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{\u0022basePath\u0022:\u0022\\\/\u0022,\u0022pathPrefix\u0022:\u0022\u0022,\u0022highwire\u0022:{\u0022markup\u0022:[{\u0022requested\u0022:\u0022full-text\u0022,\u0022variant\u0022:\u0022full-text\u0022,\u0022view\u0022:\u0022full\u0022,\u0022pisa\u0022:\u0022spmdc;8\\\/1\\\/25\u0022},{\u0022requested\u0022:\u0022long\u0022,\u0022variant\u0022:\u0022full-text\u0022,\u0022view\u0022:\u0022full\u0022,\u0022pisa\u0022:\u0022spmdc;8\\\/1\\\/25\u0022}],\u0022ac\u0022:{\u0022spmdc;8\\\/1\\\/25\u0022:{\u0022access\u0022:{\u0022reprint\u0022:true,\u0022full\u0022:true},\u0022pisa_id\u0022:\u0022spmdc;8\\\/1\\\/25\u0022,\u0022atom_uri\u0022:\u0022\u0022,\u0022jcode\u0022:\u0022spmdc\u0022}}},\u0022googleanalytics\u0022:{\u0022trackOutbound\u0022:1,\u0022trackMailto\u0022:1,\u0022trackDownload\u0022:1,\u0022trackDownloadExtensions\u0022:\u00227z|aac|arc|arj|asf|asx|avi|bin|csv|doc(x|m)?|dot(x|m)?|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|msi|msp|pdf|phps|png|ppt(x|m)?|pot(x|m)?|pps(x|m)?|ppam|sld(x|m)?|thmx|qtm?|ra(m|r)?|sea|sit|tar|tgz|torrent|txt|wav|wma|wmv|wpd|xls(x|m|b)?|xlt(x|m)|xlam|xml|z|zip\u0022,\u0022trackUrlFragments\u0022:1},\u0022ajaxPageState\u0022:{\u0022js\u0022:{\u0022sites\\\/all\\\/libraries\\\/cluetip\\\/jquery.cluetip.js\u0022:1,\u0022sites\\\/all\\\/libraries\\\/cluetip\\\/lib\\\/jquery.hoverIntent.js\u0022:1,\u0022sites\\\/all\\\/libraries\\\/cluetip\\\/lib\\\/jquery.bgiframe.min.js\u0022:1,\u0022sites\\\/all\\\/modules\\\/highwire\\\/highwire\\\/plugins\\\/highwire_markup_process\\\/js\\\/highwire_at_symbol.js\u0022:1,\u0022sites\\\/all\\\/modules\\\/highwire\\\/highwire\\\/plugins\\\/highwire_markup_process\\\/js\\\/highwire_article_reference_popup.js\u0022:1,\u0022sites\\\/all\\\/modules\\\/contrib\\\/google_analytics\\\/googleanalytics.js\u0022:1,\u00220\u0022:1}}});\n\/\/--\u003E\u003C!]]\u003E\n\u003C\/script\u003E\n\u003Clink type=\u0022text\/css\u0022 rel=\u0022stylesheet\u0022 href=\u0022\/\/d282kpwvnogo5m.cloudfront.net\/sites\/default\/files\/cdn\/css\/http\/css_Xg7z6oCTVgud_Q0huYz9x9iiD5H_2YPSJ5z2ZViSWdY.css\u0022 media=\u0022all\u0022 \/\u003E\n\u003Clink rel=\u0027stylesheet\u0027 type=\u0027text\/css\u0027 href=\u0027\/sites\/all\/modules\/contrib\/panels\/plugins\/layouts\/onecol\/onecol.css\u0027 \/\u003E\u003C\/head\u003E\u003Cbody\u003E\u003Cdiv class=\u0022panels-ajax-tab-panel panels-ajax-tab-panel-sageoa-tab-art\u0022\u003E\u003Cdiv class=\u0022panel-display panel-1col clearfix\u0022 \u003E\n  \u003Cdiv class=\u0022panel-panel panel-col\u0022\u003E\n    \u003Cdiv\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-markup\u0022 \u003E\n  \n      \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022highwire-markup\u0022\u003E\u003Cdiv xmlns=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022 id=\u0022content-block-markup\u0022 xmlns:xhtml=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022\u003E\u003Cdiv class=\u0022article fulltext-view \u0022\u003E\u003Cspan class=\u0022highwire-journal-article-marker-start\u0022\u003E\u003C\/span\u003E\u003Cdiv class=\u0022section abstract\u0022 id=\u0022abstract-1\u0022\u003E\u003Ch2\u003ESummary\u003C\/h2\u003E\n            \u003Cp id=\u0022p-1\u0022\u003EThe reported incidence of all types of stroke in childhood is relatively low, with 2.6 occurring per 100,000 white children and 3.1 per 100,000 in black children [Broderick et al. \u003Cem\u003EChild Neurol\u003C\/em\u003E 1993]. However, additional analyses indicate that children with sickle cell disease (SCD) face a huge relative risk of ischemic stroke compared with a healthy population (RR=220) [Earley et al. \u003Cem\u003ENeurology\u003C\/em\u003E 1998]. Chronic blood transfusion therapy has been employed as secondary prevention of stroke in patients with SCD for over 30 