Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 38
Filtrar
1.
Surgeon ; 1(5): 279-82, 2003 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15570779

RESUMO

Elective surgical procedures are often delayed for up to six months in patients who have suffered a myocardial infarction (MI) because of the substantial risk of re-infarction and high peri-operative mortality. The optimal management of patients who have sustained a recent myocardial infarction and who require an emergency abdominal operation, however, has yet to be defined. The use of an intraaortic balloon pump (IABP) may play a role in such patients by improving the function of the injured heart. Three cases are presented in which IABP was used in patients who had recently sustained a myocardial infarction and who required emergency abdominal surgery. A review of the literature is presented and the application of IABP in such circumstances is discussed. Although clinical experience is limited, the use of the IABP may be useful in selected patients who have sustained a recent MI and who require emergency surgery.


Assuntos
Balão Intra-Aórtico , Infarto do Miocárdio/cirurgia , Idoso , Serviços Médicos de Emergência , Evolução Fatal , Humanos , Masculino , Pessoa de Meia-Idade
2.
Br J Radiol ; 75(891): 220-8, 2002 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-11932214

RESUMO

Axillary lymph node status is the most important prognostic factor in breast cancer patients and is currently determined by surgical dissection. This study was performed to assess whether dynamic gadopentetate dimeglumine (Gd) enhanced MRI is an accurate method for non-invasive staging of the axilla. 47 women with a new primary breast cancer underwent pre-operative dynamic Gd enhanced MRI of the ipsilateral axilla. Lymph node enhancement was quantitatively analysed using a region of interest method. Enhancement indices and nodal area were compared with histopathology of excised nodes using a receiver operating characteristic (ROC) curve approach. 10 patients had axillary metastases pathologically and all had > or =1 lymph node with an enhancement index of >21% and a nodal area of >0.4 cm(2). 37 patients had negative axillary nodes pathologically. 20 of these had enhancement indices <21% and nodal areas <0.4 cm(2). Using this method, a sensitivity of 100%, a specificity of 56%, a positive predictive value of 38% and a negative predictive value of 100% could be achieved. Using this method of quantitative assessment, dynamic Gd enhanced MRI may be a reliable method of predicting absence of axillary nodal metastases in women with breast cancer, thereby avoiding axillary surgery in women with a negative MRI study.


Assuntos
Neoplasias da Mama/patologia , Carcinoma/diagnóstico , Carcinoma/secundário , Imageamento por Ressonância Magnética/métodos , Idoso , Idoso de 80 Anos ou mais , Axila , Meios de Contraste , Feminino , Gadolínio DTPA , Humanos , Metástase Linfática/diagnóstico , Metástase Linfática/patologia , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Valor Preditivo dos Testes , Curva ROC , Sensibilidade e Especificidade
3.
Am J Surg ; 182(3): 207-10, 2001 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-11587678

RESUMO

BACKGROUND: After breast conservation surgery for breast cancer, patients are followed up by regular clinical examination and mammography, at intervals which vary according to local practice. However, the optimum interval remains unclear with current guidelines suggesting mammography should be carried out every 1 to 2 years. This study has investigated this aspect and, in particular, whether mammography or clinical examination or both allowed an early detection of recurrence of the disease in the conserved breast. METHODS: A total of 695 patients who had undergone breast conservation surgery were identified from a database of prospectively recorded data during the period 1990 to 1995. Clinical examination and annual mammography were performed in accordance with local protocol. The results of clinical examination, mammography, and local recurrence rates were evaluated. RESULTS: A total of 2,181 mammograms were undertaken in the 695 patients studied. Local recurrence of disease in the conserved breast occurred in 21 patients (3%), at a mean follow-up of 3.5 years. The first identification of tumor recurrence was by clinical examination in 11 patients with local recurrence, and by the surveillance mammography in the other 10 patients with local recurrence. Overall, mammography detected the local recurrence in 13 of 20 (65%) patients who underwent this examination. In the other patients, the recurrence was detected on clinical examination only. In addition, in 52 patients, mammography was falsely positive, giving a false positive rate of 2.3%. Contralateral cancers in the opposite breast were detected in 2 patients. CONCLUSIONS: The detection of local disease after breast conservation surgery requires both clinical examination and mammography. In the context of our follow-up policy, in 52% of patients with local recurrence, this was first identified by clinical examination. Disease recurrence was identified in the other 48% of patients by mammographic surveillance. Overall, mammography will identify or confirm local recurrence in two thirds of women. However, in a small number of cases (2.3% in our series) mammography will give false positive results. New imaging modalities to assist in the diagnosis of local recurrence of disease after breast conservation surgery are required.


