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1.
Support Care Cancer ; 26(12): 4031-4038, 2018 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29858690

RESUMEN

PURPOSE: This study aimed to evaluate the prevalence of glucocorticoid-induced adrenal insufficiency in a cohort of patients with brain and skull base tumours and to identify factors which may predict its occurrence. METHODS: Patients with brain or skull base tumours attending for a short synacthen test (SST) (adrenocorticotropin hormone (ACTH) stimulation test) at a single institution over a 3-year period were retrospectively identified. Baseline demographics and dexamethasone exposure were examined. Only patients with dexamethasone exposure were included in the final analysis looking at the primary end point of SST failure. Fisher's exact test, Student's t test, Mann-Whitney test and the Kendall's tau-b test were used to evaluate the influence of age, gender, diagnosis and mean pituitary radiation dose on the primary endpoint. Receiver operating characteristic (ROC) curves were generated to explore the impact of duration and total exposure to dexamethasone on likelihood of SST failure. RESULTS: Thirty-one of 51 patients with previous dexamethasone exposure failed their first SST (61%). No significant relationship was demonstrated between age, gender, diagnosis or mean pituitary radiation dose and SST failure. Duration of and total exposure to dexamethasone were significantly associated with SST failure (p = 0.001 and p = 0.007, respectively). ROC curves generated values of 78 days and 171 mg days to give a sensitivity of 94 and 97%, respectively, to detect SST failure. CONCLUSIONS: Duration of dexamethasone use and total exposure predict for adrenal insufficiency in patients with brain and skull base tumours. Values derived from this study may be useful to identify patients at higher risk of adrenal suppression who require empirical hydrocortisone pending formal testing of the hypothalamic-pituitary-adrenal axis.


Asunto(s)
Insuficiencia Suprarrenal/inducido químicamente , Antiinflamatorios/efectos adversos , Neoplasias Encefálicas/diagnóstico , Dexametasona/efectos adversos , Calidad de Vida/psicología , Neoplasias de la Base del Cráneo/diagnóstico , Adolescente , Adulto , Anciano , Antiinflamatorios/farmacología , Dexametasona/farmacología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Adulto Joven
2.
Phytopathology ; 105(9): 1198-205, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25871860

RESUMEN

Potato late blight, caused by the oomycete phytopathogen Phytophthora infestans, is a devastating disease found in potato-growing regions worldwide. Long-term management strategies to control late blight include the incorporation of host resistance to predominant strains. However, due to rapid genetic changes within pathogen populations, rapid and recurring identification and integration of novel host resistance traits is necessary. Wild relatives of potato offer a rich source of desirable traits, including late blight resistance, but screening methods can be time intensive. We tested the ability of taxonomy, ploidy, crossing group, breeding system, and geography to predict the presence of foliar and tuber late blight resistance in wild Solanum spp. Significant variation for resistance to both tuber and foliar late blight was found within and among species but there was no discernable predictive power based on taxonomic series, clade, ploidy, breeding system, elevation, or geographic location. We observed a moderate but significant correlation between tuber and foliar resistance within species. Although previously uncharacterized sources of both foliar and tuber resistance were identified, our study does not support an assumption that taxonomic or geographic data can be used to predict sources of late blight resistance in wild Solanum spp.


Asunto(s)
Resistencia a la Enfermedad , Phytophthora/fisiología , Enfermedades de las Plantas/inmunología , Hojas de la Planta/inmunología , Tubérculos de la Planta/inmunología , Solanum/inmunología , Cruzamiento , Geografía , Enfermedades de las Plantas/microbiología , Hojas de la Planta/clasificación , Hojas de la Planta/genética , Tubérculos de la Planta/clasificación , Tubérculos de la Planta/genética , Plastidios/genética , Ploidias , Solanum/clasificación , Solanum/genética , Solanum tuberosum/clasificación , Solanum tuberosum/genética , Solanum tuberosum/inmunología , Especificidad de la Especie
3.
Br J Cancer ; 107(8): 1257-67, 2012 Oct 09.
Artículo en Inglés | MEDLINE | ID: mdl-23047592

