RESUMO
CHADS2 and CHA2DS2-VASc scores are widely used in clinical practice and include similar risk factors for the development of coronary artery disease (CAD). It is known that the factors comprising the newly defined CHA2DS2-VASC-HSF score promote atherosclerosis and associated with severity of CAD. Objective of the study was to find out the association of the CHA2DS2-VASC-HSF score with the severity of CAD in patients with ST elevation myocardial infarction (STEMI). One hundred (100) patients with STEMI were enrolled in this study after considering inclusion and exclusion criteria over a one year period from October, 2017 to September, 2018 in the Department of Cardiology, National Institute of Cardiovascular Diseases, Dhaka, Bangladesh. Coronary angiogram was done within index hospitalization and coronary artery disease severity was assessed by SYNTAX score system. Patients were divided into two groups on the basis of SYNTAX score. Patients with SYNTAX score ≥23 assigned as Group I and SYNTAX score <23 assigned as Group II. The CHA2DS2-VASC-HSF score was calculated. Cut-off value of high CHA2DS2-VASC-HSF score was ≥4.0. In this study mean age of study population was 51.8±9.8, male patients were predominant (79.0%). Among the studied patients, highest percentage had history of smoking followed by hypertension, diabetes mellitus and family history of CAD in Group I patients. It was found that DM and family history of CAD and history of stroke/TIA were significantly higher in Group I than Group II. An increasing trend of SYNTAX score was observed according to the CHA2DS2-VASc-HSF score. SYNTAX score was significantly higher in CHA2DS2-VASc-HSF score ≥4 than CHA2DS2-VASc-HSF score <4 (26.3±6.3 vs. 12.1±7.7, p<0.001). Patients with CHA2DS2-VASC-HSF score ≥4 had severe coronary artery disease than CHA2DS2-VASC-HSF score <4 assessed by SYNTAX score with 84.4% sensitivity and 81.9% specificity (AUC:0.83, 95% CI: 0.746-0.915, p<0.001). CHA2DS2-VASc-HSF score was positively correlated with the severity of CAD. This score could be considered as a predictor of coronary artery disease severity.
Assuntos
Doença da Artéria Coronariana , Infarto do Miocárdio com Supradesnível do Segmento ST , Humanos , Masculino , Doença da Artéria Coronariana/complicações , Doença da Artéria Coronariana/epidemiologia , Medição de Risco , Prognóstico , Bangladesh , Fatores de Risco , Índice de Gravidade de Doença , Estudos RetrospectivosRESUMO
Estimation of visceral adipose tissue is important as it carries high cardiometabolic risk and several methods are available as its surrogate. Epicardial fat thickness (EFT) is a direct measure of visceral fat rather than anthropometric measurements. EFT can be accurately measured by two-dimensional (2D) echocardiography. It tends to be higher in patients with Acute Coronary Syndrome (ACS). The present study was intended to find out the association between echocardiographic EFT and severity of Coronary Artery Disease (CAD) in patients with ACS. This cross-sectional observational study was carried out in the department of cardiology, National Institute of Cardiovascular Diseases, Dhaka, Bangladesh from October 2017 to September 2018. Sampling technique was purposive sampling. Comparison between groups was done by unpaired-t test & dichotomous variables were compared by chi-square test. A total of 164 patients was enrolled in the study, prospectively examined EFT on echocardiography and patients were divided into 2 groups, Group I patients with EFT >4.65mm and Group II patients with EFT ≤4.65mm. Coronary angiograms were analyzed for the extent and severity of CAD using Gensini score. The mean EFT (mm) was found 6.1±1.0 in Group I and 3.5±0.7 in Group II (p<0.001). Patients with a higher EFT were associated with a high Gensini score (Group I vs. Group II, 50.3±24.1 vs. 21.9±20.0; p<0.001). Multivariate analysis showed that EFT (OR 6.07, p<0.001) and smoking (OR 2.66, p=0.03) were independent factors affecting significant coronary artery stenosis. By ROC curve analysis, EFT >4.65mm predicated the presence of significant coronary stenosis by 76.1% sensitivity and 69.9% specificity. EFT measured using Transthoracic echocardiography (TTE) significantly correlates with the severity of CAD. It is sensitive, easily available, and cost-effective and assists in the risk stratification and may be an additional marker on classical risk factors for CAD.
