Apple Core Lesion in the Colon Double contrast barium enema shows a focal narrowing of the lumen (a, outlined in green in b and surrounded by tumor in c). At the inferior and superior aspects of the narrowing there is heaping up of the surrounding tumor. Image shows an appl core with the green in d representing the lumen. Image f is a gross pathology specimen showing the ?apple core? appearance with luminal narrowing surrounded by tumor Ashley Davidoff MD TheCommonVein.net Food in the Body and Signs in Radiology Art of Radiology