RESUMEN

BACKGROUND: The National Epirubicin Adjuvant Trial (NEAT) and BR9601 trials tested the benefit of epirubicin when added to cyclophosphamide, methotrexate and 5-fluorouracil (E-CMF) compared with standard CMF in adjuvant chemotherapy for women with early breast cancer. This report details longer follow-up with interesting additional time-dependent analyses. METHODS: National Epirubicin Adjuvant Trial used epirubicin (E) 3-weekly for four cycles followed by classical (c) CMF for four cycles (E-CMF) compared with cCMF for six cycles. BR9601 used E 3-weekly for four cycles followed by CMF 3-weekly for four cycles, compared with CMF 3-weekly for eight cycles. RESULTS: In all, 2391 eligible patients were randomised and with a median 7.4-year follow-up, E-CMF confirmed a significant benefit over CMF in both relapse-free survival (RFS) (78% vs 71% 5 years RFS, respectively, hazard ratio (HR)=0.75 (95% CI: 0.65-0.86), P<0.0001) and overall survival (OS) (84% vs 78% 5 years OS, respectively, HR=0.76 (95% CI: 0.65-0.89), P=0.0007). Interaction of treatment effect and prognostic factors was demonstrated for duplication of chromosome 17 centromeric enumeration (Ch17CEP) as previously reported. Poor prognostic factors at diagnosis (ER and PR negative and HER2 positive) showed time-dependent annual hazard rates for RFS and OS. In univariate analysis, these factors demonstrated more favourable HRs for RFS after 5 years. Treatment effects also suggested a differential benefit for E-CMF within the first 5 years for poor prognosis tumours. CONCLUSION: Longer follow-up has confirmed E-CMF as significantly superior to CMF for all patients. Ch17CEP duplication was the only biomarker that demonstrated significant treatment interaction. Standard poor prognostic factors at diagnosis were time-dependent, and after 5 years disease-free, poor prognosis patients demonstrated favourable HRs for survival.


Asunto(s)
Antibióticos Antineoplásicos/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Neoplasias de la Mama/tratamiento farmacológico , Epirrubicina/administración & dosificación , Cumplimiento de la Medicación , Anciano , Neoplasias de la Mama/patología , Quimioterapia Adyuvante , Ciclofosfamida/administración & dosificación , Femenino , Fluorouracilo/administración & dosificación , Estudios de Seguimiento , Humanos , Metotrexato/administración & dosificación , Persona de Mediana Edad
4.
Phytopathology ; 101(9): 1074-80, 2011 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-21834726

RESUMEN

A major justification for taxonomic research is its assumed ability to predict the presence of traits in a group for which the trait has been observed in a representative subset of the group. Similarly, populations in similar environments are expected to be more alike than populations in divergent environments. Consequently, it is logical to assume that taxonomic relationships and biogeographical data have the power to predict the distribution of disease resistance phenotypes among plant species. The objective of this study was to test predictivity in a group of widely distributed wild potato species, based on hypotheses that closely related organisms (taxonomy) or organisms from similar environments (biogeography) share resistance to a simply inherited trait (Potato virus Y [PVY]). We found that wild potato species with an endosperm balance number (EBN) of 1 (a measure of cross compatibility) shared resistances to PVY more than species with different EBN values. However, a large amount of variation was found for resistance to PVY among and within species. We also found that populations from low elevations were more resistant than those from high elevations. Because PVY is vectored by aphids, we speculate that the distribution of aphids may determine the level of selection pressure for PVY resistance.


Asunto(s)
Enfermedades de las Plantas/virología , Inmunidad de la Planta/fisiología , Potyvirus/fisiología , Solanum tuberosum/clasificación , Solanum tuberosum/genética , Altitud , Animales , Áfidos/virología , Endospermo/metabolismo , Ambiente , Variación Genética , Insectos Vectores/virología , Fenotipo , Filogeografía , Enfermedades de las Plantas/inmunología , Ploidias , Potyvirus/inmunología , Sitios de Carácter Cuantitativo , Selección Genética , Solanum tuberosum/inmunología , Solanum tuberosum/virología , Especificidad de la Especie
5.
Sarcoma ; 2011: 538085, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-22190864

RESUMEN

Background. This study aimed to investigate prognostic factors for patients with myxoid/round-cell liposarcoma (MRCLS), in particular the significance of the round cell component, and to identify metastatic patterns as well as possibly suggest a suitable strategy for followup. Methods. Clinical, morphologic, and follow-up data from 160 patients with MRCLS was reviewed and statistically analysed. Results. Of 130 tumours with the round cell component evaluated, 61 had no round cell component, 27 had <5% round cell component, and 42 had >5%. All patients underwent surgical excision, 15 requiring amputation. 107 patients received adjuvant radiotherapy. Local recurrence occurred in 19 patients (12%), predominantly in patients with marginal or intralesional margins and a round cell component. Overall disease specific survival was 75% at 5 years and 56% at 10 years and was related to the proportion of round cell component. Of 52 patients who developed metastases, 38 (73%) had purely extrapulmonary metastases. We could not identify any factors predicting the site of metastases developing. Conclusions. The occurrence of any round cell component is the most important adverse prognostic factor for patients with MRCLS; patients with >5% round cell component are at higher risk of local recurrence, metastasis and tumour-related death and should be considered for adjuvant radiotherapy and possibly chemotherapy. The best method of monitoring extrapulmonary metastases remains to be established.

