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LearningRadiology Imaging Signs
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Case of the Week 374




What's the name of this sign?

  • 45 year-old male with hemoptysis



Axial CT scan of chest

1. Garland's sign
2. Monad's sign
3. Drooping Lily sign
4. Gibbous sign
5. Hampton's hump

Additional Image - Close-up of left upper lobe chest radiograph

 

Additional Image

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Close-up of left upper lobe chest radiograph


Answer:

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2. Monad's sign

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More (Click Discussion Tab)


Monad's sign

General Considerations

  • Sickle-shaped lucency, partially surrounding a soft tissue mass in a pulmonary cavity seen on conventional radiography and CT
  • Terminology can be confusing as a similar sign is described for both invasive aspergillosis and secondary, non-invasive, saprophytic aspergillosis

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.