<prompt> All are TRUE about the pathological changes in pseudomembranous enterocolitis, EXCEPT:It is confined to the colonic mucosaThe whole colon is involvedThe epithelium is eroded and necrotic in ceain areasRectal sparing is not a feature  <response>: PATHOLOGICAL CHANGES IN PSEUDOMEMBRANOUS ENTEROCOLITIS:It is confined to the colonic mucosaIt appear as 1- to 2-mm whitish-yellow plaques initiallyThe whole colon is usually involved10 of patients have rectal sparingThe epithelium is eroded and necrotic in focal areas, with neutrophil infiltration of the mucosa Ref: Harrison, Edition-18, page-1092. 