Friday, March 2, 2012

Leiomyosarcoma vs. Leiomyoma on FDG-PET

While uterine leiomyosarcomas usually have moderate to intense FDG uptake and uterine leiomyomas usually have low to moderate FDG uptake, there is overlap in findings on FDG-PET. This, unfortunately, means that FDG PET cannot reliably differentiate leiomyosarcoma from leiomyoma.

The image above shows a uterine leiomyoma (arrow) with intense FDG activity (maximum SUV of around 10). It has remained stable in size and activity on 4 years of follow-up PET/CT.


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