Assuntos
Síndrome Coronariana Aguda , Doença da Artéria Coronariana , Síndrome Coronariana Aguda/diagnóstico por imagem , Síndrome Coronariana Aguda/epidemiologia , Bangladesh , Angiografia Coronária , Doença da Artéria Coronariana/diagnóstico por imagem , Doença da Artéria Coronariana/epidemiologia , Estudos Transversais , Ecocardiografia , Humanos , Pericárdio/diagnóstico por imagem , Fatores de Risco , Índice de Gravidade de DoençaRESUMO
Diabetes and cancer are common conditions highly prevalent in the general population. The co-existence of diabetes and cancer in a patient is therefore not unexpected. Diabetes increases the risk of mortality from cancer and morbidity from the treatment of cancer. Furthermore, many cancer chemotherapeutic regimens increase glucose levels, especially those involving glucocorticoids. Many clinical oncologists will deal with patients with diabetes in their clinical work, and some working knowledge of diabetes diagnosis and management is helpful when managing such patients. This overview aims to summarise the clinical diagnosis and management of diabetes, review the potential links between diabetes and cancer, and provide some practical guidance on the management of hyperglycaemia in patients undergoing cancer therapy.
Assuntos
Antineoplásicos/efeitos adversos , Complicações do Diabetes/diagnóstico , Complicações do Diabetes/tratamento farmacológico , Diabetes Mellitus/diagnóstico , Diabetes Mellitus/tratamento farmacológico , Neoplasias/tratamento farmacológico , Oncologistas/normas , Guias de Prática Clínica como Assunto/normas , Complicações do Diabetes/induzido quimicamente , Diabetes Mellitus/induzido quimicamente , HumanosRESUMO
Although micro- and macrovascular complications of diabetes are the most important cause of mortality and morbidity in people with diabetes, it is increasingly recognized that diabetes increases the risk of developing cancer. Diabetes and cancer commonly co-exist, and outcomes in people with both conditions are poorer than in those who have cancer but no diabetes. There is no randomized trial evidence that treating hyperglycaemia in people with cancer improves outcomes, but therapeutic nihilism should be avoided, and a personalized approach to managing hyperglycaemia in people with cancer is needed. This review aims to outline the link between diabetes therapies and cancer, and discuss the reasons why glucose should be actively managed people with both. In addition, we discuss clinical challenges in the management of hyperglycaemia in cancer, specifically in relation to glucocorticoids, enteral feeding and end-of-life care.
Assuntos
Antineoplásicos/efeitos adversos , Hiperglicemia/induzido quimicamente , Neoplasias/tratamento farmacológico , Assistência Terminal/métodos , Antineoplásicos/administração & dosagem , Glicemia , Comorbidade , Nutrição Enteral , Glucocorticoides , Humanos , Hiperglicemia/sangue , Neoplasias/metabolismo , Guias de Prática Clínica como AssuntoRESUMO
A 25 years married women having one child delivered vaginaly presented in the department of Obs & Gynae, Bangabandhu Sheikh Mujib Medical University, Bangladesh on April 2013 with pelvic pain and discomfort. No history of previous pelvic trauma was present. Patient examination showed a isolated mass in the right lower abdomen, right adnexa, extending to the pelvic wall upto lower end of ureter. Tumor markers were within normal limit. Intravenous pyelogram (IVP) showed mild right hydroureter and hydronephrosis with obstruction at the lower end of ureter. She was diagnosed as a case of adnexal mass with mild hydroureter & mild hydronephrosis and it was decided to operate on the patient. The surgical approach was transabdominal. On laparotomy a pseudocystic lesion 12×10cm in size was found over the right paracolic gutter and extending down into the pelvis involving the right parametrium. No abnormality was found in the uterus or tubes. The histological examination revealed a desmoid tumor of the pelvis. The patient's recovery was uneventful.
