Summary of lenalidomide administration. Graphical summary of lenalidomide administration to 38 cHL patients, with individual patients on the y-axis and the number of cycles and dose of lenalidomide administered on the x-axis. If an intra-cycle dose reduction was performed, the lowest dose used for a given cycle is indicated. Lenalidomide was administered on days 1-21 of a 28-day cycle, initiated at 25 mg/d. *Ongoing lenalidomide therapy.