Residual increased fluorodeoxyglucose (FDG) uptake after ABVD therapy in two patients with Hodgkin’s lymphoma.

The typical butterfly-shaped configuration is suggestive for thymic hyperplasia (A), and this patient remained in complete remission after a follow-up of 23 months. The more focal uptake seen in patient (B) is more suspicious for residual tumor, progression in the residual mass was seen 6 months later on CT.