| Location |
Multiple |
| Diagnosis |
Eosinophilic granuloma |
| Discussion |
Single slice of a CT scan of the pelvis with an abnormal lucent area with a sclerotic focus within it in the left hemipelvis. This sign was originally utilized to describe an unusual radiographic manifestation of Eosinophilic Granuloma. It is a round, lucent defect with a bony density, or sequestrum, in its center. This is not pathognomonic as other disease entities such as osteomyelitis can have a similar appearance.
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| Reference |
Sholkoff SD, Mainzer F: Button sequestrum revisited. Radiology 1971, 100:649-652. |
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