Primary uterine non-Hodgkin's lymphomas are extremely rare, and consequently, imaging findings of this disease have rarely been reported in the literature. We present fluorine-18-fluorodeoxyglucose (18[F] FDG) positron emission tomography/computerized tomography (CT) and iodinated contrast CT findings in a young patient with primary uterine non-Hodgkin's B-cell lymphoma with right ovary involvement.