6.
Eur Spine J ; 19(7): 1189-94, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20076978

RESUMEN

To investigate the outcome of our management of patients with giant cell tumour of the sacrum and draw lessons from this. A retrospective review of medical records and scans for all patients treated at our unit over the past 20 years with a giant cell tumour of the sacrum. Of the 517 patients treated at our unit for giant cell tumour over the past 20 years, only 9 (1.7%) had a giant cell tumour in the sacrum. Six were female, three male with a mean age of 34 (range 15-52). All, but two tumours involved the entire sacrum and there was only one purely distal to S3. The mean size was 10 cm and the most common symptom was back or buttock pain. Five had abnormal neurology at diagnosis, but only one presented with cauda equina syndrome. The first four patients were treated by curettage alone, but two patients had intraoperative cardiac arrests and although both survived all subsequent curettages were preceded by embolisation of the feeding vessels. Of the seven patients who had curettage, three developed local recurrence, but all were controlled with a combination of further embolisation, surgery or radiotherapy. One patient elected for treatment with radiotherapy and another had excision of the tumour distal to S3. All the patients are alive and only two patients have worse neurology than at presentation, one being impotent and one with stress incontinence. Three patients required spinopelvic fusion for sacral collapse. All patients are mobile and active at a follow-up between 2 and 21 years. Giant cell tumour of the sacrum can be controlled with conservative surgery rather than subtotal sacrectomy. The excision of small distal tumours is the preferred option, but for larger and more extensive tumours conservative management may well avoid morbidity whilst still controlling the tumour. Embolisation and curettage are the preferred first option with radiotherapy as a possible adjunct. Spinopelvic fusion may be needed when the sacrum collapses.


Asunto(s)
Neoplasias Óseas/cirugía , Técnicas de Apoyo para la Decisión , Tumor Óseo de Células Gigantes/cirugía , Sacro/cirugía , Adolescente , Adulto , Neoplasias Óseas/patología , Neoplasias Óseas/radioterapia , Embolización Terapéutica , Femenino , Tumor Óseo de Células Gigantes/patología , Tumor Óseo de Células Gigantes/radioterapia , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Sacro/patología , Resultado del Tratamiento
7.
J Econ Entomol ; 102(1): 422-31, 2009 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19253664

RESUMEN

Wild relatives of potato offer a tremendous germplasm resource for breeders. Because the germplasm base of potato is so broad and diverse, we have undertaken a series of studies to determine whether we can predict the distribution of valuable genes in wild Solanum species based on taxonomic or biogeographic data. This is the third study in the series. Resistance to defoliation by Colorado potato beetle, Leptinotarsa decemlineata Say, larvae was evaluated in 156 accessions of 41 wild Solanum species. The highest frequencies of resistant accessions were found in diploid species with an endosperm balance number of 1. In contrast to previous studies on resistance to foliar fungal pathogens, there was little variability in defoliation scores among plants within an accession and among accessions within a species, at least for the most resistant species. There was no strong association of Colorado potato beetle resistance in wild potato species to biogeographic data. Resistance was confirmed in species previously characterized by high levels of glycoalkaloids or dense glandular trichomes. However, we have identified additional species with resistance to the Colorado potato beetle. Mechanisms of resistance are being studied in these species and attempts will be made to introgress them into the cultivated potato.


Asunto(s)
Escarabajos/fisiología , Interacciones Huésped-Parásitos , Solanum/parasitología , Américas , Animales , Ambiente , Geografía , Fenotipo , Ploidias , Solanum/clasificación , Solanum/genética , Solanum/fisiología , Especificidad de la Especie
8.
Emerg Med J ; 26(7): 497-500, 2009 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-19546270

RESUMEN

Pandemic influenza remains a potential major threat to global public health. It is essential for emergency departments to be involved in planning for the management of such a major event. It is also important for emergency departments to be clear on their internal arrangements for staff and for patient care. This paper outlines 10 suggestions for UK emergency departments based on the recent experience of emergency departments in Hong Kong and elsewhere.