Assuntos
Neoplasias da Mama/cirurgia , Mamografia , Mastectomia Segmentar , Recidiva Local de Neoplasia/diagnóstico por imagem , Adulto , Idoso , Reações Falso-Positivas , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Estudos Prospectivos
4.
J Clin Oncol ; 18(8): 1676-88, 2000 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-10764428

RESUMO

PURPOSE: To determine whether [(18)F]-fluorodeoxy-D-glucose ([(18)F]-FDG) positron emission tomography (PET) can predict the pathologic response of primary and metastatic breast cancer to chemotherapy. PATIENTS AND METHODS: Thirty patients with noninflammatory, large (> 3 cm), or locally advanced breast cancers received eight doses of primary chemotherapy. Dynamic PET imaging was performed immediately before the first, second, and fifth doses and after the last dose of treatment. Primary tumors and involved axillary lymph nodes were identified, and the [(18)F]-FDG uptake values were calculated (expressed as semiquantitative dose uptake ratio [DUR] and influx constant [K]). Pathologic response was determined after chemotherapy by evaluation of surgical resection specimens. RESULTS: Thirty-one primary breast lesions were identified. The mean pretreatment DUR values of the eight lesions that achieved a complete microscopic pathologic response were significantly (P =.037) higher than those from less responsive lesions. The mean reduction in DUR after the first pulse of chemotherapy was significantly greater in lesions that achieved a partial (P =.013), complete macroscopic (P =.003), or complete microscopic (P =.001) pathologic response. PET after a single pulse of chemotherapy was able to predict complete pathologic response with a sensitivity of 90% and a specificity of 74%. Eleven patients had pathologic evidence of lymph node metastases. Mean pretreatment DUR values in the metastatic lesions that responded did not differ significantly from those that failed to respond (P =.076). However, mean pretreatment K values were significantly higher in ultimately responsive cancers (P =.037). The mean change in DUR and K after the first pulse of chemotherapy was significantly greater in responding lesions (DUR, P =.038; K, P =.012). CONCLUSION: [(18)F]-FDG PET imaging of primary and metastatic breast cancer after a single pulse of chemotherapy may be of value in the prediction of pathologic treatment response.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/tratamento farmacológico , Fluordesoxiglucose F18 , Compostos Radiofarmacêuticos , Taxoides , Tomografia Computadorizada de Emissão , Adulto , Idoso , Antineoplásicos Fitogênicos/uso terapêutico , Axila , Biópsia , Neoplasias da Mama/patologia , Ciclofosfamida/administração & dosagem , Docetaxel , Doxorrubicina/administração & dosagem , Feminino , Humanos , Linfonodos/patologia , Metástase Linfática , Pessoa de Meia-Idade , Paclitaxel/análogos & derivados , Paclitaxel/uso terapêutico , Prednisolona/administração & dosagem , Sensibilidade e Especificidade , Vincristina/administração & dosagem
5.
J R Coll Surg Edinb ; 44(4): 226-30, 1999 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-10453144

RESUMO

UNLABELLED: To minimise delay in diagnosis and reduce patient anxiety, triple assessment with immediate reporting has been used in our symptomatic breast clinic since 1991. This article examines the accuracy of the diagnostic modalities used and the efficacy of the "one-stop" diagnostic policy. The data on 1,110 new patients presenting to the symptomatic breast clinic between January and July 1993, were analysed and subsequent three year follow-up and outcome established. Fine needle aspiration cytology (FNAC) gave the highest predictive value (97.3%) with a sensitivity of 93.5% and a specificity of 98.1%. Ultrasonography provided a 97.0% prediction with a sensitivity of 88.9% and a specificity of 97.4%, whereas mammography had a prediction of 96.4% with sensitivity of 93.2% and a specificity of 96.7%. When the mammogram or ultrasound scan were reported as unequivocally benign (M1), there were no missed cancers. The false positive and false negative rates for FNAC were 0% and 1.4%, respectively. Following assessment, a diagnosis was made in 96% of patients. Sixty-two percent of the patients were discharged at the first clinic visit. Four breast malignancies were subsequently diagnosed in the discharged group; two with new microcalcifications due to ductal carcinoma in situ, one with invasive disease in a different quadrant of the breast from that originally investigated, and in one patient the cancer was missed. CONCLUSION: A "one-stop" symptomatic breast clinic provides an accurate and effective means of establishing a correct diagnosis.


