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.

Reference

Sholkoff SD, Mainzer F: Button sequestrum revisited. Radiology 1971, 100:649-652.

Figures

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Attachments:


pelvisegbuttonseq.jpg (image/jpeg)