Radiologic Signs
The Largest Illustrated Collection of Imaging Signs on the Web



D Index

David Letterman Sign-widening of distance between the scaphoid and lunate (>3mm) on PA view from ligament disruption-AKA Terry Thomas sign
Dense MCA Sign-early CT sign, <6hrs, of ischemic stroke seen with thrombosis of the middle cerebral artery; false + findings may occur
Double Bubble Sign-dilated stomach and proximal duodenum in newborn, typically seen in duodenal atresia, midgut volvulus or annular pancreas
Double Density Sign-overlapping of an enlarged left atrium and the normal right atrium on a frontal chest radiograph
Doughnut Sign-in nucs, radiotracer uptake surrounding a photopenic testis in testicular torsion; in GI CT, thickening of the bowel wall
Dense Hilum Sign-appearance of hilum which is neither enlarged nor calcified implying superimposed lung density
Draping Aorta Sign-blood that has leaked from the abdominal aorta
Deep Lateral Sulcus Sign-abnormally deep depression of the lateral condylopatellar
sulcus which can be an indirect sign of an ACL tear
Deep Sulcus Sign-inferiorly depressed costophrenic angle from pneumothorax seen on supine radiograph of chest
Double Bronchial Wall Sign-air outlining the trachea and proximal bronchi in pneumomediastinum
Drooping Lily Sign-appearance of lower pole calyces in a duplicated collecting system with a non-functioning upper pole
Double PCL Sign-low signal band parallel to PCL produced by fragment of meniscus in bucket handle tear on knee MRI
Double Duct Sign-dilatation of both the common bile duct and pancreatic duct on cross-sectional imaging, mostly by ca of pancreatic head or ampulla of vater
Double Track Sign-UGI-redundant mucosa separates barium into two columns in pyloric channel in hypertrophic pyloric stenosis
Dripping Candle Wax Sign-cortical hyperostosis on one side of bone likened to melting wax, seen in melorheostosis
Dromedary Hump Sign-cortical bump on lateral aspect of left kidney caused by compression by adjacent spleen
Drooping Shoulder Sign-inferior subluxation of shoulder from hemarthrosis or flaccid paralysis
Dagger Sign-dense line caused by ossification of supraspinous and interspinous ligaments in ankylosing spondylitis

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