Assuntos
Doenças Mamárias/diagnóstico , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Instituições de Assistência Ambulatorial , Biópsia por Agulha , Doenças Mamárias/diagnóstico por imagem , Doenças Mamárias/patologia , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/diagnóstico por imagem , Carcinoma in Situ/diagnóstico por imagem , Carcinoma Ductal de Mama/diagnóstico por imagem , Erros de Diagnóstico , Feminino , Seguimentos , Humanos , Mamografia , Pessoa de Meia-Idade , Sensibilidade e Especificidade , Ultrassonografia
6.
Br J Cancer ; 80(1-2): 262-8, 1999 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-10390006

RESUMO

The diagnosis and treatment of breast cancer are stressful, and stress may be associated with a poorer response to chemotherapy. There is a need, therefore, to develop and evaluate interventions that might enhance quality of life and, possibly, improve treatment response. The effects of relaxation combined with guided imagery (visualizing host defences destroying tumour cells) on quality of life and response to primary chemotherapy, to date, have not been adequately evaluated. Ninety-six women with newly diagnosed large or locally advanced breast cancer (T2 > 4 cm, T3, T4, or TxN2 and M0) took part in a prospective, randomized controlled trial. Patients were randomized following diagnosis to a control condition (standard care) or to the experimental condition (standard care plus relaxation training and imagery). Psychometric tests to evaluate mood and quality of life were carried out before each of the six cycles of chemotherapy and 3 weeks after cycle 6: tests of personality and coping strategy were carried out prior to cycles one and six. Clinical response to chemotherapy was evaluated after six cycles of chemotherapy using standard UICC criteria and pathological response was assessed from the tissue removed at surgery. As hypothesized, patients in the experimental group were more relaxed and easy going during the study (Mood Rating Scale). Quality of life was better in the experimental group (Global Self-assessment and Rotterdam Symptom Checklist). The intervention also reduced emotional suppression (Courtauld Emotional Control Scale). The incidence of clinically significant mood disturbance was very low and the incidence in the two groups was similar. Finally, although the groups did not differ for clinical or pathological response to chemotherapy, imagery ratings were correlated with clinical response. These simple, inexpensive and beneficial interventions should be offered to patients wishing to improve quality of life during primary chemotherapy.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Neoplasias da Mama/psicologia , Tratamento Farmacológico/métodos , Imagens, Psicoterapia , Terapia de Relaxamento , Estresse Psicológico/prevenção & controle , Neoplasias da Mama/tratamento farmacológico , Tratamento Farmacológico/psicologia , Feminino , Humanos , Pessoa de Meia-Idade , Estudos Prospectivos , Psicometria , Qualidade de Vida
7.
Eur J Cancer ; 35(13): 1783-8, 1999 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-10673992

RESUMO

This study evaluated the possible value of psychological variables in predicting clinical and pathological response to primary chemotherapy. 96 women with newly diagnosed large, or locally advanced, breast cancer (T2 > 4 cm, T3, T4, N2 and M0) participated in a prospective, randomised trial to evaluate the effects of relaxation training with guided imagery and L-arginine on response to primary chemotherapy. Before the first of six cycles of primary chemotherapy, women were assessed using the Hospital Anxiety and Depression Scale (HADS) and the Eysenck Personality Questionnaire (EPQ). The primary outcomes were clinical response (evaluated using standard International Union Against Cancer (UICC) criteria) and pathological response (graded by means of a previously published 5-point scale) following primary chemotherapy. Stepwise linear regressions were used to estimate the predictive value of age, menopausal status, clinical nodal status, tumour size at diagnosis, oestrogen receptor status, dietary supplementation (L-arginine versus placebo), personality (EPQ-L scores), mood (HADS scores) and a psychological intervention. HADS depression score was a significant independent predictor of pathological response to chemotherapy. HADS anxiety score was a significant independent predictor of clinical response. Because the original tumour size before chemotherapy (also a significant predictor of clinical and pathological responses) was taken into account in the analyses, the results cannot be explained in terms of psychobiological factors related to tumour size. This study supports the importance of psychological factors as independent predictors of response to primary chemotherapy in patients with breast cancer. If they can be replicated, these findings have major implications for the management of women with breast cancer. Psychological factors need to be assessed and evaluated in future trials of chemotherapy.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/psicologia , Neoplasias da Mama/terapia , Imagens, Psicoterapia/métodos , Terapia de Relaxamento , Adulto , Idoso , Ansiedade/etiologia , Depressão/etiologia , Feminino , Humanos , Mastectomia/métodos , Pessoa de Meia-Idade , Estudos Prospectivos , Escalas de Graduação Psiquiátrica , Resultado do Tratamento
8.
Ann Surg ; 228(2): 220-7, 1998 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-9712568