Asunto(s)
Brotes de Enfermedades , Servicio de Urgencia en Hospital/organización & administración , Gripe Humana/prevención & control , Comunicación , Ética Médica , Humanos , Control de Infecciones/organización & administración , Gripe Humana/epidemiología , Capacitación en Servicio/organización & administración , Máscaras/provisión & distribución , Personal de Hospital/educación , Rol Profesional , Ropa de Protección/provisión & distribución
9.
Br J Cancer ; 99(8): 1226-31, 2008 Oct 21.
Artículo en Inglés | MEDLINE | ID: mdl-18797468

RESUMEN

The NEAT trial reported considerable benefit for ECMF (epirubicin followed by cyclophosphamide, methotrexate and 5-fluorouracil) of 28% for relapse-free survival (RFS) and 30% for overall survival (OS), when compared with classical CMF in early breast cancer. To assess tolerability, toxicity, dose intensity and quality of life (QoL) analyses were undertaken. All 2021 eligible patients had common toxicity criteria (CTC), delivered chemotherapy and supportive treatments details and long-term morbidities recorded. The QoL substudy used multiple validated measures. ECMF produced low CTC scores, although higher than CMF for nausea, vomiting, alopecia, constipation, stomatitis (P<0.001), infection (P=0.001) and fatigue (P=0.03). Supportive treatments required, however, were similar across randomised treatments. On-treatment deaths were more common with CMF (13) than ECMF(5). Optimal course-delivered dose intensity (CDDI > or =85%) was received more often by ECMF patients (83 vs 76%: P=0.0002), and was associated with better RFS (P=0.0006). QoL over 2 years was equivalent across treatments, despite minimally worse side effects for ECMF during treatment. ECMF benefit spanned all levels of toxicity, CDDI and QoL. There are no reported acute myeloid leukaemias or cardiac dysfunctions. ECMF is tolerable, deliverable, and significantly more effective than CMF, with no serious long-term toxicity or QoL detriment.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Neoplasias de la Mama/tratamiento farmacológico , Epirrubicina/administración & dosificación , Epirrubicina/efectos adversos , Calidad de Vida , Neoplasias de la Mama/mortalidad , Cisplatino/administración & dosificación , Supervivencia sin Enfermedad , Relación Dosis-Respuesta a Droga , Femenino , Fluorouracilo/administración & dosificación , Humanos , Estimación de Kaplan-Meier , Metotrexato/administración & dosificación
10.
Phytopathology ; 98(6): 680-7, 2008 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-18944292

RESUMEN

Host plant resistance offers an attractive method of control for early blight (caused by the foliar fungus Alternaria solani), a widespread disease that appears annually in potato crops worldwide. We tested the assumed ability of taxonomy to predict the presence of early blight resistance genes in wild Solanum species for which resistance was observed in related species. We also tested associations to ploidy, crossing group, breeding system, and geography. As in a prior study of Sclerotinia sclerotiorum (white mold) resistance, tremendous variation for resistance to early blight was found to occur within and among species. There was no discernable relationship between the distribution of resistant phenotypes and taxonomic series (based on an intuitive interpretation of morphological data), clade (based on a cladistic analysis of plastid DNA data), ploidy, breeding system, geographic distance, or climate parameters. Species and individual accessions with high proportions of early blight resistant plants were identified, but high levels of inter- and intra-accession variability were observed. Consequently, the designation of species or accessions as resistant or susceptible must take this variation into account. This study calls into question the assumption that taxonomic or geographic data can be used to predict sources of early blight resistance in wild Solanum species.


Asunto(s)
Ascomicetos/fisiología , Enfermedades de las Plantas/microbiología , Solanum tuberosum/microbiología , ADN de Plantas/genética , Interacciones Huésped-Patógeno , Inmunidad Innata/genética , Enfermedades de las Plantas/genética , Plastidios/genética , Solanum tuberosum/clasificación , Solanum tuberosum/genética , Especificidad de la Especie
11.
Clin Oncol (R Coll Radiol) ; 20(7): 517-22, 2008 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-18514495

RESUMEN

AIMS: Imatinib mesylate, a selective tyrosine kinase receptor inhibitor of KIT and PDGFRalpha, is currently licensed for the treatment of unresectable or metastatic gastrointestinal stromal tumours (GISTs), which are KIT positive. Partial response rates in 65% of patients and stable disease in 20% of patients are typically seen. The aim of this study was to assess the effectiveness and toxicity of an unselected cohort of patients treated with imatinib mesylate and to compare these results with published data. MATERIALS AND METHODS: A retrospective audit of the use of imatinib mesylate in GISTs within the Pan-Birmingham Cancer Network was carried out. In total, 39 patients were identified, the first commenced imatinib mesylate in September 2001. RESULTS: The most common primary tumour sites were small intestine (19 [49%]) and stomach (12 [31%]). Initial curative resection was carried out in 21 (54%), palliative resection in three (8%) and 15 (38%) were unresectable. Of those who had curative resection, the median time to recurrence was 13 months (range 2-276). Common sites of metastases were liver (19 [49%]) and peritoneum (12 [31%]). At 24 months 70% remained on imatinib. A partial response was reported in 23 (59%), stable disease in seven (18%) and disease progression in four (10%). Five patients (13%) have yet to be reassessed at 3 months. Imatinib was well tolerated with minor side-effects; peri-orbital oedema (nine [23%]), skin rash (four [10%]), minor gastrointestinal bleed (one [3%]). No significant toxicity was documented in 18 (46%). CONCLUSIONS: The response rates achieved in this unselected cohort of patients are consistent with published data. The duration of tumour control is good, with most patients responding to imatinib mesylate for more than 2 years. Side-effects are mild and acceptable.


