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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


Close-up view of frontal chest radiograph



4. Eggshell calcification



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

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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.