High-dose salvage chemotherapy followed by haematopoietic stem cell transplantation (HCT) is the standard of care in transplant eligible relapsed/refractory (R/R) classical Hodgkin lymphoma (cHL).1 Approximately, half of patients receiving HCT will achieve long-term remissions, but relapse remains the most common cause of treatment failure. A number of prior studies investigated the value of pre-HCT positron emission tomography (PET) scan as a predictor of outcome. Considerable heterogeneity is noted within these studies due to methodology of PET interpretation, timeline of the scan prior to HCT and whether further clinical decisions were based on the scan results.2, 3, 4, 5 In light of the above, we examined the impact of pre-HCT PET/CT graded on the five-point scale Deauville criteria on the post-HCT outcome.