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FDG PET appearance of a postpartum uterus.

A 21-year-old woman with lymphoma underwent an F-18 fluorodeoxyglucose positron emission tomography (FDG PET) scan for cancer follow up. She was 5 days postpartum at the time of the scan. Intense increased FDG uptake was noted corresponding to the uterus and cervix on a computed tomography (CT) scan. The patient did not have any clinical evidence of infection, retained products of conception, or other postpartum complication. A follow-up PET scan done 5 months later did not demonstrate uterine activity. Diffuse intense increased uptake can be an expected finding in the postpartum uterus and does not necessarily indicate a postpartum complication.