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<recommendedContent xmlns="http://api.mspoke.com">
    <recommendedItem id="20100101_19_413"
                     title="ICAO: In Obesity, Fat Legs Better than Fat Middles (CME/CE)"
                     score="0.012"
                     href="http://www.medpagetoday.com/PrimaryCare/Obesity/tb/18322?impressionId=1265755018919"
                     
      Having less abdominal fat but more leg fat may play a role in maintaining metabolic health in obese women, but not in heavy men, researchers found.&lt;br&gt;
&lt;br&gt;Metabolically healthy obese women had significantly more leg fat compared with metabolically unfit women, and smaller waist circumference (&lt;em&gt;P&lt;/em&gt;&amp;lt;0.05), Sarah Appleton, a postgraduate student at the University of Adelaide in Australia, and colleagues reported at the International Congress on Abdominal Obesity in Hong Kong.&lt;br&gt;
&lt;br&gt;When there&apos;s no significant differences in total body fat, the high levels of leg fat but low levels of central fat &quot;makes you think this is a protective factor against developing metabolic complications of their obesity, including diabetes,&quot; Appleton told &lt;em&gt;MedPage Today&lt;/em&gt;.&lt;/p&gt;
&lt;p&gt;Smaller studies have shown that metabolically healthy obese patients have less visceral fat compared with insulin-resistant obese patients, suggesting these may be protective factors that limit the development of metabolic disease.&lt;/p&gt;
&lt;p&gt;On the other hand, normal-weight patients with cardiometabolic risk factors, who are labeled as &quot;metabolically obese,&quot; have higher abdominal adiposity compared with metabolically healthy normal-weight patients. They&apos;re also at increased risk for diabetes and heart disease.&lt;/p&gt;
&lt;p&gt;To examine the relationship, the researchers conducted dual energy X-ray absorptiometry (DEXA) scans of body composition in 1,604 patients who were over age 50 and participated in the North West Adelaide Health Study. They were stratified in four categories: metabolically obese normal-weight, metabolically healthy normal weight, metabolically healthy obese, and metabolically unfit obese.&lt;/p&gt;
&lt;p&gt;Metabolic obesity was defined by having two or more metabolic risk factors including high triglycerides, low HDL cholesterol, high blood pressure, high fasting plasma glucose, or diabetes.&lt;/p&gt;
&lt;p&gt;The researchers also measured waist circumference.&lt;/p&gt;
&lt;p&gt;They found that among normal-weight women, the metabolically obese had significantly more total fat and more trunk fat compared with those who were metabolically healthy (&lt;em&gt;P&lt;/em&gt;&amp;lt;0.05). There were no differences in waist circumference or lean mass.&lt;/p&gt;
&lt;p&gt;Among obese women, the metabolically healthy had no significant differences in total body fat, compared with the metabolically unfit. But they had significantly more leg fat, a smaller waist circumference, and the same amounts of lean mass.&lt;/p&gt;
&lt;p&gt;&quot;We would have expected to see that metabolically healthy obese ladies would have more leg fat, but also more lean mass and less central fat, since this combination is protective against developing diabetes,&quot; Appleton said, &quot;but we didn&apos;t see that related to lean mass, which was surprising.&quot;&lt;/p&gt;
&lt;p&gt;Normal-weight men who had metabolic problems had significantly more total fat and trunk (chest and abdominal) fat than metabolically healthy ones, but no differences in lean mass.&lt;/p&gt;
&lt;p&gt;And for obese men, there were no significant differences between the metabolically fit and unfit, which &quot;was a surprise,&quot; Appleton said.&lt;/p&gt;
&lt;p&gt;&quot;Men generally have much less fat and more lean mass,&quot; she added. &quot;Women are the other way around, so maybe it&apos;s not so surprising to see these effects specifically in women.&quot;&lt;/p&gt;
&lt;p&gt;The researchers did find that among all overweight patients, both male and female, metabolic health was associated with significantly lower waist circumference.&lt;/p&gt;
