Colorectal cancer is the most commonly diagnosed cancer in the EU. Various randomised studies have shown a survival benefit with chemotherapy in the adjuvant setting. Adjuvant chemotherapy with 5-fluorouracil/folinic acid (5FU/FA) for 6 months after curatively resected node-positive colon cancer has become the standard practice. However, controversy still exists regarding the optimal regimen and whether to treat node-negative patients. The latest QUASAR trial results seem to strengthen the argument in favour of adjuvant treatment of Dukes B cancer. Patients with Dukes B tumours and any adverse prognostic indicator should be given the benefit of adjuvant therapy. A number of novel agents (oxaliplatin, irinotecan) showing activity in advanced disease are currently being evaluated in the adjuvant setting. A patient with metastatic colorectal cancer should today be expected to have a median survival of 18–20 months compared to that of 11–14 months only a few years ago. 5FU/FA has been the mainstay of therapy for metastatic colorectal cancer for over 40 years and confers a survival benefit over supportive care. The response rate of 5FU is improved by modulation with FA or by continuous infusional regimens (currently the best expected response rate is around 20–25%). As per the recent National Institute for Clinical Excellence guidelines, the oral agents capecitabine or tegafur with uracil (in combination with FA) can be used as first-line treatment in metastatic colorectal cancer and, although their response rate has not been directly compared to infusional 5FU, survival is unlikely to be inferior. Newer chemotherapeutic agents like irinotecan and oxaliplatin are now entering regular usage due to improved response rates (around 50% in 5FU/FA-containing doublets) and survival. Irinotecan monotherapy is second-line treatment approved by the National Institute for Clinical Excellence, although sequential infusional 5FU/FA irinotecan to infusional 5FU/FA oxaliplatin may convey the best survival with the least side effects. The position of combination chemotherapy before (to downstage) or after metastasectomy (usually from the liver) is still a topic of heated debate. Other routes (intrahepatic, intraperitoneal) are still to be proven and not recommendable outside the trial setting. The latest results of chemotherapy combinations with biological treatments (bevacuzimab and cetuximab) have been very promising indeed. Further improvements in survival, response and quality of life are expected.
Superior vena cava syndrome is referred to as a constellation of symptoms and signs caused by obstruction of superior vena cava. It can occur due to both benign and malignant causes with the latter being the predominant. There is a paradigm shift in the approach to manage this condition. It is no longer considered a medical emergency and histological diagnosis is necessary before treatment. This article reviews the causes, symptoms, pathophysiology, and overall management policy which have changed over decades.
It is generally accepted that the quality of myocardial images deteriorates with increasing patient weight. This is attributed to a reduction of counts detected from the myocardium. In this paper we have looked at the count reduction in obese patients and suggest a workable algorithm to increase the injected activity to compensate for this loss of count. In this prospective study, 64 consecutive patients with normal myocardial images were selected to include a weight range of 50-120 kg. The height, weight and gender of patients were noted. Each patient had two studies (total of 128 studies), one at rest and one following stress with adenosine and 20-40 W bicycle exercise. Total myocardial counts were calculated from the back-projected views. The total myocardial counts per MBq of the injected activity were calculated. There was no significant difference in the injected activity and the size of the heart (pixel length of heart) between stress and rest, or gender of the patient. The normalized myocardial counts were not different between men and women, but the counts were slightly, although not significantly, higher ( P=NS) with adenosine and exercise (mean of 243 x 10(3) counts) compared to rest images (229 x 10(3) counts). There was a significant progressive loss of counts in patients with increasing weight, body mass index or body surface area ( P<0.001). There was no significant difference in the changes in counts with weight between male and female, or rest and stress studies. The combined data from all the studies were used to calculate the correlation coefficient and the slope of the line for reduction of cardiac counts with a patient's weight, body mass index, and body surface area. The best correlation was with patient weight ( r=0.58, P<0.001). This was used to calculate the increase in injection activity with increasing weight to maintain the same average counts as achieved in a 70 kg patient with a 400 MBq injection. We suggest that the injection activity should increase from 100% for a 70 kg patient to 140% for 110 kg, 200% for 140 kg, and 250% for a 150 kg patient.
< .0001) as well as T1-T2 tumors, age < 60y, male gender and lower comorbidity scores. In propensity matched subgroups, 2.12 Gy fraction size was associated with improved survival compared to 1.8 Gy fraction sizes (HR 1.37, 95% CI 1.05-1.79, P Z .02) but did not reach statistical significance for 2 Gy fraction sizes (HR 1.16, 95% CI 1.00-1.35, P Z .05). Conclusion: Fraction sizes of 2.12 Gy were associated with improved OS compared to 1.8 and 2 Gy fraction sizes in nasopharynx and oropharynx cancers treated with chemoradiation. These results suggest that some slightly hypofractionated regimens improve survival for certain LA-HNSCCs.
Lung cancer is the world’s leading cause of cancer-related deaths. Epidermal growth factor receptor (EGFR) is one of the critical oncogenes and plays a significant role in tumor proliferation and metastasis. Patients with sensitizing mutations in the EGFR gene have better clinical outcomes when treated with tyrosine kinase inhibitors (TKI). This study expands our knowledge of the spectrum of EGFR mutations among lung cancer patients in the Indian scenario. This is a retrospective descriptive study of all newly diagnosed patients with lung cancer in tertiary care hospital in India. All the samples were subjected to real-time PCR (q-PCR) analysis and confirmation of rare novel mutations was done using Sanger sequencing. Clinicopathological characteristics, mutational EGFR status, and location on the exon and metastatic sites were evaluated. An analysis of total 212 samples showed mutations in 38.67% of cases. Among these, five (5.9%) samples had mutations in exon 18, 41 (48.8%) samples had mutations in exon 19, 12 (14.28%) samples had mutations in exon 20, and 26 (30.95%) samples had mutations in exon 21. Eleven (13.41%) were found to be uncommon EGFR mutations. Additionally, six (21.4%) samples that had EGFR mutations were also positive for brain metastasis. Future testing on bigger panels will help to characterize the incidence of genetic mutations and to determine the appropriate targeted treatment choices for NSCLC patients.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.