Assuntos
Fibromatose Agressiva , Hidronefrose , Neoplasias Pélvicas , Bangladesh , Feminino , Fibromatose Agressiva/complicações , Fibromatose Agressiva/cirurgia , Humanos , Hidronefrose/etiologia , Neoplasias Pélvicas/complicações , Neoplasias Pélvicas/cirurgiaRESUMO
Diabetes is common amongst patients with cancer. The co-occurrence of diabetes and cancer may lead to poorer prognosis and complications in patients undergoing cancer therapy. There is no randomized trial evidence that treating hyperglycaemia in patients with cancer improves outcomes, and therefore a pragmatic approach to managing hyperglycaemic in such patients is required. We discuss the management of hyperglycaemia in relation to cancer chemotherapy, glucocorticoids and enteral feeding. We also discuss management of glucose in diabetic patients with cancer approaching end of life care.
Assuntos
Diabetes Mellitus Tipo 1/prevenção & controle , Diabetes Mellitus Tipo 2/prevenção & controle , Hiperglicemia/prevenção & controle , Neoplasias/complicações , Antineoplásicos/efeitos adversos , Diabetes Mellitus Tipo 1/complicações , Diabetes Mellitus Tipo 2/complicações , Nutrição Enteral , Glucocorticoides/efeitos adversos , Humanos , Hiperglicemia/etiologia , Hipoglicemiantes/uso terapêutico , Neoplasias/tratamento farmacológico , Prognóstico , Assistência Terminal/métodosRESUMO
Management of diabetes is expensive and set to get costlier. Managing the condition and it's devastating complications imposing a huge societal and economic toll on healthcare systems worldwide. While many interventions to reduce complications are available, a number of interventions do not have a strong basis in evidence, and lack cost effectiveness. In a time of economic austerity, and unprecedented pressure to reduce costs of health care in the UK, are there ways improving care, without driving up cost?
Assuntos
Diabetes Mellitus Tipo 2/tratamento farmacológico , Diabetes Mellitus Tipo 2/economia , Medicina Baseada em Evidências , Custos de Cuidados de Saúde , Automonitorização da Glicemia/economia , Doenças Cardiovasculares/prevenção & controle , Análise Custo-Benefício , Diabetes Mellitus Tipo 2/complicações , Humanos , Programas de Rastreamento/organização & administração , Educação de Pacientes como Assunto , Poder Psicológico , Comportamento de Redução do Risco , Abandono do Hábito de Fumar , Padrão de CuidadoRESUMO
Diabetes and cancer are common conditions, and their co-diagnosis in the same individual is not infrequent. A link between the two conditions has been postulated for almost 80 years, but only in the past decade has significant epidemiological evidence been amassed to suggest that diabetes and cancer are associated, and the link appears causal. Hyperinsulinaemia, adipocytokines, growth factors and epigenetic changes may be implicated in the pathogenesis of cancer amongst patients with diabetes, and recently, diabetes therapies have also been implicated. There is reasonable circumstantial evidence that metformin may decrease the risk of cancer amongst diabetic patients. Much more research is required to elucidate the link between diabetes and cancer, particularly the potential link with diabetes treatments.
Assuntos
Diabetes Mellitus/epidemiologia , Neoplasias/epidemiologia , Adipocinas/metabolismo , Complicações do Diabetes , Diabetes Mellitus/tratamento farmacológico , Diabetes Mellitus/etiologia , Epigênese Genética/genética , Feminino , Humanos , Hiperinsulinismo/complicações , Hipoglicemiantes/uso terapêutico , Insulina/metabolismo , Masculino , Metformina/uso terapêutico , Neoplasias/complicações , Fatores de RiscoRESUMO
Cardiotocography (CTG) is the most commonly used test for antepartum and intrapartum foetal surveillance in the majority hospitals of developed countries. The purpose of this study was to compare the pregnancy outcome and early neonatal outcome among the normal and abnormal CTG groups. In this prospective study, fifty consecutive normal and fifty consecutive abnormal CTG were collected within one hour before delivery from patients who have singleton pregnancy with gestational age >or=32 weeks and having obstetric or medical indication for CTG. In this study, the measure of pregnancy outcomes were mode of delivery, indications of caesarean section, percentage requiring caesarean section for foetal distress, oligohydramnios, meconium stained liquor, small placenta and cord around the neck. Early neonatal outcomes included apgar score, birth weight, admission into neonatal intensive care unit (NICU), duration of stay in NICU and perinatal mortality. There were significant differences between the two groups regarding pregnancy outcomes and early neonatal outcomes. So, CTG is an important test to assess the foetal condition in both antepartum and intrapartum period. The sensitivity of CTG was 87%, specificity was 66%, positive predictive value was 54% and negative predictive value was 92% in the prediction of abnormal outcomes. So, normal CTG is more predictive of normal outcomes than abnormal CTG regarding abnormal outcomes.