&lt;p&gt;&quot;We know specifically that fat around the abdomen is dangerous because it can drain into your blood very easily and have direct effects on organs including the liver and pancreas,&quot; Appleton said. &quot;The theory is that distribution of fat and maybe an alternative inflammatory profile protects obese ladies from developing the metabolic consequences you&apos;d expect to see in people who are obese.&quot;&lt;/p&gt;
&lt;p&gt;Appleton said the study may have implications for clinical practice, adding that physicians should assess both BMI and waist circumference to determine disease risk. Moreover, physicians &quot;need to focus on healthy weight loss in a way that protects lean mass but also reduces dangerous fat deposits including central adiposity.&quot;&lt;/p&gt;
&lt;p&gt;It also goes to show that &quot;just because somebody looks thin,&quot; Appleton added, &quot;doesn&apos;t mean they&apos;re healthy.&quot;&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;The researchers reported no conflicts of interest.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
    </recommendedItem>
    <recommendedItem id="20100101_19_318"
                     title="Preop CT May Reduce Unnecessary Appendectomy (CME/CE)"
                     score="0.004"
                     href="http://www.medpagetoday.com/Surgery/GeneralSurgery/tb/18185?impressionId=1265755018919"
                     
      Using computed tomography (CT) to diagnose appendicitis may reduce the likelihood of removing healthy organs in women under 45, but not among other groups, a retrospective study showed.&lt;br&gt;
&lt;br&gt;Over a 10-year period, the use of preoperative CT increased from 18.5% of patients who ultimately had their appendices removed to 94.2% (&lt;em&gt;P&lt;/em&gt;&amp;lt;0.00001), according to Courtney Coursey, MD, of Duke University Medical Centeri, and colleagues.&lt;br&gt;
&lt;br&gt;During the same time period, the rate of negative appendectomy (removal of a healthy organ) declined, although the trend was significant only among women 45 and younger (&lt;em&gt;P&lt;/em&gt;=0.0001), the researchers reported in the February issue of &lt;em&gt;Radiology&lt;/em&gt;.&lt;/p&gt;
&lt;p&gt;&quot;We believe our study . . . supports the use of preoperative CT, particularly in the evaluation of women of reproductive age suspected of having acute appendicitis,&quot; they wrote.&lt;/p&gt;
&lt;p&gt;They acknowledged the radiation risk and potential overuse of CT scans, but concluded, &quot;We believe that the risk of unnecessary surgery justifies the use of CT in patients in whom the clinical diagnosis of appendicitis is uncertain.&quot;&lt;/p&gt;
&lt;p&gt;Previous studies looking at the link between the use of preoperative CT and the negative appendectomy rate have yielded mixed results.&lt;/p&gt;
&lt;p&gt;So Coursey and her colleagues looked at the relationship using data from 1998 to 2007 for 925 adult patients who underwent an appendectomy at Duke. Two-thirds had a preoperative CT no more than 48 hours before surgery.&lt;/p&gt;
&lt;p&gt;Although the overall negative appendectomy fell by nearly half during the study (16.7% to 8.7%, &lt;em&gt;P&lt;/em&gt;&amp;lt;0.0001), it was driven almost entirely by a reduction among women 45 and younger (42.9% to 7.1%, &lt;em&gt;P&lt;/em&gt;=0.0001).&lt;/p&gt;
&lt;p&gt;&quot;However, the timing of the decline in negative appendectomy rates for women 45 years and younger could not be proved to be associated with the increase in CT use,&quot; the researchers noted.&lt;/p&gt;
&lt;p&gt;There were no significant trends in older women or in men of any age.&lt;/p&gt;
&lt;p&gt;&quot;The lack of a decline in the negative appendectomy rates for men and women older than 45 years may be a consequence of the initially low rates resulting in low power,&quot; the authors wrote.&lt;/p&gt;
&lt;p&gt;During the study, false-negative CT scans ranged from 0% to 20%, with lower rates in the later years of the study.&lt;/p&gt;