Asunto(s)
Tumores del Estroma Gastrointestinal/tratamiento farmacológico , Piperazinas/uso terapéutico , Inhibidores de Proteínas Quinasas/uso terapéutico , Pirimidinas/uso terapéutico , Adulto , Anciano , Anciano de 80 o más Años , Algoritmos , Benzamidas , Femenino , Tumores del Estroma Gastrointestinal/mortalidad , Humanos , Mesilato de Imatinib , Masculino , Persona de Mediana Edad , Piperazinas/efectos adversos , Inhibidores de Proteínas Quinasas/efectos adversos , Pirimidinas/efectos adversos , Estudios Retrospectivos , Análisis de Supervivencia
12.
Clin Oncol (R Coll Radiol) ; 19(1): 50-5, 2007 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-17305254

RESUMEN

AIMS: A retrospective review of patients with histologically confirmed primary bone lymphoma (PBL) diagnosed and treated at a single tertiary referral centre between 1985 and 2003. MATERIALS AND METHODS: The medical records of all patients treated for histologically primary bone lymphoma were identified using the hospital data base. Data was obtained on patient demographics, stage, treatment and outcome. RESULTS: Twenty-two patients with PBL were identified. Seventeen had localised disease and five had multifocal bone involvement. The median age was 50 years. Of the patients who could be graded according to the International Prognostic Index (IPI), 12 cases were classified as low risk, seven as intermediate risk and one as high risk. All patients received chemotherapy; 19 with an anthracycline-containing regimen. Eighteen patients were treated with radiotherapy to a median total dose of 40 Gy (range 30-50 Gy). Three patients had surgery instead of radiotherapy as local treatment (one fibulectomy and two endoprosthetic replacements). The median follow-up was 84.5 months (range 3-206 months). The overall 10-year survival was 74%; 92% for low-risk IPI vs 73% for intermediate-risk IPI (P = 0.27). The 10-year relapse-free survival was 85% overall and 83% for both low- and intermediate-risk IPI (P = 0.87). Local relapse was seen in one patient. Orthopaedic complications occurred in two patients--one developed a pathological fracture after biopsy before radiotherapy and the other developed avascular necrosis outside the irradiated area. CONCLUSIONS: Combined modality treatment for PBL results in good local control and survival rates with acceptable toxicity.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias Óseas/terapia , Linfoma/terapia , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Neoplasias Óseas/mortalidad , Neoplasias Óseas/cirugía , Terapia Combinada , Femenino , Humanos , Linfoma/mortalidad , Linfoma/cirugía , Masculino , Persona de Mediana Edad , Radioterapia/efectos adversos , Estudios Retrospectivos , Análisis de Supervivencia , Resultado del Tratamiento
13.
J Bone Joint Surg Br ; 89(6): 808-13, 2007 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-17613509

RESUMEN

We identified 42 patients who presented to our unit over a 27-year period with a secondary radiation-induced sarcoma of bone. We reviewed patient, tumour and treatment factors to identify those that affected outcome. The mean age of the patients at presentation was 45.6 years (10 to 84) and the mean latent interval between radiotherapy and diagnosis of the sarcoma was 17 years (4 to 50). The median dose of radiotherapy given was estimated at 50 Gy (mean 49; 20 to 66). There was no correlation between radiation dose and the time to development of a sarcoma. The pelvis was the most commonly affected site (14 patients (33%)). Breast cancer was the most common primary tumour (eight patients; 19%). Metastases were present at diagnosis of the sarcoma in nine patients (21.4%). Osteosarcoma was the most common diagnosis and occurred in 30 cases (71.4%). Treatment was by surgery and chemotherapy when indicated: 30 patients (71.4%) were treated with the intention to cure. The survival rate was 41% at five years for those treated with the intention to cure but in those treated palliatively the mean survival was only 8.8 months (2 to 22), and all had died by two years. The only factor found to be significant for survival was the ability to completely resect the tumour. Limb sarcomas had a better prognosis (66% survival at five years) than central ones (12% survival at five years) (p = 0.009). Radiation-induced sarcoma is a rare complication of radiotherapy. Both surgical and oncological treatment is likely to be compromised by the treatment received previously by the patient.