RESUMO

OBJECTIVE: To evaluate the ability of positron emission tomography (PET) with 18F-fluoro-2-deoxy-D-glucose (18F-FDG) to determine noninvasively axillary lymph node status in patients with breast cancer. BACKGROUND: The presence of axillary lymph node metastasis is the most important prognostic factor in women with breast cancer. It signifies the presence of occult metastatic disease and indicates the need for adjuvant therapy. The only reliable way in which this important prognostic information may be obtained is by performing axillary dissection, which may be associated with significant complications and delay in discharge from the hospital. PET with 18F-FDG can visualize primary cancers in the breast and metastatic tumor deposits. METHODS: Fifty patients with untreated breast cancer had clinical examination of their axilla performed (graded as positive or negative), followed by PET of the axilla and midthorax. PET data were analyzed blindly and graded as positive or negative, depending on the presence or absence of axillary nodal metastases. Cytopathologic assessment of the axillary nodes was carried out within 1 week of PET, by fine-needle aspiration cytology in 5 patients and axillary dissection in 45; the excised specimens were examined by a single pathologist. RESULTS: The overall sensitivity of PET in 50 patients was 90% and the specificity was 97%. Clinical examination of the same patients had an overall sensitivity of 57% and a specificity of 90%. In the 24 patients with locally advanced breast cancer (T3, T4, TxN2), PET had a sensitivity of 93% and a specificity of 100%. In T1 tumors (seven patients), the sensitivity and specificity were 100%. PET had a high predictive value (>90%) and accuracy (94%) in staging the axilla. CONCLUSIONS: PET is a sensitive and specific method of staging the axilla in patients with breast cancer. It may obviate the need for axillary surgery in women with small primary tumors, define the women likely to benefit from axillary dissection, or allow radiotherapy to be substituted for surgery, particularly in post-menopausal women.


Assuntos
Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/patologia , Fluordesoxiglucose F18 , Metástase Linfática/diagnóstico por imagem , Compostos Radiofarmacêuticos , Tomografia Computadorizada de Emissão , Adulto , Idoso , Idoso de 80 Anos ou mais , Axila , Feminino , Humanos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Valor Preditivo dos Testes , Sensibilidade e Especificidade , Tomografia Computadorizada de Emissão/métodos
9.
Am J Surg ; 175(2): 127-32, 1998 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-9515529

RESUMO

BACKGROUND: Neoadjuvant (primary) chemotherapy is being used increasingly in the treatment of patients with large and locally advanced breast cancer with the aim of reducing the size of the primary tumor and eliminating micrometastatic disease. Response rates to, compliance with, and survival of patients following neoadjuvant chemotherapy have been variable. We report the results of a consecutive series of 77 patients with breast cancer who received neoadjuvant chemotherapy. METHODS: Seventy-seven patients with locally advanced breast cancers were treated with multimodality therapy comprising up to six cycles of chemotherapy (cyclophosphamide, vincristine, doxorubicin, and prednisolone), radiotherapy, and then surgery. The median follow-up was 54 months. Clinical response rates to therapy and overall survival have been documented. In addition, prognostic factors for survival were identified using the Cox proportional hazards model. RESULTS: The overall objective response rate of the primary tumor to chemotherapy alone was 87% (25% complete and 62% partial responses, UICC criteria). Following radiotherapy the response rate was 90% (52% complete and 38% partial responses). The overall 5-year survival for all patients was 0.48. However, the probability of survival at 5 years was 0.74 in those with a complete response, and 0.36 if there was a partial clinical response, but no patients who had either stasis of disease or progression survived for 5 years. Independent predictors of better survival that were identified were a complete histopathological response after chemotherapy and radiotherapy, a complete clinical response to chemotherapy, and five or six cycles of chemotherapy versus four or less. CONCLUSIONS: Neoadjuvant chemotherapy in patients with large and locally advanced breast cancers can result in satisfactory local control and overall survival rates, especially in patients with a complete clinical or histopathological response after treatment.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/patologia , Neoplasias da Mama/radioterapia , Neoplasias da Mama/cirurgia , Terapia Combinada , Feminino , Humanos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Modelos de Riscos Proporcionais , Análise de Sobrevida
10.
Int J Oncol ; 12(1): 221-5, 1998 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-9454908