&lt;p&gt;False-positive scans fluctuated between 1.7% to 10%. A drop in rates of false-positive scans was associated with advances in CT technology.&lt;/p&gt;
&lt;p&gt;The researchers noted some limitations of the study, including the retrospective design and the failure to evaluate the effect of CT detector configuration on diagnostic performance.&lt;/p&gt;
&lt;p&gt;In addition, they wrote, the measure of CT use to diagnose appendicitis was biased because the analysis excluded cases in which CT had ruled out appendicitis.&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;One of Coursey&apos;s co-authors is a consultant to GE Healthcare.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
    </recommendedItem>
    <recommendedItem id="20100101_19_304"
                     title="&apos;Virtual&apos; Colon Scans Effective in Seniors (CME/CE)"
                     score="0.003"
                     href="http://www.medpagetoday.com/HematologyOncology/ColonCancer/tb/18164?impressionId=1265755018919"
                     
      Patients 65 and older are as suitable as younger individuals for CT colonography, said researchers conducting a large retrospective study.&lt;br&gt;
&lt;br&gt;Advanced neoplasias were detected with CT colonography  --  often called &quot;virtual colonoscopy&quot;  --  in older patients at more than double the rate in the general screening population, reported David H. Kim, MD, of the University of Wisconsin in Madison, Wis., and colleagues in the February issue of &lt;em&gt;Radiology&lt;/em&gt;.&lt;br&gt;
&lt;br&gt;They found that 7.6% of older patients had advanced neoplasias, compared with 3.2% of all patients screened in the university&apos;s clinic (&lt;em&gt;P&lt;/em&gt;&amp;lt;0.001).&lt;/p&gt;
&lt;p&gt;On the basis of this and other findings in 577 individuals 65 and older versus the entire group of 3,120 patients undergoing the procedure, Kim and colleagues concluded that &quot;CT colonography performance is maintained in an older cohort.&quot;&lt;/p&gt;
&lt;p&gt;&quot;Overall, the observations from this clinical experience confirm that CT colonography may be a valuable screening modality in the older population,&quot; they wrote.&lt;/p&gt;
&lt;p&gt;On the other hand, the study did not address several objections raised by the Centers for Medicare and Medicaid Services (CMS) in its decision last year to deny Medicare coverage for the procedure. (See &lt;a href=&quot;http://www.medpagetoday.com/PublicHealthPolicy/Medicare/14186&quot; mce_href=&quot;http://www.medpagetoday.com/PublicHealthPolicy/Medicare/14186&quot; target=&quot;_blank&quot;&gt;Medicare Finalizes Denial of Virtual Colonoscopy Coverage&lt;/a&gt;)&lt;/p&gt;
&lt;p&gt;CMS had pointed to relatively low sensitivity of CT colonography compared with optical colonoscopy in prospective trials, especially for small lesions.&lt;/p&gt;
&lt;p&gt;The agency also determined that CT colonography increased the costs of positive findings, since abnormalities in the CT scans must be confirmed with optical colonoscopy. In addition, CMS said there was no evidence to support claims that the less invasive imaging procedure would be more acceptable to patients and therefore would raise screening rates.&lt;/p&gt;
&lt;p&gt;The data analyzed by Kim and colleagues did not allow for calculations of false-negative rates or predictive values of positive or negative findings. Nor did the researchers report cost information.&lt;/p&gt;
&lt;p&gt;Mean age of their older cohort was 69.2 (SD 3.8). The oldest was 79.&lt;/p&gt;
&lt;p&gt;The researchers reported that 15.3% of the older patients were referred for optical colonoscopy on the basis of the CT results, compared with 7.9% of the overall screening group.&lt;/p&gt;
&lt;p&gt;Less than 4% of positive findings were determined to be false with the optical procedure (3.6% for polyps 6 to 10 mm in diameter, 2.1% for larger lesions).&lt;/p&gt;
&lt;p&gt;Of the 59 advanced neoplasias identified in the older patients, all but three were at least 10 mm in size.&lt;/p&gt;