Asunto(s)
Neoplasias Óseas/etiología , Neoplasias Inducidas por Radiación/etiología , Osteosarcoma/etiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Neoplasias Óseas/mortalidad , Neoplasias Óseas/terapia , Niño , Femenino , Humanos , Masculino , Persona de Mediana Edad , Neoplasias Inducidas por Radiación/mortalidad , Neoplasias Inducidas por Radiación/terapia , Osteosarcoma/mortalidad , Osteosarcoma/terapia , Radioterapia/efectos adversos , Factores de Riesgo
14.
J Clin Neurosci ; 38: 91-95, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-28117260

RESUMEN

Arteriovenous malformations (AVMs) are the leading causing of intra-cerebral haemorrhage. Stereotactic radiosurgery (SRS) is an established treatment for arteriovenous malformations (AVM) and commonly delivered using Gamma Knife within dedicated radiosurgery units. Linear accelerator (LINAC) SRS is increasingly available however debate remains over whether it offers an equivalent outcome. The aim of this project is to evaluate the outcomes using LINAC SRS for AVMs used within a UK neurosciences unit and review the literature to aid decision making across various SRS platforms. Results have shown comparability across platforms and strongly supports that an adapted LINAC based SRS facility within a dynamic regional neuro-oncology department delivers similar outcomes (in terms of obliteration and toxicity) to any other dedicated radio-surgical platform. Locally available facilities can facilitate discussion between options however throughput will inevitably be lower than centrally based dedicated national radiosurgery units.


Asunto(s)
Malformaciones Arteriovenosas Intracraneales/diagnóstico por imagen , Malformaciones Arteriovenosas Intracraneales/cirugía , Aceleradores de Partículas , Radiocirugia/métodos , Adulto , Hemorragia Cerebral/diagnóstico por imagen , Hemorragia Cerebral/cirugía , Femenino , Humanos , Masculino , Persona de Mediana Edad , Aceleradores de Partículas/estadística & datos numéricos , Radiocirugia/instrumentación , Estudios Retrospectivos , Resultado del Tratamiento
15.
Br J Radiol ; 79(941): 445-7, 2006 May.
Artículo en Inglés | MEDLINE | ID: mdl-16632628

RESUMEN

Extraspinal ependymomas are rare. The majority occur in the sacrococcygeal region. The subcutaneous variety accounts for approximately two thirds of cases, which are commonly misdiagnosed as a pilonidal cyst or sinus. Treatment is complete surgical resection. The role of coccygectomy is controversial. Adjuvant radiotherapy is of benefit to those with an incompletely excised tumour. Up to 20% metastasise, chiefly to the inguinal lymph glands, but pulmonary metastases are also reported. Palliative chemotherapy has not been shown to be of any benefit. Long term follow-up is important as metastases can occur up to 20 years after initial presentation. We report a 37-year-old woman with a subcutaneous sacrococcygeal ependymoma with iliac lymph nodal metastasis at presentation.


Asunto(s)
Ependimoma/diagnóstico , Recurrencia Local de Neoplasia/diagnóstico , Neoplasias de la Médula Espinal/diagnóstico , Adulto , Biomarcadores/análisis , Ependimoma/radioterapia , Ependimoma/cirugía , Femenino , Proteína Ácida Fibrilar de la Glía/análisis , Humanos , Ilion , Inmunohistoquímica/métodos , Metástasis Linfática , Imagen por Resonancia Magnética , Recurrencia Local de Neoplasia/radioterapia , Recurrencia Local de Neoplasia/cirugía , Radioterapia Adyuvante , Reoperación , Proteínas S100/análisis , Región Sacrococcígea , Neoplasias de la Médula Espinal/radioterapia , Neoplasias de la Médula Espinal/cirugía , Vimentina/análisis
16.
J Natl Cancer Inst ; 80(14): 1147-51, 1988 Sep 21.
Artículo en Inglés | MEDLINE | ID: mdl-2970555

RESUMEN

A total of 218 postmenopausal patients were entered in a prospective randomized trial comparing aminoglutethimide (AG) and high-dose medroxyprogesterone acetate (MPA) as second-line hormonal therapy for advanced breast carcinoma. All responses were assessed by the criteria of the International Union Against Cancer. The response rates were 27% (29 of 106 patients) for AG and 31% (35 of 112) for MPA, but if stabilization of previously progressive disease is included, then the overall response rates were 51% (54 of 106) and 54% (61 of 112) for patients receiving AG or MPA, respectively. There was no difference in response to the two drugs at any site of disease, and the durations of response and survival were identical for the two drugs. The time to response was significantly shorter for patients treated with MPA (median, 8.7 wk) than for those treated with AG (median, 15.3 wk) (chi 2 = 9.96, 1 df, P = .0016). The percentage of patients experiencing toxic effects was equivalent in both arms, although the patterns and time courses of these effects were different.