years\u003C\/p\u003E\n         \u003C\/div\u003E\u003Cul class=\u0022kwd-group\u0022\u003E\u003Cli class=\u0022kwd\u0022\u003Ecerebrovascular disease\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003Eanemias\u003C\/li\u003E\u003C\/ul\u003E\u003Cdiv class=\u0022section\u0022 id=\u0022sec-1\u0022\u003E\n         \n         \u003Cp id=\u0022p-2\u0022\u003EThe reported incidence of all types of stroke in childhood is relatively low, with 2.6 occurring per 100,000 white children and 3.1 per 100,000 in black children (Broderick et al. \u003Cem\u003EChild Neurol\u003C\/em\u003E 1993). However, additional analyses indicate that children with sickle cell disease (SCD) face a huge relative risk of ischemic stroke compared with a healthy population (RR=220; Earley et al. \u003Cem\u003ENeurology\u003C\/em\u003E 1998). Chronic blood transfusion therapy has been employed as secondary prevention of stroke in patients with SCD for over 30 years. This session discussed the epidemiology of SCD as well as the risks and benefits of using chronic transfusion therapy in primary stroke prevention.\u003C\/p\u003E\n         \u003Cp id=\u0022p-3\u0022\u003ERobert J. Adams, MD, Medical University of South Carolina, Charleston, SC, gave an overview of the Stroke Prevention Trial in Sickle Cell Anemia (STOP). Transfusion of every child with SCD is not warranted due to the high number needed (200) to save one child from a stroke, side effects, inconvenience to families, and cost. The STOP trial therefore sought to identify children at highest risk of stroke using transcranial Doppler ultrasound (TCD; \u003Ca id=\u0022xref-fig-1-1\u0022 class=\u0022xref-fig\u0022 href=\u0022#F1\u0022\u003EFigure 1\u003C\/a\u003E). Children were screened using TCD, and those with 2 measurements \u2265200 cm\/s were randomized to either periodic transfusion or standard care (including occasional transfusion). The study found that periodic transfusion reduced the risk of stroke by 92%, reduced other complications, and led to better height and weight gain (Adams et al. \u003Cem\u003ENEJM\u003C\/em\u003E 1998).\u003C\/p\u003E\n         \u003Cdiv id=\u0022F1\u0022 class=\u0022fig pos-float  odd\u0022\u003E\u003Cdiv class=\u0022highwire-figure\u0022\u003E\u003Cdiv class=\u0022fig-inline-img-wrapper\u0022\u003E\u003Cdiv class=\u0022fig-inline-img\u0022\u003E\u003Ca href=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/8\/1\/25\/F1.large.jpg?width=800\u0026amp;height=600\u0026amp;carousel=1\u0022 title=\u0022Stroke Risk Identification Using TCD.\u0022 class=\u0022fragment-images colorbox-load\u0022 rel=\u0022gallery-fragment-images-1911904202\u0022 data-figure-caption=\u0022Stroke Risk Identification Using TCD.\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003E\u003Cimg class=\u0022fragment-image\u0022 alt=\u0022Figure 1.\u0022 src=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/8\/1\/25\/F1.medium.gif\u0022\/\u003E\u003C\/a\u003E\u003C\/div\u003E\u003C\/div\u003E\u003Cul class=\u0022highwire-figure-links inline\u0022\u003E\u003Cli class=\u00220 first\u0022\u003E\u003Ca href=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/8\/1\/25\/F1.large.jpg?download=true\u0022 class=\u0022highwire-figure-link highwire-figure-link-download\u0022 title=\u0022Download Figure 1.\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EDownload figure\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00221\u0022\u003E\u003Ca href=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/8\/1\/25\/F1.large.jpg\u0022 class=\u0022highwire-figure-link highwire-figure-link-newtab\u0022 target=\u0022_blank\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EOpen in new tab\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00222 last\u0022\u003E\u003Ca href=\u0022\/highwire\/powerpoint\/10998\u0022 class=\u0022highwire-figure-link highwire-figure-link-ppt\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EDownload powerpoint\u003C\/a\u003E\u003C\/li\u003E\u003C\/ul\u003E\u003C\/div\u003E\u003Cdiv class=\u0022fig-caption\u0022 xmlns:xhtml=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022\u003E\u003Cspan class=\u0022fig-label\u0022\u003EFigure 1.