&lt;p&gt;The scans also suggested abnormalities outside the colon in 89 (15.4%) patients. Of these, 45 received a full workup, which revealed substantial and previously unsuspected diagnoses in 21 cases  -- 18 were vascular aneurysms. The other three included one lung tumor, a femoral hernia, and a malrotation.&lt;/p&gt;
&lt;p&gt;Kim and colleagues reported that no &quot;substantial complications&quot; such as perforations or major hemorrhage occurred in the older patients, either with the CT scan or follow-up colonoscopy.&lt;/p&gt;
&lt;p&gt;They also indicated that the ratio of large to small neoplasias was similar in the older patients compared with their CT screening group as a whole. Histologic and morphologic findings were similar as well.&lt;/p&gt;
&lt;p&gt;The researchers cited the observational nature of the study, in which negative findings were not corroborated with optical colonoscopy, and its restriction to a single center as its main limitations.&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;No external funding for the study was reported.&lt;/p&gt;&lt;p&gt;Kim and one co-author reported relationships with Viatronix and Medicsight and are co-founders of a company called VirtuoCTC, which produces educational materials on CT colonography.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
    </recommendedItem>
    <recommendedItem id="20100101_19_246"
                     title="Program Cuts Excess Radiation Exposure (CME/CE)"
                     score="-0.002"
                     href="http://www.medpagetoday.com/Radiology/DiagnosticRadiology/tb/18103?impressionId=1265755018919"
                     
      &lt;p&gt;A New York medical center substantially reduced diagnostic radiation doses with an education program and clinical algorithm to promote ventilation-perfusion scanning in lieu of CT pulmonary angiography for detecting pulmonary embolism, researchers said.&lt;/p&gt;
&lt;p&gt;After the program&apos;s introduction at Montefiore Medical Center in the Bronx, the annual number of CT pulmonary angiography scans performed fell by 25%, Evan G. Stein, MD, PhD, and others at Montefiore reported in the February issue of the &lt;em&gt;American Journal of Roentgenology&lt;/em&gt;.&lt;/p&gt;
&lt;p&gt;The average radiation dose in about 2,000 patients evaluated annually for possible pulmonary embolism also decreased by 20%, the researchers said in their report.&lt;/p&gt;
&lt;p&gt;They also indicated that the program did not sacrifice accuracy. Rates of false negative findings  --  determined by diagnosis of subsequent thromboembolism within 90 days  --  remained in a range of 0.8% to 1.2% both before and after the program was implemented.&lt;/p&gt;
&lt;p&gt;&quot;A simple algorithm, based on results of chest radiography, can successfully change the practice pattern for imaging emergency department patients with suspected pulmonary embolism and reduce radiation exposure without compromising patient safety,&quot; Stein and colleagues concluded.&lt;/p&gt;
&lt;p&gt;Officials at Montefiore conceived the program as part of a national effort to reduce radiation exposure from diagnostic imaging. Exposure has soared in recent decades with the widespread adoption of CT scanning as a second-line or even primary diagnostic method for many patients.&lt;/p&gt;
&lt;p&gt;Stein and colleagues cited data indicating that the average per-capita medical radiation dose in the U.S. increased sixfold from 1980 to 2006.&lt;/p&gt;
&lt;p&gt;Before the move to CT imaging, they noted, ventilation-perfusion scanning was the standard for detecting pulmonary embolism. It also involves radiography, but the total dose is about one-fifth as high as CT pulmonary angiography.&lt;/p&gt;
&lt;p&gt;In particular, CT delivers 20 to 40 times as much radiation to women&apos;s breasts as ventilation-perfusion images, they added.&lt;/p&gt;
&lt;p&gt;Consequently, the hospital held a series of collaborative seminars for its radiology, nuclear medicine, and emergency departments, providing information about the accuracy of ventilation-perfusion imaging versus CT pulmonary angiography.&lt;/p&gt;
&lt;p&gt;Montefiore also established a clinical algorithm for determining when to use these methods.&lt;/p&gt;
