rectal volumes at 50 and 70 Gy (P<0.05). In the cases when a CHHiP plan failed to meet its own trial dose constraints, the volumes of irradiated rectum were less than if an RT-01 planning technique had been used. The CHHiP plans gave lower mean irradiated bladder volumes at both 50 and 60 Gy, but higher volumes at 74 Gy. These differences in irradiated bladder volumes were significant at the 60 and 74 Gy dose levels (P<0.05) in favour of the CHHiP and RT-01 plans, respectively. CONCLUSION: The forward planned CHHiP IMRT planning solution gives more favourable rectal sparing than the RT-01 plan. This is important to limit any potential increase in late rectal toxicity for prostate cancer patients treated with high-dose conventional or hypofractionated schedules.


Asunto(s)
Neoplasias de la Próstata/radioterapia , Anciano , Fraccionamiento de la Dosis de Radiación , Humanos , Masculino , Persona de Mediana Edad , Neoplasias de la Próstata/patología , Dosis de Radiación , Planificación de la Radioterapia Asistida por Computador , Radioterapia de Intensidad Modulada , Recto/efectos de la radiación , Vejiga Urinaria/efectos de la radiación
17.
Clin Oncol (R Coll Radiol) ; 20(8): 582-90, 2008 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-18565744

RESUMEN

AIMS: The MRC RT01 trial used conformal radiotherapy to the prostate, a method that reduces the volume of normal tissue treated by 40-50%. Because of the risk of geographical miss, the trial used portal imaging to examine whether treatment delivery was within the required accuracy. MATERIAL AND METHODS: In total, 843 patients were randomly assigned to receive 64 Gy in 32 fractions over 6.5 weeks or 74 Gy in 37 fractions over 7.5 weeks. Field displacements and corrections were recorded for all imaged fractions. Displacement trends and their association with time, disease and treatment set-up characteristics were examined using univariate and multivariate analyses. A Radiographer Trial Implementation Group (RTIG) was set up to inform the quality assurance process and to promote the development of best practice. RESULTS: Treatment isocentre positioning was within 5 mm in every direction on 6238 (83%) of the 7535 fractions imaged. In total, 532 (81%) of 695 included patients had at least one > or = 3 mm displacement and 415 (63%) had at least one > or = 5 mm displacement. Univariate, multivariate and stepwise models of > or =5 mm displacements showed an increased likelihood of displacement in weeks 1 and 2 with low melting point alloy (LMPA) blocks compared with multileaf collimators, film verification compared with electronic portal imaging (EPI) and increased number of fractions imaged. Except for LMPA, this was also seen for > or = 5 mm displacements in weeks 3-6. CONCLUSIONS: Accurate conformal treatment was delivered. The use of EPI was associated with increased reported accuracy. The RTIG was a crucial part of the quality assurance process.


Asunto(s)
Adenocarcinoma/radioterapia , Neoplasias de la Próstata/radioterapia , Radioterapia Conformacional/métodos , Humanos , Modelos Logísticos , Masculino , Garantía de la Calidad de Atención de Salud , Reproducibilidad de los Resultados
18.
Clin Oncol (R Coll Radiol) ; 20(4): 288-92, 2008 May.
Artículo en Inglés | MEDLINE | ID: mdl-18339525

RESUMEN

This prospective randomised controlled study of 40 patients could not show a statistically significant advantage with 6 months of pentoxifylline compared with standard measures for late radiation-induced rectal bleeding. However, a modest benefit cannot be excluded and larger randomised placebo-controlled trials with longer durations of pentoxifylline treatment may be justified.