Assuntos
Cardiotocografia , Resultado da Gravidez , Fatores Etários , Índice de Apgar , Cesárea , Parto Obstétrico , Feminino , Monitorização Fetal , Humanos , Mortalidade Infantil , Recém-Nascido , Unidades de Terapia Intensiva Neonatal , Tempo de Internação , Programas de Rastreamento , Vigilância da População , Gravidez , Estudos Prospectivos , Sensibilidade e Especificidade , Fatores de TempoRESUMO
BACKGROUND: South Asians have higher risk of diabetic complications compared with white Europeans. The aim of this study was to compare management of cardiovascular risk factors between Bangladeshis and white Europeans. METHODS: A retrospective survey of all diabetic patients attending an Inner London hospital diabetic clinic over one year was undertaken. Data were obtained from the hospital diabetes database: presence of macrovascular (myocardial infarction, angina, stroke, transient ischaemic attack, cardiac intervention) and microvascular disease (neuropathy, retinopathy, and nephropathy), glycated haemoglobin, blood pressure, lipids, smoking, and body mass index (BMI) were all determined. RESULTS: A total of 1162 white European and 912 Bangladeshi patients with full data available were included in the analyses. The groups were equivalent in age, sex, duration of diabetes. Compared with white Europeans, Bangladeshis had more macrovascular disease (19.5% v 11.9% p<0.01), sight threatening retinopathy (7.2% v 3.8%, p<0.01), and nephropathy (15.3% v 9.1%, p<0.01). In addition, Bangladeshis had significantly more male smokers (28.1% v 22.1%, p<0.01), poorer glycaemic control (mean HbA1c 8.6% v 8.1%, p = 0.039), greater proportion with uncontrolled hypercholesterolaemia (total cholesterol >5.0 mmol/l, 31.6% v 26% p = 0.05), and poorer control of blood pressure (proportion with BP >140/80 mm Hg, 43.2% v 32.1%, p<0.01). CONCLUSIONS: South Asians with type 2 diabetes have poorer glycaemic, blood pressure, and lipid control than white Europeans. The reasons for this are probably multifactorial.
Assuntos
Diabetes Mellitus Tipo 2/etnologia , Angiopatias Diabéticas/etnologia , Bangladesh/etnologia , Angiopatias Diabéticas/prevenção & controle , Feminino , Humanos , Londres/epidemiologia , Masculino , Microcirculação , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de RiscoRESUMO
The female population comprises 48.66% of our total population, of which 10.30% are above the age of 49, many of whom are post-menopausal. Menopause is associated with bone-loss and its consequences. Hormone replacement therapy (HRT), particularly replacement of estrogen, prevents bone-loss. We undertook this prospective case-controlled study to find out whether or not HRT is beneficial to our women. A total of 106 patients were studied, amongst them 60 were cases and 46 were controls. The women in the first group were given either conjugated equine estrogen alone (surgical menopause group) or conjugated equine estrogen plus cyclical progesterone (natural menopause group). Results showed that there was 4.29% increase in bone mineral density in women who received hormone replacement therapy (HRT). This increase was 5.23% in early and 3.56% in late menopause group. Women with natural menopause gained more bone mass (4.22%) than women with surgical menopause (3.9%). Our results also showed that women who denied HRT (controls) lost bone mass (5.26%), the loss was more in those with surgical menopause (6.24%) than those with natural menopause (4.87%). Therefore it can be concluded that post-menopausal hormone replacement therapy prevents bone-loss. However, to evaluate the beneficial effect of long-term HRT, further studies with larger samples are recommended.