RESUMO

Patients with large primary breast cancers are being treated with neo-adjuvant chemotherapy. Studies in animals have shown that responses to chemotherapy can be increased by dietary manipulation of tumour cell metabolism. Also dietary supplementation with the amino acid L-arginine, resulted in an increase in tumour metabolic activity expression of the nuclear activation antigen, Ki67, in patients with breast cancer. Therefore, we have carried out a randomised, double blind, placebo controlled trial to determine if L-arginine supplementation is beneficial in patients with breast cancer, undergoing neo-adjuvant chemotherapy. 96 patients were randomised to receive L-arginine (30 g/day) for three days (n = 48) or placebo (n = 48) prior to undergoing chemotherapy (doxorubicin, cyclophosphamide, vincristine, prednisolone), 6 pulses at 21-day intervals. Clinical and pathological responses were assessed in both groups of patients following completion of chemotherapy. The clinical response rate was 77% (23% complete and 54% partial responses) in the L-arginine treated group, compared with 71% (15% complete and 56% partial) in the placebo group of patients (p = ns). However, in patients with tumours less than 6 cm in initial diameter, there was a significant increase in the better histopathological responses in the L-arginine group, when compared with the placebo group of patients (88% vs 52%, p = 0.04). This may have important implications for clinical practice.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Arginina/administração & dosagem , Neoplasias da Mama/tratamento farmacológico , Ciclofosfamida/uso terapêutico , Doxorrubicina/uso terapêutico , Prednisona/uso terapêutico , Vincristina/uso terapêutico , Adenocarcinoma/tratamento farmacológico , Adenocarcinoma/metabolismo , Adenocarcinoma/patologia , Adulto , Idoso , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/tratamento farmacológico , Carcinoma Ductal de Mama/metabolismo , Carcinoma Ductal de Mama/patologia , Carcinoma Lobular/tratamento farmacológico , Carcinoma Lobular/metabolismo , Carcinoma Lobular/patologia , Suplementos Nutricionais , Método Duplo-Cego , Sinergismo Farmacológico , Feminino , Humanos , Mastectomia , Pessoa de Meia-Idade , Terapia Neoadjuvante , Estadiamento de Neoplasias , Radioterapia Adjuvante
12.
J R Coll Surg Edinb ; 41(1): 30-4, 1996 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-8930039

RESUMO

The diagnostic accuracy of clinical examination, mammography, ultrasonography and fine needle aspiration (FNA) cytology in discriminating between benign and malignant breast lesions has been retrospectively assessed in 603 patients who attended the Professorial Breast Clinic and then underwent surgical biopsy, in Aberdeen Royal Infirmary, between January 1989 and September 1992. In this series of patients, FNA cytology gave the highest overall prediction of malignancy (92.6%) with a sensitivity of 87% and a specificity of 98%, whilst ultrasonography gave the lowest correct overall prediction (75.6%), with a sensitivity of 70% and a specificity of 79%. Using all the available findings (clinical examination, mammography, ultrasonography, FNA) as well as the patients' age, a stepwise logistic discriminant analysis was used to derive a mathematical equation for use as a novel diagnostic index. Weighted scores, derived from each variable, were used in the discriminant equation to predict the likelihood of malignancy in patients of different ages (>90%). For young patients (<35 years) the discriminant analysis predicted the diagnosis in 98% of women correctly. Quadruple assessment provides an opportunity for establishing the likely diagnosis in most patients the same day they visit the Breast Clinic. The diagnostic index, currently being evaluated prospectively in our breast clinic, may be a further aid to establishing a correct diagnosis.


