1.0Division of Gastroenterology and Hepatology/medicine/gigsa/medicine/gi/author/gsa/David F. Ransohoff, MD | Division of Gastroenterology and Hepatologyrich600338<blockquote class="wp-embedded-content" data-secret="PQVgkDvY1N"><a href="/medicine/gi/people/david-f-ransohoff-md/">David F. Ransohoff, MD</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="/medicine/gi/people/david-f-ransohoff-md/embed/#?secret=PQVgkDvY1N" width="600" height="338" title="“David F. Ransohoff, MD” — Division of Gastroenterology and Hepatology" data-secret="PQVgkDvY1N" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> /medicine/gi/wp-content/uploads/sites/1267/2021/10/DavidFRansohoff.jpg190250David F. Ransohoff MD, one of the first gastroenterologists to also train as a clinical epidemiologist, has had a longstanding academic interest in improving methods to evaluate screening tests for cancer. In colon cancer screening, he has evaluated colonoscopy, sigmoidoscopy, stool blood tests, and recently molecular markers used in cancer screening. He has served as … Read more