Asunto(s)
Pentoxifilina/uso terapéutico , Proctitis/tratamiento farmacológico , Traumatismos por Radiación/terapia , Hemorragia Gastrointestinal/etiología , Hemorragia Gastrointestinal/terapia , Humanos , Inhibidores de Agregación Plaquetaria/uso terapéutico , Proctitis/etiología
19.
Clin Oncol (R Coll Radiol) ; 30(6): 334-345, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29459102

RESUMEN

AIMS: To identify symptom clusters and predisposing factors associated with long-term symptoms and health-related quality of life after radiotherapy in men with prostate cancer. MATERIALS AND METHODS: Patient-reported outcomes (PROs) data from the Medical Research Council RT01 radiotherapy with neoadjuvant androgen deprivation therapy trial of 843 patients were used. PROs were collected over 5 years with the University of California, Los Angeles Prostate Cancer Index (UCLA-PCI) and the 36 item Short-Form Health Survey (SF-36). Symptom clusters were explored using hierarchical cluster analysis. The association of treatment dose, baseline patient characteristics and early symptom clusters with the change in severity of PROs over 3 years was investigated with multivariate linear mixed effects models. RESULTS: Seven symptom clusters of three or more symptoms were identified. The clusters were stable over time. The longitudinal profiles of symptom clusters showed the onset of acute symptoms during treatment for all symptom clusters and significant recovery by 6 months. Some clusters, such as physical health and sexual function, were adversely affected more than others by androgen deprivation therapy, and were less likely to return to pretreatment levels over time. Older age was significantly associated with decreased long-term physical function, physical health and sexual function (P < 0.001). Both baseline and acute symptom clusters were significant antecedents for impaired function and health-related quality of life at 3 years. CONCLUSIONS: Men with poorer physical function and health before or during treatment were more likely to report poorer PROs at year 3. Early assessment using PROs and lifestyle interventions should be used to identify those with higher needs and provide targeted rehabilitation and symptom management.


Asunto(s)
Neoplasias de la Próstata/radioterapia , Calidad de Vida/psicología , Anciano , Envejecimiento , Humanos , Estudios Longitudinales , Masculino , Neoplasias de la Próstata/patología
20.
Clin Oncol (R Coll Radiol) ; 19(2): 135-42, 2007 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-17355110

RESUMEN

AIMS: With a life expectancy similar to the general population, greater numbers of patients with Down's syndrome are being diagnosed with testicular cancer. Learning difficulties and medical co-morbidity are common in this patient population and may lead to non-standard oncological treatment. We aimed to identify and discuss management challenges in the treatment of these patients with chemotherapy and radiotherapy and report their clinical outcome. MATERIALS AND METHODS: The Royal Marsden Hospital urology database was searched from 1982 to 2005 to identify all cases of patients with Down's syndrome and histologically confirmed testicular cancer who were referred for consideration of chemotherapy or radiotherapy. RESULTS: Nine patients were identified, of whom eight received chemotherapy or radiotherapy. Two patients had bilateral tumours and four had crypto-orchidism. At the time of diagnosis, the patients were 21-50 years of age. Of the 11 tumours identified, nine were seminomas and two were malignant teratoma undifferentiated. Five patients presented with stage I disease, of whom three received carboplatin and one received para-aortic radiotherapy as adjuvant treatment. Three patients presented with stage II disease, of whom two were treated with carboplatin and one received combination chemotherapy followed by radiotherapy. One patient with stage IV disease was treated with carboplatin. Five of nine patients relapsed within 30 months, of whom three were successfully salvaged with radiotherapy and one with combination chemotherapy. CONCLUSION: After standard and non-standard therapy for seminoma, the relapse rate for patients in our cohort was high. Since relapsed disease is much more difficult to manage with combination chemotherapy on account of respiratory, cardiac and renal co-morbidity, adequate initial treatment is advised. Consideration of psycho-social issues and the multiple treatment strategies available is vital in delivering optimal care to patients with Down's syndrome and testicular cancer.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Síndrome de Down/terapia , Neoplasias Testiculares/terapia , Adulto , Comorbilidad , Criptorquidismo , Síndrome de Down/complicaciones , Síndrome de Down/tratamiento farmacológico , Síndrome de Down/radioterapia , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Seminoma/complicaciones , Seminoma/diagnóstico , Seminoma/terapia , Teratoma/complicaciones , Teratoma/diagnóstico , Teratoma/terapia , Neoplasias Testiculares/complicaciones , Neoplasias Testiculares/tratamiento farmacológico , Neoplasias Testiculares/radioterapia
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