Signs in Radiology Scotty Dog Collar -is the pars intra-articulares – the site for spondylolysisAshley Davidoff MDTheCommonVein.netSigns in RadiologyArt of RadiologySeries Animals in the BodyX-RayTheCommonVein.net Caput MedusaCT courtesy of Dr Hani Makky Al Salam, Radiopaedia.org, rID: 8806Art courtesy CaravaggioAshley Davidoff MDTheCommonVein.netSigns in RadiologyArt of RadiologySigns in RadiologyCTscan Apple Core Lesion in the ColonDouble 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 tumorAshley Davidoff MDTheCommonVein.netFood in the Body and Signs in RadiologyArt of Radiology