&lt;p&gt;It called for all patients with suspected pulmonary embolism to receive an initial chest x-ray. If it was negative for pleural or parenchymal disease, patients would receive ventilation-perfusion imaging. Conversely, positive findings for pleural or parenchymal disease would qualify the patient for CT pulmonary angiography.&lt;/p&gt;
&lt;p&gt;Patients with equivocal results on either of these tests would then receive the other one.&lt;/p&gt;
&lt;p&gt;The algorithm was introduced in December 2006, along with an education program, which continued into the following month.&lt;/p&gt;
&lt;p&gt;Before the intervention, the proportion of evaluations conducted with CT imaging hovered around 60%. It fell to 50% from January to March 2007, and from June to December 2007 it stabilized at about 40%.&lt;/p&gt;
&lt;p&gt;Mean radiation doses delivered to patients had averaged 8.0 mSv in 2006. In 2007, the mean dose was 6.4 mSv (&lt;em&gt;P&lt;/em&gt;&amp;lt;0.0001), Stein and colleagues reported.&lt;/p&gt;
&lt;p&gt;There was no notable change after the intervention in rates of positive, negative, and indeterminate findings with either method.&lt;/p&gt;
&lt;p&gt;Stein and colleagues found that patients who qualified for ventilation-perfusion imaging under the algorithm were significantly younger and more likely to be female than those assigned to CT pulmonary angiography.&lt;/p&gt;
&lt;p&gt;Patients receiving the CT scans also were more likely to die within 90 days, both before and after the intervention. The 90-day mortality rate increased in 2007 relative to 2006 (from 9.4% to 14.1%, &lt;em&gt;P&lt;/em&gt;&amp;lt;0.0001) for patients undergoing the CT imaging. This is not surprising, since the algorithm called for CT mainly in patients with more severe lung disease.&lt;/p&gt;
&lt;p&gt;The researchers indicated that objective clinical assessments and D-dimer testing could further reduce the number of patients exposed to either CT pulmonary angiography or ventilation-perfusion testing. These were not used during the study period, which was a limitation of the analysis.&lt;/p&gt;
&lt;p&gt;Another limitation was that recurrent thromboembolism was determined only for patients who returned to Montefiore for treatment, meaning the study may have underestimated the false-negative rates. Its retrospective, single-center design may also limit the generalizability.&lt;/p&gt;
&lt;p&gt;In addition, ventilation-perfusion testing was available around-the-clock in this institution, which is not generally the case around the country.&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;No external funding for the study was reported.&lt;/p&gt;&lt;p&gt;No potential conflicts of interest were reported.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
    </recommendedItem>
    <recommendedItem id="20100101_19_242"
                     title="Ultrasound Aids Early Ovarian Cancer Detection (CME/CE)"
                     score="-0.003"
                     href="http://www.medpagetoday.com/Radiology/DiagnosticRadiology/tb/18096?impressionId=1265755018919"
                     
      &lt;p&gt;Serum biomarkers identified through proteomic analysis, coupled with contrast-enhanced ultrasound, ultimately may provide a means for early diagnosis of ovarian cancer, researchers say.&lt;/p&gt;
&lt;p&gt;&quot;Exciting preliminary data have shown that specific combinations of peptides from molecules, such as &lt;em&gt;BRCA2&lt;/em&gt;, exist in the serum of epithelial ovarian cancer patients,&quot; Sonia Dutta, MD, of Mount Sinai School of Medicine in New York, and colleagues reported in the February&lt;em&gt; American Journal of Roentgenology&lt;/em&gt;.&lt;/p&gt;
&lt;p&gt;This discovery suggests that &quot;highly discriminatory proteins&quot; may serve as biomarkers for early epithelial cell ovarian cancer, although the findings must be further validated, the authors wrote.&lt;/p&gt;
&lt;p&gt;Despite advances in surgery and chemotherapy, survival from advanced stage ovarian cancer is only 30%, and the authors cite a &quot;dire need&quot; for a validated screening method to detect the disease early.&lt;/p&gt;