Assuntos
Neoplasias da Mama/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/prevenção & controle , Análise Discriminante , Feminino , Humanos , Pessoa de Meia-Idade , Ambulatório Hospitalar , Valor Preditivo dos Testes , Estudos Retrospectivos , Sensibilidade e Especificidade
13.
FEBS Lett ; 374(2): 270-2, 1995 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-7589551

RESUMO

The expression of CYP1B1 has been identified in breast cancer using the reverse transcriptase-polymerase chain reaction and immunoblotting. CYP1B1 mRNA was expressed in the majority of breast tumours and immunoblotting of breast tumours identified a single protein band of molecular weight 60 kDa corresponding to the predicted molecular weight of human CYP1B1. This is the first study to identify CYP1B1 expression in a tumour where it may represent a previously unknown pathway for the metabolism of oestradiol and chemotherapeutic drugs.


Assuntos
Hidrocarboneto de Aril Hidroxilases , Neoplasias da Mama/enzimologia , Sistema Enzimático do Citocromo P-450/biossíntese , Adulto , Idoso , Idoso de 80 Anos ou mais , Sequência de Bases , Neoplasias da Mama/patologia , Citocromo P-450 CYP1B1 , Sistema Enzimático do Citocromo P-450/genética , Primers do DNA , Feminino , Humanos , Immunoblotting , Pessoa de Meia-Idade , Dados de Sequência Molecular , Reação em Cadeia da Polimerase , RNA Mensageiro/metabolismo , Transcrição Gênica
14.
Surgery ; 118(3): 531-8, 1995 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-7652690

RESUMO

BACKGROUND: Surgical procedures suppress host antitumor defense mechanisms, which may increase the risk of metastatic tumor dissemination. We have evaluated the effects of the biologic response modifier polyadenylic-polyuridylic acid (PAPU) on natural cytotoxicity in patients with breast cancer undergoing operation. METHODS: PAPU (150 mg) or placebo was given intravenously during the perioperative period (preoperative, days -1 and 0; postoperative, days 1, 3, 5, 7, and 14). The function (chromium release assay) and number (flow cytometry) of natural killer (NK) cells were measured before operation (days -2 and -1), on the day of operation (day 0), and after operation (days 1, 2, 4, 6, and 18). RESULTS: Surgical procedures suppressed NK cell cytotoxicity in the placebo group on postoperative days 1 (p < 0.001), 4, 6, and 18 (p < 0.05), whereas inhibition on postoperative day 2 failed to reach significance. PAPU abolished this immunosuppression after operation. The NK cell activity was elevated when compared with the control group; it was significant (p < 0.05) on postoperative days 1, 2, 4, 6, and 18. Surgical procedures also reduced circulating NK cell numbers during the first postoperative week in the placebo group; the decrease was statistically significant on day 4. The decrease in NK cell numbers in the PAPU group was insignificant. CONCLUSIONS: PAPU prevented the decrease in the circulating number and cytotoxic activity of NK cells that occurred after operation and enhanced NK cell cytotoxicity. This may have important implications for patients with cancer undergoing major operation.


Assuntos
Neoplasias da Mama/cirurgia , Citotoxicidade Imunológica/efeitos dos fármacos , Células Matadoras Naturais/imunologia , Mastectomia , Poli A-U/farmacologia , Adulto , Idoso , Neoplasias da Mama/imunologia , Método Duplo-Cego , Feminino , Humanos , Imunofenotipagem , Pessoa de Meia-Idade , Receptores de IgG/análise
15.
J R Coll Surg Edinb ; 40(3): 180-4, 1995 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-7616472

RESUMO

All the 638 new hospital cases of abdominal aortic aneurysm (AAA) diagnosed in the Grampian region of Scotland, over the 12-year period between January 1980 and December 1991, were studied. Information was obtained from the Scottish Morbidity Record Form 1 (SMR1). The number of AAA cases has risen from 19 in 1980 to 84 in 1991 totalling 638 cases in the 12-year study period. Of these, 29% were women, a percentage which remained fairly constant for each year of the study. The mean age of the study population was 73.8 years; higher in women (74.7 in intact and 76.6 in ruptured cases) than in men (71 in intact and 73.1 in ruptured cases). There was a significant increase in the percentage of patients over the age of 75 years (from 31.6% in 1980 to 41.7% in 1991) which was very marked in men (from 25% to 40%). This may indicate that ageing of the population is partly responsible for the apparent increased incidence of the disease. Ruptured AAA constituted 36.5% of all cases of which 76.4% were men. The rate of ruptured cases has dropped from 73.7% in 1980 to 32.1% in 1991 probably owing to operating on more elective cases. Analysis of hospital fatality, including unoperated cases, showed a fatality rate of 8.4% for intact cases as opposed to 46.3% for ruptured cases. Allowing for improved diagnostic techniques and clinical awareness of the disease, the figures suggest a true increase in the incidence of AAA in the Grampian region.