\u003C\/span\u003E \n               \u003Cp id=\u0022p-4\u0022 class=\u0022first-child\u0022\u003EStroke Risk Identification Using TCD.\u003C\/p\u003E\n            \u003Cdiv class=\u0022sb-div caption-clear\u0022\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E\n         \u003Cp id=\u0022p-5\u0022\u003EThe presentation by Heather Fullerton, MD, University of California, San Francisco, CA, addressed whether the STOP trial findings influenced treatment of SCD patients. Using a California-wide database, Dr. Fullerton and colleagues found a downward trend in strokes in patients with SCD post-1998, the year that the STOP results were published. Data from a Kaiser Permanente cohort showed an upward trend in the numbers of SCD patients obtaining a first TCD post-1998, suggesting that the decrease in strokes were related to the identification of high-risk patients. \u201cWe definitely have some cause for optimism. We think that the stroke rates are declining, and we think this is due to implementation of this primary stroke prevention strategy,\u201d commented Dr. Fullerton. Obstacles remain, however. In a survey of 207 hematologists, 9 of 10 reported issues with acquiring TCDs, citing poor patient adherence and lack of facility availability. \u201cThis is really an issue for our neurology community, who is trying to make this [technology] increasingly available to these children,\u201d said Dr. Fullerton.\u003C\/p\u003E\n         \u003Cp id=\u0022p-6\u0022\u003EMichael DeBaun, MD, MPH, Washington University, St. Louis, MO, gave an overview of silent cerebral infarctions and future research in SCD-associated stroke prevention. Silent cerebral infarct is defined as an increased signal on T2-weighted imaging that is not accompanied by focal neurologic deficits. \u201cWe think about one-fifth of children who have a diagnosis of hemoglobin SS will have a silent cerebral infarct before their 18\u003Csup\u003Eth\u003C\/sup\u003E birthday,\u201d said Dr. DeBaun. Silent strokes cause significant cognitive deficits in these patients, leading to problems in learning and poor school performance. The objective of the Silent Cerebral Infarct Transfusion Trial (SITT) is to determine if prophylactic transfusions will result in a reduction of both clinically evident and silent strokes in children with SCD. The trial is ongoing, has randomized 127 patients to date, and will last approximately 6 years. The results of this trial should provide valuable insight into the natural history of SCD and further the understanding of the risks and benefits of transfusion therapy.\u003C\/p\u003E\n      \u003C\/div\u003E\u003Cul class=\u0022copyright-statement\u0022\u003E\u003Cli class=\u0022fn\u0022 id=\u0022copyright-statement-1\u0022\u003E\u00a9 2008 MD Conference Express\u003C\/li\u003E\u003C\/ul\u003E\u003Cspan class=\u0022highwire-journal-article-marker-end\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Cspan id=\u0022related-urls\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Ca href=\u0022http:\/\/mdc.sagepub.com\/content\/8\/1\/25.abstract\u0022 class=\u0022hw-link hw-link-article-abstract\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView Summary\u003C\/a\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E\n\u003C\/div\u003E\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_figures.js?nzmhep\u0022\u003E\u003C\/script\u003E\n\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_openurl.js?nzmhep\u0022\u003E\u003C\/script\u003E\n\u003C\/body\u003E\u003C\/html\u003E"}