Gallium-avid thymic hyperplasia in an adult after chemotherapy for Hodgkin disease

This article presents the case of a 22-year-old patient with treated Hodgkin disease (HD) who had mediastinal widening on computed tomography scan after chemotherapy. This mass was gallium avid. These findings were explained by histologically documented benign thymic hyperplasia, the first such case reported in an adult with HD, to the knowledge of the authors. The literature on thymic hyperplasia after chemotherapy is reviewed.