| The "tangential calcium" sign A tangential calcium sign is a sign seen with an aortic aneurysm rupture. The calcified intimal rim is discontinuous and is seen to tangentially point away from the aneurysmal lumen. This sign is seen at the point of breach. There is associated retroperitoneal leakage. |
| The "inverted Napoleon's hat" sign The inverted Napoleon hat sign is a radiologic sign seen on the frontal pelvic or lumbar radiograph at the level of the 5th lumbar vertebra and the sacrum. It is seen when there is bilateral spondylolysis with marked anterolisthesis of L5 on S1 or marked exaggeration of the normal lordosis at the lumbosacral junction. Spondylolysis resulting in this degree of spondylolisthesis is more often congenital and/or traumatic in origin and less often degenerative. The "brim" of hat is formed by the caudal translation of the transverse processes and the "dome" of hat is formed by the body of L5. Cases and figures  |
| Phantom (invisible) organ sign The "phantom organ sign" refers to the obscuration of a small organ when a large mass arising from it renders the organ invisible. |
| The "paper-thin wall" appearance in acute mesenteric ischemia In the setting of primary arterial occlusion resulting in ischemia or transmural infarction, small bowel may become dilated with a classic "paper-thin wall" appearance [Figure 5b]. This appearance occurs as a result of loss of bowel wall tissue, vasculature, and muscular tone. However, in cases of reversible ischemia, mild bowel thickening may be noted. When acute arterial occlusion results in intramural hemorrhage, edema and/or superimposed infection, abnormal bowel wall thickening up to 15 mm of the small and large intestines is commonly demonstrated. |
| The changing image of gender |
| Chinese dragon sign: splenic artery calcification 'Chinese dragon sign' describes the appearance of tortuous calcified splenic artery on an abdominal radiograph.  |
The "pruned tree" appearance of primary sclerosing cholangitis |
| Utility of magnetic resonance imaging for placenta accreta spectrum (PAS) disorders |
| The "mosaic pattern" in hepatic sinusoidal dilatation |
"Horseshoe" sign in a female urethral diverticulum |
Alexandros Sfakianakis
Anapafseos 5 . Agios Nikolaos
Crete.Greece.72100
2841026182
Anapafseos 5 . Agios Nikolaos
Crete.Greece.72100
2841026182
6948891480
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