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LearningRadiology Imaging Signs
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Case of the Week 376



What's the name of this sign?

  • 78 year-old male who fell off ladder



Frontal and lateral radiographs of femur

1. Signet sign
2. Rat-bite sign
3. Blade-of-grass sign
4. Crescent sign
5. Ring sign


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Answer:

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3. Blade-of-Grass Sign

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More (Click Discussion Tab)


Blade-of-Grass Sign


 General Considerations

  • V-spaded lucency in the metadiaphysis, usually seen in a long bone and representing the lytic phase of Paget disease
  • Most often seen in femur and tibia
  • In the skull, the lytic defect is referred to as osteoporosis circumscripta, most often seen in the frontal bone

    More ...


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    LearningRadiology.com
    is an award-winning educational website aimed primarily at medical students and radiology residents-in-training, containing  lectures, handouts, images, Cases of the Week, archives of cases, quizzes, flashcards of differential diagnoses and “most commons” lists, primarily in the areas of chest, GI, GU cardiac, bone and neuroradiology.