Assuntos
Densidade Óssea/efeitos dos fármacos , Terapia de Reposição de Estrogênios , Bangladesh , Osso e Ossos/efeitos dos fármacos , Estudos de Casos e Controles , Estrogênios/farmacologia , Feminino , Humanos , Pessoa de Meia-Idade , Pós-Menopausa , Progesterona/farmacologia , Estudos ProspectivosAssuntos
Neoplasias Embrionárias de Células Germinativas/complicações , Neoplasias Testiculares/complicações , Tireotoxicose/etiologia , Adulto , Gonadotropina Coriônica Humana Subunidade beta/metabolismo , Humanos , Masculino , Neoplasias Embrionárias de Células Germinativas/patologia , Neoplasias Testiculares/patologia , Testes de Função Tireóidea , Tireotoxicose/metabolismoRESUMO
OBJECTIVES: To survey and compare secondary prevention measures in diabetic and non-diabetic patients following myocardial infarction (MI). DESIGN: Follow-up of a cohort of patients who suffered their first MI 1 year previously. SETTING: Three district general hospitals. MAIN OUTCOME MEASURES: Review 1 year post-MI for signs of left ventricular failure (LVF), serum cholesterol, smoking status, weight, blood pressure and glycaemic control. Assessment of appropriate treatment with aspirin, beta-blockers, angiotensin-converting enzyme (ACE) inhibitors and lipid-lowering therapy before discharge and at least 1 year post-MI. RESULTS: A total of 189 non-diabetic and 86 diabetic patients were studied. Most patients received beta-blockers and aspirin appropriately, and most gave up smoking. In non-diabetic subjects, cholesterol fell significantly (P < 0.05), as did the proportion of patients with cholesterol > 5.5 mmol L(-1) (P < 0.05), whereas cholesterol did not fall significantly in diabetic subjects, due to a lower proportion of patients being on lipid-lowering therapy (27.5 vs. 37.9%). A higher proportion of non-diabetic patients with LVF were treated with ACE inhibitors compared with diabetic subjects (73.6 vs. 61.%). Glycaemic control did not improve in the diabetic subjects. CONCLUSIONS: Patients with diabetes do not receive optimal secondary prevention measures compared with their non-diabetic counterparts. This issue needs to be addressed by all units dealing with patients with diabetes in order to reduce the mortality and morbidity of MI in such patients.
Assuntos
Complicações do Diabetes , Infarto do Miocárdio/complicações , Infarto do Miocárdio/prevenção & controle , Antagonistas Adrenérgicos beta/uso terapêutico , Idoso , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Aspirina/uso terapêutico , Glicemia/metabolismo , Diabetes Mellitus/sangue , Feminino , Seguimentos , Hospitais Gerais , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/sangue , Infarto do Miocárdio/tratamento farmacológico , Infarto do Miocárdio/etiologia , Fatores de Risco , Prevenção Secundária , Abandono do Hábito de Fumar , Redução de PesoRESUMO
OBJECTIVES: This study aims to correlate clinical, biochemical and immunological factors seen at diagnosis of thyrotoxicosis with subsequent relapse within 5 years. DESIGN: Retrospective review of case notes, and biochemical assessment at least 5 years after cessation of treatment. SETTING: A large general hospital endocrine clinic. SUBJECTS: Patients presenting with a first episode of thyrotoxicosis between 1988 and 1991 who were treated with antithyroid drugs for at least 18 months. Main outcome measures. Relapse was determined by examination of hospital records, general practice records, patient questionnaire and thyroid function tests. RESULTS: A total of 216 subjects presented for the first time with thyrotoxicosis, of whom 89 (41.2%) suffered a relapse of the disease. On univariate analysis, clinical factors associated with increased relapse include younger age at diagnosis, goitre, marked tachycardia, requirement for higher maintenance dose of carbimazole, higher FT4 levels at diagnosis and smoking. Factors not predictive of relapse include presence of thyroid eye signs, positive family history, atrial fibrillation or congestive cardiac failure, acropachy or pretibial myxoedema, and presence or absence of thyroid autoantibodies. Logistic regression analysis showed relapse was predominantly determined by an FT4 > 56.2 nmol L ', pulse rate > 110, presence of goitre and a positive smoking history (R2 = 0.36, P < 0.001). Presence of these four factors predicted relapse in 76 (85.4%) of the 89 patients who relapsed. CONCLUSIONS: Increased 'toxicity' of thyrotoxicosis, goitre and smoking are associated with relapse of thyrotoxicosis, and this may be helpful in determining which patients may be better managed with early ablative therapy.
