Osteoporosis circumscripta

Case contributed by Dr Andrew Dixon


Incidental finding on CT brain.

Patient Data

Age: 80 years
Gender: Male

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Extensive loss of bone density (lysis) involving the bilateral parietal and occipital bones, and the right temporal bone. No bone expansion or soft-tissue mass. The appearance is characteristic of the lytic phase of Paget disease and is often referred to as osteoporosis circumscripta

Case Discussion

Lytic phase Paget disease of the skull (osteoporosis circumscripta).

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