Medical group urges new rules on radiation

Source: nytimes.com Author: Walt Bogdanich The leading professional organization dedicated to radiation oncology has called for enhanced safety measures in administering medical radiation, including the establishment of the nation’s first central database for the reporting of errors involving linear accelerators — machines that generate radiation — and CT scanners. The group, the American Society for Radiation Oncology, or Astro, issued a six-point plan on Wednesday that it said would improve safety and quality and reduce the chances of medical errors. Even though the group says serious radiation accidents are rare, it says it will work toward a stronger accreditation program, expanded training, and an enhanced program to ensure that medical technologies from different manufacturers can safely transfer information. Astro will also press for federal legislation to require national standards for radiation therapy treatment teams, along with additional resources for the Radiological Physics Center, a federally financed group that evaluates the safety of treatments. Dr. Anthony L. Zietman, professor of radiation oncology at Harvard Medical School and Astro’s president, said the goal was to “take measures that are currently in existence, recognize them and then work to strengthen them and above all work to reassure patients.” The group said it began a comprehensive review of existing policies last week after two articles in The New York Times reported on the harm that can result when powerful and technologically complex machines go awry and when basic safety procedures are not followed. The articles reported that medical personnel who work with the new [...]

2010-02-05T22:29:56-07:00February, 2010|Oral Cancer News|

HPV-associated base of tongue squamous cell carcinoma incidence increasing in Sweden

Source: www.hemonctoday.com Author: staff The incidence for base of tongue squamous cell carcinoma increased significantly in Sweden between 1998 and 2007, and by 2007, more than 80% of these cases were HPV-positive. Various studies during the past 20 years have indicated that HPV is a risk factor for oropharyngeal cancer. However, few studies have assessed the specific sub-sites of the oropharynx. In this study, researchers assessed the increased incidence of base of tongue cancer and the association of HPV in 109 patients diagnosed with base of tongue cancer between 1998 and 2007 in Stockholm, Sweden. The researchers obtained diagnostic pretreatment paraffin-embedded tumor biopsies from 95 patients. DNA samples were obtained from 30-mcm paraffin-embedded base of tongue biopsy slices. Age at diagnosis ranged from 41 to 85 years. From 1970 to 2007, the age-standardized incidence of base of tongue squamous cell carcinoma increased from 0.15 per 100,000 person-years between 1970 and 1974 to 0.47 per 100,000 person-years between 2005 and 2007. HPV DNA was found in 75% of base of tongue cancer cases during this time. Of the HPV-positive tumors, 86% were HPV-16–positive and seven were HPV-33–positive. During the study period, the incidence of HPV-positive base of tongue cancers persistently increased (see chart). A significant increase was found in the proportion of HPV-positive cancer between 1998 and 2001 compared with 2004 and 2007 (58% vs. 84%; P<.05). When compared with patients with HPV-negative tumors, patients with HPV-positive tumors were likely to be stage IV (P<.02) and had less advanced T-stage (P<.05 [...]

2010-02-05T22:20:41-07:00February, 2010|Oral Cancer News|
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