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LearningRadiology Imaging Signs
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Case of the Week 375




What's the name of this sign?

  • 53 year-old male with cough



Frontal Chest Radiograph

1. Hair-on-end
2. Deep sulcus sign
3. Angel wing sign
4. Eggshell calcification
5. Homan's sign

Additional Image - Close-up view of frontal chest radiograph

 

Additional Image

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Close-up view of frontal chest radiograph


Answer:

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4. Eggshell calcification

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More (Click Discussion Tab)


Eggshell calcification

General Considerations

  • Calcification around the periphery of lymph nodes
  • Reason for this pattern of calcification is not known
  • Most commonly seen in silicosis and coal-worker's pneumoconiosis (3-6%)
  • Also seen in sarcoid (5%)
  • Rarely in post-irradiated Hodgkin disease, blastomycosis, scleroderma, amyloid and histoplasmosis

    More ...


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    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.