Asunto(s)
Aminoglutetimida/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Medroxiprogesterona/análogos & derivados , Aminoglutetimida/efectos adversos , Neoplasias de la Mama/mortalidad , Ensayos Clínicos como Asunto , Femenino , Humanos , Medroxiprogesterona/efectos adversos , Medroxiprogesterona/uso terapéutico , Acetato de Medroxiprogesterona , Persona de Mediana Edad , Distribución Aleatoria , Tamoxifeno/uso terapéutico , Factores de Tiempo
17.
J Natl Cancer Inst ; 81(5): 359-61, 1989 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-2464699

RESUMEN

We report a phase II study of bleomycin, ifosfamide, and cisplatin (BIP) in cervical cancer. Our aims were to assess response rate, toxicity, and survival in women treated with this combination. Among 49 patients, 34 objective responses (69%) were seen, with 10 complete responses (20%). Toxic effects were assessed in 186 treatment cycles. All patients had alopecia and nausea and vomiting. Other effects included myelosuppression, infection, reduction in renal function, and disturbance of consciousness. These data indicate that BIP is highly active against advanced and recurrent cervical cancer.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias del Cuello Uterino/tratamiento farmacológico , Adulto , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Bleomicina/administración & dosificación , Cisplatino/administración & dosificación , Evaluación de Medicamentos , Femenino , Humanos , Ifosfamida/administración & dosificación , Persona de Mediana Edad , Recurrencia Local de Neoplasia , Estudios Prospectivos , Neoplasias del Cuello Uterino/mortalidad
18.
J Clin Oncol ; 16(11): 3628-33, 1998 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-9817284

RESUMEN

PURPOSE: To investigate the possibility that the substitution of ifosfamide for cyclophosphamide therapy for Ewing's sarcoma will improve survival over that seen in the first United Kingdom Children's Cancer Study Group (UKCCSG) Ewing's tumor study (ET-1). PATIENTS AND METHODS: Between 1987 and 1993,243 patients (138 men or boys) were entered onto the study. The median age was 13.5 years (range, 1.5 to 27 years). The median follow-up was 58 months. Chemotherapy included four courses of vincristine 2 mg/m2; ifosfamide 9 g/m2; and doxorubicin 60 mg/m2 administered every 3 weeks. Treatment of the primary tumor was with surgery and/or radiotherapy followed by ifosfamide 6 g/m2; doxorubicin 60 mg/m2; and vincristine 2 mg/m2; with actinomycin D 1.5 mg/m2 substituted for doxorubicin after a total dose of 420 mg/m2. RESULTS: Two hundred one patients had no metastases. One hundred eighteen patients had tumors of the axial skeleton and 125 patients had limb primary tumors. The major toxicities were hematologic and infective, but there were no toxic deaths. The overall survival rate was 62% (95% confidence interval [CI], 56 to 69) and relapse-free survival (RFS) 56% (95% CI, 49 to 62). For those with no metastases at diagnosis, the RFS rate was 62% and for those with metastases, 23%. Multivariate analysis showed age and site to have a significant effect on RFS. Pelvic sites had the worst RFS rate of 41%; other axial sites, 55%; and extremity tumors, 73%. Age younger than 10 years had an RFS rate of 86% versus 55% for older patients. The local relapse rate for axial tumors was 20% and for limb primary tumors was 2.4%. CONCLUSION: The 5-year survival rate of 62% is improved compared with the 44% survival rate achieved in ET-1. This is probably caused by the use of higher doses of ifosfamide compared with relatively low doses of cyclophosphamide in ET-1.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias Óseas/tratamiento farmacológico , Ifosfamida/administración & dosificación , Sarcoma de Ewing/tratamiento farmacológico , Adolescente , Adulto , Neoplasias Óseas/mortalidad , Neoplasias Óseas/radioterapia , Niño , Preescolar , Terapia Combinada , Femenino , Humanos , Lactante , Masculino , Metástasis de la Neoplasia , Sarcoma de Ewing/mortalidad , Sarcoma de Ewing/radioterapia , Análisis de Supervivencia
19.
J Clin Oncol ; 10(10): 1579-91, 1992 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-1403038