Assuntos
Antitireóideos/uso terapêutico , Hormônios Tireóideos/sangue , Tireotoxicose/tratamento farmacológico , Tireotoxicose/fisiopatologia , Adulto , Carbimazol/uso terapêutico , Feminino , Humanos , Modelos Logísticos , Masculino , Recidiva , Estudos Retrospectivos , Testes de Função Tireóidea , Tireotoxicose/sangue , Tireotoxicose/diagnóstico , Tireotoxicose/imunologiaRESUMO
Diabetes is associated with increased mortality following acute myocardial infarction compared to the general population. Elevated glycated haemoglobin (HbA1c) in diabetic patients is also associated with increased mortality following acute myocardial infarction, while mild elevation in HbA1c are associated with impaired glucose tolerance. The aim of this study was to determine the influence of HbA1c on outcome of acute myocardial infarction in 253 non-diabetic patients, 46 of whom died in one year. In univariate analysis, risk factors for death included smoking, glucose, cholesterol and HbA1c. In logistic regression analysis HbA1c was an independent risk factor for death. Over one-third of the fatality group had an HbA1c in the highest quartile, compared to one-fifth of the surviving group (p = 0.02). Elevated HbA1c is a risk marker for short-term mortality following acute myocardial infarction in non-diabetic subjects.
Assuntos
Hemoglobinas Glicadas/análise , Infarto do Miocárdio/sangue , Infarto do Miocárdio/mortalidade , Idoso , Análise de Variância , Biomarcadores/sangue , Feminino , Intolerância à Glucose/complicações , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/etiologia , Fatores de Risco , Taxa de SobrevidaAssuntos
Hiperaldosteronismo/complicações , Obstrução da Artéria Renal/complicações , Adenoma/complicações , Adenoma/metabolismo , Neoplasias das Glândulas Suprarrenais/complicações , Neoplasias das Glândulas Suprarrenais/metabolismo , Adulto , Aldosterona/metabolismo , Feminino , Humanos , Hipertensão/etiologiaRESUMO
Some patients referred for esophagogastroduodenoscopy (EGD) to evaluate symptoms of dysphagia have normal endoscopies. How best to manage these patients is unclear. We reviewed our experience with empiric esophageal dilation in this setting. Over a five-year period, 40 consecutive patients with esophageal dysphagia and normal EGD underwent empiric esophageal dilation at the time of their endoscopy. Postdilation follow-up was available in 37 of the 40. The patients were divided into two groups depending on whether their dysphagia was to solid food only or to both solids and liquids. The two groups were comparable as regards age, sex, and the frequency of heartburn. Complete resolution of dysphagia was seen in 19 of 20 patients (95%) with solid-food-only dysphagia. In contrast, only two of 17 patients (12%) with solid and liquid dysphagia had complete resolution with empiric dilation, although another six patients (35%) had partial improvement. The difference in response between the two groups was highly significant (P < 0.0001). The response to dilation in patients with dysphagia to solid food only was often long-lasting. Most patients with dysphagia to solid food only and a normal EGD benefit from empiric esophageal dilation performed at the time of their endoscopy. In contrast, few patients with dysphagia to both solids and liquids respond.
Assuntos
Transtornos de Deglutição/terapia , Esofagoscopia , Adulto , Idoso , Idoso de 80 Anos ou mais , Transtornos de Deglutição/diagnóstico , Dilatação , Ingestão de Líquidos , Ingestão de Alimentos , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
A prospective study was carried out on 1500 patients attending the Gynaecology outpatient department of three referral hospitals in Dhaka City. These patients were selected on some selected clinical criteria to correlate several clinical markers (clinical down staging) with that of Pap's smear for early detection and secondary prevention of cancer cervix. Speculum examination and Pap's smear were done in all cases. Among 1500 women, 224 had abnormal Pap's smear. Histologic examination of specimens from these cases showed chronic cervicitis in 45 cases, dysplasia in 84 and squamous cell carcinoma in 95. Carcinoma was found in 130. Thus, there were 297 Pap's smear negative cases were biopsied on clinical ground. 225 cases of invasive carcinoma. From this study, it seems that clinical downstaging with cytology programme has to be started immediately throughout the country for diagnosis of carcinoma of the cervix in its preinvasive and potentially curable stage.