Assuntos
Aneurisma da Aorta Abdominal/epidemiologia , Idoso , Ruptura Aórtica/epidemiologia , Feminino , Humanos , Masculino , Escócia/epidemiologia
16.
Ann R Coll Surg Engl ; 77(1): 16-20, 1995 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-7717637

RESUMO

This retrospective study has reviewed the surgical management of the septic complications of diverticular disease involving the left colon in 77 patients who presented between 1980 and 1992. Over this period, Hartmann's resection continued to be the predominant surgical procedure. The overall mortality and morbidity rates in the study period were 10% and 31%, respectively. However, a marked improvement in survival was recorded in the latter half of the study (17% vs 6%). The mortality from Hartmann's resection was also reduced substantially in the second half of the study (24% vs 7.5%). These improvements occurred despite having a higher number of poor-risk patients (APACHE II score) with more severe pathology (generalised peritonitis, 35% vs 50%; faecal peritonitis, 9% vs 25%) in the latter half. There was a significantly worse survival in patients who were over 70 years of age (P < 0.03), those who had a severe concomitant medical illness (P < 0.02), those who had a generalised peritonitis (P < 0.02), and in those patients who had an APACHE II score of over 11 (P < 0.05) (Fisher's exact test). There was no difference in outcome (morbidity, mortality) between the various grades of surgeon involved in performing the emergency surgical procedures.


Assuntos
Doença Diverticular do Colo/cirurgia , Peritonite/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Anastomose Cirúrgica , Colostomia , Cuidados Críticos , Doença Diverticular do Colo/complicações , Humanos , Corpo Clínico Hospitalar , Pessoa de Meia-Idade , Peritonite/etiologia , Complicações Pós-Operatórias/mortalidade , Estudos Retrospectivos , Fatores de Risco
17.
J R Coll Surg Edinb ; 39(4): 239-42, 1994 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-7807457

RESUMO

From January 1980 to December 1992, sixty-two Hartmann's procedures were performed for septic complications of sigmoid diverticular disease, in the Professorial Unit at Aberdeen Royal Infirmary. Colorectal continuity was subsequently restored in 53% of the fifty-three surviving patients. The overall morbidity and mortality was 34% and 0% respectively. There were two anastomotic leaks (7%) while two patients (7%) developed anastomotic stenoses requiring multiple dilations. Closure of Hartmann's colostomy was carried out by consultants (48%), senior registrars (38%) and registrars with consultant supervision (14%). Fifteen anastomoses were hand sewn and fourteen were stapled. Twenty-one per cent of patients had closure of colostomy in less than 3 months, 48% between 3 and 6 months and 31% of reversals were carried out more than 6 months following their formation. The grade of surgeon had no influence on the outcome of reversal. Although the numbers were small, the morbidity was found to be highest in those patients in whom colostomy closure was carried out within 3 months of colostomy formation. Also, there was an increased incidence (7%) of anastomotic stenoses in the stapled anastomosis group.


Assuntos
Colostomia/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Divertículo do Colo/complicações , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Peritonite/etiologia , Peritonite/cirurgia , Complicações Pós-Operatórias , Reoperação
18.
Br J Cancer ; 69(5): 918-21, 1994 May.
Artigo em Inglês | MEDLINE | ID: mdl-8180024

RESUMO

L-Arginine has been shown, in human breast cancers, to increase protein synthesis and the number of cells in the growth phase of the cell cycle. L-Arginine, therefore, may potentiate the response of breast cancers to cell cycle-specific cytotoxic agents. This phase II pilot study assessed the clinical, radiological and pathological responses in 44 patients with breast cancers > 4 cm in diameter (46 tumours: T2, n = 6; T3, n = 22; T4, n = 19), who received oral L-arginine 30 g day-1 for 3 days prior to each cycle of CHOP chemotherapy, followed after 4-6 cycles by radiotherapy. Following this treatment, 95% of patients had a clinical response: complete response in 30% and partial response in 65%. Imaging, ultrasound and mammography revealed response rates of 91% and 76% respectively. Surgery was performed in 43 patients. Histological examination revealed that in 18% of cases there was no residual evidence of tumour. Furthermore, if residual tumour was identified, the degree of destruction was graded as 'severe' in 36% and 'moderate' in 30% of cases. Further studies are now required to evaluate the potential beneficial use of nutritional pharmacology in combination with existing treatment regimens.