RESUMEN

PURPOSE: A randomized pilot study was undertaken to assess the acute and chronic toxicities of two short intensive chemotherapy regimens, and to evaluate the feasibility of conservative surgery in this setting. Additional aims were to determine the clinical and radiologic response and the degree of histologic necrosis after chemotherapy. With extension of the study, eventual accrual was sufficient to compare disease-free survival (DFS) and overall survival (OS). PATIENTS AND METHODS: Between July 1983 and December 1986, the European Osteosarcoma Intergroup (EOI) entered 198 eligible patients with classic high-grade extremity osteosarcoma onto a randomized trial that compared doxorubicin (DOX) 25 mg/m2/d times three, intravenous (IV) bolus plus cisplatin (CDDP) 100 mg/m2, 24 hour infusion, every 3 weeks times six; the same combination was preceded 10 days earlier by high-dose methotrexate (HDMTX) 8 g/m2, 6-hour infusion, every 4.5 weeks times four. In the majority of patients (179), chemotherapy was commenced after biopsy; definitive surgery was scheduled at 9 weeks in both groups. RESULTS: Toxicities for both regimens did not differ substantially from those that occurred in other trials of adjuvant chemotherapy in osteosarcoma. Local recurrence (9%) and surgical complications (18%) after conservative surgery were acceptable. With a median follow-up of 53 months, DFS at 5 years is superior (P = .02) for DOX/CDDP, 57% versus 41%, although OS, 64% versus 50%, is not different significantly (P = .10). In a subset of 66 patients for whom pathologic data on the resected specimen were available, DFS (P = .003) and OS (P = .008) were better for those who demonstrated > or = 90% necrosis. CONCLUSION: A brief intensive chemotherapy regimen of DOX/CDDP has produced excellent long-term results, which are similar to those that have been achieved in cooperative group studies of longer, more complex multiagent chemotherapy, and provide the basis for a direct comparison in the next EOI study.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Extremidades , Osteosarcoma/tratamiento farmacológico , Adolescente , Adulto , Quimioterapia Adyuvante , Niño , Cisplatino/administración & dosificación , Doxorrubicina/administración & dosificación , Esquema de Medicación , Estudios de Factibilidad , Femenino , Humanos , Masculino , Metotrexato/administración & dosificación , Osteosarcoma/cirugía , Cooperación del Paciente , Proyectos Piloto , Resultado del Tratamiento
20.
J Clin Oncol ; 13(7): 1537-45, 1995 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-7602342

RESUMEN

PURPOSE: The aim of this trial was to compare the activity and toxicity of single-agent doxorubicin with that of two multidrug regimens in the treatment of patients with adult advanced soft tissue sarcomas. PATIENTS AND METHODS: This was a prospective randomized phase III trial performed by 35 cancer centers within the Soft Tissue and Bone Sarcoma Group of the European Organization for Research and Treatment of Cancer (EORTC). Six hundred sixty-three eligible patients were randomly allocated to receive either doxorubicin 75 mg/m2 (arm A), cyclophosphamide, vincristine, doxorubicin, and dacarbazine (CYVADIC) (arm B), or ifosfamide 5 g/m2 plus doxorubicin 50 mg/m2 (arm C). RESULTS: The overall response rate was 24% (95% confidence interval, 20.7% to 27.3%) among eligible patients and 26% among assessable patients. No statistically significant difference was detected among the three study arms in terms of response rate (arm A, 23.3%; arm B, 28.4%; and arm C, 28.1%), remission duration (median, 46 weeks on arm A, 48 weeks on arm B, and 44 weeks on arm C), or overall survival (median, 52 weeks on arm A, 51 weeks on arm B, and 55 weeks on arm C). The degree of myelosuppression was significantly greater for the combination of ifosfamide and doxorubicin than for the other two regimens. Cardiotoxicity was also more frequent in this arm, but other toxicities were similar. CONCLUSION: In advanced soft tissue sarcomas of adults, single-agent doxorubicin is still the standard chemotherapy against which more intensive or new drug treatments should be compared. Combination chemotherapy cannot be recommended outside a controlled clinical trial with the exclusion of some subsets of sarcoma patients for whom significant tumor volume reduction may be an important end point of a chemotherapy regimen.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Doxorrubicina/uso terapéutico , Sarcoma/tratamiento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Ciclofosfamida/administración & dosificación , Dacarbazina/administración & dosificación , Relación Dosis-Respuesta a Droga , Doxorrubicina/administración & dosificación , Doxorrubicina/efectos adversos , Femenino , Humanos , Ifosfamida/administración & dosificación , Ifosfamida/efectos adversos , Leucopenia/inducido químicamente , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Prospectivos , Inducción de Remisión , Sarcoma/mortalidad , Análisis de Supervivencia , Trombocitopenia/inducido químicamente , Vincristina/administración & dosificación
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