Rebiopsy histology according to the previous histological diagnosis. (A) All rebiopsy cases and (B) 290 cases with r-PET analysis. The rebiopsy histology type is represented in this bar chart according to the previous histological subtype: iNHL, aNHL, and HL. ∗Out of 6 patients (11%) with discordant histology, 2 patients had nodular lymphocyte predominant HL subtype, and 2 patients had history of iNHL before diagnosis of classical Hodgkin lymphoma.