&lt;p&gt;Unsuccessful efforts find a biomarker for this deadly malignancy have focused primarily on a single cancer-specific marker, which the authors concede is a &quot;mission impossible.&quot;&lt;/p&gt;
&lt;p&gt;Impediments to the identification of cancer-specific markers include the molecular heterogeneity that characterizes different tumors, the sharing of pathophysiologic events among cancer and other diseases, and low marker production and concentration.&lt;/p&gt;
&lt;p&gt;To overcome these difficulties, a new approach known as proteomics is being used to analyze the entire protein complement of a cell.&lt;/p&gt;
&lt;p&gt;The rationale for this analytical technique lies in a significantly greater understanding of the tumor microenvironment. It is now known that tumor cells participate in complex interactions with surrounding structures and other cell populations.&lt;/p&gt;
&lt;p&gt;&quot;This biochemical cross-talk is hypothesized to generate a cascade of specific and sensitive biomarkers elaborated directly from the tumor cell population, indirectly from the interacting non-tumor cells or extracellular molecules, or a specific product of the microecology,&quot; they explained.&lt;/p&gt;
&lt;p&gt;In fact, the most specific cancer markers may turn out to be molecules that normally are not malignant but that have been modified by that tumor microenvironment  --  clipped, cleaved, phosphorylated, or glycosylated  --  and carry a detailed picture of the local pathophysiology.&lt;/p&gt;
&lt;p&gt;Previous techniques used in the hunt for markers, such as two-dimensional gel electrophoresis, were unable to detect these altered or clipped molecules, which occupy the low molecular weight range of the proteome.&lt;/p&gt;
&lt;p&gt;Mass spectrometry, which is most sensitive in the low molecular weight range, is now a tool used to explore these modified protein molecules and has already revealed a vast number of previously unknown biomarkers.&lt;/p&gt;
&lt;p&gt;The next steps, the researchers explained, will be to develop capture reagents that can measure the markers and, using reverse-phase protein array, to further characterize proteins of interest.&lt;/p&gt;
&lt;p&gt;But any diagnostic information gained through proteomic analysis must be verified by some imaging technique. Conventional ultrasound has proven inadequate, but pulse-inversion harmonic ultrasound currently appears to differentiate malignant from benign lesions.&lt;/p&gt;
&lt;p&gt;For example, although the time to peak enhancement with contrast-enhanced ultrasound is similar in benign and malignant masses, a small study found that malignant lesions have: &lt;ul&gt; &lt;li&gt;Greater peak enhancement (23.3 versus 12.3 dB, &lt;em&gt;P&lt;/em&gt;&amp;lt;0.01)&lt;/li&gt; &lt;li&gt;Longer half wash-out time (139.9 versus 46.3 seconds, &lt;em&gt;P&lt;/em&gt;&amp;lt;0.01)&lt;/li&gt; &lt;li&gt;Greater area under the enhancement curve (2,012.9 versus 523.9 seconds, &lt;em&gt;P&lt;/em&gt;=0.07)&lt;/li&gt; &lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;The authors noted that these enhancement kinetics data were from just 17 patients and are therefore limited, but stated that the technique &quot;shows great promise.&quot;&lt;/p&gt;
&lt;p&gt;In addition, the diagnostic capacity of ultrasound can be further increased by the use of intravenous contrast agents, which may help visualize the early microvascular changes typical of malignancy.&lt;/p&gt;
&lt;p&gt;The researchers predicted that, by using a combination of clinically relevant biomarkers identified through proteomic analyses plus contrast-enhanced ultrasound, &quot;we will likely be able to shift from an era of diagnosing advanced-stage ovarian cancer to that of early-stage disease and, most important, save the lives of many women.&quot;&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;No disclosures were provided.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
    </recommendedItem>
</recommendedContent>