Assuntos
Arginina/administração & dosagem , Neoplasias da Mama/patologia , Neoplasias da Mama/terapia , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/metabolismo , Terapia Combinada , Ciclofosfamida/administração & dosagem , Doxorrubicina/administração & dosagem , Estudos de Viabilidade , Feminino , Humanos , Mamografia , Mastectomia , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prednisona/administração & dosagem , Dosagem Radioterapêutica , Ultrassonografia , Vincristina/administração & dosagem
19.
Surgery ; 115(2): 205-12, 1994 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-8310409

RESUMO

BACKGROUND: The amino acid L-arginine is known to have immunostimulatory effects in animals and healthy human volunteers. We have studied the effect of dietary supplementation with L-arginine (30 gm/day for 3 days) on host defenses in patients with breast cancer. METHODS: Mitogenic responses of peripheral blood lymphocytes to concanavalin A, phytohemagglutinin, and pokeweed mitogen and phenotype analysis of lymphocyte subsets and activation markers were assessed before and after 3 days of L-arginine supplementation. The effect of L-arginine supplementation on natural killer and lymphokine-activated killer cell cytotoxicity and serum levels of the cytokines interleukin-1 beta and 2, interferon-gamma, and tumor necrosis factor-alpha were also measured. RESULTS: L-arginine significantly increased lymphocyte mitogenic reactivity to concanavalin A, phytohemagglutinin, and pokeweed mitogen (mean percentage increases: 64% [p < 0.001], 65% [p < 0.001], and 48% [p < 0.05], respectively). Natural killer and lymphokine-activated killer cell cytotoxicity was also significantly enhanced after L-arginine intake (mean percentage increase, 81% and 107% [p < 0.001]). However, no corresponding increase in circulating CD16+ and CD56+ cells was obtained: Arginine supplementation did not increase the level of serum cytokines. CONCLUSIONS: Dietary supplementation with L-arginine in patients with breast cancer significantly enhances host defenses and therefore may have a role in adjuvant treatment.


Assuntos
Arginina/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/imunologia , Imunização/métodos , Idoso , Neoplasias da Mama/patologia , Citocinas/sangue , Citotoxicidade Imunológica , Feminino , Humanos , Células Matadoras Ativadas por Linfocina/fisiologia , Células Matadoras Naturais/fisiologia , Subpopulações de Linfócitos/fisiologia , Pessoa de Meia-Idade , Mitógenos/farmacologia , Fenótipo
20.
J R Coll Surg Edinb ; 38(1): 9-15, 1993 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-8437157

RESUMO

Forty-two patients with locally advanced breast cancer were treated with multimodality therapy comprising neoadjuvant chemotherapy (cyclophosphamide, vincristine, doxorubicin and prednisolone) and radiotherapy to the breast and lymph-draining areas, followed by tamoxifen and then selective surgery. The objective response rate (UICC criteria) of the primary tumours to chemotherapy alone was 72%, which increased to 83% following radiotherapy. The patients have been followed up for 13-56 months and the probability of local control at 36 months was 0.83. The probabilities of distant disease-free survival and overall survival were 0.50 and 0.65 respectively, at 36 months. However, if the patients' breast cancers had shown a response to chemotherapy/radiotherapy then the distant disease-free survival and overall survival of these subgroups of patients were 0.61 and 0.83 respectively, at 36 months. Toxicity included nausea, vomiting, alopecia, and peripheral neuropathies (two patients), but with no episodes of severe infection or bleeding. This multimodality therapy has achieved good local control and satisfactory overall and distant disease-free survivals with excellent patient compliance.


Assuntos
Neoplasias da Mama/terapia , Adulto , Idoso , Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Terapia Combinada , Humanos , Masculino , Mastectomia , Pessoa de Meia-Idade , Recidiva Local de Neoplasia , Estadiamento de Neoplasias , Probabilidade , Escócia/epidemiologia , Taxa de Sobrevida , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...