INS and Hyperglycemia: There were 184 patients in Cohort 1, of whom 65 (35.3%) patients proceeded with FDG PET/CT despite uncorrected hyperglycaemia (mean BGL 10.9 mmol/L ± 1.17), 3 patients had insufficient data recorded, 1 patient presenting with severe hyperglycaemia (31.2 mmol/L) received insulin in our department prior to referral for acute medical assessment and the remaining 115/184 (63.0%) patients (age 46–85 years) received insulin according to the empiric protocol.